Method and apparatus for isolating a fault-active controller in a controller area network

摘要

A method for monitoring communications among a plurality of controllers signally linked to a communication bus of a controller area network includes monitoring bus communications including determining bus error counts for a plurality of execution cycles. When a bus error count associated with message transmission from one of the controllers exceeds a predetermined threshold, the one of the controllers is prohibited from communicating on the communications bus for a predetermined period of time and is included in a subset of candidate fault-active controllers. Any of the plurality of controllers included within the subset of candidate fault-active controllers that successfully transmits a message is removed from the subset of candidate fault-active controllers. A fault-active controller is isolated based upon the subset of candidate fault-active controllers and the bus error counts.

主权项

1. Method for monitoring communications among a plurality of controllers signally linked to a communication bus of a controller area network, comprising:
monitoring bus communications including determining bus error counts for a plurality of execution cycles; when a bus error count associated with message transmission from one of the controllers exceeds a predetermined threshold, prohibiting said one of the controllers from communicating on the communications bus for a predetermined period of time and including said one of the controllers in a subset of candidate fault-active controllers; removing from the subset of candidate fault-active controllers any of the plurality of controllers included within the subset of candidate fault-active controllers that successfully transmits a message; and isolating a fault-active controller based upon the subset of candidate fault-active controllers and the bus error counts.