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TECHNICAL SPECIFICATION
5G;
NR;
Overall description;
Stage-2
(3GPP TS 38.300 version 15.4.0 Release 15)
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3GPP TS 38.300 version 15.4.0 Release 15 1 ETSI TS 138 300 V15.4.0 (2019-04)
Reference
RTS/TSGR-0238300vf40
Keywords
5G
ETSI
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3GPP TS 38.300 version 15.4.0 Release 15 2 ETSI TS 138 300 V15.4.0 (2019-04)
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
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
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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 38.300 version 15.4.0 Release 15 3 ETSI TS 138 300 V15.4.0 (2019-04)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
2 References . 8
3 Abbreviations and Definitions . 9
3.1 Abbreviations . 9
3.2 Definitions . 11
4 Overall Architecture and Functional Split . 11
4.1 Overall Architecture . 11
4.2 Functional Split . 12
4.3 Network Interfaces . 14
4.3.1 NG Interface . 14
4.3.1.1 NG User Plane . 14
4.3.1.2 NG Control Plane . 14
4.3.2 Xn Interface . 15
4.3.2.1 Xn User Plane . 15
4.3.2.2 Xn Control Plane . 16
4.4 Radio Protocol Architecture . 16
4.4.1 User Plane . 16
4.4.2 Control Plane . 16
4.5 Multi-Radio Dual Connectivity . 17
5 Physical Layer . 17
5.1 Waveform, numerology and frame structure . 17
5.2 Downlink . 18
5.2.1 Downlink transmission scheme . 18
5.2.2 Physical-layer processing for physical downlink shared channel . 18
5.2.3 Physical downlink control channels . 19
5.2.4 Synchronization signal and PBCH block . 19
5.2.5 Physical layer procedures . 20
5.2.5.1 Link adaptation . 20
5.2.5.2 Power Control . 20
5.2.5.3 Cell search . 20
5.2.5.4 HARQ . 20
5.2.5.5 Reception of SIB1 . 21
5.3 Uplink . 21
5.3.1 Uplink transmission scheme . 21
5.3.2 Physical-layer processing for physical uplink shared channel . 21
5.3.3 Physical uplink control channel . 22
5.3.4 Random access . 23
5.3.5 Physical layer procedures . 23
5.3.5.1 Link adaptation . 23
5.3.5.2 Uplink Power control . 23
5.3.5.3 Uplink timing control . 23
5.3.5.4 HARQ . 23
5.4 Carrier aggregation . 23
5.4.1 Carrier aggregation . 23
5.4.2 Supplementary Uplink . 23
5.5 Transport Channels. 24
6 Layer 2 . 25
6.1 Overview . 25
6.2 MAC Sublayer . 26
ETSI
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3GPP TS 38.300 version 15.4.0 Release 15 4 ETSI TS 138 300 V15.4.0 (2019-04)
6.2.1 Services and Functions . 26
6.2.2 Logical Channels . 27
6.2.3 Mapping to Transport Channels. 27
6.2.4 HARQ . 27
6.3 RLC Sublayer . 27
6.3.1 Transmission Modes . 27
6.3.2 Services and Functions . 28
6.3.3 ARQ . 28
6.4 PDCP Sublayer . 28
6.4.1 Services and Functions . 28
6.5 SDAP Sublayer . 29
6.6 L2 Data Flow . 29
6.7 Carrier Aggregation . 29
6.8 Dual Connectivity. 31
6.9 Supplementary Uplink . 31
6.10 Bandwidth Adaptation . 31
7 RRC . 32
7.1 Services and Functions . 32
7.2 Protocol States . 32
7.3 System Information Handling . 33
7.3.1 Overview . 33
7.3.2 Scheduling . 34
7.3.3 SI Modification . 35
7.4 Access Control . 35
7.5 UE Capability Retrieval framework . 35
7.6 Transport of NAS Messages . 35
7.7 Carrier Aggregation . 36
7.8 Bandwidth Adaptation . 36
8 NG Identities . 36
8.1 UE Identities . 36
8.2 Network Identities . 37
9 Mobility and State Transitions . 37
9.1 Overview . 37
9.2 Intra-NR . 38
9.2.1 Mobility in RRC_IDLE . 38
9.2.1.1 Cell Selection . 38
9.2.1.2 Cell Reselection . 38
9.2.1.3 State Transitions . 39
9.2.2 Mobility in RRC_INACTIVE. 41
9.2.2.1 Overview . 41
9.2.2.2 Cell Reselection . 42
9.2.2.3 RAN-Based Notification Area . 42
9.2.2.4 State Transitions . 42
9.2.2.4.1 UE triggered transition from RRC_INACTIVE to RRC_CONNECTED . 42
9.2.2.4.2 Network triggered transition from RRC_INACTIVE to RRC_CONNECTED . 44
9.2.2.5 RNA update. 45
9.2.3 Mobility in RRC_CONNECTED . 47
9.2.3.1 Overview . 47
9.2.3.2 Handover . 48
9.2.3.2.1 C-Plane Handling . 48
9.2.3.2.2 U-Plane Handling . 50
9.2.3.2.3 Data Forwarding . 52
9.2.3.3 Re-establishment procedure . 52
9.2.4 Measurements . 53
9.2.5 Paging . 56
9.2.6 Random Access Procedure . 56
9.2.7 Radio Link Failure . 57
9.2.8 Beam failure detection and recovery . 58
9.3 Inter RAT . 58
9.3.1 Intra 5GC . 58
ETSI
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3GPP TS 38.300 version 15.4.0 Release 15 5 ETSI TS 138 300 V15.4.0 (2019-04)
9.3.1.1 Cell Reselection . 58
9.3.1.2 Handover . 58
9.3.1.3 Measurements . 59
9.3.2 From 5GC to EPC . 59
9.3.2.1 Cell Reselection . 59
9.3.2.2 Handover and redirection . 59
9.3.2.3 Measurements . 59
9.3.2.4 Data Forwarding for the Control Plane . 59
9.3.2.5 Data Forwarding for the User Plane . 59
9.3.3 From EPC to 5GC . 60
9.3.3.1 Data Forwarding for the Control Plane . 60
9.3.3.2 Data Forwarding for the User Plane . 60
9.4 Roaming and Access Restrictions . 60
10 Scheduling . 61
10.1 Basic Scheduler Operation . 61
10.2 Downlink Scheduling . 61
10.3 Uplink Scheduling . 62
10.4 Measurements to Support Scheduler Operation . 62
10.5 Rate Control . 63
10.5.1 Downlink . 63
10.5.2 Uplink . 63
10.6 Activation/Deactivation Mechanism . 63
10.7 E-UTRA-NR Cell Resource Coordination . 64
11 UE Power Saving . 64
12 QoS . 64
12.1 Overview . 64
12.2 Explicit Congestion Notification . 67
13 Security. 67
13.1 Overview and Principles . 67
13.2 Security Termination Points . 69
13.3 State Transitions and Mobility . 69
14 UE Capabilities . 69
15 Self-Configuration and Self-Optimisation . 70
15.1 Definitions . 70
15.2 Void . 70
15.3 Self-configuration . 70
15.3.1 Dynamic configuration of the NG-C interface. 70
15.3.1.1 Prerequisites . 70
15.3.1.2 SCTP initialization . 70
15.3.1.3 Application layer initialization . 70
15.3.2 Dynamic Configuration of the Xn interface .
...