INTERWORKING FUNCTION FOR COMMUNICATION NETWORKS

• US 20100285797A1
• Filed: 04/14/2010
• Published: 11/11/2010
• Est. Priority Date: 04/14/2009
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: GHAI, Rajat, Chowdhury, Kuntal
• Granted Patent: US 8,706,113 B2
• Time in Patent Office: Days
• US Class Current: 455/426.1
• CPC Class Codes: H04W 36/385 of the core network

Abstract

Systems and methods for providing voice communications and data communications are provided, including: receiving an attach message from a mobile node indicating the mobile node can fallback from a first radio access technology to a second radio access technology and including location information identifying a location of the mobile node, the attach message received via the first radio access technology; sending a translated location updated message to a remote switching device; receiving a service request message from the mobile node, the service request message requesting initiation of a voice call, the service request message received via the first radio access technology; and based on the service request message and the indication that the mobile node can fallback to the second radio access technology, setting up the voice call with the mobile node via the second radio access technology.

Claims

1. A method comprising:

receiving an attach message from a mobile node indicating the mobile node can fallback from a first radio access technology to a second radio access technology and including location information identifying a location of the mobile node, the attach message received via the first radio access technology;

based on the attach message, generating a location update message including the location information, the location update message conformant with first interface procedures;

translating the location update message to be conformant with second interface procedures to form a translated location update message;

sending the translated location updated message to a remote switching device;

receiving a paging request from the remote switching device, the paging request conformant with the second interface procedures and regarding an incoming voice call directed to the mobile node;

translating the paging request to be conformant with the first interface procedures to form a translated paging request;

based on the translated paging request and the location information, paging the mobile node regarding the incoming voice call;

receiving a page response from the mobile node; and

based on the page response and the indication that the mobile node can fallback to the second radio access technology, setting up the voice call with the mobile node via the second radio access technology.

2. The method of claim 1, wherein the first radio access technology includes 4G radio and the second radio access technology comprises one of 3G radio and 2G radio.

3. The method of claim 1, wherein the first interface procedures include SGs and the second interface procedures include Gs.

4. The method of claim 1, wherein the remote switching device includes a mobile switching center.

5. The method of claim 1, further comprising instructing at least one radio access network to initiate a switch of the mobile node from an evolved nodeB to a nodeB.

6. The method of claim 1, further comprising receiving a service request message from the mobile node, the service request message requesting initiation of a data communication from the mobile node, the service request message received via the first radio access technology;

and setting up the data communication via the first radio access technology.

7. A method comprising, the method comprising:

receiving an attach message from a mobile node indicating the mobile node can fallback from a first radio access technology to a second radio access technology and including location information identifying a location of the mobile node, the attach message received via the first radio access technology;

based on the attach message, generating a location update message including the location information, the location update message conformant with first interface procedures;

translating the location update message to be conformant with second interface procedures to form a translated location update message;

sending the translated location updated message to a remote switching device;

receiving a service request message from the mobile node, the service request message requesting initiation of a voice call, the service request message received via the first radio access technology; and

based on the service request message and the indication that the mobile node can fallback to the second radio access technology, setting up the voice call with the mobile node via the second radio access technology.

8. The method of claim 7, wherein the first radio access technology includes 4G radio and the second radio access technology comprises one of 3G radio and 2G radio.

9. The method of claim 7, wherein the first interface procedures include SGs and the second interface procedures comprise Gs.

10. The method of claim 7, wherein the remote switching device includes a mobile switching center.

11. The method of claim 7, further comprising instructing at least one radio access network to initiate a switch of the mobile node from an evolved nodeB to a nodeB.

12. The method of claim 7, further comprising receiving a service request message from the mobile node, the service request message requesting initiation of a data communication from the mobile node, the service request message received via the first radio access technology;

and setting up the data communication via the first radio access technology.

13. A control node in a network, the control node configured to:

receive an attach message from a mobile node indicating the mobile node can fallback from a first radio access technology to a second radio access technology and including location information identifying a location of the mobile node, the attach message received via the first radio access technology;

based on the attach message, generating a location update message including the location information, the location update message conformant with first interface procedures;

translate the location update message to be conformant with second interface procedures to form a translated location update message;

send the translated location updated message to a remote switching device;

receive a paging request from the remote switching device, the paging request conformant with the second interface procedures and regarding an incoming first voice call directed to the mobile node;

translate the paging request to be conformant with the first interface procedures to form a translated paging request;

based on the translated paging request and the location information, paging the mobile node regarding the incoming first voice call;

receive a page response from the mobile node;

based on the page response and the indication that the mobile node can fallback to the second radio access technology, set up the first voice call with the mobile node via the second radio access technology;

receive a service request message from the mobile node, the service request message requesting initiation of a second voice call, the service request message received via the first radio access technology; and

based on the service request message and the indication that the mobile node can fallback to the second radio access technology, setting up the second voice call with the mobile node via the second radio access technology.

14. The control node of claim 13, wherein the first radio access technology includes 4G radio and the second radio access technology comprises one of 3G radio and 2G radio.

15. The control node of claim 13, wherein the first interface procedures include SGs and the second interface procedures comprise Gs.

16. The control node of claim 13, wherein the remote switching device includes a mobile switching center.

17. The control node of claim 13, further comprising instructing at least one radio access network to initiate a switch of the mobile node from an evolved nodeB to a nodeB.

18. The control node of claim 13, further configured to receive a service request message from the mobile node, the service request message requesting initiation of a data communication from the mobile node, the service request message received via the first radio access technology;

and set up the data communication via the first radio access technology.

19. The control node of claim 18, further configured to route at least a portion of the data communication to a serving general packet radio service support node.

20. The control node of claim 13, wherein the control node comprises a mobility management entity.