Patent ID: 7362728

Claim:
A handover control apparatus comprising: gateway apparatus; a plurality of relay routers; a plurality of base stations having an access router apparatus, the access router apparatus adapted to control handover of a radio terminal unit between access routers provided in respective base stations for radio communication with the radio terminal unit by determining and using a crossover router; a counting unit configured to count a number of relay routers for every candidate access router for a destination of the radio terminal unit, from the gateway apparatus; a determining unit configured to determine the cross over router from among candidate cross over routers on the basis of a comparison of the number of relay routers for every access router counted by the counting unit, wherein the cross over router is the relay router or the gateway apparatus, the cross over router is configured to forward data to each candidate access router for a destination of the radio terminal unit on an occasion of the handover of the radio terminal unit, and the cross over router is closest to the radio terminal unit in a hierarchy in terms of the number of relay routers from the gateway apparatus to a destination candidate access routers being a minimum.