Mobility support for mobile networks will be more important as the mobile Internet becomes increasingly popular. To support mobile networks, the concept of prefix scope binding (PSB) is being discussed in IETF; however, by only applying this concept to Mobile IPv6 (MIP), the problem of packet loss still remains. In this paper, we apply the PSB concept to our proposed protocol, the Hierarchical Mobile IPv6 extension with buffering function (HMIP-B), in which mobility anchor points buffer packets destined to the mobile hosts during handoff. We compare MIP and HMIP-B based on the handoff performance related to mobile networks by computer simulation. The simulation results indicate that our proposal improves the handoff performance in both TCP and UDP communications.

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Mobile IPv6 supports packet routing for hosts moving on the Internet, but lacks support for networks moving on the Internet. For example, a network comprising a set of hosts and routers in a train can be a mobile network. While the mobile network is moving, a router in the network changes its point of connection to the Internet. This paper proposes an architecture and Mobile IPv6 extensions that support packet routing for mobile networks. The proposed scheme enables any host on a mobile network to communicate with any host connected to the Internet.

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