Method and system for high integrity can bus traffic supervision in safety critical application

A method of common controller area network (CAN) bus traffic supervision on a system having a common CAN bus, a first CAN chip and a second CAN chip, the first CAN chip and the second CAN chip are coupled together with the common CAN bus, the method comprising:

• comparing a first CAN frame received from the first CAN chip to a second CAN frame received from the second CAN chip within a CAN comparison period;
• and
• detecting a failure of at least the first CAN chip or the second CAN chip, wherein detecting the failure of at least the first CAN chip or the second CAN chip comprises:
• determining that the first CAN frame is not identical to the second CAN frame within the CAN comparison period.

A method of monitoring a system having a common controller area network (CAN) bus, a first CAN chip and a second CAN chip, the first CAN chip and the second CAN chip are coupled together with the common CAN bus, the method comprising:

• generating, by the system, a first data string of a first Ethernet packet;
• converting, by a first processor of a first converter, the first Ethernet packet into a CAN frame, the first converter including the first CAN chip;
• routing the CAN frame from the first CAN chip to the second CAN chip by the common CAN bus;
• converting, by a second processor of a second converter, the CAN frame into a second Ethernet packet, the second Ethernet packet including a second data string, the second converter including the second CAN chip;
• routing the second Ethernet packet to the system;
• comparing the first data string with the second data string;
• and
• detecting that a failure of at least the first CAN chip or the second CAN chip occurred, wherein detecting that the failure of at least the first CAN chip or the second CAN chip occurred comprises:
• determining that the first data string is not identical to the second data string.