Adaptive optimization of EDCA parameters for improved QoS in multi-media applications

Authors : Alparslan ÇİL, Mehmet AKAR, Emin ANARIM

Pages : 1369-1388

View : 15 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :IEEE 802.11e Enhanced Distributed Channel Access insert ignore into journalissuearticles values(EDCA); has been incorporated into the standard as an effective medium access mechanism in order to provide the desired QoS for multimedia applications such as VoIP and IPTV. This paper presents an adaptive optimization algorithm in EDCA which strives to provide improved QoS from both delay and throughput perspectives. As a first step towards this goal, a Markov model of the EDCA mechanism has been introduced, which is subsequently used to compute the estimates of throughput and delay. Based on the analytical model that is validated via real-time simulations in OPNET, a new algorithm is proposed that maximizes throughput while decreasing delay and minimizing collision probability for a higher access category.
Keywords : Distributed channel function, enhanced distributed channel access, IEEE 802 11e, wireless video