RECEIVING GSM TIMING INFORMATION FROM TD-SCDMA BASE STATION TO FACILITATE TD-SCDMA TO GSM WIRELESS HANDOVER

• US 20130201963A1
• Filed: 04/26/2010
• Published: 08/08/2013
• Est. Priority Date: 01/19/2010
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chin, Tom, Shi, Guangming, Lee, Kuo-Chun
• Application Number:
  US13/516,656
• Publication Number:
  US 20130201963A1
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04W 36/0058 Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

Wireless communication is implemented by a multi-mode user equipment (UE). The method includes receiving cross reference timing information indicating a relationship between Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) timing and GSM timing. The method further includes acquiring a Global System for Mobile communications (GSM) signal from at least one GSM cell, based on the cross reference timing information. The UE can handover to a selected GSM cell based on the measurements of the acquired GSM cell(s).

Claims

1. A method of wireless communication implemented by a multi-mode user equipment (UE), comprising

receiving a message indicative of a timing relationship between a Global System for Mobile communications (GSM) frame and a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) frame.

2. The method of claim 1, further comprising acquiring a GSM signal from at least one GSM cell based on the message.

3. The method of claim 1, in which the timing relationship indicates a frame number in a Frequency Correction Channel (FCCH)/Synchronization Channel (SCH) cycle corresponding to a next TD-SDMA subframe frame number (SFN)=0.

4. The method of claim 2, further comprising handing over to a selected GSM cell based on the acquiring.

5. The method of claim 4, in which the acquiring measures strength, timing, and frequency of the GSM signal.

6. The method of claim 4, in which the acquiring obtains Base Station Identity Code information.

7. A method of wireless communication, implemented by a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) Node B, comprising:

obtaining a timing relationship between a Global System for Mobile communications (GSM) frame and a TD-SCDMA frame; and

transmitting a message indicative of the timing relationship between the GSM frame and the TD-SCDMA frame.

8. The method of claim 7, in which the timing relationship is obtained using a GSM mobile station.

9. The method of claim 8, in which the GSM mobile station is installed in the Node B.

10. A user equipment (UE) of a time division-synchronous code division multiple access (TD-SCDMA) system, the UE comprising:

at least one processor configured to receive a message indicative of a timing relationship between a Global System for Mobile communications (GSM) frame and a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) frame; and

a memory coupled to the at least one processor.

11. The UE of claim 10, in which the at least one processor is further configured to acquire a GSM signal from at least one GSM cell based on the message.

12. The UE of claim 10, in which the timing relationship indicates a frame number in a Frequency Correction Channel (FCCH)/Synchronization Channel (SCH) cycle corresponding to a next TD-SDMA subframe frame number (SFN)=0.

13. The UE of claim 11, in which the at least one processor is further configured to hand over to a selected GSM cell based on the acquiring.

14. The UE of claim 13, in which the acquiring measures strength, timing, and frequency of the GSM signal.

15. The UE of claim 13, in which the acquiring obtains Base Station Identity Code information.

16. A Node B of a time division-synchronous code division multiple access (TD-SCDMA) system, the Node B comprising:

at least one processor configured to;

obtain a timing relationship between a Global System for Mobile communications (GSM) frame and a TD-SCDMA frame; and

transmit a message indicative of the timing relationship between the GSM frame and the TD-SCDMA frame; and

a memory coupled to the at least one processor.

17. The Node B of claim 16, further comprising a GSM mobile station that obtains the timing relationship.

18. A computer readable medium having program code recorded thereon, the program code comprising:

program code to receive a message indicative of a timing relationship between a Global System for Mobile communications (GSM) frame and a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) frame.

19. The computer readable medium of claim 18, further comprising program code to acquire a GSM signal from at least one GSM cell based on the message.

20. The computer readable medium of claim 18, in which the timing relationship indicates a frame number in a Frequency Correction Channel (FCCH)/Synchronization Channel (SCH) cycle corresponding to a next TD-SDMA subframe frame number (SFN)=0.

21. The computer readable medium of claim 19, further comprising program code to hand over to a selected GSM cell based on the acquiring.

22. The computer readable medium of claim 21, in which the acquiring measures strength, timing, and frequency of the GSM signal.

23. The computer readable medium of claim 21, in which the acquiring obtains Base Station Identity Code information.

24. A computer readable medium having program code recorded thereon, the program code comprising:

program code to obtain a timing relationship between a Global System for Mobile communications (GSM) frame and a time division-synchronous code division multiple access (TD-SCDMA) frame; and

program code to transmit a message indicative of the timing relationship between the GSM frame and the TD-SCDMA frame.

25. An apparatus for wireless communication in a time division-synchronous code division multiple access (TD-SCDMA) system, the apparatus comprising:

means for receiving a message indicative of a timing relationship between a Global System for Mobile communications (GSM) frame and a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) frame; and

means for acquiring a GSM signal from at least one GSM cell based on the message.

26. The apparatus of claim 25, in which the timing relationship indicates a frame number in a Frequency Correction Channel (FCCH)/Synchronization Channel (SCH) cycle corresponding to a next TD-SDMA subframe frame number (SFN)=0.

27. The apparatus of claim 25, further comprising means for handing over to a selected GSM cell based on the acquiring.

28. The apparatus of claim 25, in which the acquiring means measures strength, timing, and frequency of the GSM signal.

29. The apparatus of claim 25, in which the acquiring means obtains Base Station Identity Code information.

30. An apparatus for wireless communication in a time division-synchronous code division multiple access (TD-SCDMA) system, the apparatus comprising:

means for obtaining a timing relationship between a Global System for Mobile communications (GSM) frame and a TD-SCDMA frame; and

means for transmitting a message indicative of the timing relationship between the GSM frame and the TD-SCDMA frame.

31. The apparatus of claim 30, in which the timing relationship obtaining means comprises a GSM mobile station.

32. The apparatus of claim 31, in which the GSM mobile station is installed in the Node B.