Experimental analysis of various protocols on VoIP traffic with different CODECs in Wireless LAN

Abstract

Voice over IP (VoIP) is the most popular growing Application layer protocol. In VoIP voice in the form of data packets are transmitted by using public networks such as the internet. In parallel, the use of Wireless LAN is also increasing in buildings, offices, airports. This paper shows the analysis of different routing protocols on VoIP traffic with different codecs in Wireless LAN. The impact of node density on the considered routing protocols was also evaluated. The increase in a number of nodes devalorizes voice quality. Some popular routing protocols, namely Dynamic Source Routing (DSR), Ad hoc On-Demand Distance Vector (AODV), Dynamic MANET On-Demand (DYMO) and Optimized Link State Routing (OLSR) have been used. Different QoS parameters like voice MOS, the end to end delay, voice jitter, throughput and packet delivery ratio are taken to evaluate the performance. The model is simulated using EXata/Cyber 2.1 simulator and emulator. The comparative study of different routing protocols will be conducted and the work provides a very good analysis for deciding the best routing protocol for internet based traffic in mobile ad hoc networks.