Patent ID: 7593731

Claim:
A method for performing a handover of a Mobile Subscriber Station (MSS) by a serving Base Station (BS) in a Broadband Wireless Access (BWA) communication system including the MSS, the serving BS, and a plurality of neighbor BSs, the method comprising the steps of: transmitting, to the MSS, a handover request message including information on at least one recommended BS to which the MSS can perform handover, among the neighbor BSs, and an information field indicating whether a network assisted handover is supported; receiving, from the MSS, a handover indication message including an Identifier (ID) field of a target BS; receiving information indicating a completion of a handover process of the MSS from a selected target BS determined by the MSS among the at least one recommend BS; and transmitting a notification for ordering a release of a resource allocated to the MSS, to the other at least one recommended BS, excluding the selected target BS from the at least one recommended BS, wherein the network assisted handover indicates that the MSS may perform a handover to the selected target BS among the at least one recommended BS without notifying the serving BS of the selected target BS, wherein the ID field of the handover indication message is set to a predefined value that does not indicate a certain target BS, when the information field indicates the network assisted handover is supported.