3GPP TR 21.900 V10.0.0: ETSI UMTS, GSM & LTE技术规范

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ETSI（欧洲电信标准化协会）是全球移动通信技术标准制定的重要机构，特别是在3GPP（第三代合作伙伴计划）框架内。TR_121900V100000P.pdf文件是ETSI发布的一份技术报告，于2011年4月更新至第10.0.0版，专注于数字蜂窝电话通信系统（Phase2+），特别是针对UMTS（通用移动通信系统）和LTE（长期演进）的技术规格。这份文档详细探讨了TSG（技术规范组）的工作方法，属于3GPP TR 21.900版本10.0.0，对应的是Release 10。报告的主题涵盖了GSM（全球系统移动通信）与UMTS、LTE之间的技术衔接和标准化过程。关键词的提及，反映了这些技术之间的紧密联系和互操作性。报告的发布方为ETSI总部位于法国索菲亚安提波利斯的地址，用户可以通过官方网站http://www.etsi.org下载个人副本。值得注意的是，如果存在电子版本的差异，以PDF格式的打印版在ETSI秘书处特定网络驱动器上保存的为准，具有法律效力。对于文档的使用者，他们应当遵循ETSI的规定和指南。通过这份技术报告，读者可以了解到当时的UMTS和LTE技术的最新进展，包括网络架构、频谱利用率、数据传输速率、以及可能的标准化解决方案。它不仅对移动通信工程师和标准制定者来说是一份重要的参考资料，也为运营商、设备制造商和服务提供商提供了技术参考和指导，推动了移动通信行业的技术创新和发展。

ETSI

ETSI TR 121 900 V10.0.0 (2011

04)

3GPP TR 21.900 version 10.0.0 Release 10

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 V10.0.0 (2011

04)

3GPP TR 21.900 vers

ion 10.0.0 Release 10

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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3GPP TR 21.900 V10.0.0: ETSI UMTS, GSM & LTE技术规范

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