PERFORMANCE EVALUATION OF MULTICAST ROUTING PROTOCOLS IN MOBILE AD HOC NETWORKS

摘要

A Mobile Ad hoc Network (MANET) is a wireless network with mobile terminals that are able to form a temporary network without wired infrastructure and centralized administration. Due to its open architecture and mobility features, MANET is in demand by researchers and industries for various application areas. Multicasting is mainly used for group-oriented computing, which can reduce communication costs, processing overhead and delivery delay. Many application such as disaster management, emergency relief, distributed database and multimedia applications like video conferencing, video-on-demand services require multicast communication. Various multicast routing protocols are available to support such multicast communications. MANET's Inherent characteristic such as unpredictable node density, node mobility and dynamic communication environment generates challenges to provide an efficient multicast routing protocol. A tree based multicast protocol MAODV and mesh based multicast protocol ODMRP are compared for performance metrics with different network situations. Performance evaluation is done for packet delivery ratio, average end-to-end delay, routing overhead and throughput with CBR and multimedia traffic for varying node density, number of senders, multicast group size and node mobility.