Systems and Techniques for Radio Frequency Environment Awareness and Adaptation

• US 20070280332A1
• Filed: 12/30/2006
• Published: 12/06/2007
• Est. Priority Date: 06/05/2006
• Status: Abandoned Application

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Srikanteswara, Srikathyayani, Maciocco, Christian, Guo, Xingang, Yang, Hua
• Application Number:
  US11/618,745
• Publication Number:
  US 20070280332A1
• Time in Patent Office: Days
• US Class Current: 375/130
• CPC Class Codes: H04B 1/10 Means associated with receiver for limiting or suppressing noise or interference
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02

Abstract

Various embodiments directed to a radio frequency (RF) environment aware wireless communication device to analyze interference characteristics of at least one interferer in the presence of interference in an RF communications channel and to selectively perform one or more adaptation mechanisms for adjusting properties of a communications protocol based on the interference characteristics of the at least one interferer. The interferer may comprise a non-communicating device (e.g., microwave oven) or a communicating device (e.g., baby monitor, cordless phones, Bluetooth device, etc.) operating within or in the vicinity of a wireless network. The adaptation mechanisms may comprise contention window control to backoff and defer transmission according to a contention window and to leave a backoff counter of the contention window unchanged if the interference is determined to be non-802.11 interference. The adaptation mechanisms may comprise aggressive transmission to transmit over the interference. Other embodiments are described and claimed.

Claims

1. An apparatus comprising:

a wireless communications device to analyze interference characteristics of at least one interferer in the presence of interference in a radio frequency communications channel, the wireless communications device to selectively perform one or more adaptation mechanisms for adjusting properties of a communications protocol based on the interference characteristics of the at least one interferer.

2. The apparatus of claim 1, the wireless communications device implemented as at least one of a transmitting device and a receiving device.

3. The apparatus of claim 1, the wireless communications device to perform spectrum sensing to detect the interference characteristics of the at least one interferer.

4. The apparatus of claim 1, the interference characteristics comprising one or more of type, periodicity, and energy level.

5. The apparatus of claim 1, the interferer comprising a non-communicating device.

6. The apparatus of claim 5, the non-communicating device comprising a microwave oven.

7. The apparatus of claim 1, the interferer comprising a communicating device.

8. The apparatus of claim 7, the communicating device comprising at least one of a baby monitor, a cordless phone, and a Bluetooth device.

9. The apparatus of claim 1, the wireless communications device comprising an 802.11 device, and the interferer comprising a non-802.11 device.

10. The apparatus of claim 1, the interferer operating in an unlicensed frequency band.

11. The apparatus of claim 1, the wireless communications device to differentiate among devices which do not operate according to the communications protocol.

12. The apparatus of claim 1, the wireless communications device to exchange interference characteristics with one or more network devices within a wireless network.

13. The apparatus of claim 12, the wireless network arranged to operate in at least one of an infrastructure, ad-hoc, and peer-to-peer mode.

14. The apparatus of claim 1, the adaptation mechanisms implemented by a Medium Access Control (MAC) layer of the wireless communications device.

15. The apparatus of claim 1, the adaptation mechanisms implemented by a Physical (PHY) physical layer of the wireless communications device.

16. The apparatus of claim 1, the adaptation mechanisms comprising contention window control to backoff and defer transmission according to a contention window and to leave a backoff counter of the contention window unchanged if the interference is determined to be non-802.11 interference.

17. The apparatus of claim 16, the contention window control to determine whether the interference is from a non-802.11 device in the event of an unsuccessful transmission.

18. The apparatus of claim 16, the contention window control to increase the backoff counter of the contention window if the interference is determined to be 802.11 interference.

19. The apparatus of claim 16, the contention window control to transmit during silent periods of a duty cycle of the interferer.

20. The apparatus of claim 1, the adaptation mechanisms comprising aggressive transmission to transmit over the interference.

21. The apparatus of claim 20, the aggressive transmission to detect interference caused by a non-communicating device.

22. The apparatus of claim 20, the aggressive transmission to increase a clear channel assessment (CCA) threshold if a sufficient signal-to-noise ration (SNR) is available.

23. The apparatus of claim 20, the aggressive transmission to select an appropriate modulation rate for transmission based on an RF environment of a receiving device.

24. The apparatus of claim 23, the modulation rate selected based on a SNR estimated by the receiving device.

25. A method comprising:

analyzing interference characteristics of at least one interferer in the presence of interference in a radio frequency communications channel; and

selectively performing one or more adaptation mechanisms for adjusting properties of a communications protocol based on the interference characteristics of the at least one interferer.

26. The method of claim 25, further comprising performing spectrum sensing to detect the interference characteristics of the at least one interferer.

27. The method of claim 25, further comprising differentiating among devices which do not operate according to the communications protocol.

28. The method of claim 25, the adaptation mechanisms implemented by a Medium Access Control (MAC) layer of a wireless communications device.

29. The method of claim 25, the adaptation mechanisms implemented by a Physical (PHY) physical layer of a wireless communications device.

30. The method of claim 25, further comprising performing contention window control to backoff and defer transmission according to a contention window and to leave a backoff counter of the contention window unchanged if the interference is determined to be non-802.11 interference.

31. The method of claim 30, further comprising determining whether the interference is from a non-802.11 device in the event of an unsuccessful transmission.

32. The method of claim 30, further comprising increasing the backoff counter of the contention window if the interference is determined to be 802.11 interference.

33. The method of claim 30, further comprising transmitting during silent periods of a duty cycle of the interferer.

34. The method of claim 25, further comprising performing aggressive transmission to transmit over the interference.

35. The method of claim 34, further comprising detecting interference caused by a non-communicating device.

36. The method of claim 34, further comprising increasing a clear channel assessment (CCA) threshold if a sufficient signal-to-noise ration (SNR) is available.

37. The method of claim 34, further comprising selecting an appropriate modulation rate for transmission based on an RF environment of a receiving device.

38. The method of claim 37, further comprising selecting the modulation rate based on a SNR estimated by the receiving device.

39. An article comprising a computer-readable storage medium containing instructions that if executed enable a system to:

analyze interference characteristics of at least one interferer in the presence of interference in a radio frequency communications channel; and

selectively perform one or more adaptation mechanisms for adjusting properties of a communications protocol based on the interference characteristics of the at least one interferer.

40. The article of claim 39, further comprising instructions that if executed enable the system to perform spectrum sensing to detect the interference characteristics of the at least one interferer.

41. The article of claim 39, further comprising instructions that if executed enable the system to differentiate among devices which do not operate according to the communications protocol.

42. The article of claim 39, the adaptation mechanisms implemented by a Medium Access Control (MAC) layer of a wireless communications device.

43. The article of claim 39, the adaptation mechanisms implemented by a Physical (PHY) physical layer of a wireless communications device.

44. The article of claim 39, further comprising instructions that if executed enable the system to perform contention window control to backoff and defer transmission according to a contention window and to leave a backoff counter of the contention window unchanged if the interference is determined to be non-802.11 interference.

45. The article of claim 44, further comprising instructions that if executed enable the system to determine whether the interference is from a non-802.11 device in the event of an unsuccessful transmission.

46. The article of claim 44, further comprising instructions that if executed enable the system to increase the backoff counter of the contention window if the interference is determined to be 802.11 interference.

47. The article of claim 44, further comprising instructions that if executed enable the system to transmit during silent periods of a duty cycle of the interferer.

48. The article of claim 39, further comprising instructions that if executed enable the system to perform aggressive transmission to transmit over the interference.

49. The article of claim 48, further comprising instructions that if executed enable the system to detect interference caused by a non-communicating device.

50. The article of claim 48, further comprising instructions that if executed enable the system to increase a clear channel assessment (CCA) threshold if a sufficient signal-to-noise ration (SNR) is available.

51. The article of claim 48, further comprising instructions that if executed enable the system to select an appropriate modulation rate for transmission based on an RF environment of a receiving device.

52. The article of claim 48, further comprising instructions that if executed enable the system to select the modulation rate based on a SNR estimated by the receiving device.

53. A system comprising:

an antenna; and

a wireless communications device to couple to the antenna, the wireless communications device comprising a radio frequency (RF) environment awareness and adaptation module to analyze interference characteristics of at least one interferer in the presence of interference in an RF communications channel and to selectively perform one or more adaptation mechanisms for adjusting properties of a communications protocol based on the interference characteristics of the at least one interferer.

54. The system of claim 53, the interferer comprising a non-communicating device.

55. The system of claim 54, the non-communicating device comprising a microwave oven.

56. The system of claim 53, the interferer comprising a communicating device.

57. The system of claim 56, the communicating device comprising at least one of a baby monitor, a cordless phone, and a Bluetooth device.

58. The system of claim 53, the wireless communications device comprising an 802.11 device, and the interferer comprising a non-802.11 device.

59. The system of claim 53, the adaptation mechanisms comprising contention window control to backoff and defer transmission according to a contention window and to leave a backoff counter of the contention window unchanged if the interference is determined to be non-802.11 interference.

60. The system of claim 53, the adaptation mechanisms comprising aggressive transmission to transmit over the interference.