Patent ID: 8654665

Claim:
A mobile terminal comprising: a communication unit configured to receive from a base station multiple frames, each belonging to one of two or more frame types in a set order of priority; and a control unit configured to control the mobile terminal to perform a handover to the base station, based on a pattern of frame type of the multiple frames, wherein the handover comprises a pre-registration operation, a detachment/attachment operation, and a re-registration operation, wherein the control unit controls the detachment/attachment operation to be performed after the pre-registration operation is completed and a designated time period has passed, based on the pattern of frame types; wherein the control unit (i) predicts the time point at which a highest priority frame belonging to a frame type having the highest priority out of the multiple frames will be received after the time point at which the pre-registration operation is completed, (ii) predicts a time interval during which frame transmission/reception between the base station and the mobile terminal will be interrupted due to the handover being performed, and (iii) sets the designated time period, based on at least one of the time point at which the pre-registration operation is completed, the time point at which the highest priority frame will be received after the time point at which the pre-registration operation is completed, and the time interval during which the frame transmission/reception will be interrupted; and wherein the control unit (i) computes a first probability for receiving the highest priority frame before the detachment/attachment operation is completed, for a case of the detachment/attachment operation starting immediately after the pre-registration operation is completed, (ii) computes a second probability for receiving the highest priority frame before the detachment/attachment operation is completed, for a case of the detachment/attachment operation starting at a time point prior to the time point of receiving the highest priority frame at an interval tantamount to the time interval of the interruption of the frame transmission/reception, and (iii) sets the designated time period based on which of the first probability and the second probability is greater.