MAC protocol using cooperative active relays in multi-rate wireless LANs

Authors:
Chang-Yeong Oh;Tae-Jin Lee
Affiliations:
School of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea
Venue:
WOCN'09 Proceedings of the Sixth international conference on Wireless and Optical Communications Networks
Year:
2009

Citing 3
Cited 1

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Abstract

In Wireless Local Area Networks (WLANs) based on IEEE 802.11 families such as a/b/g, mobile stations can automatically adjust transmission rates according to channel conditions. However throughput performance degradation is observed by low-rate stations in multi-rate circumstances resulting in so called performance anomaly. There have been many studies to solve this type of degradation and recent researches introduce efficient techniques using cooperative communications to enhance throughput. In this paper, we propose Active Relay-based Co-operative Medium Access Control protocol (AR-CMA9. AR-CMAC protocol uses active relays deslnng to transmit their own data for cooperation in contrast to other existing MAC protocols and is designed to increase throughput. Simulations in an infrastructure network with an AP show drastic improvement approximately 2 times than the legacy IEEE 802.11b with RTSICTS in terms of throughput.