Patent ID: 7890106
Filing Date: 2011-02-15
Classification: H04W

Abstract:
1. A method of performing a handover operation in a wireless communication system, the method comprising: receiving a handover request message comprising a plurality of information elements from a mobile station at a serving base station through a first communication connection, wherein the serving base station provides the first communication connection; transmitting a handover pre-notification message for notifying the handover request message from the serving base station to a target base station; receiving a handover pre-notification response message comprising handover related information from the target base station in the serving base station in response to the handover pre-notification message; transmitting a handover response message from the serving base station to the mobile station, wherein the handover response message comprises the handover related information received from the target base station; performing a setup procedure to establish a second communication connection between the mobile station and the target base station while maintaining the first communication connection for a predetermined duration; and releasing the maintained first communication connection upon reception of a handover complete message from the target base station during the predetermined duration, the handover complete message notifying establishment of the second communication connection.