Patent ID: 8538432

Claim:
A method of executing a handover of a mobile station in a mobile communication system, the method comprising: receiving a registration message including control information associated with the handover during a network entry procedure, wherein the control information includes operation class information and enabled action information, wherein the operation class information designates at least one class among a plurality of classes of power-saving modes in which at least one handover-related operation is to be triggered, and wherein the enabled action information indicates whether the at least one handover-related operation is enabled for each of the designated classes by the operation class information among the plurality of classes of power-saving modes; changing an enabled status of at least one handover-related operation in the designated class by the operation class information among the plurality of power-saving modes when the mobile station enters the power-saving mode in which the mobile station operates; and performing at least one enabled handover-related operation in accordance with the control information based on a class of power-saving mode in which the mobile station operates.