Achieving round-robin access in controller area networks

Because of their low implementation costs, optimum responsiveness, and widespread availability, controller area networks (CANS) are being used more and more today to support communications in real-time systems. However, under heavy traffic conditions the CAN access protocol may exhibit a quite unfai...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2002-12, Vol.49 (6), p.1202-1213
Main Authors: Cena, G., Valenzano, A.
Format: Article
Language:English
Subjects:
Access control
Access protocols
Availability
Communication system control
Communication system traffic control
Control systems
Controller area network
Cost function
Delay
Intelligent networks
Multiaccess communication
Optimization
Preserves
Real time systems
Switches
Traffic engineering
Traffic flow
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Summary:Because of their low implementation costs, optimum responsiveness, and widespread availability, controller area networks (CANS) are being used more and more today to support communications in real-time systems. However, under heavy traffic conditions the CAN access protocol may exhibit a quite unfair behavior, in particular, when the control applications require the same quality of service to be ensured to a number of different objects. In this paper, a new technique is proposed which is based on CAN and introduces few changes to the original protocol. Such a solution is able to ensure a very fair behavior-which resembles the one obtained in token-based networks-while maintaining, at the same time, the reduced access delays typical of CAN when operating in low traffic conditions. Furthermore, it preserves an optimum degree of compatibility with the existing devices and applications based on CAN.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2002.804968