- P. Seeling, “Network Performance Evaluation of Microsoft Office Communications Server 2007,” in IEEE International Conference on Electro/Information Technology (EIT), Mankato, MN, USA, 2011.
[Bibtex]
@InProceedings{ See11,
title = "Network Performance Evaluation of Microsoft Office Communications Server 2007",
booktitle = "IEEE International Conference on Electro/Information Technology (EIT)",
author = "Patrick Seeling",
address = "Mankato, MN, USA",
month = may,
year = "2011"
}
- S. Haase and P. Seeling, “SOCKx – An Application Layer Network Switching Framework using SOCKSv5 Protocol Extensions,” in IEEE International Conference on Electro/Information Technology (EIT), Mankato, MN, USA, 2011.
[Bibtex]
@InProceedings{ HaaSee11,
title = "SOCKx - An Application Layer Network Switching Framework using SOCKSv5 Protocol Extensions",
booktitle = "IEEE International Conference on Electro/Information Technology (EIT)",
author = "Steffen Haase and Patrick Seeling",
address = "Mankato, MN, USA",
month = may,
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]
@InProceedings{ ShaSee11,
title = "Store-and-Forward in High Traffic Sensor Networks",
booktitle = "Proc. of the Computer Science Online Conference (CSOC)",
author = "Ambud Sharma and Patrick Seeling",
month = jan,
year = "2011"
}
-
![[PDF]](http://patrick.seeling.org/wp-content/plugins/papercite/img/pdf.png)
P. Seeling and M. Reisslein, “Video Trace Evaluation With H.264 Video Traces,” IEEE Communications Surveys & Tutorials, pp. tbd., 2011.
[Bibtex]
@article{SeeRei:2011,
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",
Pages = {tbd.},
title = "Video Trace Evaluation With H.264 Video Traces",
url = "http://patrick.seeling.org/publication-pdfs/jrn/H264VidTraceTut.pdf",
Year = 2011
}
- 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{ Seeling:2010,
title = "Web Conferencing Traffic - An Analysis using DimDim as Example",
author = "Patrick Seeling",
journal = "International Journal of Computer Networks and Communications",
pages = "1--11",
volume = "2",
number = "6",
month = nov,
year = "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 ACM Multimedia 2010 Workshop – Mobile Video Delivery (MoViD), 2010.
[Bibtex]
@InProceedings{ SeeFitErtPulRei10,
title = "Video Network Traffic and Quality Comparison of VP8 and H.264 SVC",
booktitle = "ACM Multimedia 2010 Workshop - Mobile Video Delivery ({MoViD})",
author = "Patrick Seeling and Frank H.P. Fitzek and Gergo Ertli and Akshay Pulipaka and Martin Reisslein",
location = "Florence, Italy",
month = oct,
year = "2010",
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."
}
- P. Seeling, “Work-In-Progress: Portable Student Lab Implementation,” in Proceedings of the ASEE/IEEE Frontiers in Education Conference (FIE), Washington, D.C., USA, 2010.
[Bibtex]
@InProceedings{ See10,
title = "Work-In-Progress: Portable Student Lab Implementation",
booktitle = "Proceedings of the ASEE/IEEE Frontiers in Education Conference ({FIE})",
author = "Patrick Seeling",
address = "Washington, D.C., USA",
month = oct,
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 Proceedings of the IEEE Consumer Communications and Networking Conference (CCNC), Las Vegas, NV, USA, 2010.
[Bibtex]
@InProceedings{ PulSeeReiKar10,
title = "Overview and Traffic Characterization of Coarse-Grain Quality Scalable (CGS) H.264 SVC Encoded Video",
booktitle = "Proceedings of the IEEE Consumer Communications and Networking Conference {(CCNC)}",
author = "Akshay Pulipaka and Patrick Seeling and Martin Reisslein and Lina J. Karam",
address = "Las Vegas, NV, USA",
month = jan,
year = 2010
}
- 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]
@InProceedings{ HopSee09,
title = "Security of Virtualized Applications: Microsoft App-V and VMware ThinApp",
booktitle = "Proc. of the Int. Joint Conferences on Computer, Information, and Systems Sciences and Engineering ({CISSE})",
author = "M. Hoppe and P. Seeling",
month = dec,
year = "2009",
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."
}
- 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]
@InProceedings{ SeeSta09,
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"
}
- 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{ FitSchPirPinKatHuuPenSee09,
title = "Robust Header Compression for WiMAX Femto Cells",
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",
publisher = "Wiley",
chapter = " ",
year = "2009",
isbn = "978-0-470-69680-4"
}
- 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]
@InProceedings{ See08,
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"
}
- P. Seeling, “Labs at Home,” ACM inroads – The SIGCSE Bulletin, vol. 40, iss. 3, 2008.
[Bibtex]
@Article{ See08-1,
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"
}
- 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]
@Article{ SchReiMaiSee08,
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"
}
- 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, pp. S4A1–S4A6.
[Bibtex]
@InProceedings{ ReiTylMatSeeRei07,
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})",
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. 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]
@Article{ andSorSchReiSeeHerMai07,
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. 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]
@Article{ SchSeeMaiRei07,
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]
@Article{ SchSeeMaiRei07-1,
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"
}
- P. Seeling, F. H. P. Fitzek, and M. Reisslein, Video Traces for Network Performance Evaluation, Springer, 2006.
[Bibtex]
@Book{ SeeFitRei06,
title = "Video Traces for Network Performance Evaluation",
author = "Patrick Seeling and Frank H.P. Fitzek and Martin Reisslein",
publisher = "Springer",
month = nov,
year = "2006",
isbn = "978-1-4020-5565-2"
}
- 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]
@InProceedings{ SeeRei06,
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, 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]
@Article{ SeeReiMadFit06,
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"
}
- 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]
@Article{ SchSeeMaiRei06,
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]
@Article{ ReiSeeRei06,
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, 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]
@Article{ SeeReiFit06-1,
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"
}
- 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]
@Article{ ReiAtkSeeRei06,
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’ 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 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]
@InProceedings{ SeeRei06-1,
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"
}
- 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]
@InProceedings{ SeeReiFit06,
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"
}
- 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{ SeeRei05-3,
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"
}
- 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]
@InProceedings{ SeeRei05-2,
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, pp. S3H1–S3H3.
[Bibtex]
@InProceedings{ ReiReiSee05,
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, pp. S1J1–S1J6.
[Bibtex]
@InProceedings{ ReiReiSeeYan05,
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"
}
- P. Seeling and M. Reisslein, “Evaluating Multimedia Networking Mechanisms Using Video Traces,” IEEE Potentials, vol. 24, iss. 4, pp. 21-25, 2005.
[Bibtex]
@Article{ SeeRei05,
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"
}
- 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, pp. S2H1–S2H2.
[Bibtex]
@InProceedings{ ReiSeeRei05,
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"
}
- 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]
@Article{ ReiSeeAtkRei05-1,
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’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.",
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, 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]
@Article{ SeeReiPdeRos05,
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"
}
- 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]
@Article{ SeedeCRei05,
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"
}
- 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]
@InProceedings{ SchSeeMaiRei05,
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]
@Article{ FitReiSeeRei05,
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]
@InProceedings{ SeeRei05-1,
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"
}
- 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]
@Article{ ReiSeeRei05-1,
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, 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{ ReiSeeAtkRei05,
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"
}
- 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]
@Article{ ReiSeeRei05-2,
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’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"
}
- 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]
@InProceedings{ KulSeeRei04,
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, 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{ FitSeeReiRugZor04,
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"
}
- 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]
@InProceedings{ FitSeeRei04,
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"
}
- F. H. P. Fitzek, S. Hendrata, P. Seeling, and M. Reisslein, “Video Streaming in Wireless Internet.” CRC Press, 2004.
[Bibtex]
@InBook{ FitHenSeeRei04-1,
title = "Video Streaming in Wireless Internet",
series = "Electrical Engineering \& Applied Signal Processing",
author = "Frank H.P. Fitzek and Stefan Hendrata and Patrick Seeling and Martin Reisslein",
publisher = "CRC Press",
year = "2004",
booktitle = "Mobile Internet: Enabling Technologies and Services",
chapter = "11"
}
- F. H. P. Fitzek, S. Hendrata, P. Seeling, and M. Reisslein, “Header Compression Schemes for Wireless Internet Access.” CRC Press, 2004.
[Bibtex]
@InBook{ FitHenSeeRei04,
title = "Header Compression Schemes for Wireless Internet Access",
series = "Electrical Engineering \& Applied Signal Processing",
author = "Frank H.P. Fitzek and Stefan Hendrata and Patrick Seeling and Martin Reisslein",
publisher = "CRC Press",
year = "2004",
booktitle = "Mobile Internet: Enabling Technologies and Services",
chapter = "10"
}
- 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]
@Article{ SeeReiKul04,
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"
}
- 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]
@InProceedings{ SeeReiFitHen03,
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"
}
- F. H. P. Fitzek, P. Seeling, M. Reisslein, and M. Zorzi, “ViTAN – Visualisation Tool for Ad hoc Networks,” IEEE Network, vol. 17, iss. 4, pp. 9, 2003.
[Bibtex]
@Article{ FitSeeReiZor03,
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"
}
- 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]
@InProceedings{ FitBadSeeSchHen03,
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"
}
- P. Seeling, F. H. P. Fitzek, and M. Reisslein, “VideoMeter,” IEEE Network, pp. 5, 2003.
[Bibtex]
@Article{ SeeFitRei03,
author = "Patrick Seeling and Frank H.P. Fitzek and Martin Reisslein",
journal = "IEEE Network",
month = "jan",
pages = "5",
title = "VideoMeter",
year = "2003",
optnumber = "1",
optvolume = "17"
}
- 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{ FitSeeRei02ab,
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{ FitSeeRei02a,
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"
}
- 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{ FitSeeRei02,
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"
}
