Bound Multicast-based Registration Method

The mobile communications is blasting, and there are more andmore mobile terminals nowadays. According to EMC, the number ofmobile users has reached 1,354,000,000 in 2003. The wirelessnetworks based on packet-switch will replace that which based oncircuit-switch, so mobile IP is going to be the same important aswireless networks. In future 3G networks, mobile IPv6 is the mostcritical technology to all carriers, and is the essential elements forseamless handovers between 3G, Bluetooth and Wi-Fi.But, according to IETF RFC3775, When a mobile node accessesthe foreign network, it must register it's new CoA to the Home Agent.After receiving the BAck from the HA, the Mobile Node thenregisters it's new CoA to all Correspondent Nodes in turn. So, whilethe MN moves frequently or it leaves far away from the HA and CNs,there will be a lot of registering messages. The messages can cause along latency that leads to significant packet drop and throughputreduction. It's the key to MIPv6 that how to improve the performanceof handovers. And,some enterprises and institutes began to carry outresearches on this topic. Several drafts about it are released fromIETF, such as Fast Handovers for Mobile IPv6, Hierarchical MobileIPv6 mobility management (HMIPv6), MLD-DAD and so on.However, there's no draft talk about reducing the latency between theMN an CNs, especially the number of CNs is large.In this paper, a new registration process which makes use ofmulticast is introduced. The new process frees the MN fromregistering to each CN. The MN then can send the BUs to a tempmulticast address representes all of CNs, thus only once the MN needto register to CNs .The principle, implementation and performancehave been analyzed in this paper. And, using OMNeT++, thesimulations for MIPv6,HMIPv6 and M-MIPv6 are performed, theresults are also analysised.