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Method and apparatus for clearing hang calls

  • US 9,231,785 B2
  • Filed: 12/18/2009
  • Issued: 01/05/2016
  • Est. Priority Date: 12/18/2009
  • Status: Active Grant
First Claim
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1. A method for clearing a call in a communication network, the method comprising:

  • detecting, by a processor of a call stateful network element in a signaling path of the call, a failure of an adjacent call stateful network element in the signaling path of the call, wherein the adjacent call stateful network element comprises a next hop network element in the signaling path, wherein the communication network comprises a voice over internet protocol network, wherein the failure of the adjacent call stateful network element in the signaling path of the call is detected via a heartbeat message from the processor of the call stateful network element to the adjacent call stateful network element, wherein the heartbeat message is sent independent of a plurality of calls processed by the call stateful network element including the call;

    identifying, by the processor, a plurality of existing calls that is affected by the failure of the adjacent call stateful network element, wherein the plurality of existing calls includes the call;

    sending, by the processor, a call release notification message via another adjacent call stateful network element in a call release path of each of the plurality of existing calls to notify a call stateful media component of each of the plurality of existing calls of the failure of the adjacent call stateful network element;

    monitoring, by the processor, a media path of the call for activity; and

    clearing, by the processor, the call when the media path of the call is inactive, wherein the media path is a different route from the signaling path.

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