1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU E.750 (03/2000) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS Quality of service, network management and traffic engineering - Traffic engineering - Mobile networ
2、k traffic engineering Introduction to the E.750 series of Recommendations on traffic engineering aspects of networks supporting personal com m u n i cat ions servi ces ITU-T Recommendation E.750 (Formerly CCITT Recommendation) ITU-T E-SERIES RECOMMENDATIONS OVERALL NETWORK OPERATION, TELEPHONE SERVI
3、CE, SERVICE OPERATION AND HUMAN FACTORS OPERA TION, NUMBERING, ROUTING AND MOBILE SERVICES INTERNATIONAL OPERATION Definitions General provisions concerning Administrations General provisions concerning users Operation of international telephone services Numbering plan of the international telephone
4、 service International routing plan Tones in national signalling systems Maritime mobile service and public land mobile service OPERATIONAL PROVISIONS RELATING TO CHARGING AND ACCOUNTING IN THE INTERNATIONAL TELEPHONE SERVICE Charging in the international telephone service Measuring and recording ca
5、ll durations for accounting purposes UTILIZATION OF THE INTERNATIONAL TELEPHONE NETWORK FOR NON- TE LEP H ONY AP PLI CATI ONS General Phototelegraphy ISDN PROVISIONS CONCERNING USERS QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING NETWORK MANAGEMENT International service statistics In
6、ternational network management Checking the quality of the international telephone service TRAFFIC ENGINEERING Measurement and recording of traffic Forecasting of traffic Determination of the number of circuits in manual operation Determination of the num ber of circuits in automatic and semi-automa
7、tic operation Grade of service Definitions ISDN traffic engineering Mobile network traffic engineering QUALITY OF TELECOMMUNICATION SERVICES: CONCEPTS, MODELS, OBJECTIVES AND DEPENDABILITY PLANNING Terms and definitions related to the quality of telecommunication services Models for telecommunicatio
8、n services Objectives for quality of service and related concepts of telecommunication services Use of quality of service objectives for planning of telecommunication networks Field data collection and evaluation on the performance of equipment, networks and services E. 1 00-E. 103 E.104-E.119 E. 12
9、0-E. 139 E. 140-E. 159 E. 1 60-E. 1 69 E. 170-E. 179 E. 1 80-E. 1 99 E.200-E.229 E.230-E.249 E.260-E.269 E.300-E.319 E.320-E.329 E. 330-E. 399 E.400-E.409 E.41 0-E.419 E.420-E.489 E.490-E.505 E.506-E509 E.510-E519 E.520-E539 E.540-E599 E.600-E.699 E.700-E.749 E.800-E.809 E.810-E.844 E.845-E.859 E.86
10、0-E.879 E.880-E.899 For further details, please rer to ITD-T List of Recommendations. ITU-T RECOMMENDATION E.750 INTRODUCTION TO THE E.750 SERIES OF RECOMMENDATIONS ON TRAFFIC ENGINEERING ASPECTS OF NETWORKS SUPPORTING PERSONAL COMMUNICATIONS SERVICES Summary The E.750 series is intended to cover tr
11、affic engineering aspects related to terminal and personal mobility. This Recommendation outlines the scope and the structure of the E.750 series. Recommendations in the E.750 series are identified by a three-digit number. Recommendations with the third digit in the range O to 4 are either of a gene
12、ral nature or apply to mobile networks; Recommendations with the third digit in the range 5 to 9 normally apply to UPT. Source ITU-T Recommendation E.750 was revised by ITU-T Study Group 2 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on 13 March 2000. Recommendation E.750 (
13、03/2000) 1 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, operating and tariff
14、 questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce R
15、ecommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0
16、 and IEC. 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 The ITU draws attention to the possibility that the practice or implementation of this Re
17、commendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date
18、 of approval of this Recommendation, the 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 information and are therefore strongly urged to cons
19、ult the TSB patent database. o ITU 2000 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing fi-om the ITU. 11 Recommendation E.750 (03/2000) CONTENTS
20、1 1.1 1.2 2 3 4 5 6 Scope . Terminal mobility . Personal mobility Related Recommendations . Abbreviations Introduction . Organization and content of the E.750 series . History . Appendix I . A perspective for progressing traffic engineering for networks supporting I . 1 terminal mobility . 1.2 Traff
21、ic engineering approach Current practices for the operation of cellular systems . Recommendation E.750 (03/2000) Page 1 1 1 2 3 3 4 6 . 111 Recommendation E.750 INTRODUCTION TO THE E.750 SERIES OF RECOMMENDATIONS ON TRAFFIC ENGINEERING ASPECTS OF NETWORKS SUPPORTING PERSONAL COMMUNICATIONS SERVICES
22、(revised in 2000) 1 Scope The E.750 series is intended to cover traffic engineering aspects related to terminal and personal mobility. Terminal mobility involves the ability of the user to be in continuous motion whilst accessing and using telecommunication services and the capability of the network
23、 to keep track of the location of the users terminal. This requires the telecommunication services to be available throughout a spatial volume and ideally at all times. Personal mobility is conferred by flexibility of the users access to telecommunication service provision which is available at any
24、terminal, in such a way that the user identifies with, and may configure any of these terminals, fixed or mobile, to meet the users requirements. These requirements may then be relocated rom terminal to terminal. Personal mobility involves the network capability to locate the user on the basis of a
25、unique personal identity (e.g. UPT number) for the purposes of addressing, routing and charging of the users calls. This Recommendation outlines the scope and the structure of the E.750 series. Recommendations in the E.750 series are identified by a three-digit number. Recommendations with the third
26、 digit in the range O to 4 are either of a general nature or apply to mobile networks; Recommendations with the third digit in the range 5 to 9 normally apply to UPT. 1.1 Terminal mobility The E.750 series of Recommendations focuses initially on circuit switched traffic and common channel signalling
27、 traffic. Packet switched connections are for further study. The series considers the impact of mobile related traffic demands on both radio resources and fixed network resources, i.e. PSTN, ISDN and SS No. 7 networks. This recognizes the use of radio technology as either a separate or integral part
28、 of PSTNhSDN. The Recommendations in the E.750 series are applicable to both existing and emerging public land mobile systems. Examples of second generation digital systems include: GSM (Europe), NADC (North America) and PDC (Japan). IMT-2000 and UMTS represent examples of advanced (third generation
29、) systems which are being specified in the ITU and ETSI, respectively. Teletraffic issues related to intenvorking with B-ISDN (including MANS) are for further study. The E.750 series of Recommendations is also applicable to maritime and aeronautical systems, both terrestrial- and satellite-based. An
30、 example of satellite-based systems are the INMARSAT systems A, Aero, M and B. 1.2 Personal mobility The E.750 series is intended to be phased with the progress of the definition of the UPT service. In particular, the series will initially concentrate on UPT service set 1. Recommendation E.750 (03/2
31、000) 1 2 Related Recommendations The following Recommendations are the ones applicable at the time of publication of this Recommendation. Recommendations related to terminal mobility include: ITU-T Recommendation E.220 (1996), Interconnection of public land mobile networks CCITT Recommendation E.723
32、 ( 1992), Grade-ofservice parameters for Signalling System No. 7 networks. CCITT Recommendation F. 1 1 1 (199 i), Principles of service for mobile systems. ITU-T Recommendation F. 1 15 (1 995), Service objectives and principles for future public land mobile telecommunication systems. ITU-R Recommend
33、ation M.687-2 (1 997), International Mobile Telecommunications-2000 ITU-R Recommendation M.8 16- 1 (1 997), Framework for services supported on International Mobile Telecommunications-2000 (IMT-2000). ITU-R Recommendation M. 1079 (1993), Speech and voiceband data performance requirements for Interna
34、tional Mobile Telecommunications-2000 (IMT-2000). ITU-R Recommendation M. 1 168 (1995), Framework for International Mobile Telecommunications-2000 (IA4T-2000). ITU-R Recommendation M. 1308 (1997), Evolution of land mobile systems towards CCITT Recommendation Q. 1001 (1988), General aspects ofpublic
35、land mobile networks. CCITT Recommendation Q. 1002 (1988), Networkfinctions. CCITT Recommendation Q. 1003 (1 988), Location registration procedures. PLM-N). (IMT-2000). IMT-2000. A comprehensive list of Recommendations related to the overall subject of mobile systems and services is given in Recomme
36、ndation E.20 1 (Reference Recommendation for mobile services). Recommendations related to UPT aspects include: - - ITU-T Recommendation E. 168 (1999), Application of E. 164 numberingplan for UPT. ITU-T Recommendation E. 174 (1995), Routing principles and guidance for Universal Personal Telecommunica
37、tions (UPT). CCITT Recommendation E.723 ( 1992), Grade-ofservice parameters for Signalling System No. 7 networks. ITU-T Recommendation F.85 1 (1995), Universal Personal Telecommunication (UPT) - Service description (service set 1). - CCITT Recommendation 1.3 12/Q. 120 1 (1 992), Principles of intell
38、igent network architecture. ITU-T Recommendation 1.373 (1 993), Network capabilities to support Universal Personal Telecommunication (UPT). - - - 2 Recommendation E.750 (03/2000) Finally, the following Recommendations address traffic modelling: - - - - - CCITT Recommendation E.7 1 1 (1 992), User de
39、mand modelling. CCITT Recommendation E.7 12 (1 992), User plane trafic modelling. CCITT Recommendation E.7 13 (1 992), Control plane trafic modelling. CCITT Recommendation E.720 (1988), ISDNgrade of service concept. ITU-T Recommendation E.72 1 (1 999), Network grade of service parameters and target
40、values for circuit-switched services in the evolving ISDN. 3 Abbreviations This Recommendation uses the following abbreviations: B-ISDN ETSI GSM IMT-2000 IN ISDN MAN NADC PLMN PDC PSTN SS No. 7 UMTS UPT Broadband Integrated Services Digital Network European Telecommunications Standards Institute Glo
41、bal System for Mobile communications International Mobile Telecommunications-2000 Intelligent Network Integrated Services Digital Network Metropolitan Area Network North American Digital Cellular Public Land Mobile Network Personal Digital Cellular Public Switched Telephone Network Signalling System
42、 No. 7 Universal Mobile Telecommunication System Universal Personal Telecommunication 4 Introduction Mobile services are expanding at a very high rate all over the world and mobile related traffic is forecast to represent a significant share of the overall traffic increase in the years to come. A pa
43、rallel increase is also being expected in the radio coverage, with incurred consequences on the fixed network infiastructure. This situation is leading to an impact of mobile related traffic on the fixed network which has to be measured, forecast and appropriately handled, to ensure that it does not
44、 create service impairment. Consideration of mobile traffic characteristics and control, and identification of teletraffic interfaces between mobile and fixed network domain are important problems to be addressed in view of the variety of and the pace at which different architecture and scope for mo
45、bile systems are being proposed worldwide. Other key objectives of the E.750 series relating to terminal mobility are to provide methods for: i) ii) dimensioning radio transmission resources; and partitioning available spectrum among different cell types (e.g. micro- and macrocells) in overlaid cell
46、ular layouts as a result of capacity and coverage considerations. Recommendation E.750 (03/2000) 3 UPT is expected to be introduced initially by making use of the existing technology, hence its potential is estimated high rom its inception. It is recognized that in the long-term UPT will provide a w
47、ide range of services using IN capabilities and may also have a significant wireless access component. In the near-term, however, it is anticipated that the primary focus will be on service-specific architecture solutions (ISDN/PSTN/PLMN) with voice as a priority. UPT performance Recommendations sho
48、uld therefore follow a phased approach taking account of such influencing factors as the increasing wireless access component, the signalling network and IN architecture, and the registratiordauthentication arrangements for access security. 5 Recommendations in the E.750 series are grouped into five
49、 major categories. These are: - General: Recommendations E.750 to E.759. - Traffic modelling: Recommendations E.760 to E.769. - Grade of service: Recommendations E.770 to E.779. - Dimensioning methods: Recommendations E.780 to E.789. - Traffic measurements: Recommendations E.790 to E.799. Figure 1 shows the organization and the development of the E.750 series. One of the objectives of the E.750 series is the characterization of the mobile related traffic, both in the user and in the control plane, at the interface where mobile and fixed networks interconnect. Organization and content of
