1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 10711:2012Intelligent Transport Systems Interface Protocol andMessage Set Definitionbetween Traffic SignalControllers and DetectorsBS ISO 10711:2012 BRITISH STANDARDNation
2、al forewordThis British Standard is the UK implementation of ISO 10711:2012. The UK participation in its preparation was entrusted to T e c h n i c a l Committee EPL/278, Road transport informatics.A list of organizations represented on this committee can be obtained on request to its secretary.This
3、 publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012 ISBN 978 0 580 66614 8 ICS 03.220.01; 35.240.60 Compliance with a British Standard cannot confer immunity from legal obligati
4、ons.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 10711:2012Reference numberISO 10711:2012(E)ISO 2012INTERNATIONAL STANDARD ISO10711First edition2012-01-1
5、5Intelligent Transport Systems Interface Protocol and Message Set Definition between Traffic Signal Controllers and Detectors Systmes intelligents de transport Protocole dinterface et dfinition des ensembles de messages entre rgulateurs de signaux de circulation et dtecteurs BS ISO 10711:2012ISO 107
6、11:2012(E) COPYRIGHT PROTECTED DOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, 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 from either ISO at th
7、e address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2012 All rights reservedBS ISO 10711:2012ISO 10711:2012(E)
8、ISO 2012 All rights reserved iiiContents Page Foreword iv Introduction . v 1 Scope 1 2 Normative references 2 3 Terms and definitions . 2 4 Abbreviated terms . 2 5 Interface protocol for traffic controller 3 5.1 Relationship to other standards 3 5.2 Identification detector index 3 5.3 Detector class
9、ification 4 6 Interface messages for traffic signal controller . 5 6.1 General frame structure 5 6.2 Detector information messages structure 7 Annex A (normative) Interface Protocol Message Set Definition between Traffic Signal Controllers and Detectors data structure and data type definition 16 Ann
10、ex B (informative) Interface Protocol and Message Set Definition between Traffic Signal Controllers and Detectors implementation example . 23 Bibliography 25 BS ISO 10711:2012ISO 10711:2012(E) iv ISO 2012 All rights reservedForeword ISO (the International Organization for Standardization) is a world
11、wide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on t
12、hat committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in
13、 accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard
14、requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 10711 was prepared by Tec
15、hnical Committee ISO/TC 204, Intelligent transport systems. BS ISO 10711:2012ISO 10711:2012(E) ISO 2012 All rights reserved vIntroduction Real-time traffic signal control systems use traffic detectors to obtain traffic flow information. Each detector has its own method for collecting traffic informa
16、tion. Most popular is the loop detector which reports traffic data through detection of vehicle occupancy. Each method supporting different forms of detection has its own merits and disadvantages and uses a variety of message sets and protocols for communication which complicates their integration i
17、nto systems. There are two methods for integrating different types of traffic detectors. One method is to select and/or analyse the necessary information from detectors using their own message sets. The second method is to standardize the message sets and protocols to be used for the interface betwe
18、en detectors and traffic signal controllers. The former has the disadvantage that the signal controller must be customized each time a new detector type is introduced. The latter approach has the advantage of supporting consistent collection of traffic data without consideration of detectors detecti
19、on principles and characteristics. Thus, the second method has advantages when the use of the data is known. This International Standard defines detector message sets applicable to traffic signal control. There are three different message sets according to the detection method: occupancy based; imag
20、e processing based; and vehicle identification based. All detectors should be assigned to one of these three categories. The message sets do not contain hardware information and additional information that is not critical to the traffic signal control. Regardless of their physical functions or manuf
21、acturing methods, all current traffic detectors can use one of the three types of message sets for communicating with traffic controllers. Using this International Standard, there is no need to include specific manufacturers technical codes as a part of the data exchange. This International Standard
22、 allows the signal controller to query and change the detector settings for the commonly applicable contents such as attributes identifying the installed location of the detector. For image processing based detectors, this International Standard includes minimal well-known generic camera control com
23、mands. The encoding rules and lower layers of the OSI communications stack2(e.g. transport) are left to national standards. The benefits are a) all detectors can adopt one of the three types of predefined message sets, thus configuration of traffic detector system for traffic signal control becomes
24、more simple regardless of hardware properties and manufacturing method, b) it is not necessary to replace or revise traffic signal controller software when a new type of detector is installed and a new detector adopting one of the three message sets will not have communications interoperability prob
25、lems, as all of the necessary information items for signal control have been considered, and c) minimizing the communications load achieved with the compact size of predefined information; this advantage can be applicable to short range wireless communication with its weakness in the multi-channel s
26、imultaneous communication owing to hand-shaking and frequency interference. Annex B provides an informative example of how the interface protocol and message sets are implemented. BS ISO 10711:2012BS ISO 10711:2012INTERNATIONAL STANDARD ISO 10711:2012(E) ISO 2012 All rights reserved 1Intelligent Tra
27、nsport Systems Interface Protocol and Message Set Definition between Traffic Signal Controllers and Detectors 1 Scope This International Standard defines protocols and message sets between traffic detectors and traffic signal controllers. It is applicable to the various types of traffic detector tec
28、hnologies currently in use for real-time traffic signal controls. The scope of this International Standard is limited to parameter generation to be used for traffic signal control and for the interface between traffic signal controllers and detectors. This International Standard defines message sets
29、 that contain data collection and control protocol for three different types of detectors of traffic signal control systems: detectors that deal with occupancy information; detectors that deal with image information; detectors that deal with vehicle identification. The scope of this International St
30、andard does not include the following cases: interfaces between sensors including tag or on-board units (OBU) and detector controllers; interfaces between traffic signal controllers and centres; when signal controllers only relay data from field-side detectors to central computers; when signal contr
31、ollers receive unencoded electrical signals from cable-connected detectors and not data from detectors. Physical scope is limited to the communication interface between traffic signal controllers and traffic detectors. The scope does not include the interface between the traffic detector and its own
32、 controller. ImageTag or OBULoopDetectorControllerTrafficcontrollerassemblyFigure 1 Physical scope This International Standard is limited to the definition of the message sets used to exchange detector information relevant for traffic control and the logical rules governing the exchange of these mes
33、sages. BS ISO 10711:2012ISO 10711:2012(E) 2 ISO 2012 All rights reserved2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
34、 document (including any amendments) applies. ISO 15784-3:2008, Intelligent transport systems (ITS) Data exchange involving roadside modules communication Part 3: Application profile-data exchange (AP-DATEX) ISO 14827-2:2005, Transport information and control systems Data interfaces between centres
35、for transport information and control systems Part 2: DATEX-ASN 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 15784-3 and the following apply. 3.1 occupancy based detector detector that detects vehicles and traffic characteristics based on the stat
36、e of the occupancy using methods such as loop or magnetic detectors 3.2 image processing based detector detector that detects vehicles based on the real-time image data from the digital camera which has virtual sensing lines for estimating queue length or other parameters in approaching lanes 3.3 ve
37、hicle identification based detector detector that detects vehicle identities based on wireless communication with tags or on-board units (OBU) in the vehicle, which transmits the vehicles identity information to the traffic signal controller 3.4 detection zone area on the road surface where the targ
38、et or the group of targets actuates the detector NOTE Adapted from DS/ENV 13563. 3.5 detector information type information type that designates the type of information from linked detectors which can be occupancy based, image processing based or vehicle identification based 3.6 direction discriminat
39、ion direction of travel of a target within the detection zone NOTE Adapted from DS/ENV 13563. 4 Abbreviated terms For the purposes of this document, the following abbreviated terms apply. ID Identifier IPMSTSCD Interface Protocol and Message Set Definition between Traffic Signal Controllers and Dete
40、ctorsMIB Management Information Base BS ISO 10711:2012ISO 10711:2012(E) ISO 2012 All rights reserved 3OBU On-Board Unit OSI Open System Interconnection PDU Protocol Data Unit RSE Roadside Equipment 5 4BInterface protocol for traffic controller 5.1 6BRelationship to other standards For the interface,
41、 this International Standard defines for each application the scope of the 1) framework in the protocol stack, 2) object encoding rules, and 3) transportation management protocol. The interface defined within this International Standard secures interoperability by adopting the lower layer of the pro
42、tocol stack and specified standards for encoding rules, transport management rules and data structures. The criteria for detector controller and traffic signal controller define the designating method for the detectors. The information should be exchanged according to the protocol profile defined in
43、 ISO 15784-3 and ISO 14827-2. 5.2 7BIdentification detector index 5.2.1 11BIdentification method A traffic signal controller collects data from each connected detector controller using the message sets defined in this International Standard. Each detector controller reports information about its det
44、ectors, with each detector identified by a unique sequential identifier. However, since the traffic signal controller may be connected to multiple detector controllers, the traffic signal controller shall, where required, support a cross-reference table that translates the local detector identifier
45、into an identifier that is unique for the entire scope of the traffic signal operation, as shown in Figure 2. Image TypeID TypeTafficSignalControllerdetectorcontrollerindex numbersdetector index numbersof detector controllerlogical detector index numbersof signal controller57wirelessdevice12detector
46、 indexcross reference tableLoopTypeLoopTypeLoopType68912123Figure 2 Detector identification concept (example) BS ISO 10711:2012ISO 10711:2012(E) 4 ISO 2012 All rights reservedIf and when the traffic signal controller transmits detector data to a higher level system (outside of the scope of this Inte
47、rnational Standard), it should use the derived detector ID that is unique within the full scope of the traffic signal operation. 5.2.2 12BRequest and response The protocol of this International Standard supports event-driven, request-response and periodic data exchange methods. 5.3 8BDetector classi
48、fication 5.3.1 13BManaging multi-detector environments The protocol supports the ability for a traffic signal controller to communicate with multiple detector controllers. In such a model, the traffic signal controller does not receive a constant analogue stream, but rather receives packets of data
49、that managed on a cyclical basis. 5.3.2 14BOccupancy based detector An occupancy based detector controller is able to report occupancy rate and vehicle speed to the traffic signal control system by determining the percent of time the sensor is detecting a vehicle. The information is used for calculating signal phases. However, if an occupancy based detector on the roadway has its own digital communication capability, then it can be regarded as a detector controller. These detector controllers are then linked
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