Calculating controller area network (can) message response times
نویسندگان
چکیده
منابع مشابه
Calculating Controller Area Network (can) Message Response Times
Controller Area Network (CAN) is a well designed communications bus for sending and receiving short real-time control messages at speeds of up to 1Mbit/sec. One of the perceived drawbacks to CAN has been the inability to bound accurately the worst-case response time of a given message (i.e. the longest time between queueing the message and the message arriving at the destination processors). Th...
متن کاملMessage response time analysis for ideal controller area network (CAN) refuted
This paper revisits basic message response time analysis of controller area network (CAN). We show that existing message response time analysis, as presented in [10], is optimistic. Assuming discrete scheduling, the problem can be resolved by applying worst-case response time analysis for fixed-priority non-preemptive scheduling (FPNS) as described in [4].
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The Controller Area Network has a maximum transmission rate of 1 Mbitk and its fixed priorities-based medium access control limits the maximum bus utilisation when timeliness guarantees are required. An implementation of earliest deadline first (EDF) message scheduling on CAN, based on the F’IT CAN protocol, is presented, which allows higher utilisation factors with timeliness guarantees. The a...
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A generally perceived problem with CAN is that it is unable to guarantee the timing performance of lower priority messages. Recent work has developed analysis to bound message latencies under arbitrary error rate assumptions. Messages are permitted to be periodic or sporadic, with few restrictions on deadlines. The analysis can give optimal identifier orderings, and be used to ask “what if” que...
متن کاملImpact Case Study: Guaranteed Performance on Controller Area Network (CAN)
Controller Area Network (CAN) is a digital communications bus used by the automotive industry for invehicle networks. Research from the Real-Time Systems Group at the University of York introduced techniques that enable CAN to operate under high loads (approx. 80% utilisation) while ensuring that all messages meet their deadlines. The research led directly to the development of commercial produ...
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ژورنال
عنوان ژورنال: Control Engineering Practice
سال: 1995
ISSN: 0967-0661
DOI: 10.1016/0967-0661(95)00112-8