Patent
Methods and Apparatus for Enabling Access Transfer of an Emergency Call Back Session
Fredrik Lindholm,Ivo Sedlacek +1 more
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TLDR
In this article, the authors present a method of enabling Single Radio Voice Call Continuity (SRVCC) access transfer for an emergency call back IP Multimedia Subsystem, IMS, session to a user equipment, UE.Abstract:
According to an embodiment of the present invention there is provided a method of enabling Single Radio Voice Call Continuity, SRVCC, access transfer for an emergency call back IP Multimedia Subsystem, IMS, session to a user equipment, UE. The method comprises including a session continuity function in a signalling path of a request for establishment of a call back session intended for the UE, and if access transfer of the call back session from a packet switched access to a circuit switched access is required, implementing SRVCC access transfer of the call back session using the session continuity function.read more
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Patent
Voice call continuity for emergency calls
Eric Turcotte,Stephen Terrill +1 more
TL;DR: In this article, an enhanced VCC application server and a method are described that assists in establishing an emergency call between a VCC capable UE (which is located within an IMS network) and a Public Safety Access Point (PSAP).
Patent
Single radio voice call continuity for emergency callback or click-to-dial sessions
TL;DR: In this paper, the authors present an example of an apparatus that receives a message inviting a user equipment (UE) to participate in an emergency communication session with an originating node, where the user equipment is registered with an Internet Protocol Multimedia Subsystem (IMS).