Patent ID: 7522558

Claim:
A handover method comprising: prior to a handover: multicast-sending, by at least one first access router on an access network, access network interface information at a specific radio frequency toward a wired backbone network, the access network interface information including respective location information for the at least one first access router; determining, by a second access router, a value for a distance from the at least one first access router to a second access router, using the respective location information included in the access network interface information received via the backbone network; and generating, by the second access router, neighbor access network information according to the respective determined value for the distance from the at least one first access router to the second access router; when a mobile terminal on the access network performs the handover: notifying, by the second access router, the mobile terminal of candidate destination router information from at least a part of the neighbor access network information, and selecting, by the mobile terminal, a destination access router based on the candidate destination router information; wherein the access network interface information includes at least a respective address assigned to an access network interface; wherein the determining, by the second access router, includes determining whether the respective determined value for the distance of each of the at least one first access router to the second access router is within a range of a predetermined distance on the basis of the respective location information, to handle one or more of the corresponding access network interface information of the at least one first access router within the range of the predetermined distance as the respective neighbor access network information; and wherein the selecting, by the mobile terminal, includes selecting an access router having a shortest respective determined distance as the destination access router on the basis of the candidate destination router information.