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 DD CEN/TS 14821-7:2003 This Draft for Development was published under the authority of the Standards Policy and
2、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 CEN/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 p
3、ublications and is of a provisional nature because technology in this area is rapidly evolving. It should be applied on this provisional basis, so that information and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested s
4、o 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 initiated 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 li
5、fe. 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 received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European standard, to
6、 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 transport informatics, at British Standards House, 389 Chiswick High Road, London W4 4AL, giving the document reference and clause number an
7、d proposing, where possible, an appropriate revision of the text. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement European publications referred to in this document may be found in the BSI Catal
8、ogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British 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 in
9、side back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsTECHNICALSPECIFICATION SPCIFICATIONTECHNIQUE TECHNISCHESPEZIFIKATION CEN/TS148217 May2003 ICS35.240.60 Englishver
10、sion TrafficandTravelInformation(TTI)TTImessagesviacellular networksPart7:Performancerequirementsforonboard positioning ThisTechnicalSpecification(CEN/TS)wasapprovedbyCENon10May2001forprovisionalapplication. TheperiodofvalidityofthisCEN/TSislimitedinitiallytothreeyears.AftertwoyearsthemembersofCENwi
11、llberequested tosubmittheir comments,particularlyonthequestionwhethertheCEN/TScanbeconvertedintoaEuropeanStandard. CENmembersarerequiredtoannouncetheexistenceofthisCEN/TSinthesamewayasforanENandtomaketheCEN/TSavailable .It ispermissibletokeepconflictingnationalstandardsinforce(inparalleltotheCEN/TS)
12、untilthefinaldecisionaboutthep ossible conversionoftheCEN/TSintoanENisreached. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand
13、Un ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.CEN/TS148217:2003ECEN/TS148217:2003 2 Table
14、ofcontents PAGE TABLEOFCONTENTS 2 FOREWORD 3 INTRODUCTION 4 1. SCOPE 5 2. NORMATIVEREFERENCES 6 3. DEFINITIONSANDABBREVIATIONS 6 3.1 Definitions 6 3.2 Abbreviations 9 4. MINIMUMONBOARDPOSITIONINGPERFORMANCEREQUIREMENTSFORTRAFFIC TELEMATICSTERMINALDEVICES 14 4.1 Introduction 14 4.2 RequiredPositionin
15、gPerformance 14 4.3 DiagnosticsInterface 19 4.4 QualityVerificationMethod 20 5. PREPARATIONOFEXTENDEDLOCATION 22 5.1 Introduction 22 5.2 Requirements/References 22 5.3 Incomingdata 22 5.4 Outgoingdata 23 5.5 Generatingachainofelements 23 ANNEXA. (INFORMATIVE) EXAMPLES 29 BIBLIOGRAPHY 32CEN/TS148217:
16、2003 3 Foreword Thisdocument(CEN/TS148217:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC278“Road transportandtraffictelematics“,thesecretariatofwhichisheldbyNEN , incollaborationwithTechnical CommitteeISO/TC204“Transportinformationandcontrolsystems“. ThisCEN/TSwaspreparedbyWorkingGroup7ofCENTC278.In
17、thefieldofTrafficandTraveller Information,theinnovativerateishigh,withmanyresearchanddevelopmentprojectsunderwayinmany countries,andthereisaneedtoestablishprospectivestandardswhichallowmanufacturerstointroduce competitiveproductstothemarketintheknowledgethattheycanaccommodatethefutureissuesofthe sta
18、ndard(s)withoutfundamentalchangetoequipment. Noknownnationaltechnicalspecificationss(identicalorconflicting)existonthissubject. CEN/TS14821consistsofeightparts;onepartdescribingtheframeworkandsevenpartsprovidingdetailed specificationsofallcomponents,protocolsandservicesthatarewithinthescopeofCEN/TS1
19、4821. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoannouncethisCENTechnicalSpecification:Austria,Belgium,CzechRepublic, Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta, Netherlands,Norway,Portugal
20、,Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.CEN/TS148217:2003 4 Introduction TrafficandTravellerInformation(TTI)maybedisseminatedthroughanumberofservicesormeansof communication,coveringstaticdisplays,portableterminalsandinvehicleequipment. Forallsuchservices,thedatatobedisseminated,andthem
21、essagestructureinvolvedinthevarious interfaces,requirecleardefinitionandstandardsformatsinordertoallowcompetitiveproductstooperate withanyreceiveddata. ThisCEN/TSfocusesonanapplicationdataspecificationwherebydataisproducedatacentrallocationand isdisseminatedviaacellularradionetwork.Itaddressesthedat
22、aspecificationsforbothdownlinkanduplink existingbetweenacentrallocationandrandomlylocatedvehicles.Itenablesmessagestobeexchanged betweendifferentsystemsandserviceprovidersadoptingavarietyofapplicationsspecifications. OthertechnicalspecificationsarebeingproducedbytheCENTC278WorkingGroup4tocoverTTI di
23、sseminationviaothermeansorservices.ThissetofspecificationsisnamedGATS(GlobalAutomotive TelematicsStandard).GATSprovidesthemodularframeworkforimplementingsuchtraffictelematics servicesonanopentechnologyplatformandisnetworkindependent.Inmanydetailsdefinitionsare necessarytoensureinteroperability.There
24、fore,thosedetaileddefinitionsaregiveninanetworkspecificpart (CEN/TS148218).WiththedevelopmentoffuturemobilecommunicationsystemstowardsUMTS/IMT2000 thebottleneckofnarrowbanddatacommunicationmightfade.Duetoitsmodularstructure,theGATS frameworkandapplicationsarepreparedforthatduetoitsnetworkindependenc
25、e.Thesameholdsfor emergingtechnologiesforpositioningwhichtodayisalmostexclusivelybasedonGPS. Otherrelevantstandarddevelopmentsare,independentfromtelematics,theapplicationindependent WirelessApplicationProtocol(WAP),enablingmobileaccesstotheInternet.Itisunderstoodthatthese emergingtechnologiesmightfi
26、tintotheframeworkoftelematicsapplicationsinfutureWAPversions.Forthe timebeing,GATSalreadytodayindependentlyfromWAPenablesaccesstotelematicsservices.Utilisation ofGATSonaWAPprotocolstackandidentifyingnecessaryadaptationofWAPspecifications(ifany)is currentlyunderinvestigationoftheappropriategroupswith
27、inWAPForumandGATSForum.CEN/TS148217:2003 5 1.Scope ThisCEN/TSdefinesthespecificinterfacesandfunctionalityoftraffictelematics(TT)servicesbasedonthe useofcellularnetworks.Devicemanufacturersareenabledtodevelopterminalequipmentcompatibleto servicesbasedonthisCEN/TS.Thiswillallowforinteroperabilityofdif
28、ferentterminalequipmentandservice providerswhichallowscompetitionbetweenserviceprovidersandterminalmanufacturers.Furthermoreit setsthesceneforinternationalavailabilityoftheseservices. ThisCEN/TSspecifies TTspecificinterfacesbetweenterminalandservicecentre.Thisespeciallyincorporatesthemessage setsoft
29、heapplicationdataprotocolsandtheserviceindependentcommunicationhandling(including conditionalaccessandtransportprotocols). Functionality,proceduresandrequirementsofbasicterminalcomponentsaswellastheirinteractionwith theservicecentre.Thisespeciallycomprisesconditionalaccessandsecuritymechanisms. Serv
30、iceSpecifications,whichareessentialtoensureconsistentbehaviourofterminalandservicecentre. Theservicesincorporatedwithinthisissuecomprise: breakdownandemergencyservices interactivetrafficinformationservices broadcasttrafficinformationservices navigationservices(routeassistance,routeadvice,homing) ope
31、ratorservices generalinformationservices floatingcardatacollection Itisenvisagedthatfutureresearchanddevelopmentwillleadtoimprovementsontheserviceslistedabove aswellastothecreationofnewservices.NeverthelessthisCEN/TSprovidestheframeworkforseamless integrationofnewfeaturesandservicesintotheexistingar
32、chitecture.CEN/TS148217:2003 6 2.Normativereferences Notapplicable 3.Definitionsandabbreviations 3.1Definitions ForthepurposeofthisCEN/TS,thefollowingdefinitionsapply: 3.1.1Accuracy Theabilityofthepositioningmoduletomaintainthevalueofaspecifiedparameterwithinanerrorlimitwitha specifiedprobability. 3
33、.1.2Attribute(ofaTrafficInformationMessage) ATrafficInformationMessageismadeupofseparatepartsthatcanbecalledattributes.Thisincludes,for example,anitemofinformationandalengthofvalidity. 3.1.3Authorisation Reciprocalproofthattheidentityprovidedbythecommunicationspartnerisvalid 3.1.4Availability Theabi
34、lityofthetotalsystemtoprovidetherequiredguidanceattheinitiationoftheintendedoperation.Itis evaluatedbydeterminingtheprobabilitythatthe systemstartsupprovidingtherequiredpositioning informationattheinitiationofeachtestride. 3.1.5BroadcastService Dataservicewithinacellularwirelessnetworkthatallowsform
35、onodirectionaldisseminationofdatafroma servicecentretomultipleusersintheareaofsignalreception 3.1.6BypassDescription RepresentationofaBypass,consistingofaBypassHintand/oraBypassRoute. 3.1.7BypassHint RepresentationofahintforaBypass 3.1.8BypassLink ProminentwaypointsonaBypassRoute 3.1.9BypassRoute Re
36、presentationoftherouteforaBypass 3.1.10CellBroadcast BroadcastserviceoftheGSMnetworkCEN/TS148217:2003 7 3.1.11Continuity Theabilityofthetotalsystemtoperformitsfunctionwiththerequiredperformancewithoutinterruptionduring theintendedoperation.Itisevaluatedbydeterminingtheprobabilitythatthesystemprovide
37、stherequired positioninginformationwithoutinterruptionduringthedurationofeachtestride. 3.1.12Coverage Relatestothephysicalboundarieswithinwhichthepositioningmodulemustbeabletoprovideitsinformation withtherequiredperformance. 3.1.13Datatelegram Digitalmessageexchangedbetweentwosystems 3.1.14DeliveryN
38、otification Networkacknowledgementforsuccessful/unsuccessfuldeliveryofamessagetothemobiledevice 3.1.15FunctionalRoadClass Aclassificationbasedontheimportanceoftheroadelementintheconnectivityofthetotalroadnetwork 3.1.16FunctionalRoadClass0 Motorways 3.1.17FunctionalRoadClass1 AllnonMotorwaysthatarepa
39、rtofaconnectionusedfornationwidetrafficandtransport 3.1.18Geocode Geocodesareuniqueidentifiersunmistakablydefiningimportantpointsonroadnetworks.Geocodescanbe derivedfrom/convertedintoWGS84coordinatesbythealgorithmdescribedinCEN/TS148213. 3.1.19Hardwareserviceagents Partnercompaniesofthetraffictelema
40、ticsserviceproviderswhoareauthorisedtoinstallonboardequipment intovehiclesandtomaintainit 3.1.20Homing Simpleformofguidancetodestination,inwhichthedirectionand straightlinedistanceofthedestinationareindicated 3.1.21InformationElement Informationunitofamessage 3.1.22Integrity Thequalitywhichrelatesto
41、thetrustwhichcanbeplacedinthecorrectnessoftheinformationsuppliedby thepositioningmodule.Itisspecifiedintermsoftheprobabilitythattherequiredperformanceparametersare notdegradedbyanundetectedfailure.Therefore,integrityincludestheprovisionofanerrorestimationfor specificparameters.Theestimatederrorsmust
42、bemaintainedwithincertainlimitswithspecifiedprobabilities (ProbabilityofMissedDetection,PMD;ProbabilityofFalseAlarm,PFA).Integrityalsoincludestheprovision ofawarningthatthesystemshouldnotbeusedfortheintendedoperationincasespecifiederrorlimitsare exceeded. 3.1.23Intersection JunctionoftwoormoreroadsC
43、EN/TS148217:2003 8 3.1.24Latency Theperiodoftimesinceapplicationofpoweruntilpositioninformationwithaspecifiedaccuracycanbemade availableintheterminaldevicefortraffictelematicsserviceinitialisationand/oruse. 3.1.25LengthofaSpeechReport LengthofaSpeechReport,includingpauses,intenthsofasecond 3.1.26Mob
44、ileOriginated DatatelegramsentfromtheonboardequipmenttotheServiceCentre. 3.1.27MobileTerminated DatatelegramsentbytheServiceCentretotheonboardequipment. 3.1.28Onboardequipment Asystem,generallymobile,interactingwiththeservicecentretohandletraffictelematicsservices 3.1.29RoadJunction Intersectionoftwoormoreroads 3.1.30Routedescription Descriptionofarouteshowingthegeometryofstreetintersections,manoeuvreinstructions,streetand
