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Voice call continuity in hybrid networks

  • US 9,351,203 B2
  • Filed: 09/13/2013
  • Issued: 05/24/2016
  • Est. Priority Date: 09/13/2013
  • Status: Active Grant
First Claim
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1. A method for providing voice call continuity in a hybrid network comprising loosely coupled network portions, the network portions including at least a mobile operator network and a VoIP (Voice over Internet Protocol) network, the method comprising the steps of:

  • receiving a call from a mobile user equipment that accesses the hybrid network over a connection to one of the network portions;

    anchoring both a media path and a signal path for the call in the VoIP network irrespective of the call'"'"'s point of origin or point of termination in the hybrid network, the anchored call including an original call leg;

    generating a voice call continuity identifier for the call, the voice call continuity identifier being unique for each call on the mobile user equipment;

    upon initiation of a decision to perform a handover, implementing a new connection to one of the network portions;

    creating a new call leg over the new connection; and

    associating the voice call continuity identifier with each of the original call leg and new call leg so that the legs are connectable at a common port in the VoIP network.

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