Performance evaluation of VoIP calls over MANET for different voice codecs

The performance and quality of VoIP calls conducted through a Mobile Ad Hoc Network (MANET) having a number of SIP wireless nodes registered on a SIP Proxy are evaluated. The measurement campaign is conducted in an indoor corridor environment at a university campus. The voice codecs used to conduct the calls are G.711, G.727 and G.723.1. These codecs are mainly used in VoIP technologies. The calls' quality is evaluated using four QoS metrics which include the mean opinion score (MOS), jitter, delay, and packet loss. According to the experimental results, voice codec G.711 provides the best performance in this indoor environment.