ETSI 3GPP TR 21.900 V12.0.0: UMTS, LTE与GSM技术标准概述

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本资源是关于欧洲电信标准化协会(ETSI)发布的一份技术规范文档——ETSI TR 121900 V12.0.0，日期为2014年9月。这份文档聚焦于移动通信系统的技术标准，特别是针对3GPP（3rd Generation Partnership Project）的演进。3GPP TR 21.900 Version 12.0.0 Release 12是该系列的一部分，它详细阐述了3G、4G（如UMTS，通用移动通信系统）和LTE（长期演进，第四代移动通信技术）的相关技术工作方法。文档的核心内容围绕以下几个方面展开： 1. **Digital Cellular Telecommunications System (Phase 2+)**：这部分可能涉及早期的数字蜂窝通信系统的升级和扩展，旨在提高数据传输效率和网络性能。 2. **Universal Mobile Telecommunications System (UMTS)**：作为3G技术的重要组成部分，UMTS定义了第三代移动通信的标准，为语音和数据服务提供了高速无线接入。 3. **Long-Term Evolution (LTE)**：文档可能详述了LTE技术的最新进展，这是3GPP在2012年发布的4G标准，它显著提升了无线网络的速度和容量，支持移动互联网应用的普及。 4. **Technical Specification Group working methods (3GPP TR 21.900)**：文档强调了标准化组织的工作流程，包括技术规范的制定、审查和更新过程，确保所有参与者遵循统一的标准。 5. **Reference and Revision History**: 提供了文档版本的引用信息和修订历史，便于跟踪技术更新和演变。 6. **Keywords**: GSM（全球系统移动通信），作为2G技术的代表，与LTE和UMTS一同被提及，表明文档可能涉及这些技术之间的兼容性和过渡性策略。 7. **Contact Information**: 文档提供ETSI的联系信息，包括地址、电话和电子邮箱，以便用户获取更多技术支持或参与标准化过程。 8. **Copyright and Usage**: 强调未经ETSI书面许可，不得修改电子或纸质版文档的内容，且在版本差异或印刷差异中，PDF格式的官方文档为准。 ETSI TR 121900 V12.0.0是电信行业的核心参考资料，对于理解3GPP的最新移动通信技术标准、设计、部署和优化无线网络至关重要。对于任何从事移动通信技术、网络运营或标准化工作的人来说，这份文档都是不可或缺的研究资源。

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ETSI

ETSI TR 121 900 V12.0.0 (2014

09)

3GPP TR 21.900 version 12.0.0 Release

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 V12.0.0 (2014

09)

3GPP TR 21.900 version 12.0.0 Release 12

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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ETSI 3GPP TR 21.900 V12.0.0: UMTS, LTE与GSM技术标准概述

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