Grid Location-based Multicast Routing Protocol In MANET

In recent years, wireless network technology has been developed rapidly. With feature of quickly installation and no infrastructure, MANET is attracting more and more attention. In MANET network system, mobile node is client but also router, which brings challenge to the route finding, selecting, preserving process. And what's more, dilemma appears in multicast routing process.In this paper, a location-based multicast routing protocol is presented. Mobile nodes get their location information easily by GPS. By using location information, routing protocol's efficiency of finding and selecting route is greatly improved. We use location information for dividing entire network into grid zone with fixed size. Each grid has a unique grid label id. According to the label id, entire network can be divided into high-channel sub-network and low-channel sub-network. Destination nodes are partitioned into groups by using location information and grid label ids. Group members are saved in packet's header. According to the order of destinations in packet's header, multicast is done by sending packet to destinations one by one. Group dividing is done only within source node, a forwarding node just sends packet to destination(or next destination) without any other computing consuming.NS-2(Network Simulator) is used for simulating and testing the protocol, we use the following metrics: PDR(Packet Delivery Ratio), Average End-to-End Delay and Costing to study and analyze our protocol.