Patent ID: 8626169

Claim:
A method of performing a handover at a mobile station (MS) in a wireless communication system, the method comprising: transmitting, by the MS to a serving base station (serving BS), a message for a scanning request including a preamble index of a detected at least one femto base station (femto BS); receiving a scanning interval and a list of at least one accessible neighbor femto BS by the MS from the serving BS, wherein the list of the at least one accessible neighbor femto BS is formed based on the preamble index; scanning by the MS for the at least one accessible neighbor femto BS in accordance with the scanning interval; transmitting, to the serving BS by the MS, a message including an identifier of at least one femto BS detected by the MS through the scanning, frequency information of a frequency used by the detected at least one femto BS and a measurement result for the detected at least one femto BS; receiving, by the MS from the serving BS, a list of at least one femto BS in response to the message, wherein the list of the at least one femto BS is formed based on the frequency information, the measurement result, or the identifier; and performing by the MS a handover to a femto BS of the at least one femto BS in the list.