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TECHNICAL SPECIFICATION
5G;
NR;
Physical layer procedures for control
(3GPP TS 38.213 version 15.2.0 Release 15)
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3GPP TS 38.213 version 15.2.0 Release 15 1 ETSI TS 138 213 V15.2.0 (2018-07)
Reference
DTS/TSGR-0138213vf20
Keywords
5G
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3GPP TS 38.213 version 15.2.0 Release 15 2 ETSI TS 138 213 V15.2.0 (2018-07)
Intellectual Property Rights
Essential patents
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pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 3 ETSI TS 138 213 V15.2.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 5
1 Scope . 6
2 References . 6
3 Definitions, symbols and abbreviations . 7
3.1 Definitions . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Synchronization procedures . 9
4.1 Cell search . 9
4.2 Transmission timing adjustments . 10
4.3 Timing for secondary cell activation / deactivation. 11
5 Radio link monitoring . 12
6 Link recovery procedures . 13
7 Uplink Power control . 14
7.1 Physical uplink shared channel . 14
7.1.1 UE behaviour . 14
7.2 Physical uplink control channel . 20
7.2.1 UE behaviour . 20
7.3 Sounding reference signals . 25
7.3.1 UE behaviour . 26
7.4 Physical random access channel . 28
7.5 Prioritizations for transmission power reductions . 28
7.6 Dual connectivity . 29
7.6.1 EN-DC . 29
7.7 Power headroom report . 30
7.7.1 Type 1 PH Report . 30
7.7.2 Type 2 PH report . 31
7.7.3 Type 3 PH Report . 31
8 Random access procedure . 32
8.1 Random access preamble . 32
8.2 Random access response . 34
8.3 Msg3 PUSCH . 35
8.4 PDSCH with UE contention resolution identity . 36
9 UE procedure for reporting control information . 36
9.1 HARQ-ACK codebook determination . 37
9.1.1 CBG-based HARQ-ACK codebook determination . 37
9.1.2 Type-1 HARQ-ACK codebook determination . 38
9.1.2.1 Type-1 HARQ-ACK codebook in physical uplink control channel . 38
9.1.2.2 Type-1 HARQ-ACK codebook in physical uplink shared channel. 42
9.1.3 Type-2 HARQ-ACK codebook determination . 42
9.1.3.1 Type-2 HARQ-ACK codebook in physical uplink control channel . 42
9.1.3.2 Type-2 HARQ-ACK codebook in physical uplink shared channel. 47
9.2 UCI reporting in physical uplink control channel . 48
9.2.1 PUCCH Resource Sets. 48
9.2.2 PUCCH Formats for UCI transmission . 51
9.2.3 UE procedure for reporting HARQ-ACK . 51
9.2.4 UE procedure for reporting SR . 54
9.2.5 UE procedure for reporting multiple UCI types . 54
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 4 ETSI TS 138 213 V15.2.0 (2018-07)
9.2.5.1 UE procedure for multiplexing HARQ-ACK or CSI and SR in a PUCCH . 57
9.2.5.2 UE procedure for multiplexing HARQ-ACK/SR and CSI in a PUCCH . 58
9.2.6 UCI repetition procedure . 61
9.3 UCI reporting in physical uplink shared channel . 62
10 UE procedure for receiving control information . 66
10.1 UE procedure for determining physical downlink control channel assignment . 66
10.2 PDCCH validation for DL SPS and UL grant Type 2 . 73
11 UE-group common signalling . . 74
11.1 Slot configuration . 74
11.1.1 UE procedure for determining slot format . 77
11.2 Interrupted transmission indication . 83
11.3 Group TPC commands for PUCCH/PUSCH . 84
11.4 SRS switching . 85
12 Bandwidth part operation . 85
13 UE procedure for monitoring Type0-PDCCH common search space . 87
Annex A: Change history . 99
History . 100
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 5 ETSI TS 138 213 V15.2.0 (2018-07)
Foreword
This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 6 ETSI TS 138 213 V15.2.0 (2018-07)
1 Scope
The present document specifies and establishes the characteristics of the physical layer procedures for control
operations in 5G-NR.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications"
[2] 3GPP TS 38.201: "NR; Physical Layer – General Description"
[3] 3GPP TS 38.202: "NR; Services provided by the physical layer"
[4] 3GPP TS 38.211: "NR; Physical channels and modulation"
[5] 3GPP TS 38.212: "NR; Multiplexing and channel coding"
[6] 3GPP TS 38.214: "NR; Physical layer procedures for data"
[7] 3GPP TS 38.215: "NR; Physical layer measurements"
[8-1] 3GPP TS 38.101-1: "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1
Standalone"
[8-2] 3GPP TS 38.101-2: "NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2
Standalone"
[8-3] 3GPP TS 38.101-3: "NR; User Equipment (UE) radio transmission and reception; Part 3: Range 1
and Range 2 Interworking operation with other radios"
[9] 3GPP TS 38.104: "NR; Base Station (BS) radio transmission and reception"
[10] 3GPP TS 38.133: "NR; Requirements for support of radio resource management"
[11] 3GPP TS 38.321: "NR; Medium Access Control (MAC) protocol specification"
[12] 3GPP TS 38.331: "NR; Radio Resource Control (RRC); Protocol specification"
[13] 3GPP TS 36.213: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer
procedures"
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 7 ETSI TS 138 213 V15.2.0 (2018-07)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in [1, TR 21.905] and the following apply. A
term defined in the present document takes precedence over the definition of the same term, if any, in [1, TR 21.905].
3.2 Symbols
For the purposes of the present document, the following symbols apply:
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An
abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any,
in [1, TR 21.905].
BWP Bandwidth part
CB Code block
CBG Code block group
CCE Control channel element
CRC Cyclic redundancy check
CSI Channel state information
DAI Downlink assignment index
DC Dual connectivity
DCI Downlink control information
DL Downlink
DL-SCH Downlink shared channel
EPRE Energy per resource element
EN-DC E-UTRA NR dual connectivity with MCG using E-UTRA and SCG using NR
FR Frequency range
GSCN Global synchronization channel number
HARQ-ACK Hybrid automatic repeat request acknowledgement
MCG Master cell group
MCS Modulation and coding scheme
PBCH Physical broadcast channel
PCell Primary cell
PDCCH Physical downlink control channel
PDSCH Physical downlink shared channel
PRACH Physical random access channel
PRB Physical resource block
PRG Physical resource block group
PSCell Primary secondary cell
PSS Primary synchronization signal
PUCCH Physical uplink control channel
PUCCH-SCell PUCCH SCell
PUSCH Physical uplink shared channel
QCL Quasi-collocation
RB Resource block
RE Resource element
RRM Radio resource management
RS Reference signal
RSRP Reference signal received power
SCG Secondary cell group
SFN System frame number
SPS Semi-persistent scheduling
SR Scheduling request
SRI SRS resource indicator
SRS Sounding reference signal
SSS Secondary synchronization signal
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 8 ETSI TS 138 213 V15.2.0 (2018-07)
TA Timing advance
TAG Timing advance group
UCI Uplink control information
UE User equipment
UL Uplink
UL-SCH Uplink shared channel
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 9 ETSI TS 138 213 V15.2.0 (2018-07)
4 Synchronization procedures
4.1 Cell search
Cell search is the procedure by which a UE acquires time and frequency synchronization with a cell and detects the
physical layer Cell ID of that cell.
A UE receives the following synchronization signals (SS) in order to perform cell search: the primary synchronization
signal (PSS) and secondary synchronization signal (SSS) as defined in [4, TS 38.211].
A UE assumes that reception occasions of a physical broadcast channel (PBCH), PSS, and SSS are in consecutive
symbols, as defined in [4, TS 38.211], and form a SS/PBCH block. The UE assumes that SSS, PBCH DM-RS, and
PBCH data have the same EPRE. The UE may assume that the ratio of PSS EPRE to SSS EPRE in a SS/PBCH block in
a corresponding cell is either 0 dB or 3 dB. If the UE has not been provided dedicated higher layer parameters, the UE
may assume that the ratio of PDCCH DMRS EPRE to SSS EPRE is within -8 dB and 8 dB when the UE monitors
PDCCHs for a DCI format 1_0 with CRC scrambled by SI-RNTI, P-RNTI, or RA-RNTI.
For a half frame with SS/PBCH blocks, the first symbol indexes for candidate SS/PBCH blocks are determined
according to the subcarrier spacing of SS/PBCH blocks as follows, where index 0 corresponds to the first symbol of the
first slot in a half-frame.
- Case A - 15 kHz subcarrier spacing: the first symbols of the candidate SS/PBCH blocks have indexes of {2, 8} +
14*n. For carrier frequencies smaller than or equal to 3 GHz, n=0, 1. For carrier frequencies larger than 3 GHz
and smaller than or equal to 6 GHz, n=0, 1, 2, 3.
- Case B - 30 kHz subcarrier spacing: the first symbols of the candidate SS/PBCH blocks have indexes {4, 8, 16,
20} + 28*n. For carrier frequencies smaller than or equal to 3 GHz, n=0. For carrier frequencies larger than 3
GHz and smaller than or equal to 6 GHz, n=0, 1.
- Case C - 30 kHz subcarrier spacing: the first symbols of the candidate SS/PBCH blocks have indexes {2, 8} +
14*n. For carrier frequencies smaller than or equal to 3 GHz, n=0, 1. For carrier frequencies larger than 3 GHz
and smaller than or equal to 6 GHz, n=0, 1, 2, 3.
- Case D - 120 kHz subcarrier spacing: the first symbols of the candidate SS/PBCH blocks have indexes {4, 8, 16,
20} + 28*n. For carrier frequencies larger than 6 GHz, n=0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18.
- Case E - 240 kHz subcarrier spacing: the first symbols of the candidate SS/PBCH blocks have indexes {8, 12,
16, 20, 32, 36, 40, 44} + 56*n. For carrier frequencies larger than 6 GHz, n=0, 1, 2, 3, 5, 6, 7, 8.
From the above cases, the applicable ones for a cell depend on a respective frequency band, as provided in [8-1, TS
38.101-1] and [8-2, TS 38.101-2]. A same case applies for all SS/PBCH blocks on the cell.
The candidate SS/PBCH blocks in a half frame are indexed in an ascending order in time from 0 to L −1. A UE
determines the 2 LSB bits, for L = 4 , or the 3 LSB bits, for L > 4 , of a SS/PBCH block index per half frame from a
one-to-one mapping with an index of the DM-RS sequence transmitted in the PBCH. For L = 64 , the UE determines
the 3 MSB bits of the SS/PBCH block index per half frame by PBCH payload bits a ,a ,a as described in [4,
A +5 A +6 A +7
TS 38.212].
For SS/PBCH blocks providing higher layer parameter MasterInformationBlock to a UE, the UE can be configured by
higher layer parameter ssb-PositionsInBurst in SystemInformationBlockType1, indexes of the SS/PBCH blocks for
which the UE does not receive other signals or channels in REs that overlap with REs corresponding to the SS/PBCH
blocks. The UE can also be configured per serving cell, by higher layer parameter ssb-PositionsInBurst in
ServingCellConfigCommon, indexes of the SS/PBCH blocks for which the UE does not receive other signals or
channels in REs that overlap with REs corresponding to the SS/PBCH blocks. A configuration by ssb-PositionsInBurst
in ServingCellConfigCommon overrides a configuration by ssb-PositionsInBurst in SystemInformationBlockType1. A
UE can be configured per serving cell by higher layer parameter ssb-periodicityServingCell a periodicity of the half
frames for reception of the SS/PBCH blocks per serving cell. If the UE is not configured a periodicity of the half frames
for receptions of the SS/PBCH blocks, the UE assumes a periodicity of a half frame. A UE assumes that the periodicity
is same for all SS/PBCH blocks in the serving cell.
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 10 ETSI TS 138 213 V15.2.0 (2018-07)
For initial cell selection, a UE may assume that half frames with SS/PBCH blocks occur with a periodicity of 2 frames.
Upon detection of a SS/PBCH block, the UE determines that a control resource set for Type0-PDCCH common search
k ≤ 23 k ≤11
space is present if [4, TS 38.211] for FR1 and if for FR2. The UE determines that a control
SSB SSB
resource set for Type0-PDCCH common search space is not present if k > 23 for FR1 and if k >11 for FR2.
SSB SSB
For a serving cell without transmission of SS/PBCH blocks, a UE acquires time and frequency synchronization with the
serving cell based on receptions of SS/PBCH blocks on the PCell, or on the PSCell, of the cell group for the serving
cell.
4.2 Transmission timing adjustments
If a UE is configured with two UL carriers in a serving cell, a same value of applies to both carriers. The
N
TA_offset
value of N is determined from the non-supplementary UL carrier. N is described in [10, TS 38.133].
TA_offset TA_offset
Upon reception of a timing advance command for a TAG containing the primary cell or PSCell, the UE adjusts uplink
transmission timing for PUCCH/PUSCH/SRS of the primary cell or PSCell based on the received timing advance
command.
The UL transmission timing for PUSCH/SRS/PUCCH of a secondary cell is the same as the primary cell if the
secondary cell and the primary cell belong to the same TAG. If the primary cell in a TAG operates with paired DL/UL
spectrum and a secondary cell in the same TAG operates with unpaired DL/UL spectrum, a UE may assume that
N ≥ 25560 for FR1 and N ≥13763 for FR2 [10, TS 38.133].
TA TA
If the UE is configured with a SCG, the UL transmission timing for PUSCH/SRS/PUCCH of a secondary cell other
than the PSCell is the same as the PSCell if the secondary cell and the PSCell belong to the same TAG.
Upon reception of a timing advance command or a timing adjustment indication for a TAG not containing the primary
cell or PSCell, if all the serving cells in the TAG have the same duplex mode type, the UE adjusts uplink transmission
timing for PUSCH/SRS/PUCCH of all the secondary cells in the TAG based on the received timing advance command
or a timing adjustment indication where the UL transmission timing for PUSCH/SRS/PUCCH is the same for all the
secondary cells in the TAG.
Upon reception of a timing advance command or a timing adjustment indication for a TAG not containing the primary
cell or PSCell, if a serving cell in the TAG has a different duplex mode type compared to the duplex mode type of
another serving cell in the same TAG, the UE adjusts uplink transmission timing for PUSCH/SRS/PUCCH of all the
secondary cells in the TAG by using N = 25560 for FR1 and N = 13763 for FR2 regardless of the duplex
TA_offset TA_offset
mode type of the serving cells and based on the received timing advance command or a timing adjustment indication
where the UL transmission timing for PUSCH/SRS/PUCCH is the same for all the secondary cells in the TAG.
For carrier aggregation operation with paired spectrum operation on one or more serving cells and unpaired spectrum
operation on one or more other serving cells and in a TAG without PCell or PSCell, a UE adjusts a transmission time
for all SCells in the TAG using the largest TA offset value within the TAG.
The timing adjustment indication specified in [11, TS 38.321] indicates the initial N used for a TAG. For a subcarrier
TA
μ
2 ⋅15 kHz, the timing advance command for a TAG indicates the change of the uplink timing relative to
spacing of
μ
the current uplink timing for the TAG as multiples of 16 ⋅ 64 ⋅T 2 . The start timing of the random access preamble is
c
specified in [4, TS 38.211].
In case of random access response, a timing advance command [11, TS 38.321], T , for a TAG indicates N values
A TA
by index values of T = 0, 1, 2, ., 3846, where an amount of the time alignment for the TAG for subcarrier spacing of
A
μ μ
2 ⋅15 kHz is given by . N is defined in [4, TS 38.211] and is relative to the subcarrier spacing
N = T ⋅16 ⋅ 64 2
TA A TA
of the first uplink transmission from the UE after the reception of the random access response.
In other cases, a timing advance command [11, TS 38.321], T , for a TAG indicates adjustment of the current N
A TA
value, N , to the new N value, N , by index values of T = 0, 1, 2,., 63, where for a subcarrier spacing of
TA A
TA_old TA_new
μ μ
2 ⋅15 kHz, N = N +()T − 31 ⋅16⋅ 64 2 .
TA_new TA_old A
ETSI
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3GPP TS 38.213 version 15.2.0 Release 15 11 ETSI TS 138 213 V15.2.0 (2018-07)
If a UE has multiple active UL BWPs, as described in Subclause 12, in a same TAG, including UL BWPs in two UL
carriers of a serving cell, the timing advance c
...