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Guaranteed Timing Behavior Begins with an Established Ethernet Backbone
Technical Paper
2016-01-0061
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Increasingly, Ethernet is being used in automotive as a vehicle network backbone. It is ideal for service-oriented communications; streamed communications, such as Audio/Video Bridging (AVB) [1]; and Diagnostics over Internet Protocol (DoIP) [2] communications - areas in which high-bandwidth and reliable performance are essential.
Designers are accustomed to network communication systems CAN, LIN, and FlexRay, but how will the timing performance be verified in an Ethernet network? This paper looks at network-wide timing analysis challenges where a mixture of CAN, FlexRay, and Ethernetbased busses co-exist.
It is also worth noting that the AUTOSAR standard [3] supports timing definition for all elements in a mixed topology network, but again, accounting for the many different timing paths is a non-trivial process.
Due to features are distributed in the vehicle, the communication need is typically tightly related to the feature complexity. Also different features have also requirements of isolation from other features, for example infotainment communication may need to be isolated from dynamic chassis control.
One efficient way to design the topology in the vehicle is to have a backbone with different domain sub-networks (Figure 1). This allows the designer to isolate different domains and keep control over the communication.
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Citation
Kallerdahl, A. and Salah, M., "Guaranteed Timing Behavior Begins with an Established Ethernet Backbone," SAE Technical Paper 2016-01-0061, 2016, https://doi.org/10.4271/2016-01-0061.Also In
References
- http://www.ieee802.org/1/pages/tsn.html
- ISO 13400
- http://AUTOSAR.org/
- http://some-ip.com/
- Specification of PDU Router
- http://www.opensig.org/
- Specification of TCP/IP Stack
- http://avnu.org/
- Cruz , Rene L. A Calculus for Network Delay
- George , Martin , and Minet Non-preemptive Fixed Priority scheduling with FIFO arbitration: uniprocessor and distributed cases
- Jonsson , Kallerdahl , and Kunert Analyzing AFDX Networks Using End-to-end Response Time Analysis