Patent ID: 8121087

Claim:
A method of performing a handover operation by a mobile subscriber station in a broadband wireless access system, the method comprising: receiving, from a serving base station, information regarding a period during which scanning of at least one neighbor base station is enabled; acquiring neighbor base station information by scanning and synchronizing with the at least one neighbor base station during the period based on the received information; transmitting a handover request message to the serving base station; transmitting the neighbor base station information to the serving base station after the handover request message is transmitted, the neighbor base station information including a base station ID and physical frequency information for each of the at least one neighbor base station; receiving, from the serving base station, information regarding a recommended target base station for the handover operation after the neighbor base station information is transmitted; and transmitting a service release request message to the serving base station after the information regarding the recommended target base station is received, wherein the recommended target base station is determined by the serving base station based on communications relating to quality of service (QoS) communicated between the serving base station and the at least one neighbor base station, wherein the communications relating to QoS include: a parameter, transmitted from the serving base station to the at least one neighbor base station, indicating a certain QoS; and information, transmitted from the at least one neighbor base station to the serving base station, indicating whether the certain QoS can be provided.