Method and system for supporting multiple hybrid automatic repeat request processes per transmission time interval

• US 9,893,844 B2
• Filed: 02/08/2016
• Issued: 02/13/2018
• Est. Priority Date: 02/03/2006
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Terry, Stephen E., Olesen, Robert L., Wang, Jin, Chandra, Arty
• Primary Examiner(s): LAMARRE, GUY J
• Application Number:
  US15/018,227
• Publication Number:
  US 20160156436A1
• Time in Patent Office: 736 Days
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method and apparatus may be used for supporting multiple hybrid automatic repeat request (H-ARQ) processes per transmission time interval (TTI). A transmitter and a receiver may include a plurality of H-ARQ processes. Each H-ARQ process may transmit and receive one TB per TTI. The transmitter may generate a plurality of TBs and assign each TB to a H-ARQ process. The transmitter may send control information for each TB, which may include H-ARQ information associated TBs with the TBs. The transmitter may send the TBs using the associated H-ARQ processes simultaneously per TTI. After receiving the TBs, the receiver may send feedback for each of the H-ARQ processes and associated TBs indicating successful or unsuccessful receipt of each of the TBs to the transmitter. The feedback for multiple TBs may be combined for the simultaneously transmitted H-ARQ processes, (i.e., TBs).

Claims

1. A wireless transmit/receive unit (WTRU) for receiving multiple transport blocks (TB)s, the WTRU comprising:

a receiver configured to, in one transmission time interval (TTI), receive control information for each of a plurality of TBs, and to utilize the control information to receive the plurality of TBs;

a processor configured to process the plurality of TBs, to generate a feedback message that includes a channel quality indicator (CQI) and indicates successful or unsuccessful receipt of each of the plurality of TBs, and based on the amount of feedback, to select a coding scheme for the feedback message; and

a transmitter configured to transmit the generated feedback message.

2. The WTRU of claim 1, wherein the receiver is further configured to receive a separate cyclic redundancy check (CRC) for each of the plurality of TBs.

3. The WTRU of claim 1, wherein the feedback message includes a channel quality indicator (CQI) for each of a plurality of multiple-input multiple-output (MIMO) streams.

4. The WTRU of claim 1, wherein the control information includes, for each TB of the plurality of TBs, a modulation and coding scheme (MCS) and Hybrid automatic repeat request (HARQ) information, wherein the HARQ information for each TB includes a redundancy version.

5. The WTRU of claim 1, wherein the control information includes an allocation for each TB of the plurality of TBs to a different spatial stream.

6. The WTRU of claim 1, wherein feedback for each TB of the plurality of TBs is concatenated in feedback message.

7. The WTRU of claim 1, wherein a more robust coding scheme is selected as the number of feedback increases.

8. The WTRU of claim 1, wherein the amount of feedback is based on the number of ACK/NACKs in the feedback message.

9. A Node-B configured to transmit multiple transport blocks (TB)s, the Node-B comprising:

a transmitter and processor configured to, in one transmission time interval (TTI), transmit control information for each of a plurality of TBs, and to utilize the control information to transmit the plurality of TBs; and

a receiver and processor configured to receive and decode a feedback message that includes a channel quality indicator (CQI) and indicates successful or unsuccessful receipt of each of the plurality of TBs at a wireless transmit/receive unit (WTRU), wherein the feedback message is received and decoded based on a modulation and coding scheme that is associated with the amount of feedback.

10. The Node-B of claim 9, wherein the transmitter and processor is further configured to transmit a separate cyclic redundancy check (CRC) for each of the plurality of TBs.

11. The Node-B of claim 9, wherein the feedback message includes a channel quality indicator (CQI) for each of a plurality of multiple-input multiple-output (MIMO) streams.

12. The Node-B of claim 9, wherein the control information includes, for each TB of the plurality of TBs, a modulation and coding scheme (MCS) and Hybrid automatic repeat request (HARQ) information, wherein the HARQ information for each TB includes a redundancy version.

13. The Node-B of claim 9, wherein the control information includes an allocation for each TB of the plurality of TBs to a different spatial stream.

14. The Node-B of claim 9, wherein feedback for each TB of the plurality of TBs is concatenated in feedback message.

15. The Node-B of claim 9, wherein a more robust modulation and coding scheme is selected at the WTRU as the number of feedback increases.

16. The Node-B of claim 9, wherein the amount of feedback is based on the number of ACK/NACKs in the feedback message.

17. A method performed by wireless transmit/receive unit (WTRU) for receiving multiple transport blocks (TB)s, the method comprising:

receiving a control information for each of a plurality of TBs in a transmission time interval (TTI);

utilizing the control information to receive the plurality of TBs the TTI;

generating a feedback message that includes a channel quality indicator (CQI) and indicates successful or unsuccessful receipt of each of the plurality of TBs;

based on the amount of feedback, selecting a coding scheme for the feedback message; and

transmitting the feedback message using the selected coding scheme.

18. The method of claim 17, further comprising:

receiving a separate cyclic redundancy check (CRC) for each of the plurality of TBs.

19. The method of claim 17, wherein the feedback message includes a channel quality indicator (CQI) for each of a plurality of multiple-input multiple-output (MIMO) streams.

20. The method of claim 17, wherein the control information includes, for each TB of the plurality of TBs, a modulation and coding scheme (MCS) and Hybrid automatic repeat request (HARQ) information, wherein the HARQ information for each TB includes a redundancy version.

21. The method of claim 17, wherein the control information includes an allocation for each TB of the plurality of TBs, to a different spatial stream.

22. The method of claim 17, wherein feedback for each TB of the plurality of TBs is concatenated in feedback message.

23. The method of claim 17, wherein a more robust coding scheme is selected as the number of feedback increases.

24. The method of claim 17, wherein the amount of feedback is based on the number of ACK/NACKs in the feedback message.