ITU-T G 1010-2001 End-User Multimedia QoS Categories Series G Transmission Systems and Media Digital Systems and Networks Quality of Service and Performance (Study Group 12)《终端用户多媒.pdf
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1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.1010 (I 1/2001) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Quality of service and performance - End-user multimedia QoS categories ITU-T Recommendation G. 1 O1 O INTERNATIONAL TE
2、LECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.1010 (I 1/2001) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Quality of service and performance End-user multimedia QoS categories ITU-T Recommendation G. 1 O1 O ITU-T G-SERIES RECOMMENDATIONS TRA
3、NSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS TRANSMISSION SYSTEMS INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES GENERAL CHARACTERISTICS OF INTERNATIONAL CARRER TELEPHONE METALLIC LINES COORDINATiO
4、N OF RADIOTELEPHONY AND LINE TELEPHONY TESTING EQUIPMENTS TRANSMISSION MEDIA CHARACTERISTICS DIGITAL TERMINAL EQUIPMENTS DIGITAL NETWORKS DIGITAL SECTIONS AND DIGITAL LINE SYSTEM GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRER- SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH
5、 UALITFOF SERVICE AND PERFMAc II TRANSMISSION MEDIA CHARACTERISCTICS G. 100-G. 199 G.200-G.299 G.300-G.399 G.400-G.449 G.450-G.499 G.500-G.599 G.600-G. 699 G.700-G.799 G.800-G. 899 G.900-G.999 /I DIGITAL TERMINAL EQUIPMENTS G.7000-G.7999 I For further details, please refer to the list of ITU-T Recom
6、mendations. ITU-T Recommendation G.1010 End-user multimedia QoS categories Summary This Recommendation defines a model for multimedia Quality of Service (QoS) categories fiom an end-user viewpoint. By considering user expectations for a range of multimedia applications, eight distinct categories are
7、 identified, based on tolerance to information loss and delay. It is intended that these categories form the basis for defining realistic QoS classes for underlying transport networks, and associated QoS control mechanisms. Source ITU-T Recommendation G. 10 1 O was prepared by ITU-T Study Group 12 (
8、200 1-2004) and approved under the WTSA Resolution 1 procedure on 29 November 200 1. ITU-T Rec. 6.1010 (11/2001) i FOREWORD The International Telecommunication Union (IT) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (IT
9、U-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four
10、years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within IT-Ts purview, the ne
11、cessary standards are prepared on a collaborative basis with IS0 and EC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS IT draws attention to the
12、possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Propem Right. IT takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the
13、 Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest infor
14、mation and are therefore strongly urged to consult the TSB patent database. o ITU 2002 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. G.lO1O (11/2001) 11 CONTENTS 1 2 3 4 4.1 4.2 4.3 5 5.1 5.2 5.3 5
15、.4 6 Scope References User-driven performance requirements Delay . Delay variation . Information loss Key parameters impacting the user Performance considerations for different applications . Audio 5.1.1 Conversational voice . 5.1.2 Voice messaging . 5.1.3 Streaming audio . Video 5.2.1 Videophone .
16、5.2.2 One-way video 5.3.1 Web-browsing . High-priority transaction services (E-commerce) . Data . 5.3.2 Bulk data . 5.3.3 5.3.4 Commandcontrol 5.3.5 Still image . 5.3.6 Interactive games . 5.3.8 E-mail (server access) . 5.3.9 Instant messaging Background applications Low priority transaction service
17、s 5.3.7 Telnet . 5.4.1 Fax . 5.4.2 5.4.3 Email (server-to-server) 5.4.4 Usenet Classification of performance requirements into end-user Quality of Service categories Appendix I . Performance targets . Appendix II . Bibliography . Page 1 1 1 2 2 2 2 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 8 10 . IT
18、U-T Rec . 6.1010 (11/2001) 111 ITU-T Recommendation 6.1010 End-user multimedia QoS categories 1 Scope The intent of this Recommendation is to provide guidance on the key factors that influence Quality of Service (QoS) from the perspective of the end-user. By considering a range of applications invol
19、ving the media of voice, video, image and text, and the parameters that govern end-user satisfaction for these applications, a broad classification of end-user QoS categories is determined. It is intended that these categories be used as the basis for deriving realistic QoS classes and associated Qo
20、S control mechanisms for the underlying transport networks. 2 References The following ITU-T Recommendations and other references contain provisions, which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. Al
21、l Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is re
22、gularly published. NOTE - The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. 11 ITU-T Recommendation F.700 (2000), Framework Recommendation for multimedia services. 2 3 4 ITU-T Recommendation G. 13 1 (1 996), Control of
23、 talker echo. ITU-T Recommendation G. 114 (2000), One-way transmission time. ETSI TS 1 O 1329-2 (ZOOZ), Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Release 3; End-to-end Quality of Service in TIPHON Systems; Part 2: DeJinition of speech Qualiy of Service (QoS) class
24、es. 3 User-driven performance requirements A major challenge for emerging wireline and wireless IP-based networks is to provide adequate Quality of Service (QoS) for different services. To do this requires a detailed knowledge of the performance requirements for particular services and applications.
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