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QoS over Wireless Local Area Networks

Research Student: Saty Mukherjee, M.Sc., B.Eng.

Supervisor: Dr. X Peng

The majority of wireless local area networks in use today are unable to support multiple services with different quality of service (QoS) requirements. Real time traffic such as Voice over Internet Protocol suffers from poor performance, in terms of Mean Opinion Score in the presence of other traffic such as File Transfer Protocol and hyper text transfer protocol. We investigate the performances of both the legacy Distributed Coordination Function (DCF) and the Enhanced Distributed Channel Access (EDCA) protocols, in order to identify the achievable benefits and limitations for the newly proposed MAC scheme. In particular, we examine the trade-off between prioritising and fairness in promoting QoS by providing service differentiation in EDCA. In addition to simulation, our work will be carried out over a real-world wireless network testbed, from which we are able to generate a noteworthy set of results for the evaluation of different MAC protocols for improving QoS in wireless networks.

Publications

S. Mukherjee, K. Jones, M. O’Shea, and X.-H. Peng, “The digital patient push – Using location to streamline the surgical journey,” in Proc. IEE 3^rd International Conference on Advances in Medical, Signal and Information Processing, July 2006.

S. Mukherjee, and X.-H. Peng, “Experimental investigation of IEEE 802.11e EDCA,” in Proc. IEEE 2^nd International Symposium on Advanced Networks and Telecommunications Systems, Dec. 2008.

R. Haywood, S. Mukherjee, and X.-H. Peng, “Investigation of H.264 video streaming over an IEEE 802.11e EDCA wireless testbed,” in Proc. IEEE International Conference on Communications (ICC), June 2009.

S. Mukherjee, X.-H. Peng, and Q. Gao, “QoS performances of IEEE 802.11 EDCA and DCF: A testbed approach,” in Proc. IEEE 5^th International Conference on Wireless Communications, Networking and Mobile Computing, Sept. 2009.