Performance Analysis of FIFO And Priority Packet Queuing Mechanisms In MANETs

Abstract

Prudent resource allocation in Mobile Ad Hoc Networks (MANETs) requires scheduling mechanisms that manage buffering of packets during waiting time. Various scheduling algorithms may be implemented to govern packet transmission and control packet loss. Such mechanisms include first-in-first-out (FIFO), priority queuing (PQ), and weightedfair queuing (WFQ). In this paper, a comparison is made between use of FIFO and PQ mechanisms in a mixed traffic scenario (file transfer and VoIP applications). PQ is implemented on the basis of packet Type of Service (ToS) with VoIP data packets being given the upper hand. It will be shown that PQ gives a better Quality of Service (QoS) as opposed to
FIFO. This can be observed via the results of the simulations. OPNET simulator is utilized in this paper.