Adaptive Core Based Scalable Multicasting Networks

Multicast is efficient way to distribute information from single source to multiple destination or many-to-many in communication networks. Mobile ad-hoc network needs special multicast routing protocol to adapt its characteristics including local broadcast capacity, arbitrary topology change, and bandwidth constraint and power limitation. A multicast routing protocol for mobile Ad-hoc network should find compromise between routing overhead and data transmission efficiency so that it can efficiently use bandwidth and power. For this aim, this paper proposes a new multicast routing protocol called Adaptive Core based Multicast Routing protocol (ACMP) which constructs and maintains a group-shared tree using adaptively selected core only when group traffic exists. ACMP attempts to react more quickly to broken tree edge by detecting link failures during data forwarding. Once a link failure is detected, this protocol uses local route recovery to establish a temporary route and periodical tree refreshing to maintain an optimal multicast tree. The performance of ACMP is evaluated via simulation.