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Method for SRVCC emergency call support

  • US 8,855,023 B2
  • Filed: 11/16/2009
  • Issued: 10/07/2014
  • Est. Priority Date: 11/17/2008
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • receiving, at a home subscriber server, a first message comprising a generated value representing a session transfer number from an internet protocol multimedia subsystem, the session transfer number relating to a transfer of an emergency session from a first network to a second network and pointing to the internet protocol multimedia subsystem where the transfer of the emergency session occurs;

    updating, by the home subscriber server, a user profile with the generated value representing the session transfer number for the emergency session, the user profile stored in the home subscriber server; and

    sending, by the home subscriber server, a second message comprising the generated value representing the session transfer number.

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