A reliable region based hierarchical mobile multicast protocol for IPv6 network

We propose a basic mobile multicast scheme in Mobile IPv6 called previous network subscription (PS). In PS, when a mobile host moves to a new foreign network, it will build a bi-directional tunnel with its previous network, so mobile host can continue to receive multicast packets soon after handover. We also propose a new reliable mobile multicast protocol called RRHMoM (Reliable Region based Hierarchical Mobile Multicast). It combines PS and remote subscription (RS). Hierarchical architecture is adopted in RRHMoM. The acknowledge mechanism combines NAK and ACK Simulation results show that RRHMoM has better performance than existing reliable mobile multicast protocols.