Real-time Controller Area Networks (CAN) -- managing transient surges

Richardson, Paul; Sieh, L.; Elkateeb, Ali; Haniak, Peter

doi:10.3233/ica-2002-9205

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…Obviously, routing is performed by the gateway for three different constellations, namely from CAN to CAN (1), from CAN to FlexRay (2) and from FlexRay to CAN (3). The aspects we expect to be relevant for the actual routing delay are the waiting time for CSMA/BA media access for a CAN message of certain priority in (1) and (3) and the delay from the point of time when data is ready to be sent to FlexRay from the gateway until the next dedicated time slot begins in scenario (2). We picked out several messages for which we determined the routing delay according to the strategy as described beforehand.…”

Section: A Communication System Configurationmentioning

confidence: 99%

“…Timing aspects of CAN have been investigated analytically in [2], using the Earliest Deadline First algorithm, in [3] with Response Time Analysis or in [4], applying Network Calculus. These approaches yield valid results for upper delay bounds; however, the use-case behavior of data transmission in real vehicles can not be anticipated with worst-case analytics.…”

Section: Related Workmentioning

confidence: 99%

“…every 50 milliseconds, in order to broadcast information 2. If the FlexRay cycle is 1/n-th of the CAN cycle, the same message is sent n times from the gateway to the sink bus.…”

mentioning

confidence: 99%

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Routing of Safety-Relevant Messages in Automotive ECU Networks

Herpel

Kloiber

German

et al. 2009

2009 IEEE 70th Vehicular Technology Conference Fall

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Modern cars comprise tens of electronic control units, serving for various purposes like entertainment, driver's comfort or occupant protection. To connect these networked embedded systems inside the car, widespread bus systems like CAN or FlexRay are used, each one offering projecting abilities and specific limitations for certain application areas. In order to point out the suitability of a certain in-car network topology for the transmission of highly time-and safety-critical data content, we investigated effects of routing by a central gateway on the communication delay. In cooperation with the German car manufacturer Audi, we installed a prototype measurement infrastructure and collected meaningful communication data samples for up-to-date and future in-car networks. The results we obtained from the data samples allow for a sophisticated evaluation of the in-car communication network with respect to the demands of time-and safety-critical functions at an early stage of system development.

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Section: A Communication System Configurationmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%