O-RAN.WG1.O-RAN-Architecture-Description-v05.00
Chapter 1.Introductory Material
1.1 Scope
This Technical Specification has been produced by the O-RAN Alliance.
The contents of the present document are subject to continuing work within O-RAN WG1 and may change following
formal O-RAN approval. Should the O-RAN Alliance modify the contents of the present document, it will be re-
released by O-RAN Alliance with an identifying change of release date and an increase in version number as follows:
Release xx.yy
where:
xx the first digit is incremented for all changes of substance, i.e., technical enhancements, corrections, updates,
etc. (the initial approved document will have xx=01).
yy the second digit is incremented when editorial only changes have been incorporated in the document.
zz the third digit included only in working versions of the document indicating incremental changes during the
editing process.
For the very first draft version of this document, the version shall be 00.00.01, followed by working versions 00.00.02,
00.00.03, etc. until an approved version is agreed for publication, which shall be numbered 01.00. After the first
version is published, the next working version shall be 01.00.01, followed by 01.00.02, 01.00.03 and so on until the
next published version is approved, which (if a minor revision with editorial changes only) shall be numbered 01.01 or
(if a major revision) shall be numbered 02.00. No published version of this document shall include three digit-groups.
The present document defines the O-RAN architecture and interfaces.
1.2 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.
[1] 3GPPTR21.905: “Vocabulary for 3GPP Specifications”.
[2] 3GPP TR 38.801: “Study on new radio access technology: Radio access architecture and interfaces (Release
14)”.
[3] 3GPP TS 23.501: “System Architecture for the 5G System (5GS); Stage 2”.
[4] 3GPP TS 28.622: " Generic Network Resource Model (NRM); Stage 2".
[5] 3GPP TS 32.101: “Technical Specification Group Services and System Aspects; Telecommunication
management; Principles and high level requirements (Release 15)”.
[6] 3GPP TS 36.401: “ Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Architecture
Description”.
[7] 3GPP TS 36.420: “Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 general aspects
and principles”.
[8] 3GPP TS 38.300 “NR; NR and NG-RAN Overall Description; Stage 2”.
[9] 3GPP TS 38.401: "NG-RAN; Architecture description".
[10] 3GPP TS 38.420: “NG-RAN; Xn general aspects and principles”.
[11] 3GPP TS 38.460: "NG-RAN; E1 general aspects and principles".
Copyright © 2021 by the O-RAN Alliance e.V. Your use is subject to the terms of the O-RAN Adopter License
Agreement in Annex ZZZ
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