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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO/IEC TR 13243:1999
2、ICS 35.100.05 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Information technology Quality of service Guide to methods and mechanisms Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been
3、 prepared under the direction of the DISC Board , was published under the authority of the Standards Committee and comes into effect on 15 July 2000 BSI 07-2000 ISBN 0 580 34313 8 BS ISO/IEC TR 13243:1999 Amendments issued since publication Amd. No.DateComments National foreword This British Standar
4、d reproduces verbatim ISO/IEC TR 13243:1999 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee IST/6, Data communications, which has the responsibility to: aid enquirers to understand the text; present to the responsible intern
5、ational/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its
6、secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standard
7、s Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages
8、This document comprises a front cover, an inside front cover, the ISO/IEC TR title page, pages ii to v, a blank page, pages 1 to 28, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun shef
9、fieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO/IEC TR 13243:1999(E) TECHNICAL REPORT ISO/IEC TR 13243 First edition 1999-11-01 Information technology Quality of service Guide to methods and mechanisms Technologies de linformation Qualit du service Gu
10、ide pour les mthodes et les mcanismes Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC TR 13243:1999(E) ii? Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC TR 13243:19
11、99(E) ?iii Contents Page 1 Scope 1 2 Normative references 1 2.1 Identical Recommendations | International Standards. 2 3 Definitions 2 3.1 QoS Framework definitions 2 3.2 ODP definitions. 2 4 Abbreviations . 3 5 References to QoS from Recommendations, International Standards and other specifications
12、. 3 5.1 QoS in collaborative ITU-T Recommendations and ISO/IEC International Standards 3 5.2 QoS in ISO/IEC International Standardized Profiles 8 5.3 QoS in ISO TC 184 standards. 8 5.4 QoS in ITU-T Recommendations 8 5.5 QoS in specifications produced by other organizations 9 5.6 Research on QoS mana
13、gement 10 6 Methods and mechanisms for the prediction phase 10 7 Methods and mechanisms for the establishment phase 10 7.1 Methods of reaching QoS agreements. 10 7.2 Resource allocation mechanisms. 22 7.3 Initialization mechanisms 22 8 Methods and mechanisms for the operational phase 22 8.1 Monitori
14、ng mechanisms 22 8.2 Maintenance mechanisms 23 8.3 Filters. 24 8.4 Enquiry mechanisms . 25 8.5 Alert mechanisms 25 9 QoS verification methods. 26 9.1 Introduction. 26 9.2 QoS verification at the design stage 26 9.3 QoS verification at the testing stage 27 9.4 QoS verification at the operation stage
15、. 28 10 References to this Recommendation | Technical Report 28 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC TR 13243:1999(E) iv? Foreword ISO (the International Organization for Standardization) and IEC (the International Electro
16、technical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technica
17、l activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. International Standards are drafted in accordance with the rules given in the ISO/IEC
18、Directives, Part 3. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires
19、approval by at least 75 % of the national bodies casting a vote. In exceptional circumstances, when a technical committee has collected data of a different kind from that which is normally published as an International Standard (“state of the art“, for example), it may decide by a simple majority vo
20、te of its participating members to publish a Technical Report. A Technical Report is entirely informative in nature and does not have to be reviewed until the data it provides are considered to be no longer valid or useful. Attention is drawn to the possibility that some of the elements of this Tech
21、nical Report may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC TR 13242waspreparedbyJointTechnicalCommitteeISO/IEC JTC 1,Informationtechnology, Subcommittee SC 6,Telecommunications and information exchange between sy
22、stems, in collaboration with ITU-T. The identical text is published as ITU-T Rec. X.642. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC TR 13243:1999(E) ?v Introduction This Recommendation | Technical Report is intended to promote t
23、he use of common methods and mechanisms for managing Quality of Service (QoS) in a number of different communications and systems environments. The collaborative ITU-T and ISO/IEC JTC 1 project for coordination and harmonization of QoS-related initiatives is aimed at encouraging the use of the QoS F
24、ramework (see ITU-T Rec. X.641 | ISO/IEC 13236), facilitating the use of common QoS methods and mechanisms, and promoting consistency between different applications and systems in their treatment of QoS. The collaboration has been extended to include QoS in Open Distributed Processing. Efforts are b
25、eing made to promote maximum consistency between this activity and the work on development of specifications for QoS in CORBA-based systems in the Object Management Group (OMG). Organizations developing methods or mechanisms for QoS management are encouraged to make use of the concepts and terms def
26、ined in the QoS Framework. Any developments that may be re-usable in other contexts should also be proposed for reference in this Recommendation | Technical Report by submitting a reference, together with explanatory text, to the ITU-T or JTC 1 Secretariat. It is expected that the convergence of QoS
27、 methods and mechanisms will be achieved in a stepwise fashion, using such submitted material as a basis. In its first edition, this Recommendation | Technical Report identifies and catalogues current standards and other widely available specifications that incorporate definitions of QoS characteris
28、tics and QoS methods and mechanisms; and it includes definitions of some methods and mechanisms that are considered to be widely applicable. These methods and mechanisms are derived from those used or under development in information technology standards, and have been formulated in a manner consist
29、ent with the QoS Framework, with the objective that they can be applied widely and, if appropriate, standardized. Subsequent editions of this Recommendation | Technical Report are expected to add further methods and mechanisms, likewise formulated in a manner consistent with the QoS Framework. Throu
30、gh this process, harmonization of QoS approaches and usage across a wide range of environments will be achieved. Since this Recommendation | Technical Report includes methods and mechanisms developed elsewhere, in cases of conflict between definitions in this Recommendation | Technical Report and de
31、finitions in the source specifications, the latter have precedence. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC TR 13243 :
32、 1999 (E) ITU-T Rec. X.642 (1998 E)1 TECHNICAL REPORT ISO/IEC TR 13243 : 1999 (E) ITU-T Rec. X.642 (1998 E) ITU-T RECOMMENDATION INFORMATION TECHNOLOGY QUALITY OF SERVICE GUIDE TO METHODS AND MECHANISMS 1Scope This Recommendation | Technical Report uses the concepts and terminology of the Quality of
33、 Service Framework, ITU-T Rec. X.641 | ISO/IEC 13236. It is intended to support those designing, testing and specifying Information Technology (IT) systems, data communications services and protocols, those defining QoS management functions and QoS mechanisms for particular data environments and tec
34、hnologies, and those engaged in other QoS-related activities such as system testing, by providing a source of reference material on QoS. To do this, it brings together references to methods and mechanisms from a variety of sources, and in some cases documents them in a style which will permit their
35、use in many data different environments. The term “method“ is used in a very general sense to include any process, function, etc., that is relevant to QoS at any stage in the life-cycle of a system. The criterion for reference to or inclusion of definitions or specifications of QoS methods and mecha
36、nisms in this Recommendation | Technical Report is that they are thought to be of potentially wider application than solely the environment for which they were originally developed, although still in a data context. Clause 5 identifies sources of definitions of QoS characteristics and related inform
37、ation. Clauses 6, 7 and 8 discuss methods and mechanisms appropriate to the phases of QoS activity that are defined in the QoS Framework: clause 6 deals with the prediction phase, clause 7 with the establishment phase and clause 8 with the operational phase. Clause 9 describes methods for verificati
38、on of system behaviour related to QoS. Clause 10 covers the relationships between this Recommendation | Technical Report and Recommendations, International Standards or Technical Reports that reference it. This Recommendation | Technical Report contains detailed definitions of some QoS mechanisms. S
39、ome peer-to-peer QoS negotiation mechanisms are defined in 7.1.1. These involve two peer entities and in most cases also the provider of a communications service between them. Subclause 7.1.2 provides an initial specification of some QoS negotiation mechanisms for 1 N multicast connections, based on
40、 those in 7.1.1. Subclause 7.1.3 discusses QoS negotiation mechanisms for M N multicast, some of which can make use of those in 7.1.2. Subclause 8.2.1 defines some QoS management mechanisms to support time-critical applications. This Recommendation | Technical Report does not include methods and mec
41、hanisms for security. 2Normative references The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provisions of this Recommendation | Technical Report. At the time of publication, the editions indicated were valid. All Recommen
42、dations and Standards are subject to revision, and parties to agreements based on this Recommendation | Technical Report are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of c
43、urrently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently valid ITU-T Recommendations. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC TR 13243 : 1999 (E) 2ITU-T Rec
44、. X.642 (1998 E) 2.1Identical Recommendations | International Standards ITU-T Recommendation X.641 (1997) | ISO/IEC 13236:1998, Information technology Quality of Service: Framework. ITU-T Recommendation X.902 (1995) | ISO/IEC 10746-2:1996, Information technology Open distributed processing Reference
45、 Model: Foundations. 3Definitions For the purposes of this Recommendation | Technical Report, the following definitions apply. 3.1QoS Framework definitions This Recommendation | Technical Report uses the following terms drawn from the Quality of Service Framework, ITU-T Rec. X.641 | ISO/IEC 13236: c
46、ompulsory (level of agreement); connection-wide (negotiation); controlled highest quality; establishment phase; guaranteed (level of agreement); highest quality attainable; lowest quality acceptable; operating target; operational phase; prediction phase; QoS alert; QoS characteristic; QoS enquiry; Q
47、oS filter; QoS maintenance; QoS measure; QoS mechanism; QoS monitoring; QoS negotiation; QoS parameter; QoS threshold; QoS verification; receiver-selected (negotiation). 3.2ODP definitions This Recommendation | Technical Report uses the following term drawn from the Reference Model of Open Distribut
48、ed Processing: Foundations, ITU-T Rec. X.902 | ISO/IEC 10746-2: Quality of Service (QoS): A set of qualities related to the collective behaviour of one or more objects. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:58:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO/IEC TR 13243 : 1999
49、(E) ITU-T Rec. X.642 (1998 E)3 4Abbreviations For the purposes of this Recommendation | Technical Report, the following abbreviations apply: AGIActive Group Identity CHQControlled Highest Quality CORBACommon Object Request Broker Architecture CWConnection-Wide (negotiation) FDTFormal Description Technique HQAHighest Quality Attainable LQALowest Quality Acceptable ODPOpen Distributed Processing OMGObject Management Group PCO packet-switched networks (e.g. those conforming to the ITU-T Rec. X.25); local and metropolitan area n