Cross-layer Packet Scheduling Framework with QoS Mapping for Real-time Video in CSMA/CA Based Networks

This paper proposes a cross-layer packet scheduling framework with QoS （Quality of service） mapping to provide UEP （Unequal error protection） at both application and MAC （Medium access control） layers by investigating the CSMA/CA （Carrier sense multiple access with Collision avoidance） protocol from...

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Published in:电子学报：英文版 2009-04, Vol.18 (2), p.285-290
Main Author: XIAO Hongjiang DAI Qionghai
Format: Article
Language:English
Subjects:
CSMA
S映射
分组调度
实时视频
载波侦听多路访问
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creator XIAO Hongjiang DAI Qionghai
description This paper proposes a cross-layer packet scheduling framework with QoS （Quality of service） mapping to provide UEP （Unequal error protection） at both application and MAC （Medium access control） layers by investigating the CSMA/CA （Carrier sense multiple access with Collision avoidance） protocol from the queue theory. We take full advantage of the rate-adjustability of shortened-and-punctured RS （ReedSolomon） codes, and discuss three essential aspects of the framework： the packet loss probability under both FEC （Forward error correction） and delay constraint, the mapping mechanism from packets loss distortion to retransmission limit, and the congestion-aware scheduling algorithm. Besides, a reservation factor for queue space is introduced to restrain the negative effect of burst behavior of the parity packets. Simulation results indicate that the performance of our scheme is superior to the conventional methods.
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We take full advantage of the rate-adjustability of shortened-and-punctured RS （ReedSolomon） codes, and discuss three essential aspects of the framework： the packet loss probability under both FEC （Forward error correction） and delay constraint, the mapping mechanism from packets loss distortion to retransmission limit, and the congestion-aware scheduling algorithm. Besides, a reservation factor for queue space is introduced to restrain the negative effect of burst behavior of the parity packets. 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subjects CSMA
S映射
分组调度
实时视频
载波侦听多路访问
title Cross-layer Packet Scheduling Framework with QoS Mapping for Real-time Video in CSMA/CA Based Networks
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