An on-demand source based clustering multicast routing protocol in Ad Hoc network

As the number of source node increases, the overhead of ordinary multicast routing protocol like ODMRP will increase rapidly. Because every source node will periodically flooding in order to get and refresh the information of networks topology. To reduce the overhead of rebroadcast from the source nodes, we propose an efficient on-demand source based multicast routing protocol (ODSCMP) in Ad Hoc network. ODSCMP reduces the control overhead by dynamically classifying the sources into cluster, the head of cluster will deliver the multicast data packets of the other source to the destination. The source that is not a cluster head node will not flooding control packets periodically to get the routing information. All the works to establish and maintain the multicast route will be done only by the cluster head node. We study the effectiveness of the proposed multicast routing protocol by simulation studies and the results show that the multicast efficiency is better than ODMRP and packets delivery ratio is also improved at high network load. Simulation results show that the protocol is characterized with its quick convergence and low maintenance costs of routing, robust and efficient flooding platform over dense, large mobile networks.