Scalable multicast routing protocols for mobile ad hoc network

In MANET mobile nodes are able to communicate with neighboring nodes either one hop away or a few hops away from the source node. As the network size grows, the performance of the transmission will be degraded due to network congestion and network splitting. Due to the increased route length between two end nodes in a multi-hop MANET, the challenge is in the limited scalability despite the improved spatial diversity in a large network area. The density and the mobility factors may influence the scalability of the ad hoc routing protocols. This paper present review on the scalable multicast routing protocols and intend to include the survey fall into three categories: Zone based, mesh based and group management scheme and further this paper compares the scalability properties and operational features of the protocols and discusses challenges in future routing protocol designs.