Group: AUTOSAR

I we see the Autosar Metamodel the System class has a multiplicity of 0 to *, which means we can have more than one System. This is bit confusing for me . Does this mean that each Ecu we can have a System or a group of Ecu in a Vehicle will have a System or all the Ecu in the Vehicle will have a single System?

Well, as in the glossary (3.189):
"An integrated composite that consists of one or more of the processes, hardware, software, facilities and people, that provides a capability to satisfy a stated need or objective."

And in the comment:
"One correct interpretation is: - it might be a composition of one or more ECUs"

This comment is probably the best description for it, E.g. consider a "system" from more than one sensor of the same or a different kind. E.g. a video processing unit and a camera unit, both together are a system. Or several sensors of the same kind on every corner of the car. But only one sensor of them is supposed to communicate with the rest of the car. The other ones communicate over a private CAN with the master sensor.
Now we have already two separate systems, maybe call them subsystems, which are part of the one 'overall' system of the car itself.

H. Riedel

Hello Mr. Henning

Thanks for the reply,
The explaination put forward by you justifies the existance of multiple system in a vehicle.
In that case we need to identify the master System out of multiple System, For this the Autosar metamodel doesn't have a metamodel class. Which makes the situation bit complicated as all the system will exist independently in a vechile. But logically we should have a Master System in a multiple System scenario.

Vishal Gupta schrieb:
Hello Mr. Henning
 
Thanks for the reply, The explaination put forward by you justifies the existance of multiple system in a vehicle.
In that case we need to identify the master System out of multiple System, For this the Autosar metamodel doesn't have a metamodel class.
Why would you need an extra meta-model class? If there are subsystems, they are linked to one parent subsystem (hopefully). Otherwise, you are right that there are different systems if they are separate.

Which makes the situation bit complicated as all the system will exist independently in a vechile. But logically we should have a Master System in a multiple System scenario.
I don't even see a problem in having more than one separate systems within the car.
In my point of view, a system is a logical view.

And finally, the whole car itself can be a (master-)system, e.g. in the end, something in the car must also provide all the power needed to drive all the (sub-)systems.