| 摘要 |
PURPOSE: A method for deleting location register information of a VLR(Visitor Location Register) in a mobile communication switching center is provided to cancel a call source by force when there is a call source in which a source allocation is not canceled by abnormal termination at the VLR. CONSTITUTION: When a subscriber performs a location registration at a prior switching center, then terminates a call abnormally, moves to a current switching center, and requests a location registration, the current switching center requests a location registration to an HLR(Home Location Register). Then the HLR requests cancellation of the location registration information to an LEI(Location register External Interface) of the prior switching center(S101). The LEI cancels location registration information of the corresponding subscriber and notifies it to the VLR(S102). Then, the LEI requests an audit about the subscriber who cancelled the location register information to an MPC(Mobile Paging Controller)(S103). The MPC searches a subscriber state table, checks the call state of the corresponding subscriber(S104) and requests cancellation of the call source by discriminating the call state of the subscriber to an MCC(Mobile Call Controller)(S105). The MCC requests cancellation of the call to an MSA(Mobile station Signalling Access unit)(S106), so that the MSA cancels the source allocated to the corresponding subscriber. The MSA notifies the call cancellation to a destination side if the subscriber is an origination subscriber(S107). |
