3GPP TR 21.900: 移动通讯技术标准

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"ETSI TR 121900V7.1.0(2005-09)" 是一份由欧洲电信标准化协会(ETSI)发布的技术报告，专注于移动通信系统，特别是3GPP（第三代合作伙伴计划）的工作方法和技术规范。这份报告涵盖了数字蜂窝通信系统(Phase 2+)以及通用移动通信系统(UMTS)的相关内容。其目的是为了定义和标准化全球系统用于移动通信(GSM)和UMTS的技术细节。在3GPP TR 21.900版本7.1.0 Release 7中，主要讨论了以下几个关键知识点： 1. **3GPP工作方法**：此报告详细阐述了3GPP技术规范组(TSG)的工作流程和协作机制，包括标准制定、提案评估、技术讨论和决策过程。这些方法确保了全球范围内3G移动通信系统的互操作性和一致性。 2. **GSM与UMTS**：GSM（Global System for Mobile Communications）是第二代(2G)移动通信标准，而UMTS（Universal Mobile Telecommunications System）是3G标准，它们在ETSI的指导下进行了升级和扩展。UMTS引入了更高的数据传输速率和更先进的网络架构，为用户提供更好的语音和数据服务。 3. **技术规范**：报告详细列出了UMTS的技术规范，包括空中接口标准、网络架构、信号处理、频谱分配以及服务质量(QoS)等。这些规范确保了UMTS设备之间的兼容性，促进了全球移动通信市场的快速发展。 4. **Release 7**：这个版本的发布代表了3GPP技术的一个重要里程碑，它可能包含了对UMTS网络的增强功能，如更高的数据速率、更高效的资源管理、新的无线接入技术(RAT)改进等。 5. **参考文献与关键词**：报告引用了“RTR/TSGS-0021900v710”，这可能是其他相关技术文档的标识，关键词“GSM”和“UMTS”则突出了报告的核心内容。 6. **电子版本与打印版本一致性**：ETSI强调，尽管报告可能有多个电子版本，但以PDF格式存储在特定网络驱动器上的打印版本作为争议解决时的参考版本。 7. **获取途径**：ETSI允许用户从其官方网站下载该报告的个人副本，以促进标准的广泛传播和应用。这份报告对于理解3G通信系统的标准制定过程、技术规范及其演进历程具有重要意义，同时也为相关行业的研发人员、工程师和政策制定者提供了宝贵的参考资料。

ETSI

TSI TR 121 900 V7.1.0 (2005

3GPP TR 21.900 version 7.1.0 Release 7

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

TSI TR 121 900 V7.1.0 (2005

3GPP TR 21.900 version 7.1.0 Release 7

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

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.

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