TY - GEN
T1 - Channel access protocol for video packets in IEEE 802.11 networks
AU - Kim, Jong Ok
AU - Tode, Hideki
AU - Murakami, Koso
PY - 2005
Y1 - 2005
N2 - The 802.11 DCF is contention-based channel access protocol, and medium access delay is highly increased with the number of stations in a service area. This severely affects on delay-sensitive video applications. In this paper, we focus on the MAC-layer solution for realizing high quality video transmissions in the 802.11 DCF networks. A new channel access protocol is proposed for real-time video, based on the timestamp (TS) of video packets. The TS information is carried by RTP header from the video application to the 802.11 MAC. For video packets with the same TS, they are simultaneously sent in a single channel access. Thus, additional contention and back-off processes can be avoided. 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. Simulation results show that the TS-based channel access achieves lower cumulative distributions of application-level video frame delay when compared to the DCF protocol.
AB - The 802.11 DCF is contention-based channel access protocol, and medium access delay is highly increased with the number of stations in a service area. This severely affects on delay-sensitive video applications. In this paper, we focus on the MAC-layer solution for realizing high quality video transmissions in the 802.11 DCF networks. A new channel access protocol is proposed for real-time video, based on the timestamp (TS) of video packets. The TS information is carried by RTP header from the video application to the 802.11 MAC. For video packets with the same TS, they are simultaneously sent in a single channel access. Thus, additional contention and back-off processes can be avoided. 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. Simulation results 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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U2 - 10.1109/WIRLES.2005.1549459
DO - 10.1109/WIRLES.2005.1549459
M3 - Conference contribution
AN - SCOPUS:34547854070
SN - 0780393058
SN - 9780780393059
T3 - 2005 International Conference on Wireless Networks, Communications and Mobile Computing
SP - 498
EP - 503
BT - 2005 International Conference on Wireless Networks, Communications and Mobile Computing
T2 - 2005 International Conference on Wireless Networks, Communications and Mobile Computing
Y2 - 13 June 2005 through 16 June 2005
ER -