MAC-Layer Support for Real-Time Video over IEEE802.11 DCF Networks(Multimedia Systems for Communications)
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概要
- 論文の詳細を見る
IEEE802.11 DCF is a contention-based channel access protocol, and medium access delay greatly increases as the number of contending stations in a service area increases. This severely affects on delay-sensitive video applications. In this paper, we focus on MAC-layer solutions for realizing high quality video transmission in 802.11 DCF networks. A new channel access protocol based on the timestamp (TS) of video packets is proposed for real-time video. The TS information is carried by RTP header from the video application to 802.11 MAC. For video packets with the same RTP TS, they are simultaneously transmitted in a single channel access. Additional contention and back-off processes can be avoided because the whole packets of a video frame are completely delivered. The proposed TS-based access protocol can be easily implemented by the DCF with packet bursting. In addition, it is backward compatible to the legacy DCF. Extensive simulations show that the TS-based channel access achieves lower cumulative distributions of application-level video frame delay when compared to the DCF protocol.
- 社団法人電子情報通信学会の論文
- 2006-04-01
著者
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Kim Jong-ok
Atr Adaptive Communications Research Laboratories Dept. Of Autonomous Systems
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TODE Hideki
Department of Information Networking, Graduate School of Information Science and Technology, Osaka U
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MURAKAMI Koso
Department of Information Networking, Graduate School of Information Science and Technology, Osaka U
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KIM Jong-Ok
Department of Information Networking, Graduate School of Information Science and Technology, Osaka U
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Kim Jong-ok
Department Of Information Networking Graduate School Of Information Science And Technology Osaka Uni
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Tode Hideki
Department Of Computer Sciences And Intelligent Systems Graduate School Of Engineering Osaka Prefect
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Tode Hideki
Department Of Computer Science And Intelligent Systems Graduate School Of Engineering Osaka Prefectu
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Tode Hideki
Graduate School Of Information Science And Technology Osaka University
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Murakami Koso
Department Of Information Networking Graduate School Of Information Science And Technology Osaka Uni
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Murakami Koso
Department Of Information Networking Graduate School Of Information Science And Technology Osaka Uni
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