TRANSMISSION OF FEEDBACK INFORMATION FOR MULTI-CARRIER OPERATION

• US 20110110246A1
• Filed: 05/03/2010
• Published: 05/12/2011
• Est. Priority Date: 05/04/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Montojo, Juan, Zhang, Xiaoxia, Damnjanovic, Jelena M.
• Granted Patent: US 9,191,177 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0673 using feedback from receiving side
• CPC Class Codes: H04J 1/04 Frequency-transposition arrangements modulation with carrier or side-band suppression H03C1/52, H03C1/60; single-band suppression H04B1/00, H04B15/00; telegraphic communication H04L27/02, H04L25/49; transference of modulation from one carrier to another, e.g. frequency- changing H03D7/00; demodulation or transference of modulation of modulated electromagnetic waves H03D9/00
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/1635 Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/06 the signals being represented by different frequencies combined with time-division multiplexing H04L5/26

Abstract

Techniques for sending feedback information for multi-carrier operation are described. In an aspect, feedback information may be sent on an uplink carrier that may or may not be paired with a downlink carrier on which data transmission is sent. A user equipment (UE) may receive data transmission on a downlink carrier among a plurality of downlink carriers. The UE may determine feedback information for the data transmission, determine an uplink carrier to use to send the feedback information from among a plurality of uplink carriers, and send the feedback information on the uplink carrier. In another aspect, feedback information for multiple downlink carriers may be sent on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA). A UE may receive data transmissions on a plurality of downlink carriers, determine feedback information for the data transmissions, and send the feedback information on at least one uplink carrier using SC-FDMA.

Claims

1. A method for wireless communication, comprising:

receiving data transmission on a downlink carrier among a plurality of downlink carriers;

determining feedback information for the data transmission;

determining an uplink carrier to use to send the feedback information from among a plurality of uplink carriers; and

sending the feedback information on the uplink carrier.

2. The method of claim 1, wherein the feedback information comprises acknowledgement (ACK) information, or channel quality indicator (CQI) information, or both.

3. The method of claim 1, further comprising:

receiving a flag indicative of whether to use a designated uplink carrier or a paired uplink carrier to send the feedback information, wherein the paired uplink carrier is associated with the downlink carrier used for the data transmission or a downlink carrier used to send a downlink grant, and wherein the uplink carrier to use to send the feedback information is determined based on the flag.

4. The method of claim 1, further comprising:

receiving signaling identifying the uplink carrier to use to send the feedback information.

5. The method of claim 1, further comprising:

receiving a downlink grant on a second downlink carrier among the plurality of downlink carriers, wherein the downlink grant is for the data transmission on the downlink carrier, and wherein the uplink carrier to use to send the feedback information is paired with the second downlink carrier used to send the downlink grant.

6. The method of claim 1, wherein the uplink carrier is used to send feedback information for the plurality of downlink carriers.

7. The method of claim 1, further comprising:

receiving a second data transmission on a second downlink carrier among the plurality of downlink carriers; and

sending feedback information for the second data transmission on the uplink carrier.

8. An apparatus for wireless communication, comprising:

means for receiving data transmission on a downlink carrier among a plurality of downlink carriers;

means for determining feedback information for the data transmission;

means for determining an uplink carrier to use to send the feedback information from among a plurality of uplink carriers; and

means for sending the feedback information on the uplink carrier.

9. The apparatus of claim 8, further comprising:

means for receiving a flag indicative of whether to use a designated uplink carrier or a paired uplink carrier to send the feedback information, wherein the paired uplink carrier is associated with the downlink carrier used for the data transmission or a downlink carrier used to send a downlink grant, and wherein the uplink carrier to use to send the feedback information is determined based on the flag.

10. The apparatus of claim 8, further comprising:

means for receiving signaling identifying the uplink carrier to use to send the feedback information.

11. The apparatus of claim 8, further comprising:

means for receiving a downlink grant on a second downlink carrier among the plurality of downlink carriers, wherein the downlink grant is for the data transmission on the downlink carrier, and wherein the uplink carrier to use to send the feedback information is paired with the second downlink carrier used to send the downlink grant.

12. An apparatus for wireless communication, comprising:

at least one processor configured to receive data transmission on a downlink carrier among a plurality of downlink carriers, to determine feedback information for the data transmission, to determine an uplink carrier to use to send the feedback information from among a plurality of uplink carriers, and to send the feedback information on the uplink carrier.

13. The apparatus of claim 12, wherein the at least one processor is configured to receive a flag indicative of whether to use a designated uplink carrier or a paired uplink carrier to send the feedback information, and to determine the uplink carrier to use to send the feedback information based on the flag, wherein the paired uplink carrier is associated with the downlink carrier used for the data transmission or a downlink carrier used to send a downlink grant.

14. The apparatus of claim 12, wherein the at least one processor is configured to receive signaling identifying the uplink carrier to use to send the feedback information.

15. The apparatus of claim 12, wherein the at least one processor is configured to receive a downlink grant on a second downlink carrier among the plurality of downlink carriers, wherein the downlink grant is for the data transmission on the downlink carrier, and wherein the uplink carrier to use to send the feedback information is paired with the second downlink carrier used to send the downlink grant.

16. A computer program product, comprising:

a computer-readable medium comprising;

code for causing at least one computer to receive data transmission on a downlink carrier among a plurality of downlink carriers,

code for causing the at least one computer to determine feedback information for the data transmission,

code for causing the at least one computer to determine an uplink carrier to use to send the feedback information from among a plurality of uplink carriers, and

code for causing the at least one computer to send the feedback information on the uplink carrier.

17. A method for wireless communication, comprising:

sending data transmission on a downlink carrier among a plurality of downlink carriers to a user equipment (UE);

determining an uplink carrier used by the UE to send feedback information for the data transmission from among a plurality of uplink carriers; and

receiving the feedback information on the uplink carrier from the UE.

18. The method of claim 17, further comprising:

sending a flag indicative of whether to use a designated uplink carrier or a paired uplink carrier to send the feedback information, wherein the paired uplink carrier is associated with the downlink carrier used for the data transmission or a downlink carrier used to send a downlink grant, and wherein the uplink carrier used to send the feedback information is determined based on the flag.

19. The method of claim 17, further comprising:

sending signaling identifying the uplink carrier used to send the feedback information.

20. The method of claim 17, further comprising:

sending a downlink grant on a second downlink carrier among the plurality of downlink carriers, wherein the downlink grant is for the data transmission on the downlink carrier, and wherein the uplink carrier used to send the feedback information is paired with the second downlink carrier used to send the downlink grant.

21. The method of claim 17, further comprising:

sending a second data transmission on a second downlink carrier among the plurality of downlink carriers to the UE; and

receiving feedback information for the second data transmission on the uplink carrier from the UE.

22. An apparatus for wireless communication, comprising:

means for sending data transmission on a downlink carrier among a plurality of downlink carriers to a user equipment (UE);

means for determining an uplink carrier used by the UE to send feedback information for the data transmission from among a plurality of uplink carriers; and

means for receiving the feedback information on the uplink carrier from the UE.

23. The apparatus of claim 22, further comprising:

means for sending a flag indicative of whether to use a designated uplink carrier or a paired uplink carrier to send the feedback information, wherein the paired uplink carrier is associated with the downlink carrier used for the data transmission or a downlink carrier used to send a downlink grant, and wherein the uplink carrier used to send the feedback information is determined based on the flag.

24. The apparatus of claim 22, further comprising:

means for sending signaling identifying the uplink carrier used to send the feedback information.

25. The apparatus of claim 22, further comprising:

means for sending a downlink grant on a second downlink carrier among the plurality of downlink carriers, wherein the downlink grant is for the data transmission on the downlink carrier, and wherein the uplink carrier used to send the feedback information is paired with the second downlink carrier used to send the downlink grant.

26. A method for wireless communication, comprising:

receiving data transmissions on a plurality of downlink carriers;

determining feedback information for the data transmissions; and

sending the feedback information on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA).

27. The method of claim 26, wherein the feedback information comprises acknowledgement (ACK) information, or channel quality indicator (CQI) information, or both.

28. The method of claim 26, wherein the sending the feedback information comprises sending the feedback information in a plurality of frequency regions of the at least one uplink carrier, one frequency region for each downlink carrier.

29. The method of claim 28, further comprising:

receiving signaling identifying at least one frequency offset for the plurality of frequency regions.

30. The method of claim 26, wherein the sending the feedback information comprises sending the feedback information in a single frequency region of a single uplink carrier.

31. The method of claim 26, wherein the sending the feedback information comprises sending the feedback information on a plurality of resources for the at least one uplink carrier.

32. The method of claim 31, wherein the plurality of resources correspond to different frequency regions, or different orthogonal sequences, or different reference signal sequences, or a combination thereof

33. The method of claim 31, further comprising:

receiving signaling identifying the plurality of resources to use to send the feedback information, the signaling being dedicated signaling sent to a specific user equipment (UE) or broadcast signaling sent to all UEs.

34. The method of claim 26, wherein the determining the feedback information comprises

determining an acknowledgement (ACK) or a negative acknowledgement (NACK) for data transmission on each of the plurality of downlink carriers, and

determining a bundled ACK or NACK for the data transmissions on the plurality of downlink carriers based on the ACK or NACK for the data transmission on each of the plurality of downlink carriers.

35. The method of claim 26, further comprising:

generating a plurality of code bits based on the feedback information;

sending the plurality of code bits in a first slot of a subframe; and

sending the plurality of code bits in a second slot of the subframe.

36. The method of claim 26, further comprising:

generating a plurality of code bits based on the feedback information;

sending a first subset of the plurality of code bits in a first slot of a subframe; and

sending a second subset of the plurality of code bits in a second slot of the subframe.

37. An apparatus for wireless communication, comprising:

means for receiving data transmissions on a plurality of downlink carriers;

means for determining feedback information for the data transmissions; and

means for sending the feedback information on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA).

38. The apparatus of claim 37, wherein the means for sending the feedback information comprises means for sending the feedback information in a plurality of frequency regions of the at least one uplink carrier, one frequency region for each downlink carrier.

39. The apparatus of claim 37, wherein the means for sending the feedback information comprises means for sending the feedback information in a single frequency region of a single uplink carrier.

40. The apparatus of claim 37, wherein the means for sending the feedback information comprises means for sending the feedback information on a plurality of resources for the at least one uplink carrier, and wherein the plurality of resources correspond to different frequency regions, or different orthogonal sequences, or different reference signal sequences, or a combination thereof.

41. A method for wireless communication, comprising:

sending data transmissions on a plurality of downlink carriers to a user equipment (UE); and

receiving feedback information for the data transmissions on the plurality of downlink carriers from the UE, the feedback information being sent by the UE on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA).

42. The method of claim 41, wherein the receiving the feedback information comprises receiving the feedback information from a plurality of frequency regions of the at least one uplink carrier, one frequency region for each downlink carrier.

43. The method of claim 41, wherein the receiving the feedback information comprises receiving the feedback information from a single frequency region of a single uplink carrier.

44. The method of claim 41, wherein the receiving the feedback information comprises receiving the feedback information on a plurality of resources for the at least one uplink carrier, and wherein the plurality of resources correspond to different frequency regions, or different orthogonal sequences, or different reference signal sequences, or a combination thereof.

45. The method of claim 41, further comprising:

obtaining a bundled acknowledgement (ACK) or negative acknowledgement (NACK) from the feedback information;

resending the data transmissions on the plurality of downlink carriers if a bundle NACK is obtained; and

terminating the data transmissions if a bundle ACK is obtained.

46. The method of claim 41, further comprising:

performing decoding for the feedback information sent with repetition coding in two slots of a subframe.

47. The method of claim 41, further comprising:

performing decoding for the feedback information sent with joint coding across two slots of a subframe.

48. An apparatus for wireless communication, comprising:

means for sending data transmissions on a plurality of downlink carriers to a user equipment (UE); and

means for receiving feedback information for the data transmissions on the plurality of downlink carriers from the UE, the feedback information being sent by the UE on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA).

49. The apparatus of claim 48, wherein the means for receiving the feedback information comprises means for receiving the feedback information from a plurality of frequency regions of the at least one uplink carrier, one frequency region for each downlink carrier.

50. The apparatus of claim 48, wherein the means for receiving the feedback information comprises means for receiving the feedback information from a single frequency region of a single uplink carrier.

51. The apparatus of claim 48, wherein the means for receiving the feedback information comprises means for receiving the feedback information on a plurality of resources for the at least one uplink carrier, and wherein the plurality of resources correspond to different frequency regions, or different orthogonal sequences, or different reference signal sequences, or a combination thereof.