1. A SOA for the car
Roland Tritsch, Solutions Architect, IONA Technologies

2. 2
Agenda
• Introduction
– Sharing observations
– Motivate the problem
• Discuss a possible solution
– Service Oriented Architectures
– WebServices Definition Language
– Shortcomings
• Summary
– Q&A

3. 3
Embedded SWE: Quo vadis?
• The conventional way of
embedded SWE has
reached its limits
– Informatik-Spectrum, Broy Mechatronic
• Mechatronic alone is
probably not able to fix it
• But combining it with
already proven concepts, Embedded Application
standards and tools from SWE SWE
the application SWE
domain might lead to the
required quantum leap in
productivity

4. 4

5. 5
Current situation

6. 6
Current situation
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Effort

7. 7
Resulting challenges
• Development
– Software Quality
• Testing
– Reuse
• Production
– Update/Upgrade
• Versioning
– Configuration
• UPNP
– Diagnoses

8. 8
The solution
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9. 9
What’s missing?
• Abstraction ! !
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– A way to define abstract
interfaces between the
services
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• Standards %& " !
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– Standards to describe
these interfaces
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10. Objects, components and services
Scope
Services
Components
Objects
Granularity

11. 11
SOA Primer
Registry
2. Lookup Repository 1. Register
C C
o o
n (Virtual) Bus n
Requester t t Provider
r r
a 3. Interact a
c c
t t

12. 12
A SOA for the car
ECU
S S
ECU ECU
S
Contract Contract Contract
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Contract Contract Contract
ECU
S ECU
S ECU
S

13. 13
What do you need?
• A way to access T&P independent
the services
• A way to define Service Access
the services
• A virtual bus
– ESB, EMI, … Service Definition
• Transport and protocol
independence
• Based on Service Bus
(open) standards

14. 14
What do you need?
• A way to access T&P independent
the services
• A way to define
the services
(W)SIF
Service Access
• A virtual bus
– ESB, EMI, …
(W)SDL
Service Definition
• Transport and protocol
independence
• Based on CAN, MOST,Bus
Service FLEX, …
(open) standards

15. 15
(W)SDL might be a good canditate
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16. 16
The Service Definition Language
• WSDL is/got famous for its SOAP over HTTP binding
• But WSDL is Open and Extensible
– Extensibility allows non-SOAP bindings (see below)
– Extensibility allows service policies to be defined in contracts too
• Already existing non-SOAP/HTTP bindings
– Transports
• MQ, Tuxedo, Tibco, CORBA, IIOP, HTTP/S
– Protocols
• XML, Fixed Format, FML (Tuxedo), TibRvMsg, G2++
• Service Policies
– Routing, Failover, Security, Transactions, etc.

17. 17
WSDL Extensors
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18. 18
“Und was ist mit ECUs?”
• ECUs send and
receive messages as % # $
telegrams "
• Every telegram is fixed !
in size and format
• Means we need
something like a fixed
binding
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• We also need a
transport (e.g. CAN
bus)

19. 19
WSDL Extensors
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20. 20
Fixed Format Binding
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21. 21
CAN Port Extensor
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22. 22
Summary
• Integrating an increasing number
of ECUs will become one of the
major challenges for the automotive
industry
• Applying concepts, standards and tools
from the application SWE domain might help
– E.g. Middleware, CORBA, WebServices
• WSDL might be a good candiate as a universal service
description language to describe the services in a car
– But there are also (still) a lot of shortcomings
• WSIF is complementary to WSDL and provides a means to
access the services in a uniform way

23. 23
Thank You
&
Questions