HARQ Frame Data Structure and Method of Transmitting and Receiving with HARQ in Systems Using Blind Detection

• US 20150236823A1
• Filed: 02/18/2014
• Published: 08/20/2015
• Est. Priority Date: 02/18/2014
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Djukic, Petar, Nikopour, Hosein
• Granted Patent: US 9,369,241 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/008 where the control data relates to payload of a different packet
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A HARQ frame data structure and methods of transmitting and receiving with HARQ in systems using blind detection. In one embodiment, a method of transmitting over a channel using HARQ includes transmitting a first frame containing data toward a blind detection receiver, and transmitting a second frame containing at least a portion of the data and information about the first frame toward the blind detection receiver.

Claims

1. A method of transmitting over a channel using hybrid automatic repeat request (HARQ), comprising:

transmitting a first frame containing data to a receiver using a blind detection protocol; and

transmitting a second frame containing at least a portion of the data and information about the first frame toward the receiver using the blind detection protocol.

2. The method of claim 1 wherein the information about the first frame includes a resource unit (RU) used in the transmitting of the first frame.

3. The method of claim 2 wherein the RU includes time and frequency resource information of the transmitting the first frame.

4. The method of claim 1 wherein the second frame includes:

a data field containing the portion of the data; and

a header field containing the information about the first frame.

5. The method of claim 4 wherein the second frame includes a cyclic redundancy check (CRC) for the data field.

6. The method of claim 4 wherein the transmitting the second frame includes:

applying a first modulation and coding to the data field; and

applying a second modulation and coding to the header field, wherein the first modulation and coding is different from the second modulation and coding.

7. The method of claim 4 wherein the transmitting the first frame includes applying a first modulation and coding to a first data field, in the first frame, containing the data, and the transmitting the second frame includes applying a second modulation and coding to the header field of the second frame, wherein the first modulation and coding is different from the second modulation and coding.

8. The method of claim 1 wherein the first frame lacks a header.

9. The method of claim 1 wherein the second frame includes a cyclic redundancy check (CRC) for the information about the first frame.

10. A method of receiving over a channel using hybrid automatic repeat request (HARQ), comprising:

detecting and attempting to decode a first frame containing data using blind detection;

detecting a second frame containing at least a portion of the data and information about the first frame using blind detection;

decoding and employing the information about the first frame in associating and combining the first frame and the portion of the data into a combined frame; and

decoding the combined frame.

11. The method of claim 10 further comprising determining a resource unit (RU) of the channel used for the first frame, wherein the information about the first frame includes the RU.

12. The method of claim 11 further comprising storing the first frame according to the RU when the attempting to decode fails.

13. The method of claim 11 wherein the information about the first frame includes a sequence number for the frame.

14. The method of claim 10 further comprising determining an origin user equipment (UE) for the first frame.

15. The method of claim 10 further comprising acknowledging receipt of the data after the decoding the combined frame.

16. The method of claim 10 further comprising attempting to decode the combined frame for all possible origin user equipment (UEs) of the first frame and the second frame when the decoding and employing the information about the first frame fails.

17. A network interface controller (NIC), comprising:

a memory configured to store a hybrid automatic repeat request (HARQ) frame data structure, including;

a data field for encoded data bits, and

a header field for information about a first frame; and

a processor coupled to the memory and a transmitter and configured to;

compute a cyclic redundancy check (CRC) for the data field and cause the transmitter to transmit the first frame containing the data field and the CRC, and

populate the header field, compute at least one CRC for the data field and the header field, and cause the transmitter to transmit a second frame containing the data field, the header field, and the at least one CRC.

18. The NIC of claim 17 wherein the first frame further contains the header field.

19. The NIC of claim 17 wherein the at least one CRC includes only one CRC computed for the data field and the header field.

20. The NIC of claim 17 wherein the data field of the second frame contains at least a portion of the encoded data bits contained in the data field of the first frame.

21. The NIC of claim 17 wherein the information about the first frame includes a sequence number of the first frame.

22. The NIC of claim 17 wherein the information about the first frame includes a resource unit (RU) utilized for the first frame.

23. The NIC of claim 17 wherein the HARQ frame data structure further includes a pilot field and the processor is further configured to populate the pilot field with a pilot sequence and include the pilot field in the first frame.

24. The NIC of claim 23 wherein the information about the first frame includes an identifier of the pilot sequence included in the first frame.

25. A network interface controller (NIC), comprising:

a blind detection receiver configured to receive a first frame and a second frame, wherein the first frame includes a data field and the second frame includes a header and at least a portion of the data field;

a decoder configured to;

attempt to decode the first frame, and

decode the header of the second frame, wherein the header includes information about the first frame; and

a processor configured to employ the information about the first frame to associate the first frame and the second frame and combine the portion of the data field and the first frame into a combined frame.

26. The NIC of claim 25 wherein the decoder is further configured to decode the combined frame.

27. The NIC of claim 25 wherein the information about the first frame includes a sequence number of the first frame.

28. The NIC of claim 25 wherein the first frame includes a cyclic redundancy check (CRC) for the data field.

29. The NIC of claim 25 wherein the second frame includes a cyclic redundancy check (CRC) for the header.