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Method, system and device for called party recovery in mobile switch center pool

  • US 8,160,582 B2
  • Filed: 03/10/2009
  • Issued: 04/17/2012
  • Est. Priority Date: 12/01/2006
  • Status: Active Grant
First Claim
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1. 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.

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