Patent ID: 8634831

Claim:
A method of scanning a neighbor base station by a mobile station in a broadband wireless access system, the method comprising: receiving a scan response (AAI_SCN-RSP) message including information of a first duration, a first interval for the mobile station to receive a preamble of the neighbor base station from a serving base station and a second interval for the mobile station to perform a data exchange with the serving base station, wherein the first duration includes at least one second duration, wherein each of the at least one second duration includes the first interval and base station (BS) switching times located before and after the first interval, wherein each of the at least one second duration is allocated on three consecutive downlink subframes, and wherein each of the BS switching times corresponds to a length of a subframe; and receiving the preamble from the neighbor base station in the first interval, wherein the first interval is a scanning interval, and wherein the first interval is set in units of the subframe.