Code block cluster level harq

Patent metadata

Field	Value
Publication number	US-2016226643-A1
Application number	US-201514965458-A
Country	US
Kind code	A1
Filing date	Dec 10, 2015
Priority date	Feb 3, 2015
Publication date	Aug 4, 2016
Grant date	—

Abstract

Methods, systems, and devices are described for wireless communication. Wireless devices may exchange data using Medium Access Control (MAC) layer units known as transport blocks. The transport blocks may be partitioned into code block clusters (CBCs), each of which may include one or more code blocks. A receiving device may attempt to decode a transport block and send acknowledgement (ACK) and negative-acknowledgment (NACK) information to the transmitting device based on the whether each CBC was successfully decoded. The transmitting device may retransmit a redundancy version of a CBC for each NACK received. The transmitting device may group CBCs in segments of a transport block according to redundancy version. In some cases, the transmitting device may send a control message in a control channel which indicates the composition of the transport block.

First claim

What is claimed is:

1 . A method of communication at a wireless device, comprising:
identifying a redundancy version of a first code block cluster (CBC) for transmission during a transmission time interval (TTI); identifying a version of a second CBC for transmission during the TTI; and transmitting a transport block comprising the redundancy version of the first CBC and the version of the second CBC during the TTI.

2 . The method of claim 1 , wherein the version of the second CBC transmitted during the TTI comprises a redundancy version or a new version of the second CBC.

3 . The method of claim 1 , further comprising:
configuring the transport block based at least in part on a set of redundancy version segments, each redundancy version segment of the set comprising a subset of CBCs having a same redundancy version.

4 . The method of claim 3 , further comprising:
transmitting a control message for the TTI comprising an indication of which redundancy version segments are included in the transport block.

5 . The method of claim 4 , wherein the control message for the TTI comprises an indication of a redundancy version associated with each CBC included in the transport block.

6 . The method of claim 4 , wherein the control message further comprises an acknowledgement (ACK)/negative acknowledgement (NACK) failure indicator.

7 . The method of claim 6 , further comprising:
determining whether an ACK or a NACK was received for a transmitted CBC, wherein the ACK/NACK failure indicator is based at least in part on the determination whether the ACK or NACK was received.

8 . The method of claim 1 , further comprising:
storing a hybrid automatic repeat request (HARQ) state corresponding to a set of transmitted CBCs.

9 . The method of claim 8 , further comprising:
receiving an ACK/NACK response for the set of transmitted CBCs; and updating the HARQ state based at least in part on the ACK/NACK response.

10 . The method of claim 8 , further comprising:
determining that an ACK/NACK response has not been received for the set of transmitted CBCs; and refraining from updating the HARQ state based at least in part on the determination that the ACK/NACK response has not been received.

11 . A method of communication at a wireless device, comprising:
identifying a redundancy version of a first code block cluster (CBC) for reception during a transmission time interval (TTI); identifying a version of a second CBC for reception during the TTI; and receiving a transport block comprising the redundancy version of the first CBC and the version of the second CBC during the TTI.

12 . The method of claim 11 , wherein the version of the second CBC transmitted during the TTI comprises a redundancy version or a new version of the second CBC.

13 . The method of claim 11 , wherein the transport block is based at least in part on a set of redundancy version segments, each redundancy version segment of the set comprising one or more CBCs having a same redundancy version.

14 . The method of claim 13 , further comprising:
receiving a control message for the TTI comprising an indication of which redundancy version segments are included in the transport block.

15 . The method of claim 14 , wherein the control message further comprises an acknowledgement (ACK)/negative acknowledgement (NACK) failure indicator.

16 . The method of claim 11 , further comprising:
storing a hybrid automatic repeat request (HARQ) state corresponding to a set of received CBCs.

17 . The method of claim 16 , further comprising:
updating the HARQ state based at least in part on processing a cyclic redundancy check (CRC) associated with one or more of the set of received CBCs.

18 . An apparatus for communication at a wireless device, comprising:
a processor; memory in electronic communication with the processor; and instructions stored in the memory; wherein the instructions are executable by the processor to:
identify a redundancy version of a first code block cluster (CBC) for transmission during a transmission time interval (TTI);
identify a version of a second CBC for transmission during the TTI; and
transmit a transport block comprising the redundancy version of the first CBC and the version of the second CBC during the TTI.

19 . The apparatus of claim 18 , wherein the version of the second CBC transmitted during the TTI comprises a redundancy version or a new version of the second CBC.

20 . The apparatus of claim 18 , wherein the instructions are executable by the processor to:
configure the transport block based at least in part on a set of redundancy version segments, each redundancy version segment of the set comprising a subset of CBCs having a same redundancy version.

21 . The apparatus of claim 20 , wherein the instructions are executable by the processor to:
transmit a control message for the TTI comprising an indication of which redundancy version segments are included in the transport block.

22 . The apparatus of claim 21 , wherein the control message for the TTI comprises an indication of a redundancy version associated with each CBC included in the transport block.

23 . The apparatus of claim 21 , wherein the indication comprises four bits corresponding to a combination of redundancy version segments.

24 . The apparatus of claim 21 , wherein the control message further comprises an acknowledgement (ACK)/negative acknowledgement (NACK) failure indicator.

25 . The apparatus of claim 24 , wherein the instructions are executable by the processor to:
determine whether an ACK or a NACK was received for a transmitted CBC, wherein the ACK/NACK failure indicator is based at least in part on the determination whether the ACK or NACK was received.

26 . The apparatus of claim 18 , wherein the instructions are executable by the processor to:
store a hybrid automatic repeat request (HARQ) state corresponding to a set of transmitted CBCs.

27 . An apparatus for communication at a wireless device, comprising:
a processor; memory in electronic communication with the processor; and instructions stored in the memory; wherein the instructions are executable by the processor to:
identify a redundancy version of a first code block cluster (CBC) for reception during a transmission time interval (TTI);
identify a version of a second CBC for reception during the TTI; and
receive a transport block comprising the redundancy version of the first CBC and the version of the second CBC during the TTI.

28 . The apparatus of claim 27 , wherein the version of the second CBC transmitted during the TTI comprises a redundancy version or a new version of the second CBC.

29 . The apparatus of claim 27 , wherein the transport block is based at least in part on a set of redundancy version segments, each redundancy version segment of the set comprising one or more CBCs having a same redundancy version.

30 . The apparatus of claim 29 , wherein the instructions are executable by the processor to:
receive a control message for the TTI comprising an indication of which redundancy version segments are included in the transport block.

Assignees

• Qualcomm Inc

Inventors

• Mallik Siddhartha
• Yoo Taesang
• Damnjanovic Jelena

Classifications

• H04L1/1607

  Details of the supervisory signal · CPC title

• H04L1/0089 Primary

  in payload · CPC title

• H04L1/1896

  ARQ related signaling · CPC title

• H04L1/1819 Primary

  with retransmission of additional or different redundancy · CPC title

• H04L1/1822

  involving configuration of automatic repeat request [ARQ] with parallel processes · CPC title