OPTIMIZED ROUTE REQUEST ALGORITHMS FOR ON DEMAND MULTICAST ROUTING PROTOCOL

Multicast provides a more efficient routing strategy for multimedia applications in mobile environments with large numbers of simultaneous receivers. Many multicast routing protocols of MANET operates in an On-Demand basis. Multicast Routing Protocol relies on periodic, network-wide flooding for route discovery and maintenance. While forwarding the packets the Packet Delivery Ratio (PDR) is a critical metric to be considered. Many methods were proposed to improve PDR which in turn will improve the reliability of transmission in MANET. By handling request (JOIN-QUERY) and reply (JOIN-REPLY) phases in an opportunistic way, the intermediate node's forwarding mode can be changed. This paper proposes algorithms to improve PDR and power consumption of the nodes in an optimal fashion. The results obtained confirmed that a medium network of size 20 to 50 can give best performance by following the proposed algorithms.