Analysis of VoIP over Ad hoc Networks

Voice Over Internet (VOIP) is a rising popular Internet application that offers good services by Mobile Ad-hoc Network (MANET). MANET offers a appropriate platform for the deployment of multimedia and voice session over IP network in various application scenarios that provides safety to comfort related services. But this network also faces many issues on QoS because of packet drop, due to transmission errors, small battery life and dynamic changing configurations. WiMAX is a next generation wireless technology, presently utilizing by several institutions and industries which offers various benefits because of its large coverage area and high speed. Aggregating these techniques together, in this paper we measured the performance of several VOIP codec’s with WiMAX in many scenarios (dense and sparse) over MANET. Voice codec’s are formulated with some QoS metrics i.e. average jitter, average MOS, average delay, average throughput and signal obtained with error. The quality and performance of VOIP applications employing H.323 signaling protocol in Qualnet 6.1 modeler are analysed in order to find their impact on QoS and discover most effective network particular voice codec .