System and method of hybrid FDM/TDM coexistence interference avoidance

• US 20120069766A1
• Filed: 10/19/2011
• Published: 03/22/2012
• Est. Priority Date: 06/18/2010
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Fu, I-Kang, Liu, Chieh-Chao
• Granted Patent: US 8,838,046 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 2215/068 by avoiding a reception frequency range
• CPC Class Codes: H04W 36/20 for optimising the interference level
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• 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 hybrid FDM/TDM solution for in-device coexistence interference avoidance is proposed. A user equipment (UE) comprises a first radio transceiver and a second co-located radio transceiver. The UE detects coexistence interference between the two radios based on radio signal measurement. The UE sends an IDC interference indicator to its serving base station (eNB). The UE also reports IDC information including recommendation for FDM and TDM configurations to the eNB. The eNB receives the IDC interference indicator and evaluates whether to trigger FDM-based solution to mitigate the coexistence interference. The eNB also evaluates whether to trigger TDM-based solution to mitigate coexistence interference. The evaluation is based on the recommended FDM and TDM configurations. The eNB may trigger FDM-based solution, TDM-based solution, or FDM and TDM solution based on the evaluation results of the feasibility and effectiveness of each solution.

Claims

1. A method, comprising:

detecting an in-device coexistence (IDC) interference problem between a first radio transceiver and a second radio transceiver co-located in a device platform;

transmitting an IDC interference indicator from the first radio transceiver to a base station in a wireless system; and

reporting IDC information to the base station, wherein the IDC information comprises both recommendation for FDM and TDM configurations.

2. The method of claim 1, further comprising:

determining the recommendation for FDM configuration by measuring a reference signal quality and determining the recommendation for TDM configuration based on traffic and scheduling information of the second radio transceiver.

3. The method of claim 2, wherein the recommendation for FDM configuration is determined based on a reference signal received quality (RSRQ) of a serving cell.

4. The method of claim 2, wherein the recommendation for FDM configuration is determined based on a reference signal received quality (RSRQ) of a neighboring cell on a different frequency from a serving frequency.

5. The method of claim 2, wherein the IDC interference problem is detected based on measurement result.

6. A method, comprising:

receiving an in-device coexistence (IDC) interference indicator from a user equipment in a wireless system;

receiving IDC information from the UE, wherein the IDC information comprises both recommendation for FDM and TDM configurations;

determining whether to trigger a frequency division multiplexing (FDM) solution to mitigate IDC interference based on the IDC information; and

determining whether to trigger a time division multiplexing (TDM) solution to mitigate IDC interference based on the IDC information.

7. The method of claim 6, wherein the FDM solution involves handing over the UE from a serving cell to a target cell located on a different frequency based on the recommendation for FDM configurations.

8. The method of claim 7, wherein the recommendation for FDM configuration is determined base on a reference signal received quality (RSRQ) of the serving cell.

9. The method of claim 7, wherein the recommendation for FDM configuration is determined base on a reference signal received quality (RSRQ) of the target cell on the different frequency.

10. The method of claim 6, wherein the TDM solution involves scheduling the UE to transmit and receive radio signals over specific time duration based on the traffic and scheduling information.

11. The method of claim 6, wherein the base station triggers the FDM solution if the base station determines that the FDM solution is feasible and effective.

12. The method of claim 6, wherein the base station further determines whether to trigger the TDM solution after triggering the FDM solution.

13. The method of claim 6, wherein the base station triggers both the FDM solution and the TDM solution.

14. A base station, comprising:

a receiver that receives an in-device coexistence (IDC) interference indicator from a user equipment in a wireless system, wherein the receiver also receives IDC information from the UE, wherein the IDC information comprises both recommendation for FDM and TDM configurations; and

an IDC control module that determines whether to trigger a frequency division multiplexing (FDM) solution to mitigate IDC interference based on the IDC information, wherein the IDC control module also determines whether to trigger a time division multiplexing (TDM) solution to mitigate IDC interference based on the IDC information.

15. The base station of claim 14, wherein the FDM solution involves handing over the UE from a serving cell to a target cell located on a different frequency based on the recommendation for FDM configurations.

16. The base station of claim 15, wherein the recommendation for FDM configurations is determined base on a reference signal received quality (RSRQ) of the serving cell.

17. The base station of claim 15, wherein the recommendation for FDM configurations is determined base on a reference signal received quality (RSRQ) of the target cell on the different frequency.

18. The base station of claim 14, wherein the TDM solution involves scheduling the UE to transmit and receive radio signals over specific time duration based on the traffic and scheduling information.

19. The base. station of claim 14, wherein the base station triggers the FDM solution if the base station determines that the FDM solution is feasible and effective.

20. The base station of claim 14, wherein the base station further determines whether to trigger the TDM solution after triggering the FDM solution.

21. The base station of claim 14, wherein the base station triggers both the FDM solution and the TDM solution.