Communications system, method and router for speeding up communication path changeover between communication terminals

摘要

A communications system has a relay station and a router connected to the relay station and a network, for allowing a communication terminal to send and receive IP packets through a virtual tunnel in a network. If a communication terminal that is newly connected to the relay station has performed communications with another relay station before the communication terminal is newly connected, then the relay station receives a pseudo address used by the other relay station through the router, and takes over the pseudo address as the address of a transmission port of a virtual tunnel.