Please note that different copyrights might apply for the provided documents and links. In particular, please note the generic copyright notice(s) from professional societies at the bottom. You can obtain my latest publication performance metrics from Google Scholar following this link.

2016

  • P. Seeling, “Switching to blend-ed: e ects of replacing the textbook with the browser in an introductory computer programming course,” in Proc. of asee/ieee frontiers in education conference (FIE), Eerie, PA, USA, 2016.
    [BibTeX]
    @inproceedings{Se1610:Switching,
    Address = {Eerie, PA, USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of ASEE/IEEE Frontiers in Education Conference {(FIE)}},
    Date-Added = {2016-08-05 18:29:12 +0000},
    Date-Modified = {2016-08-05 18:29:50 +0000},
    Month = oct,
    Title = {Switching to Blend-Ed: E ects of Replacing the Textbook with the Browser in an Introductory Computer Programming Course},
    Year = 2016}

  • S. Mead, N. Veeramachaneni, and P. Seeling, “An overview of mobile device network activities: characteristics of heterogeneous network interfaces,” in Proc. of ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2016, pp. 312-313.
    [BibTeX]
    @inproceedings{MeVeSe1601:NTrax,
    Address = {Las Vegas, NV, USA},
    Author = {Sean Mead and Nagasaiamithkumar Veeramachaneni and Patrick Seeling},
    Booktitle = {Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Date-Modified = {2016-02-18 15:26:30 +0000},
    Month = jan,
    Pages = {312--313},
    Title = {An Overview of Mobile Device Network Activities: Characteristics of Heterogeneous Network Interfaces},
    Year = {2016}}

  • T. A. Johnson and P. Seeling, “Cacheconnect: on–device proxy and web cache for performance increases (demo),” in Proc. of ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2016, pp. 275-276.
    [BibTeX]
    @inproceedings{JoSe1601:cacheConnect,
    Address = {Las Vegas, NV, USA},
    Author = {Troy A. Johnson and Patrick Seeling},
    Booktitle = {Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Date-Modified = {2016-02-18 15:25:33 +0000},
    Month = jan,
    Pages = {275--276},
    Title = {cacheConnect: On--Device Proxy and Web Cache for Performance Increases (Demo)},
    Year = {2016}}

  • P. Seeling, “Visual user experience difference: image compression impacts on the quality of experience in augmented binocular vision,” in Proc. of ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2016, pp. 931-936.
    [BibTeX]
    @inproceedings{Se1601:Visual,
    Address = {Las Vegas, NV, USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Date-Modified = {2016-02-18 15:24:35 +0000},
    Month = jan,
    Pages = {931--936},
    Title = {Visual User Experience Difference: Image Compression Impacts on the Quality of Experience in Augmented Binocular Vision},
    Year = {2016}}

  • T. A. Johnson and P. Seeling, “Landing on the mobile web: from browsing to long-term modeling,” Ieee communications magazine, vol. 54, iss. 2, pp. 146-151, 2016.
    [BibTeX] [Abstract]

    Browsing the web has become a common task performed using personal mobile devices, resulting in significant access network and bat- tery limitation challenges. Efforts to alleviate these challenges are commonly based around approaches incorporating elements of on-de- vice and network optimizations. Energy-ef cient mobile web content delivery has, in turn, attract- ed a significant body of research and practical developments. However, the efforts put forth today might not result in long-term applicable results should the underlying characteristics of the mobile content change drastically over time. As caching frequently used data locally is a com- mon initial approach employed to limit network traf c and energy expenditures while “on the go,” we evaluate the long-term suitability of approxi- mating a basic set of parameters for a cache and request behavior model using a popular large data set. We present a convenient approach that can employ a general approximation of param- eters over time. Our long-term modeling of the underlying factors results in an acceptable level of peak inaccuracies in simulations for more than a year’s time horizon. In turn, practitioners and researchers are enabled to readily employ model- ing and simulation approaches over a signi cant period of time with only slight impacts on their approaches and results.

    @article{JoSe1602:Landing,
    Abstract = {Browsing the web has become a common task performed using personal mobile devices, resulting in significant access network and bat- tery limitation challenges. Efforts to alleviate these challenges are commonly based around approaches incorporating elements of on-de- vice and network optimizations. Energy-ef cient mobile web content delivery has, in turn, attract- ed a significant body of research and practical developments. However, the efforts put forth today might not result in long-term applicable results should the underlying characteristics of the mobile content change drastically over time. As caching frequently used data locally is a com- mon initial approach employed to limit network traf c and energy expenditures while ``on the go,'' we evaluate the long-term suitability of approxi- mating a basic set of parameters for a cache and request behavior model using a popular large data set. We present a convenient approach that can employ a general approximation of param- eters over time. Our long-term modeling of the underlying factors results in an acceptable level of peak inaccuracies in simulations for more than a year's time horizon. In turn, practitioners and researchers are enabled to readily employ model- ing and simulation approaches over a signi cant period of time with only slight impacts on their approaches and results.},
    Author = {T. A. Johnson and P. Seeling},
    Date-Added = {2016-02-18 15:26:55 +0000},
    Date-Modified = {2016-02-19 16:26:52 +0000},
    Journal = {IEEE Communications Magazine},
    Month = feb,
    Number = {2},
    Pages = {146--151},
    Title = {Landing on the Mobile Web: From Browsing to Long-Term Modeling},
    Volume = {54},
    Year = {2016}}

  • Máté. Tömösközi, P. Seeling, P. Ekler, and F. H. P. Fitzek, “Performance prediction of robust header compression version 2 for rtp audio streaming using linear regression,” in In proc. of european wireless 2016 (EW), Oulu, Finland, 2016.
    [BibTeX] [Abstract]

    Low latency and high reliability is a critical characteristics of many wireless use cases, such as real–time video surveillance. In a dense network the best way to resolve such problems is by utilizing the fastest and most reliable connection to the destination. Classical solutions, such as Reed–Solomon codes, increase the reliability, but also introduce additional coding delays at the relays. This paper describes the reduction of the packet delay achievable by network coding through a series of network nodes. Our metric captures the elapsed time between (network) encoding RTP frames and complete decoding of the packets on the receiver side while playing out the video recording contained in the payload. Our solutions are implemented and evaluated on serially connected Raspberry Pi devices and a network (de)coding enabled software running on a regular PC. We find that the recoding relays work at least as well as the systematic approach to network coding. In all cases network coding outperformed schemes employing the classical forward error correcting Reed–Solomon codes. This low per–packet delay and the inherent reliability of our schemes make these solutions particularly suitable for real–time multimedia delivery in contrast to other classical and network coding strategies.

    @inproceedings{ToSeEkFi1605:Performance,
    Abstract = {Low latency and high reliability is a critical characteristics of many
    wireless use cases, such as real--time video surveillance. In a dense
    network the best way to resolve such problems is by utilizing the fastest
    and most reliable connection to the destination. Classical solutions, such
    as Reed--Solomon codes, increase the reliability, but also introduce
    additional coding delays at the relays. This paper describes the reduction
    of the packet delay achievable by network coding through a series of
    network nodes. Our metric captures the elapsed time between (network)
    encoding RTP frames and complete decoding of the packets on the receiver
    side while playing out the video recording contained in the payload. Our
    solutions are implemented and evaluated on serially connected Raspberry Pi
    devices and a network (de)coding enabled software running on a regular PC.
    We find that the recoding relays work at least as well as the systematic
    approach to network coding. In all cases network coding outperformed
    schemes employing the classical forward error correcting Reed--Solomon
    codes. This low per--packet delay and the inherent reliability of our
    schemes make these solutions particularly suitable for real--time
    multimedia delivery in contrast to other classical and network coding
    strategies.},
    Address = {Oulu, Finland},
    Author = {M{\'a}t{\'e} {T{\"o}m{\"o}sk{\"o}zi} and P. Seeling and Peter Ekler and Frank H.P. Fitzek},
    Booktitle = {In Proc. of European Wireless 2016 ({EW})},
    Date-Added = {2016-08-05 18:24:09 +0000},
    Date-Modified = {2016-08-05 18:26:44 +0000},
    Keywords = {Network coding; Video surveillance; Video streaming; Real--time delay},
    Month = May,
    Title = {Performance Prediction of Robust Header Compression version 2 for RTP Audio Streaming Using Linear Regression},
    Year = 2016}

  • P. Seeling, “Evolving an introductory programming course: impacts of student self-empowerment, guided hands-on times, and self-directed training.,” in Proc. of asee/ieee frontiers in education conference (FIE), Eerie, PA, USA, 2016.
    [BibTeX]
    @inproceedings{Se1610:Evolving,
    Address = {Eerie, PA, USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of ASEE/IEEE Frontiers in Education Conference {(FIE)}},
    Date-Added = {2016-08-05 18:29:55 +0000},
    Date-Modified = {2016-08-05 18:30:06 +0000},
    Month = oct,
    Title = {Evolving an Introductory Programming Course: Impacts of Student Self-Empowerment, Guided Hands-On Times, and Self-Directed Training.},
    Year = 2016}

  • Máté. Tömösközi, P. Seeling, P. Ekler, and F. H. P. Fitzek, “Regression model building and e ciency prediction of rohcv2 compressor implementations for voip,” in Proc. of ieee globecom, Washington, D.C., USA, 2016.
    [BibTeX] [Abstract]

    Low latency and high reliability is a critical characteristics of many wireless use cases, such as real–time video surveillance. In a dense network the best way to resolve such problems is by utilizing the fastest and most reliable connection to the destination. Classical solutions, such as Reed–Solomon codes, increase the reliability, but also introduce additional coding delays at the relays. This paper describes the reduction of the packet delay achievable by network coding through a series of network nodes. Our metric captures the elapsed time between (network) encoding RTP frames and complete decoding of the packets on the receiver side while playing out the video recording contained in the payload. Our solutions are implemented and evaluated on serially connected Raspberry Pi devices and a network (de)coding enabled software running on a regular PC. We find that the recoding relays work at least as well as the systematic approach to network coding. In all cases network coding outperformed schemes employing the classical forward error correcting Reed–Solomon codes. This low per–packet delay and the inherent reliability of our schemes make these solutions particularly suitable for real–time multimedia delivery in contrast to other classical and network coding strategies.

    @inproceedings{ToSeEkFi1609:Regression,
    Abstract = {Low latency and high reliability is a critical characteristics of many
    wireless use cases, such as real--time video surveillance. In a dense
    network the best way to resolve such problems is by utilizing the fastest
    and most reliable connection to the destination. Classical solutions, such
    as Reed--Solomon codes, increase the reliability, but also introduce
    additional coding delays at the relays. This paper describes the reduction
    of the packet delay achievable by network coding through a series of
    network nodes. Our metric captures the elapsed time between (network)
    encoding RTP frames and complete decoding of the packets on the receiver
    side while playing out the video recording contained in the payload. Our
    solutions are implemented and evaluated on serially connected Raspberry Pi
    devices and a network (de)coding enabled software running on a regular PC.
    We find that the recoding relays work at least as well as the systematic
    approach to network coding. In all cases network coding outperformed
    schemes employing the classical forward error correcting Reed--Solomon
    codes. This low per--packet delay and the inherent reliability of our
    schemes make these solutions particularly suitable for real--time
    multimedia delivery in contrast to other classical and network coding
    strategies.},
    Address = {Washington, D.C., USA},
    Author = {M{\'a}t{\'e} {T{\"o}m{\"o}sk{\"o}zi} and P. Seeling and Peter Ekler and Frank H.P. Fitzek},
    Booktitle = {Proc. of IEEE GLOBECOM},
    Date-Added = {2016-08-05 18:27:01 +0000},
    Date-Modified = {2016-08-05 18:31:08 +0000},
    Month = dec,
    Title = {Regression Model Building and E ciency Prediction of RoHCv2 Compressor Implementations for VoIP},
    Year = 2016}

  • Máté. Tömösközi, P. Seeling, P. Ekler, and F. H. P. Fitzek, “Efficiency gain for rohc compressor implementations with dynamic configuration,” in In proc. of ieee vtc-fall workshop on cellular internet of things – emerging trends and enabling technologies, Montreal, Quebec, CA, 2016.
    [BibTeX] [Abstract]

    Low latency and high reliability is a critical characteristics of many wireless use cases, such as real–time video surveillance. In a dense network the best way to resolve such problems is by utilizing the fastest and most reliable connection to the destination. Classical solutions, such as Reed–Solomon codes, increase the reliability, but also introduce additional coding delays at the relays. This paper describes the reduction of the packet delay achievable by network coding through a series of network nodes. Our metric captures the elapsed time between (network) encoding RTP frames and complete decoding of the packets on the receiver side while playing out the video recording contained in the payload. Our solutions are implemented and evaluated on serially connected Raspberry Pi devices and a network (de)coding enabled software running on a regular PC. We find that the recoding relays work at least as well as the systematic approach to network coding. In all cases network coding outperformed schemes employing the classical forward error correcting Reed–Solomon codes. This low per–packet delay and the inherent reliability of our schemes make these solutions particularly suitable for real–time multimedia delivery in contrast to other classical and network coding strategies.

    @inproceedings{ToSeEkFi1609:Efficiency,
    Abstract = {Low latency and high reliability is a critical characteristics of many
    wireless use cases, such as real--time video surveillance. In a dense
    network the best way to resolve such problems is by utilizing the fastest
    and most reliable connection to the destination. Classical solutions, such
    as Reed--Solomon codes, increase the reliability, but also introduce
    additional coding delays at the relays. This paper describes the reduction
    of the packet delay achievable by network coding through a series of
    network nodes. Our metric captures the elapsed time between (network)
    encoding RTP frames and complete decoding of the packets on the receiver
    side while playing out the video recording contained in the payload. Our
    solutions are implemented and evaluated on serially connected Raspberry Pi
    devices and a network (de)coding enabled software running on a regular PC.
    We find that the recoding relays work at least as well as the systematic
    approach to network coding. In all cases network coding outperformed
    schemes employing the classical forward error correcting Reed--Solomon
    codes. This low per--packet delay and the inherent reliability of our
    schemes make these solutions particularly suitable for real--time
    multimedia delivery in contrast to other classical and network coding
    strategies.},
    Address = {Montreal, Quebec, CA},
    Author = {M{\'a}t{\'e} {T{\"o}m{\"o}sk{\"o}zi} and P. Seeling and Peter Ekler and Frank H.P. Fitzek},
    Booktitle = {In Proc. of IEEE VTC-Fall Workshop on Cellular Internet of Things - Emerging Trends and Enabling Technologies},
    Date-Added = {2016-08-05 18:30:17 +0000},
    Date-Modified = {2016-08-05 18:30:17 +0000},
    Month = sep,
    Title = {Efficiency Gain for RoHC Compressor Implementations with Dynamic Configuration},
    Year = 2016}

  • Máté. Tömösközi, P. Seeling, P. Ekler, and F. H. P. Fitzek, “Performance evaluation of network header compression schemes for udp, rtp and tcp,” Periodica polytechnica electrical engineering and computer science, vol. Online first, pp. 1-12, 2016.
    [BibTeX] [Download PDF]
    @article{ToSeEkFi16:Performance,
    Author = {M{\'a}t{\'e} {T{\"o}m{\"o}sk{\"o}zi} and P. Seeling and Peter Ekler and Frank H.P. Fitzek},
    Date-Added = {2016-04-21 20:09:03 +0000},
    Date-Modified = {2016-04-21 20:13:26 +0000},
    Journal = {Periodica Polytechnica Electrical Engineering and Computer Science},
    Pages = {1--12},
    Title = {Performance Evaluation of Network Header Compression Schemes for UDP, RTP and TCP},
    Url = {http://www.pp.bme.hu/eecs/article/download/8958/7031},
    Volume = {Online first},
    Year = 2016,
    Bdsk-Url-1 = {http://www.pp.bme.hu/eecs/article/download/8958/7031}}

2015

  • P. Seeling, “Assessing student views of traditional, free, and interactive modifications for an introductory networking course,” in Proc. of asee/ieee frontiers in education conference (FIE), El Paso, TX, USA, 2015.
    [BibTeX]
    @inproceedings{Se1510:StudentViews,
    Address = {El Paso, TX, USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of ASEE/IEEE Frontiers in Education Conference {(FIE)}},
    Month = oct,
    Title = {Assessing Student Views of Traditional, Free, and Interactive Modifications for an Introductory Networking Course},
    Year = 2015}

  • P. Seeling, “Augmented lectures: a liquid feedback system for the traditional and blended classroom,” in Proc. of acm annual conference on information technology education (SIGITE), Chicago, IL, USA, 2015.
    [BibTeX]
    @inproceedings{Se1510:AugmentedLectures,
    Address = {Chicago, IL, USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of ACM Annual Conference on Information Technology Education {(SIGITE)}},
    Month = oct,
    Title = {Augmented Lectures: A Liquid Feedback System for the Traditional and Blended Classroom},
    Year = 2015}

  • M. P. McGarry and P. Seeling, “Lecture, narrated slides, or first person view? impact of presentation on learning outcomes,” in Proc. of asee/ieee frontiers in education conference (FIE), El Paso, TX, USA, 2015.
    [BibTeX]
    @inproceedings{McSe1510:Lecture,
    Address = {El Paso, TX, USA},
    Author = {Michael P. McGarry and Patrick Seeling},
    Booktitle = {Proc. of ASEE/IEEE Frontiers in Education Conference {(FIE)}},
    Month = oct,
    Title = {Lecture, Narrated Slides, or First Person View? Impact of Presentation on Learning Outcomes},
    Year = 2015}

  • T. Johnson and P. Seeling, “Landing page characteristics model for mobile web performance evaluations on object and page levels,” in Proc. of ieee international conference on communications (icc), London, United Kingdom, 2015, pp. 5226-5231.
    [BibTeX] [Abstract]

    As the main web page access modality shifts to mobile devices, evaluations of the impact on underlying networks is required to perform long–term strategic optimizations. In this paper, we characterize individual mobile web page objects by size, cache expiration, and their composition into pages. Employing popular mobile web landing pages, we evaluate their characteristics on an individual and composed page level to derive a model that captures their main facets with respect to object size and caching distributions on a lumped and contextually aggregated page level. We observe that similar distributions can be employed for overall object sizes as well as their composition to web pages, while the cache expiration ages need to be taken into account for different contextual types of web pages. Employing our model, we successfully approximate cache lifetimes for the mobile web, demonstrating its use for mobile web performance evaluations. The employed model thus allows network operators to perform broad planning on different time scales.

    @inproceedings{Seel1506:Landing,
    Abstract = {As the main web page access modality shifts to mobile devices, evaluations
    of the impact on underlying networks is required to perform long--term
    strategic optimizations. In this paper, we characterize individual mobile
    web page objects by size, cache expiration, and their composition into
    pages. Employing popular mobile web landing pages, we evaluate their
    characteristics on an individual and composed page level to derive a model
    that captures their main facets with respect to object size and caching
    distributions on a lumped and contextually aggregated page level. We
    observe that similar distributions can be employed for overall object sizes
    as well as their composition to web pages, while the cache expiration ages
    need to be taken into account for different contextual types of web pages.
    Employing our model, we successfully approximate cache lifetimes for the
    mobile web, demonstrating its use for mobile web performance evaluations.
    The employed model thus allows network operators to perform broad planning
    on different time scales.},
    Address = {London, United Kingdom},
    Author = {Troy Johnson and Patrick Seeling},
    Booktitle = {Proc. of IEEE International Conference on Communications (ICC)},
    Date-Added = {2015-04-07 16:42:19 +0000},
    Date-Modified = {2015-08-28 14:33:06 +0000},
    Days = 8,
    Keywords = {Mobile communication; traffic modeling; data communications},
    Month = jun,
    Pages = {5226--5231},
    Title = {Landing Page Characteristics Model for Mobile Web Performance Evaluations on Object and Page Levels},
    Year = 2015}

  • P. Seeling, “Augmented vision and quality of experience assessment: towards a unified evaluation framework,” in Proc. of ieee icc workshop on quality of experience-based management for future internet applications and services (qoe-fi), London, United Kingdom, 2015.
    [BibTeX] [Abstract]

    In this paper, we address the need to standardize testing for new display modalities in upcoming media consumption scenarios. Specifically, we consider commercially available optical see-through devices, typically employed by operators in augmented vision or augmented reality scenarios. Based on current multimedia evaluation frameworks commonly applied to determine the subjective quality of experience, we extrapolate onto the additional environmental challenges provided by the overlay of media content with real-world backgrounds. We derive an overall framework of configurations and metrics that should be part of subjective quality assessment studies and be incorporated into future databases to provide a high quality ground truth foundation for long-term applicability. We present an exemplary experimental setup with related components currently in use to perform human subject experiments for this domain.

    @inproceedings{Seel1506:Augmented,
    Abstract = {In this paper, we address the need to standardize testing for new display
    modalities in upcoming media consumption scenarios. Specifically, we
    consider commercially available optical see-through devices, typically
    employed by operators in augmented vision or augmented reality scenarios.
    Based on current multimedia evaluation frameworks commonly applied to
    determine the subjective quality of experience, we extrapolate onto the
    additional environmental challenges provided by the overlay of media
    content with real-world backgrounds. We derive an overall framework of
    configurations and metrics that should be part of subjective quality
    assessment studies and be incorporated into future databases to provide a
    high quality ground truth foundation for long-term applicability. We
    present an exemplary experimental setup with related components currently
    in use to perform human subject experiments for this domain.},
    Address = {London, United Kingdom},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of IEEE ICC Workshop on Quality of Experience-based Management for Future Internet Applications and Services (QoE-FI)},
    Date-Added = {2015-04-07 16:42:34 +0000},
    Date-Modified = {2015-04-07 16:45:08 +0000},
    Days = 8,
    Keywords = {Quality of experience; Augmented reality; Image quality; Multimedia systems},
    Month = jun,
    Title = {Augmented Vision and Quality of Experience Assessment: Towards a Unified Evaluation Framework},
    Year = 2015}

  • Y. Alghamdi and P. Seeling, “Activity-based cloud sending: push services for user device multiplicity,” in Proc. of ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2015.
    [BibTeX]
    @inproceedings{AlSe15,
    Address = {Las Vegas, NV, USA},
    Author = {Yousef Alghamdi and Patrick Seeling},
    Booktitle = {Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Date-Modified = {2014-12-27 14:20:38 +0000},
    Month = jan,
    Title = {Activity-Based Cloud Sending: Push Services for User Device Multiplicity},
    Year = {2015}}

  • P. Seeling, “Network traffic characteristics of proxied wearable devices: a day with google glass,” in Proc. of ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2015.
    [BibTeX]
    @inproceedings{Se15,
    Address = {Las Vegas, NV, USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Date-Modified = {2015-03-26 19:07:38 +0000},
    Month = jan,
    Title = {Network Traffic Characteristics of Proxied Wearable Devices: A Day with Google Glass},
    Year = {2015}}

  • J. Lee and P. Seeling, “Capacity level modeling of mobile device bandwidth requirements employing high utilization mobile applications,” Computer communications, vol. 57, pp. 64-72, 2015.
    [BibTeX] [Abstract]

    Mobile network providers face an ever-increasing number of mobile devices requesting similarly increasing amounts of data. In this article, we present a two-step approach to modeling and simulating the amounts of data produced by mobile devices based on applications that are highly utilized on the network. In the first step, we separate the applications on a mobile device into highly utilized and background ones for the overall population to be modeled. With the identified overall application groups, we employ a four-state Hidden Markov Model to capture the characteristics of the high utilization applications as aggregates per device; the characteristics of the background applications are matched to four states, dependent on the high utilization aggregates’ states. Utilizing the Exponential distribution for both, we closely match their original user-based characteristics. The suitability of our model is lastly corroborated through simulation-based comparisons of estimations for the bandwidth requirements of the individual users; or model’s estimates are typically within ten percent of the original values.

    @article{LeSe14a,
    Abstract = {Mobile network providers face an ever-increasing number of mobile devices requesting similarly increasing amounts of data. In this article, we present a two-step approach to modeling and simulating the amounts of data produced by mobile devices based on applications that are highly utilized on the network. In the first step, we separate the applications on a mobile device into highly utilized and background ones for the overall population to be modeled. With the identified overall application groups, we employ a four-state Hidden Markov Model to capture the characteristics of the high utilization applications as aggregates per device; the characteristics of the background applications are matched to four states, dependent on the high utilization aggregates' states. Utilizing the Exponential distribution for both, we closely match their original user-based characteristics. The suitability of our model is lastly corroborated through simulation-based comparisons of estimations for the bandwidth requirements of the individual users; or model's estimates are typically within ten percent of the original values.},
    Author = {Junghyo Lee and Patrick Seeling},
    Date-Modified = {2016-02-18 15:31:30 +0000},
    Journal = {Computer Communications},
    Month = feb,
    Pages = {64--72},
    Title = {Capacity Level Modeling of Mobile Device Bandwidth Requirements Employing High Utilization Mobile Applications},
    Volume = {57},
    Year = {2015}}

  • Máté. Tömösközi, F. H. P. Fitzek, D. E. Lucani, M. V. Pedersen, P. Seeling, and P. Ekler, “On the packet delay characteristics for serially–connected links using random linear network coding with and without recoding,” in In proc. of european wireless 2015 (EW), Budapest, Hungary, 2015.
    [BibTeX] [Abstract]

    Low latency and high reliability is a critical characteristics of many wireless use cases, such as real–time video surveillance. In a dense network the best way to resolve such problems is by utilizing the fastest and most reliable connection to the destination. Classical solutions, such as Reed–Solomon codes, increase the reliability, but also introduce additional coding delays at the relays. This paper describes the reduction of the packet delay achievable by network coding through a series of network nodes. Our metric captures the elapsed time between (network) encoding RTP frames and complete decoding of the packets on the receiver side while playing out the video recording contained in the payload. Our solutions are implemented and evaluated on serially connected Raspberry Pi devices and a network (de)coding enabled software running on a regular PC. We find that the recoding relays work at least as well as the systematic approach to network coding. In all cases network coding outperformed schemes employing the classical forward error correcting Reed–Solomon codes. This low per–packet delay and the inherent reliability of our schemes make these solutions particularly suitable for real–time multimedia delivery in contrast to other classical and network coding strategies.

    @inproceedings{Tom1505,
    Abstract = {Low latency and high reliability is a critical characteristics of many
    wireless use cases, such as real--time video surveillance. In a dense
    network the best way to resolve such problems is by utilizing the fastest
    and most reliable connection to the destination. Classical solutions, such
    as Reed--Solomon codes, increase the reliability, but also introduce
    additional coding delays at the relays. This paper describes the reduction
    of the packet delay achievable by network coding through a series of
    network nodes. Our metric captures the elapsed time between (network)
    encoding RTP frames and complete decoding of the packets on the receiver
    side while playing out the video recording contained in the payload. Our
    solutions are implemented and evaluated on serially connected Raspberry Pi
    devices and a network (de)coding enabled software running on a regular PC.
    We find that the recoding relays work at least as well as the systematic
    approach to network coding. In all cases network coding outperformed
    schemes employing the classical forward error correcting Reed--Solomon
    codes. This low per--packet delay and the inherent reliability of our
    schemes make these solutions particularly suitable for real--time
    multimedia delivery in contrast to other classical and network coding
    strategies.},
    Address = {Budapest, Hungary},
    Author = {M{\'a}t{\'e} {T{\"o}m{\"o}sk{\"o}zi} and Frank H.P. Fitzek and Daniel E. Lucani and Morten V. Pedersen and Patrick Seeling and P{\'e}ter Ekler},
    Booktitle = {In Proc. of European Wireless 2015 ({EW})},
    Keywords = {Network coding; Video surveillance; Video streaming; Real--time delay},
    Month = may,
    Title = {On the Packet Delay Characteristics for Serially--Connected Links using Random Linear Network Coding with and without Recoding},
    Year = 2015}

  • P. Seeling, “Towards quality of experience determination for video in augmented binocular vision scenarios,” Signal processing: image communication, vol. 33, pp. 41-50, 2015.
    [BibTeX] [Abstract]

    Abstract With the continuous growth in the consumer markets of mobile smartphones and increasingly in augmented binocular vision wearable devices, several avenues of research investigate the relationships between the quality perceived by mobile users and the delivery mechanisms at play to support a high quality of experience for mobile users. In this paper, we present the first study that evaluates the relationships of mobile movie quality and the viewer-perceived quality thereof in an augmented binocular vision setting employing commercially available head-mounted see-through devices. We find that participants tend to overestimate the video quality when compared to a scaled representation and exhibit a significant variation of accuracy that leans onto the movie content and its dynamics. Our findings, thus, can broadly impact future media adaptation and delivery mechanisms for this new display format of mobile multimedia and spur follow-up research in this increasingly popular domain.

    @article{Se15augment,
    Abstract = {Abstract With the continuous growth in the consumer markets of mobile smartphones and increasingly in augmented binocular vision wearable devices, several avenues of research investigate the relationships between the quality perceived by mobile users and the delivery mechanisms at play to support a high quality of experience for mobile users. In this paper, we present the first study that evaluates the relationships of mobile movie quality and the viewer-perceived quality thereof in an augmented binocular vision setting employing commercially available head-mounted see-through devices. We find that participants tend to overestimate the video quality when compared to a scaled representation and exhibit a significant variation of accuracy that leans onto the movie content and its dynamics. Our findings, thus, can broadly impact future media adaptation and delivery mechanisms for this new display format of mobile multimedia and spur follow-up research in this increasingly popular domain. },
    Author = {Patrick Seeling},
    Date-Added = {2015-04-07 16:39:43 +0000},
    Date-Modified = {2015-04-07 16:40:10 +0000},
    Journal = {Signal Processing: Image Communication},
    Month = apr,
    Number = {0},
    Pages = {41--50},
    Title = {Towards quality of experience determination for video in augmented binocular vision scenarios},
    Volume = {33},
    Year = {2015}}

  • Máté. Tömösközi, P. Seeling, P. Ekler, and F. H. P. Fitzek, “Performance evaluation and implementation of ip and robust header compression schemes for tcp and udp traffic in the wireless context,” in In proc. of eastern european regional conference on the engineering of computer based systems (ecbs-eerc), Brno, Czech Republic, 2015.
    [BibTeX] [Abstract]

    Low latency and high reliability is a critical characteristics of many wireless use cases, such as real–time video surveillance. In a dense network the best way to resolve such problems is by utilizing the fastest and most reliable connection to the destination. Classical solutions, such as Reed–Solomon codes, increase the reliability, but also introduce additional coding delays at the relays. This paper describes the reduction of the packet delay achievable by network coding through a series of network nodes. Our metric captures the elapsed time between (network) encoding RTP frames and complete decoding of the packets on the receiver side while playing out the video recording contained in the payload. Our solutions are implemented and evaluated on serially connected Raspberry Pi devices and a network (de)coding enabled software running on a regular PC. We find that the recoding relays work at least as well as the systematic approach to network coding. In all cases network coding outperformed schemes employing the classical forward error correcting Reed–Solomon codes. This low per–packet delay and the inherent reliability of our schemes make these solutions particularly suitable for real–time multimedia delivery in contrast to other classical and network coding strategies.

    @inproceedings{ToSeEkFi1508,
    Abstract = {Low latency and high reliability is a critical characteristics of many
    wireless use cases, such as real--time video surveillance. In a dense
    network the best way to resolve such problems is by utilizing the fastest
    and most reliable connection to the destination. Classical solutions, such
    as Reed--Solomon codes, increase the reliability, but also introduce
    additional coding delays at the relays. This paper describes the reduction
    of the packet delay achievable by network coding through a series of
    network nodes. Our metric captures the elapsed time between (network)
    encoding RTP frames and complete decoding of the packets on the receiver
    side while playing out the video recording contained in the payload. Our
    solutions are implemented and evaluated on serially connected Raspberry Pi
    devices and a network (de)coding enabled software running on a regular PC.
    We find that the recoding relays work at least as well as the systematic
    approach to network coding. In all cases network coding outperformed
    schemes employing the classical forward error correcting Reed--Solomon
    codes. This low per--packet delay and the inherent reliability of our
    schemes make these solutions particularly suitable for real--time
    multimedia delivery in contrast to other classical and network coding
    strategies.},
    Address = {Brno, Czech Republic},
    Author = {M{\'a}t{\'e} {T{\"o}m{\"o}sk{\"o}zi} and P. Seeling and Peter Ekler and Frank H.P. Fitzek},
    Booktitle = {In Proc. of Eastern European Regional Conference on the Engineering of Computer Based Systems (ECBS-EERC)},
    Date-Added = {2016-08-05 18:24:05 +0000},
    Date-Modified = {2016-08-05 18:24:05 +0000},
    Keywords = {Network coding; Video surveillance; Video streaming; Real--time delay},
    Month = August,
    Title = {Performance Evaluation and Implementation of IP and Robust Header Compression Schemes for TCP and UDP Traffic in the Wireless Context},
    Year = 2015}

  • J. A. Pulcifer–Stump, P. Seeling, J. L. Koch, S. Kettler, and T. Kaya, “From pit to long lie: a fall-detection algorithm for smart phones,” International journal of engineering research & innovation (ijeri), vol. 15, iss. 2, pp. 23-30, 2015.
    [BibTeX]
    @article{PuSeKoKeKa1503:From,
    Author = {J. A. Pulcifer--Stump and P. Seeling and J. L. Koch and S. Kettler and T. Kaya},
    Date-Added = {2016-02-18 15:29:31 +0000},
    Date-Modified = {2016-02-18 15:30:51 +0000},
    Journal = {International Journal of Engineering Research \& Innovation (IJERI)},
    Month = mar,
    Number = {2},
    Pages = {23--30},
    Title = {From Pit to Long Lie: A Fall-detection Algorithm for Smart Phones},
    Volume = {15},
    Year = {2015}}

  • T. Johnson and P. Seeling, “Browsing the mobile web: device, small cell, and distributed mobile caches,” in Proc. of ieee icc workshop on cooperative and cognitive networks (coconet7), London, United Kingdom, 2015, pp. 999-1003.
    [BibTeX] [Abstract]

    The increasing amounts of data requested by mobile client devices has given rise to broad research endeavors to determine how network providers can cope with this challenge. Based on real world data used to derive upper limits of web page complexity, we provide an evaluation of web browsing and localized caching approaches.. In this paper, we employ two different user browsing models for (i) individual mobile clients, (ii) mobile clients sharing one centralized small cell cache, and (iii) mobile clients operating in an energy-optimized co-located fashion. We find that for a given content popularity distribution, average group savings due to caching depend highly on the user model. Furthermore, we find that for the purpose of overall savings determinations, an aggregated virtual cache falls within less than ten percent of a more elaborate energy–conscious approach to caching.

    @inproceedings{Seel1506:Browsing,
    Abstract = {The increasing amounts of data requested by mobile client devices has given
    rise to broad research endeavors to determine how network providers can
    cope with this challenge. Based on real world data used to derive upper
    limits of web page complexity, we provide an evaluation of web browsing and
    localized caching approaches.. In this paper, we employ two different user
    browsing models for (i) individual mobile clients, (ii) mobile clients
    sharing one centralized small cell cache, and (iii) mobile clients
    operating in an energy-optimized co-located fashion. We find that for a
    given content popularity distribution, average group savings due to caching
    depend highly on the user model. Furthermore, we find that for the purpose
    of overall savings determinations, an aggregated virtual cache falls within
    less than ten percent of a more elaborate energy--conscious approach to
    caching.},
    Address = {London, United Kingdom},
    Author = {Troy Johnson and Patrick Seeling},
    Booktitle = {Proc. of IEEE ICC Workshop on Cooperative and Cognitive Networks (CoCoNet7)},
    Date-Added = {2015-04-07 16:42:45 +0000},
    Date-Modified = {2015-08-28 14:32:37 +0000},
    Days = 8,
    Keywords = {Mobile communications; Mobile cooperative applications; Cooperative communications; Green mobile communications},
    Month = jun,
    Pages = {999--1003},
    Title = {Browsing the Mobile Web: Device, Small Cell, and Distributed Mobile Caches},
    Year = 2015}

2014

  • P. Seeling, “An overview of energy savings potentials through mobile forwarding proxy framework,” International journal of ad hoc and ubiquitous computing, vol. 16, iss. 4, pp. 260-267, 2014.
    [BibTeX]
    @article{Se13a,
    Author = {Patrick Seeling},
    Date-Modified = {2014-12-27 14:21:08 +0000},
    Journal = {International Journal of Ad Hoc and Ubiquitous Computing},
    Keywords = {mobile},
    Month = sep,
    Number = {4},
    Owner = {seeli1p},
    Pages = {260--267},
    Timestamp = {2013.08.20},
    Title = {An Overview of Energy Savings Potentials Through Mobile Forwarding Proxy Framework},
    Volume = {16},
    Year = {2014}}

  • T. A. Johnson and P. Seeling, “Desktop and mobile web page comparison: characteristics, trends, and implications,” Ieee communications magazine, vol. 52, iss. 9, pp. 144-151, 2014.
    [BibTeX]
    @article{JoSe14a,
    Author = {Troy A. Johnson and Patrick Seeling},
    Date-Added = {2014-07-18 15:07:34 +0000},
    Date-Modified = {2014-09-03 14:16:21 +0000},
    Journal = {IEEE Communications Magazine},
    Month = sep,
    Number = 9,
    Pages = {144--151},
    Title = {Desktop and Mobile Web Page Comparison: Characteristics, Trends, and Implications},
    Volume = 52,
    Year = 2014}

  • M. Katz, D. E. Lucani, F. H. P. Fitzek, and P. Seeling, “Sharing resources locally and widely: mobile clouds as the building blocks of the shareconomy,” Ieee vehicular technology magazine, vol. 9, iss. 3, pp. 63-71, 2014.
    [BibTeX]
    @article{KaLuFiSe14,
    Author = {M. Katz and D. E. Lucani and F. H.P. Fitzek and P. Seeling},
    Journal = {IEEE Vehicular Technology Magazine},
    Month = sep,
    Number = 3,
    Pages = {63--71},
    Title = {Sharing Resources Locally and Widely: Mobile Clouds as the Building Blocks of the Shareconomy},
    Volume = 9,
    Year = 2014}

  • P. Seeling and M. Reisslein, “I. want. pixels. (entering the age of 4k),” Ieee potentials, vol. 33, iss. 6, pp. 27-30, 2014.
    [BibTeX]
    @article{SeRe14a,
    Author = {Patrick Seeling and Martin Reisslein},
    Date-Added = {2014-07-18 15:11:14 +0000},
    Date-Modified = {2014-12-27 14:20:56 +0000},
    Journal = {IEEE Potentials},
    Month = nov,
    Number = {6},
    Pages = {27--30},
    Title = {I. Want. Pixels. (Entering the Age of 4k)},
    Volume = {33},
    Year = {2014}}

  • Máté. Tömösközi, F. H. -P. Fitzek, D. E. Lucani, M. V. Pedersen, and P. Seeling, “On the delay characteristics for point–to–point links using random linear network coding with on–the–fly coding capabilities,” in Proc. of european wireless, 2014.
    [BibTeX]
    @inproceedings{TSeFi13,
    Author = {M\'{a}t\'{e} T\"{o}m\"{o}sk\"{o}zi and Frank H.-P. Fitzek and D. E. Lucani and M. V. Pedersen and Patrick Seeling},
    Booktitle = {Proc. of European Wireless},
    Date-Modified = {2014-12-27 14:21:30 +0000},
    Location = {Barcelona, Spain},
    Month = may,
    Owner = {seeli1p},
    Timestamp = {2013.12.13},
    Title = {On the Delay characteristics for Point--to--Point Links using Random Linear Network Coding with On--the--fly Coding Capabilities},
    Year = {2014}}

  • J. Lee and P. Seeling, “Mobile device-level data modeling through high utilization mobile applications,” in Proc. of the ieee consumer communications and networking conference (ccnc), Las Vegas, NV, USA, 2014, pp. 513-514.
    [BibTeX]
    @inproceedings{LeSe14,
    Address = {Las Vegas, NV, USA},
    Author = {Junghyo Lee and Patrick Seeling},
    Booktitle = {Proc. of the IEEE Consumer Communications and Networking Conference (CCNC)},
    Date-Modified = {2014-12-29 14:02:30 +0000},
    Month = jan,
    Owner = {seeli1p},
    Pages = {513--514},
    Timestamp = {2013.12.13},
    Title = {Mobile Device-Level Data Modeling Through High Utilization Mobile Applications},
    Year = {2014}}

  • T. Johnson and P. Seeling, “Power consumption overhead for proxy services on mobile device platforms,” in Proc. of the ieee consumer communications and networking conference (ccnc), Las Vegas, NV, USA, 2014, pp. 41-46.
    [BibTeX]
    @inproceedings{JoSe14,
    Address = {Las Vegas, NV, USA},
    Author = {Troy Johnson and Patrick Seeling},
    Booktitle = {Proc. of the IEEE Consumer Communications and Networking Conference (CCNC)},
    Date-Modified = {2014-12-29 14:02:47 +0000},
    Month = jan,
    Owner = {seeli1p},
    Pages = {41--46},
    Timestamp = {2013.12.13},
    Title = {Power Consumption Overhead for Proxy Services on Mobile Device Platforms},
    Year = {2014}}

  • P. Seeling and M. Reisslein, “Video traffic characteristics of modern encoding standards: h. 264/avc with svc and mvc extensions and h. 265/hevc,” The scientific world journal, vol. 2014, iss. Article ID 189481, pp. 1-16, 2014.
    [BibTeX]
    @article{SeRe14,
    Author = {Seeling, Patrick and Reisslein, Martin},
    Date-Added = {2014-04-07 15:57:55 +0000},
    Date-Modified = {2014-12-27 14:21:40 +0000},
    Journal = {The Scientific World Journal},
    Month = feb,
    Number = {Article ID 189481},
    Pages = {1--16},
    Title = {Video Traffic Characteristics of Modern Encoding Standards: H. 264/AVC with SVC and MVC Extensions and H. 265/HEVC},
    Volume = {2014},
    Year = {2014}}

  • T. A. Johnson and P. Seeling, “Web cache object forwarding from desktop to mobile for energy consumption optimizations,” in Proc. of ieee online conference on green communications (OnlineGreencomm), Tucson, AZ, USA, 2014, pp. 1-7.
    [BibTeX]
    @inproceedings{JoSe14b,
    Address = {Tucson, AZ, USA},
    Author = {Troy A. Johnson and Patrick Seeling},
    Booktitle = {Proc. of IEEE Online Conference on Green Communications ({OnlineGreencomm})},
    Date-Added = {2015-04-22 15:03:14 +0000},
    Date-Modified = {2015-08-28 14:33:41 +0000},
    Month = nov,
    Pages = {1--7},
    Title = {Web Cache Object Forwarding From Desktop to Mobile for Energy Consumption Optimizations},
    Year = {2014}}

2013

  • R. Haddad, M. McGarry, and P. Seeling, “Video bandwidth forecasting,” Ieee communications surveys and tutorials, vol. 15, iss. 4, pp. 1803-1818, 2013. doi:10.1109/SURV.2013.032213.00091
    [BibTeX] [Abstract]

    We survey twenty years of research literature on video frame size forecasting. We organize the discussion of the literature using model type and model parameters as a taxonomy. We discuss how to use video frame size forecasts to forecast video bandwidth requirements. We provide extensive comparisons of forecast accuracy among the various mechanisms using data extracted from the literature and a set of common experiments we conducted. Lastly, we summarize our findings with respect to forecast accuracy and we identify open areas for research.

    @article{HaMcSe13,
    Abstract = {We survey twenty years of research literature on video frame size
    forecasting. We organize the discussion of the literature using model
    type and model parameters as a taxonomy. We discuss how to use video
    frame size forecasts to forecast video bandwidth requirements. We
    provide extensive comparisons of forecast accuracy among the various
    mechanisms using data extracted from the literature and a set of
    common experiments we conducted. Lastly, we summarize our findings
    with respect to forecast accuracy and we identify open areas for
    research.},
    Author = {Haddad, R. and McGarry, M. and Seeling, P.},
    Date-Modified = {2014-03-20 09:54:51 +0000},
    Doi = {10.1109/SURV.2013.032213.00091},
    Issn = {1553-877X},
    Journal = {IEEE Communications Surveys and Tutorials},
    Keywords = {Bandwidth Forecasting;Bandwidth Prediction;Dynamic Bandwidth Allocation;Video Bandwidth Forecasting;Video Bandwidth Prediction;Video Forecasting;Video Prediction},
    Month = {{Fourth Quarter}},
    Number = {4},
    Pages = {1803--1818},
    Title = {Video Bandwidth Forecasting},
    Volume = {15},
    Year = {2013},
    Bdsk-Url-1 = {http://dx.doi.org/10.1109/SURV.2013.032213.00091}}

  • C. Sulisz, T. Johnson, and P. Seeling, “Video characteristics of mobile videos on android devices: initial results,” in Proc. of the ieee international conference on electro/information technology (eit), Rapid City, SD, USA, 2013, pp. 1-6.
    [BibTeX]
    @inproceedings{SuJoSe13,
    Address = {Rapid City, SD, USA},
    Author = {Christopher Sulisz and Troy Johnson and Patrick Seeling},
    Booktitle = {Proc. of the IEEE International Conference on Electro/Information Technology (EIT)},
    Date-Modified = {2014-12-29 13:57:46 +0000},
    Month = may,
    Owner = {seeli1p},
    Pages = {1--6},
    Timestamp = {2013.04.26},
    Title = {Video Characteristics of Mobile Videos on Android Devices: Initial Results},
    Year = {2013}}

  • J. Lee and P. Seeling, “An overview of mobile device network traffic and network interface usage patterns,” in Proc. of the ieee international conference on electro/information technology (eit), Rapid City, SD, USA, 2013, pp. 1-5.
    [BibTeX] [Abstract]

    In this paper, we present and evaluate the outcomes of a measurement study amongst Android mobile device users, who volunteered their device-level network activity data through a newly developed mobile application in January 2013. We evaluate the submitted data in two hour time intervals with respect to device-level network traffic amounts, application network activity times, and data distribution (as measure of connectivity) between mobile (cellular) and wireless LAN networks. We find fairly homogeneous values with low levels of autocorrelation or long range dependence for the device-level amounts of data, but an indication for self-similarity for the summed application network usage times, which are positively correlated. In addition, we observe that the average distribution for cellular interface usage exhibits clear patterns for the day of the week as well as the time of the day. The combination of these findings can find direct utilization in future mobile device utilization modeling efforts.

    @inproceedings{LeSe13,
    Abstract = {In this paper, we present and evaluate the outcomes of a measurement
    study amongst Android mobile device users, who volunteered their
    device-level network activity data through a newly developed mobile
    application in January 2013. We evaluate the submitted data in two
    hour time intervals with respect to device-level network traffic
    amounts, application network activity times, and data distribution
    (as measure of connectivity) between mobile (cellular) and wireless
    LAN networks. We find fairly homogeneous values with low levels of
    autocorrelation or long range dependence for the device-level amounts
    of data, but an indication for self-similarity for the summed application
    network usage times, which are positively correlated. In addition,
    we observe that the average distribution for cellular interface usage
    exhibits clear patterns for the day of the week as well as the time
    of the day. The combination of these findings can find direct utilization
    in future mobile device utilization modeling efforts.},
    Address = {Rapid City, SD, USA},
    Author = {Junghyo Lee and Patrick Seeling},
    Booktitle = {Proc. of the IEEE International Conference on Electro/Information Technology (EIT)},
    Date-Modified = {2014-12-29 16:02:34 +0000},
    Month = may,
    Owner = {seeli1p},
    Pages = {1--5},
    Timestamp = {2013.04.26},
    Title = {An Overview of Mobile Device Network Traffic and Network Interface Usage Patterns},
    Year = {2013},
    Bdsk-Url-1 = {http://patrick.seeling.org/publication-pdfs/cnf/LeSe13.pdf}}

  • P. Seeling, “Caching proxying for mobile users,” in Proc. of the ieee vehicular technology conference (vtc), Dresden, Germany, 2013, pp. 1-5.
    [BibTeX] [Abstract]

    In this paper, we introduce a caching proxy architecture, which is used to (i) enable seamless device switching in the increasingly connected mobile user space, (ii) create userbased application optimizations, and (iii) realize energy savings in application contexts. We provide an overview of the static long-term gains that can be expected for individual applications using a generic cost approach and present numerical evaluations for the impact of different performance factors. We find that significant optimization potentials exist for cases of negligible computational overheads (i) downstream from the proxy if even small savings around 5% from the proxy downstream can be realized and (ii) upstream from the proxy if data needs to be replicated on the mobile user end in current multiple device scenarios.

    @inproceedings{Se13,
    Abstract = {In this paper, we introduce a caching proxy architecture, which is
    used to (i) enable seamless device switching in the increasingly
    connected mobile user space, (ii) create userbased application optimizations,
    and (iii) realize energy savings in application contexts. We provide
    an overview of the static long-term gains that can be expected for
    individual applications using a generic cost approach and present
    numerical evaluations for the impact of different performance factors.
    We find that significant optimization potentials exist for cases of
    negligible computational overheads (i) downstream from the proxy
    if even small savings around 5% from the proxy downstream can be
    realized and (ii) upstream from the proxy if data needs to be replicated
    on the mobile user end in current multiple device scenarios.},
    Address = {Dresden, Germany},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of the IEEE Vehicular Technology Conference (VTC)},
    Date-Modified = {2014-12-29 16:03:12 +0000},
    Keywords = {mobile},
    Month = jun,
    Owner = {seeli1p},
    Pages = {1--5},
    Timestamp = {2013.06.17},
    Title = {Caching Proxying for Mobile Users},
    Year = {2013},
    Bdsk-Url-1 = {http://patrick.seeling.org/publication-pdfs/cnf/Se13.pdf}}

  • T. A. Johnson and P. Seeling, “Mobile node localization using cooperation and static beacons,” in Proc. of 5th ieee workshop on cooperative and cognitive mobile networks (coconet), Budapest, Hungary, 2013.
    [BibTeX] [Abstract] [Download PDF]

    Location-based services are one of the demanding applications on mobile devices that account for significant battery usage. In this paper, we evaluate the potential average savings over using approaches such as GPS for localization that can be achieved by (i) using local low-energy mobile node cooperation and/or (ii) additional local infrastructure (fixed) beacon nodes that broadcast their position. Using a random walk simulation approach, we find that significant savings could be attainable; we determine above 20% for 50 nodes in a 100×100 area in the presence of beacons and 18% without. We additionally note that the simulated nodes are able to determine their location fairly accurately within the simulated area. We finally observe that random background refreshes (such as those triggered by other applications) have only little impact on the potential for savings.

    @inproceedings{JoSe13,
    Abstract = {Location-based services are one of the demanding applications on mobile
    devices that account for significant battery usage. In this paper,
    we evaluate the potential average savings over using approaches such
    as GPS for localization that can be achieved by (i) using local low-energy
    mobile node cooperation and/or (ii) additional local infrastructure
    (fixed) beacon nodes that broadcast their position. Using a random
    walk simulation approach, we find that significant savings could
    be attainable; we determine above 20% for 50 nodes in a 100x100 area
    in the presence of beacons and 18% without. We additionally note
    that the simulated nodes are able to determine their location fairly
    accurately within the simulated area. We finally observe that random
    background refreshes (such as those triggered by other applications)
    have only little impact on the potential for savings.},
    Address = {Budapest, Hungary},
    Author = {Troy A. Johnson and Patrick Seeling},
    Booktitle = {Proc. of 5th IEEE Workshop on Cooperative and Cognitive Mobile Networks (CoCoNet)},
    Date-Modified = {2014-12-27 14:23:53 +0000},
    Month = jun,
    Owner = {seeli1p},
    Timestamp = {2013.06.17},
    Title = {Mobile Node Localization Using Cooperation and Static Beacons},
    Url = {http://patrick.seeling.org/publication-pdfs/cnf/JoSe13.pdf},
    Year = {2013},
    Bdsk-Url-1 = {http://patrick.seeling.org/publication-pdfs/cnf/JoSe13.pdf}}

  • Máté. Tömösközi, P. Seeling, and F. H. -P. Fitzek, “Performance evaluation and comparison of robust header compression (rohc) rohcv1 and rohcv2 for multimedia delivery,” in Proc. of ieee globecom 2013 workshop – control techniques for efficient multimedia delivery (ctemd), Atlanta, GA, USA, 2013.
    [BibTeX]
    @inproceedings{ToSeFi13,
    Address = {Atlanta, GA, USA},
    Author = {M\'{a}t\'{e} T\"{o}m\"{o}sk\"{o}zi and Patrick Seeling and Frank H.-P. Fitzek},
    Booktitle = {Proc. of IEEE Globecom 2013 Workshop - Control Techniques for Efficient Multimedia Delivery (CTEMD)},
    Date-Modified = {2014-12-29 14:03:02 +0000},
    Month = dec,
    Owner = {seeli1p},
    Timestamp = {2013.12.13},
    Title = {Performance Evaluation and Comparison of RObust Header Compression (ROHC) ROHCv1 and ROHCv2 for Multimedia Delivery},
    Year = {2013}}

  • A. Pulipaka, P. Seeling, M. Reisslein, and L. J. Karam, “Traffic and statistical multiplexing characterization of 3-d video representation formats,” Broadcasting, ieee transactions on, vol. 59, iss. 2, pp. 382-389, 2013. doi:10.1109/TBC.2013.2244792
    [BibTeX]
    @article{PuSeReKa13,
    Author = {Pulipaka, A. and Seeling, P. and Reisslein, M. and Karam, L.J.},
    Date-Added = {2015-03-26 19:20:31 +0000},
    Date-Modified = {2015-03-26 19:20:51 +0000},
    Doi = {10.1109/TBC.2013.2244792},
    Issn = {0018-9316},
    Journal = {Broadcasting, IEEE Transactions on},
    Keywords = {distortion;image representation;statistical analysis;telecommunication traffic;video coding;video signal processing;3D video representation formats;FS representation;MV representation;SBS representation;bitrate variability-distortion;encoding;frame sequential representation;multiview video representation;network transport;side-by-side representation;single-view video;statistical multiplexing characterization;traffic;3D video;rate-distortion characterization;smoothing;traffic variability;video streaming},
    Month = {June},
    Number = {2},
    Pages = {382-389},
    Title = {Traffic and Statistical Multiplexing Characterization of 3-D Video Representation Formats},
    Volume = {59},
    Year = {2013},
    Bdsk-Url-1 = {http://dx.doi.org/10.1109/TBC.2013.2244792}}

2012

  • R. Gupta, A. Pulipaka, P. Seeling, L. J. Karam, and M. Reisslein, “H.264 coarse grain scalable (cgs) and medium grain scalable (mgs) encoded video: a trace based traffic and quality evaluation,” Ieee transactions on broadcasting, 2012.
    [BibTeX]
    @article{GuPuSeKaRe12,
    Author = {Rohan Gupta and Akshay Pulipaka and Patrick Seeling and Lina J. Karam and Martin Reisslein},
    Date = sep,
    Journal = {IEEE Transactions on Broadcasting},
    Journaltitle = {IEEE Transactions on Broadcasting},
    Month = sep,
    Owner = {seeli1p},
    Timestamp = {2012.03.23},
    Title = {H.264 Coarse Grain Scalable (CGS) and Medium Grain Scalable (MGS) Encoded Video: A Trace Based Traffic and Quality Evaluation},
    Year = {2012}}

  • P. Seeling, “Hybrid and secure scheme for pre-ordered video delivery over low-bandwidth links,” in Proc. of the ieee international conference on electro/information technology (eit), Indianapolis, IN, USA, 2012, pp. 1-4.
    [BibTeX] [Abstract]

    Despite efforts to increase access to broadband Internet services nationally and globally, a large number of households remains connected using lower bandwidth connections. At the same time, however, a connected household’s demands for data services (including the typical triple-play services) increases continuously. One of the main drivers in the triple-play service domain is Video-on-Demand (VoD). VoD services today mix realtime streaming (or watching) of content with pre-selection and personal library-building for later consumption. In this contribution, we evaluate the extensive caching of video sequences that were pre-ordered (e.g., added to a personal library with a VoD service provider) under the constraints of low-bandwidth links commonly encountered in rural communities. We find that by combining extensive client-side caching, video coding patterns, and stream-level smoothing at the time of media consumption, our approach enables the delivery of full HD resolution content to connections under 1 Mbps given enough time for pre-caching. Additionally, utilizing the inter-frame dependencies and coding properties of H.264/AVC encodings, our approach disables broad decoding of content from the client-side cache and hence preserves copyrights.

    @inproceedings{Se12,
    Abstract = {Despite efforts to increase access to broadband Internet services
    nationally and globally, a large number of households remains connected
    using lower bandwidth connections. At the same time, however, a connected
    household's demands for data services (including the typical triple-play
    services) increases continuously. One of the main drivers in the
    triple-play service domain is Video-on-Demand (VoD). VoD services
    today mix realtime streaming (or watching) of content with pre-selection
    and personal library-building for later consumption. In this contribution,
    we evaluate the extensive caching of video sequences that were pre-ordered
    (e.g., added to a personal library with a VoD service provider) under
    the constraints of low-bandwidth links commonly encountered in rural
    communities. We find that by combining extensive client-side caching,
    video coding patterns, and stream-level smoothing at the time of
    media consumption, our approach enables the delivery of full HD resolution
    content to connections under 1 Mbps given enough time for pre-caching.
    Additionally, utilizing the inter-frame dependencies and coding properties
    of H.264/AVC encodings, our approach disables broad decoding of content
    from the client-side cache and hence preserves copyrights.},
    Address = {Indianapolis, IN, USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of the IEEE International Conference on Electro/Information Technology (EIT)},
    Date-Modified = {2014-12-29 13:57:16 +0000},
    Month = may,
    Pages = {1--4},
    Title = {Hybrid and secure scheme for pre-ordered video delivery over low-bandwidth links},
    Year = {2012}}

  • M. McGarry, P. Seeling, R. Haddad, and J. Hernandez, “Accuracy of video frame size forecasting,” in Proc. of the ieee international conference on electro/information technology (eit), Indianapolis, IN, USA, 2012, pp. 1-5.
    [BibTeX] [Abstract]

    We experimentally explore the forecast accuracy of three forecast model types, namely (i) Auto-Regressive (AR), (ii) Moving Average (MA), and (iii) Exponentially Weighted Moving Average (EWMA). Specifically, we use a set of five MPEG-4 video traces and measure the Normalized Mean Squared Error (NMSE) for each of the model types with varying model parameters. We find that increasing model order is not beneficial for I and P frame size forecasting, but is beneficial to B frame size forecasting. Most importantly, we find that the forecast accuracy has the strongest dependence on the statistical properties of the video content itself. It appears that the forecast accuracy is not dependent on the forecast model properties but rather strictly dependent on the logical and statistical properties of the content.

    @inproceedings{McSeHaHe12,
    Abstract = {We experimentally explore the forecast accuracy of three forecast
    model types, namely (i) Auto-Regressive (AR), (ii) Moving Average
    (MA), and (iii) Exponentially Weighted Moving Average (EWMA). Specifically,
    we use a set of five MPEG-4 video traces and measure the Normalized
    Mean Squared Error (NMSE) for each of the model types with varying
    model parameters. We find that increasing model order is not beneficial
    for I and P frame size forecasting, but is beneficial to B frame
    size forecasting. Most importantly, we find that the forecast accuracy
    has the strongest dependence on the statistical properties of the
    video content itself. It appears that the forecast accuracy is not
    dependent on the forecast model properties but rather strictly dependent
    on the logical and statistical properties of the content.},
    Address = {Indianapolis, IN, USA},
    Author = {Michael McGarry and Patrick Seeling and Rami Haddad and Jesus Hernandez},
    Booktitle = {Proc. of the IEEE International Conference on Electro/Information Technology (EIT)},
    Date-Modified = {2014-12-29 13:57:25 +0000},
    Month = may,
    Pages = {1--5},
    Title = {Accuracy of Video Frame Size Forecasting},
    Year = {2012}}

  • T. A. Johnson and P. Seeling, “Localization using bluetooth device names,” in Proc. of the thirteenth acm international symposium on mobile ad hoc networking and computing, Hilton Head, South Carolina, USA, 2012, pp. 247-248. doi:10.1145/2248371.2248408
    [BibTeX]
    @inproceedings{JoSe12,
    Address = {Hilton Head, South Carolina, USA},
    Author = {Troy A. Johnson and Patrick Seeling},
    Booktitle = {Proc. of the thirteenth ACM international symposium on Mobile Ad Hoc Networking and Computing},
    Date-Modified = {2014-12-29 14:01:51 +0000},
    Doi = {10.1145/2248371.2248408},
    Keywords = {bluetooth; localization},
    Month = jun,
    Pages = {247--248},
    Title = {Localization using bluetooth device names},
    Year = {2012},
    Bdsk-Url-1 = {http://doi.acm.org/10.1145/2248371.2248408},
    Bdsk-Url-2 = {http://dx.doi.org/10.1145/2248371.2248408}}

  • C. Sulisz and P. Seeling, “An off-the-shelf wearable hud system for support in indoor environments,” in Proc. of the 11th international conference on mobile and ubiquitous multimedia, Ulm, Germany, 2012, p. 60:1–60:4. doi:10.1145/2406367.2406439
    [BibTeX]
    @inproceedings{SuSe12,
    Address = {Ulm, Germany},
    Author = {Sulisz, C. and Seeling, P.},
    Booktitle = {Proc. of the 11th International Conference on Mobile and Ubiquitous Multimedia},
    Date-Modified = {2014-12-29 14:07:16 +0000},
    Doi = {10.1145/2406367.2406439},
    Keywords = {Android, NFC, assisted living, augmented reality},
    Month = jan,
    Pages = {60:1--60:4},
    Title = {An off-the-shelf wearable HUD system for support in indoor environments},
    Year = {2012},
    Bdsk-Url-1 = {http://doi.acm.org/10.1145/2406367.2406439},
    Bdsk-Url-2 = {http://dx.doi.org/10.1145/2406367.2406439}}

  • A. Pulipaka, P. Seeling, and M. Reisslein, “Traffic models for h.264 video using hierarchical prediction structures,” in Ieee global communications conference (globecom), Anaheim, CA, USA, 2012.
    [BibTeX]
    @inproceedings{PuSeRe12,
    Address = {Anaheim, CA, USA},
    Author = {Akshay Pulipaka and Patrick Seeling and Martin Reisslein},
    Booktitle = {IEEE Global Communications Conference (GLOBECOM)},
    Month = dec,
    Owner = {seeli1p},
    Timestamp = {2012.12.10},
    Title = {Traffic Models for H.264 Video Using Hierarchical Prediction Structures},
    Year = {2012}}

  • P. Seeling and M. Reisslein, “Video trace evaluation with h.264 video traces,” Ieee communications surveys & tutorials, vol. 4, iss. 14, pp. 1142-1165, 2012.
    [BibTeX] [Abstract] [Download PDF]

    The performance evaluation of video transport mechanisms becomes increasingly important as encoded video accounts for growing portions of the network traffic. Compared to the widely studied MPEG-4 encoded video, the recently adopted H.264 video coding standards include novel mechanisms, such as hierarchical B frame prediction structures and highly efficient quality scalable coding, that have important implications for network transport. This tutorial introduces a trace-based evaluation methodology for the network transport of H.264 encoded video. We first give an overview of H.264 video coding, and then present the trace structures for capturing the characteristics of H.264 encoded video. We give an overview of the typical video traffic and quality characteristics of H.264 encoded video. Finally, we explain how to account for the H.264 specific coding mechanisms, such as hierarchical B frames, in networking studies.

    @article{SeRe12,
    Abstract = {The performance evaluation of video transport mechanisms becomes increasingly
    important as encoded video accounts for growing portions of the network
    traffic. Compared to the widely studied MPEG-4 encoded video, the
    recently adopted H.264 video coding standards include novel mechanisms,
    such as hierarchical B frame prediction structures and highly efficient
    quality scalable coding, that have important implications for network
    transport. This tutorial introduces a trace-based evaluation methodology
    for the network transport of H.264 encoded video. We first give an
    overview of H.264 video coding, and then present the trace structures
    for capturing the characteristics of H.264 encoded video. We give
    an overview of the typical video traffic and quality characteristics
    of H.264 encoded video. Finally, we explain how to account for the
    H.264 specific coding mechanisms, such as hierarchical B frames,
    in networking studies.},
    Author = {Patrick Seeling and Martin Reisslein},
    Journal = {IEEE Communications Surveys \& Tutorials},
    Month = {4 Quarter},
    Number = {14},
    Pages = {1142--1165},
    Title = {Video Trace Evaluation With H.264 Video Traces},
    Url = {http://patrick.seeling.org/publication-pdfs/jrn/H264VidTraceTut.pdf},
    Volume = {4},
    Year = {2012},
    Bdsk-Url-1 = {http://patrick.seeling.org/publication-pdfs/jrn/H264VidTraceTut.pdf}}

  • M. Oner, J. A. Pulcifer-Stump, P. Seeling, and T. Kaya, “Towards the run and walk activity classification through step detection – an android application,” in Proc. of the 34th annual international conference of the ieee engineering in medicine and biology society (embs), San Diego, CA, USA, 2012.
    [BibTeX] [Abstract]

    Falling is one of the most common accidents with potentially irreversible consequences, especially considering special groups, such as the elderly or disabled. One approach to solve this issue would be an early detection of the falling event. Towards reaching the goal of early fall detection, we have worked on distinguishing and monitoring some basic human activities such as walking and running. Since we plan to implement the system mostly for seniors and the disabled, simplicity of the usage becomes very important. We have successfully implemented an algorithm that would not require the acceleration sensor to be fixed in a specific position (the smart phone itself in our application), whereas most of the previous research dictates the sensor to be fixed in a certain direction. This algorithm reviews data from the accelerometer to determine if a user has taken a step or not and keeps track of the total amount of steps. After testing, the algorithm was more accurate than a commercial pedometer in terms of comparing outputs to the actual number of steps taken by the user.

    @inproceedings{OnPuSeKa12,
    Abstract = {Falling is one of the most common accidents with potentially irreversible
    consequences, especially considering special groups, such as the
    elderly or disabled. One approach to solve this issue would be an
    early detection of the falling event. Towards reaching the goal of
    early fall detection, we have worked on distinguishing and monitoring
    some basic human activities such as walking and running. Since we
    plan to implement the system mostly for seniors and the disabled,
    simplicity of the usage becomes very important.
    We have successfully implemented an algorithm that would not require
    the acceleration sensor to be fixed in a specific position (the smart
    phone itself in our application), whereas most of the previous research
    dictates the sensor to be fixed in a certain direction. This algorithm
    reviews data from the accelerometer to determine if a user has taken
    a step or not and keeps track of the total amount of steps. After
    testing, the algorithm was more accurate than a commercial pedometer
    in terms of comparing outputs to the actual number of steps taken
    by the user.},
    Address = {San Diego, CA, USA},
    Author = {Melis Oner and Jeffry A. Pulcifer-Stump and Patrick Seeling and Tolga Kaya},
    Booktitle = {Proc. of the 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS)},
    Date-Modified = {2014-12-29 14:05:38 +0000},
    Month = aug,
    Owner = {seeli1p},
    Timestamp = {2012.09.11},
    Title = {Towards the Run and Walk Activity Classification through Step Detection - An Android Application},
    Year = {2012}}

  • C. Sulisz, T. Johnson, and P. Seeling, Mobile video parser, 2012.
    [BibTeX] [Download PDF]
    @misc{SuJoSe12,
    Author = {Chris Sulisz and Troy Johnson and Patrick Seeling},
    Owner = {seeli1p},
    Timestamp = {2012.07.11},
    Title = {Mobile Video Parser},
    Url = {https://play.google.com/store/apps/details?id=com.VideoParser#?t=W251bGwsMSwxLDIxMiwiY29tLlZpZGVvUGFyc2VyIl0},
    Year = {2012},
    Bdsk-Url-1 = {https://play.google.com/store/apps/details?id=com.VideoParser#?t=W251bGwsMSwxLDIxMiwiY29tLlZpZGVvUGFyc2VyIl0}}

2011

  • A. Ellertson and P. Seeling, “Work in progress – using mobile & social game technology with location-based services for building learning communities,” in Proc. of the asee/ieee frontiers in education conference (FIE), Rapid City, SD, USA, 2011, p. S4H–1–S4H–3.
    [BibTeX] [Abstract]

    In this Work in Progress, we describe the my Learning Community application design principles and theoretical foundation. The application is a learning community support tool, which we implement in a peer mentoring project in the Department of Computing and New Media Technologies at the University of Wisconsin-Stevens Point. Combining different learning frameworks, we implement location-based services utilizing publicly available interfaces to Foursquare/Gowalla, which allow the identification and tracking of student participation in study sessions and identification of experts (mayors), which in turn mentor fellow students. As students progress through the curriculum, the identified student participation will allow for a transition of students into informal topic leadership. The student and study group location and additional communication among participants of study sessions will be facilitated by the my Learning Community application, which we make available to our students for installation on mobile and desktop devices and are currently implementing our approach.

    @inproceedings{ElSe11,
    Abstract = {In this Work in Progress, we describe the my Learning Community application
    design principles and theoretical foundation. The application is
    a learning community support tool, which we implement in a peer mentoring
    project in the Department of Computing and New Media Technologies
    at the University of Wisconsin-Stevens Point. Combining different
    learning frameworks, we implement location-based services utilizing
    publicly available interfaces to Foursquare/Gowalla, which allow
    the identification and tracking of student participation in study
    sessions and identification of experts (mayors), which in turn mentor
    fellow students. As students progress through the curriculum, the
    identified student participation will allow for a transition of students
    into informal topic leadership. The student and study group location
    and additional communication among participants of study sessions
    will be facilitated by the my Learning Community application, which
    we make available to our students for installation on mobile and
    desktop devices and are currently implementing our approach.},
    Address = {Rapid City, SD, USA},
    Author = {Anthony Ellertson and Patrick Seeling},
    Booktitle = {Proc. of the ASEE/IEEE Frontiers in Education Conference ({FIE})},
    Date-Modified = {2014-12-29 13:56:35 +0000},
    Month = oct,
    Pages = {S4H--1--S4H--3},
    Title = {Work in Progress - Using Mobile \& Social Game Technology with Location-based Services for Building Learning Communities},
    Year = {2011}}

  • P. Seeling, “Network performance evaluation of microsoft office communications server 2007,” in Proc. of the ieee international conference on electro/information technology (eit), Mankato, MN, USA, 2011.
    [BibTeX] [Abstract]

    Instant multimedia communication has moved into mainstream application scenarios and is used in various settings. Dimensioning future networks into which these solutions are integrated requires knowledge of the underlying traffic characteristics of these systems. Here we present findings for the Microsoft Office Communication Server deployed at a midsize educational institution in the upper Midwest. We find that different individual bandwidth utilizing classes of communication clients or endpoints can be identified that shape the overall server traffic significantly and range from self-similar to random bandwidth utilization patterns over time. Using our initial findings presented here allows for future network capacity planning and bandwidth utilization modeling before deployment of this and similar solutions.

    @inproceedings{Se11,
    Abstract = {Instant multimedia communication has moved into mainstream application
    scenarios and is used in various settings. Dimensioning future networks
    into which these solutions are integrated requires knowledge of the
    underlying traffic characteristics of these systems. Here we present
    findings for the Microsoft Office Communication Server deployed at
    a midsize educational institution in the upper Midwest. We find that
    different individual bandwidth utilizing classes of communication
    clients or endpoints can be identified that shape the overall server
    traffic significantly and range from self-similar to random bandwidth
    utilization patterns over time. Using our initial findings presented
    here allows for future network capacity planning and bandwidth utilization
    modeling before deployment of this and similar solutions.},
    Address = {Mankato, MN, USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of the IEEE International Conference on Electro/Information Technology (EIT)},
    Date-Modified = {2014-12-29 13:58:46 +0000},
    Month = may,
    Title = {Network Performance Evaluation of Microsoft Office Communications Server 2007},
    Year = {2011}}

  • S. Haase and P. Seeling, “Sockx – an application layer network switching framework using socksv5 protocol extensions,” in Proc. of the ieee international conference on electro/information technology (eit), Mankato, MN, USA, 2011.
    [BibTeX] [Abstract]

    In this paper, we introduce and evaluate the SOCKx framework, which extends the widely used SOCKSv5 protocol to enable application-layer switching between multiple networks. Through application-layer selection of available underlying networks, a client’s proxy server can dynamically adjust the network to be used for transmissions, e.g., to optimize power consumption, when communicating with a remote proxy server. From a general performance evaluation for cellular-controlled converged devices, we find that switching between different networks does not always present a viable option for power savings and depends on (i) the computational overhead of the server implementation, (ii) the type of network traffic under consideration and (iii) the ability of switching off unused network interfaces.

    @inproceedings{HaSe11,
    Abstract = {In this paper, we introduce and evaluate the SOCKx framework, which
    extends the widely used SOCKSv5 protocol to enable application-layer
    switching between multiple networks. Through application-layer selection
    of available underlying networks, a client's proxy server can dynamically
    adjust the network to be used for transmissions, e.g., to optimize
    power consumption, when communicating with a remote proxy server.
    From a general performance evaluation for cellular-controlled converged
    devices, we find that switching between different networks does not
    always present a viable option for power savings and depends on (i)
    the computational overhead of the server implementation, (ii) the
    type of network traffic under consideration and (iii) the ability
    of switching off unused network interfaces.},
    Address = {Mankato, MN, USA},
    Author = {Steffen Haase and Patrick Seeling},
    Booktitle = {Proc. of the IEEE International Conference on Electro/Information Technology (EIT)},
    Date-Modified = {2014-12-29 13:58:50 +0000},
    Month = may,
    Title = {SOCKx - An Application Layer Network Switching Framework using SOCKSv5 Protocol Extensions},
    Year = {2011}}

  • A. Sharma and P. Seeling, “Store-and-forward in high traffic sensor networks,” in Proc. of the computer science online conference (csoc), 2011.
    [BibTeX] [Abstract]

    In this paper, we evaluate the impact of different numbers of nodes and their probability of sending data in an IEEE802.15.4 star topology sensor network where several background nodes attempt to communicate their sensor readings while a foreground node is required to send larger amounts of data, e.g., a low-resolution or low-frame rate video stream, to the sink of the local network. For such scenario, it might be beneficial to adapt a store-and-forward transmission strategy, which can be implemented by switching the utilized wireless channel. We provide an overview of the available channel bandwidth calculations and derive the maximum allowable times that switching between different channels is allowed to take if the foreground node and the local sink node were to switch channels to allow exclusive streaming of data. We find that for a generalized scenario with high traffic in the network, switching times of around 7s are allowable, which should fall within realistic ranges to expect.

    @inproceedings{ShSe11,
    Abstract = {In this paper, we evaluate the impact of different numbers of nodes
    and their probability of sending data in an IEEE802.15.4 star topology
    sensor network where several background nodes attempt to communicate
    their sensor readings while a foreground node is required to send
    larger amounts of data, e.g., a low-resolution or low-frame rate
    video stream, to the sink of the local network. For such scenario,
    it might be beneficial to adapt a store-and-forward transmission
    strategy, which can be implemented by switching the utilized wireless
    channel. We provide an overview of the available channel bandwidth
    calculations and derive the maximum allowable times that switching
    between different channels is allowed to take if the foreground node
    and the local sink node were to switch channels to allow exclusive
    streaming of data. We find that for a generalized scenario with high
    traffic in the network, switching times of around 7s are allowable,
    which should fall within realistic ranges to expect.},
    Author = {Ambud Sharma and Patrick Seeling},
    Booktitle = {Proc. of the Computer Science Online Conference (CSOC)},
    Month = jan,
    Title = {Store-and-Forward in High Traffic Sensor Networks},
    Year = {2011}}

  • P. Seeling, “Power consumption evaluation for cooperative localization services,” in Proc. of the international joint conferences on computer, information, and systems sciences, and engineering (cisse), Online, 2011, pp. 1-5.
    [BibTeX] [Abstract]

    Current mobile applications oftentimes require power-consuming localization services. In this paper, we outline the co-localization approach, where nodes share their location with peers, enabling a reduction in the costs of localization when a precise location fix is desired. While several works in this domain compare the accuracy of localization techniques in cooperative scenarios, we focus our evaluation on the power consumption and accuracy that can be achieved. We present a first model and evaluation using statistics and traces derived from two human mobility models. We find that for 15 minute intervals of location requests, a cooperative localization approach can reduce the costs associated with localization if half of the nodal peer encounters are with location-sharing nodes and GPS is usable about half the time.

    @inproceedings{Se11a,
    Abstract = {Current mobile applications oftentimes require power-consuming localization
    services. In this paper, we outline the co-localization approach,
    where nodes share their location with peers, enabling a reduction
    in the costs of localization when a precise location fix is desired.
    While several works in this domain compare the accuracy of localization
    techniques in cooperative scenarios, we focus our evaluation on the
    power consumption and accuracy that can be achieved. We present a
    first model and evaluation using statistics and traces derived from
    two human mobility models. We find that for 15 minute intervals of
    location requests, a cooperative localization approach can reduce
    the costs associated with localization if half of the nodal peer
    encounters are with location-sharing nodes and GPS is usable about
    half the time.},
    Address = {Online},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of the International Joint Conferences on Computer, Information, and Systems Sciences, and Engineering (CISSE)},
    Date-Modified = {2014-12-29 13:56:48 +0000},
    Month = dec,
    Pages = {1--5},
    Title = {Power Consumption Evaluation for Cooperative Localization Services},
    Year = {2011}}

2010

  • P. Seeling, F. H. P. Fitzek, G. Ertli, A. Pulipaka, and M. Reisslein, “Video network traffic and quality comparison of vp8 and h.264 svc,” in Proc. of the acm multimedia 2010 workshop – mobile video delivery (MoViD), Florence, Italy, 2010.
    [BibTeX] [Abstract]

    Google has recently released the video compression format VP8 to the open source community. This new compression format competes against the existing H.264 video standard developed by the ITU-T Video Coding Experts Group (VCEG) in collaboration with the ISO/IEC Moving Picture Experts Group (MPEG). This paper compares these two video coding standards in terms of video bit rate-distortion (quality) performance and the video network traffic variability with different long video sequences. We find that VP8 presently does not fulfill its promise to achieve twice the quality at half the bandwidth compared to H.264. The rate-distortion (RD) performance of VP8 is rather slightly below the RD performance of H.264. On the positive side, in contrast to H.264, VP8 has no license fees.

    @inproceedings{SeFiErPuRe10,
    Abstract = {Google has recently released the video compression format VP8 to the
    open source community. This new compression format competes against
    the existing H.264 video standard developed by the ITU-T Video Coding
    Experts Group (VCEG) in collaboration with the ISO/IEC Moving Picture
    Experts Group (MPEG). This paper compares these two video coding
    standards in terms of video bit rate-distortion (quality) performance
    and the video network traffic variability with different long video
    sequences. We find that VP8 presently does not fulfill its promise
    to achieve twice the quality at half the bandwidth compared to H.264.
    The rate-distortion (RD) performance of VP8 is rather slightly below
    the RD performance of H.264. On the positive side, in contrast to
    H.264, VP8 has no license fees.},
    Address = {Florence, Italy},
    Author = {Patrick Seeling and Frank H.P. Fitzek and Gergo Ertli and Akshay Pulipaka and Martin Reisslein},
    Booktitle = {Proc. of the ACM Multimedia 2010 Workshop - Mobile Video Delivery ({MoViD})},
    Date-Modified = {2014-12-29 14:06:36 +0000},
    Month = oct,
    Title = {Video Network Traffic and Quality Comparison of VP8 and H.264 SVC},
    Year = {2010}}

  • P. Seeling, “Work-in-progress: portable student lab implementation,” in Proc. of the asee/ieee frontiers in education conference (FIE), Washington, D.C., USA, 2010, p. F2F-1–F2F-3.
    [BibTeX]
    @inproceedings{Se10,
    Address = {Washington, D.C., USA},
    Author = {Patrick Seeling},
    Booktitle = {Proc. of the ASEE/IEEE Frontiers in Education Conference ({FIE})},
    Date-Modified = {2014-12-29 13:59:12 +0000},
    Month = oct,
    Pages = {F2F-1--F2F-3},
    Title = {Work-In-Progress: Portable Student Lab Implementation},
    Year = {2010}}

  • P. Seeling, “Web conferencing traffic – an analysis using dimdim as example,” International journal of computer networks and communications, vol. 2, iss. 6, pp. 1-11, 2010.
    [BibTeX]
    @article{Se10a,
    Author = {Patrick Seeling},
    Journal = {International Journal of Computer Networks and Communications},
    Month = nov,
    Number = {6},
    Pages = {1--11},
    Title = {Web Conferencing Traffic - An Analysis using DimDim as Example},
    Volume = {2},
    Year = {2010}}

  • A. Pulipaka, P. Seeling, M. Reisslein, and L. J. Karam, “Overview and traffic characterization of coarse-grain quality scalable (cgs) h.264 svc encoded video,” in Proc. of the ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2010.
    [BibTeX] [Abstract]

    The scalable video coding extension (SVC) of the H.264/AVC standard is widely considered for IPTV. SVCsupports a variety of scalability modes, including temporal, spatial as well as coarse-grain and medium-grainquality scalabilities. In this paper, we first give an overview of coarse-grain quality scalability (CGS). We generate traces of CGS encodings of long CIF resolution video sequences; the traces provide a simple yet effective characterization of CGS encoded video for performance evaluation of video transport systems, including IPTV systems. We conduct a detailed statistical analysis of the CGS video traces. We compare the bit rate-distortion (RD) and the bit rate variability-distortion (VD) performances of scalable CGS encodings with those ofnon-scalable SVC single layer encodings. We thus quantify the tradeoff between the rate adaptability afforded by CGS encoding and the cost in terms of RD efficiency compared to non-scalable single-layer video.

    @inproceedings{PuSeReKa10,
    Abstract = {The scalable video coding extension (SVC) of the H.264/AVC standard
    is widely considered for IPTV. SVCsupports a variety of scalability
    modes, including temporal, spatial as well as coarse-grain and medium-grainquality
    scalabilities. In this paper, we first give an overview of coarse-grain
    quality scalability (CGS). We generate traces of CGS encodings of
    long CIF resolution video sequences; the traces provide a simple
    yet effective characterization of CGS encoded video for performance
    evaluation of video transport systems, including IPTV systems. We
    conduct a detailed statistical analysis of the CGS video traces.
    We compare the bit rate-distortion (RD) and the bit rate variability-distortion
    (VD) performances of scalable CGS encodings with those ofnon-scalable
    SVC single layer encodings. We thus quantify the tradeoff between
    the rate adaptability afforded by CGS encoding and the cost in terms
    of RD efficiency compared to non-scalable single-layer video.},
    Address = {Las Vegas, NV, USA},
    Author = {Akshay Pulipaka and Patrick Seeling and Martin Reisslein and Lina J. Karam},
    Booktitle = {Proc. of the IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Date-Modified = {2014-12-29 13:59:21 +0000},
    Month = jan,
    Title = {Overview and Traffic Characterization of Coarse-Grain Quality Scalable (CGS) H.264 SVC Encoded Video},
    Year = {2010}}

2009

  • P. Seeling and J. B. Starren, “Ad-hoc association of pre-determined zigbee devices,” in Proc. of the ubiquitous mobile healthcare applications workshop, Toronto, Canada, 2009.
    [BibTeX] [Abstract] [Download PDF]

    In pervasive sensor networks with high densities, similar networks might overlap, resulting in different coordinators for end devices to associate with. This can result in several problems, especially for home monitoring and hospital scenarios, where easy, fast, and accurate association of pre-determined devices is needed. Due to the rapidly changing environments in these scenarios, however, association schemes are required that allow ad-hoc associations of pre-determined devices in this context. In this paper, we describe the problems for this particular scenario with respect to the current standard methods of association and present multiple solutions to alleviate the problems encountered. We additionally present a generalized process flow for combining the different solutions into a single solution that can be implemented for future sensing and coordinating nodes.

    @inproceedings{SeSt09,
    Abstract = {In pervasive sensor networks with high densities, similar networks
    might overlap, resulting in different coordinators for end devices
    to associate with. This can result in several problems, especially
    for home monitoring and hospital scenarios, where easy, fast, and
    accurate association of pre-determined devices is needed. Due to
    the rapidly changing environments in these scenarios, however, association
    schemes are required that allow ad-hoc associations of pre-determined
    devices in this context. In this paper, we describe the problems
    for this particular scenario with respect to the current standard
    methods of association and present multiple solutions to alleviate
    the problems encountered. We additionally present a generalized process
    flow for combining the different solutions into a single solution
    that can be implemented for future sensing and coordinating nodes.},
    Address = {Toronto, Canada},
    Author = {Patrick Seeling and Justin B. Starren},
    Booktitle = {Proc. of the Ubiquitous Mobile Healthcare Applications Workshop},
    Month = {jul},
    Title = {Ad-Hoc Association of Pre-Determined ZigBee Devices},
    Url = {http://patrick.seeling.org/publication-pdfs/cnf/2009_SeeSta_ZigBeeAssoc.pdf},
    Year = {2009},
    Bdsk-Url-1 = {http://patrick.seeling.org/publication-pdfs/cnf/2009_SeeSta_ZigBeeAssoc.pdf}}

  • M. Hoppe and P. Seeling, “Security of virtualized applications: microsoft app-v and vmware thinapp,” in Proc. of the int. joint conferences on computer, information, and systems sciences and engineering (CISSE), 2009.
    [BibTeX] [Abstract]

    Virtualization has gained great popularity in recent years with application virtualization being the latest trend. Application virtualization offers several benefits for application management, especially for larger and dynamic deployment scenarios. In this paper, we initially introduce the common application virtualization principles before we evaluate the security of Microsoft App-V and VMware ThinApp application virtualization environments with respect to external security threats. We compare different user account privileges and levels of sandboxing for virtualized applications. Furtherwmore, we identify the major security risks as well as trade-offs with ease of use that result from the virtualization of applications.

    @inproceedings{HoSe09,
    Abstract = {Virtualization has gained great popularity in recent years with application
    virtualization being the latest trend. Application virtualization
    offers several benefits for application management, especially for
    larger and dynamic deployment scenarios. In this paper, we initially
    introduce the common application virtualization principles before
    we evaluate the security of Microsoft App-V and VMware ThinApp application
    virtualization environments with respect to external security threats.
    We compare different user account privileges and levels of sandboxing
    for virtualized applications. Furtherwmore, we identify the major
    security risks as well as trade-offs with ease of use that result
    from the virtualization of applications.},
    Author = {M. Hoppe and P. Seeling},
    Booktitle = {Proc. of the Int. Joint Conferences on Computer, Information, and Systems Sciences and Engineering ({CISSE})},
    Month = dec,
    Title = {Security of Virtualized Applications: Microsoft App-V and VMware ThinApp},
    Year = {2009}}

  • F. H. P. Fitzek, G. Schulte, E. Piri, J. Pinola, M. Katz, J. Huusko, K. Pentikousis, and P. Seeling, “Robust header compression for wimax femto cells.” Wiley, 2009.
    [BibTeX]
    @inbook{FiScPiPiKa09,
    Author = {Frank H.P. Fitzek and Gerrit Schulte and E. Piri and J. Pinola and Marcos Katz and J. Huusko and K. Pentikousis and Patrick Seeling},
    Isbn = {978-0-470-69680-4},
    Publisher = {Wiley},
    Title = {Robust Header Compression for WiMAX Femto Cells},
    Year = {2009}}

2008

  • M. Scheutzow, M. Reisslein, M. Maier, and P. Seeling, “Multicast capacity of packet-switched ring wdm networks,” Ieee transactions on information theory, vol. 54, iss. 2, pp. 623-644, 2008.
    [BibTeX] [Abstract] [Download PDF]

    Packet-switched unidirectional and bidirectional ring wavelength division multiplexing (WDM) networks with destination stripping provide an increased capacity due to spatial wavelength reuse. Besides unicast traffic, future destination stripping ring WDM networks also need to support multicast traffic efficiently. This article examines the largest achievable transmitter throughput, receiver throughput, and multicast throughput of both unidirectional and bidirectional ring WDM networks with destination stripping. A probabilistic analysis evaluates both the nominal capacity, which is based on the mean hop distances traveled by the multicast packet copies, and the effective capacity, which is based on the ring segment with the highest utilization probability, for each of the three throughput metrics. The developed analytical methodology accommodates not only multicast traffic with arbitrary multicast fanout but also unicast and broadcast traffic. Numerical investigations compare the nominal transmission, receiver, and multicast capacities with the effective transmission, receiver, and multicast capacities and examine the impact of number of ring nodes and multicast fanout on the effective transmission, reception, and multicast capacity of both types of ring networks for different unicast, multicast, and broadcast traffic scenarios and different mixes of unicast and multicast traffic. The presented analytical methodology enables the evaluation and comparison of future multicast-capable medium access control (MAC) protocols for unidirectional and bidirectional ring WDM networks in terms of transmitter, receiver, and multicast throughput efficiency.

    @article{ScReMaSe08,
    Abstract = {Packet-switched unidirectional and bidirectional ring wavelength division
    multiplexing (WDM) networks with destination stripping provide an
    increased capacity due to spatial wavelength reuse. Besides unicast
    traffic, future destination stripping ring WDM networks also need
    to support multicast traffic efficiently. This article examines the
    largest achievable transmitter throughput, receiver throughput, and
    multicast throughput of both unidirectional and bidirectional ring
    WDM networks with destination stripping. A probabilistic analysis
    evaluates both the nominal capacity, which is based on the mean hop
    distances traveled by the multicast packet copies, and the effective
    capacity, which is based on the ring segment with the highest utilization
    probability, for each of the three throughput metrics. The developed
    analytical methodology accommodates not only multicast traffic with
    arbitrary multicast fanout but also unicast and broadcast traffic.
    Numerical investigations compare the nominal transmission, receiver,
    and multicast capacities with the effective transmission, receiver,
    and multicast capacities and examine the impact of number of ring
    nodes and multicast fanout on the effective transmission, reception,
    and multicast capacity of both types of ring networks for different
    unicast, multicast, and broadcast traffic scenarios and different
    mixes of unicast and multicast traffic. The presented analytical
    methodology enables the evaluation and comparison of future multicast-capable
    medium access control (MAC) protocols for unidirectional and bidirectional
    ring WDM networks in terms of transmitter, receiver, and multicast
    throughput efficiency.},
    Author = {Michael Scheutzow and Martin Reisslein and Martin Maier and Patrick Seeling},
    Journal = {IEEE Transactions on Information Theory},
    Month = {feb},
    Number = {2},
    Pages = {623--644},
    Title = {Multicast Capacity of Packet-Switched Ring WDM Networks},
    Url = {http://patrick.seeling.org/publication-pdfs/jrn/2008_SchReiMaiSee_wdm_mc_cap_IT.pdf},
    Volume = {54},
    Year = {2008},
    Bdsk-Url-1 = {http://patrick.seeling.org/publication-pdfs/jrn/2008_SchReiMaiSee_wdm_mc_cap_IT.pdf}}

  • P. Seeling, “Labs at home,” Acm inroads – the sigcse bulletin, vol. 40, iss. 3, 2008.
    [BibTeX] [Abstract] [Download PDF]

    In this publication, we introduce the Labs@Home framework, which enables students to conduct laboratory elements of courses on their personal computing equipment. A major benefit of this approach is that students are able to progress through assignments at a time and pace of their choice, before submitting the results to the instructor for review. The introduced framework is based on capturing differences between versions of the virtual machines and exchanging these between instructor and students. We are currently implementing several parts of the framework and expect to evaluate its implementation in the near future.

    @article{Se08a,
    Abstract = {In this publication, we introduce the Labs@Home framework, which enables
    students to conduct laboratory elements of courses on their personal
    computing equipment. A major benefit of this approach is that students
    are able to progress through assignments at a time and pace of their
    choice, before submitting the results to the instructor for review.
    The introduced framework is based on capturing differences between
    versions of the virtual machines and exchanging these between instructor
    and students. We are currently implementing several parts of the
    framework and expect to evaluate its implementation in the near future.},
    Author = {Patrick Seeling},
    Journal = {ACM inroads - The SIGCSE Bulletin},
    Month = {dec},
    Number = {3},
    Title = {Labs at Home},
    Url = {http://patrick.seeling.org/publication-pdfs/jrn/2008_See_Labsathome.pdf},
    Volume = {40},
    Year = {2008},
    Bdsk-Url-1 = {http://patrick.seeling.org/publication-pdfs/jrn/2008_See_Labsathome.pdf}}

  • P. Seeling, “Scene change detection for uncompressed video,” in Proc. of the int. joint conferences on computer, information, and systems sciences and engineering (CISSE), 2008.
    [BibTeX] [Download PDF]
    @inproceedings{Se08,
    Author = {Patrick Seeling},
    Booktitle = {Proc. of the Int. Joint Conferences on Computer, Information, and Systems Sciences and Engineering ({CISSE})},
    Month = {dec},
    Title = {Scene Change Detection for Uncompressed Video},
    Url = {http://patrick.seeling.org/publication-pdfs/cnf/2008_See_SceneChanges.pdf},
    Year = {2008},
    Bdsk-Url-1 = {http://patrick.seeling.org/publication-pdfs/cnf/2008_See_SceneChanges.pdf}}

2007

  • M. an der Heiden, M. Sortais, M. Scheutzow, M. Reisslein, P. Seeling, M. Herzog, and M. Maier, “Multicast capacity of optical packet ring for hotspot traffic,” Ieee/osa journal of lightwave technology, vol. 25, iss. 9, pp. 2638-2652, 2007.
    [BibTeX] [Abstract]

    Hotspot traffic is common in metro ring networks connecting access networks with backbone networks, and these metro rings are also expected to support a mix of unicast, multicast, and broadcast traffic. Shortest path (SP) routing, as employed in the IEEE 802.17 Resilient Packet Ring (RPR), is widely considered for metro rings as it maximizes spatial reuse and, thus, the achievable packet throughput (capacity) for uniform traffic. In this paper, we analyze the capacity of bidirectional optical ring networks, such as RPR, employing SP routing for multicast (nonuniform) hotspot traffic (whereby unicast and broadcast are considered as special cases of multicast). We find that, when the traffic originating at the hotspot exceeds a critical threshold, then SP routing leads to substantial reductions in capacity to a value close to one simultaneous packet transmission. To overcome this limitation of SP routing, we propose a simple combined SP/one-copy routing strategy that provides a capacity of at least two simultaneous packet transmissions.

    @article{SoScReSe07,
    Abstract = {Hotspot traffic is common in metro ring networks connecting access
    networks with backbone networks, and these metro rings are also expected
    to support a mix of unicast, multicast, and broadcast traffic. Shortest
    path (SP) routing, as employed in the IEEE 802.17 Resilient Packet
    Ring (RPR), is widely considered for metro rings as it maximizes
    spatial reuse and, thus, the achievable packet throughput (capacity)
    for uniform traffic. In this paper, we analyze the capacity of bidirectional
    optical ring networks, such as RPR, employing SP routing for multicast
    (nonuniform) hotspot traffic (whereby unicast and broadcast are considered
    as special cases of multicast). We find that, when the traffic originating
    at the hotspot exceeds a critical threshold, then SP routing leads
    to substantial reductions in capacity to a value close to one simultaneous
    packet transmission. To overcome this limitation of SP routing, we
    propose a simple combined SP/one-copy routing strategy that provides
    a capacity of at least two simultaneous packet transmissions.},
    Author = {Matthias {an der Heiden} and Michel Sortais and Michael Scheutzow and Martin Reisslein and Patrick Seeling and Martin Herzog and Martin Maier},
    Journal = {IEEE/OSA Journal of Lightwave Technology},
    Month = {sep},
    Number = {9},
    Pages = {2638--2652},
    Title = {Multicast Capacity of Optical Packet Ring for Hotspot Traffic},
    Volume = {25},
    Year = {2007}}

  • M. Reisslein, D. Tylavsky, B. Matar, P. Seeling, and J. Reisslein, “Active and cooperative learning in a freshman digital design course: impact on persistence in engineering and student motivational orientation,” in Proc. of asee/ieee frontiers in education conference (FIE), Milwaukee, WI, USA, 2007, p. S4A1–S4A6.
    [BibTeX] [Abstract]

    In an effort to retain students in the electrical and computer science/engineering programs at Arizona State University, a freshman-level introductory digital logic design course was designed with extensive active learning components in cooperative student teams as well as hardware and software (simulation) labs. This paper reports on an evaluation of the impact of the course on the persistence of the students in the program. The recently proposed persistence in engineering (PIE) survey instrument was adapted for our setting and combined with mastery, performance, and alienation survey items to obtain deeper insights into the motivational orientations of the students. The survey was conducted both at the beginning of the course and at the end of the course to assess the impact of the course on persistence and motivational orientations. Evaluation data for two years worth of offerings of the course to a diverse population of over 450 students revealed a significant positive impact of the course on student perceptions of their skills applying science and math to real-world problems as well as of their performance on teams. On the other hand, the course significantly negatively impacted the students’ perceptions of the course workload and intensified their alienation motivation tendencies.

    @inproceedings{ReTyMaSeRe07,
    Abstract = {In an effort to retain students in the electrical and computer science/engineering
    programs at Arizona State University, a freshman-level introductory
    digital logic design course was designed with extensive active learning
    components in cooperative student teams as well as hardware and software
    (simulation) labs. This paper reports on an evaluation of the impact
    of the course on the persistence of the students in the program.
    The recently proposed persistence in engineering (PIE) survey instrument
    was adapted for our setting and combined with mastery, performance,
    and alienation survey items to obtain deeper insights into the motivational
    orientations of the students. The survey was conducted both at the
    beginning of the course and at the end of the course to assess the
    impact of the course on persistence and motivational orientations.
    Evaluation data for two years worth of offerings of the course to
    a diverse population of over 450 students revealed a significant
    positive impact of the course on student perceptions of their skills
    applying science and math to real-world problems as well as of their
    performance on teams. On the other hand, the course significantly
    negatively impacted the students' perceptions of the course workload
    and intensified their alienation motivation tendencies.},
    Address = {Milwaukee, WI, USA},
    Author = {Martin Reisslein and Daniel Tylavsky and Bassam Matar and Patrick Seeling and Jana Reisslein},
    Booktitle = {Proc. of ASEE/IEEE Frontiers in Education Conference ({FIE})},
    Date-Modified = {2014-12-27 16:39:33 +0000},
    Month = oct,
    Pages = {S4A1--S4A6},
    Title = {Active and Cooperative Learning in a Freshman Digital Design Course: Impact on Persistence in Engineering and Student Motivational Orientation},
    Year = {2007}}

  • M. Scheutzow, P. Seeling, M. Maier, and M. Reisslein, “Multicasting in a wdm-upgraded resilient packet ring (rpr),” Journal of optical networking (jon), vol. 6, iss. 5, pp. 415-421, 2007.
    [BibTeX] [Abstract]

    The recently approved IEEE 802.17 Resilient Packet Ring (RPR) network deteriorates under multicast traffic to legacy ring technologies that do not support spatial reuse. We extend our multicast approach with spatial reuse from a currently single-channel RPR to WDM-upgraded multichannel RPR networks, where each node can transmit packets on all wavelengths and receive on one wavelength, and analyze their multicast capacity. Our analysis provides a convenient method for evaluating the multicast and reception capacities of WDM-upgraded RPR networks for a wide range of uniform unicast, multicast, and broadcast traffic scenarios.

    @article{ScSeMaRe07,
    Abstract = {The recently approved IEEE 802.17 Resilient Packet Ring (RPR) network
    deteriorates under multicast traffic to legacy ring technologies
    that do not support spatial reuse. We extend our multicast approach
    with spatial reuse from a currently single-channel RPR to WDM-upgraded
    multichannel RPR networks, where each node can transmit packets on
    all wavelengths and receive on one wavelength, and analyze their
    multicast capacity. Our analysis provides a convenient method for
    evaluating the multicast and reception capacities of WDM-upgraded
    RPR networks for a wide range of uniform unicast, multicast, and
    broadcast traffic scenarios.},
    Author = {Michael Scheutzow and Patrick Seeling and Martin Maier and Martin Reisslein},
    Journal = {Journal of Optical Networking (JON)},
    Month = {may},
    Number = {5},
    Pages = {415--421},
    Title = {Multicasting in a WDM-upgraded Resilient Packet Ring (RPR)},
    Volume = {6},
    Year = {2007}}

  • M. Scheutzow, P. Seeling, M. Maier, and M. Reisslein, “Wdm star subnetwork upgrade of optical ring networks for maximum spatial reuse under multicast traffic,” Ieee journal on selected areas in communications (jsac), vol. 25, iss. 4, pp. 55-67, 2007.
    [BibTeX] [Abstract]

    We examine a recently proposed multichannel upgrade of optical single-channel ring networks where a subset of ring nodes is WDM upgraded and interconnected by a singlehop star WDM subnetwork in a pay-as-you-grow fashion. This evolutionary approach not only allows for fast and efficient multiple-failure recovery but also is well suited to efficiently sustain unpredictable changes and shifts in traffic loads. In this paper, we analytically investigate the maximum achievable capacity of the WDM star subnetwork upgrade of optical singlechannel networks under a variety of unicast and multicast traffic scenarios and compare it to that of conventional WDM ring networks. In our analysis, we take priority of ring in-transit traffic, destination stripping, and maximum spatial reuse into account. Our findings show that under multicast traffic the configuration of the star subnetwork plays an important role in order to achieve high multicast capacity. Furthermore, under multicast traffic WDM upgrading and interconnecting a subset of ring nodes might be sufficient to achieve a larger multicast capacity than in WDM rings.

    @article{ScSeMaRe07a,
    Abstract = {We examine a recently proposed multichannel upgrade of optical single-channel
    ring networks where a subset of ring nodes is WDM upgraded and interconnected
    by a singlehop star WDM subnetwork in a pay-as-you-grow fashion.
    This evolutionary approach not only allows for fast and efficient
    multiple-failure recovery but also is well suited to efficiently
    sustain unpredictable changes and shifts in traffic loads. In this
    paper, we analytically investigate the maximum achievable capacity
    of the WDM star subnetwork upgrade of optical singlechannel networks
    under a variety of unicast and multicast traffic scenarios and compare
    it to that of conventional WDM ring networks. In our analysis, we
    take priority of ring in-transit traffic, destination stripping,
    and maximum spatial reuse into account. Our findings show that under
    multicast traffic the configuration of the star subnetwork plays
    an important role in order to achieve high multicast capacity. Furthermore,
    under multicast traffic WDM upgrading and interconnecting a subset
    of ring nodes might be sufficient to achieve a larger multicast capacity
    than in WDM rings.},
    Author = {Michael Scheutzow and Patrick Seeling and Martin Maier and Martin Reisslein},
    Journal = {IEEE Journal on Selected Areas in Communications (JSAC)},
    Month = {apr},
    Number = {4},
    Pages = {55--67},
    Title = {WDM Star Subnetwork Upgrade of Optical Ring Networks for Maximum Spatial Reuse under Multicast Traffic},
    Volume = {25},
    Year = {2007}}

2006

  • P. Seeling, F. H. P. Fitzek, and M. Reisslein, Video traces for network performance evaluation, Springer, 2006.
    [BibTeX]
    @book{SeFiRe06,
    Author = {Patrick Seeling and Frank H.P. Fitzek and Martin Reisslein},
    Isbn = {978-1-4020-5565-2},
    Month = nov,
    Publisher = {Springer},
    Title = {Video Traces for Network Performance Evaluation},
    Year = {2006}}

  • P. Seeling and M. Reisslein, “Semantically coupled header compression,” in Proc. of the first ieee workshop on hot topics in web systems and technologies, Boston, MA, USA, 2006, pp. 1-8.
    [BibTeX] [Abstract]

    In this paper, we evaluate the semantic coupling of header compressor and decompressor entities in our semantically coupled header compression (SCHC) scheme. We introduce the media interleave factor (MIF) to obtain an interleaving scheme for different media streams, e.g., audio and video streams. We additionally introduce the TIMES algorithm to header compression by assuming constant deltas in the headers of media streams. Exploiting the interleaving and the constant offsets in such streams, we semantically connect the (de)compressors of a framed delta coding header compression scheme to evaluate the advantage of this coupling over traditional header compression schemes using only an individual media stream. We find that our approach of semantic coupling of multiple header (de)compressors results in higher robustness for a broad range of bit error rates. We find that using our approach, expected header savings are more stable and close to the obtainable maximum savings for typical bit error rates. We additionally find that expected packet drop savings due to header compression are larger than with the traditional single stream header compression approach.

    @inproceedings{SeRe06,
    Abstract = {In this paper, we evaluate the semantic coupling of header compressor
    and decompressor entities in our semantically coupled header compression
    (SCHC) scheme. We introduce the media interleave factor (MIF) to
    obtain an interleaving scheme for different media streams, e.g.,
    audio and video streams. We additionally introduce the TIMES algorithm
    to header compression by assuming constant deltas in the headers
    of media streams. Exploiting the interleaving and the constant offsets
    in such streams, we semantically connect the (de)compressors of a
    framed delta coding header compression scheme to evaluate the advantage
    of this coupling over traditional header compression schemes using
    only an individual media stream. We find that our approach of semantic
    coupling of multiple header (de)compressors results in higher robustness
    for a broad range of bit error rates. We find that using our approach,
    expected header savings are more stable and close to the obtainable
    maximum savings for typical bit error rates. We additionally find
    that expected packet drop savings due to header compression are larger
    than with the traditional single stream header compression approach.},
    Address = {Boston, MA, USA},
    Author = {Patrick Seeling and Martin Reisslein},
    Booktitle = {Proc. of the First IEEE Workshop on Hot Topics in Web Systems and Technologies},
    Month = {nov},
    Pages = {1--8},
    Title = {Semantically Coupled Header Compression},
    Year = {2006}}

  • P. Seeling, M. Reisslein, and F. H. P. Fitzek, “Offset trace-based video quality evaluation after network transport,” Journal of multimedia, vol. 1, iss. 2, pp. 1-13, 2006.
    [BibTeX] [Abstract]

    Video traces contain information about encoded video frames, such as frame sizes and qualities, and provide a convenient method to conduct multimedia networking research. Although widely used in networking research, these traces do not allow to determine the video quality in an accurate manner after networking transport that includes losses and delays. In this work, we provide (i) an overview of frame dependencies that have to be taken into consideration when working with video traces, (ii) an algorithmic approach to combine traditional video traces and offset distortion traces to determine the video quality or distortion after lossy network transport, (iii) offset distortion and quality characteristics and (iv) the offset distortion trace format and tools to create offset distortion traces.

    @article{SeReFi06a,
    Abstract = {Video traces contain information about encoded video frames, such
    as frame sizes and qualities, and provide a convenient method to
    conduct multimedia networking research. Although widely used in networking
    research, these traces do not allow to determine the video quality
    in an accurate manner after networking transport that includes losses
    and delays. In this work, we provide (i) an overview of frame dependencies
    that have to be taken into consideration when working with video
    traces, (ii) an algorithmic approach to combine traditional video
    traces and offset distortion traces to determine the video quality
    or distortion after lossy network transport, (iii) offset distortion
    and quality characteristics and (iv) the offset distortion trace
    format and tools to create offset distortion traces.},
    Author = {Patrick Seeling and Martin Reisslein and Frank H.P. Fitzek},
    Journal = {Journal of Multimedia},
    Month = {may},
    Number = {2},
    Pages = {1--13},
    Title = {Offset Trace-Based Video Quality Evaluation after Network Transport},
    Volume = {1},
    Year = {2006}}

  • M. Scheutzow, P. Seeling, M. Maier, and M. Reisslein, “Shortest path routing in optical wdm ring networks under multicast traffic,” Ieee communication letters, vol. 10, iss. 7, pp. 564-566, 2006.
    [BibTeX] [Abstract]

    We present an analytical model to investigate the mean hop distance of shortest path routing bidirectional optical WDM ring networks not only for multicast traffic with arbitrary fanout but also for unicast and broadcast traffic.

    @article{ScSeMaRe06,
    Abstract = {We present an analytical model to investigate the mean hop distance
    of shortest path routing bidirectional optical WDM ring networks
    not only for multicast traffic with arbitrary fanout but also for
    unicast and broadcast traffic.},
    Author = {Michael Scheutzow and Patrick Seeling and Martin Maier and Martin Reisslein},
    Journal = {IEEE Communication Letters},
    Month = {jul},
    Number = {7},
    Pages = {564--566},
    Title = {Shortest Path Routing in Optical WDM Ring Networks under Multicast Traffic},
    Volume = {10},
    Year = {2006}}

  • J. Reisslein, P. Seeling, and M. Reisslein, “Comparing static fading with adaptive fading to independent problem solving: the impact on the achievement and attitudes of high school students learning electrical circuit analysis,” Asee journal of engineering education, vol. 95, iss. 3, pp. 217-226, 2006.
    [BibTeX] [Abstract]

    This study compared conventional static fading, where the problem solving responsibility of the learner increases at a fixed sequence, with a novel adaptive fading design in which the learner assumes more problem solving responsibility only if her or his previous solution attempt is successful. This study was conducted in the engineering knowledge domain of introductory electrical circuit analysis with high school students. A 2 (static or adaptive fading) x 2 (lower or higher academic ability) Analysis of Variance (ANOVA) yielded a significant main effect on retention and transfer performance: with adaptive fading the participants scored significantly higher on retention and transfer than with static fading, while not requiring more learning time or learning material.

    @article{ReSeRe06,
    Abstract = {This study compared conventional static fading, where the problem
    solving responsibility of the learner increases at a fixed sequence,
    with a novel adaptive fading design in which the learner assumes
    more problem solving responsibility only if her or his previous solution
    attempt is successful. This study was conducted in the engineering
    knowledge domain of introductory electrical circuit analysis with
    high school students. A 2 (static or adaptive fading) x 2 (lower
    or higher academic ability) Analysis of Variance (ANOVA) yielded
    a significant main effect on retention and transfer performance:
    with adaptive fading the participants scored significantly higher
    on retention and transfer than with static fading, while not requiring
    more learning time or learning material.},
    Author = {Jana Reisslein and Patrick Seeling and Martin Reisslein},
    Journal = {ASEE Journal of Engineering Education},
    Month = {jul},
    Number = {3},
    Pages = {217--226},
    Title = {Comparing Static Fading with Adaptive Fading to Independent Problem Solving: The Impact on the Achievement and Attitudes of High School Students Learning Electrical Circuit Analysis},
    Volume = {95},
    Year = {2006}}

  • P. Seeling, M. Reisslein, T. Madsen, and F. H. P. Fitzek, “Performance analysis of header compression schemes in heterogeneouswireless multi–hop networks,” Wireless personal communications, vol. 38, iss. 2, pp. 203-232, 2006.
    [BibTeX] [Abstract]

    Wireless multi–hop networks are becoming more popular and the demand for multimedia services in these networks rises with the number of their implementations. Header compression schemes that compress the IP/UDP/RTP headers to save bandwidth for multimedia streams were typically evaluated only for individual links, not taking into account the savings that can be achieved using header compression over a complete path. In this paper, we evaluate the performance of three categories of header compression schemes: (i) delta coding, (ii) framed delta coding, and (iii) framed referential coding. We evaluate the performance for these schemes on reliable and unreliable links. We then extend our evaluations to several links constituting a path. As nodes in multi–hop ad-hoc and mesh networks may differ with respect to their capabilities, we assume in our evaluation that (forwarding) nodes may not be able or choose not to perform header compression. We find that the framed referential header compression scheme is the most suitable scheme in case that no or long-delay feedback channels exist. We additionally compare the packet drop savings due to header compression and the combined savings of compression and drops. We again find that the framed referential coding scheme exhibits good performance that can lead to significant header compression and packet drop savings for reasonable bit error rates.

    @article{SeReMaFi06,
    Abstract = {Wireless multi--hop networks are becoming more popular and the demand
    for multimedia services in these networks rises with the number of
    their implementations. Header compression schemes that compress the
    IP/UDP/RTP headers to save bandwidth for multimedia streams were
    typically evaluated only for individual links, not taking into account
    the savings that can be achieved using header compression over a
    complete path. In this paper, we evaluate the performance of three
    categories of header compression schemes: (i) delta coding, (ii)
    framed delta coding, and (iii) framed referential coding. We evaluate
    the performance for these schemes on reliable and unreliable links.
    We then extend our evaluations to several links constituting a path.
    As nodes in multi--hop ad-hoc and mesh networks may differ with respect
    to their capabilities, we assume in our evaluation that (forwarding)
    nodes may not be able or choose not to perform header compression.
    We find that the framed referential header compression scheme is
    the most suitable scheme in case that no or long-delay feedback channels
    exist. We additionally compare the packet drop savings due to header
    compression and the combined savings of compression and drops. We
    again find that the framed referential coding scheme exhibits good
    performance that can lead to significant header compression and packet
    drop savings for reasonable bit error rates.},
    Author = {Patrick Seeling and Martin Reisslein and Tatjana Madsen and Frank H.P. Fitzek},
    Journal = {Wireless Personal Communications},
    Month = {jul},
    Number = {2},
    Pages = {203--232},
    Title = {Performance Analysis of Header Compression Schemes in HeterogeneousWireless Multi--Hop Networks},
    Volume = {38},
    Year = {2006}}

  • P. Seeling and M. Reisslein, “Video pricing for wireless networks,” in Proc. of ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2006, pp. 749-753.
    [BibTeX] [Abstract] [Download PDF]

    The development of pricing schemes that account for the specific challenges in streaming video to wireless clients is one of the key requirements for making wireless video services economically viable. In this paper we develop a conceptual framework for the pricing of wireless video streaming. Our framework incorporates the quality of the delivered video in the given networking context in an earnings model and captures the costs for the video service in a cost model. We discuss these models in the context of cellular, WLAN, and multi-hop wireless networks. We illustrate the developed pricing framework through numerical experiments with videos of a range of quality levels.

    @inproceedings{SeRe06a,
    Abstract = {The development of pricing schemes that account for the specific challenges
    in streaming video to wireless clients is one of the key requirements
    for making wireless video services economically viable. In this paper
    we develop a conceptual framework for the pricing of wireless video
    streaming. Our framework incorporates the quality of the delivered
    video in the given networking context in an earnings model and captures
    the costs for the video service in a cost model. We discuss these
    models in the context of cellular, WLAN, and multi-hop wireless networks.
    We illustrate the developed pricing framework through numerical experiments
    with videos of a range of quality levels.},
    Address = {Las Vegas, NV, USA},
    Author = {Patrick Seeling and Martin Reisslein},
    Booktitle = {Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Month = {jan},
    Pages = {749--753},
    Title = {Video Pricing for Wireless Networks},
    Url = {http://patrick.seeling.org/publications/cnf/2006_SeeRei_VideoPricing.pdf},
    Volume = {2},
    Year = {2006},
    Bdsk-Url-1 = {http://patrick.seeling.org/publications/cnf/2006_SeeRei_VideoPricing.pdf}}

  • J. Reisslein, R. K. Atkinson, P. Seeling, and M. Reisslein, “Encountering the expertise reversal effect with a computer-based environment on electrical circuit analysis,” Learning and instruction, vol. 16, iss. 2, pp. 92-103, 2006.
    [BibTeX] [Abstract]

    This study examined the effectiveness of a computer-based environment employing three example-based instructional procedures (example-problem, problem-example, and fading) to teach series and parallel electrical circuit analysis to learners classified by two levels of prior knowledge (low and high). Although no differences between the instructional procedures were observed, low prior knowledge learners benefited most from traditional exampleeproblem pairs while their high prior knowledge counterparts benefited most from problemeexample pairs. Overall, this study provides empirical support for the expertise reversal effect, which suggests that the effectiveness of certain instruction procedures in example-based learning environments depends upon the learnersâ€â{\glqq}¢ level of prior knowledge.

    @article{ReAtSeRe06,
    Abstract = {This study examined the effectiveness of a computer-based environment
    employing three example-based instructional procedures (example-problem,
    problem-example, and fading) to teach series and parallel electrical
    circuit analysis to learners classified by two levels of prior knowledge
    (low and high). Although no differences between the instructional
    procedures were observed, low prior knowledge learners benefited
    most from traditional exampleeproblem pairs while their high prior
    knowledge counterparts benefited most from problemeexample pairs.
    Overall, this study provides empirical support for the expertise
    reversal effect, which suggests that the effectiveness of certain
    instruction procedures in example-based learning environments depends
    upon the learners{\^a}{\^a}{\^a}{\^a}‚¬\v{s}{\^A}{\^A}¬{\^a}{\glqq}{\^A}{\^A}¢
    level of prior knowledge.},
    Author = {Jana Reisslein and Robert K. Atkinson and Patrick Seeling and Martin Reisslein},
    Journal = {Learning and Instruction},
    Month = {apr},
    Number = {2},
    Pages = {92--103},
    Title = {Encountering the Expertise Reversal Effect with a Computer-based Environment on Electrical Circuit Analysis},
    Volume = {16},
    Year = {2006}}

  • P. Seeling, M. Reisslein, and F. H. P. Fitzek, “Layered video coding offset traces for trace-based evaluation of video quality after network transport,” in Proc. of ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2006, pp. 292-296.
    [BibTeX] [Abstract]

    Currently available video traces for scalable encoded video with more than one layer are a convenient representation of the encoded video for the evaluation of networking mechanisms. The video distortion (RMSE) or quality (PSNR) for individual video frames in these traces, however, only allow for the calculation of the video quality of correctly received video frames; for lossy network transport, only a rough approximation can be made. With the availability of scalable offset distortion traces, which we introduce and evaluate in this paper, networking researchers are enabled to accurately calculate the video quality of scalable encoded video as it is perceived by the receiving client after lossy network transport.

    @inproceedings{SeReFi06,
    Abstract = {Currently available video traces for scalable encoded video with more
    than one layer are a convenient representation of the encoded video
    for the evaluation of networking mechanisms. The video distortion
    (RMSE) or quality (PSNR) for individual video frames in these traces,
    however, only allow for the calculation of the video quality of correctly
    received video frames; for lossy network transport, only a rough
    approximation can be made. With the availability of scalable offset
    distortion traces, which we introduce and evaluate in this paper,
    networking researchers are enabled to accurately calculate the video
    quality of scalable encoded video as it is perceived by the receiving
    client after lossy network transport.},
    Address = {Las Vegas, NV, USA},
    Author = {Patrick Seeling and Martin Reisslein and Frank H.P. Fitzek},
    Booktitle = {Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Pages = {292--296},
    Title = {Layered Video Coding Offset Traces for Trace-Based Evaluation of Video Quality after Network Transport},
    Volume = {1},
    Year = {2006}}

2005

  • P. Seeling and M. Reisslein, “Evaluating multimedia networking mechanisms using video traces,” Ieee potentials, vol. 24, iss. 4, pp. 21-25, 2005.
    [BibTeX] [Abstract]

    With the increasing popularity of networked multimedia applications, video data is expected to account for a large portion of the traffic in the Internet of the future and in next-generation wireless systems. For transport over networks, video is typically encoded (i.e., compressed) to reduce bandwidth requirements. Even compressed video, however, requires large bandwidths on the order of 100 kb/s or Mb/s. In addition, compressed video streams typically exhibit highly variable bit rates (VBRs). This, in conjunction with the stringent quality of service (QoS) requirements (loss and delay) of video traffic, makes the transport of video traffic over communication networks a challenging problem. As a consequence, in the last decade, networking research on all aspects of video transport has exploded. The characteristics of video traffic, video traffic modeling, as well as protocols and mechanisms for the efficient transport of video streams have received a great deal of interest among networking researchers and network operators. Video traces, which give the sizes of the individual video frames in a video sequence, have been emerging as convenient video characterizations for networking studies. This article introduces video traces and outlines how they characterize encoded video and can be used in evaluating multimedia networking mechanisms.

    @article{SeRe05a,
    Abstract = {With the increasing popularity of networked multimedia applications,
    video data is expected to account for a large portion of the traffic
    in the Internet of the future and in next-generation wireless systems.
    For transport over networks, video is typically encoded (i.e., compressed)
    to reduce bandwidth requirements. Even compressed video, however,
    requires large bandwidths on the order of 100 kb/s or Mb/s. In addition,
    compressed video streams typically exhibit highly variable bit rates
    (VBRs). This, in conjunction with the stringent quality of service
    (QoS) requirements (loss and delay) of video traffic, makes the transport
    of video traffic over communication networks a challenging problem.
    As a consequence, in the last decade, networking research on all
    aspects of video transport has exploded. The characteristics of video
    traffic, video traffic modeling, as well as protocols and mechanisms
    for the efficient transport of video streams have received a great
    deal of interest among networking researchers and network operators.
    Video traces, which give the sizes of the individual video frames
    in a video sequence, have been emerging as convenient video characterizations
    for networking studies. This article introduces video traces and
    outlines how they characterize encoded video and can be used in evaluating
    multimedia networking mechanisms.},
    Author = {Patrick Seeling and Martin Reisslein},
    Journal = {IEEE Potentials},
    Month = {oct},
    Number = {4},
    Pages = {21--25},
    Title = {Evaluating Multimedia Networking Mechanisms Using Video Traces},
    Volume = {24},
    Year = {2005}}

  • P. Seeling and M. Reisslein, “Video offset distortion descriptors for trace-based evaluation of video quality after network transport,” in Proc. of ieee international conference on computer communications and networks (icccn), San Diego, CA, USA, 2005, pp. 375-380.
    [BibTeX] [Abstract]

    Video traces containing the sizes and (PSNR) qualities of the individual frames of a video encoding are a convenient video representation for the evaluation of video networking mechanisms. These video traces can be used to find the frame loss probabilities of a lossy networking mechanism, but can not give the PSNR video quality after lossy network transport. To date the video quality after lossy network transport could only be determined through experiments with actual video or by approximating the quality of the frames affected by a loss with some low PSNR quality. In this paper we introduce and evaluate offset distortion traces with which the video quality after lossy network transport can be accurately determined without requiring experiments with actual video. We explain how the offset distortion traces can be used by networking researchers without equipment or experience in video signal processing to accurately evaluate video networking mechanisms in terms of the PSNR video quality.

    @inproceedings{SeRe05c,
    Abstract = {Video traces containing the sizes and (PSNR) qualities of the individual
    frames of a video encoding are a convenient video representation
    for the evaluation of video networking mechanisms. These video traces
    can be used to find the frame loss probabilities of a lossy networking
    mechanism, but can not give the PSNR video quality after lossy network
    transport. To date the video quality after lossy network transport
    could only be determined through experiments with actual video or
    by approximating the quality of the frames affected by a loss with
    some low PSNR quality. In this paper we introduce and evaluate offset
    distortion traces with which the video quality after lossy network
    transport can be accurately determined without requiring experiments
    with actual video. We explain how the offset distortion traces can
    be used by networking researchers without equipment or experience
    in video signal processing to accurately evaluate video networking
    mechanisms in terms of the PSNR video quality.},
    Address = {San Diego, CA, USA},
    Author = {Patrick Seeling and Martin Reisslein},
    Booktitle = {Proc. of IEEE International Conference on Computer Communications and Networks (ICCCN)},
    Month = {oct},
    Pages = {375--380},
    Title = {Video Offset Distortion Descriptors for Trace-Based Evaluation of Video Quality after Network Transport},
    Year = {2005}}

  • M. Reisslein, J. Reisslein, and P. Seeling, “A course on multimedia qos networking: transition to hybrid offering and comparative evaluation,” in Proc. of asee/ieee frontiers in education conference (fie), Indianapolis, IN, USA, 2005, p. S3H1–S3H3.
    [BibTeX] [Abstract]

    A companion paper describes the development and evaluation of the on-campus format of a novel Multimedia QoS Networking course that introduces students to the basic principles and current developments in this emerging field through a combination of lecture, topic exploration, and paper critiquing and discussion. This paper presents: (i) the transformation of the course from the on-campus-only format to a hybrid on-campus/distance learning format, and (ii) the comparative evaluation of the two formats and different forms of the paper critique discussions in the hybrid format. While the lecture (40\% of class time) and topic exploration (30\% of class time) components could be transformed with standard approaches to the hybrid on-campus/distance education with streaming class video format, the transformation of the highly interactive paper critique discussions (30\% of class time), which are crucial for developing a deep understanding of the course content, proved challenging. Three different forms of the paper critique discussion were tested and evaluated: 1) in-class discussion (with distance students visiting the campus or viewing the video of the recorded discussion), 2) asynchronous Web-based discussion board, and 3) synchronous Web-based live chat. The two course formats as well as the different forms of the paper critique discussion in the hybrid course format were evaluated through extensive student surveys and interviews. The results indicate that student attitudes were approximately equally positive toward both course formats. There was a tendency for the asynchronous discussions to be perceived more positively in terms of learning effectiveness and effectiveness of interaction with the peers than the live chat discussion, while the live chat was preferred in terms of interaction with the instructor. These results and the reported student feedback to the open-ended survey questions and the interviews provide valuable guidance for designing interactive seminar-s- – tyle courses on emerging topics in a hybrid format.

    @inproceedings{ReReSe05,
    Abstract = {A companion paper describes the development and evaluation of the
    on-campus format of a novel Multimedia QoS Networking course that
    introduces students to the basic principles and current developments
    in this emerging field through a combination of lecture, topic exploration,
    and paper critiquing and discussion. This paper presents: (i) the
    transformation of the course from the on-campus-only format to a
    hybrid on-campus/distance learning format, and (ii) the comparative
    evaluation of the two formats and different forms of the paper critique
    discussions in the hybrid format. While the lecture (40\% of class
    time) and topic exploration (30\% of class time) components could
    be transformed with standard approaches to the hybrid on-campus/distance
    education with streaming class video format, the transformation of
    the highly interactive paper critique discussions (30\% of class
    time), which are crucial for developing a deep understanding of the
    course content, proved challenging. Three different forms of the
    paper critique discussion were tested and evaluated: 1) in-class
    discussion (with distance students visiting the campus or viewing
    the video of the recorded discussion), 2) asynchronous Web-based
    discussion board, and 3) synchronous Web-based live chat. The two
    course formats as well as the different forms of the paper critique
    discussion in the hybrid course format were evaluated through extensive
    student surveys and interviews. The results indicate that student
    attitudes were approximately equally positive toward both course
    formats. There was a tendency for the asynchronous discussions to
    be perceived more positively in terms of learning effectiveness and
    effectiveness of interaction with the peers than the live chat discussion,
    while the live chat was preferred in terms of interaction with the
    instructor. These results and the reported student feedback to the
    open-ended survey questions and the interviews provide valuable guidance
    for designing interactive seminar-s- - tyle courses on emerging topics
    in a hybrid format.},
    Address = {Indianapolis, IN, USA},
    Author = {Martin Reisslein and Jana Reisslein and Patrick Seeling},
    Booktitle = {Proc. of ASEE/IEEE Frontiers in Education Conference (FIE)},
    Month = {oct},
    Pages = {S3H1--S3H3},
    Title = {A Course on Multimedia QoS Networking: Transition to Hybrid Offering and Comparative Evaluation},
    Year = {2005}}

  • M. Reisslein, J. Reisslein, P. Seeling, and H. Yang, “A course on multimedia qos networking: development and evaluation of on-campus offering,” in Proc. of asee/ieee frontiers in education conference (fie), Indianapolis, IN, USA, 2005, p. S1J1–S1J6.
    [BibTeX] [Abstract]

    Multimedia networking applications are becoming increasingly popular and the ongoing research in this field is providing a progressively more sophisticated understanding of the underlying principles of providing quality of service (QoS) for networked multimedia applications. To provide education in this emerging area, which is of increasing importance for electrical, computer, and industrial engineers, a course on Multimedia QoS Networking has been developed at Arizona State University. To provide the students with a balanced education in the fundamental principles and in the current development trends the course structure has three components: 1) lecture (40\% of class contact time), in which the instructor presents the basic principles, 2) topic exploration (30\% of contact time), which expands on the basic principles and explores current trends through student presentations, and 3) paper critique, in which the readings from the recent literature are critically evaluated and examined in instructor-led discussions (30\% of contact time). The on-campus offering of the course was evaluated through the assessment of student work, student surveys, and student interviews. The assessment indicates the students were very positive toward the course structure, especially the paper critiques and their in-class discussions.

    @inproceedings{ReReSeYa05,
    Abstract = {Multimedia networking applications are becoming increasingly popular
    and the ongoing research in this field is providing a progressively
    more sophisticated understanding of the underlying principles of
    providing quality of service (QoS) for networked multimedia applications.
    To provide education in this emerging area, which is of increasing
    importance for electrical, computer, and industrial engineers, a
    course on Multimedia QoS Networking has been developed at Arizona
    State University. To provide the students with a balanced education
    in the fundamental principles and in the current development trends
    the course structure has three components: 1) lecture (40\% of class
    contact time), in which the instructor presents the basic principles,
    2) topic exploration (30\% of contact time), which expands on the
    basic principles and explores current trends through student presentations,
    and 3) paper critique, in which the readings from the recent literature
    are critically evaluated and examined in instructor-led discussions
    (30\% of contact time). The on-campus offering of the course was
    evaluated through the assessment of student work, student surveys,
    and student interviews. The assessment indicates the students were
    very positive toward the course structure, especially the paper critiques
    and their in-class discussions.},
    Address = {Indianapolis, IN, USA},
    Author = {Martin Reisslein and Jana Reisslein and Patrick Seeling and Hyo-Sik Yang},
    Booktitle = {Proc. of ASEE/IEEE Frontiers in Education Conference (FIE)},
    Month = {oct},
    Pages = {S1J1--S1J6},
    Title = {A Course on Multimedia QoS Networking: Development and Evaluation of On-Campus Offering},
    Year = {2005}}

  • J. Reisslein, P. Seeling, and M. Reisslein, “Work-in-progress: effectiveness of worked examples and fading in introductory electrical circuit analysis for learners of different ability levels,” in Proc. of asee/ieee frontiers in education conference (fie), Indianapolis, IN, 2005, p. S2H1–S2H2.
    [BibTeX] [Abstract]

    This paper reports on work in progress to examine and improve the effectiveness of instructional sequences containing worked examples and fading solution steps in the domain of introductory electrical circuit analysis. We pay close attention to the ability levels of the learners, which have not been considered in detail in previous studies on fading. Our preliminary results indicate that different static paces of fading or adaptive fading can make instructional sequences with fading more effective for learners with a range of ability levels.

    @inproceedings{ReSeRe05,
    Abstract = {This paper reports on work in progress to examine and improve the
    effectiveness of instructional sequences containing worked examples
    and fading solution steps in the domain of introductory electrical
    circuit analysis. We pay close attention to the ability levels of
    the learners, which have not been considered in detail in previous
    studies on fading. Our preliminary results indicate that different
    static paces of fading or adaptive fading can make instructional
    sequences with fading more effective for learners with a range of
    ability levels.},
    Address = {Indianapolis, IN},
    Author = {Jana Reisslein and Patrick Seeling and Martin Reisslein},
    Booktitle = {Proc. of ASEE/IEEE Frontiers in Education Conference (FIE)},
    Month = {oct},
    Pages = {S2H1--S2H2},
    Title = {Work-In-Progress: Effectiveness of Worked Examples and Fading in Introductory Electrical Circuit Analysis for Learners of Different Ability Levels},
    Year = {2005}}

  • P. Seeling, M. Reisslein, P. de Cuetos, and K. W. Ross, “Comparing the streaming of fgs encoded video at different aggregation levels: frame, gop, and scene,” International journal of communication systems, vol. 18, iss. 5, pp. 449-464, 2005.
    [BibTeX] [Abstract]

    Fine granularity scalability (FGS), a new coding technique that has recently been added to the MPEG-4 video coding standard, allows for the flexible scaling of each individual video frame at very fine granularity. This flexibility makes FGS video very well suited for rate-distortion optimized streaming mechanisms, which minimize the distortion (i.e. maximize the quality) of the streamed video by transmitting the optimal number of bits for each individual frame. The per-frame optimization of the transmission schedule, however, puts a significant computational burden on video servers and intermediate streaming gateways. In this paper we investigate the rate-distortion optimized streaming at different video frame aggregation levels. We find that compared to the optimization for each individual video frame, optimization at the level of video scenes reduces the computational effort dramatically, while reducing the video quality only very slightly.

    @article{SeReRo05,
    Abstract = {Fine granularity scalability (FGS), a new coding technique that has
    recently been added to the MPEG-4 video coding standard, allows for
    the flexible scaling of each individual video frame at very fine
    granularity. This flexibility makes FGS video very well suited for
    rate-distortion optimized streaming mechanisms, which minimize the
    distortion (i.e. maximize the quality) of the streamed video by transmitting
    the optimal number of bits for each individual frame. The per-frame
    optimization of the transmission schedule, however, puts a significant
    computational burden on video servers and intermediate streaming
    gateways. In this paper we investigate the rate-distortion optimized
    streaming at different video frame aggregation levels. We find that
    compared to the optimization for each individual video frame, optimization
    at the level of video scenes reduces the computational effort dramatically,
    while reducing the video quality only very slightly.},
    Author = {Patrick Seeling and Martin Reisslein and Phillippe {de Cuetos} and Keith W. Ross},
    Journal = {International Journal of Communication Systems},
    Month = {may},
    Number = {5},
    Pages = {449--464},
    Title = {Comparing the Streaming of FGS Encoded Video at Different Aggregation Levels: Frame, GoP, and Scene},
    Volume = {18},
    Year = {2005}}

  • M. Scheutzow, P. Seeling, M. Maier, and M. Reisslein, “Multicast capacity of packet-switched ring wdm networks,” in Proc. of ieee infocom, Miami, FL, 2005, pp. 706-717.
    [BibTeX] [Abstract]

    Packet-switched unidirectional and bidirectional ring wavelength division multiplexing (WDM) networks with destination stripping provide an increased capacity due to spatial wavelength reuse. Besides unicast traffic, future destination stripping ring WDM networks also need to support multicast traffic efficiently. In this paper, we provide a probabilistic analysis of the mean hop distances traveled by multicast packet copies on the wavelength channels, and based on the mean hop distances analyze the nominal transmission capacity, reception capacity, and multicast capacity of both unidirectional and bidirectional ring WDM networks with destination stripping. The developed analytical methodology accommodates not only multicast traffic with arbitrary multicast fanout but also unicast and broadcast traffic. In our numerical investigations we examine the impact of number of ring nodes and multicast fanout on the transmission, reception, and multicast capacity of both types of ring networks for different unicast, multicast, and broadcast traffic scenarios and different mixes of unicast and multicast traffic. Our analytical methodology provides a foundation for extended analyses of the multicast capacity of WDM ring networks and enables the evaluation and comparison of future multicast-capable medium access control (MAC) protocols for unidirectional and bidirectional ring WDM networks in terms of transmitter, receiver, and multicast throughput efficiency.

    @inproceedings{ScSeMaRe05,
    Abstract = {Packet-switched unidirectional and bidirectional ring wavelength division
    multiplexing (WDM) networks with destination stripping provide an
    increased capacity due to spatial wavelength reuse. Besides unicast
    traffic, future destination stripping ring WDM networks also need
    to support multicast traffic efficiently. In this paper, we provide
    a probabilistic analysis of the mean hop distances traveled by multicast
    packet copies on the wavelength channels, and based on the mean hop
    distances analyze the nominal transmission capacity, reception capacity,
    and multicast capacity of both unidirectional and bidirectional ring
    WDM networks with destination stripping. The developed analytical
    methodology accommodates not only multicast traffic with arbitrary
    multicast fanout but also unicast and broadcast traffic. In our numerical
    investigations we examine the impact of number of ring nodes and
    multicast fanout on the transmission, reception, and multicast capacity
    of both types of ring networks for different unicast, multicast,
    and broadcast traffic scenarios and different mixes of unicast and
    multicast traffic. Our analytical methodology provides a foundation
    for extended analyses of the multicast capacity of WDM ring networks
    and enables the evaluation and comparison of future multicast-capable
    medium access control (MAC) protocols for unidirectional and bidirectional
    ring WDM networks in terms of transmitter, receiver, and multicast
    throughput efficiency.},
    Address = {Miami, FL},
    Author = {Michael Scheutzow and Patrick Seeling and Martin Maier and Martin Reisslein},
    Booktitle = {Proc. of IEEE INFOCOM},
    Month = {mar},
    Pages = {706--717},
    Title = {Multicast Capacity of Packet-Switched Ring WDM Networks},
    Volume = {1},
    Year = {2005}}

  • F. H. P. Fitzek, S. Rein, P. Seeling, and M. Reisslein, “Robust header compression (rohc) performance for multimedia transmission over 3g/4g wireless networks,” Wireless personal communications, vol. 32, iss. 1, pp. 23-41, 2005.
    [BibTeX] [Abstract]

    RObust Header Compression (ROHC) has recently been proposed to reduce the large protocol header overhead when transmitting voice and other continuous media over IP based protocol stacks in wireless networks. In this paper we evaluate the real-time transmission of GSM encoded voice and H.26L encoded video with ROHC over a wireless link. For the voice transmission we examine the impact of ROHC on the consumed bandwidth, the voice quality, and the delay jitter in the voice signal. We find that for a wide range of error probabilities on the wireless link, ROHC roughly cuts the bandwidth required for the transmission of GSM encoded voice in half. In addition, ROHC improves the voice quality compared to transmissions without ROHC, especially for large bit error probabilities on the wireless link. The improvement reaches 0.26 on the 5-point Mean Opinion Score for a bit error probability of 10-3. For the video transmission we examine the impact of ROHC on the consumed bandwidth.We find that the bandwidth savings with ROHC depend on the quantization scale used for the video encoding and the video content and ranges between 5–40\% for typical scenarios.

    @article{FiReSeRe05,
    Abstract = {RObust Header Compression (ROHC) has recently been proposed to reduce
    the large protocol header overhead when transmitting voice and other
    continuous media over IP based protocol stacks in wireless networks.
    In this paper we evaluate the real-time transmission of GSM encoded
    voice and H.26L encoded video with ROHC over a wireless link. For
    the voice transmission we examine the impact of ROHC on the consumed
    bandwidth, the voice quality, and the delay jitter in the voice signal.
    We find that for a wide range of error probabilities on the wireless
    link, ROHC roughly cuts the bandwidth required for the transmission
    of GSM encoded voice in half. In addition, ROHC improves the voice
    quality compared to transmissions without ROHC, especially for large
    bit error probabilities on the wireless link. The improvement reaches
    0.26 on the 5-point Mean Opinion Score for a bit error probability
    of 10-3. For the video transmission we examine the impact of ROHC
    on the consumed bandwidth.We find that the bandwidth savings with
    ROHC depend on the quantization scale used for the video encoding
    and the video content and ranges between 5--40\% for typical scenarios.},
    Author = {Frank H.P. Fitzek and Stephan Rein and Patrick Seeling and Martin Reisslein},
    Journal = {Wireless Personal Communications},
    Month = {jan},
    Number = {1},
    Pages = {23--41},
    Title = {RObust Header Compression (ROHC) Performance for Multimedia Transmission over 3G/4G Wireless Networks},
    Volume = {32},
    Year = {2005}}

  • P. Seeling and M. Reisslein, “Video coding with multiple descriptors and spatial scalability for device diversity in wireless multi-hop networks,” in Proc. of ieee consumer communications and networking conference (CCNC), Las Vegas, NV, USA, 2005, pp. 278-283.
    [BibTeX] [Abstract]

    Providing video services to heterogeneous clients in wireless ad hoc networks is particularly challenging as (i) the heterogeneous client processing and display capabilities typically prevent clients from processing and displaying the same encoded video information, and (ii) wireless connections typically suffer from bandwidth variability and transmission errors. We jointly address these two challenges by introducing a novel video coding strategy which combines multiple description coding, in particular temporal descriptors, with layered spatial coding. Our spatial scalable descriptor coding strategy enables heterogeneous clients in wireless multi-hop networks with path diversity to receive preencoded video streams over independent paths and to process only that amount of encoded video information that suits their processing and display capabilities. We evaluate our coding strategy through simulation experiments with a highly dynamic video sequence. We find that our coding strategy with two descriptors improves the quality of the received video by approximately 4 dB and cuts the quality variability approximately in half compared to layered coding.

    @inproceedings{SeRe05b,
    Abstract = {Providing video services to heterogeneous clients in wireless ad hoc
    networks is particularly challenging as (i) the heterogeneous client
    processing and display capabilities typically prevent clients from
    processing and displaying the same encoded video information, and
    (ii) wireless connections typically suffer from bandwidth variability
    and transmission errors. We jointly address these two challenges
    by introducing a novel video coding strategy which combines multiple
    description coding, in particular temporal descriptors, with layered
    spatial coding. Our spatial scalable descriptor coding strategy enables
    heterogeneous clients in wireless multi-hop networks with path diversity
    to receive preencoded video streams over independent paths and to
    process only that amount of encoded video information that suits
    their processing and display capabilities. We evaluate our coding
    strategy through simulation experiments with a highly dynamic video
    sequence. We find that our coding strategy with two descriptors improves
    the quality of the received video by approximately 4 dB and cuts
    the quality variability approximately in half compared to layered
    coding.},
    Address = {Las Vegas, NV, USA},
    Author = {Patrick Seeling and Martin Reisslein},
    Booktitle = {Proc. of IEEE Consumer Communications and Networking Conference {(CCNC)}},
    Month = {jan},
    Pages = {278--283},
    Title = {Video Coding with Multiple Descriptors and Spatial Scalability for Device Diversity in Wireless Multi-hop Networks},
    Year = {2005}}

  • P. Seeling and M. Reisslein, “The rate variability-distortion (vd) curve of encoded video and its impact on statistical multiplexing,” Ieee transactions on broadcasting, vol. 51, iss. 4, pp. 473-492, 2005.
    [BibTeX]
    @article{SeRe05d,
    Author = {Patrick Seeling and Martin Reisslein},
    Journal = {IEEE Transactions on Broadcasting},
    Month = {dec},
    Note = {accepted and to appear},
    Number = {4},
    Pages = {473--492},
    Title = {The Rate Variability-Distortion (VD) Curve of Encoded Video and its Impact on Statistical Multiplexing},
    Volume = {51},
    Year = {2005}}

  • J. Reisslein, P. Seeling, R. K. Atkinson, and M. Reisslein, “Computer-based instruction on multimedia networking fundamentals: equational vs. graphical representation,” Ieee transactions on education, vol. 48, iss. 3, pp. 438-447, 2005.
    [BibTeX] [Abstract]

    Multimedia networking has been emerging in recent years as a strong driving force behind the expansion of the Internet. However, this topic is not commonly covered in the already content-intensive introductory networking courses. To facilitate student self-study of this novel topic the authors have developed a omputer-based instructional module on the fundamentals of multimedia networking. In this paper, they describe the design and development f the module, which is aligned with Gagneâ€â{\glqq}¢s theory of nstruction. They have developed two versions of the module—one ith equation-based representation of the learning content and one ith graph-based representation of the learning content. They have valuated the two versions of the module with a total of 75 undergraduate, snior-level electrical engineering students, of which half were randomly assigned to the equational representation, and the other half to the graphical representation. They found that the graphical representation results in statistically significantly higher student performance on practice and post-test problems, shorter learning time, and more positive attitudes toward the computer-based instructional module.

    @article{ReSeAtRe05a,
    Abstract = {Multimedia networking has been emerging in recent years as a strong
    driving force behind the expansion of the Internet. However, this
    topic is not commonly covered in the already content-intensive introductory
    networking courses. To facilitate student self-study of this novel
    topic the authors have developed a omputer-based instructional module
    on the fundamentals of multimedia networking. In this paper, they
    describe the design and development f the module, which is aligned
    with Gagne{\^a}{\^a}{\^a}{\^a}‚¬\v{s}{\^A}{\^A}¬{\^a}{\glqq}{\^A}{\^A}¢s
    theory of nstruction. They have developed two versions of the module{\^a}{\^a}{\^a}{\^a}‚¬\v{s}{\^A}{\^A}¬''one
    ith equation-based representation of the learning content and one
    ith graph-based representation of the learning content. They have
    valuated the two versions of the module with a total of 75 undergraduate,
    snior-level electrical engineering students, of which half were randomly
    assigned to the equational representation, and the other half to
    the graphical representation. They found that the graphical representation
    results in statistically significantly higher student performance
    on practice and post-test problems, shorter learning time, and more
    positive attitudes toward the computer-based instructional module.},
    Author = {Jana Reisslein and Patrick Seeling and Robert K. Atkinson and Martin Reisslein},
    Journal = {IEEE Transactions on Education},
    Month = {aug},
    Number = {3},
    Pages = {438--447},
    Title = {Computer-Based Instruction on Multimedia Networking Fundamentals: Equational vs. Graphical Representation},
    Volume = {48},
    Year = {2005}}

  • P. Seeling, P. de Cuetos, and M. Reisslein, “Fine granularity scalable (fgs) video: implications for streaming and a trace-based evaluation methodology,” Ieee communications magazine, vol. 43, iss. 4, pp. 138-142, 2005.
    [BibTeX] [Abstract]

    Fine granularity scalability (FGS) is a new development in the area of video coding, which is designed to facilitate video streaming over communication networks. With FGS coding, the video stream can be flexibly truncated at very fine granularity to adapt to the available network resources. In this article we introduce the communications generalist to the basic properties of FGS video coding to provide background for the design of video streaming mechanisms for FGS video. We then outline a methodology for evaluating streaming mechanisms for FGS encoded video. The methodology relies on traces of the rate-distortion characteristics of FGS encoded video and enables networking researchers and practitioners without access to video codecs and video sequences to develop and evaluate ratedistortion optimized streaming mechanisms for FGS encoded video.

    @article{SeRe05,
    Abstract = {Fine granularity scalability (FGS) is a new development in the area
    of video coding, which is designed to facilitate video streaming
    over communication networks. With FGS coding, the video stream can
    be flexibly truncated at very fine granularity to adapt to the available
    network resources. In this article we introduce the communications
    generalist to the basic properties of FGS video coding to provide
    background for the design of video streaming mechanisms for FGS video.
    We then outline a methodology for evaluating streaming mechanisms
    for FGS encoded video. The methodology relies on traces of the rate-distortion
    characteristics of FGS encoded video and enables networking researchers
    and practitioners without access to video codecs and video sequences
    to develop and evaluate ratedistortion optimized streaming mechanisms
    for FGS encoded video.},
    Author = {Patrick Seeling and Phillippe {de Cuetos} and Martin Reisslein},
    Journal = {IEEE Communications Magazine},
    Month = {apr},
    Number = {4},
    Pages = {138--142},
    Title = {Fine Granularity Scalable (FGS) Video: Implications for Streaming and a Trace-Based Evaluation Methodology},
    Volume = {43},
    Year = {2005}}

  • J. Reisslein, P. Seeling, and M. Reisslein, “Integrating emerging topics and distance learners through online team design in a communications networks course,” The internet and higher education, vol. 8, iss. 2, pp. 145-160, 2005.
    [BibTeX] [Abstract]

    An important challenge in the introductory communication networks course in electrical and computer engineering curricula is to integrate emerging topics, such as wireless Internet access and network security, into the already content-intensive course. At the same time it is essential to provide students with experiences in online collaboration, which is common in the engineering workplace, and to allow both on-campus and distance learning students to actively and jointly participate in class activities in hybrid on-campus/distance education course offerings. To address these challenges in the introductory communication networks course at Arizona State University, the authors have developed an online team design project in which students collaborate via a team website on a design project related to an emerging communication networks topic. The online team design project was evaluated with a thematic analysis of the interactions on the team websites, topic-specific pre- and posttests, and an attitudinal student survey. It was found that the online team communication was to a large extent devoted to managing the team and the project and that the students had overall very positive attitudes toward the project. Both students with lower and higher levels of prior project-related knowledge achieved approximately the same learning gain in terms of increased scores from pretest to posttest in the project.

    @article{ReSeRe05a,
    Abstract = {An important challenge in the introductory communication networks
    course in electrical and computer engineering curricula is to integrate
    emerging topics, such as wireless Internet access and network security,
    into the already content-intensive course. At the same time it is
    essential to provide students with experiences in online collaboration,
    which is common in the engineering workplace, and to allow both on-campus
    and distance learning students to actively and jointly participate
    in class activities in hybrid on-campus/distance education course
    offerings. To address these challenges in the introductory communication
    networks course at Arizona State University, the authors have developed
    an online team design project in which students collaborate via a
    team website on a design project related to an emerging communication
    networks topic. The online team design project was evaluated with
    a thematic analysis of the interactions on the team websites, topic-specific
    pre- and posttests, and an attitudinal student survey. It was found
    that the online team communication was to a large extent devoted
    to managing the team and the project and that the students had overall
    very positive attitudes toward the project. Both students with lower
    and higher levels of prior project-related knowledge achieved approximately
    the same learning gain in terms of increased scores from pretest
    to posttest in the project.},
    Author = {Jana Reisslein and Patrick Seeling and Martin Reisslein},
    Journal = {The Internet and Higher Education},
    Month = {Second Quarter},
    Number = {2},
    Pages = {145--160},
    Title = {Integrating Emerging Topics and Distance Learners through Online team design in a Communications Networks Course},
    Volume = {8},
    Year = {2005}}

  • J. Reisslein, P. Seeling, and M. Reisslein, “Video in distance education: itfs vs. web-streaming — evaluation of student attitudes,” The internet and higher education, vol. 8, iss. 1, pp. 25-44, 2005.
    [BibTeX] [Abstract]

    The use of video in distance education courses has a long tradition, with many colleges and universities having been delivering distance education courses with video since the 80â€â{\glqq}¢s using the Instructional Television Fixed Service (ITFS) and cable television. With the emergence of the Internet and the increased access bandwidths from private homes to the Internet, the delivery of distance education video via web-streaming has become more widespread and appears poised to replace the delivery of distance education video through ITFS/cable TV. At this juncture in the history of distance education video delivery it is important to take the student attitudes toward these different forms of educational video delivery into consideration. This naturalistic evaluation study examined and compared the attitudes of a total of close to 360 students who had taken distance education classes with video, whereby approximately 180 of the students had participated in classes with ITFS/cable TV video delivery and approximately 180 students had taken classes with web-streaming video delivery. The overall student satisfaction was found to be approximately the same with either form of distance education video delivery. However, there were statistically significant differences in the student attitudes towards specific aspects of the distance education video, such as perceived video quality, technical problems, and preferences for control over the instructional flow.

    @article{ReSeRe05b,
    Abstract = {The use of video in distance education courses has a long tradition,
    with many colleges and universities having been delivering distance
    education courses with video since the 80{\^a}{\^a}{\^a}{\^a}‚¬\v{s}{\^A}{\^A}¬{\^a}{\glqq}{\^A}{\^A}¢s
    using the Instructional Television Fixed Service (ITFS) and cable
    television. With the emergence of the Internet and the increased
    access bandwidths from private homes to the Internet, the delivery
    of distance education video via web-streaming has become more widespread
    and appears poised to replace the delivery of distance education
    video through ITFS/cable TV. At this juncture in the history of distance
    education video delivery it is important to take the student attitudes
    toward these different forms of educational video delivery into consideration.
    This naturalistic evaluation study examined and compared the attitudes
    of a total of close to 360 students who had taken distance education
    classes with video, whereby approximately 180 of the students had
    participated in classes with ITFS/cable TV video delivery and approximately
    180 students had taken classes with web-streaming video delivery.
    The overall student satisfaction was found to be approximately the
    same with either form of distance education video delivery. However,
    there were statistically significant differences in the student attitudes
    towards specific aspects of the distance education video, such as
    perceived video quality, technical problems, and preferences for
    control over the instructional flow.},
    Author = {Jana Reisslein and Patrick Seeling and Martin Reisslein},
    Journal = {The Internet and Higher Education},
    Month = {1st Quarter},
    Number = {1},
    Pages = {25--44},
    Title = {Video in Distance Education: ITFS vs. Web-Streaming -- Evaluation of Student Attitudes},
    Volume = {8},
    Year = {2005}}

  • J. Reisslein, P. Seeling, R. K. Atkinson, and M. Reisslein, “Investigating the presentation and format of instructional prompts in an electrical circuit analysis computer-based learning environment,” Ieee transactions on education, 2005.
    [BibTeX]
    @article{ReSeAtRe05,
    Author = {Jana Reisslein and Patrick Seeling and Robert K. Atkinson and Martin Reisslein},
    Journal = {IEEE Transactions on Education},
    Note = {accepted and to appear},
    Title = {Investigating the Presentation and Format of Instructional Prompts in an Electrical Circuit Analysis Computer-Based Learning environment},
    Year = {2005}}

2004

  • F. H. P. Fitzek, P. Seeling, M. Reisslein, R. Rugin, and M. Zorzi, “A visualisation tool for ad hoc networks: vitan,” in Proc. of the 7th international symposium on wireless personal multimedia communications (WPMC), Abano Terme, Italy, 2004, pp. 161-164.
    [BibTeX]
    @inproceedings{FiSeReRuZo04,
    Address = {Abano Terme, Italy},
    Author = {Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein and R. Rugin and Michele Zorzi},
    Booktitle = {Proc. of the 7th International Symposium on Wireless Personal Multimedia Communications ({WPMC})},
    Month = {sep},
    Pages = {161--164},
    Title = {A Visualisation Tool for Ad Hoc Networks: ViTAN},
    Volume = {1},
    Year = {2004}}

  • B. Kulapala, P. Seeling, and M. Reisslein, “Comparison of traffic and quality characteristics of rate-controlled wavelet and dct video,” in Proc. of ieee international conference on computer communications and networks (icccn), Chicago, IL, USA, 2004, pp. 247-252.
    [BibTeX] [Abstract]

    Wavelet-based encoding is now emerging as an efficient way to encode video for streaming over the Internet and for wireless applications. “Wavelet-based video coding has been recently added to the JPEG-2000 video standards. As wavelet encoded video emerges as the next generation video encoding method, it is vital to compare the efficiency of wavelet encoded video against the widely used DCT-based MPEG encoded video. However, due to the lack of long wavelet encoded video streams, most research has so far been based on short video traces. This paper presents a comparison study on MPEG vs wavelet encoded video traces for one hour movie excerpts with rate control. These long video sequences allow for the evaluation of long range dependency and self similarity of the generated video traffic, which has not been studied before in the context of comparing DCT and wavelet-based encoding. We focus on the elementary as well as self-similar traffic characteristics of the encoded video. A hump behavior for the variability of frame sizes is observed for increasing video bit rates for both wavelet and MPEG encoded video. In addition, the quality characteristics of the encoded video is examined and related to the traffic. Our results indicate that the wavelet encoded video results in higher video quality than MPEG encoded video. For the frame size variability we find different characteristics depending on the aggregation level for a given data rate. The results also indicate that the variation of quality resulting from the wavelet encoding is lower than for the MPEG encoded video.

    @inproceedings{KuSeRe04,
    Abstract = {Wavelet-based encoding is now emerging as an efficient way to encode
    video for streaming over the Internet and for wireless applications.
    ``Wavelet-based video coding has been recently added to the JPEG-2000
    video standards. As wavelet encoded video emerges as the next generation
    video encoding method, it is vital to compare the efficiency of wavelet
    encoded video against the widely used DCT-based MPEG encoded video.
    However, due to the lack of long wavelet encoded video streams, most
    research has so far been based on short video traces. This paper
    presents a comparison study on MPEG vs wavelet encoded video traces
    for one hour movie excerpts with rate control. These long video sequences
    allow for the evaluation of long range dependency and self similarity
    of the generated video traffic, which has not been studied before
    in the context of comparing DCT and wavelet-based encoding. We focus
    on the elementary as well as self-similar traffic characteristics
    of the encoded video. A hump behavior for the variability of frame
    sizes is observed for increasing video bit rates for both wavelet
    and MPEG encoded video. In addition, the quality characteristics
    of the encoded video is examined and related to the traffic. Our
    results indicate that the wavelet encoded video results in higher
    video quality than MPEG encoded video. For the frame size variability
    we find different characteristics depending on the aggregation level
    for a given data rate. The results also indicate that the variation
    of quality resulting from the wavelet encoding is lower than for
    the MPEG encoded video.},
    Address = {Chicago, IL, USA},
    Author = {Beshan Kulapala and Patrick Seeling and Martin Reisslein},
    Booktitle = {Proc. of IEEE International Conference on Computer Communications and Networks (ICCCN)},
    Month = {oct},
    Pages = {247--252},
    Title = {Comparison of Traffic and Quality Characteristics of Rate-Controlled Wavelet and DCT Video},
    Year = {2004}}

  • F. H. P. Fitzek, P. Seeling, and M. Reisslein, “Video and audio trace files of pre-encoded video content for network performance measurements,” in Proceedings of the ieee consumer communications and networking conference (CCNC 04), Las Vegas, NV, 2004, pp. 245-250.
    [BibTeX] [Abstract]

    Video services are expected to account for a large portion of the traffic in future wireless networks. Therefore, realistic traffic sources are needed to investigate the network performance of future communication protocols. Previously, we provided a publicly available library of frame size traces of long MPEG-4 and H.263 encoded videos in the QCIF format resulting in low bandwidth video streams. These traces can be used in 3G network simulations. Some future communication systems, such as WLAN systems, offer high data rates and therefore high quality video can be transmitted over such higher speed networks. We now present an addition to our existing trace library. For this addition we collected over 100 pre-encoded video sequences from the Web, generated the trace files, and conducted a thorough statistical evaluation. Because the pre-encoded video sequences are encoded by different users, their video settings differ in terms of codec, quality, format, and length. The advantage of user diversity for encoding is that it reflects very well the traffic situation in upcoming WLANs. Thus, the new traces are very suitable for the network performance evaluation of future WLANs.

    @inproceedings{FiSeRe04,
    Abstract = {Video services are expected to account for a large portion of the
    traffic in future wireless networks. Therefore, realistic traffic
    sources are needed to investigate the network performance of future
    communication protocols. Previously, we provided a publicly available
    library of frame size traces of long MPEG-4 and H.263 encoded videos
    in the QCIF format resulting in low bandwidth video streams. These
    traces can be used in 3G network simulations. Some future communication
    systems, such as WLAN systems, offer high data rates and therefore
    high quality video can be transmitted over such higher speed networks.
    We now present an addition to our existing trace library. For this
    addition we collected over 100 pre-encoded video sequences from the
    Web, generated the trace files, and conducted a thorough statistical
    evaluation. Because the pre-encoded video sequences are encoded by
    different users, their video settings differ in terms of codec, quality,
    format, and length. The advantage of user diversity for encoding
    is that it reflects very well the traffic situation in upcoming WLANs.
    Thus, the new traces are very suitable for the network performance
    evaluation of future WLANs.},
    Address = {Las Vegas, NV},
    Author = {Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein},
    Booktitle = {Proceedings of the IEEE Consumer Communications and Networking Conference {(CCNC 04)}},
    Month = {jan},
    Pages = {245--250},
    Title = {Video and Audio Trace Files of Pre-encoded Video Content for Network Performance Measurements},
    Volume = {1},
    Year = {2004}}

  • P. Seeling, M. Reisslein, and B. Kulapala, “Network performance evaluation with frame size and quality traces of single-layer and two-layer video: a tutorial,” Ieee communications surveys and tutorials, vol. 6, iss. 3, pp. 58-78, 2004.
    [BibTeX] [Abstract]

    Video traffic is widely expected to account for a large portion of the traffic in future wireline and wireless networks, as multimedia applications are becoming increasingly popular. Consequently, the performance evaluation of networking architectures, protocols, and mechanisms for video traffic becomes increasingly important. Video traces, which give the sizes, deadlines, and qualities of the individual video frames in a video sequence, have been emerging as convenient video characterizations for networking studies. In this tutorial we give an introduction to the use of video traces in networking studies. First we give a brief overview of digital video and its encoding and playout. Then we present a library of traces of single- and two-layer encoded video. We discuss the statistical properties of the traces and the resulting implications for the transport of video over networks. Finally we discuss the factors that need to be considered when using video traces in network performance evaluations. In particular, we introduce performance metrics that quantify the quality of the delivered video. We outline a procedure for generating video load for network simulations from the traces, and discuss how to meaningfully analyze the outcomes of these simulations.

    @article{SeReKu04,
    Abstract = {Video traffic is widely expected to account for a large portion of
    the traffic in future wireline and wireless networks, as multimedia
    applications are becoming increasingly popular. Consequently, the
    performance evaluation of networking architectures, protocols, and
    mechanisms for video traffic becomes increasingly important. Video
    traces, which give the sizes, deadlines, and qualities of the individual
    video frames in a video sequence, have been emerging as convenient
    video characterizations for networking studies. In this tutorial
    we give an introduction to the use of video traces in networking
    studies. First we give a brief overview of digital video and its
    encoding and playout. Then we present a library of traces of single-
    and two-layer encoded video. We discuss the statistical properties
    of the traces and the resulting implications for the transport of
    video over networks. Finally we discuss the factors that need to
    be considered when using video traces in network performance evaluations.
    In particular, we introduce performance metrics that quantify the
    quality of the delivered video. We outline a procedure for generating
    video load for network simulations from the traces, and discuss how
    to meaningfully analyze the outcomes of these simulations.},
    Author = {Patrick Seeling and Martin Reisslein and Beshan Kulapala},
    Journal = {IEEE Communications Surveys and Tutorials},
    Month = {Third Quarter},
    Number = {3},
    Pages = {58--78},
    Title = {Network Performance Evaluation with Frame Size and Quality Traces of Single-Layer and Two-Layer Video: A Tutorial},
    Volume = {6},
    Year = {2004}}

  • F. H. P. Fitzek, S. Hendrata, P. Seeling, and M. Reisslein, “Video streaming in wireless internet,” in Mobile internet: enabling technologies and services, CRC Press, 2004.
    [BibTeX]
    @inbook{FiHeSeRe04a,
    Author = {Frank H.P. Fitzek and Stefan Hendrata and Patrick Seeling and Martin Reisslein},
    Booktitle = {Mobile Internet: Enabling Technologies and Services},
    Chapter = {11},
    Publisher = {CRC Press},
    Series = {Electrical Engineering \& Applied Signal Processing},
    Title = {Video Streaming in Wireless Internet},
    Year = {2004}}

  • F. H. P. Fitzek, S. Hendrata, P. Seeling, and M. Reisslein, “Header compression schemes for wireless internet access,” in Mobile internet: enabling technologies and services, CRC Press, 2004.
    [BibTeX]
    @inbook{FiHeSeRe04,
    Author = {Frank H.P. Fitzek and Stefan Hendrata and Patrick Seeling and Martin Reisslein},
    Booktitle = {Mobile Internet: Enabling Technologies and Services},
    Chapter = {10},
    Publisher = {CRC Press},
    Series = {Electrical Engineering \& Applied Signal Processing},
    Title = {Header Compression Schemes for Wireless Internet Access},
    Year = {2004}}

2003

  • F. H. P. Fitzek, L. Badia, P. Seeling, G. Schulte, and T. Henderson, “Mobility and stability evaluation in wireless multi-hop networks using multiplayer games,” in Proceedings of netgames 2003, Redwood City, CA, 2003, pp. 77-87.
    [BibTeX] [Abstract] [Download PDF]

    Multi-hop networks have gained a lot of interest in recent years. A lot of work was contributed in the field of protocol design and performance of multi-hop networks. It is generally accepted that mobility has a huge impact on the protocol performance; even more for multi-hop networks. Obtaining realistic measurements of mobility, however, is complex and expensive. Thus, we adopt virtual world scenarios to explore the mobility issue, by using the well-known multi-player game, Quake II. The advantage of the Quake II engine is that users move within virtual worlds under realistic constraints, whereas other mobility models may offer insufficient accuracy or operate under unrealistic assumptions. Moreover, it is very easy to create new virtual worlds and to adapt them to specialized needs. In this paper, we propose an analytical framework for mobility measurements in virtual worlds that could be adopted for the design of communication protocols. Our framework enables the study of the impact of mobility on connectivity and stability of the network, giving useful insights for improving communication performance. An interesting application of our approach is the analysis of coverage extension of so called hotspots or emergency situations, where the fixed network infrastructure is insufficient or non-existent. In these extreme cases, multi-hop networks can be used to setup communication quickly. As these situations comprise a plethora of different cases and scenarios, our model is appropriate for their analysis, due to its generality. We use our framework to investigate the performance of multi-hop networks based on IEEE 802.11a technology. In contrast to other contributions focusing only on connectivity, the IEEE 802.11a technology also considers multi-rate connections. Our framework covers the evaluation of simple connectivity as well as link quality stability in the presence of mobility, a combination that has not been considered thus far. Therefore we introduce two simple routing schemes and highlight the performance of these protocols in presence of mobility. Furthermore we come up with four definitions of stability and investigate protocols for multi-hop networks in terms of this parameter. Our other contributions are the changes to the Quake II engine and the availability of mobility trace files.

    @inproceedings{FiBaSeScHe03,
    Abstract = {Multi-hop networks have gained a lot of interest in recent years.
    A lot of work was contributed in the field of protocol design and
    performance of multi-hop networks. It is generally accepted that
    mobility has a huge impact on the protocol performance; even more
    for multi-hop networks. Obtaining realistic measurements of mobility,
    however, is complex and expensive. Thus, we adopt virtual world scenarios
    to explore the mobility issue, by using the well-known multi-player
    game, Quake II. The advantage of the Quake II engine is that users
    move within virtual worlds under realistic constraints, whereas other
    mobility models may offer insufficient accuracy or operate under
    unrealistic assumptions. Moreover, it is very easy to create new
    virtual worlds and to adapt them to specialized needs. In this paper,
    we propose an analytical framework for mobility measurements in virtual
    worlds that could be adopted for the design of communication protocols.
    Our framework enables the study of the impact of mobility on connectivity
    and stability of the network, giving useful insights for improving
    communication performance. An interesting application of our approach
    is the analysis of coverage extension of so called hotspots or emergency
    situations, where the fixed network infrastructure is insufficient
    or non-existent. In these extreme cases, multi-hop networks can be
    used to setup communication quickly. As these situations comprise
    a plethora of different cases and scenarios, our model is appropriate
    for their analysis, due to its generality. We use our framework to
    investigate the performance of multi-hop networks based on IEEE 802.11a
    technology. In contrast to other contributions focusing only on connectivity,
    the IEEE 802.11a technology also considers multi-rate connections.
    Our framework covers the evaluation of simple connectivity as well
    as link quality stability in the presence of mobility, a combination
    that has not been considered thus far. Therefore we introduce two
    simple routing schemes and highlight the performance of these protocols
    in presence of mobility. Furthermore we come up with four definitions
    of stability and investigate protocols for multi-hop networks in
    terms of this parameter. Our other contributions are the changes
    to the Quake II engine and the availability of mobility trace files.},
    Address = {Redwood City, CA},
    Author = {Frank H.P. Fitzek and Leonardo Badia and Patrick Seeling and Gerrit Schulte and Tristan Henderson},
    Booktitle = {Proceedings of NetGames 2003},
    Month = {may},
    Pages = {77--87},
    Title = {Mobility and Stability Evaluation in Wireless Multi-Hop Networks Using Multiplayer Games},
    Url = {http://patrick.seeling.org/publications/cnf/2003_FitBadZorSchSeeHen_NetGames.pdf},
    Year = {2003},
    Bdsk-Url-1 = {http://patrick.seeling.org/publications/cnf/2003_FitBadZorSchSeeHen_NetGames.pdf}}

  • F. H. P. Fitzek, P. Seeling, M. Reisslein, and M. Zorzi, “Vitan – visualisation tool for ad hoc networks,” Ieee network, vol. 17, iss. 4, p. 9, 2003.
    [BibTeX]
    @article{FiSeReZo03,
    Author = {Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein and Michele Zorzi},
    Journal = {IEEE Network},
    Month = {jul},
    Number = {4},
    Pages = {9},
    Title = {ViTAN - Visualisation Tool for Ad hoc Networks},
    Volume = {17},
    Year = {2003}}

  • P. Seeling, F. H. P. Fitzek, and M. Reisslein, “Videometer,” Ieee network, p. 5, 2003.
    [BibTeX]
    @article{SeFiRe03,
    Author = {Patrick Seeling and Frank H.P. Fitzek and Martin Reisslein},
    Journal = {IEEE Network},
    Month = {jan},
    Optnumber = {1},
    Optvolume = {17},
    Pages = {5},
    Title = {VideoMeter},
    Year = {2003}}

  • P. Seeling, M. Reisslein, F. H. P. Fitzek, and S. Hendrata, “Video quality evaluation for wireless transmission with robust header compression,” in Proceedings of the ieee fourth international conference on information, communications & signal processing and fourth ieee pacific-rim conference on multimedia (ICICS-PCM 03), Singapore, 2003, pp. 1346-1350.
    [BibTeX] [Abstract]

    Robust header compression (ROHC), an IP header compression mechanism for wireless environments, was recently standardized by the Internet Engineering Task Force in RFC 3095 and an integral part of the 3GPP-UMTS specifications. In this paper we conduct a thorough performance evaluation of video transmission over wireless links with ROHC. We find that ROHC can achieve significant bandwidth reductions for wireless video transmission. We demonstrate that the achieved compression depends to a large degree on the video content. We also demonstrate that ROHC does not affect the video quality. This is in contrast to recent ROHC evaluations for wireless voice transmissions, which indicate that ROHC does improve the voice quality.

    @inproceedings{SeReFiHe03,
    Abstract = {Robust header compression (ROHC), an IP header compression mechanism
    for wireless environments, was recently standardized by the Internet
    Engineering Task Force in RFC 3095 and an integral part of the 3GPP-UMTS
    specifications. In this paper we conduct a thorough performance evaluation
    of video transmission over wireless links with ROHC. We find that
    ROHC can achieve significant bandwidth reductions for wireless video
    transmission. We demonstrate that the achieved compression depends
    to a large degree on the video content. We also demonstrate that
    ROHC does not affect the video quality. This is in contrast to recent
    ROHC evaluations for wireless voice transmissions, which indicate
    that ROHC does improve the voice quality.},
    Address = {Singapore},
    Author = {Patrick Seeling and Martin Reisslein and Frank H.P. Fitzek and Stefan Hendrata},
    Booktitle = {Proceedings of the IEEE Fourth International Conference on Information, Communications \& Signal Processing and Fourth IEEE Pacific-Rim Conference On Multimedia {(ICICS-PCM 03)}},
    Month = {dec},
    Pages = {1346--1350},
    Title = {Video Quality Evaluation for Wireless Transmission with Robust Header Compression},
    Volume = {3},
    Year = {2003}}

2002

  • F. H. P. Fitzek, P. Seeling, and M. Reisslein, “Reference models and related business cases for ad-hoc networks,” in Proceedings of the wireless world research forum 6 (wwrf6), London, UK, 2002.
    [BibTeX]
    @inproceedings{FiSeRe02,
    Address = {London, UK},
    Author = {Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein},
    Booktitle = {Proceedings of the Wireless World Research Forum 6 (WWRF6)},
    Month = {jun},
    Title = {Reference Models and Related Business Cases for Ad-Hoc Networks},
    Year = {2002}}

  • F. H. P. Fitzek, P. Seeling, and M. Reisslein, “Link level design issues for ip based multi–hop communication systems,” in Proceedings of the wireless world research forum 7 (wwrf7), Eindnoven, NL, 2002.
    [BibTeX]
    @inproceedings{FiSeRe02b,
    Address = {Eindnoven, NL},
    Author = {Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein},
    Booktitle = {Proceedings of the Wireless World Research Forum 7 (WWRF7)},
    Month = {dec},
    Title = {Link Level Design Issues for IP based Multi--Hop Communication Systems},
    Year = {2002}}

  • F. H. P. Fitzek, P. Seeling, and M. Reisslein, “Authentication and security in ip based multi–hop networks,” in Proceedings of the wireless world research forum 7 (wwrf7), Eindnoven, Netherlands, 2002.
    [BibTeX]
    @inproceedings{FiSeRe02a,
    Address = {Eindnoven, Netherlands},
    Author = {Frank H.P. Fitzek and Patrick Seeling and Martin Reisslein},
    Booktitle = {Proceedings of the Wireless World Research Forum 7 (WWRF7)},
    Month = {dec},
    Title = {Authentication and Security in IP based Multi--Hop Networks},
    Year = {2002}}

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