New session or handoff methods in wireless networks

• US 20020068565A1
• Filed: 12/05/2000
• Published: 06/06/2002
• Est. Priority Date: 12/05/2000
• Status: Active Grant

• Current Assignee: Nokia Networks (Nokia Corporation)
• Original Assignee: Nokia Networks (Nokia Corporation)
• Inventors: Purnadi, Rene, Saifullah, Yousuf
• Granted Patent: US 6,708,031 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04W 36/0033 with transfer of context information

Abstract

A new session or handoff procedure is triggered for a mobile station in a communications network having a packet switched network connected to a wireless network. A data identifier from the wireless network is determined which indicates the location of the mobile station in the wireless network. A list maintained in a gateway connected between the wireless network and the packet switch network associates data identifiers of the packet switched network with data identifiers of the wireless network. The data identifier of the packet switched network indicating the location of the mobile station in the wireless network is determined using the list maintained in the gateway.

Claims

1. A method of triggering a new session or handoff procedure for a user equipment in a communications system having a second network connected to a first network, the method comprising the steps of:

determining a first identifier from the first network indicating the location of the user equipment in the first network;

providing said first identifier to an entity connected to said first network and to said second network, said entity associating a second identifier of the second network with said first identifier of said first network, the first identifier indicating the location of the user equipment in the first network and said second identifier indicating the location of the user equipment in the second network; and

determining the second identifier of the second network indicating the location of the user equipment using said entity for associating said first identifier and said second identifier.

2. The method as recited in claim 1, wherein a controller obtains the first identifier of said first network, indicating the location of said user equipment in said first network, from the user equipment.

3. The method of claim 2, wherein the first identifier is a previous first identifier.

4. The method of claim 2, wherein the controller is a base station controller.

5. The method recited in claim 2, wherein the user equipment updates its stored first identifier with the first identifier sent by the network from the controller to the entity.

6. The method recited in claim 5, wherein said entity finds a correspondence between a previous first identifier from the first network and a second identifier from the second network.

7. The method recited in claim 5, wherein a plurality of first identifiers from said first network correspond to a single second identifier from said second network.

8. The method recited in claim 6, wherein said entity returns a registration reply to the controller after it has found a correspondence between said previous first identifier from the first network and a second identifier from the second network.

9. The method of claim 1, wherein the first identifier is a PZ_ID parameter and the second identifier is a RA_ID parameter.

10. The method of claim 1, wherein the first identifiers are PZ_ID and Cell-ID parameters and the second identifier is a RA_ID parameter.

11. The method recited in claim 8, wherein a PPP connection is established between the user equipment and the said entity.

12. The method recited in claim 6, wherein said entity sends an RA update request to a network element in the second network.

13. The method recited in claim 1, wherein said entity is a wireless gateway (WGW).

14. The method recited in claim 12, wherein said RA update request is sent over a standardized interface of said packet switched network.

15. The method recited in claim 14, wherein said second network is a GPRS network and said network element is a Serving GPRS Support Node (SGSN).

16. The method recited in claim 14, wherein said second network updates its second identifier indicating the location of the mobile station.

17. The method recited in claim 16, wherein said packet switched network sends a message to the gateway indicating that it has updated its identifier indicating the location of the mobile station.

18. The method of claim 1, wherein the first network is an access network and the second network is a core network.

19. The method of claim 18, wherein the access network is a cdma2000 network and the core network is a GPRS network.

20. The method of claim 1, wherein said user equipment is a mobile station.

21. The method of claim 1, wherein a DRS option in a registration request indicates when an attach procedure or handoff procedure is carried out.

22. A communications system, comprising at least:

an access network;

a core network; and

a gateway connected between the access network and the core network, said communications system implementing a method according to claim 1 which triggers the updating of an identifier in the core network indicating the location of a user equipment in the access network.

23. A communications network according to claim 22, wherein said gateway is a wireless gateway.

24. A communications network according to claim 23, wherein said wireless gateway connects to said wireless access network through an interface of said wireless access network.

25. A communications network according to claim 24, wherein said interface is a standardized A10/A11 interface.

26. A communications network according to claim 23, wherein said wireless gateway connects to said packet switched network through a standardized interface of said packet switched network.

27. A communications network according to claim 23, where the data identifier in said packet switched network indicating the location of the mobile station is different than the data identifier in the wireless access network indicating the location of the mobile station.

28. A communications network according to claim 23, wherein the packet switched network is a GPRS network and the wireless access network is a cdma2000 network.

29. A communications network according to claim 28, wherein the GPRS network includes a Serving GPRS Support Node (SGSN) which connects to the wireless gateway over a Iu-ps interface.

30. A communication network according to claim 22, wherein the mobile station in the wireless access network connects to an external network through said gateway and said packet switched network.

31. A communications network according to claim 30, wherein said mobile station receives a communication service with said external network.

32. A communications network according to claim 22, wherein said method implemented by said gateway is triggered by a new session of the mobile station.

33. A communications network according to claim 22, wherein said method implemented by said gateway is triggered by a handoff of said mobile station in said wireless access network.

34. A communications network according to claim 33, wherein said handoff is a hard handoff.

35. A communications network according to claim 33, wherein said handoff is a dormant handoff.