3GPP TR 21.900: 移动通信技术标准 - GSM, LTE, UMTS

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"ETSI TR 121900 V9.0.0 (2010-01)" 是一份技术报告，详细介绍了3GPP（第三代合作伙伴计划）的工作方法，涉及到数字蜂窝通信系统（第二阶段+）、通用移动通信系统(UMTS)以及长期演进(LTE)的相关技术标准。此报告由欧洲电信标准化协会(ETSI)发布，是Release 9版本的一部分，主要关键词包括GSM、LTE和UMTS。这篇文档详细阐述了在3GPP框架下，如何进行技术规范的制定和工作流程。3GPP是一个国际性的标准化组织，负责制定全球移动通信系统（GSM）、UMTS以及LTE等新一代无线通信技术的标准。TR 21.900涵盖了3GPP技术规范组(TSG)的工作方法，旨在确保不同国家和地区的通信系统间有良好的互操作性和兼容性。报告内容可能包括以下几个核心知识点： 1. **3GPP组织结构与工作流程**：描述了3GPP内部各技术规范组(TSG)的职责划分，如TSG SA(服务和体系架构)、TSG RAN(无线接入网络)和TSG CT(核心网络与终端)等。还可能涉及工作规范、会议议程设定、提案提交、投票决策和版本管理等环节。 2. **UMTS与LTE技术**：UMTS是3G技术，基于WCDMA（宽频码分多址）标准，而LTE是4G技术，采用OFDMA（正交频分多址）和MIMO（多输入多输出）技术，提供更高的数据传输速率和更低的延迟。报告可能包含这两者在系统架构、空中接口、频率分配、网络优化等方面的具体标准。 3. **GSM系统**：作为2G移动通信标准，GSM在3GPP标准中仍占有一定地位，特别是对于向3G和4G演进的过渡。报告可能涵盖GSM到UMTS/LTE的互操作性问题和升级路径。 4. **标准化过程**：详细说明了从技术提案到形成标准的步骤，包括技术研究、需求分析、功能定义、协议设计、性能评估和试验验证等。 5. **版本管理和更新**：Release 9是3GPP的一个重要版本，报告可能包含这个版本中引入的新特性、改进和对之前版本的修订，反映了当时移动通信领域的最新发展和技术趋势。 6. **电子版与印刷版一致性**：ETSI强调了电子版和印刷版的一致性问题，指出在可能出现的版本差异中，PDF版本被视为参考版本，并且在争议解决时，以ETSI秘书处特定网络驱动器上保存的PDF版本打印为准。这份技术报告对于理解3GPP的标准化进程、移动通信系统的演进，以及相关技术规范的制定具有重要的参考价值，是工程师、研发人员、政策制定者以及行业分析师不可或缺的参考资料。

ETSI

TSI TR 121 900 V9.0.0 (2010

01)

3GPP TR 21.900 version 9.0.0 Release 9

1 Scope

This document outlines the working methods to be used by the 3GPP Technical Specification Groups and their Working

Groups and their Sub-Groups, and by the 3GPP Support Team in relation to document management, i.e. handling of

specifications, updating procedures, Change Request procedures, version control mechanisms, specifications status

information etc. It complements the rules and procedures defined for 3GPP. This document does not stipulate the details

of the internal working of the TSG Sub-Groups. From the Technical Specification Group point of view, a task and

responsibility is given to a Working Group directly answering to the Technical Specification Group. In practice, the

work/task may be carried out in a subgroup of that Working Group.

1A 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.

3GPP TR 21.801: "Specification drafting rules".

3GPP TR 21.905: "Vocabulary for 3GPP Specifications".

3GPP TS 21.101: "Technical Specifications and Technical Reports for a UTRAN-based 3GPP system".

3GPP TS 41.101: "Technical Specifications and Technical Reports for a GERAN-based 3GPP system".

ITU-T Recommendation I.130: "Method for the characterization of telecommunication services supported by an

ISDN and network capabilities of an ISDN".

2 Definitions and abbreviations

For the purposes of the present document, the following terms and those in 3GPP TR 21.905 apply.

building block: sub-division of a feature, representing a coherent set of technical functionality which would generally

be expected to reside in a single system element.

change control: procedure whereby proposed modifications to a specification are presented for approval to the TSG as

formal Change Requests.

closed: specification status in which no changes of any kind to the specification are permitted.

Change Request (CR): formal proposal presented on a standard form to modify a specification which is under change

control.

draft: specification status prior to change control, in which changes may be made without formal Change Requests.

early implementation: implementation of a particular feature on a platform of a release earlier than the release that

contains the feature.

feature: new or substantially enhanced functionality which represents added value to the existing system.

frozen: specification status in which only essential corrections are permitted.

Group: TSG or TSG Sub-Group.

ETSI

ETSI TR 121 900 V9.0.0 (2010

01)

3GPP TR 21.900 version 9.0.0 Release 9

major version: For version x.y.z of a specification, x is called the major version.

Example: For version 3.2.0 of a specification, the major version is 3.

specification: generic term standing for Technical Specification and Technical Report.

Study Item: type of Work Item which will conduct feasibility studies and will result in a Technical Report

TSG: Technical Specification Group.

TSG change control: specification status in which the Technical Specification Group is responsible for approval of

Change Requests.

TSG Sub-Group: Working Group or subgroup of a Working Group or of a Sub-Group.

Working Group (WG): official subgroup of a TSG reporting to that TSG.

WG Change Control: specification status in which the Working Group is responsible for agreeing Change Requests

for submission to the TSG for approval.

version: unique identifier in the form x.y.z for a specification at a given point in time.

Example: version 3.12.3.

withdrawn: specification status in which the given version of the specification no longer belongs to the appropriate set

of valid specifications.

Work Item (WI): description of an enhancement to a technical area, which may be categorized as Study Item, Feature,

Building Block or Work Task.

Work Item description (WID): description of a Work Item in a standard Work Item Description sheet.

work task: sub-division of a building block, representing a self-contained, well-scoped and well-scheduled item of

work.

3 General responsibilities of the Support Team

3.1 Specifications, meetings and liaisons

The Support Team is responsible for the management of the work of the TSGs. This includes editorship and

management of specifications once they have been put under TSG change control. It also includes preparation of and

support for the meetings (including meeting reports) of the TSGs and their Working Groups, and subgroups in

descending priority.

It furthermore includes liaison with other bodies and relevant groups and institutions.

3.2 Registration of code points

In the course of 3GPP's work, it will from time to time be necessary to register code points in protocols maintained by

bodies other than 3GPP, for example, Multipurpose Internet Mail Extensions (MIME) types registered with the Internet

Assigned Numbers Authority (IANA, http://www.iana.org/

Wherever possible, registration of such code points shall be entrusted to the 3GPP Support Team rather than being

performed by an individual delegate. Since 3GPP is not a legally constituted entity, the Support Team shall register

such code points in the name of one of the Organizational Partners on behalf of all the Organizational Partners of 3GPP.

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