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Development of the Physical Layer and Signal Integrity Analysis of FlexRay™ Design Systems
Technical Paper
2007-01-1636
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Future automotive applications, like high-speed control in power train or drive-by-wire systems, demand large bandwidth, deterministic communication behavior, and fault tolerance. FlexRay, a new standard communication system, is ideally suited to safety applications as well as applicable to the role of a central backbone in future ECU network architectures. The FlexRay physical layer specification is kept very generic to provide the network designer with a wide range of possibilities for optimization of the network implementation. Due to the highly transient behavior of the system, the developer of the network physical layer cannot manually predict the behavior of an entire FlexRay topology. To analyze design concepts like topologies, terminations, and ECU architectures much earlier in development phase, simulation is the only choice. Simulation can be used to predict physical behavior and to verify the physical layer implementation of a FlexRay network while accounting for component and environmental variations. Accordingly, the developer can use simulation in the design of a robust network to investigate the influence and interoperability of new components and ECU interfaces with the goal of improving quality in automotive networks. Using virtual prototypes or production networks in conjunction with Robust Design methods, the developer can analyze network extensions (e.g. through automated wire length variations) and verify the impact of device tolerances. This paper describes the required elements for simulating the FlexRay physical layer, including simulation models, simulation scenarios, and post-processing mechanisms needed to sufficiently evaluate system behavior.
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Gerke, T. and Bollati, D., "Development of the Physical Layer and Signal Integrity Analysis of FlexRay™ Design Systems," SAE Technical Paper 2007-01-1636, 2007, https://doi.org/10.4271/2007-01-1636.Also In
SAE 2007 Transactions Journal of Passenger Cars: Electronic and Electrical Systems
Number: V116-7; Published: 2008-08-15
Number: V116-7; Published: 2008-08-15
References
- FlexRay Protocol Specification V2.1 Revision A FlexRay Consortium 12 2005
- FlexRay Electrical Physical Layer Specification V2.1 Revision B FlexRay Consortium 11 2006
- FlexRay Electrical Physical Layer Specification V2.1 Revision B, Application Notes FlexRay Consortium 11 2006
- Development and Verification of In-Vehicle Networks in a Virtual Environment Gerke Thorsten Synopsys GmbH Schanze Carsten Volkswagen AG SAE World Congress Detroit 2005
- Physical Layer - Basis of an Automotive Bus using the Example of FlexRay Minuth Jürgen Prof. University of Applied Science Esslingen EESystems Conference Unterhaching/Munich 2006
- Requirements Specification for Transceiver Simulation Models Schanze Carsten Volkswagen AG Bayer Harald Ostowski Dietmar DaimlerChrysler AG 2006
- Monte Carlo Simulation for Validation of first FlexRay Series Networks Suermann Thomas NXP Semiconductors FlexRay Product Day Böblingen 2006
- TJA1080 Application Notes Philips Semiconductor