Hand over system null of the movement terminal main leadership in the cellular communication system which includes the ranking

摘要

PROBLEM TO BE SOLVED: To perform handover led by a mobile terminal, by informing a mobile terminal of increase/decrease information on a handover threshold as informative information from a base station and increasing/decreasing a reception signal level from each base station at the mobile terminal based on the informative information from each base station. ;SOLUTION: Base station devices 11, 12 and 13 regularly inform a mobile terminal 10 of information that cells 16 and 17 are the normal cell and a cell 18 is the hieralchical cell for traffic supplement. The mobile terminal 10 is busy via the base station 11 in the normal cell 16 and approaches the normal cell 17 and the hierarchical cell 18 by accompanying movement of the mobile terminal 10. The mobile terminal 10 reaches a threshold for handover adding by adding a margin to the reception level from the base station device 13. The mobile terminal 10 performs a diversity handover addition request to a diversity handover trunk(DHT) 15 and the DHT 15 performs transmission/ reception of a radio wave from both the base station devices 11 and 13.;COPYRIGHT: (C)2000,JPO