MULTICARRIER RETRANSMISSION FEEDBACK

• US 20110116457A1
• Filed: 05/05/2010
• Published: 05/19/2011
• Est. Priority Date: 05/07/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Bhushan, Naga, Montojo, Juan, Chen, Wanshi, Khandekar, Aamod Dinkar, Gaal, Peter, Damnjanovic, Jelena M.
• Granted Patent: US 8,885,479 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Systems and methodologies are described that facilitate indicating feedback parameters for multiple single carrier assignments, multicarrier assignments, and/or the like according to single carrier-frequency division multiple access (SC-FDMA), relaxed SC-FDMA, etc. Feedback in relaxed SC-FDMA can be bundled by a mobile device to conserve power. In addition, a downlink assignment indicator (DAI) can be utilized to detect and indicate lost grants.

Claims

1. A method, comprising:

receiving a plurality of downlink resource grants related to a plurality of carriers for data transmission;

obtaining a downlink assignment index (DAI) related to each of the plurality of downlink resource grants; and

determining one or more lost downlink resource grants based at least in part on the DAI related to each of the plurality of downlink resource grants.

2. The method of claim 1, further comprising indicating a non-acknowledgement feedback parameter for the one or more lost downlink resource grants.

3. The method of claim 2, further comprising transmitting the non-acknowledgement feedback parameter with one or more additional feedback parameters to a device, wherein the plurality of downlink resource grants are received from the device.

4. The method of claim 3, wherein the transmitting the non-acknowledgement feedback parameter with the one or more additional feedback parameters includes indicating the non-acknowledgement feedback parameter and the one or more additional feedback parameters in bits represented by one or more cyclic shifts or orthogonal sequences utilized in transmitting related uplink communications to the device.

5. The method of claim 1, wherein the determining one or more lost downlink resource grants includes:

determining a sequence number for each of the plurality of downlink resource grants from the DAI related to each of the plurality of downlink resource grants; and

detecting an absent sequence number related to one or more lost downlink resource grants based at least in part on the sequence number for each of the plurality of downlink resource grants.

6. The method of claim 5, wherein the determining the sequence number for each of the plurality of downlink resource grants includes applying a mapping or a function based at least in part on the DAI related to each of the plurality of downlink resource grants.

7. The method of claim 5, wherein the sequence number for each of the plurality of downlink resource grants relates to a sequence of each downlink resource grant within the plurality of downlink resource grants across the plurality of carriers.

8. The method of claim 5, wherein the receiving the plurality of downlink resource grants includes receiving the plurality of downlink resource grants related to the plurality of carriers across a plurality of subframes.

9. The method of claim 8, wherein the sequence number for each of the plurality of downlink resource grants relates to a sequence of each downlink resource grant within the plurality of downlink resource grants with respect to each independent carrier of the plurality of carriers over the plurality of subframes.

10. The method of claim 8, wherein the sequence number for each of the plurality of downlink resource grants relates to a sequence of each downlink resource grant within the plurality of downlink resource grants across the plurality of carriers in each of the plurality of subframes.

11. The method of claim 5, wherein the determining one or more lost downlink resource grants further includes:

determining a total number of resource grants transmitted by an access point from the DAI; and

detecting the absent sequence number related to the one or more lost downlink resource grants based further in part on the total number of resource grants transmitted by the access point.

12. The method of claim 1, wherein the determining one or more lost downlink resource grants includes:

determining a total number of resource grants transmitted by an access point from the DAI; and

comparing a total number of the plurality of downlink resource grants to the total number of resource grants transmitted by the access point.

13. The method of claim 12, wherein the total number of resource grants refers to the total number of resource grants across the plurality of carriers in a given subframe, the total number of resource grants across a plurality of subframes for at least one of the plurality of carriers, or the total number of resource grants across the plurality of carriers and the plurality of subframes.

14. A wireless communications apparatus, comprising:

at least one processor configured to;

obtain a plurality of downlink resource grants related to a plurality of carriers;

determine a downlink assignment index (DAI) related to at least one of the plurality of downlink resource grants; and

detect one or more lost downlink resource grants based at least in part on the DAI; and

a memory coupled to the at least one processor.

15. The wireless communications apparatus of claim 14, wherein the at least one processor is further configured to associate a non-acknowledgement feedback parameter with the one or more lost downlink resource grants.

16. The wireless communications apparatus of claim 15, wherein the at least one processor is further configured to transmit the non-acknowledgement feedback parameter with one or more additional feedback parameters to an access point.

17. The wireless communications apparatus of claim 14, wherein the at least one processor is further configured to determine a sequence number of the at least one of the plurality of downlink resource grants in the plurality of downlink resource grants or a total number of the plurality of downlink resource grants based at least in part on the DAI.

18. The wireless communications apparatus of claim 14, wherein the plurality of downlink resource grants correspond to the plurality of carriers over a plurality of subframes.

19. An apparatus, comprising:

means for receiving a plurality of downlink resource grants related to a plurality of carriers for data transmission; and

means for detecting one or more lost downlink resource grants based at least in part on a downlink assignment index (DAI) for at least one of the plurality of downlink resource grants.

20. The apparatus of claim 19, further comprising means for indicating a non-acknowledgement feedback parameter for the one or more lost downlink resource grants.

21. The apparatus of claim 20, wherein the means for indicating the non-acknowledgement feedback parameter transmits the non-acknowledgement feedback parameter with one or more additional feedback parameters to an access point.

22. The apparatus of claim 19, wherein the means for detecting one or more lost downlink resource grants further determines a sequence number for each of the plurality of downlink resource grants or a total number of the plurality of downlink resource grants from the DAI and detects the one or more lost downlink resource grants based at least in part on the sequence number or the total number of the plurality of downlink resource grants.

23. The apparatus of claim 19, wherein the plurality of downlink resource grants correspond to the plurality of carriers over a plurality of subframes.

24. A computer program product, comprising:

a computer-readable medium comprising;

code for causing at least one computer to obtain a plurality of downlink resource grants related to a plurality of carriers;

code for causing the at least one computer to determine a downlink assignment index (DAI) related to at least one of the plurality of downlink resource grants; and

code for causing the at least one computer to detect one or more lost downlink resource grants based at least in part on the DAI.

25. The computer program product of claim 24, wherein the computer-readable medium further comprises code for causing the at least one computer to associate a non-acknowledgement feedback parameter with the one or more lost downlink resource grants.

26. The computer program product of claim 25, wherein the computer-readable medium further comprises code for causing the at least one computer to transmit the non-acknowledgement feedback parameter with one or more additional feedback parameters to an access point.

27. The computer program product of claim 24, wherein the computer-readable medium further comprises code for causing the at least one computer to determine a sequence number of the at least one of the plurality of downlink resource grants in the plurality of downlink resource grants or a total number of the plurality of downlink resource grants based at least in part on the DAI.

28. The computer program product of claim 24, wherein the plurality of downlink resource grants correspond to the plurality of carriers over a plurality of subframes.

29. An apparatus, comprising:

a downlink grant receiving component that obtains a plurality of downlink resource grants related to a plurality of carriers for data transmission; and

a lost grant determining component that detects one or more lost downlink resource grants based at least in part on a downlink assignment index (DAI) for at least one of the plurality of downlink resource grants.

30. The apparatus of claim 29, further comprising a hybrid automatic repeat/request (HARQ) indicating component that specifies a non-acknowledgement feedback parameter for the one or more lost downlink resource grants.

31. The apparatus of claim 30, wherein the HARQ indicating component transmits the non-acknowledgement feedback parameter with one or more additional feedback parameters to an access point.

32. The apparatus of claim 29, wherein the lost grant determining component further determines a sequence number for each of the plurality of downlink resource grants or a total number of the plurality of downlink resource grants from the DAI and detects the one or more lost downlink resource grants based at least in part on the sequence number or the total number of the plurality of downlink resource grants.

33. The apparatus of claim 29, wherein the plurality of downlink resource grants correspond to the plurality of carriers over a plurality of subframes.

34. A method, comprising:

receiving a plurality of downlink resource grants related to a plurality of carriers for data transmission;

determining a format for providing a plurality of feedback parameters related to the plurality of downlink resource grants based at least in part on a power requirement; and

transmitting one or more of the plurality of feedback parameters based at least in part on the format.

35. The method of claim 34, wherein the determining the format for providing the plurality of feedback parameters includes determining to bundle the plurality of feedback parameters, and the transmitting the one or more of the plurality of feedback parameters includes transmitting a single feedback parameter representative of the plurality of feedback parameters.

36. The method of claim 35, wherein the transmitting the single feedback parameter includes transmitting an acknowledgement where the plurality of feedback parameters are acknowledgements, or transmitting a non-acknowledgement where at least one of the plurality of feedback parameters is non-acknowledgement.

37. The method of claim 35, wherein the transmitting the single feedback parameter includes transmitting an acknowledgement for one of the plurality of feedback parameters for which acknowledgement is indicated and a next one of the plurality of feedback parameters indicates non-acknowledgement.

38. The method of claim 35, further comprising:

obtaining a sequence number for at least one of the plurality of downlink resource grants or a total number of the plurality of downlink resource grants based at least in part on a related downlink assignment index (DAI); and

determining one or more lost downlink resource grants based at least in part on the sequence number or the total number of the plurality of downlink resource grants.

39. The method of claim 38, further comprising indicating a non-acknowledgement feedback parameter for the one or more lost downlink resource grants.

40. The method of claim 38, wherein the obtaining the sequence number for at least one of the plurality of downlink resource grants or the total number of the plurality of downlink resource grants further includes determining the sequence number or the total number of the plurality of downlink resource grants based at least in part on a mapping or a function using the related DAI.

41. The method of claim 34, further comprising obtaining an index indicating a number of downlink resource grants provided by an access point, wherein the determining one or more lost downlink resource grants is further based at least in part on the index.

42. The method of claim 34, wherein the determining the format for providing the plurality of feedback parameters includes switching between a bundling format.

43. The method of claim 34, wherein the receiving the plurality of downlink resource grants includes receiving the plurality of downlink resource grants related to the plurality of carriers that vary over a plurality of subframes.

44. A wireless communications apparatus, comprising:

at least one processor configured to;

obtain a plurality of downlink resource grants related to a plurality of carriers for data transmission;

select a format for providing a plurality of feedback parameters related to the plurality of downlink resource grants based at least in part on a power requirement; and

transmit one or more of the plurality of feedback parameters for the plurality of downlink resource grants based at least in part on the format; and

a memory coupled to the at least one processor.

45. The wireless communications apparatus of claim 44, wherein the at least one processor is further configured to bundle the plurality of feedback parameters to a single feedback parameter based at least in part on the format.

46. The wireless communications apparatus of claim 45, wherein the at least one processor bundles the plurality of feedback parameters at least in part by specifying an acknowledgement in the single feedback parameter where the plurality of feedback parameters are acknowledgements, or specifying a non-acknowledgement in the single feedback parameter where at least one of the plurality of feedback parameters is non-acknowledgement.

47. The wireless communications apparatus of claim 45, wherein the at least one processor bundles the plurality of feedback parameters at least in part by specifying an acknowledgement in the single feedback parameter, and the at least one processor transmits the single feedback parameter as the one or more of the plurality of feedback parameters over resources related to one of the plurality of feedback parameters for which acknowledgement is indicated where a next one of the plurality of feedback parameters indicates non-acknowledgement.

48. The wireless communications apparatus of claim 45, wherein the at least one processor is further configured to:

receive a sequence number for at least one of the plurality of downlink resource grants based at least in part on a related downlink assignment index; and

detect one or more lost downlink resource grants based at least in part on the sequence number.

49. The wireless communications apparatus of claim 48, wherein the at least one processor is further configured to indicate a non-acknowledgement in the one or more of the plurality of feedback parameters for the one or more lost downlink resource grants.

50. An apparatus, comprising:

means for receiving a plurality of downlink resource grants related to a plurality of carriers for data transmission;

means for determining a format for providing a plurality of feedback parameters related to the plurality of downlink resource grants based at least in part on a power requirement; and

means for transmitting one or more of the plurality of feedback parameters based at least in part on the format.

51. The apparatus of claim 50, further comprising means for bundling the plurality of feedback parameters as a single feedback parameter based at least in part on the format.

52. The apparatus of claim 51, wherein the means for bundling indicates an acknowledgement for the single feedback parameter where the plurality of feedback parameters are acknowledgements, or indicates non-acknowledgement for the single feedback parameter where at least one of the plurality of feedback parameters is non-acknowledgement.

53. The apparatus of claim 51, wherein the means for bundling indicates an acknowledgement for the single feedback parameter, and the means for transmitting transmits the single feedback parameter over resources related to one of the plurality of feedback parameters for which acknowledgement is indicated where a next one of the plurality of feedback parameters indicates non-acknowledgement.

54. The apparatus of claim 51, further comprising means for determining one or more lost downlink resource grants based at least in part on a sequence number obtained from a downlink assignment index related to one or more of the plurality of downlink resource grants.

55. The apparatus of claim 54, wherein the means for transmitting transmits non-acknowledgement for at least one of the plurality of feedback parameters, which relates to the one or more lost downlink resource grants.

56. A computer program product, comprising:

a computer-readable medium comprising;

code for causing at least one computer to obtain a plurality of downlink resource grants related to a plurality of carriers for data transmission;

code for causing the at least one computer to select a format for providing a plurality of feedback parameters related to the plurality of downlink resource grants based at least in part on a power requirement; and

code for causing the at least one computer to transmit one or more of the plurality of feedback parameters for the plurality of downlink resource grants based at least in part on the format.

57. The computer program product of claim 56, wherein the computer-readable medium further comprises code for causing the at least one computer to bundle the plurality of feedback parameters to a single feedback parameter based at least in part on the format.

58. The computer program product of claim 57, wherein the code for causing the at least one computer to bundle bundles the plurality of feedback parameters at least in part by specifying an acknowledgement in the single feedback parameter where the plurality of feedback parameters are acknowledgements, or by specifying a non-acknowledgement in the single feedback parameter where at least one of the plurality of feedback parameters is non-acknowledgement.

59. The computer program product of claim 57, wherein the code for causing the at least one computer to bundle bundles the plurality of feedback parameters at least in part by specifying an acknowledgement in the single feedback parameter, and the code for causing the at least one computer to transmit transmits the single feedback parameter as the one or more of the plurality of feedback parameters over resources related to one of the plurality of feedback parameters for which acknowledgement is indicated where a next one of the plurality of feedback parameters indicates non-acknowledgement.

60. The computer program product of claim 57, wherein the computer-readable medium further comprises:

code for causing the at least one computer to receive a sequence number for at least one of the plurality of downlink resource grants based at least in part on a related downlink assignment index; and

code for causing the at least one computer to detect one or more lost downlink resource grants based at least in part on the sequence number.

61. The computer program product of claim 60, wherein the computer-readable medium further comprises code for causing the at least one computer to indicate a non-acknowledgement in the one or more of the plurality of feedback parameters for the one or more lost downlink resource grants.

62. An apparatus, comprising:

a downlink grant receiving component that obtains a plurality of downlink resource grants related to a plurality of carriers for data transmission;

a hybrid automatic repeat/request (HARQ) format selecting component that determines a format for providing a plurality of feedback parameters related to the plurality of downlink resource grants based at least in part on a power requirement; and

a HARQ indicating component that transmits one or more of the plurality of feedback parameters based at least in part on the format.

63. The apparatus of claim 62, further comprising a HARQ feedback bundling component that combines the plurality of feedback parameters in a single feedback parameter based at least in part on the format.

64. The apparatus of claim 63, wherein the HARQ feedback bundling component indicates an acknowledgement for the single feedback parameter where the plurality of feedback parameters are acknowledgements, or indicates non-acknowledgement for the single feedback parameter where at least one of the plurality of feedback parameters is non-acknowledgement.

65. The apparatus of claim 63, wherein the HARQ feedback bundling component indicates an acknowledgement for the single feedback parameter, and the HARQ indicating component transmits the single feedback parameter over resources related to one of the plurality of feedback parameters for which acknowledgement is indicated where a next one of the plurality of feedback parameters indicates non-acknowledgement.

66. The apparatus of claim 63, further comprising a lost grant determining component that detects one or more lost downlink resource grants based at least in part on a sequence number obtained from a downlink assignment index related to one or more of the plurality of downlink resource grants.

67. The apparatus of claim 66, wherein the HARQ indicating component transmits non-acknowledgement for at least one of the plurality of feedback parameters, which relates to the one or more lost downlink resource grants.

68. A method, comprising:

generating a plurality of downlink resource grants for a device to facilitate communicating therewith;

indicating a sequence number of at least one of the plurality of downlink resource grants or a total number of the plurality of downlink resource grants by utilizing a downlink assignment index of at least one of the plurality of downlink resource grants; and

transmitting the plurality of downlink resource grants to the device.

69. The method of claim 68, further comprising receiving one or more feedback parameters related to the plurality of downlink resource grants.

70. The method of claim 69, further comprising determining whether the one or more feedback parameters represent bundled feedback parameters.

71. The method of claim 70, wherein the determining whether the one or more feedback parameters represent bundled feedback parameters includes determining that a single feedback parameter is received over one of a plurality of feedback resources related to the plurality of downlink resource grants.

72. The method of claim 69, wherein the receiving the one or more feedback parameters includes receiving the one or more feedback parameters as a plurality of bits indicated by cyclic shift or orthogonal sequence modifications to related uplink communications from the device.

73. The method of claim 69, further comprising retransmitting at least one of the plurality of downlink resource grants to the device wherein at least one of the one or more feedback parameters indicates non-acknowledgement.

74. The method of claim 68, wherein the indicating the sequence number of the at least one of the plurality of downlink resource grants includes indicating the sequence number with respect to a sequence of the at least one of the plurality of downlink resource grants in the plurality of downlink resource grants across a plurality of carriers in a given subframe.

75. The method of claim 68, wherein the generating the plurality of downlink resource grants includes generating the plurality of downlink resource grants across a plurality of subframes.

76. The method of claim 75, wherein the indicating the sequence number of the at least one of the plurality of downlink resource grants includes indicating the sequence number with respect to a sequence of the at least one of the plurality of downlink resource grants in the plurality of downlink resource grants related to a carrier across the plurality of subframes.

77. The method of claim 75, wherein the indicating the sequence number of the at least one of the plurality of downlink resource grants includes indicating the sequence number with respect to a sequence of the at least one of the plurality of downlink resource grants in the plurality of downlink resource grants across a plurality of carriers and the plurality of subframes.

78. The method of claim 68, wherein the indicating the total number of the plurality of downlink resource grants includes computing the total number of the plurality of downlink resource grants related to a plurality of carriers in a given subframe, the total number of the plurality of downlink resource grants over a carrier corresponding to the at least one of the plurality of downlink resource grants across a plurality of subframes, or the total number of the plurality of downlink resource grants related to the plurality of carriers over the plurality of subframes.

79. A wireless communications apparatus, comprising:

at least one processor configured to;

create a plurality of downlink resource grants for a device to facilitate communicating therewith over a plurality of carriers;

specify a sequence number of at least one of the plurality of downlink resource grants or a total number of the plurality of downlink resource grants in a downlink assignment index of each of the plurality of downlink resource grants; and

communicate the plurality of downlink resource grants to the device; and

a memory coupled to the at least one processor.

80. The wireless communications apparatus of claim 79, wherein the at least one processor is further configured to receive one or more feedback parameters related to the plurality of downlink resource grants.

81. The wireless communications apparatus of claim 80, wherein the at least one processor is further configured to determine whether the one or more feedback parameters represent bundled feedback parameters.

82. The wireless communications apparatus of claim 81, wherein the at least one processor determines whether the one or more feedback parameters represent bundled feedback parameters based at least in part on resources over which the one or more feedback parameters are received.

83. The wireless communications apparatus of claim 79, wherein the at least one processor creates the plurality of downlink resource grants over the plurality of carriers across a plurality of subframes.

84. An apparatus, comprising:

means for generating a plurality of downlink resource grants for a device to facilitate communicating therewith;

means for indicating a sequence number of at least one of the plurality of downlink resource grants or a total number of the plurality of downlink resource grants in a downlink assignment index of each of the plurality of downlink resource grants; and

means for transmitting the plurality of downlink resource grants to the device.

85. The apparatus of claim 84, wherein the means for transmitting the plurality of downlink resource grants further receives one or more feedback parameters related to the plurality of downlink resource grants.

86. The apparatus of claim 85, further comprising means for determining whether the one or more feedback parameters represent bundled feedback parameters.

87. The apparatus of claim 84, wherein the means for generating generates the plurality of downlink resource grants over a plurality of carriers across a plurality of subframes.

88. A computer program product, comprising:

a computer-readable medium comprising;

code for causing at least one computer to create a plurality of downlink resource grants for a device to facilitate communicating therewith over a plurality of carriers;

code for causing the at least one computer to specify a sequence number of at least one of the plurality of downlink resource grants or a total number of the plurality of downlink resource grants in a downlink assignment index of each of the plurality of downlink resource grants; and

code for causing the at least one computer to communicate the plurality of downlink resource grants to the device.

89. The computer program product of claim 88, wherein the computer-readable medium further comprises code for causing the at least one computer to receive one or more feedback parameters related to the plurality of downlink resource grants.

90. The computer program product of claim 89, wherein the computer-readable medium further comprises code for causing the at least one computer to determine whether the one or more feedback parameters represent bundled feedback parameters.

91. The computer program product of claim 90, wherein the code for causing the at least one computer to determine whether the one or more feedback parameters represent bundled feedback parameters determines whether the one or more feedback parameters represent bundled feedback parameters based at least in part on resources over which the one or more feedback parameters are received.

92. The computer program product of claim 88, wherein the code for causing the at least one computer to create creates the plurality of downlink resource grants over the plurality of carriers across a plurality of subframes.

93. An apparatus, comprising:

a downlink grant creating component that generates a plurality of downlink resource grants for a device to facilitate communicating therewith;

a grant parameter specifying component that indicates a sequence number of at least one of the plurality of downlink resource grants or a total number of the plurality of downlink resource grants in a downlink assignment index of each of the plurality of downlink resource grants; and

a communicating component that transmits the plurality of downlink resource grants to the device.

94. The apparatus of claim 93, wherein the communicating component receives one or more feedback parameters related to the plurality of downlink resource grants.

95. The apparatus of claim 94, further comprising a hybrid automatic repeat/request (HARQ) bundling determining component that detects whether the one or more feedback parameters represent bundled feedback parameters.

96. The apparatus of claim 95, wherein the HARQ bundling determining component detects whether the one or more feedback parameters represent bundled feedback parameters based at least in part on determining that a single feedback parameter is received over one of a plurality of feedback resources related to the plurality of downlink resource grants.

97. The apparatus of claim 93, wherein the downlink grant creating component generates the plurality of downlink resource grants over a plurality of carriers across a plurality of subframes.