IEEE 802.11 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.
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Jong-Ok KIM, Hideki TODE, Koso MURAKAMI, "MAC-Layer Support for Real-Time Video over IEEE 802.11 DCF Networks" in IEICE TRANSACTIONS on Communications,
vol. E89-B, no. 4, pp. 1382-1391, April 2006, doi: 10.1093/ietcom/e89-b.4.1382.
Abstract: IEEE 802.11 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.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e89-b.4.1382/_p
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@ARTICLE{e89-b_4_1382,
author={Jong-Ok KIM, Hideki TODE, Koso MURAKAMI, },
journal={IEICE TRANSACTIONS on Communications},
title={MAC-Layer Support for Real-Time Video over IEEE 802.11 DCF Networks},
year={2006},
volume={E89-B},
number={4},
pages={1382-1391},
abstract={IEEE 802.11 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.},
keywords={},
doi={10.1093/ietcom/e89-b.4.1382},
ISSN={1745-1345},
month={April},}
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TY - JOUR
TI - MAC-Layer Support for Real-Time Video over IEEE 802.11 DCF Networks
T2 - IEICE TRANSACTIONS on Communications
SP - 1382
EP - 1391
AU - Jong-Ok KIM
AU - Hideki TODE
AU - Koso MURAKAMI
PY - 2006
DO - 10.1093/ietcom/e89-b.4.1382
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E89-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2006
AB - IEEE 802.11 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.
ER -