ETSI TS 138 470 V15.7.0 (2020-01)

ETSI TS 138 470 V15.7.0 (2020-01)






TECHNICAL SPECIFICATION
5G;
NG-RAN;
F1 general aspects and principles
(3GPP TS 38.470 version 15.7.0 Release 15)

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3GPP TS 38.470 version 15.7.0 Release 15 1 ETSI TS 138 470 V15.7.0 (2020-01)



Reference
RTS/TSGR-0338470vf70
Keywords
5G
ETSI
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3GPP TS 38.470 version 15.7.0 Release 15 2 ETSI TS 138 470 V15.7.0 (2020-01)
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
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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Legal Notice
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. These shall be
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Modal verbs terminology
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"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 38.470 version 15.7.0 Release 15 3 ETSI TS 138 470 V15.7.0 (2020-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 4
1 Scope . 5
2 References . 5
3 Definitions and abbreviations . 5
3.1 Definitions . 5
3.3 Abbreviations . 6
4 General aspects . 6
4.1 F1 interface general principles . 6
4.2 F1 interface specification objectives . 6
4.3 F1 interface capabilities . 7
4.4 Void . 7
5 Functions of the F1 interface . 7
5.1 General . 7
5.2 F1-C functions . 7
5.2.1 F1 interface management function . 7
5.2.2 System Information management function . 7
5.2.3 F1 UE context management function. 8
5.2.4 RRC message transfer function . 8
5.2.5 Paging function . 8
5.2.6 Warning messages information transfer function . 8
5.3 F1-U functions . 9
5.3.1 Transfer of user data . 9
5.3.2 Flow control function. 9
5.4 TEIDs allocation . 9
6 Procedures of the F1 interface . 9
6.1 Control plane procedures . 9
6.1.1 Interface Management procedures . 9
6.1.2 Context Management procedures . 9
6.1.3 RRC Message Transfer procedures . 10
6.1.3A Warning Message Transmission procedures . 10
6.1.4 System Information procedures . 10
6.1.5 Paging procedures . 10
6.1.6 Void . 10
6.2 User plane procedures . 10
7 F1 interface protocol structure . 10
7.1 F1 Control Plane Protocol (F1-C) . 10
7.2 F1 User Plane Protocol (F1-U) . 11
8 Other F1 interface specifications . 11
8.1 NG-RAN F1 interface: layer 1 (3GPP TS 38.471) . 11
8.2 NG-RAN F1 interface: signalling transport (3GPP TS 38.472) . 11
8.3 NG-RAN F1 interface: F1AP specification (3GPP TS 38.473) . 12
8.4 NG-RAN F1 interface: data transport and transport signalling (3GPP TS 38.474). 12
8.5 NG-RAN F1 interface: user plane protocol (3GPP TS 38.425) . 12
Annex A (informative): Change history . 13
History . 14

ETSI

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3GPP TS 38.470 version 15.7.0 Release 15 4 ETSI TS 138 470 V15.7.0 (2020-01)
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:
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 38.470 version 15.7.0 Release 15 5 ETSI TS 138 470 V15.7.0 (2020-01)
1 Scope
The present document is an introduction to the 3GPP TS 38.47x series of technical specifications that define the F1
interface. The F1 interface provides means for interconnecting a gNB-CU and a gNB-DU of a gNB within an NG-RAN,
or for interconnecting a gNB-CU and a gNB-DU of an en-gNB within an E-UTRAN.
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 38.401: "NG-RAN; Architecture Description".
[3] 3GPP TS 38.471: "NG-RAN; F1 layer 1".
[4] 3GPP TS 38.472: "NG-RAN; F1 signalling transport".
[5] 3GPP TS 38.473: "NG-RAN; F1 Application Protocol (FnAP)".
[6] 3GPP TS 38.474: "NG-RAN; F1 data transport".
[7] 3GPP TS 38.425: "NG-RAN; Xn interface user plane protocol".
[8] 3GPP TS 38.300: "NR; Overall description; Stage-2".
[9] 3GPP TS 37.340: "NR; Multi-connectivity; Overall description; Stage-2".
[10] 3GPP TS 38.321: "NR; Medium Access Control (MAC) protocol specification".
[11] 3GPP TS 38.331: "NR; Radio Resource Control (RRC); Protocol specification".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP 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 3GPP
TR 21.905 [1].
en-gNB: as defined in TS 37.340 [9]
gNB-CU: as defined in TS 38.401 [2]
gNB-DU: as defined in TS 38.401 [2]
gNB: as defined in TS 38.300 [8]
ETSI

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3GPP TS 38.470 version 15.7.0 Release 15 6 ETSI TS 138 470 V15.7.0 (2020-01)
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and t
...