23/04/2019 by Kvaser

New white paper discusses ways to maximise CAN’s efficiency in next generation vehicles

Virtual CAN FD Bus

Lars Berno Fredriksson, president of Kvaser AB and chairman of the J1939 Next Generation Task Force, has published a white paper discussing a technique for multiplexing CAN with another protocol to meet the high-speed, high data volumes required by next generation heavy duty vehicles. 

This white paper is based on a presentation that was made to SAE’s J1939 NextGen committee in September 2018. The paper proposes a theoretical solution to CAN’s low bandwidth, suggesting that a Virtual CAN Converter (VCC) cooperates with the standard CAN Controller in instances where it would be beneficial to transmit CAN information on a high-speed physical layer, such as Ethernet. By employing a VCC that multiplexes CAN with another protocol with a higher bitrate for requirements other than system control, CAN’s many unique advantages would be retained, including the independency of the design and execution of control tasks, and a faster bitrate could be achieved.

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Feedback on this whitepaper is welcome. Please email with your comments.