METHOD AND APPARATUS FOR REDUCING INTERFERENCE IN A WIRELESS SYSTEM

• US 20130295976A1
• Filed: 05/04/2012
• Published: 11/07/2013
• Est. Priority Date: 05/04/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Patil, Shailesh, Li, Junyi, Wang, Hua
• Granted Patent: US 9,125,096 B2
• Time in Patent Office: Days
• US Class Current: 455/501
• 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; and

the mobile device reporting the interfering resource to a base station for mitigation of the interference.

2. The method of claim 1, wherein the identifying comprises extracting, from the received energy, information distinguishing the interfering resource from other devices.

3. The method of claim 1, wherein the identifying comprises identifying at least one item selected from the group consisting of a communication time slot of the interfering resource and a communication frequency 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 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, wherein said identifying comprises identifying that the interfering resource is desensing a receiver of the mobile device.

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

a base station receiving information regarding interference disturbing direct wireless communication between two mobile communication devices;

the base station identifying a source of the interference based on the received information; and

the base station mitigating the interference.

11. The method of claim 10, wherein the base station is non-participating in the direct wireless communication.

12. The method of claim 10, wherein the mitigating comprises modifying communications between the base station and the source.

13. The method of claim 10, wherein the identifying comprises using location information of the source and location information of one of the two mobile communication devices disturbed by the interference.

14. The method of claim 10, wherein the mitigating comprises instructing the source to reduce its transmit power level.

15. The method of claim 10, wherein the mitigating comprises instructing the source to transmit future communication on a different resource block of an LTE subframe than that used by the source for past communication.

16. The method of claim 10, wherein the mitigating comprises instructing the source to transmit future communication on a different subframe of an LTE radio frame than that used by the source for past communications.

17. The method of claim 10, wherein the mitigating comprises instructing at least one of the two mobile communication devices to transmit future communication using a different subset of subframes of an LTE radio frame than those used by the at least one of the two mobile communication devices for past communications.

18. The method of claim 10, wherein the information regarding interference comprises information regarding periodic interference.

19. 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 base station that degrades the direct communication between the first user equipment and the second user equipment; and

the first user equipment reporting identifying characteristics of the third user equipment to the base station for mitigation by the base station of the interference.

20. A base station for reducing interference in a wireless system, comprising:

means for;

receiving information regarding interference disturbing direct wireless communication between two mobile communication devices; and

identifying a source of the interference based on the received information; and

means for instructing the source of the interference to modify communications to mitigate the interference.

21. The base station of claim 20, further comprising means for instructing at least one of the two mobile communication devices to modify the direct wireless communication.

22. 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 base station that degrades the direct communication with the second user equipment; and

reporting identifying characteristics of the third user equipment to the base station for mitigation by the base station of the interference.

23. The first user equipment of claim 22, further comprising means for modifying the direct communication with the second user equipment in response to receiving instruction from the base station to modify the direct communication with the second user equipment.

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

a feedback reception module configured to;

receive information regarding interference disturbing direct wireless communication between two mobile communication devices;

identify a source of the interference based on the received information;

an interference management module configured to create instructions to mitigate the interference; and

a transmitter configured to communicate the instructions.

25. The apparatus of claim 24, wherein the instructions comprise instructions to the source to modify communications between a base station and the source.

26. The apparatus of claim 24, wherein the identification of the source comprises using location information of the source and location information of the one of the two mobile communication devices disturbed by the interference.

27. The apparatus of claim 24, wherein the instructions comprise instructions to the source to reduce its transmit power level.

28. The apparatus of claim 24, wherein the instructions comprise instructions to the source to transmit future communication on a different resource block of a control channel than that used by the source for past communication.

29. The apparatus of claim 24, wherein the instructions comprise instructions to the source to transmit future communication on a different subframe of a control channel than that used by the source for past communications.

30. The apparatus of claim 24, wherein the instructions comprise instructions to the source to transmit future communication using a different subset of subframes of a control channel than that used by the source for past communications.

31. 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 base station that degrades the direct communication with the second user equipment; and

a reporting module configured to report identifying characteristics of the third user equipment to the base station for mitigation by the base station of the interference.

32. The apparatus of claim 31, wherein the reporting module is further configured to extract, from the identifying characteristics, information distinguishing the third user equipment from other devices.

33. The apparatus of claim 31, wherein the interference comprises at least one item selected from the group consisting of:

an interference time slot; and

an interference frequency.

34. The apparatus of claim 31, wherein the interference comprises periodic interference.

35. The apparatus of claim 31, wherein the identifying characteristics comprise a period or frequency of the interference.

36. The apparatus of claim 31, wherein the identifying characteristics comprise a severity of the interference.

37. The apparatus of claim 31, wherein the identifying characteristics comprise an uplink control channel.

38. A computer program product, comprising:

a non-transitory computer-readable medium associated with a first user equipment, 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 interference from a third user equipment communicating with a base station that degrades the direct communication with the second user equipment; and

code for causing the at least one processor to report identifying characteristics of the third user equipment to the base station for mitigation by the base station of the interference.

39. The computer program product of claim 38, further comprising code for causing the at least one processor to extract, from the identifying characteristics, information distinguishing the third user equipment from other devices.

40. The computer program product of claim 38, wherein the interference comprises at least one item selected from the group consisting of:

an interference time slot; and

an interference frequency.

41. The computer program product of claim 38, wherein the interference comprises periodic interference.

42. The computer program product of claim 38, wherein the identifying characteristics comprise a severity of the interference.

43. The computer program product of claim 38, wherein the identifying characteristics comprise an uplink control channel.

44. A computer program product, comprising:

a non-transitory computer-readable medium associated with a base station, comprising;

code for causing at least one processor to receive information regarding interference disturbing direct wireless communication between two mobile communication devices;

code for causing the at least one processor to identify a source of the interference, external to the direct communication, based on the received information; and

code for causing the at least one processor to instruct the source of the interference to modify communications to mitigate the interference.

45. The computer program product of claim 44, wherein the instructed modification comprises modified communications between the base station and the source.

46. The computer program product of claim 44, wherein the identification of the source comprises using location information of the source and location information of the one of the two mobile communication devices disturbed by the interference.

47. The computer program product of claim 44, wherein the instruction comprises an instruction to the source to reduce its transmit power level.

48. The computer program product of claim 44, wherein the instruction comprises an instruction to the source to transmit future communication on a different resource block of a control channel than that used by the source for past communication.

49. The computer program product of claim 44, wherein the instruction comprises an instruction to the source to transmit future communication on a different subframe of a control channel than that used by the source for past communications.

50. The computer program product of claim 44, wherein the instruction comprises an instruction to the source to transmit future communication using a different subset of subframes of a control channel than that used by the source for past communications.

51. A computer program product, comprising:

a non-transitory computer-readable medium, 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; and

code for causing the at least one processor to report the interfering resource to a base station for mitigation of the interference.