transas ais network - maritech-adriatic.commaritech-adriatic.com/documents/ais_network.pdf ·...
TRANSCRIPT
TRANSAS AIS NeTwoRk
Functions• TransparentconnectionofAISNetworkclientsto
MultiAISBaseStationenvironment
• AISdatamanagementandrouting
• Centralized control and diagnostics of AIS BaseStations
• Services to AIS Network clients like on-line datareception for surveillance purposes, binary andsafety relateddataexchangebetweenshipsandclients,etc.
• AIS data exchange with other National orInternationalAISNetworksystems
AIS (Automatic Identification System) is an electronic tracking systemused by VTS operators to identify and locate vessels. VHF-based, thesystem transmits important information such as a vessel’s MMSI, itscourse,speed,positionandcargo.
AIS technologies have become crucial for ensuring safety at sea andmonitoringcoastalareas.
AnAISNetworkenablescoastal services toestablishdigital linkswithships allowing them to forward important messages such as weatherupdatesorchangesofnavigation.
TheAISNetworkguaranteescoordinatedoperationofalltheAISbasestations, absence of collisions and effective use of VHF data link anddatacommunicationschannelsinagivenarea.AISNetworksystemscansolveinacentralizedmanner,problemscommonforthegivenarea,e.g.,transmissionofDGNSScorrectionsviaVHFdatalink,orworkwithAtoN.
“TheTransasAISNetworkSystemcomplieswiththelatestinternationalrequirements:IMO,ITU,IECandIALAstandardsandrecommendations(IEC62320-1,ITU-RM.1371-1,IEC61993-2,IALAA-124).
TheuseofstandardprotocolsenablesTrANtoexchangedatawithanyexternal AIS networks. Flexibility and modular principle underlyingTransasAISNetworksolutionsallowcreatinganysystemsonthelocaland international scale, and their future upgrades at no considerablecost.
• AISdatalogginginSQL-baseddatabaseforfurtherretrievalanddataprocessing
• Centralized system configuration, control anddiagnostics
• Presentation of AIS information on the ClientWorkstationswiththeuseofTransasAIS-Monitorsoftware or any other IEC 61993-2 compliessoftwareadoptedtoTCP\IPconnection
• Presentation of AIS information over electronicchartsusingstandardInternetWEBbrowser
trAn system componentsMainsystemcomponents:
• AISBaseStationNetwork
• AISNetworkInformationHandlingSystem(IHS)
• AISNetworkManagementSystem(NMS)
• All the equipment is connected to theTrAN System Core networkhighlyprotectedfromallexternalsubsystemsthroughFirewall
• TrANIntranetandInternetClients
• InterfacetotheexternalNationalandInternationalAISNetwork
• DataCommunicationNetwork(switches,routers,firewallsetc.)
trAnsAs Ais network
Ais Base station networkTheAISBaseStationNetworkprovidesaninterfacebetweenAISNetworkcomponentsandAISVHFDataLinkradionetwork.
AISBaseStationsNetworkincludes:
• SingleorredundantTransasT214AISBaseStationsoranyotherBaseStationcomplyingwithIEC62320-1standard
• SingleorredundantBaseStationControllerwhichisastandardCOTSrack-mountcomputerwithBSCsoftwareinstalledinit
transas Ais Base station Functions• VDLslotsreservationforowntransmissionsandremoteAISdevices
(likeAtoNs)usingFATDMAVDLaccessscheme
• Configurabletransmissionofdifferentialcorrectionmessages(RTCMmessages)onAISchannels
• LocalorremoteBaseStationconfiguration,management,extendeddiagnosticandpowercontrol
• CapabilitytomanagethereportingrateofmobileAISunits
• CapabilitytochangefrequenciesofmobileAISunits
• Capability to send/receive addressed or broadcast text messages(SMS)
• Capabilitytooperatewithbinarymessages
• BroadcastdedicatedBaseStationreportmessages
• Capability to broadcast differential GPS correction (RTCM data) viaVHFdatalinktomobileunits
• Transmissionofshiptrackingdatafromradartrackingsystem(VTS)tomobileAISunitsviaAISVHFdatalinks
• Data exchange with operator station to send AIS data for furtherprocessingandpresentation,receptionofoperatorcommandsandmessagestobesentviaAISVHFdatalinks
• Remote controlled digital Input/Outputs for management andmonitoringofexternalequipment(forexampleVHFantennaswitch)
• RemoteAISBaseStationfirmwareupgrade
transas Ais Base station controller Functions• Reception/transmissionofdatafrom/toAISBaseStations
• Conversion of serial data to Ethernet TCP/IP protocol and viceversa,andadjustabledatafilteringtoworkoverbandwidthlimitedcommunicationlines
• AISBaseStationcontrolandmonitoring
• AISBaseStationredundancycontrolindualredundantconfiguration.Provides automatic and manual fail-over functionality in case ofhardwarefailure
• VHFantennacoaxialswitchcontrolinredundantconfiguration
• Local storage of AIS messages for further retrieval in case ofcommunicationfailuresbetweenBSCandAISNetwork
• VDLAnalyzingtooltoinvestigateslotsconflictproblem
Ais network information Handling systemThe Information Handling System (IHS) ensures transparent datahandlingbetweentheAISBaseStationnetwork,remoteusersandothernationalandinternationalAISNetworkSystems.
TheInformationHandlingSystemincludes:
• TrANSystemController
• TrANDatabaseServer
• TrANClientServer
• TrANWebAccessServer
• TrANBroadcastServer
• TrANTelegramGate
The IHS has an open system architecture providing easy systemexpandabilityandintegrationpossibilities.Alltheserverscanbeinstalledinsingleorredundantconfiguration.ThecoreofthesystemisseparatedfromtheclientsystemandallowsmultipleclientstocommunicatewithmultipleshipborneAISsystemsviamultipleBaseStations.
Ais network information Handling system securityWith regard to the network security level, AIS Information HandlingSystem can be divided into two parts. The first includes the SystemControllerandDatabaseServerwhichformtheIHSkernelandrequirehighsecurity level for thereliableoperation.ThesecondpartconsistsoftheClientServerandWebAccessServerwhichprovideclientaccessto the network.TrAN Broadcast Server andTrANTelegram Gate fulfillservicefunctions.
TrANusestwo-levelsystemsecurity.Installedonthefirstlevel,Firewall/VPNensuressecureexchangeofdatavia the Internet.Onthesecondlevel,theFirewallisinstalledbetweentheClientServersandIHSkernel.TheFirewallcompletelyisolatesthemainsub-networkfromtheoutsideworldwarrantingthenecessaryTrANcomponentinteraction.
trAnsAs Ais network
trAn system controllerthe trAn system controller functions• CommunicationanddataexchangewithallPhysicalShoreStations
intheNetwork
• Communication and data exchange with other national orinternationalAISNetworkSystems
• Storage of Physical Shore Station configuration (AIS Base Stationsand Base Station Controllers) and external AIS Network Systemsconfiguration
• Definingofspecial“broadcastareas”withvirtualMMSItobeusedforsendingsafetyrelatedorbinarymessages
• Common AIS data processing including routing, filtering andduplicatemessagesremoval
trAn Database serverTrAN Database Server is intended for storage and further analysis ofinformationcirculatingintheAISNetworksystem.ThedatabaseitselfisconstructedusingSQL.
the trAn Database server functions• StorageofAISinformationintwoindependentconfigurabledatabase
parts(forexample,asshort(“live”data)andlongtime(historicaldata)storages)
• AdjustablefilteringanddecimationofAISdatabeforewritingtothedatabase
• EffectivedatasearchbythesetcriterionanddataexporttoatextfileinrawAISIECformat,withaselectableoptiontoincludeUTCdateandtimebeforetheAISmessage.Thefollowingsearchcriteriacanbeusedforexportingdatafromthedatabase:
– Geographicalarea
– SourceandDestinationMMSInumber
– DateandTime
– TypeofShip
– AISMessagetype
– ShipName
– CallSign
• RecoveringofAISdatastoredonBaseStationControllersatthetimewhenalinkislostbetweentheAISNetworkCentreandBaseStationsite
• InlandAISdatasupport
the trAn Database Access server functions• Providingmachine-machineinterfaceforexternalclientstorequest
andreceivethedatastoredinTrANDatabase
• Calculation and output of statistical data requested by externalclients
trAn client serverTrANClientServerprovidesAISclientswithavarietyofservicesrelatedtodataprocessing.
the trAn client server functions• Client interfacewithAISNetworkSystembasedon IEC61993-2Annex
B packed into aTCP/IP frame.The interface is adapted to comply withrelevantIALArecommendationsforashorebasedAISstation.Aship-borneAISElectronicChartSystemcanbeconnectedtoAISClientLANServerbyusingIEC61993-2AnnexBprotocol,adaptedtosocketconnectionandloginprocedure,tosendandreceiveAISinformationfromthesystem
• Networksecurity:clientauthorization,messageverification,blacklistsandwhitelistsbasedontheirIPaddresses.
• Assigning of virtual MMSI number for each client to be used as asourceMMSInumberwhenthemessagefromtheclientwillbesentviatheAISVHFdatalink
• Enabling a client connected to the network to send/receive AISmessages
• Client associated filtering. Filtering rules can be defined for eachclientindependentlyorforpredefinedclientgroups(userprofiles)
• RoutingofthemessagesfromtheshipsaddressedtoashoreclientwithavirtualMMSI
• Client capability to send safety related and binary messages usingdefinedgroupsofBaseStations(LogicalShoreStations)
• Sendingatransmissionacknowledgementtotheaddressedmessagefromtheshipifthedestinationclientiscurrentlyconnectedtothesystem
• InlandAISdatasupport
trAnsAs Ais network
trAn web Access serverTrANWebAccessServercanbeusedtoprovideuserWebaccesstotheAIStargetdatathroughtheInternetusingastandardWebbrowser.ThiskindofaccessprovidesdataonallkindsofAIStargets(vessels,AtoNs,BaseStations,SARaircrafts).Targetsaredisplayedonthechartandonthetargetspanel.
Web access to the Transas AIS Network is provided to the customerregisteredintheTrANWebAccessServer,fromanycomputerwhichhas:
• JavaRuntimeEnvironment
• MicrosoftInternetExplorer
• AccesstotheInternet
Features• DisplayoffullsetofdynamicandstaticAISdataonelectronicchart
andintabularform
• All types of AIS objects are supported: class A and class B vessels,AtoNs,AISBaseStationsandSARaircrafts
• Displayoftargetmovementhistory(tracks)
• Dataupdatedautomaticallyorattheuser’scommand
• ControlofthedisplayareaintheChartWindow
• Target search,user defined filters andareas as wellas other usefultools
• Nodedicatedsoftwarerequired
• Password-protectedaccess
• Multi-languagesupport
the user can:• ViewalistofAIStargets,AISBasestations,AtoNsandSARaircrafts
overvectorElectronicCharts
• Viewparametersofthetargetselectedwiththecursor
• Sorttargetsbyanyofthecolumns
• Find a target in the table by using the following criteria: Name,CallSign,MMSI,IMOnumber,destination,typeofship
• Focusonatargetonthechartbyusingthecontextmenu
• Viewtargettracks(upto60minuteswithoutaccesstodatabaseandupto1monthwithdatabaseaccess)
• UseERBLtoolfordistancemeasurements
• Exporttargettable
• Defineareas,filtersandtargetcolours
• Customizedatapanelandtooltip
• Turnonautomaticupdatingoftargetdataatacertaintimeinterval.Theupdatingperiodisfrom30secondsto10minutes
• Updatetargetdatamanually
• Adjustthesetofdisplayedchartlayers
• Alterthechartdisplayarea
• Returntothepreviouschartwindowdisplayarea
• Changethechartdisplayscale
• Increaseorreducethechartdisplayscalebyonestep
trAn Broadcast serverTrAN Broadcast Server provides the functionality for broadcastingvarioustypesofdataoveranAISNetwork.
TrANBroadcastServercanbeconnectedtotheTrANSystemControllerPC or Base Station Controllers via LAN (TCP/IP) or direct to AIS BaseStations via Serial interface. These connections are used to send AISmessagestoanAISVHFDataLink.
the trAn Broadcast server provides:• BroadcastingofVTS(pseudo-AIS)targetsreceivedfromTransasVTS/
CSSsoftware
• Broadcastingofweatherdatareceivedfromweatherstations
• BroadcastingofDGNSScorrectionsreceivedfromDGNSSReferenceStations
• BroadcastingofMOBDFdatareceivedfromMOBDFRhotheta202
• Broadcastingonpre-definedscheduleofSafetyRelatedandBinaryAISTextTelegrams
• BroadcastingofVirtualandSyntheticAtoNs
trAn telegram GateTrANTelegramGateprovidesatwo-wayserviceforexchangeofshorttextmessagesbetweenaship’sAIStransponderandcoastalSMS/E-Mailservices.Notethatthe,forthistowork.,TrANTelegramGateshouldbeconnected to a GSM modem Siemens TC65 or compatible to E-Mailservice.
trAnsAs Ais network
Ais network mAnAGement systemThe Network Management System (NMS) is intended for centralizedmonitoring and configuring of TrAN components. NMS include TrANManagement Server and Network Management Consoles. NMSmonitors and controls AIS Network System components, shows thesystem,alarmsandeventsstatusandconfiguration,handlesclientsandsoftwaredownloadtoServersandPhysicalShoreStations.
Alltheconnectedequipmentandtheiroperationerrorsareshowninanintuitivelyclearform.
the network management system functions• ControlandmonitoringofthefollowingTrANequipment:
– Base Stations including connections, antenna units, FrameSynchronizationerrorandetc.
– BaseStationControllers
– TrANSystemController
– TrANClientServer
– TrANDatabaseServer
– TrANBroadcastServer
• Graphicdisplayofalltheconnectedequipmentstatus,graphicandtextpresentationoferrorsintheequipment
• PasswordprotectedadvancedconfigurationofAISNetwork:
– Addition of new Base Stations without interrupting the systemoperation
– Configuringof theClientServer inorder toadd/remove/changeclient’s filtering rules. Addition of new clients will not affect theclientsalreadyconnectedtothesystem.
– Configuring of System Controller in order to connect to othernational/internationalAISNetworks
– ConfiguringofSystemControllerinordertoaddnew“broadcastareas”or“broadcastBaseStationgroups”
– ConfiguringofDatabaseServerinordertoadjustfilteringrulesforthemessagesstoredintheAISdatabase
• Passwordprotectedsoftwareupgrade
• Differentaccesslevelstoprotectcriticalsystemoperations
• Displayofsystemdiagnosticandoperationalstatusattheoperator’srequest
• Displayofequipmentfailure/overloadalerts
• Event log functions on AIS Network Manager Server. The eventsincluding system alarms/warnings and clients login/logoff will bestoredinadatabase
• Capabilitytosearchfor,viewandprintalarmsstoredinthedatabase
• Operationalstatusdisplayandprintout
• Displayofperformanceandutilizationdata
• Viewing,searchingforandprintingouttheeventlog
Ais stAtistics toolAIS Statistics is an easy and convenient tool to analyze data obtainedfromtheAISNetworkDatabase.
DevelopedasaMicrosoftExcelmacro,itallowstheusertobuildvarioushistograms of arbitrary passage line crossing. Histograms can bepresentedasExceldocumentsorexportedforusebyotherapplicationsusingstandardOfficeformats.
trAnsAs Ais network
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