Patent ID: 11924003
Assignee: CANIS AUTOMOTIVE LABS LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 7:
8. A method of communicating data over a controller area network bus within a serial communication system comprising a security slave device located between a first system node and said controller area network bus comprising:
inserting first node indicator data, indicative of a first node, into a controller area network frame received from said first system node;
extracting said first node indicator data from said controller area network frame received from said controller area network bus, via a security master device located between said controller area network bus and a second system node;
communicating said first node indicator data extracted from said controller area network frame to a security supervisor located in said second system node;
checking the validity of said first node indicator data extracted from said controller area network frame received by said security supervisor;
communicating an invalidity signal from said security supervisor to said security master device whenever said first node indicator data is not valid;
generating a disconnect signal from said security master device, in response to said invalidity signal, that is communicated to said security slave device that disconnects said first node from said controller area network bus.