Method and apparatus for reducing interference in a wireless system

• US 9,125,096 B2
• Filed: 05/04/2012
• Issued: 09/01/2015
• Est. Priority Date: 05/04/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Patil, Shailesh, Wang, Hua, Li, Junyi
• Primary Examiner(s): Nguyen, Simon
• Application Number:
  US13/464,820
• Publication Number:
  US 20130295976A1
• Time in Patent Office: 1,215 Days
• Field of Search: 455/63.1, 455/67.11, 455/67.13, 455/452.2, 455/509, 455/522, 455/450, 455/501, 370/252, 370/330
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

Techniques for performing interference reduction are described. In a design of an apparatus, system, method and computer program of the present disclosure, a mobile device may at least partially identify an interfering resource using at least energy received from the interfering resource, and the mobile device may report the interfering resource to a base station for mitigation of the interference. The identifying may include extracting, from the received energy, information distinguishing the interfering resource from other devices. The interfering resource may interfere in one of a communication time slot, and a communication frequency.

Claims

1. A method of reducing interference in a wireless system, comprising:

a mobile device at least partially identifying an interfering resource using at least energy received from the interfering resource, said identifying including identifying that the interfering resource is desensing a receiver of the mobile device and at least one of;

a period of the interference, time when the interference is present, or subframes in which the interference is present; and

the mobile device reporting the interfering resource to a wide area network (WAN) base station for mitigation of the interference, wherein reporting the interfering resource to the WAN base station for mitigation of the interference includes using uplink communications resources allocated by said WAN base station to a peer to peer (P2P) group for P2P communications to report the interfering resource to the WAN base station, said uplink resources allocated by said WAN base station for P2P communication being separate in time or frequency from communications resources allocated for use by WAN user equipment devices for communication with said WAN base station.

2. The method of claim 1, wherein the WAN base station is not a member of said P2P group.

3. The method of claim 1,

wherein during desensing the mobile device is unable to directly identify an interfering device using the interfering resource;

and

wherein the identifying comprises identifying at least a communication time slot of the interfering resource.

4. The method of claim 1, further comprising the mobile device determining that the interfering resource is periodically interfering.

5. The method of claim 1, wherein said reporting comprises reporting information regarding a period or frequency of the interfering resource to the WAN base station.

6. The method of claim 1, wherein said reporting comprises reporting a severity of the interference.

7. The method of claim 1, wherein said identifying comprises identifying, based on an uplink control channel of the interfering resource, the interfering resource.

8. The method of claim 7, wherein said identifying further comprises identifying a frequency of the uplink control channel as a leakage frequency of the interference.

9. The method of claim 1, further comprising:

changing to a different subset of subframes of an LTE radio frame in response to a signal from the WAN base station to avoid use of a subframe subset used by an interfering UE causing said desensing.

10. A method of reducing interference in a long term evolution (LTE) wireless system, comprising:

a first user equipment directly communicating, absent intervening devices and using LTE uplink resources, with a second user equipment;

the first user equipment experiencing interference from a third user equipment communicating with a wide area network (WAN) base station that degrades the direct communication between the first user equipment and the second user equipment;

the first user equipment identifying an interfering resource using at least energy received from the interfering resource, said identifying including identifying that the interfering resource is desensing a receiver of the first user equipment and at least one of;

a period of the interference, time when the interference is present, or subframes in which the interference is present; and

the first user equipment reporting the interfering resource of the third user equipment to the WAN base station for mitigation by the WAN base station of the interference wherein reporting the interfering resource to the WAN base station for mitigation of the interference includes using uplink communications resources allocated by said WAN base station to a peer to peer (P2P) group for P2P communications to report the interfering resource to the WAN base station, said uplink resources allocated by said WAN base station for P2P communication being separate in time or frequency from communications resources allocated for use by WAN user equipment devices for communication with said WAN base station.

11. A first user equipment capable of reducing interference in a wireless system, comprising:

means for directly communicating using uplink resources with a second user equipment;

means for;

identifying interference from a third user equipment communicating with a wide area network (WAN) base station that degrades the direct communication with the second user equipment, said means for identifying at least partially identifying an interfering resource using at least energy received from the interfering resource, said identifying including identifying that the interfering resource is desensing a receiver of the first user equipment and at least one of;

a period of the interference, time when the interference is present, or subframes in which the interference is present; and

reporting the interfering resource to the base station for mitigation by the WAN base station of the interference, wherein reporting the interfering resource to the WAN base station for mitigation of the interference includes using uplink communications resources allocated by said WAN base station to a peer to peer (P2P) group for P2P communications to report the interfering resource to the WAN base station, said uplink resources allocated by said WAN base station for P2P communication being separate in time or frequency from communications resources allocated for use by WAN user equipment devices for communication with said WAN base station.

12. The first user equipment of claim 11, wherein said WAN base station is not a member of said P2P group.

13. An apparatus for reducing interference in a wireless system, comprising:

a P2P communications module configured to directly communicate using uplink resources with a second user equipment;

a receiver configured to receive interference from a third user equipment communicating with a wide area network (WAN) base station that degrades the direct communication with the second user equipment; and

a reporting module configured to identify an interfering resource using at least energy received from the interfering resource, identifying said interfering resource including identifying that the interfering resource is desensing said receiver and at least one of;

a period of the interference, time when the interference is present, or subframes in which the interference is present and report the interfering resource to the WAN base station for mitigation by the base station of the interference, wherein reporting the interfering resource to the WAN base station for mitigation of the interference includes using uplink communications resources allocated by said WAN base station to a peer to peer (P2P) group for P2P communications to report the interfering resource to the WAN base station, said uplink resources allocated by said WAN base station for P2P communication being separate in time or frequency from communications resources allocated for use by WAN user equipment devices for communication with said WAN base station.

14. The apparatus of claim 13, wherein the WAN base station is not a member of said P2P group.

15. The apparatus of claim 13,

wherein during desensing the apparatus is unable to directly identify an interfering device using the interfering resource;

and

wherein the reporting module is configured to identify at least an interference time slot.

16. The apparatus of claim 13, wherein the interference comprises periodic interference.

17. The apparatus of claim 13, wherein identifying characteristics of the interfering resource comprise a period or frequency of the interference.

18. The apparatus of claim 13, wherein identifying characteristics of the interfering resource comprise a severity of the interference.

19. The apparatus of claim 13, wherein identifying characteristics of the interfering resource comprise an uplink control channel.

20. A-non-transitory computer-readable medium associated with a first user equipment comprising processor executable code, the code comprising:

code for causing at least one processor to directly communicate using uplink resources with a second user equipment;

code for causing the at least one processor to identify an interfering resource using at least energy received from the interfering resource, said identifying including identifying that the interfering resource is desensing a receiver of the first user equipment and at least one of the period of the interference, time when the interference is present or subframes in which the interference is present; and

code for causing the at least one processor to report the interfering resource to a wide area network (WAN) base station for mitigation by the base station of the interference, wherein reporting the interfering resource to the WAN base station for mitigation of the interference includes using uplink communications resources allocated by said WAN base station to a peer to peer (P2P) group for P2P communications to report the interfering resource to the WAN base station, said uplink resources allocated by said WAN base station for P2P communication being separate in time or frequency from communications resources allocated for use by WAN user equipment devices for communication with said WAN base station.

21. The non-transitory computer-readable medium of claim 20, wherein the WAN base station is not a member of said P2P group.

22. The non-transitory computer-readable medium of claim 20, wherein during desensing the first user equipment is unable to directly identify an interfering device using the interfering resource;

and

wherein identifying the interfering resource comprises identifying at least an interference time slot.

23. The non-transitory computer-readable medium of claim 20, wherein the interference comprises periodic interference.

24. The non-transitory computer-readable medium of claim 20, wherein the code for causing the at least one processor to report the interfering resource includes code for causing the at least one processor to report a severity of the interference.

25. The non-transitory computer-readable medium of claim 20, wherein the identifying characteristics comprise an uplink control channel.

26. A non-transitory computer-readable medium for use in a mobile device, the non-transitory computer-readable medium comprising processor executable code, the code comprising:

code for causing at least one processor to at least partially identify an interfering resource using at least energy received from the interfering resource, said identifying including identifying that the interfering resource is desensing a receiver of the mobile device and at least one of;

a period of the interference, time when the interference is present, or subframes in which the interference is present; and

code for causing the at least one processor to report the interfering resource to a wide area network (WAN) base station for mitigation of the interference, wherein reporting the interfering resource to the WAN base station for mitigation of the interference includes using uplink communications resources allocated by said WAN base station to a peer to peer (P2P) group for P2P communications to report the interfering resource to the WAN base station, said uplink resources allocated by said WAN base station for P2P communication being separate in time or frequency from communications resources allocated for use by WAN user equipment devices for communication with said WAN base station.