Content for TS 38.202 Word version: 18.0.0
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
3.1 Terms
3.2 Symbols
3.3 Abbreviations
4 Services and functions of the physical layer
4.1 General
4.2 Overview of L1 functions
...
...
1 Scope p. 5
The present document is a technical specification of the services provided by the physical layer of 5G-NR to upper layers.
2 References p. 5
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications"
[2]
TS 38.201: "NR; Physical Layer - General Description"
[3]
TS 38.211: "NR; Physical channels and modulation"
[4]
TS 38.212: "NR; Multiplexing and channel coding"
[5]
TS 38.213: "NR; Physical layer procedures for control"
[6]
TS 38.214: "NR; Physical layer procedures for data"
[7]
TS 38.215: "NR; Physical layer measurements"
[8]
TS 38.306: "NR; User Equipment (UE) radio access capabilities"
3 Definitions of terms, symbols and abbreviations p. 5
3.1 Terms p. 5
For the purposes of the present document, the terms and definitions given in 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 TR 21.905.
3.2 Symbols p. 5
For the purposes of the present document, the following symbols apply:
3.3 Abbreviations p. 5
For the purposes of the present document, the abbreviations given in TR 21.905 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.
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
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 p. 6
4.1 General p. 6
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 p. 6
As mentioned in 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.
