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1、DRAFT FOR DEVELOPMENT DD CEN/TS 14821-7:2003 Traffic and Travel Information (TTI) TTI messages via cellular networks Part 7: Performance requirements for onboard positioning ICS 35.240.60 ? Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:05:22 GMT+00:00 2006,
2、 Uncontrolled Copy, (c) BSI DD CEN/TS 14821-7:2003 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 8 July 2003 BSI 8 July 2003 ISBN 0 580 42222 4 National foreword This Draft for Development is the official English language version of CE
3、N/TS 14821-7:2003. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because technology in this area is rapidly evolving. It should be applied on this provisional basis, so that informat
4、ion and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion to a European standard. A review of this publication will be in
5、itiated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its 3-year life. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies receiv
6、ed by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent in writing to the Secretary of BSI Technical Committee EPL/278, Road
7、transport informatics, at British Standards House, 389 Chiswick High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an appropriate revision of the text. A list of organizations represented on this committee can be obtained on request to its secret
8、ary. Cross-references The British Standards which implement European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British
9、Standards Online. Summary of pages This document comprises a front cover, an inside front cover, the CEN/TS title page, pages 2 to 32, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publica
10、tion Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:05:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 14821-7 May 2003 ICS 35.240.60 English version Traffic a
11、nd Travel Information (TTI) - TTI messages via cellular networks - Part 7: Performance requirements for onboard positioning This Technical Specification (CEN/TS) was approved by CEN on 10 May 2001 for provisional application. The period of validity of this CEN/TS is limited initially to three years.
12、 After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available.
13、It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germa
14、ny, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050
15、Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 14821-7:2003 E Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:05:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14821-
16、7:2003 2 Table of contents PAGE TABLE OF CONTENTS2 FOREWORD3 INTRODUCTION4 1.SCOPE5 2.NORMATIVE REFERENCES6 3.DEFINITIONS AND ABBREVIATIONS6 3.1Definitions6 3.2Abbreviations9 4.MINIMUM ONBOARD POSITIONING PERFORMANCE REQUIREMENTS FOR TRAFFIC TELEMATICS TERMINAL DEVICES14 4.1Introduction14 4.2Require
17、d Positioning Performance14 4.3Diagnostics Interface19 4.4Quality Verification Method20 5.PREPARATION OF EXTENDED LOCATION22 5.1Introduction22 5.2Requirements / References22 5.3Incoming data22 5.4Outgoing data23 5.5Generating a chain of elements23 ANNEX A.(INFORMATIVE) EXAMPLES29 BIBLIOGRAPHY32 Lice
18、nsed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:05:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14821-7:2003 3 Foreword This document (CEN/TS 14821-7:2003) has been prepared by Technical Committee CEN/TC 278“ Road transport and traffic telematics “, the s
19、ecretariat of which is held by NEN, in collaboration with Technical Committee ISO/TC 204 “ Transport information and control systems “. This CEN/TS was prepared by Working Group 7 of CEN TC278. In the field of Traffic and Traveller Information, the innovative rate is high, with many research and dev
20、elopment projects under way in many countries, and there is a need to establish prospective standards which allow manufacturers to introduce competitive products to the market in the knowledge that they can accommodate the future issues of the standard(s) without fundamental change to equipment. No
21、known national technical specificationss (identical or conflicting) exist on this subject. CEN/TS 14821 consists of eight parts; one part describing the framework and seven parts providing detailed specifications of all components, protocols and services that are within the scope of CEN/TS 14821. Ac
22、cording to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this CEN Technical Specification: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, N
23、etherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:05:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14821-7:2003 4 Introduction Traffic and Traveller Information (T
24、TI) may be disseminated through a number of services or means of communication, covering static displays, portable terminals and in-vehicle equipment. For all such services, the data to be disseminated, and the message structure involved in the various interfaces, require clear definition and standa
25、rds formats in order to allow competitive products to operate with any received data. This CEN/TS focuses on an application data specification whereby data is produced at a central location and is disseminated via a cellular radio network. It addresses the data specifications for both downlink and u
26、plink existing between a central location and randomly located vehicles. It enables messages to be exchanged between different systems and service providers adopting a variety of applications specifications. Other technical specifications are being produced by the CEN TC278 Working Group 4 to cover
27、TTI dissemination via other means or services. This set of specifications is named GATS (Global Automotive Telematics Standard). GATS provides the modular framework for implementing such traffic telematics services on an open technology platform and is network - independent. In many details definiti
28、ons are necessary to ensure interoperability. Therefore, those detailed definitions are given in a network-specific part (CEN/TS 14821-8). With the development of future mobile communication systems towards UMTS / IMT2000 the bottleneck of narrow-band data communication might fade. Due to its modula
29、r structure, the GATS framework and applications are prepared for that due to its network-independence. The same holds for emerging technologies for positioning which today is almost exclusively based on GPS. Other relevant standard developments are, independent from telematics, the application-inde
30、pendent Wireless Application Protocol (WAP), enabling mobile access to the Internet. It is understood that these emerging technologies might fit into the framework of telematics applications in future WAP-versions. For the time being, GATS already today independently from WAP enables access to telem
31、atics services. Utilisation of GATS on a WAP protocol stack and identifying necessary adaptation of WAP specifications (if any) is currently under investigation of the appropriate groups within WAP-Forum and GATS-Forum. Licensed Copy: London South Bank University, London South Bank University, Sat D
32、ec 09 04:05:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14821-7:2003 5 1. Scope This CEN/TS defines the specific interfaces and functionality of traffic telematics (TT) services based on the use of cellular networks. Device manufacturers are enabled to develop terminal equipment compatible
33、to services based on this CEN/TS. This will allow for interoperability of different terminal equipment and service providers which allows competition between service providers and terminal manufacturers. Furthermore it sets the scene for international availability of these services. This CEN/TS spec
34、ifies TT-specific interfaces between terminal and service centre. This especially incorporates the message sets of the application data protocols and the service-independent communication handling (including conditional access and transport protocols). Functionality, procedures and requirements of b
35、asic terminal components as well as their interaction with the service centre. This especially comprises conditional access and security mechanisms. Service Specifications, which are essential to ensure consistent behaviour of terminal and service centre. The services incorporated within this issue
36、comprise: breakdown and emergency services interactive traffic information services broadcast traffic information services navigation services (route assistance, route advice, homing) operator services general information services floating car data collection It is envisaged that future research and
37、 development will lead to improvements on the services listed above as well as to the creation of new services. Nevertheless this CEN/TS provides the framework for seamless integration of new features and services into the existing architecture. Licensed Copy: London South Bank University, London So
38、uth Bank University, Sat Dec 09 04:05:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14821-7:2003 6 2. Normative references Not applicable 3. Definitions and abbreviations 3.1 Definitions For the purpose of this CEN/TS, the following definitions apply: 3.1.1 Accuracy The ability of the positio
39、ning module to maintain the value of a specified parameter within an error limit with a specified probability. 3.1.2 Attribute (of a Traffic Information Message) A Traffic Information Message is made up of separate parts that can be called attributes. This includes, for example, an item of informati
40、on and a length of validity. 3.1.3 Authorisation Reciprocal proof that the identity provided by the communications partner is valid 3.1.4 Availability The ability of the total system to provide the required guidance at the initiation of the intended operation. It is evaluated by determining the prob
41、ability that the system starts up providing the required positioning information at the initiation of each test ride. 3.1.5 Broadcast Service Data service within a cellular wireless network that allows for mono-directional dissemination of data from a service centre to multiple users in the area of
42、signal reception 3.1.6 Bypass Description Representation of a Bypass, consisting of a Bypass Hint and/or a Bypass Route. 3.1.7 Bypass Hint Representation of a hint for a Bypass 3.1.8 Bypass Link Prominent waypoints on a Bypass Route 3.1.9 Bypass Route Representation of the route for a Bypass 3.1.10
43、Cell Broadcast Broadcast service of the GSM network Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:05:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14821-7:2003 7 3.1.11 Continuity The ability of the total system to perform its function with the requi
44、red performance without interruption during the intended operation. It is evaluated by determining the probability that the system provides the required positioning information without interruption during the duration of each test ride. 3.1.12 Coverage Relates to the physical boundaries within which
45、 the positioning module must be able to provide its information with the required performance. 3.1.13 Data telegram Digital message exchanged between two systems 3.1.14 Delivery Notification Network acknowledgement for successful/ unsuccessful delivery of a message to the mobile device 3.1.15 Functi
46、onal Road Class A classification based on the importance of the road element in the connectivity of the total road network 3.1.16 Functional Road Class 0 Motorways 3.1.17 Functional Road Class 1 All non-Motorways that are part of a connection used for nation wide traffic and transport 3.1.18 Geocode
47、 Geocodes are unique identifiers unmistakably defining important points on road networks. Geocodes can be derived from / converted into WGS84 co-ordinates by the algorithm described in CEN/TS 14821-3. 3.1.19 Hardware service agents Partner companies of the traffic telematics service providers who ar
48、e authorised to install onboard equipment into vehicles and to maintain it 3.1.20 Homing Simple form of guidance to destination, in which the direction and straight-line distance of the destination are indicated 3.1.21 Information Element Information unit of a message 3.1.22 Integrity The quality wh
49、ich relates to the trust which can be placed in the correctness of the information supplied by the positioning module. It is specified in terms of the probability that the required performance parameters are not degraded by an undetected failure. Therefore, integrity includes the provision of an error estimation for specific parameters. The estimated errors must be maintained within certain limits with specified probabilities (Probability of Missed Detection, PMD; Probability of False A