Method of TDM In-Device Coexistence Interference Avoidance

• US 20120082140A1
• Filed: 09/29/2011
• Published: 04/05/2012
• Est. Priority Date: 10/01/2010
• Status: Active Grant

• Current Assignee: HFI Innovation, Inc. (MediaTek, Inc.)
• Original Assignee: MediaTek Singapore Pte. Ltd. (MediaTek, Inc.)
• Inventors: Lin, Kuhn-Chang, Fu, I-Kang, Su, York Ted
• Granted Patent: US 8,780,880 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 74/085 collision avoidance
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• 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 of TDM in-device coexistence (IDC) interference avoidance is proposed. In a wireless communication device, a first radio module is co-located with a second radio module in the same device platform. The first radio module obtains traffic and scheduling information of the second radio module. The first radio module then determines a desired TDM pattern based on the traffic and scheduling information to prevent IDC interference with the second radio module. The first radio module also transmits TDM coexistence pattern information based on the desired TDM pattern to a base station. In one embodiment, the TDM coexistence pattern information comprises a recommended TDM pattern periodicity and a scheduling period to maximize IDC efficiency subject to limited level of IDC interference possibility. In one specific example, the TDM coexistence pattern information comprises a set of discontinuous reception (DRX) configuration parameters defined in long-term evolution (LTE) 3GPP standards.

Claims

1. A method comprising:

obtaining, by a first radio module, traffic or scheduling information of a second radio module co-located with the first radio module in a wireless communication device;

determining a desired time-division multiplexing (TDM) pattern for the first radio module based on the traffic or scheduling information to mitigate in-device coexistence (IDC) interference with the second radio module; and

transmitting coexistence pattern information based on the desired TDM pattern to a base station.

3. The method of claim 1, wherein the coexistence pattern information comprises a set of discontinuous reception (DRX) configuration parameters defined in long-term evolution (LTE) 3GPP standards.

5. The method of claim 3, wherein an on DurationTimer is small enough such that collision probability between the first and the second radio modules is lower than a threshold value.

6. The method of claim 3, further comprising:

transmitting an IDC interference indicator to the base station such that flexible extension for an ON duration in each DRX cycle is restricted to reduce collision probability between the first and the second radio modules.

7. The method of claim 1, further comprising:

triggering an IDC interference mitigation mechanism based on an IDC interference measurement result, wherein the coexistence pattern information is transmitted to the base station when the IDC interference mitigation mechanism is triggered.

2. The method of 1, wherein the coexistence pattern information comprises a recommended TDM pattern periodicity and a scheduling period.

4. The method of 3, wherein a longDRX-Cycle is 128 ms or 64 ms, and wherein the second radio module is a WiFi radio module having WiFi beacon signal periodicity of 102.4 ms or multiple of 102.4 ms.

8. A wireless communication device, comprising:

a first radio module that obtains traffic or scheduling information of a second radio module co-located with the first radio module;

a control entity that determines a desired time-division multiplexing (TDM) pattern for the first radio module based on the traffic or scheduling information to mitigate in-device coexistence (IDC) interference with the second radio module; and

a transmitter that transmits coexistence pattern information based on the desired TDM pattern to a base station.

9. The device of claim 8, wherein the coexistence pattern information comprises a recommended TDM pattern periodicity and a scheduling period.

10. The device of claim 8, wherein the coexistence pattern information comprises a set of discontinuous reception (DRX) configuration parameters defined in long-term evolution (LTE) 3GPP standards.

11. The device of claim 10, wherein a longDRX-Cycle is 128 ms or 64 ms, and wherein the second radio module is a WiFi radio module having WiFi beacon signal periodicity of 102.4 ms or multiple of 102.4 ms.

12. The device of claim 10, wherein an on DurationTimer is small enough such that collision probability between the first and the second radio modules is lower than a threshold value.

13. The device of claim 10, wherein the device transmits an IDC interference indicator to the base station such that flexible extension for an ON duration in each DRX cycle is restricted to reduce collision probability between the first and the second radio modules.

14. The device of claim 8, wherein the device triggers an IDC interference mitigation mechanism based on an IDC interference measurement result, wherein the coexistence pattern information is transmitted to the base station when the IDC interference mitigation mechanism is triggered.

15. A method comprising:

receiving time-division multiplexing (TDM) coexistence pattern information from a first LTE radio module in an long-term evolution (LTE) 3GPP wireless system, wherein the first LTE radio module and a second radio module are co-located in a same device platform; and

determining a set of discontinuous reception (DRX) configuration parameters for the first radio module based on the TDM coexistence pattern information to mitigate in-device coexistence (IDC) interference between the first LTE radio module and the second radio module.

17. The method of claim 15, wherein the coexistence pattern information comprises the set of discontinuous reception (DRX) configuration parameters.

19. The method of claim 17, wherein an on DurationTimer is configured to be small enough such that collision probability between the first and the second radio modules is lower than a threshold value.

20. The method of claim 17, further comprising:

receiving an IDC interference indication; and

restricting flexible extension of an ON duration within each DRX cycle to reduce collision probability between the first and the second radio modules.

16. The method of 15, wherein the coexistence pattern information comprises a recommended TDM pattern periodicity and a scheduling period.

18. The method of 17, wherein a longDRX-Cycle is configured to be 128 ms or 64 ms, and wherein the second radio module is a WiFi radio module having WiFi beacon signal periodicity of 102.4 ms or multiple of 102.4 ms.