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TECHNICAL SPECIFICATION
LTE;
Evolved Universal Terrestrial Radio Access (E-UTRA);
Services provided by the physical layer
(3GPP TS 36.302 version 14.5.0 Release 14)
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3GPP TS 36.302 version 14.5.0 Release 14 1 ETSI TS 136 302 V14.5.0 (2019-05)
Reference
RTS/TSGR-0236302ve50
Keywords
LTE
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3GPP TS 36.302 version 14.5.0 Release 14 2 ETSI TS 136 302 V14.5.0 (2019-05)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
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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 36.302 version 14.5.0 Release 14 3 ETSI TS 136 302 V14.5.0 (2019-05)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 4
1 Scope . 5
2 References . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 6
4 Void . 8
4.1 Void . 8
4.2 Void . 8
5 Services and functions of the physical layer . 8
5.1 General . 8
5.2 Overview of L1 functions . 8
5.3 Void . 9
6 Model of physical layer of the UE . 9
6.1 Uplink model . 9
6.1.1 Uplink Shared Channel . 9
6.1.2 Random-access Channel . 10
6.2 Downlink model . 10
6.2.1 Downlink-Shared Channel . 10
6.2.2 Broadcast Channel . 12
6.2.3 Paging Channel . 13
6.2.4 Multicast Channel . 14
6.3 Sidelink model . 15
6.3.1 Sidelink Broadcast Channel . 15
6.3.2 Sidelink Discovery Channel . 16
6.3.3 Sidelink Shared Channel . 17
7 Void . 18
8 Parallel transmission of simultaneous Physical Channels and SRS . 18
8.1 Uplink . 19
8.2 Downlink . 20
8.3 Sidelink . 27
9 Measurements provided by the physical layer . 28
9.1 Void . 28
9.2 UE Measurements . 28
9.3 E-UTRAN Measurements . 28
Annex A (informative): Change history . 29
History . 31
ETSI
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3GPP TS 36.302 version 14.5.0 Release 14 4 ETSI TS 136 302 V14.5.0 (2019-05)
Foreword
rd
This Technical Specification has been produced by the 3 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 36.302 version 14.5.0 Release 14 5 ETSI TS 136 302 V14.5.0 (2019-05)
1 Scope
The present document is a technical specification of the services provided by the physical layer of E-UTRA to upper
layers.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non
specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] Void
[2] Void
[3] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[4] Void
[5] Void
[6] Void
[7] Void
[8] 3GPP TS 36.211: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and
modulation".
[9] Void
[10] Void
[11] 3GPP TS 36.214: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer;
Measurements".
[12] 3GPP TS 36.321: "Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access
Control (MAC) protocol specification".
[13] 3GPP TS 36.306: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE)
radio access capabilities".
[14] 3GPP TS 23.303: "Technical Specification Group Services and System Aspects; Proximity-based
services (ProSe)".
[15] Void
[16] 3GPP TS 23.285: "Technical Specification Group Services and System Aspects; Architecture
enhancements for V2X services".
ETSI
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3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [3] 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 [3].
Carrier frequency: center frequency of the cell.
Frequency layer: set of cells with the same carrier frequency.
NB-IoT: NB-IoT allows access to network services via E-UTRA with a channel bandwidth limited to 200 kHz.
Sidelink: UE to UE interface for sidelink communication, V2X sidelink communication and sidelink discovery. The
sidelink corresponds to the PC5 interface as defined in TS 23.303 [14].
Sidelink communication: AS functionality enabling ProSe Direct Communication as defined in TS 23.303 [14],
between two or more nearby UEs, using E-UTRA technology but not traversing any network node. In this version, the
terminology "sidelink communication" without "V2X" prefix only concerns PS unless explicitly stated otherwise.
Sidelink discovery: AS functionality enabling ProSe Direct Discovery as defined in TS 23.303 [14], using E-UTRA
technology but not traversing any network node.
V2X Sidelink communication: AS functionality enabling V2X Communication as defined in TS 23.285 [16], between
nearby UEs, using E-UTRA technology but not traversing any network node.
Timing Advance Group: See the definition in [12].
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in TR 21.905 [3] 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 [3].
For the purposes of the present document, the following abbreviations apply:
ACK Acknowledgement
ARQ Automatic Repeat Request
BCCH Broadcast Control Channel
BCH Broadcast Channel
BL Bandwidth reduced Low complexity
BLER Block Error Rate
CG Cell Group
CMAS Commercial Mobile Alert System
CP Cyclic Prefix
C-plane Control Plane
CRC Cyclic Redundancy Check
CSI Channel State Information
DC Dual Connectivity
DCCH Dedicated Control Channel
DL Downlink
DRX Discontinuous Reception
DTCH Dedicated Traffic Channel
DTX Discontinuous Transmission
eNB E-UTRAN NodeB
eIMTA Enhanced Interference Management and Traffic Adaptation
EPDCCH Enhanced physical downlink control channel
E-UTRA Evolved UTRA
E-UTRAN Evolved UTRAN
FDD Frequency Division Duplex
FDM Frequency Division Multiplexing
ETSI
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3GPP TS 36.302 version 14.5.0 Release 14 7 ETSI TS 136 302 V14.5.0 (2019-05)
FS Frame Structure
GERAN GSM EDGE Radio Access Network
GSM Global System for Mobile communication
HARQ Hybrid ARQ
LAA Licensed-Assisted Access
LTE Long Term Evolution
MAC Medium Access Control
MBMS Multimedia Broadcast Multicast Service
MBSFN Multimedia Broadcast multicast service Single Frequency Network
MCCH Multicast Control Channel
MCH Multicast Channel
MCS Modulation and Coding Scheme
MIMO Multiple Input Multiple Output
MTCH Multicast Traffic Channel
NACK Negative Acknowledgement
NB-IoT Narrow Band Internet of Things
NPBCH Narrow Band Physical Broadcast Channel
NPDCCH Narrow Band Physical Downlink Control Channel
NPDSCH Narrow Band Physical Downlink Shared Channel
NPRACH Narrow Band Physical Random Access Channel
NPUSCH Narrow Band Physical Uplink Shared Channel
OFDM Orthogonal Frequency Division Multiplexing
OFDMA Orthogonal Frequency Division Multiple Access
PBCH Physical broadcast channel
PDCCH Physical downlink control channel
PDSCH Physical downlink shared channel
PHY Physical layer
PMCH Physical multicast channel
PRACH Physical random access channel
PRB Physical Resource Block
ProSe Proximity based Services
PSBCH Physical Sidelink Broadcast CHannel
PSCCH Physical Sidelink Control Channel
PSCell Primary SCell
PSDCH Physical Sidelink Discovery Channel
PSSCH Physical Sidelink Shared CHannel
PUCCH Physical uplink control channel
PUSCH Physical uplink shared channel
QAM Quadrature Amplitude Modulation
RACH Random Access Channel
RF Radio Frequency
RRC Radio Resource Control
SAP Service Access Point
SBCCH Sidelink Broadcast Control CHannel
SC-FDMA Single Carrier – Frequency Division Multiple Access
SCell Secondary Cell
SC-PTM Single Cell Point to Multipoint
SL-BCH Sidelink Broadcast Channel
SL-DCH Sidelink Discovery Channel
SL-SCH Sidelink Shared Channel
SRS Sounding Reference Symbol
STCH Sidelink Traffic Channel
TAG Timing Advance Group
TB Transport Block
TDD Time Division Duplex
TTI Transmission Time Interval
UE User Equipment
UL Uplink
UMTS Universal Mobile Telecommunication System
U-plane User plane
UTRA Universal Terrestrial Radio Access
UTRAN Universal Terrestrial Radio Access Network
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V2X Vehicle-to-Everything
4 Void
4.1 Void
4.2 Void
5 Services and functions of the physical layer
5.1 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. Transport blocks
are delivered once every TTI.
5.2 Overview of L1 functions
The physical layer offers data transport services to higher layers. The access to these services is through the use of a
transport channel via the MAC sub-layer. The physical layer is expected to perform the following functions in order 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
- Transmit Diversity (TX diversity)
- Beamforming
- RF processing.
L1 functions are modelled for each transport channel in subclauses 6.1, 6.2 and 6.3.
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5.3 Void
6 Model of physical layer of the UE
The E-UTRA physical-layer model captures those characteristics of the E-UTRA 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;
- Other (non-transport-channel-based) higher-layer peer-to-peer signalling supported by the physical layer.
6.1 Uplink model
6.1.1 Uplink Shared Channel
The physical-layer model for Uplink Shared Channel transmission is described based on the corresponding physical-
layer-processing chain, see Figure 6.1.1-1. 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. It should be noted that, in the cases of PUSCH
and NPUSCH, the scheduling decision is fully done at the network side. The uplink transmission control in the UE then
configures the uplink physical-layer processing, based on uplink transport-format and resource-assignment information
received on the downlink.
- Higher-layer data passed to/from the physical layer
- One transport block of dynamic size delivered to the physical layer once every TTI.
- CRC and transport-block-error indication
- Transport-block-error indication delivered to higher layers.
- FEC and rate matching
- Channel coding rate is implicitly given by the combination of transport block size, modulation scheme and
resource assignment;
- Physical layer model support of HARQ: in case of Incremental Redundancy, the corresponding Layer 2 Hybrid-
ARQ process controls what redundancy version is to be used for the physical layer transmission for each TTI.
- Interleaving
- No control of interleaving by higher layers.
- Data modulation
- Modulation scheme is decided by MAC Scheduler (QPSK, 16QAM, 64QAM, and 256QAM; for BL UEs or UEs
in enhanced coverage, supported modulation schemes are QPSK and 16QAM; for NB-IoT, supported
modulation schemes are Pi/4-QPSK and Pi/2-BPSK for single-tone allocation, and QPSK for multi-tone
allocation).
- Mapping to physical resource
- L2-controlled resource assignment.
- Multi-antenna processing
- MAC Scheduler partly configures mapping from assigned resource blocks to the available number of antenna
ports.
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3GPP TS 36.302 version 14.5.0 Release 14 10 ETSI TS 136 302 V14.5.0 (2019-05)
- Support of L1 control signalling
- Transmission of ACK/NACK and CSI feedback related to DL data transmission
The model of Figure 6.1.1-1 also captures
- Transport via physical layer of Hybrid-ARQ related information associated with the PUSCH, to the peer HARQ
process at the transmitter side;
- Transport via physical layer of corresponding HARQ acknowledgements to PUSCH transmitter side (except for
NB-IoT UEs, BL UEs, and UEs in enhanced coverage).
If a UE is configured with one or more SCells, the physical-layer-processing chain in Figure 6.1.1-1 is repeated for
every UL Serving Cell.
Figure 6.1.1-1: Physical-layer model for UL-SCH transmission
6.1.2 Random-access Channel
The physical-layer model for RACH transmission is characterized by a random access burst that consists of a cyclic
prefix, a preamble, and a guard time during which nothing is transmitted.
The random access preambles are generated from Zadoff-Chu sequences with zero correlation zone (ZC-ZCZ),
generated from one or several root Zadoff-Chu sequences. For NB-IoT, the random access preambles are generated
from single-subcarrier frequency-hopping symbol groups. A symbol group consists of a cyclic prefix followed by five
identical symbols, whose value is constant across symbol groups during each NPRACH transmission.
6.2 Downlink model
6.2.1 Downlink-Shared Channel
The physical-layer model for Downlink Shared Channel transmission is described based on the corresponding PDSCH
or NPDSCH physical-layer-processing chain, see Figure 6.2.1-1. 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 on the figure.
- Higher-layer data passed to/from the physical layer
- N (up to two) transport blocks of dynamic size delivered to the physical layer once every TTI.
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3GPP TS 36.302 version 14.5.0 Release 14 11 ETSI TS 136 302 V14.5.0 (2019-05)
- CRC and transport-block-error indication
- Transport-block-error indication delivered to higher layers.
- FEC and rate matching
- Channel coding rate is implicitly given by the combination of transport block size, modulation scheme and
resource assignment;
- Physical layer model support of HARQ: in case of Incremental Redundancy, the corresponding Layer 2 Hybrid-
ARQ process controls what redundancy version is to be used for the physical layer transmission for each TTI.
- Data modulation
- Modulation scheme is decided by MAC Scheduler (QPSK, 16QAM, 64 QAM and 256QAM; for BL UEs or UEs
in enhanced coverage, supported modulation schemes are QPSK and 16QAM; for NB-IoT, only QPSK is
supported).
Multi-antenna processing
- MAC Scheduler partly configures mapping from modulated code words (for each stream) to the available
number of antenna ports.
- Mapping to physical resource
- L2-controlled resource assignment.
- Support of L1 control signalling
- Transmission of scheduler related control signals.
- Support for Hybrid-ARQ-related signalling
The model of Figure 6.2.1-1 also captures:
- Transport via physical layer of Hybrid-ARQ related information associated with the PDSCH, to the peer HARQ
process at the receiver side;
- Transport via physical layer of corresponding HARQ acknowledgements to PDSCH transmitter side.
If a UE is configured with one or more SCells, the physical-layer-processing chain in Figure 6.2.1-1 is repeated for
every DL Serving Cell.
NOTE: The signalling of transport-format and resource-allocation is not captured in the physical-layer model. At
the transmitter side, this information can be directly derived from the configuration of the physical layer.
The physical layer then transports this information over the radio interface to its peer physical layer,
presumably multiplexed in one way or another with the HARQ-related information. On the receiver side,
this information is, in contrast to the HARQ-related information, used directly within the physical layer
for PDSCH demodulation, decoding etc., without passing through higher layers.
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Figure 6.2.1-1: Physical-layer model for DL-SCH transmission
6.2.2 Broadcast Channel
The physical-layer model for BCH transmission is characterized by a fixed pre-defined transport format. The TTI
(repetition rate) of the BCH is 40 ms except for NB-IoT and 640 ms for NB-IoT. The BCH physical-layer model is
described based on the corresponding BCH physical-layer-processing chain, see Figure 6.2.2-1:
- Higher-layer data passed to/from the physical layer
- A single (fixed-size) transport block per TTI.
- CRC and transport-block-error indication
- Transport-block-error indication delivered to higher layers.
- FEC and rate matching
- Channel coding rate is implicitly given by the combination of transport block size, modulation scheme and resource
assignment;
- No BCH Hybrid ARQ, i.e. no higher-layer control of redundancy version.
- Data modulation
- Fixed modulation scheme (QPSK), i.e. no higher-layer control.
- Mapping to physical resource
- Fixed pre-determined transport format and resource allocation, i.e. no higher-layer control.
- Multi-antenna processing
- Fixed pre-determined processing, i.e. no higher-layer control.
- Support for Hybrid-ARQ-related signalling
- No Hybrid ARQ.
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3GPP TS 36.302 version 14.5.0 Release 14 13 ETSI TS 136 302 V14.5.0 (2019-05)
Figure 6.2.2-1: Physical-layer model for BCH transmission
NOTE: For NB-IoT, the BCH transport block of 40 bits is truncated to 34 bits by the NodeB when provided to
the physical layer for BCH transmission. The BCH transport block of 34 bits is padded to 40 bits when
delivered by the UE physical layer to the upper layer.
6.2.3 Paging Channel
The physical-layer model for PCH transmission is described based on the corresponding PCH physical-layer-processing
chain, see Figure 6.2.3-1. 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 on the figure.
- Higher-layer data passed to/from the
...