Patent ID: 8711807

Claim:
A method for compensating Quality of Service (QoS) during a handover of a Mobile Station (MS) by a serving Base Station (BS) in a wireless broadband access system, the method comprising: generating a message during a handover from the serving BS to a target BS, the message including a data transmission/reception time just before the handover and at least one of a size of a time window for which a data transmission/reception history is recorded in an accumulated way and an amount of data transmitted/received during the time window; and transmitting the message to the target BS, wherein the message is used to calculate at least one of a handover break time and data rate during the handover break time at the target BS, in order to compensate the QoS, and wherein if it is determined, by the target BS, that there is a grant that the target BS has failed to transmit/receive during the handover break time, the failed grant is compensated by the target BS.