OVERLAY NETWORK NODE, MOBILE NODE, AND MOBILE ROUTER

摘要

Disclosed is a technique for suppressing generation of redundant signaling associated with a process for establishing route optimization. An overlay network is formed on a network. A pHA (proxy home agent) (124) provides a home agent overlay network service. An MR (mobile router) (130) and a VMN (visit mobile node) (140) both participate in the overlay network service. Here, when the MR performs a process for optimizing a route to the home agent of the VMN, for example, the pHA transmits change HA messages (216, 218) to the VMN so that it changes its home agent to the home agent of the MR. When the VMN has changed the home agent to the home agent of the MR, the MR can know that there is no need of performing a process for optimizing the route to the home agent of the VMN.