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Technical Paper

Higher Level Drivers for Networked Systems in Cars

1991-02-01
910467
The overall complexity of future cars requires new design methods for effective and high quality results. A new VLSA-approach (VLSA = Virtual Leveled Systems Architecture) for modelling networked systems is proposed. As a support for the application design engineers a set of so-called Virtual Memory network drivers is described encapsulating the implementation details of the actual network protocol resulting in more economic and higher quality solutions. In the first step a software network driver set for VMO-level (VMO = Virtual Memory driver level O) is proposed for CAN networks based on 96- and 51-family controllers. As a complement to the design phase support a set of network development tools is mentioned helping the engineers in the test phases of networked systems.
Technical Paper

System Design Tools for Networked Systems in Cars

1990-02-01
900698
Cars networked electronics represent very complex systems. Ruling this complexity is a great challenge to future cars system designers. As there are no analytic solutions to the problem only good modelling in conjunction with trial and error methods will be apropriate to attack the problem. In order to produce results in a timely and cost effective manner a new generation of System Design Tools is needed to support the system design process. In the following paper a new method for assessing the system design problems is proposed: VLSA - Virtual Leveled System Architecture. A set of Network Development Tools - Simulator, Emulator, Analyzer, etc. - is discussed as the basis for efficient system design support.
Technical Paper

Simulator for Planning Structured Networks in Cars

1990-02-01
900697
Multiplexing within motorcars, that means using invehicle- controller-networks, is a new trend to push car developement to more economics, to less pollution, to more security and to more convenience. More and more functions will be integrated into the networks which will grow larger and larger. That leads to so called structured or hierarchical networks. One main difference of controller-nets in comparison with other local area networks is, that they have to meet realtime requirements. Messages, crossing the communication lines, have to do that within a certain time to fullfill certain control functions. To support all phases of network developement, beginning with planning and ending with test and maintenance, an according toolset family - comprising Simulator, Emulator and Analyzer - has been introduced by I + ME-Company [0], [1], [14], 19]. This paper results from a joint venture between Fachhochschule and I + ME-Company in Wolfenbüttel, Germany (FRG).
Technical Paper

In-Vehicle Networking Requires New Development Tools

1989-02-01
890533
Future cars' architecture will be based on networked electronics. Designer of such networked systems envisage a new class of highly sophisticated complexity. Therefore a new class of appropriate system design support tools is required. This paper describes a full set of such tools, consisting of a Network Simulator, a Network Emulator and a Network Analyzer. The Simulator is used for system layout purposes without the need for actual system's hardware. The Emulator replaces in real time real system's component. The Analyzer is used for verification of the system's layout in the actual real system. As network is the backbone of future cars' systems network development tools are fundamental for efficient cars' system design.
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