A novel hybrid ARQ algortithm for real-time video transport over wireless LAN

作者：Chen M^*; Wei G

来源：14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Beijing, 2003-09-07 To 2003-09-10.

DOI：10.1109/PIMRC.2003.1259154

• QoS
• ARQ forward error correction
• IEEE 802.11b
• H.26L video
• multimedia communication
• wireless local area networks

In this paper. we propose a modified MAC protocol supporting real-time video traffic over the IEEE 802.11 WLAN. Investigating H.26L real-time video transmission over wireless IEEE 802.11b LANs, we present a novel hybrid Automatic Repeat request (ARQ) algorithm that efficiently combines forward error control (FEC) coding with the ARQ protocol based on multiple transmission stages. The scheme includes: (1) multiple transmission stages with corresponding ARQ feedback information that determines how many transmission stages should be activated; (2) conditional frame skipping algorithm based on accumulated feedback information. Through analysis and simulation, we show that multiple-stages based Hybrid ARQ scheme has high error recovery rate for real-time video frames. In case of severe unreliable channel which causes losing a lot of IP packets, at the cost of little end-to-end delay's increase, we obtain a peak signal-to-noise ratio improvement tip to about 10dB compared to the hybrid ARQ proposed in \1\.

• 出版日期2003
• 单位华南理工大学