Patent ID: 8160582

Claim:
A method for called party recovery in a Mobile Switch Center (MSC) Pool, applied in a system that comprises a Home Location Register (HLR) and an MSC Pool including multiple Mobile Switch Centers/Visitor Location Registers (MSC/VLRs), comprising: configuring a backup server for each MSC/VLR in the MSC Pool; the method further comprising: if an MSC/VLR serving a user is down, the user does not initiate a calling service or a location update, and the user is called, sending, by the HLR, a call signaling to the backup server of the MSC/VLR that is down; initiating, by the backup server of the MSC/VLR, a paging request to the user and initiating a location update for the user to the HLR; registering, by the HLR, user data of the user at the backup server of the MSC/VLR and switching the MSC/VLR serving the user to the backup server of the MSC/VLR; wherein initiating the location update for the user to the HLR; the HLR registering user data of the user at the backup server of the MSC/VLR and switching the MSC/VLR serving the user to the backup server of the MSC/VLR comprise: sending, by the backup server of the MSC/VLR, a location update request to the HLR after receiving a paging response from the user; sending, by the HLR, a message to the backup server to cancel user location; removing, by the backup server, the user data of the user backed up at the local server from the MSC/VLR that is down and returning a cancel user location confirmation to the HLR; inserting, by the HLR, the user data of the user into the backup server and registering the backup server as an serving MSC/VLR of the user.