MOBILE COMMUNICATION METHOD AND MOBILE COMMUNICATION APPARATUS

摘要

A mobile communication apparatus comprising a registry request part (47) for requesting a position registry from a terminal at the other end of communication; a BU list memory (45) for holding a list of such terminals that have registered their positions; an handover detection part (41) for detecting the commencement of an handover; and a registration cancellation part (46) for canceling, in response to a notification from the handover detection part (41), the position registration of the corresponding terminal in the BU list; wherein at the commencement of a handover, if the path through which to communicate with the corresponding terminal registered in the BU list has been optimized, the path optimization is cancelled by transmitting a cancellation request to the terminal, whereby the loss of packets to be transmitted from the terminal can be reduced during the handover.