Patent ID: 7630340

Claim:
A handover method of the mobile IPv6 (Internet protocol version 6) comprising: a) a mobile node receiving a Layer 2 trigger message pre-notifying of a Layer 2 handover that has yet to occur; b) the mobile node requesting information on Layer 3 of a new access router (NAR) from a previous access router (PAR) by using information included in the Layer 2 trigger message; c) the mobile node receiving information on an IP address of the NAR and a unique, new care-of-address (NCoA) to be used when moving to the NAR from the PAR comprising an address pool storing and managing a handover address field; and d) the mobile node performing registration with a home agent (HA) of the mobile node and sending a binding update to an associated correspondence node (CN) by using the NCoA when a Layer 2 handover has occurred without requiring the HA to perform a duplicate address detection of the NCoA to reduce a handover latency.