Patent ID: 8064381

Claim:
A method of calculating uplink output power in a wireless communication system, the method comprising: receiving a message which includes a command to a mobile station (MS) to perform a handover from a first cell, the first cell serving as a current serving cell, to a target cell, which is one of one or more neighbor cells; performing the handover to the target cell according to the message in a packet transfer mode; measuring, by the MS, a power of a broadcast control channel (BCCH) in the target cell after the MS is handed over to the target cell; and calculating the uplink output power by re-starting a running average filter that considers only the measured power without previously measured powers from the first cell when the measured power is used to perform an initial calculation of the uplink output power after the MS is handed over to the target cell, wherein the running average filter is represented by C n =(1−b)*C n−1 +b*SS n , where SS n denotes the measured power of the BCCH, b denotes a forgetting factor, and n is an iteration index.