Method for accessing a service unavailable through a network cell
View Patent ↗A method performed by user equipment (UE) includes receiving a request to access a service unavailable through a first network cell associated with the UE, and receiving a message from an access device associated with the first network cell, wherein the message identifies a plurality of second network cells providing the service.
1. A method, comprising:
receiving, at an access device and from a user equipment (UE), a Radio Resource Control (RRC) connection setup complete message, wherein the RRC connection setup complete message includes a Non-Access Stratum (NAS) extended service request;
in response to the RRC connection setup complete message, forwarding the NAS extended service request to a Mobility Management Entity (MME); and
receiving, at the access device and from the MME, a S1 context setup message, wherein the S1 context setup message identifies a location area that the UE is registered in.
2. The method of claim 1 , further comprising:
selecting a circuit switched network cell belonging to the location area identified by the S1 context setup message; and
instructing the UE to transfer to the selected circuit switched network cell.
3. The method of claim 2 , wherein the selected circuit switched network cell is a Global System for Mobile Communications (GSM) Enhanced Data rates for GSM Evolution (EDGE) Radio Access Network (GERAN) cell.
4. The method of claim 1 , wherein the S1 context setup message includes an indication that circuit switched fallback has been triggered.
5. The method of claim 1 , further comprising:
sending a RRC connection reconfiguration message to the UE, wherein the RRC connection reconfiguration message configures the UE to measure at least one circuit switched network cell.
6. The method of claim 5 , further comprising:
in response to the RRC connection reconfiguration message, receiving a measurement report indicating measurement information of at least one circuit switched network cell.
7. The method of claim 1 , wherein the access device is a Long Term Evolution (LTE) access device.
8. A device, comprising:
a memory; and
at least one hardware processor communicatively coupled with the memory and configured to:
receive, from a user equipment (UE), a Radio Resource Control (RRC) connection setup complete message, wherein the RRC connection setup complete message includes a Non-Access Stratum (NAS) extended service request;
in response to the RRC connection setup complete message, forward the NAS extended service request to a Mobility Management Entity (MME); and
receive, from the MME, a S1 context setup message, wherein the S1 context setup message identifies a location area that the UE is registered in.
9. The device of claim 8 , wherein the at least one hardware processor is further configured to:
select a circuit switched network cell belonging to the location area identified by the S1 context setup message; and
instruct the UE to transfer to the selected circuit switched network cell.
10. The device of claim 9 , wherein the selected circuit switched network cell is a Global System for Mobile Communications (GSM) Enhanced Data rates for GSM Evolution (EDGE) Radio Access Network (GERAN) cell.
11. The device of claim 8 , wherein the S1 context setup message includes an indication that circuit switched fallback has been triggered.
12. The device of claim 8 , wherein the at least one hardware processor is further configured to:
send a RRC connection reconfiguration message to the UE, wherein the RRC connection reconfiguration message configures the UE to measure at least one circuit switched network cell.
13. The device of claim 12 , wherein the at least one hardware processor is further configured to:
in response to the RRC connection reconfiguration message, receive a measurement report indicating measurement information of at least one circuit switched network cell.
14. The device of claim 8 , wherein the device comprises a Long Term Evolution (LTE) access device.
15. A method, comprising:
receiving, at an Mobility Management Entity (MME) and from an access device, a Non-Access Stratum (NAS) extended service request for a user equipment (UE); and
sending, from the MME and to the access device, a S1 context setup message, wherein the S1 context setup message identifies a location area that the UE is registered in.
16. The method of claim 15 , wherein the S1 context setup message includes an indication that circuit switched fallback has been triggered.
17. The method of claim 15 , wherein the access device is a Long Term Evolution (LTE) access device.
18. A device, comprising:
a memory; and
at least one hardware processor communicatively coupled with the memory and configured to;
receive, from an access device, a Non-Access Stratum (NAS) extended service request for a user equipment (UE); and
send, to the access device, a S1 context setup message, wherein the S1 context setup message identifies a location area that the UE is registered in.
19. The device of claim 18 , wherein the S1 context setup message includes an indication that circuit switched fallback has been triggered.
20. The device of claim 18 , wherein the device comprises a Mobility Management Entity (MME).
21. The device of claim 18 , wherein the access device is a Long Term Evolution (LTE) access device.