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3GPP TS 38.212 V1.2.1 (2017-

12)

Technical Specification

3rd Generation Partnership Project;

Technical Specification Group Radio Access Network;

NR;

Multiplexing and channel coding

(Release 15)

The present document has been developed within the 3rd Generation Partnership Project (3GPP

) and may be further elaborated for the purposes of 3GPP..

The present document has not been subject to any approval process by the 3GPP

Organizational Partners and shall not be implemented.

This Specification is provided for future development work within 3GPP

only. The Organizational Partners accept no liability for any use of this

Specification.

Specifications and Reports for implementation of the 3GPP

system should be obtained via the 3GPP Organizational Partners' Publications Offices.

Contents
Contents....................................................................................................................................................3
Foreword...................................................................................................................................................6
Scope......................................................................................................................................................7
References..............................................................................................................................................7
Definitions, symbols and abbreviations..................................................................................................7
1 Definitions..............................................................................................................................................................7
2 Symbols..................................................................................................................................................................7
3 Abbreviations.........................................................................................................................................................7
Mapping to physical channels................................................................................................................8
1 Uplink.....................................................................................................................................................................8
2 Downlink................................................................................................................................................................8
General procedures................................................................................................................................8
1 CRC calculation.....................................................................................................................................................8
2 Code block segmentation and code block CRC attachment..................................................................................9
2.1 Polar coding........................................................................................................................................................9
2.2 Low density parity check coding......................................................................................................................10
3 Channel coding.....................................................................................................................................................12
3.1 Polar coding......................................................................................................................................................12
3.1.1 Interleaving....................................................................................................................................................12
3.1.2 Polar encoding................................................................................................................................................13
3.2 Low density parity check coding......................................................................................................................18
3.3 Channel coding of small block lengths.............................................................................................................25
3.3.1 Encoding of 1-bit information........................................................................................................................25
3.3.2 Encoding of 2-bit information........................................................................................................................25
3.3.3 Encoding of other small block lengths...........................................................................................................26
4 Rate matching.......................................................................................................................................................26
4.1 Rate matching for Polar code............................................................................................................................26
4.1.1 Sub-block interleaving...................................................................................................................................26
4.1.2 Bit selection....................................................................................................................................................28
4.1.3 Interleaving of coded bits...............................................................................................................................28
4.2 Rate matching for LDPC code..........................................................................................................................29
4.2.1 Bit selection....................................................................................................................................................29
4.2.2 Bit interleaving...............................................................................................................................................31
4.3 Rate matching for channel coding of small block lengths................................................................................32
5 Code block concatenation....................................................................................................................................32
Uplink transport channels and control information..............................................................................33
1 Random access channel........................................................................................................................................33
2 Uplink shared channel..........................................................................................................................................33
2.1 Transport block CRC attachment......................................................................................................................33
2.2 LDPC base graph selection...............................................................................................................................33
2.3 Code block segmentation and code block CRC attachment.............................................................................33
2.4 Channel coding of UL-SCH..............................................................................................................................33
2.5 Rate matching....................................................................................................................................................34
2.6 Code block concatenation.................................................................................................................................34
2.7 Data and control multiplexing...........................................................................................................................34
3 Uplink control information..................................................................................................................................41
3.1 Uplink control information on PUCCH............................................................................................................41
3.1.1 UCI bit sequence generation..........................................................................................................................41
3.1.1.1 HARQ-ACK/SR only..................................................................................................................................41
3.1.1.2 CSI only 42
3.1.1.3 HARQ-ACK/SR and CSI............................................................................................................................47
3.1.2 Code block segmentation and CRC attachment.............................................................................................48
3GPP
3GPP TS 38.212 V1.2.1 (2017-12)
3Release 15

3.1.2.1 UCI encoded by Polar code.........................................................................................................................48
3.1.2.2 UCI encoded by channel coding of small block lengths.............................................................................48
3.1.3 Channel coding of UCI..................................................................................................................................49
3.1.3.1 UCI encoded by Polar code.........................................................................................................................49
3.1.3.2 UCI encoded by channel coding of small block lengths.............................................................................49
3.1.4 Rate matching.................................................................................................................................................49
3.1.4.1 UCI encoded by Polar code.........................................................................................................................49
3.1.4.2 UCI encoded by channel coding of small block lengths.............................................................................50
3.1.5 Code block concatenation..............................................................................................................................51
3.1.6 Multiplexing of coded UCI bits to PUCCH...................................................................................................51
3.2 Uplink control information on PUSCH.............................................................................................................53
3.2.1 UCI bit sequence generation..........................................................................................................................53
3.2.1.1 HARQ-ACK................................................................................................................................................53
3.2.1.2 CSI 54
3.2.2 Code block segmentation and CRC attachment.............................................................................................56
3.2.2.1 UCI encoded by Polar code.........................................................................................................................56
3.2.2.2 UCI encoded by channel coding of small block lengths.............................................................................56
3.2.3 Channel coding of UCI..................................................................................................................................57
3.2.3.1 UCI encoded by Polar code.........................................................................................................................57
3.2.3.2 UCI encoded by channel coding of small block lengths.............................................................................57
3.2.4 Rate matching.................................................................................................................................................57
3.2.4.1 UCI encoded by Polar code.........................................................................................................................57
3.2.4.1.1 HARQ-ACK 57
3.2.4.1.2 CSI part 1 58
3.2.4.1.3 CSI part 2 60
3.2.4.2 UCI encoded by channel coding of small block lengths.............................................................................61
3.2.4.2.1 HARQ-ACK 61
3.2.4.2.2 CSI part 1 61
3.2.4.2.3 CSI part 2 61
The output bit sequence after rate matching is denoted as .6.3.2.5 Code block concatenation.................................62
3.2.6 Multiplexing of coded UCI bits to PUSCH...................................................................................................62
Downlink transport channels and control information.........................................................................62
1 Broadcast channel................................................................................................................................................62
1.1 PBCH payload generation.................................................................................................................................62
1.2 Scrambling........................................................................................................................................................63
1.3 Transport block CRC attachment......................................................................................................................64
1.4 Channel coding..................................................................................................................................................64
1.5 Rate matching....................................................................................................................................................64
2 Downlink shared channel and paging channel.....................................................................................................65
2.1 Transport block CRC attachment......................................................................................................................65
2.2 LDPC base graph selection...............................................................................................................................65
2.3 Code block segmentation and code block CRC attachment.............................................................................65
2.4 Channel coding..................................................................................................................................................65
2.5 Rate matching....................................................................................................................................................66
2.6 Code block concatenation.................................................................................................................................66
3 Downlink control information..............................................................................................................................66
3.1 DCI formats.......................................................................................................................................................66
3.1.1 DCI formats for scheduling of PUSCH.........................................................................................................66
3.1.1.1 Format 0_066
3.1.1.2 Format 0_167
3.1.2 DCI formats for scheduling of PDSCH.........................................................................................................77
3.1.2.1 Format 1_077
3.1.2.2 Format 1_177
3.1.3 DCI formats for other purposes......................................................................................................................84
3.1.3.1 Format 2_084
3.1.3.2 Format 2_184
3.1.3.3 Format 2_284
3.1.3.3 Format 2_384
3.2 CRC attachment................................................................................................................................................85
3.3 Channel coding..................................................................................................................................................85
3.4 Rate matching....................................................................................................................................................85
3GPP
3GPP TS 38.212 V1.2.1 (2017-12)
4Release 15