Multi-radio interference mitigation via frequency selectivity

• US 9,820,158 B2
• Filed: 02/07/2013
• Issued: 11/14/2017
• Est. Priority Date: 03/07/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chrisikos, George, Wietfeldt, Richard Dominic
• Primary Examiner(s): Javaid, Jamal
• Application Number:
  US13/762,125
• Publication Number:
  US 20140050146A1
• Time in Patent Office: 1,741 Days
• Field of Search: 370328, 370329, 370252, 455 631
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user
• 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 user equipment (UE) may mitigate interference on the user equipment with two or more radios. In some instances, the UE may determine when communications of the two or more radios experience interference, in which two radios of the two or more radios operate with the same radio access technology. Further, the UE may alter an operating frequency of a first radio of the two radios to mitigate the interference.

Claims

1. A method of wireless communication, comprising:

operating, at a user equipment (UE), at least two radios of a plurality of radios within the UE with a same radio access technology and on a same frequency band;

setting a first portion of the frequency band for operating a first radio of the at least two radios of the UE;

filtering communications of the first radio and a second radio of the at least two radios, at the UE, to respectively operate in the first portion of the frequency band and a second portion of the frequency band to avoid in-device interference between the at least two radios within the UE caused by the at least two radios operating at a same time; and

assigning the second radio to another frequency band and bypassing the filtering communications of the first radio and the second radio when the other frequency band is available.

2. The method of claim 1, in which the filtering comprises filtering communications of the first radio with a high band filter when the first portion comprises a high band portion of the frequency band and filtering communications of the second radio with a low band filter when the second radio is set to operate on the second portion of the frequency band, the second portion comprising a low band portion of the frequency band.

3. The method of claim 1, in which the filtering comprises filtering communications of the first radio with a low band filter when the first portion comprises a low band portion of the frequency band and filtering communications of the second radio with a high band filter when the second radio is set to operate on the second portion of the frequency band, the second portion comprising a high band portion of the frequency band.

4. The method of claim 1, in which the second radio is configured to operate in an access point mode, and the first radio is configured to operate in a station mode.

5. The method of claim 1, in which the at least two radios are configured to operate with two or more channelization filters.

17. The method of claim 1, in which the same radio access technology comprises a wireless local area network (WLAN) operating in a 2.4 GHz frequency band.

18. The method of claim 1, in which the first radio and the second radio are configured to operate in an access point mode.

19. The method of claim 1, in which the setting comprises accounting for potential interference with different radio access technologies (RATs).

6. An apparatus configured for wireless communication, comprising:

at least two radios of a plurality of radios within a user equipment (UE), in which the at least two radios operate with a same radio access technology on a same frequency band;

a first processor for setting, at the UE, a first portion of the frequency band for operating a first radio of the at least two radios of the UE;

means for filtering, at the UE, communications of the first radio and a second radio of the at least two radios to respectively operate in the first portion of the frequency band and a second portion of the frequency band to avoid in-device interference between the at least two radios within the UE caused by the at least two radios operating at a same time; and

a second processor for assigning the second radio to another frequency band and bypassing the filtering communications of the first radio and the second radio when the other frequency band is available.

7. The apparatus of claim 6, in which the means for filtering comprises means for filtering communications of the first radio with a high band filter when the first portion comprises a high band portion of the frequency band and means for filtering communications of the second radio with a low band filter when the second radio is set to operate on the second portion of the frequency band, the second portion comprising a low band portion of the frequency band.

8. The apparatus of claim 6, in which the means for filtering comprises means for filtering communications of the first radio with a low band filter when the first portion comprises a low band portion of the frequency band and means for filtering communications of the second radio with a high band filter when the second radio is set to operate on the second portion of the frequency band, the second portion comprising a high band portion of the frequency band.

9. A non-transitory computer-readable medium having non-transitory program code recorded thereon, the non-transitory program code comprising:

program code to operate, at a user equipment (UE), at least two radios of a plurality of radios within the UE with a same radio access technology and on a same frequency band;

program code to set a first portion of the frequency band for operating a first radio of the at least two radios of the UE;

program code to filter communications of the first radio and a second radio of the at least two radios, at the UE, to respectively operate in the first portion of the frequency band and a second portion of the frequency band to avoid in-device interference between the at least two radios within the UE caused by the at least two radios operating at a same time; and

program code to assign the second radio to another frequency band and to bypass filtering communications of the first radio and the second radio when the other frequency band is available.

10. The computer-readable medium of claim 9, in which the program code to filter comprises program code to filter communications of the first radio with a high band filter when the first portion comprises a high band portion of the frequency band and program code to filter communications of the second radio with a low band filter when the second radio is set to operate on the second portion of the frequency band, the second portion comprising a low band portion of the frequency band.

11. The computer-readable medium of claim 9, in which the program code to filter comprises program code to filter communications of the first radio with a low band filter when the first portion comprises a low band portion of the frequency band and program code to filter communications of the second radio with a high band filter when the second radio is set to operate on the second portion of the frequency band, the second portion comprising a high band portion of the frequency band.

12. An apparatus configured for wireless communication, the apparatus comprising:

a memory; and

at least one processor coupled to the memory, the at least one processor being configured;

to operate, at a user equipment (UE), at least two radios of a plurality of radios within the UE with a same radio access technology and on a same frequency band;

to set a first portion of the frequency band for operating a first radio of the at least two radios of the UE;

to filter communications of the first radio and a second radio of the at least two radios, at the UE, to respectively operate in the first portion of the frequency band and a second portion of the frequency band to avoid in-device interference between the at least two radios within the UE caused by the at least two radios operating at a same time; and

to assign the second radio to another frequency band and to bypass filtering communications of the first radio and the second radio when the other frequency band is available.

13. The apparatus of claim 12, in which the at least one processor configured to filter comprises the at least one processor configured to filter communications of the first radio with a high band filter when the first portion comprises a high band portion of the frequency band and configured to filter communications of the second radio with a low band filter when the second radio is set to operate on the second portion of the frequency band, the second portion comprising a low band portion of the frequency band.

14. The apparatus of claim 12, in which the at least one processor configured to filter comprises the at least one processor configured to filter communications of the first radio with a low band filter when the first portion comprises a low band portion of the frequency band and configured to filter communications of the second radio with a high band filter when the second radio is set to operate on the second portion of the frequency band, the second portion comprising a high band portion of the frequency band.

15. The apparatus of claim 12, in which the second radio is configured to operate in an access point mode, and the first radio is configured to operate in a station mode.

16. The apparatus of claim 12, in which the at least two radios are configured to operate with two or more channelization filters.

20. The apparatus of claim 12, in which the same radio access technology comprises a wireless local area network (WLAN) operating in a 2.4 GHz frequency band.

21. The apparatus of claim 12, in which the first radio and the second radio are configured to operate in an access point mode.

22. The apparatus of claim 12, in which the at least on processor is configured to set the first portion while accounting for potential interference with different radio access technologies (RATs).