Cyclic redundancy check for uplink control information on control and data channels

Patent metadata

Field	Value
Publication number	US-2016353430-A1
Application number	US-201615164386-A
Country	US
Kind code	A1
Filing date	May 25, 2016
Priority date	May 27, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

Methods, systems, and devices are described for wireless communication. One method includes identifying uplink control information (UCI) for a component carrier (CC) of a carrier aggregation (CA) configuration which may include a primary cell (PCell) and, in some aspects, a physical uplink control channel (PUCCH) enabled secondary cell (SCell); determining to include cyclic redundancy check (CRC) information for the UCI based at least in part on a UCI characteristic or an uplink control channel format; and transmitting an uplink channel comprising the UCI and the CRC information.

First claim

What is claimed is:

1 . A method of wireless communication, comprising:
identifying uplink control information (UCI) for a component carrier (CC) of a carrier aggregation (CA) configuration; determining to include cyclic redundancy check (CRC) information for the UCI based at least in part on a UCI characteristic or an uplink control channel format; and transmitting an uplink channel comprising the UCI and the CRC information.

2 . The method of claim 1 , wherein the CA configuration further comprises a primary cell (PCell) and a physical uplink control channel (PUCCH) enabled secondary cell (SCell).

3 . The method of claim 2 , wherein determining to include CRC information is performed separately for at least a first group and a second group, wherein the first group comprises the PCell and the second group comprises the PUCCH enabled SCell.

4 . The method of claim 1 , further comprising:
determining that the CC comprises frequency resources of unlicensed spectrum, wherein the determination to include CRC information for the UCI is based at least in part on the determination that the carrier comprises the frequency resources of the unlicensed spectrum.

5 . The method of claim 1 , wherein the UCI characteristic comprises a payload size of the UCI.

6 . The method of claim 5 , further comprising:
identifying a payload size of the UCI, wherein the determination to include the CRC information is based at least in part on the payload size exceeding a threshold.

7 . The method of claim 6 , wherein the threshold is based at least in part on whether the uplink channel comprises a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

8 . The method of claim 6 , wherein the payload size of the UCI is identified based at least in part on at least one of a radio resource control (RRC) configuration, dynamic signaling, or a number of transport blocks, or any combination thereof.

9 . The method of claim 5 , further comprising:
selecting a coding scheme for the payload of the UCI, wherein the determination to include the CRC information is associated with the coding scheme.

10 . The method of claim 5 , wherein identifying UCI for the CC of the CA configuration comprises:
identifying UCI for a plurality of CCs of the CA configuration, wherein the determination to include CRC information is based at least in part on quantity in the plurality.

11 . The method of claim 1 , wherein the UCI characteristic comprises a UCI type.

12 . The method of claim 1 , wherein the UCI comprises a plurality of UCI types; and wherein the determination to include CRC information comprises:
determining whether to include CRC information separately for one or more UCI types of the plurality.

13 . The method of claim 12 , wherein the plurality of UCI types comprises at least one of an acknowledgement (ACK), a negative ACK (NAK), a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), a procedure transaction identifier (PTI), a scheduling request (SR), or any combination thereof.

14 . The method of claim 1 , wherein the CRC information comprises a number bits that is based at least in part on a UCI type.

15 . The method of claim 1 , wherein the uplink channel comprises a physical uplink control channel (PUCCH) on a PCell.

16 . The method of claim 1 , wherein the uplink channel comprises a physical uplink control channel (PUCCH) on a PUCCH enabled SCell.

17 . The method of claim 1 , wherein the uplink channel comprises a physical uplink shared channel (PUSCH).

18 . The method of claim 1 , wherein the CA configuration comprises more than five component carriers (CCs).

19 . An apparatus for wireless communication, comprising:
means for identifying uplink control information (UCI) for a component carrier (CC) of a carrier aggregation (CA) configuration; means for determining to include cyclic redundancy check (CRC) information for the UCI based at least in part on a UCI characteristic or an uplink control channel format; and means for transmitting an uplink channel comprising the UCI and the CRC information.

20 . The apparatus of claim 19 , further comprising:
means for determining that the CC comprises frequency resources of unlicensed spectrum, wherein the means for determining to include CRC information for the UCI is operable based at least in part on the determination that the carrier comprises the frequency resources of the unlicensed spectrum.

21 . The apparatus of claim 19 , wherein the UCI comprises a plurality of UCI types, and wherein the means for determining to include CRC information comprises:
means for means determining whether to include CRC information separately for one or more UCI types of the plurality.

22 . An apparatus for wireless communication, comprising:
a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
identify uplink control information (UCI) for a component carrier (CC) of a carrier aggregation (CA) configuration;
determine to include cyclic redundancy check (CRC) information for the UCI based at least in part on a UCI characteristic or an uplink control channel format; and
transmit an uplink channel comprising the UCI and the CRC information.

23 . The apparatus of claim 22 , wherein the CA configuration further comprises a primary cell (PCell) and a physical uplink control channel (PUCCH) enabled secondary cell (SCell).

24 . The apparatus of claim 22 , wherein the instructions are operable to cause the processor to:
determine that the CC comprises frequency resources of unlicensed spectrum, wherein the determination to include CRC information for the UCI is based at least in part on the determination that the carrier comprises the frequency resources of the unlicensed spectrum.

25 . The apparatus of claim 22 , wherein the UCI characteristic comprises a payload size of the UCI.

26 . The apparatus of claim 25 , wherein the instructions are operable to cause the processor to:
identify a payload size of the UCI, wherein the determination to include the CRC information is based at least in part on the payload size exceeding a threshold.

27 . The apparatus of claim 25 , wherein the instructions are operable to cause the processor to:
select a coding scheme for the payload of the UCI, wherein the determination to include the CRC information is associated with the coding scheme.

28 . The apparatus of claim 25 , wherein the instructions are operable to cause the processor to:
identify UCI for a plurality of CCs of the CA configuration, wherein the determination to include CRC information is based at least in part on quantity in the plurality.

29 . The apparatus of claim 22 , wherein the UCI comprises a plurality of UCI types, and wherein the instructions are operable to cause the processor to:
determine whether to include CRC information separately for one or more UCI types of the plurality.

30 . A computer program product comprising a non-transitory computer-readable medium, the non-transitory computer-readable medium comprising:
instructions to identify uplink control information (UCI) for a component carrier (CC) of a carrier aggregation (CA) con

Assignees

• Qualcomm Inc

Inventors

• Chen Wanshi
• Gaal Peter

Classifications

• H04W72/21 Primary

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04Q2213/13215

  Code checking, CRC · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title