Fault localization and health indication for a controller area network
US6442708B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1999 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Dec 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/0677
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A node of a network comprises an error message detector arranged to detect error messages transmitted over the network, a counter arranged to count the error messages in order to produce an error message count, and a controller arranged to count valid messages in order to produce a count of valid messages. The controller is arranged to compare the error message count to the valid message count to indicate the health of the network. The node further comprises a transceiver, a controller coupled to the transceiver by a receive line and a transmit line, and error message first logic coupled to the receive and transmit lines. The error message first logic is arranged to detect a first error message from the receive line and a second error message from the transmit line, and to determine whether the node is closest to a fault by comparing timing between the first error message and the second error message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.