Queue Modelling and Jitter Control in Mobile Ad Hoc Networks

Abstract

Jitter in multimedia traffic is mainly introduced by variations in network characteristics. Ifjitter is so significant in the application that is receiving, this can result in a degraded performance in real-time multimedia communications applications. Jitter causes inaudible audio or unclear video which can be undesirable and uncomfortable to the user. Buffers are often employed to temporarily to store arriving packets before playing them at equal intervals to curb and minimize jitter. Jitter for voice packets should not exceed 20-50 milliseconds within a given stream. This paper proposes a method to reducejitter in intermediate nodes is proposed, such that when the packets arrive at the receiving end, there would be little or nojitter to process in the de-jitter buffer. We analyze M/G/1 nonpreemptive and pre-emptive resume priority queuing in the intermediate node and analyze how these models will affect delay and jitter. We found out that preemptive priority queuing performs better but almost the same to non-preemptive priority queuing. Both Priority based queues performed much better than the First in First out queue.