Implementation Of Modified Fuzzy Priority Scheduler For MANET And Performance Analysis with mixed Traffic

In this paper, we investigate the performance of a fuzzy based Priority Scheduler in wireless Adhoc networks, with real time traffic under varying channel conditions. An Adhoc network is composed of mobile nodes connected by wireless links without any preexisting infrastructure. The network’s dynamic topology poses challenging problems for QoS routing. Hence a scheduling discipline can be used to transmit the packets before its expiry, which improves the QoS of the network. The traffic is expected to be a mix of real time traffic such as multimedia, voice, data traffic and file transfer etc. In this paper, it is proposed to modify the fuzzy scheduler to incorporate the channel conditions and introduce the fairness among various sources. The performance of the scheduler is studied using GloMoSim and is evaluated in terms of the quantitative metrics such as Packet delivery ratio, and average end-to-end delay. The results are verified for the unicast routing protocols such as Dynamic Source Routing protocol (DSR) and Adhoc on demand distance vector routing protocol (AODV), run over IEEE 802.11 as the MAC protocol and they prove that inclusion of the scheduler improves the Packet delivery ratio and reduces the end-to-end delay.