O-RAN联盟NR ORAN WG1架构描述v05.00

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"O-RAN.WG1.O-RAN-Architecture-Description-v05.00.docx 是一份由O-RAN ALLIANCE发布的技术规范文档，详细介绍了O-RAN无线网络架构的描述，主要关注5G NR（New Radio）技术在ORAN（Open RAN，开放无线接入网）中的应用。文档涵盖了ORAN联盟的工作范围，并声明了使用、访问或下载此规格书需遵守的O-RAN采纳者许可协议。" 本文档是ORAN联盟WG1（工作小组1）的工作成果，其目标是定义和开发开放和智能的无线接入网络架构。内容可能随着O-RAN联盟的正式批准而不断更新，每次更新都会通过版本号和发布日期的变化来标识。 O-RAN架构描述了如何在无线通信领域，特别是5G NR网络中实现ORAN概念。ORAN的目标是通过引入更多的开放接口和软件定义的方法，打破传统无线接入网络中供应商特定的封闭体系，从而促进网络的灵活性、可扩展性和成本效益。这包括对无线单元(RU - Radio Unit)、分布式单元(DU - Distributed Unit)和集中式单元(CU - Centralized Unit)之间的接口进行标准化，以及引入控制面与用户面分离的概念。 5G NR作为第五代移动通信标准，提供了更高的数据速率、更低的延迟、更大的连接容量和更广泛的频谱效率。在ORAN架构下，5G NR的部署和管理将更加灵活，能够适应各种场景，如智慧城市、自动驾驶、远程医疗等。文档的修订历史部分表明，该技术规范会随着工作组的持续工作不断更新，版本号的变更反映了内容的演化。例如，"Release xx.yy"中的xx表示主版本号，yy表示次版本号，每次更新都会根据修改程度来调整这两个数字。这份文档对于理解ORAN架构及其在5G NR无线通信中的作用至关重要，它为开发者、网络运营商和行业参与者提供了详细的指导，帮助他们在开放和智能化的无线接入网络环境中进行设计和部署。

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] 3GPPTR21.905: “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".

Agreement in Annex ZZZ

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O-RAN.WG1.O-RAN-Architecture-Description-v05.00

[12] 3GPP TS 38.470: "NG-RAN; F1 general aspects and principles".

[13] O-RAN White Paper: “O-RAN: Towards an Open and Smart RAN”, October 2018.

[14] O-RAN.WG1.Information Model and Data Models-v01.00: “O-RAN Working Group 1; O-RAN

Information Model and Data Models Specification”.

[15] O-RAN.WG1.Use-Cases-Analysis-Report-v06.00: “O-RAN Working Group 1; Use Cases Analysis Report

v06.00”.

[16] O-RAN.WG1.Use-Cases-Detailed-Specification-v06.00: “O-RAN Working Group 1; Use Cases Detailed

Specification v06.00”.

[17] O-RAN-WG2.A1GAP-v02.03: “O-RAN Working Group 2; A1 interface: General Aspects and Principles

v02.03”.

[18] O-RAN.WG2.Non-RT-RIC-ARCH-TS-v01.00: “O-RAN Working Group 2; Non-RT RIC Architecture

Technical Specification v01.00”.

[19] ORAN-WG3.E2GAP.0-v01.01: “O-RAN Working Group 3; Near-Real-time RAN Intelligent Controller

Architecture & E2 General Aspects and Principles v01.01”.

[20] ORAN-WG3.E2SM-v01.01: “O-RAN Working Group 3; Near-Real-time RAN Intelligent Controller E2

Service Model (E2SM) v01.01”.

[21] O-RAN.WG4.CTI-TCP.0-v02.00: “Cooperative Transport Interface; Transport Control Plane Specification

v02.00”.

[22] O-RAN.WG4.CTI-TMP.0-v02-00: “Cooperative Transport Interface; Transport Management Plane

Specification v02.00”.

[23] O-RAN-WG4.CUS.0-v07.00: “O-RAN Fronthaul Working Group; Control, User and Synchronization Plane

Specification v07.00”.

[24] O-RAN-WG4.MP.0-v07.00: “O-RAN Alliance Working Group 4; Management Plane Specification

v07.00”.

[25] O-RAN-WG6.CAD-v02.01: “Cloud Architecture and Deployment Scenarios for O-RAN Virtualized RAN

v02.01”.

[26] ORAN.WG7.IPC-HRD-Opt8.0-v02.00: “O-RAN WG7; Hardware Reference Design Specification for

Indoor Picocell FR1 with Split Architecture Option 8 v02.00”.

[27] O-RAN-WG10.OAM-Architecture-v05.00: “O-RAN WG1 Operations and Maintenance Architecture

v05.00”.

[28] O-RAN-WG10.O1-Interface-v05.00: “O-RAN Operations and Maintenance Interface Specification v05.00”.

1.3 Definitions and Abbreviations

1.3.1 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].

E2 Node: A logical node terminating E2 interface. In this version of the specification, O-RAN nodes terminating E2

interface are:

 for NR access: O-CU-CP, O-CU-UP, O-DU or any combination as defined in [19],

 for E-UTRA access: O-eNB as defined in Section 4.3.7.

Managed Application: The definition of Managed Application is given in O-RAN Operations and Maintenance

Architecture [27].

Managed Element: The definition of a Managed Element (ME) is given in 3GPP TS 28.622 [4], Section 4.3.3.

Agreement in Annex ZZZ

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