Performance Evaluation of Queuing Management Algorithms in Hybrid Wireless Ad-Hoc Network

Abstract

Congestion is one of the problems that will reduce the performance of the networks. In wireless ad-hoc networks connected to the wired backbone through gateways. The performance will be affected due to the type of the routing protocol, and the queuing interfaces were used in the link between the wireless ad-hoc network and the wired backbone network through gateways, which will lead to delay in packet delivered ratio and packet loss in addition to reduce the network throughput. The technique of queue management is used to reduce the congestion rate to have successfully transferred data between any sources and destinations. In this paper, the effect of four queuing management algorithms, fairness queue (FQ), stochastic fairness queuing (SFQ), random early detection {RED) and random exponential marking (REM) will be evaluated on FTP application, based on IEEE802.11 MAC protocol. The algorithms will be simulated in the Hybrid wireless ad-hoc network using NS-2, and the results will be discussed in three scenarios; hybrid network, queuing area (gateways) and different bandwidth with dedicated simulation time, and packet size by measuring the packet delay, packet delivery ratio, and packet losses.