DYNAMIC INTERFERENCE CONTROL IN A WIRELESS COMMUNICATION NETWORK

• US 20090175324A1
• Filed: 01/04/2008
• Published: 07/09/2009
• Est. Priority Date: 01/04/2008
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sampath, Ashwin, Horn, Gavin Bernard
• Application Number:
  US11/969,775
• Publication Number:
  US 20090175324A1
• Time in Patent Office: Days
• US Class Current: 375/222
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 74/0841 with collision treatment

Abstract

A method and apparatus for dynamic interference management is disclosed. A frequency channel is partitioned into a plurality of groups. Two or more groups are assigned weights reflecting degrees of disadvantage of a node. Each group is further partitioned into a plurality of tones. A node experiencing interference determines a group, selects a tone within the group, and transmits a wireless signal using the selected tone. A receiving node receives a plurality of tones including the selected tone, identifies active tones from the received tones, and determines a response based on the weights of the active tones.

Claims

1. A method of wireless communications comprising:

determining a group of tones from a plurality of groups of tones;

selecting a tone in the group; and

transmitting a wireless signal using the tone.

2. The method of claim 1 wherein the tone is selected as a function of one or more of a system time, a frame index, a node identifier, and a link identifier.

3. The method of claim 1 wherein the selection comprises selecting the tone pseudo-randomly.

4. The method of claim 1 wherein the tone is selected based on input from another node.

5. The method of claim 1 wherein at least two groups of the plurality of groups of tones comprise one of:

the same number of tones or different numbers of tones.

6. The method of claim 1 wherein the wireless signal comprises a broadcast signal.

7. The method of claim 1 wherein each group corresponds to a weight, wherein at least one of the weights is different from another.

8. The method of claim 7 wherein the weight comprises a measure of one or more of an interference over thermal noise (IOT), a carrier-to-interference ratio (C/I), a spectral efficiency, a latency, a data rate, a throughput, and a traffic class.

9. The method of claim 4 further comprising transmitting another wireless signal to the another node, the another wireless signal comprising an identity of the group.

10. The method of claim 1 wherein at least one group of the plurality of groups of tones comprises one of:

all the tones of the group are contiguous in frequency or not all of the tones of the group are contiguous in frequency.

11. An apparatus for wireless communications, comprising:

a processing system configured to determine a group of tones from a plurality of groups of tones, select a tone in the group, and transmit a wireless signal using the tone.

12. The apparatus of claim 11 wherein the tone is selected as a function of one or more of a system time, a frame index, a node identifier, and a link identifier.

13. The apparatus of claim 11 wherein the selection comprises selecting the tone pseudo-randomly.

14. The apparatus of claim 11 wherein the tone is selected based on input from another node.

15. The apparatus of claim 11 wherein at least two groups of the plurality of groups of tones comprise one of:

the same number of tones or different numbers of tones.

16. The apparatus of claim 11 wherein the wireless signal comprises a broadcast signal.

17. The apparatus of claim 11 wherein each group corresponds to a weight, wherein at least one of the weights is different from another.

18. The apparatus of claim 17 wherein the weight comprises a measure of one or more of an interference over thermal noise (IOT), a carrier-to-interference ratio (C/I), a spectral efficiency, a latency, a data rate, a throughput, and a traffic class.

19. The apparatus of claim 14 wherein the processing system is further configured to transmit another wireless signal to the another node, the another wireless signal comprising an identity of the group.

20. The apparatus of claim 11 wherein at least one group of the plurality of groups of tones comprises one of:

all the tones of the group are contiguous in frequency or not all of the tones of the group are contiguous in frequency.

21. An apparatus for wireless communications, comprising:

means for determining a group of tones from a plurality of groups of tones;

means for selecting a tone in the group; and

means for transmitting a wireless signal using the tone.

22. The apparatus of claim 21 wherein the tone is selected as a function of one or more of a system time, a frame index, a node identifier, and a link identifier.

23. The apparatus of claim 21 wherein the selection comprises selecting the tone pseudo-randomly.

24. The apparatus of claim 21 wherein the tone is selected based on input from another node.

25. The apparatus of claim 21 wherein at least two groups of the plurality of groups of tones comprise one of:

the same number of tones or different numbers of tones.

26. The apparatus of claim 21 wherein the wireless signal comprises a broadcast signal.

27. The apparatus of claim 21 wherein each group corresponds to a weight, wherein at least one of the weights is different from another.

28. The apparatus of claim 27 wherein the weight comprises a measure of one or more of an interference over thermal noise (IOT), a carrier-to-interference ratio (C/I), a spectral efficiency, a latency, a data rate, a throughput, and a traffic class.

29. The apparatus of claim 24 further comprising means for transmitting another wireless signal to the another node, the another wireless signal comprising an identity of the group.

30. The apparatus of claim 21 wherein at least one group of the plurality of groups of tones comprises one of:

all the tones of the group are contiguous in frequency or not all of the tones of the group are contiguous in frequency.

31. An access terminal comprising:

an antenna;

a screen for providing a user interface;

one or more input keys for displaying symbols on the screen; and

a processing system configured to determine a group of tones from a plurality of groups of tones, select a tone in the group, and transmit from the antenna a wireless signal using the tone.

32. An access point comprising:

an antenna;

a transmitter configured to transmit wireless signals on the antenna; and

a processing system configured to determine a group of tones from a plurality of groups of tones, select a tone in the group, and transmit from the transmitter the wireless signal using the tone.

33. A method of wireless communications comprising:

receiving a plurality of tones;

identifying as active tones the received tones that comprise a measure of energy satisfying a condition;

identifying a group for each active tone, each group comprising a weight; and

determining a response based on the weights of the active tones.

34. The method of claim 33 wherein the weights comprise a measure of one or more of an interference over thermal noise (IOT), a carrier-to-interference ratio (C/I), a spectral efficiency, a latency, a data rate, a throughput, and a traffic class.

35. The method of claim 33 further comprising identifying whether each of the active tones is received from an associated node.

36. The method of claim 33 wherein the determining the response further comprises establishing one or more priority tones from the active tones based on the weights.

37. The method of claim 36 wherein the response comprises one of:

(a) abstaining from transmitting for a time on a frequency band over which the one or more priority tones are received; and

(b) transmitting a signal on the frequency band at a power based in part on the measure of energy of the one or more priority tones.

38. The method of claim 36 wherein the determining the response further comprises determining that the one or more priority tones comprise a weight indicating a greater degree of disadvantage than any active tone received from an associated node.

39. The method of claim 36 wherein the establishing further comprises determining that the one or more active tones are received from non-associated nodes.

40. The method of claim 33 further comprising receiving from an associated node a wireless signal comprising an identity of the corresponding group.

41. The method of claim 35 wherein identifying an active tone as received from an associated node is a function of one or more of a system time, a frame index, a node identifier, and a link identifier.

42. The method of claim 35 wherein a pseudo-random formula is used to identify an active tone as received from an associated node.

43. The method of claim 33 wherein at least two of the identified groups comprise one of:

the same number of tones and different numbers of tones.

44. The method of claim 33 wherein a plurality of active tones that correspond to a single group are one of:

all contiguous and not all contiguous.

45. The method of claim 33 comprising ordering the active tones within each group.

46. The method of claim 45 wherein a plurality of active tones corresponding to one of the groups are ordered according to a position of each active tone within the corresponding group.

47. The method of claim 45 wherein a plurality of active tones corresponding to one of the groups are ordered as a function of a number of the active tones within the corresponding group.

48. An apparatus for wireless communications, comprising:

a processing system configured to receive a plurality of tones, identify as active tones the received tones that comprise a measure of energy satisfying a condition, identify a group for each active tone, each group comprising a weight, and determine a response based on the weights of the active tones.

49. The apparatus of claim 48 wherein the weights comprise a measure of one or more of an interference over thermal noise (IOT), a carrier-to-interference ratio (C/I), a spectral efficiency, a latency, a data rate, a throughput, and a traffic class.

50. The apparatus of claim 48 wherein the processing system is further configured to identify whether each of the active tones is received from an associated node.

51. The apparatus of claim 48 wherein the determining the response further comprises establishing one or more priority tones from the active tones based on the weights.

52. The apparatus of claim 51 wherein the response comprises one of:

(a) abstaining from transmitting for a time on a frequency band over which the one or more priority tones are received; and

(b) transmitting a signal on the frequency band at a power based in part on the measure of energy of the one or more priority tones.

53. The apparatus of claim 51 wherein the determining the response further comprises determining that the one or more priority tones comprise a weight indicating a greater degree of disadvantage than any active tone received from an associated node.

54. The apparatus of claim 51 wherein the establishing further comprises determining that the one or more active tones are received from non-associated nodes.

55. The apparatus of claim 48 wherein the processing system is further configured to receive from an associated node a wireless signal comprising an identity of the corresponding group.

56. The apparatus of claim 50 wherein identifying an active tone as received from an associated node is a function of one or more of a system time, a frame index, a node identifier, and a link identifier.

57. The apparatus of claim 50 wherein a pseudo-random formula is used to identify an active tone as received from an associated node.

58. The apparatus of claim 48 wherein at least two of the identified groups comprise one of:

the same number of tones and different numbers of tones.

59. The apparatus of claim 48 wherein a plurality of active tones that correspond to a single group are one of:

all contiguous and not all contiguous.

60. The apparatus of claim 48 wherein the processing system is further configured to order the active tones within each group.

61. The apparatus of claim 60 wherein a plurality of active tones corresponding to one of the groups are ordered according to a position of each active tone within the corresponding group.

62. The apparatus of claim 60 wherein a plurality of active tones corresponding to one of the groups are ordered as a function of a number of the active tones within the corresponding group.

63. An apparatus for wireless communications comprising:

means for receiving a plurality of tones;

means for identifying as active tones the received tones that comprise a measure of energy satisfying a condition;

means for identifying a group for each active tone, each group comprising a weight; and

means for determining a response based on the weights of the active tones.

64. The apparatus of claim 63 wherein the weights comprise a measure of one or more of an interference over thermal noise (IOT), a carrier-to-interference ratio (C/I), a spectral efficiency, a latency, a data rate, a throughput, and a traffic class.

65. The apparatus of claim 63 further comprising means for identifying whether each of the active tones is received from an associated node.

66. The apparatus of claim 63 wherein the determining the response further comprises establishing one or more priority tones from the active tones based on the weights.

67. The apparatus of claim 66 wherein the response comprises one of:

(a) abstaining from transmitting for a time on a frequency band over which the one or more priority tones are received; and

(b) transmitting a signal on the frequency band at a power based in part on the measure of energy of the one or more priority tones.

68. The apparatus of claim 66 wherein the determining the response further comprises determining that the one or more priority tones comprise a weight indicating a greater degree of disadvantage than any active tone received from an associated node.

69. The apparatus of claim 66 wherein the means for establishing further comprises means for determining that the one or more active tones are received from non-associated nodes.

70. The apparatus of claim 63 further comprising means for receiving from an associated node a wireless signal comprising an identity of the corresponding group.

71. The apparatus of claim 65 wherein identifying an active tone as received from an associated node is a function of one or more of a system time, a frame index, a node identifier, and a link identifier.

72. The apparatus of claim 65 wherein a pseudo-random formula is used to identify an active tone as received from an associated node.

73. The apparatus of claim 63 wherein at least two of the identified groups comprise one of:

the same number of tones and different numbers of tones.

74. The apparatus of claim 63 wherein a plurality of active tones that correspond to a single group are one of:

all contiguous and not all contiguous.

75. The apparatus of claim 63 further comprising means for ordering the active tones within each group.

76. The apparatus of claim 75 wherein a plurality of active tones corresponding to one of the groups are ordered according to a position of each active tone within the corresponding group.

77. The apparatus of claim 76 wherein a plurality of active tones corresponding to one of the groups are ordered as a function of a number of the active tones within the corresponding group.

78. An access terminal comprising:

a screen for providing a user interface;

one or more input keys for displaying symbols on the screen;

a receiver configured to receive a plurality of tones; and

a processing system configured to identify as active tones the received tones that comprise a measure of energy satisfying a condition, identify a group for each active tone, each group comprising a weight, and determine a response based on the weights of the active tones.

79. An access point comprising:

an antenna;

a receiver configured to receive a plurality of tones on the antenna; and

a processing system configured to identify as active tones the received tones that comprise a measure of energy satisfying a condition, identify a group 5for each active tone, each group comprising a weight, and determine a response based on the weights of the active tones.

80. A computer-program product comprising a machine-readable medium comprising instructions executable by a machine for performing a method of wireless communications, the instructions configured when run to cause the machine to determine a group of tones from a plurality of groups of tones, select a tone in the group, and transmit a wireless signal using the tone.

81. A computer-program product comprising a machine-readable medium comprising instructions executable by a machine for performing a method of wireless communications, the instructions configured when run to cause the machine to receive a plurality of tones, identify as active tones the received tones that comprise a measure of energy satisfying a condition, identify a group for each active tone, each group comprising a weight, and determine a response based on the weights of the active tones.