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TECHNICAL SPECIFICATION
LTE;
Evolved Universal Terrestrial Radio Access (E-UTRA);
LTE physical layer;
General description
(3GPP TS 36.201 version 15.2.0 Release 15)
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3GPP TS 36.201 version 15.2.0 Release 15 1 ETSI TS 136 201 V15.2.0 (2019-04)
Reference
RTS/TSGR-0136201vf20
Keywords
LTE
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3GPP TS 36.201 version 15.2.0 Release 15 2 ETSI TS 136 201 V15.2.0 (2019-04)
Intellectual Property Rights
Essential patents
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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 36.201 version 15.2.0 Release 15 3 ETSI TS 136 201 V15.2.0 (2019-04)
Contents
Intellectual Property Rights . 2
Foreword . 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 . 6
4 General description of LTE Layer 1 . 7
4.1 Relation to other layers . 7
4.1.1 General protocol architecture . 7
4.1.2 Service provided to higher layers . 7
4.2 General description of Layer 1 . 8
4.2.1 Multiple access . 8
4.2.2 Physical channels and modulation . 9
4.2.3 Channel coding and interleaving . 10
4.2.4 Physical layer procedures . 10
4.2.5 Physical layer measurements . 10
5 Document structure of LTE physical layer specification . 11
5.1 Overview . 11
5.2 TS 36.201: Physical layer – General description. 11
5.3 TS 36.211: Physical channels and modulation . 11
5.4 TS 36.212: Multiplexing and channel coding. 12
5.5 TS 36.213: Physical layer procedures . 12
5.6 TS 36.214: Physical layer – Measurements . 12
5.7 TS 36.216: Physical layer for relaying operation . 12
Annex A (informative): Preferred mathematical notations . 13
Annex B (informative): Change history . 14
History . 15
ETSI
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3GPP TS 36.201 version 15.2.0 Release 15 4 ETSI TS 136 201 V15.2.0 (2019-04)
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 36.201 version 15.2.0 Release 15 5 ETSI TS 136 201 V15.2.0 (2019-04)
1 Scope
The present document describes a general description of the physical layer of the E-UTRA radio interface. The present
document also describes the document structure of the 3GPP physical layer specifications, i.e. TS 36.200 series. The TS
36.200 series specifies the Uu and Un points for the 3G LTE mobile system, and defines the minimum level of
specifications required for basic connections in terms of mutual connectivity and compatibility.
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] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 36.211: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and
modulation".
[3] 3GPP TS 36.212: "Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and
channel coding".
[4] 3GPP TS 36.213: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer
procedures".
[5] 3GPP TS 36.214: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer –
Measurements".
[6] 3GPP TS 36.216: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer for
relaying operation".
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].
Definition format
: .
example: text used to clarify abstract rules by applying them literally.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
Symbol format
ETSI
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3GPP TS 36.201 version 15.2.0 Release 15 6 ETSI TS 136 201 V15.2.0 (2019-04)
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].
BPSK Binary Phase Shift Keying
CoMP Coordinated Multi-Point
CP Cyclic Prefix
CQI Channel Quality Indicator
CRC Cyclic Redundancy Check
CSI Channel State Information
eNode-B Evolved Node B
EPDCCH Enhanced Physical Downlink Control Channel
E-UTRA Evolved Universal Terrestrial Radio Access
FDD Frequency Division Duplex
HARQ Hybrid Automatic Repeat Request
LAA Licensed-Assisted Access
LTE Long Term Evolution
MAC Medium Access Control
MBMS Multimedia Broadcast and Multicast Service
MBSFN Multicast/Broadcast over Single Frequency Network
MIMO Multiple Input Multiple Output
MPDCCH MTC Physical Downlink Control Channel
MTC Machine Type Communications
NPBCH Narrowband Physical Broadcast Channel
NPDCCH Narrowband Physical Downlink Control Channel
NPDSCH Narrowband Physical Downlink Shared Channel
NPRACH Narrowband Physical Random Access Channel
NPUSCH Narrowband Physical Uplink Shared Channel
OFDM Orthogonal Frequency Division Multiplexing
PBCH Physical Broadcast Channel
PCFICH Physical Control Format Indicator Channel
PDSCH Physical Downlink Shared Channel
PDCCH Physical Downlink Control Channel
PHICH Physical Hybrid ARQ Indicator Channel
PMCH Physical Multicast Channel
PRACH Physical Random Access Channel
ProSe Proximity Services
PSBCH Physical Sidelink Broadcast Channel
PSCCH Physical Sidelink Control Channel
PSDCH Physical Sidelink Discovery Channel
PSSCH Physical Sidelink Shared Channel
PUCCH Physical Uplink Control Channel
PUSCH Physical Uplink Shared Channel
QAM Quadrature Amplitude Modulation
QPP Quadratic Permutation Polynomial
QPSK Quadrature Phase Shift Keying
RLC Radio Link Control
RN Relay Node
R-PDCCH Relay Physical Downlink Control Channel
RRC Radio Resource Control
RSSI Received Signal Strength Indicator
RSRP Reference Signal Received Power
RSRQ Reference Signal Received Quality
SAP Service Access Point
SC-FDMA Single-Carrier Frequency Division Multiple Access
SPDCCH Short Physical Downlink Control Channel
SPUCCH Short Physical Uplink Control Channel
TDD Time Division Duplex
TX Diversity Transmit Diversity
ETSI
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3GPP TS 36.201 version 15.2.0 Release 15 7 ETSI TS 136 201 V15.2.0 (2019-04)
UE User Equipment
V2X Vehicle-to-Everything
4 General description of LTE Layer 1
4.1 Relation to other layers
4.1.1 General protocol architecture
The radio interface described in this specification covers the interface between the User Equipment (UE) and the
network, and sidelink transmissions between UEs. The radio interface is composed of the Layer 1, 2 and 3. The TS
36.200 series describes the Layer 1 (Physical Layer) specifications. Layers 2 and 3 are described in the 36.300 series.
Layer 3 Radio Resource Control (RRC)
Logical channels
Layer 2
Medium Access Control
(MAC)
Transport channels
Physical layer
Layer 1
Figure 1: Radio interface protocol architecture around the physical layer
Figure 1 shows the E-UTRA radio interface protocol architecture around the physical layer (Layer 1). The physical
layer interfaces the Medium Access Control (MAC) sub-layer of Layer 2 and the Radio Resource Control (RRC) Layer
of Layer 3. The circles between different layer/sub-layers indicate Service Access Points (SAPs). The physical layer
offers a transport channel to MAC. The transport channel is characterized by how the information is transferred over the
radio interface. MAC offers different logical channels to the Radio Link Control (RLC) sub-layer of Layer 2. A logical
channel is characterized by the type of information transferred.
4.1.2 Service provided to higher layers
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
ETSI
Control / Measurements
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3GPP TS 36.201 version 15.2.0 Release 15 8 ETSI TS 136 201 V15.2.0 (2019-04)
- Transmit Diversity (TX diversity)
- Beamforming
- RF processing. (Note: RF processing aspects are specified in the TS 36.100 series)
4.2 General description of Layer 1
4.2.1 Multiple access
The multiple access scheme for the LTE physical layer is based on Orthogonal Frequency Division Multiplexing
(OFDM) with a cyclic prefix (CP) in the downlink, and on Single-Carrier Frequency Division Multiple Access (SC-
FDMA) with a cyclic prefix in the uplink and sidelink. To support transmission in paired and unpaired spectrum, two
duplex modes are supported: Frequency Division Duplex (FDD), supporting full duplex and half duplex operation, and
Time Division Duplex (TDD).
The Layer 1 is defined in a bandwidth agnostic way based on resource blocks, allowing the LTE Layer 1 to adapt to
various spectrum allocations. A resource block spans either 12 sub-carriers with a sub-carrier bandwidth of 15kHz or 24
sub-carriers with a sub-carrier bandwidth of 7.5kHz each over a slot duration of 0.5ms, or 144 sub-carriers with a sub-
carrier bandwidth of 1.25kHz over a slot duration of 1ms. Narrowband operation is also define
...