Patent ID: 8112088

Claim:
A method for performing a handover by a mobile station in a communication system, the method comprising: transmitting a handover request message to a serving base station when it is detected that a handover is necessary; receiving a first handover response message from the serving base station, including a list of at least one neighbor base station capable of providing a service to the mobile station; determining a value of a handover indication type field from among at least two values individually indicating at least a handover cancel and a handover rejection; and transmitting a handover indication message including the determined value in the handover indication type field representing the handover rejection to the serving base station when the mobile station determines to reject the handover after receiving the first handover response message, wherein the value representing the handover cancel indicates that the mobile station intends to cancel handover procedure and resumes communication with the serving base station, and the value representing the handover rejection indicates that the mobile station intends to reject performing handover with any of the at least one neighbor base stations in the list.