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Thanks to its distributed and asynchronous medium access control mechanism, CAN is the ideal choice for interconnecting devices in event-driven systems. When timing requirements of applications are not particularly demanding, as in the case of, e.g., reactive and proactive maintenance, constraints on event delivery can be relaxed, so that their notification may rely on best-effort approaches. In this...
The ever-increasing variety of services built on top of the Controller Area Network (CAN), along with the recent discovery of vulnerabilities in CAN-based automotive systems (some of them demonstrated in practice), stimulated a renewed attention to security-oriented enhancements of the CAN protocol. The issue is further compounded nowadays because, unlike in the past, security can no longer be enforced...
To overcome the performance limitations of Controller Area Network (CAN), the CAN with Flexible Data-rate (CAN FD) specification has been recently released, which features increased network throughput by combining bit rate overclocking and frame oversizing. CAN FD ensures good backward compatibility with existing applications and higher protocol layers conceived for CAN. Unfortunately, high-performance...
The bit stuffing mechanism adopted in controller area networks leads to unwanted jitter on frame reception times, which worsens timing accuracy, even if countermeasures are adopted to avoid contentions on the bus. Several solutions have been proposed so far for dealing with stuff bits in the payload of messages, but they are not effective for the cyclic redundancy check. In this paper, a mechanism...
The MODBUS protocol is nowadays very popular at both the field and SCADA levels, thanks to its simplicity and its open nature. However, the choice of physical transmission medium is currently limited to either the low-performance TIA/EIA-485 bus (MODBUS RTU) or Ethernet (MODBUS TCP), with its topology and cabling shortcomings and additional software complexity. In this paper, a MODBUS adaptation layer...
Although the Controller Area Network (CAN) technology is very mature, the behavior of real CAN controllers under marginal operating conditions is still of practical interest as CAN is being deployed in a variety of application domains. In this paper, we propose a test software architecture able to extensively investigate the reaction of a typical CAN controller when subject to various kinds of error...
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