Mobile Computing

13.7 Summary

MMP extends the Mobile IP with anycast address group technology for agent discovery, registration of mobile nodes and delivery of multicast packets. The utilization of anycast addresses for the mobility agent group can reduce the cost and delay when the mobile nodes register with mobility agents between subnets, without impacting its performance. In contrast to bi-directional tunneling and remote subscriptions, MMP is more efficient in terms of delivery delay and throughput of multicast packets. The cost of the employing anycast address/group is that the multicast routers involved in the group have to manage the anycast addresses. This management may be taken as setup cost and will not compromise the (runtime) dynamic performance of MMP. In this sense, MMP provides a performance extension for Mobile IP, especially when multicast services are desired.