Improving fairness in IEEE 802.11 networks using MAC layer opportunistic retransmission

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• 作者：B. Hagelstein ; M. Abolhasan ; D. Franklin ; F. Safaei
• 关键词：Opportunistic retransmission ; Cooperative diversity ; MAC ; Fairness
• 刊名：Computer Networks
• 出版年：9 December, 2013
• 年：2013
• 卷：57
• 期：17
• 页码：3410-3427
• 全文大小：3517 K

文摘

This paper introduces DAFMAC (Decode And Forward MAC), a scalable opportunistic cooperative retransmission enhancement for the IEEE 802.11 MAC protocol which operates without the need for additional explicit control signalling. Distributed opportunistic retransmission algorithms rely on selecting a single suitable relay without direct arbitration between nodes. Simulations show that DAFMAC offers a significant improvement in fairness for both throughput and jitter, giving multiple parallel data flows a more equal opportunity to utilise the channel. DAFMAC cooperative retransmissions are shown to reduce node energy consumption for a given throughput. Further, the DAFMAC relay selection algorithm is shown to scale very well in terms of complexity and memory requirements in comparison to other cooperative retransmission schemes.