||Wireless Ad hoc Network is a self-organizing network. It consists of many mobile nodes and it is a dynamic topology network. It is an impermanent wireless network. It is not an infrastructure-based network, and can be deployed in a short time. Therefore, it can be highly used in some emergency situations, such as, in emergency rescue actions, in military …etc. As a result, multicast plays an important role here. But before putting it into applications, we have to consider some problems such as scalability, control overhead, data delivery ratio, and routing delay. Some approaches we have learned can’t resolve these problems.|
So, here we propose a new multicast routing protocol. It’s a kind of core-based multicast protocols. First, we divide whole network into several sub-networks called as cluster, and pick up a node as the cluster core node from each cluster, and this cluster core node will manage all member nodes in this area. All cluster core nodes will connect to each other. Source node in each cluster will send messages to the it’s cluster core-node and then the cluster core node will forward this message to other cluster core-nodes. Finally, the messages will be sent to the destination, member nodes of a multicast session.
In this multicast routing protocol, we reduce control packets by localization and lower control overhead. With localization, every nodes only have information from near-by nodes, and this reduce the delay time of routing effectively. More, localization does not increase too much nodes when a message travels from A to B and raise the data delivery ratio. And because of localization, whole network is scalability.