Abstract
Controller area network (CAN) is a widely-used bus protocol in automotive distributed embedded systems, but its limited communication bandwidth (up to 1 Mbps) and payload size (up to 8 Bytes) limit its applicability in today’s increasingly complex automotive electrical/electronic systems. CAN with flexible data rate (CAN-FD) is an improved CAN-based communication protocol, with higher communication bandwidth (up to 8 Mbps for the payload) and increased payload size (up to 64 Bytes). In this paper, we perform analytical and experimental performance comparisons of CAN-FD bus with conventional CAN bus. We consider a message set obtained by reverse-engineering a real CAN -based system, with additional high-priority interference messages for stress-testing the system with different bus loads. We also consider a networked control system based on the message set, and analyze the control system performance measured by step responses under different bus loads. Experimental results validate the performance advantages of CAN-FD over conventional CAN bus.
Highlights
The upcoming automotive functionalities, such as advanced drive assistance systems, will require dependability attributes, such as safety, security, reliability, and availability [1]
Faults generate errors on transmitted messages, by corrupting their contents, such that, in order to recover from those situations, fieldbus networks implement several fault-tolerant mechanisms. This leads to communication overload due to delivery delays in messages, which impacts the performance of the control system
When messages have realtime requirements, which is common in control systems, these problems can seriously disturb its operation and lead to failure
Summary
The upcoming automotive functionalities, such as advanced drive assistance systems, will require dependability attributes, such as safety, security, reliability, and availability [1]. In order to address those requirements, CAN-FD, which has been recently developed, allows higher rates and payloads This new protocol has controllers that perform standard CAN communication, representing a new alternative for future automotive systems [4]. R. De Andrade et al.: Analytical and Experimental Performance Evaluations of CAN-FD Bus. CAN-based higher layer protocols with high data throughput, CAN (Controller Area Network) technology provides a bandwidth up to 1 Mbps and payload up to 8 Bytes, that for is overloaded and cannot address the demand for the generation of automotive electronic systems. It can be extended for the diagnostic and end-of-line target.
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Published Version
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