Patent ID: 8804556

Claim:
A method of a Base Station (BS) for controlling a handover of a terminal in a wireless communication system, the method comprising: transmitting measurement control information and Discontinuous Reception (DRX) control information to the terminal; receiving channel measurement information from the terminal; determining whether to perform handover of the terminal based on the channel measurement information received from the terminal; resetting the DRX control information of the terminal, in response to a determination to perform handover of the terminal; transmitting the reset DRX control information to the terminal; and transmitting handover indication information to the terminal, wherein the handover indication information is transmitted to the terminal while the terminal operates according to the connected DRX based on the received reset DRX control information from the BS; wherein transmitting the measurement control information and the DRX control information comprises: transmitting the measurement control information and the DRX control information to the terminal using at least one Radio Resource Control (RRC) connection reconfiguration message; wherein the DRX control information includes DRX deactivation time information, which is set such that the terminal does not transition to an inactive mode, until the terminal receives the DRX control information from the serving base station, after the terminal reports the channel measurement information to the serving base station.