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Efficient multicast video streaming over heterogeneous networks
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
2004 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Kista: Mikroelektronik och informationsteknik , 2004.
Series
Trita-IMIT-TSLAB. AVH, 04:04
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-510OAI: oai:DiVA.org:kth-510DiVA: diva2:14262
Available from: 2005-11-24 Created: 2005-11-24 Last updated: 2012-03-22
List of papers
1. Objective end-to-end QoS gain from packet prioritization and layering in MPEG-2 streaming
Open this publication in new window or tab >>Objective end-to-end QoS gain from packet prioritization and layering in MPEG-2 streaming
2002 (English)In: International Packetvideo workshop 2002, 2002Conference paper, Published paper (Refereed)
Abstract [en]

Layered video coding as well as prioritized packet scheduling are two well-known methods that may improve the quality of service level in real-time applications with high bandwidth requirements, and are used over packet switched networks. However, it is often difficult to get an idea of, and to quantify, the actual gains that may be achievable, especially from an end-to-end perspective.In this paper, we present some experimental results from using temporally layered MPEG-2 video combined with basic per-layer IP packet prioritization. The goal has been to find out if a basic scheme is useful at all in combination with this particular source coding method, and if so, how much the objective video quality can be increased during bandwidth-constrained periods. The quality is measured in terms of PSNR and the results are compared to the case of equal packet priority. Also, different packet sizes as well as packet queuing disciplines are used. We conclude that using even a relatively simple temporal layering strategy in combination with packet prioritization can quite significantly improve the end-to-end quality of MPEG-2 video, especially in moderately bandwidth constrained situations. Furthermore, packet size and queuing discipline is found to have an impact.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-8812 (URN)
Note
QC 20111219Available from: 2005-11-24 Created: 2005-11-24 Last updated: 2011-12-19Bibliographically approved
2. Receiver-controlled joint source/channel coding on the application level, for video streaming over WLANs
Open this publication in new window or tab >>Receiver-controlled joint source/channel coding on the application level, for video streaming over WLANs
2003 (English)In: The 57th IEEE Semiannual: 2003. VTC 2003-Spring, 2003, 1558-1561 p.Conference paper, Published paper (Refereed)
Abstract [en]

The proportion of real-time traffic, being transported over Internet protocol (IP) networks, appears to be ever increasing. Real-time traffic may, for example, be video and audio, which have real-time constraints such as maximum delay and delay jitter. Such requirements can be hard to satisfy in a wired infrastructure, and are even more so in a wireless network. Therefore there is a need to make transmission over wireless local area networks (WLANs) more reliable. The aim of this paper is to outline transmission of MPEG-4 video over an IEEE 802.11b WLAN, and to experimentally verify its efficiency. Receiver-driven layered multicast has been proposed before, for dealing with band limitations and environments with heterogeneous terminals. We extend these ideas to handle packet loss, by adding receiver-driven unequal error protection (UEP). The proposal can be viewed as receiver-controlled joint source/channel (JSC) coding on the application level.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-8813 (URN)10.1109/VETECS.2003.1207083 (DOI)
Conference
Vehicular Technology Conference
Note
QC 20111221Available from: 2005-11-24 Created: 2005-11-24 Last updated: 2011-12-21Bibliographically approved
3. Receiver-controlled dynamic forward error correction for video streaming
Open this publication in new window or tab >>Receiver-controlled dynamic forward error correction for video streaming
2003 (English)Report (Refereed)
Abstract [en]

The proportion of real-time traffic, being transported over IP networks, appears to be ever increasing. Real-time traffic may, for example, consist of video and audio data, which have real-time constraints in terms of metrics such as maximum delay, delay jitter and packet loss. Bounds on such metrics can be hard to satisfy by the network, hence there is an incentive to make multicast streaming of video more packet-loss resilient. Receiver-driven layered multicast has been proposed for dealing with band limitations, and environments with heterogeneous terminals. We have extended these ideas to handle packet loss, by adding receiver-driven forward error control (FEC). The aim of this paper is to further improve the performance, by optimizing the distribution of the error protection between the layers.

Keyword
Multicast, FEC
National Category
Computer Science
Identifiers
urn:nbn:se:kth:diva-8814 (URN)
Note
QC 20111219Available from: 2005-11-24 Created: 2005-11-24 Last updated: 2011-12-19Bibliographically approved
4. A bandwidth-allocation policy taking layered video multicast into consideration
Open this publication in new window or tab >>A bandwidth-allocation policy taking layered video multicast into consideration
2004 (English)In: Internet and Multimedia Systems and Applications / [ed] M.H. Hamza, Acta Press , 2004Conference paper, Published paper (Refereed)
Abstract [en]

As multicast is slowly gaining in support, the concept of multicast fairness is starting to attract some attention. Should multicast flows be favored at the expense of unicast flows, and if so to what extent? Allocating link bandwidth in proportion to the logarithm of the number of receivers of a flow has been proposed. That kind of policies favors multicast flows, without totally starving unicast flows. A problem of maintaining such policies emerges if layered multicast flows are introduced, since each layer is transmitted to a separate multicast IP address and will therefore be treated as an individual flow. Layered multicast flows will consequently be allocated too much bandwidth. In this paper, a logarithmic bandwidth-allocation policy that copes with layered multicast is proposed and evaluated through simulations. The results confirm that the proposal meets the expectations by preserving the intended fairness properties in scenarios with layered multicast traffic.

Place, publisher, year, edition, pages
Acta Press, 2004
Keyword
Multicast, Fairness, Bandwidth Allocation, Layered Video
National Category
Computer and Information Science
Identifiers
urn:nbn:se:kth:diva-8815 (URN)
Conference
Internet and Multimedia Systems and Applications, August 16 – 18, 2004
Note
QC 20111005Available from: 2005-11-24 Created: 2005-11-24 Last updated: 2011-10-05Bibliographically approved
5. Multicast-favorable max-min fairness: A general definition of multicast fairness
Open this publication in new window or tab >>Multicast-favorable max-min fairness: A general definition of multicast fairness
2005 (English)In: Proceedings - First International Conference on Distributed Frameworks for Multimedia Applications 2005, DFMA '05, 2005, 239-244 p.Conference paper, Published paper (Refereed)
Abstract [en]

As video-streaming services are becoming more common the benefit of multicast transmission is growing, because multicast is more bandwidth efficient than unicast in scenarios where many receivers simultaneously are interested in the same data. Of the same reason the concept of multicast fairness is starting to attract attention, it might be sensible to give multicast flows higher priority and thereby create an incentive for the use of multicast transmission. Allocating link bandwidth in proportion to the logarithm of the number of receivers of a flow, which favors multicast flows without totally starving unicast flows, has been proposed in [1]. That was however just as a bandwidth-allocation policy ran on the individual routers and not a definition of multicast fairness. To our knowledge no one has yet come up with a definition of multicast fairness which prioritizes multicast flows. In this paper we present a general multicast fairness definition, named multicast-favorable max-min fairness (MFMF), which can be used together with any multicast-favorable function.

National Category
Computer Science
Identifiers
urn:nbn:se:kth:diva-8816 (URN)10.1109/DFMA.2005.38 (DOI)000227802700032 ()0-7695-2273-4 (ISBN)
Conference
First International Conference on Distributed Frameworks for Multimedia Applications 2005, DFMA '05; Besancon; 6 February 2005 through 9 February 2005
Available from: 2005-11-24 Created: 2005-11-24 Last updated: 2011-09-21Bibliographically approved

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