ETSI TS 138 202 V17.1.0 (2022-04)

5G; NR; Services provided by the physical layer (3GPP TS 38.202 version 17.1.0 Release 17)

RTS/TSGR-0138202vh10

General Information

• Status: Not Published
• Technical Committee: 3GPP RAN 1 - Radio layer 1 specification
• Current Stage: 12 - Completion
• Completion Date: 26-Apr-2022

Standards Content (Sample)

ETSI TS 138 202 V17.1.0 (2022-04)






TECHNICAL SPECIFICATION
5G;
NR;
Services provided by the physical layer
(3GPP TS 38.202 version 17.1.0 Release 17)

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3GPP TS 38.202 version 17.1.0 Release 17 1 ETSI TS 138 202 V17.1.0 (2022-04)

Reference
RTS/TSGR-0138202vh10
Keywords
5G
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3GPP TS 38.202 version 17.1.0 Release 17 2 ETSI TS 138 202 V17.1.0 (2022-04)
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3GPP TS 38.202 version 17.1.0 Release 17 3 ETSI TS 138 202 V17.1.0 (2022-04)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 4
1 Scope . 5
2 References . 5
3 Definitions, symbols and abbreviations . 5
3.1 Definitions . 5
3.2 Symbols . 5
3.3 Abbreviations . 5
4 Services and functions of the physical layer . 6
4.1 General . 6
4.2 Overview of L1 functions . 6
5 Model of physical layer of the UE . 7
5.1 Uplink model . 7
5.1.1 Uplink shared channel . 7
5.1.2 Random access channel . 8
5.2 Downlink model . 8
5.2.1 Downlink shared channel . 8
5.2.2 Broadcast channel . 8
5.2.3 Paging channel . 9
5.3 Sidelink model . 10
5.3.1 Sidelink shared channel . 10
5.3.2 Broadcast channel . 11
6 Simultaneous transmission and reception of physical channels and physical signals . 12
6.1 Uplink . 12
6.2 Downlink . 13
6.3 Sidelink . 15
7 Measurements provided by the physical layer . 16
7.1 UE measurements . 16
Annex A (informative): Change history . 17
History . 18

ETSI

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3GPP TS 38.202 version 17.1.0 Release 17 4 ETSI TS 138 202 V17.1.0 (2022-04)
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:
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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 38.202 version 17.1.0 Release 17 5 ETSI TS 138 202 V17.1.0 (2022-04)
1 Scope
The present document is a technical specification of the services provided by the physical layer of 5G-NR to upper
layers.
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 38.211: "NR; Physical channels and modulation"
[4] 3GPP TS 38.212: "NR; Multiplexing and channel coding"
[5] 3GPP TS 38.213: "NR; Physical layer procedures for control"
[6] 3GPP TS 38.214: "NR; Physical layer procedures for data"
[7] 3GPP TS 38.215: "NR; Physical layer measurements"
[8] 3GPP TS 38.306: "NR; User Equipment (UE) radio access capabilities"

3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [1] and the following apply. A
term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [1].
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
TR 21.905 [1].
For the purposes of the present document, the following abbreviations apply:
ARQ Automatic Repeat Request
BCH Broadcast Channel
CA Carrier Aggregation
CRC Cyclic Redundancy Check
DC Dual Connectivity
DL Downlink
FEC Forward Error Correction
GF Grant-Free
MAC Medium Access Control
ETSI

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3GPP TS 38.202 version 17.1.0 Release 17 6 ETSI TS 138 202 V17.1.0 (2022-04)
MIMO Multiple Input Multiple Output
PBCH Physical Broadcast Channel
PCH Paging Channel
PDCCH Physical Downlink Control Channel
PDSCH Physical Downlink Shared Channel
PRACH Physical Random Access Channel
PUCCH Physical Uplink Control Channel
PUSCH Physical Uplink Shared Channel
RACH Random Access Channel
RF Radio Frequency
RNTI Radio Network Temporary Identifier
SCH Shared Channel
SI System Information
SPS Semi-Persistent Scheduling
SRS Sounding Reference Signal
TPC Transmit Power Control
UL Uplink

4 Services and functions of the physical layer
4.1 General
The physical layer offers data transport services to higher layers.
The access to these services is through the use of transport channels via the MAC sub-layer.
A transport block is defined as the data delivered by MAC layer to the physical layer and vice versa.
4.2 Overview of L1 functions
As mentioned in [2, TS 38.201], the physical layer is expected to perform the following functions to provide the data
transport service:
- Error detection on the transport channel and indication to higher layers;
- FEC encoding/decoding of the transport channel;
- Hybrid ARQ soft-combining;
- Rate matching of the coded transport channel to physical channels;
- Mapping of the coded transport channel onto physical channels;
- Power weighting of physical channels;
- Modulation and demodulation of physical channels;
- Frequency and time synchronisation;
- Radio characteristics measurements and indication to higher layers;
- Multiple Input Multiple Output (MIMO) antenna processing;
- RF processing.
L1 functions are modelled for each transport channel in clause 5.
ETSI

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3GPP TS 38.202 version 17.1.0 Release 17 7 ETSI TS 138 202 V17.1.0 (2022-04)
5 Model of physical layer of the UE
The 5G-NR physical-layer model captures those characteristics of the 5G-NR physical-layer that are relevant from the
point-of-view of higher layers. More specifically, the physical-layer model captures:
- The structure of higher-layer data being passed down to or up from the physical layer;
- The means by which higher layers can configure the physical layer;
- The different indications (error indications, channel-quality indications, etc.) that are provided by the physical
layer to higher layers.
5.1 Uplink model
5.1.1 Uplink shared channel
The physical-layer model for Uplink Shared Channel transmission is described based on the corresponding PUSCH
physical-layer-processing chain, see Figure 5.1.1-1. Processing steps that are relevant for the physical-layer model, e.g.
in the sense that they are configurable by higher layers, are highlighted in blue.
- Higher-layer data passed to/from the physical layer
- CRC and transport-block-error indication
- FEC and rate matching
- Data modulation
- Mapping to physical resource
- Multi-antenna processing
- Support of L1 control and Hybrid-ARQ-related signalling
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Figure 5.1.1-1: Physical-layer model for UL-SCH transmission

ETSI

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3GPP TS 38.202 version 17.1.0 Release 17 8 ETSI TS 138 202 V17.1.0 (2022-04)
5.1.2 Random access channel
The physical-layer model for RACH transmission is characterized by a PRACH preamble format that consists of a
cyclic prefix, a preamble, and a guard time during which nothing is transmitted.
5.2 Downlink model
5.2.1 Downlink shared channel
The physical-layer model for Downlink Shared Channel transmission is described based on the corresponding PDSCH
physical-layer-processing chain, see Figure 5.2.1-1. Processing steps that are relevant for the physical-layer model,
...