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Integrated services user part (ISUP)/ session initiation protocol (SIP) gateway for unlicensed mobile access (UMA) emergency services call flow

  • US 8,954,029 B2
  • Filed: 07/15/2013
  • Issued: 02/10/2015
  • Est. Priority Date: 07/18/2005
  • Status: Expired due to Fees
First Claim
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1. A SIP gateway, comprising:

  • a receiver to receive a location-based request message including a calling party ID, said location request message having been initiated via a non-SIP network element;

    a SIP encapsulation module to encapsulate said location-based request message within a SIP message;

    a transmitter to transmit said SIP message including said calling party ID to a positioning center;

    a SIP message receiver module to receive another SIP message including location-based information, back from said positioning center; and

    an initial message transmitter module to transmit an initial message including said location-based information back to said non-SIP network element.

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