Patent ID: 6529733
Filing Date: 2003-03-04
Classification: H04W

Abstract:
A handoff control system for performing a handoff processing for a mobile terminal that move across cells of a plurality of base stations while performing mobile communication, comprising;a mobile terminal which periodically measures a reception signal intensity of a radio signal used for a current communication, calculates a relative change value of reception signal intensity at measurement time intervals, and periodically reports the measured reception signal intensity and the calculated relative change value of reception signal intensity; and a base station which periodically receives and stores the reception signal intensity and the relative change value of reception signal intensity respectively reported from said mobile terminal, and performs a handoff processing by giving a higher priority to a handoff request of a mobile terminal for which the stored relative change value of reception signal intensity is larger and the stored reception signal intensity is weaker, wherein said base station comprises; a memory table which stores data of the reception signal intensity and the relative change value of reception signal intensity in association with each mobile terminal, and renews data in accordance with each periodical report; a plurality of queues to which priories based on relative change values of reception signal intensity are assigned in advance; a handoff request processing section which distributes a handoff request from each mobile terminal to one of the queues on the basis of the relative change value of reception signal intensity corresponding to the mobile terminal stored in said memory table; a queue sequence determination section which determines handoff processing orders for a plurality of handoff requests distributed in the same queue with giving a higher priority to a handoff request for which corresponding reception signal intensity stored in said memory table is weaker; and a queue control section which performs a handoff processing for a handoff request having a higher processing order waiting in the queue having a higher priority.