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

Claim 0:
1. A serial communication system for communicating data over a controller area network bus comprising:
a security slave device located between a first system node and said controller area network bus comprising:
a tagging device that inserts first node indicator data, identifying said first node in a controller area network frame received at said security slave device from said first node, said first node indicator data comprising fast tag bits in a control field of said controller area network frame;
a security master device, located between said controller area network bus and a second system node, said security master device configured to extract said first node indicator data from said controller area network frame, said security master device further configured to communicate said first node indicator data extracted from said controller area network frame to a security supervisor located in a second system node;
said security supervisor configured to receive said first node indicator data extracted from said controller area network frame and check the validity of said first node indicator data extracted from said controller area network frame received by said security supervisor, said security supervisor further configured to provide an invalidity signal which is communicated to said security master device whenever said first node indicator data is not valid, and generate a disconnect signal that is communicated to said security slave device that disconnects said first node from said controller area network bus.