Enhanced Associativity-Based Multicast Routing protocol in CR Mobile Ad hoc Networks

This paper proposes an enhanced scheme based on Associativity-Based Multicast Routing (ABAM) for Cognitive Radio Mobile Ad Hoc Networks (CR MANET) to further improve the stability of the multicast tree. After carefully studying the original ABAM design, the enhanced scheme is proposed from two aspects. One is in the tree formation phase, while the other is for node mobility handling. Both the original ABAM and the new scheme EABAM (Enhanced Associativity-Based Multicast Routing) are simulated in self-developed OPNET-based platform. The results show that EABAM, with higher link break resistance, provides much better performance compared to ABAM when nodes are moving in CR MANET. Furthermore, the EABAM scheme optimizes the tree setup procedure and route recovery procedure to reduce the control overhead.