Towards the Enhancement of QoS in 802.11e for Ad Hoc Networks

摘要

Multimedia applications running over Ad hoc networks must achieve some level of performance QoS guarantees. This topic is very broad and there is an extensive pool of solutions in the literature. For the last few years, works on enhancing Quality of service at MAC layer in wireless networks, have attracted tremendous research efforts. In this paper, we examine the QoS issue of MAC layer in Ad hoc networks. We present a state-of-the-art review and a comparison of typical enhancements of distributed versions of both 802.11 and 802.11e standards, designed first to work in infrastructure wireless networks. We start our work by highlighting problems of deploying the original algorithms in a distributed architecture such as MANETs. Then, we propose an enhancement of the 802.11e in order to improve the QoS and correct the reactivity of this standard when network conditions become highly disturbed.