Patent ID: 8331932
Filing Date: 2012-12-11
Classification: H04W

Abstract:
1. A wireless communication system having wireless base stations which belong to a hierarchical location registration area wherein the wireless communication system accepts location registrations from mobile stations in order to perform mobile station location management, the wireless communication system comprising: a first wireless base station group which belongs to the hierarchical location registration area and an another hierarchical location registration area which overlaps the hierarchical location registration area and having a transmitting unit operable to transmit, to mobile stations, area information which indicates that the first wireless base station group belongs to an overlap region of both the hierarchical location registration area and the another hierarchical location registration area, and transmit a parameter which allows lengthening of selectable delay times by which the mobile station delays location registration in the another hierarchical location registration area which overlaps the hierarchical location registration area, wherein the time by which location registration is delayed by the mobile station is changed according to a size of the overlap of the hierarchical location registration areas; and a second wireless base station group which belongs to the hierarchical location registration area and does not belong to the another hierarchical location registration area, and having a transmitting unit operable to transmit, to mobile stations, another area information which indicates that the second wireless base station group belongs to the hierarchical location registration area and does not belong to the another hierarchical location registration area, wherein the first wireless base station group and the second wireless base station group are included in the wireless base stations.