Method and apparatus for extended call establishment and location support for IMS emergency calls

Abstract

Apparatus and methods of establishing an emergency voice call include user equipment transmitting, and a first serving core network receiving, a request for an emergency call via a wireless access network. The apparatus and methods further include a determination by the first serving core network of an alternative serving core network. In some aspects, the determination may be made based on a user equipment location from a location retrieval function, which may obtain such information from other network components or from the user equipment. In other aspects, the determination may be based on lack of capability or lack of capacity. Further, the apparatus and methods also include establishment of the emergency call with a second serving core network different from the serving core network based on the determination.

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This patent application claims priority to U.S. Provisional Application No. 61 / 019,164, filed January 4, 2008, entitled "METHODS ANDAPPARATUS FOR EXTENDED CALL ESTABLISHMENT AND SUPPORTFOR IMS EMERGENCY CALLS," and filed January 4, 2008 Priority to U.S. Provisional Application No. 61 / 019,158, filed "METHOD AND APPARATUS FOREXTENDED LOCATION SUPPORT FOR IMS EMERGENCY CALLS," both of which have been assigned to the assignee of the present application, are hereby incorporated by reference It is expressly incorporated herein. technical field [0003] The present invention relates generally to communications, and more specifically, the present invention relates to techniques for initiating calls in a communications network. Background technique [0004] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and so on. These wi...

AI Technical Summary

Problems solved by technology

However, this is by no means a reliable solution

[0010] In addition, the current IMS emergency call solution in 3GPP Technical Specification (TS) 23.167 clearly references and allows the use of 3GPP control plane location solutions and Open Mobile Alliance (OMA) Secure User Plane Location (SUPL), but does not explicitly Support for other possible location solutions

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