VOICE SERVICE IN EVOLVED PACKET SYSTEM
Methods and apparatus to manage voice service in evolved packet systems are disclosed. An example method in a user equipment (UE) with a first indicator related to voice services in an Evolved Packet System (EPS) comprises receiving a Non Access Stratum (NAS) protocol response message with a second indicator and responsive to at least one of the first indicator or the second indicator, sending a notification that voice services are not currently able to be provided.
1 . A method in a user equipment (UE) with a first indicator related to voice services in an Evolved Packet System (EPS), the method comprising:
receiving a Non Access Stratum (NAS) protocol response message with a second indicator; and
responsive to at least one of the first indicator or the second indicator, sending a notification that voice services are not currently able to be provided.
2 . The method of claim 1 , wherein the NAS protocol response message is a NAS registration response message.
3 . The method of claim 1 , wherein one or both of the first indicator or the second indicator are Voice Service Indicators (VSIs).
4 . The method of claim 3 , wherein the VSI is set to at least one of:
IMS Voice over PS session supported indication;
IMS Voice over PS session not supported indication;
Voice Centric;
Data Centric;
CS Voice Only;
IMS PS Voice Only;
CS Voice Preferred, IMS Voice Secondary; or
IMS Voice Preferred, CS Voice Secondary.
5 . The method of claim 3 , wherein the VSIs are one or more of:
Voice over IP Multimedia Subsystem (IMS VoPS) indicators;
UE usage settings; and
UE voice settings.
6 . The method of claim 1 , wherein the second indicator is at least one of a cause value or a failure indication.
7 . The method of claim 6 , wherein at least one of the cause value or the failure indication is set to:
Failure to register UE for circuit switched (CS) or packet switched (PS) services; or
CS domain not available.
8 . The method of claim 1 , wherein sending a notification is performed by the UE and said notification is sent to at least one of a user or an upper layer.
9 . The method of claim 1 , wherein NAS registration response message is at least one of:
Response to the EPS attach procedure;
Tracking Area Update response;
Routing Area Update response;
ATTACH accept message;
SERVICE REJECT message;
ROUTING AREA UPDATE ACCEPT message; or
TRACKING AREA UPDATE ACCEPT message.
10 . The method of claim 1 , wherein sending the notification is responsive to both the first indicator and the second indicator.
11 . A method in a user equipment (UE) with a first indicator related to voice services in an Evolved Packet System (EPS), the method comprising:
receiving a Non Access Stratum (NAS) protocol response message with a second indicator; and
responsive to at least one of the first indicator or the second indicator, sending a notification that voice services are not currently able to be provided, wherein the notification that the voice services are not currently able to be provided comprises a notification that CS domain is not available.
12 . The method of claim 11 , wherein the NAS protocol response message is a NAS registration response message.
13 . The method of claim 11 , wherein one or both of the first indicator or the second indicator are Voice Service Indicators (VSIs).
14 . The method of claim 13 , wherein the VSI is set to at least one of:
IMS Voice over PS session supported indication;
IMS Voice over PS session not supported indication;
Voice Centric;
Data Centric;
CS Voice Only;
IMS PS Voice Only;
CS Voice Preferred, IMS Voice Secondary; or
IMS Voice Preferred, CS Voice Secondary.
15 . The method of claim 13 , wherein the VSIs are one or more of:
Voice over IP Multimedia Subsystem (IMS VoPS) indicators;
UE usage settings; and
UE voice settings.
16 . The method of claim 11 , wherein the second indicator is at least one of a cause value or a failure indication.
17 - 20 . (canceled)
21 . A method in a user equipment (UE) with a first indicator related to voice services in an Evolved Packet System (EPS), the method comprising:
receiving a Non Access Stratum (NAS) protocol response message with a second indicator; and
responsive to at least one of the first indicator or the second indicator, sending a notification that voice services are not currently able to be provided.
22 . The method of claim 21 , wherein the NAS protocol response message is a NAS registration response message.
23 . The method of claim 21 , wherein one or both of the first indicator or the second indicator are Voice Service Indicators (VSIs).
24 - 30 . (canceled)