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QOAR: Adaptive QoS Scheme in Multi-Rate Wireless LANs

8 years 8 months ago
QOAR: Adaptive QoS Scheme in Multi-Rate Wireless LANs
—With the availability of multiple rates in IEEE 802.11a/b/g wireless LANs, it is desirable to improve the network capacity and temporal fairness by sending multiple consecutive frames over high rate links, as proposed in opportunistic auto rate (OAR [1]). However, the basic OAR does not provide quality of service (QoS) guarantee and thus is not sufficient in supporting real time voice/video traffic. In this paper, we further enhance the OAR protocol with a set of QoS mechanisms. The proposed QOAR protocol consists of two protocols: (i) a trafficdifferentiating flow weight adaptation protocol (FWA) that dynamically tunes both contention window and concatenation number per channel access; (ii) an admission control protocol (AC) that guarantees the bandwidth/delay requirements of multimedia services. Extensive simulation studies show that QOAR enables QoS for real-time traffic yet maximizes performance of best effort traffic. Keywords-multi-rate, wireless LAN, multimedia, QoS
Ming Li, Yang Xiao, Hua Zhu, Imrich Chlamtac, Bala
Added 30 May 2010
Updated 30 May 2010
Type Conference
Year 2008
Where ICC
Authors Ming Li, Yang Xiao, Hua Zhu, Imrich Chlamtac, Balakrishnan Prabhakaran
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