Patent ID: 7570618

Claim:
A method for controlling a handover of a mobile subscriber station by a serving base station in a broadband wireless access communication system which includes the mobile subscriber station, the serving base station for providing service to the mobile subscriber station, and neighbor base stations neighboring the serving base station, the method comprising the steps of: determining to perform a handover of the mobile subscriber station; sending to the neighbor base stations a first information related to types of service provided from the serving base station to the mobile subscriber station after determining to perform the handover of the mobile subscriber station; receiving from the neighbor base stations a second information related to types of service which can be provided by the neighbor base stations to the mobile subscriber station; transmitting to the mobile subscriber station a handover request signal, which contains an third information determined by reference to the second information received from the neighbor base stations; receiving from the mobile subscriber station a handover response signal indicating one neighbor base station selected by the mobile subscriber station among the neighbor base stations; and sending a handover notification confirm signal to the selected neighbor base station; wherein the third information signifies service level prediction information, which corresponds to any one service level prediction information from among a first service level prediction information is possible to provide all of services, a second service level prediction information is possible to provide a portion of the services and an third service level prediction information is not possible to provide any of the services in corresponding neighbor base station, and the mobile station performs the handover to the selected neighbor base station, and ranging with the selected neighbor base station through a predetermined frequency band.