MOBILE COMMUNICATION METHOD AND ACCESS ROUTER

摘要

Disclosed is a technique for reducing signaling for reconfiguring a tunnel during mobile node movement when a normal mobile node is used and further reducing a packet loss. According to the technique, when a MN moves from a movement origin AR2 to a movement destination AR3, the NS transmitted from the MN to the AR2 is received by the AR3. The AR3 which has received the NS destined to the AR2 transmits "Location Update" to the AR2. The AR2 which has received "Location Update" creates "Prefix Information" by using an MN management table of the MN and returns it to the AR3. A tunnel is established between access routers of the AR2 and AR3 by using the "Prefix Information" and the packet destined to the MN is transferred to the MN via the tunnel.