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Fault detection and mitigation for in-vehicle LAN network management

  • US 8,665,700 B2
  • Filed: 02/06/2012
  • Issued: 03/04/2014
  • Est. Priority Date: 02/06/2012
  • Status: Active Grant
First Claim
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1. A method of detecting and mitigating an unintended active state of an in-vehicle communication network, the in-vehicle communication network including a plurality of electronic control units (ECUs) communicating over a controller area network bus system, each ECU includes both transmitting and receiving capabilities, and is configured with a communication protocol that provides guidelines for exchanging messages with other ECUs within the communication system, each ECU entering a communication kernel active state for communicating on the bus, the method comprising the steps of:

  • (a) identifying virtual networks within the communication system, each virtual network including a collection of signals involving respective ECUs whose transmission and reception are started and stopped collectively as a unit;

    (b) detecting an active virtual network;

    (c) determining that the virtual network is not a network-activated virtual network;

    (d) determining that the active virtual network is not activated by a local ECU;

    (e) determining that the active virtual network is not activated by a local application;

    (f) identifying that the active virtual network is active by fault in response to each of the determinations in steps (c), (d), and (e); and

    (g) deactivating the faulty active virtual network.

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