System and method for terminal-group based HARQ for cellular integrated D2D communications

• US 9,479,292 B2
• Filed: 10/13/2015
• Issued: 10/25/2016
• Est. Priority Date: 12/18/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Maaref, Amine, Baligh, Mohammadhadi, Ma, Jianglei
• Primary Examiner(s): LAMARRE, GUY J
• Application Number:
  US14/881,651
• Publication Number:
  US 20160036565A1
• Time in Patent Office: 378 Days
• Field of Search: 714748-751, 714/776, 714/746, 714/749, 714/755, 714/786
• US Class Current: 1/1
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• CPC Class Codes: H03M 13/2906 using block codes H03M13/2957 takes precedence
• CPC Class Codes: H04L 1/0076 Distributed coding, e.g. network coding, involving channel coding coding in both space and time H04L1/0618; cooperative diversity H04B7/022
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

System and method embodiments are provided to support network communications with groups of UEs. The embodiments include a two-level group-based hybrid-automatic repeat request (HARQ) mechanism and acknowledgement (ACK)/negative ACK (NACK) feedback. An embodiment method includes receiving, at a UE within a virtual multi-point (ViMP) comprising UEs, a data packet for a target UE (TUE) that is broadcasted from a base station (BS) to the ViMP node, decode the data packet, and upon successfully decoding the data packet, broadcasting the data packet to the UEs within the ViMP node until a timer pre-established by the BS expires or an ACK message is received from the TUE or the ViMP node. In an embodiment, broadcasted data received in the ViMP node is re-broadcasted upon receiving a negative acknowledgment (NACK) message from the TUE, a beacon UE, or any of the UEs within the ViMP node.

Claims

1. A method for supporting two-level terminal-group based hybrid-automatic repeat request (HARQ) signaling, the method comprising:

receiving, at a cooperating user equipment (CUE) within a virtual multi-point (ViMP) node comprising a plurality of UEs, a data packet for a target UE (TUE), within the ViMP node, that is broadcasted from a base station (BS) to the ViMP node;

successfully decoding the data packet;

in an absence of an acknowledgement (ACK) message or a negative ACK (NACK) message from the TUE, broadcasting, by the CUE, the data packet within the ViMP node; and

subsequent to the broadcasting, and in an absence of the NACK message from the TUE, rebroadcasting, by the CUE, the data packet within the ViMP node until either the CUE receives a subsequent broadcast of the data packet from the BS, or the CUE receives the ACK message from the TUE or the ViMP node.

2. The method of claim 1 further comprising:

receiving the broadcasted data packet from one or more UEs in the ViMP node.

3. The method of claim 2, wherein the data packet is rebroadcasted within the ViMP node until the CUE receives the subsequent broadcast of the data packet from the BS.

4. The method of claim 2, wherein the data packet is re-broadcasted until the ACK message is received from the TUE, a beacon UE, or any of the UEs in the ViMP node.

5. The method of claim 1 further comprising receiving the subsequent broadcast of the data packet from the BS in response to a timer pre-established by the BS expiring.

6. The method of claim 1, wherein the data packet is rebroadcasted within the ViMP node without using scheduling within the ViMP node and without synchronization with the BS.

7. The method of claim 1, wherein the data packet rebroadcasted to the UEs in the ViMP node comprises a network coded version of the same received and decoded data packet, additional coded symbols in case of a concatenated low-density parity check (LDPC) coding, or a given redundancy version in case of turbo coding.

8. The method of claim 7, wherein the network coded version comprises a linear combination of successfully decoded packets, and wherein the decoded packets are combined using coefficients that are sent to the TUE with information on which packets were network coded.

9. The method of claim 7, wherein the network coded version comprises a linear combination of successfully decoded packets, and wherein the decoded packets are combined using coefficients that are known beforehand by the TUE.

10. The method of claim 1 further comprising:

receiving, from the BS, data packets with different HARQ redundancy versions, low-density parity check (LDPC) codewords, or both for different TUEs, wherein the different HARQ redundancy versions and LDPC codewords are mapped to orthogonal signatures; and

rebroadcasting the data packets to the UEs in the ViMP node.

11. A method for supporting two-level terminal-group based hybrid-automatic repeat request (HARQ) signaling, the method comprising:

receiving, at a cooperating user equipment (CUE) within a virtual multi-point (ViMP) node comprising a plurality of UEs, a data packet for a target UE (TUE), within the ViMP node, that is broadcasted from a base station (BS) to the ViMP node;

successfully decoding the data packet;

in an absence of an acknowledgement (ACK) message or a negative ACK (NACK) message from the TUE, broadcasting, by the CUE, the data packet within the ViMP node;

subsequent to the broadcasting, receiving, by the CUE, the NACK message from the TUE;

rebroadcasting, by the CUE, the data packet within the ViMP node in response to receiving the NACK message; and

subsequent to the rebroadcasting, receiving either a subsequent broadcast of the data packet from the BS or the ACK message from the TUE.

12. The method of claim 11 further comprising:

receiving the broadcasted data packet from one or more UEs in the ViMP node.

13. The method of claim 12, wherein the data packet is rebroadcasted within the ViMP node until the CUE receives the subsequent broadcast of the data packet from the BS.

14. The method of claim 12, wherein the data packet is rebroadcasted until the ACK message is received from the TUE.

15. The method of claim 11 further comprising receiving the subsequent broadcast of the data packet from the BS in response to a timer pre-established by the BS expiring.

16. The method of claim 11, wherein the data packet is rebroadcasted within the ViMP node without using scheduling within the ViMP node and without synchronization with the BS.

17. The method of claim 11, wherein the data packet rebroadcasted within the ViMP node comprises a network coded version of the same received and decoded data packet, additional coded symbols in case of a concatenated low-density parity check (LDPC) coding, or a given redundancy version in case of turbo coding.

18. The method of claim 17, wherein the network coded version comprises a linear combination of successfully decoded packets, and wherein the decoded packets are combined using coefficients that are sent to the TUE with information on which packets were network coded.

19. The method of claim 17, wherein the network coded version comprises a linear combination of successfully decoded packets, and wherein the decoded packets are combined using coefficients that are known beforehand by the TUE.

20. The method of claim 11 further comprising:

receiving, from the BS, data packets with different HARQ redundancy versions, low-density parity check (LDPC) codewords, or both for different TUEs, wherein the different HARQ redundancy versions and LDPC codewords are mapped to orthogonal signatures; and

rebroadcasting the data packets to the UEs in the ViMP node.