An efficient multicast protocol in mobile IPv6 networks

Mobile IPv6 provides two basic schemes called the remote subscription and home subscription to provide multicast service for mobile hosts. These two algorithms have complementary advantages. In this paper, we propose a new scheme called the previous network subscription, which can provide a low handover delay for real time multicast applications. We also propose a new multicast routing protocol called RHMoM (region based hierarchical mobile multicast) by combining the previous network subscription and the home subscription. RHMoM uses two kinds of agents and employs the region based hierarchical architecture to limit the reconstruction frequency of the multicast tree and optimize the delivery path. The simulation results show that RHMoM has better performance than the other mobile multicast solutions in mobile IPv6 network.