METHOD AND APPARATUS FOR PROVIDING NON-PACKET SWITCHED SERVICE IN A TARGET RADIO ACCESS TECHNOLOGY NETWORK

• US 20140016562A1
• Filed: 09/16/2013
• Published: 01/16/2014
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Watfa, Mahmoud, Aghili, Behrouz, Wang, Peter S., Olvera-Hernandez, Ulises, Somasundaram, Shankar
• Granted Patent: US 10,009,939 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 68/12 Inter-network notification
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method and apparatus are described for providing non-packet switched service to a target radio access technology (RAT) network. A circuit switched (CS) service notification message is received by a wireless transmit/receive unit (WTRU). If the WTRU has been allocated a valid temporary mobile subscriber identity (TMSI), a paging response message including the valid TMSI is transmitted after an inter-system change is performed from a source RAT network to a target RAT network. The CS service notification message is for terminating a CS call request. The source RAT network may be a long term evolution (LTE) network, and the target RAT network may be a third generation partnership project (3GPP) network. Alternatively, if the WTRU has not been allocated a valid TMSI, a paging response message including an international mobile subscriber identity (IMSI) that identifies the WTRU is transmitted after the inter-system change.

Claims

1. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:

receiving a circuit switched (CS) service notification message including a one bit information element (IE) having values that indicate one of an international mobile subscriber identity (IMSI) or a temporary mobile subscriber identity (TMSI) should be used after an inter-system change is performed; and

transmitting a paging response message using an identity in accordance with the IE after the inter-system change is performed.

2. The method of claim 1, wherein the WTRU has been allocated a valid TMSI, and the IE indicates the TMSI.

3. The method of claim 1, wherein the WTRU has not been allocated a valid TMSI, and the IE indicates the IMSI.

4. The method of claim 1, wherein the CS service notification message is for terminating a CS call request.

5. The method of claim 1, wherein the one bit IE has a value for the IMSI and another value for the TMSI.

10. The WTRU of claim 1, wherein the one bit IE has a value for the IMSI and another value for the TMSI.

6. A wireless transmit/receive unit (WTRU) comprising:

a receiver configured to receive a circuit switched (CS) service notification message including a one bit information element (IE) having values that indicate one of an international mobile subscriber identity (IMSI) or a temporary mobile subscriber identity (TMSI) should be used after an inter-system change is performed; and

a transmitter configured to transmit a paging response message using an identity in accordance with the IE after the inter-system change is performed.

7. The WTRU of claim 6, wherein the WTRU has been allocated a valid TMSI, and the IE indicates the TMSI.

8. The WTRU of claim 6, wherein the WTRU has not been allocated a valid TMSI, and the IE indicates the IMSI.

9. The WTRU of claim 6, wherein the CS service notification message is for terminating a CS call request.

11. A method implemented at a network, the method comprising:

transmitting a circuit switched (CS) service notification message including a one bit information element (IE) having values that indicate one of an international mobile subscriber identity (IMSI) or a temporary mobile subscriber identity (TMSI) should be used after an inter-system change is performed; and

receiving a paging response message using an identity in accordance with the IE after the inter-system change is performed.

12. The method of claim 11, wherein the WTRU has been allocated a valid TMSI, and the IE indicates the TMSI.

13. The method of claim 11, wherein the WTRU has not been allocated a valid TMSI, and the IE indicates the IMSI.

14. The method of claim 11, wherein the CS service notification message is for terminating a CS call request.

15. The method of claim 11, wherein the one bit IE has a value for the IMSI and another value for the TMSI.

16. A network comprising:

a transmitter configured to transmit a circuit switched (CS) service notification message including a one bit information element (IE) having values that indicate one of an international mobile subscriber identity (IMSI) or a temporary mobile subscriber identity (TMSI) should be used after an inter-system change is performed; and

a receiver configured to receive a paging response message using an identity in accordance with the IE after the inter-system change is performed.

17. The network of claim 16, wherein the WTRU has been allocated a valid TMSI, and the IE indicates the TMSI.

18. The network of claim 16, wherein the WTRU has not been allocated a valid TMSI, and the IE indicates the IMSI.

19. The network of claim 16, wherein the CS service notification message is for terminating a CS call request.

20. The network of claim 16, wherein the one bit IE has value for the IMSI and another value for the TMSI.