Audio Codecs Impact on Quality of VoIP Based on IEEE802.16e Considering Mobile IP Handover

Abstract

A simulation model using OPNET tool is introduced for testing audio codecs impact on quality of VoIP based on IEEE802.16e with taking into account handover performance. Different parameters that indicate the quality of VoIP such as Throughput, MOS, End to End delay and traffic send and received. According to our simulation the acceptable MOS value is recorded for codecs G.711 and GSM-FR.