Patent ID: 8478226

Claim:
An apparatus comprising: a network component configured to receive from a user equipment (UE) a Session Initiation Protocol (SIP) request message for a SIP dialog, the SIP request message containing a Request Uniform Resource Identifier (URI); inspect the Request URI of the SIP request message for an identifier that matches an emergency service identifier in a configurable list stored by the network component; when the Request URI matches an emergency service identifier in the configurable list: send to the UE a SIP response message containing a P-Asserted-Identity header field with an indicator indicating that the SIP request message for a SIP dialog, sent by the UE, is an emergency-related request; and receive from the UE, in response to the SIP response message, a SIP request message within the same SIP dialog, the SIP request message within the same SIP dialog containing emergency-related information associated with the UE comprising the UE location.