workshop best practices in monitoring deployment thursday, 15th and friday, 16th of march 2007,...
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workshop
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y Future Communication between Outstations and Centres –
A Concept for the German Motorways
Eike PögelHeusch/Boesefeldt GmbH
Dr. Lutz RittershausFederal Highway Research Institute - BASt
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
- 2 -
Average daily traffic (ADT) on German highways.
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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Implementation of an ITS-system in Germanysince about 30 years.
1975: VRZ Aichelberg
2005: VZ Hessen
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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Systems in operation (2002):
850 km Section Management
1.700 km Network Management
Programme on traffic management for the federal motorways in Germany.
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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ForeignTraffic Centre
Traffic Control Centre
Traffic Control Centre
Sub-CentreSub-Centre
OutstationOutstation
Detectors, Variable Message Signs, ...
Detectors, Variable Message Signs, ...
Directives
TCC
SC
OS
SC SC
OS OS
Regional Traffic Information
Centre Communication interface to external Systems (e.g. Datex)
Communication interface to external Systems (e.g. Datex)
Instructions for the Equipment of Traffic
Control and Sub Centres (MARZ),
"AK VRZ"
Instructions for the Equipment of Traffic
Control and Sub Centres (MARZ),
"AK VRZ"
Technical Specifications for Outstations (TLS)
Technical Specifications for Outstations (TLS)
Traffic Control System Germany.
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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Roadside Outstation
Roadside Outstation
Traffic Control Centre /
Sub-Centre
Traffic Control Centre /
Sub-Centre
TLS: Technische Lieferbedingungen für Streckenstationen / Technical Specifications for Outstations
Basic idea of the TLS: to define functional groups for roadside equipment, to standardise the interfaces and communication protocols, to create a common data modelling, to make the equipment of different suppliers compatible, to define, test and make performances comparable and to allow open and clear tendering and system operation.
Interface between Outstations and TCCs.
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
- 7 -
Structure of TLS.
FG 0: Reserved for testing purposes FG 1: Traffic data acquisition FG 2: Weight in motion FG 3: Environmental data acquisition FG 4: Variable message sign and variable direction sign control FG 6: Operational messages and control FG 7: Control of external systems FG 8: Enforcement systems FG 9: Ramp metering FG 10 to 127: Reserved for subsequent universal definitions FG 128 to 253: Res. for manufacturer defined function groups FG 254: System control (internal) FG 255: Reserved for special applications
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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Example of an Outstation.
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
- 9 -
Preliminary Issue in 1988, content: Traffic data acquisition
Issue in 1990 with additional features on communication
Issue 1993: first complete edition, obligatory for roadside traffic control equipment
Main Draft in 1997 Issue 2002: optimised, revised edition Issue 2007 in preparation: new communication
technique and additional features
History of TLS.
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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Communication restricted by infrastructure of the 80´s Partyline 1200 Baud datagram size <256 bytes Research projects: Recommendations for a new TLS
Technical Organizational
Constraints of todays TLS
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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Recommendation: „TLS goes TCP/IP“ Todays standard communication protocol Austrian ASFiNAG: Adoption of TLS, but with TCP/IP
extensions NTCIP (USA) based on TCP/IP (UDP) In-field communication: PROFIBUS -> PROFINET TT: DATEX(2)
TCP/IP (ISO/OSI 3-4)
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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With introduction of TCP/IP broad range of technologies available Fiber optics Twisted pair WLAN GSM/GPRS
Hard- and software vendors Conclusion: Motorway communication infrastructure as
network Recommendation: Future TLS open for (new)
technologies
Hardware Infrastructure (ISO/OSI 1-2)
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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TLS-ISO/OSI Layer 7 Actual TLS-datagramm description
Bits&bytes Paperwork, not toolbased Potentially ambigous, error-prone, can be interpretated Weak modelling
Data Modelling (ISO/OSI 7)
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
- 14 -
Data Modelling (cont‘d)
Methodology: UML as platform independent modelling language
TLS-datagrams as UML packages and class diagrams
TLS procedures as UML sequence diagrams UML profiling for various aspects possible
XML profiles SOA profiles (e.g CORBA, SOAP) „old TLS“ profile (->backward compatibility)
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
- 15 -
TCC/SC networks firewalled IP communication between outstation and TCC/SC Outstations become part of TCC/SC network Potential breach of security Recommendation: Tunneling (ssh/ssl) Point-to-point communication: Portforwarding Strong encryption: Verifies data integrity Public-private-key authentication
Security aspects
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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TCC/SC Applications
SOAP/TCP/IP
application levelgateway
TLS-OSI1-7
Migration Strategy
TLS-OSI1-7
outstationfunctional
groups
SOAP/TCP/IP
outstationapplications
field
bus
/pa
rty
line
netw
ork
infa
stru
ctur
e
TCC/SC Applications
TLS-OSI1-7
TLS-OSI1-7
outstationfunctional
groups
field
bus
/pa
rty
line
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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Concept based on TCP/IP OTS communication hard- and software Exact data modelling
-> Keeping best experiences of traffic monitoring and control
-> Backward compatibility: Migration concept allowing for integration of old and new TLS infrastructure
Recommendation: Concept study of a TCP/IP/SOA(P)-based TLS system
Consistent TLS-communication concept
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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This working group consists of representatives from: Road operators (German road administrations, ASFiNAG) Sensor and VMS manufacturer Traffic control centre manufacturer Engineering and consulting companies
Creation of TLS.
The further development of the TLS is be done by the AK TLS (Working Group TLS).
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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A modular loose-leaf document system allow the update and release of single chapters without releasing a complete new edition.
Updates and corrections should in the future be initiated by any member of the TLS community using a RFP/RFC procedure, moderated by BASt.
Updating of TLS.
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Future Communication between Outstations and Centres – A Concept for the German Motorways
Eike Pögel, Heusch/Boesefeldt GmbHDr. Lutz Rittershaus, BASt
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Thank you for your attention
Dr.-Ing. Lutz Rittershaus
Federal Highway Research InstituteTelematics, Traffic ManagementBrüderstraße 5351427 Bergisch GladbachGermany
Eike Pögel
Heusch/Boesefeldt GmbHTransport TelematicsTempelhofer Straße 4-652068 AachenGermany