US 12,261,716 B2
Controller area network system and a method for the system
Thierry G. C. Walrant, Bouge (BE); Georg Olma, Grasbrunn (DE); and Karthik Sivaramakrishnan, Eindhoven (NL)
Assigned to NXP B.V., Eindhoven (NL)
Filed by NXP B.V., Eindhoven (NL)
Filed on Sep. 5, 2023, as Appl. No. 18/461,312.
Claims priority of application No. 22196969 (EP), filed on Sep. 21, 2022.
Prior Publication US 2024/0097935 A1, Mar. 21, 2024
Int. Cl. H04L 12/40 (2006.01)
CPC H04L 12/40006 (2013.01) [H04L 2012/40215 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A Controller Area Network (CAN) system comprising:
a first CAN device, and
a monitoring device,
wherein the first CAN device comprises a first transmit data (TXD) interface, a first transmitter, a first CAN BUS interface, and a first control unit;
wherein the first control unit is configured to read out a first identifier from a first TXD message and to compare, as a first comparison, the first identifier with at least one first reference tag;
wherein the first CAN device is configured to generate a first CAN BUS signal based on the first TXD message via the first transmitter at the first CAN BUS interface, such that the first CAN BUS signal represents at least a first part of the first TXD message;
wherein the first control unit is configured, if a result of the first comparison indicates that the first identifier does not correspond to any of the at least one first reference tag, to invalidate a representation of the first TXD message by the first CAN BUS signal and to prevent, for a predetermined first interruption time, a CAN BUS signal from being generated by the first CAN device at the first CAN BUS interface, and
wherein the monitoring device is configured to receive an instruction message over a CAN BUS network from a second CAN device and to test for reachability to any CAN device coupled to the CAN BUS network in response to the instruction message.