Fault localization and health indication for a controller area network
First Claim
1. A method of determining health of a network comprising the following steps:
- a) determining a number of error messages transmitted over the network;
b) determining a number of valid messages transmitted over the network; and
,c) comparing the number of error messages to the number of valid messages in order to determine the health of the network.
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Accused Products
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.
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Citations
23 Claims
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1. A method of determining health of a network comprising the following steps:
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a) determining a number of error messages transmitted over the network; b) determining a number of valid messages transmitted over the network; and
,c) comparing the number of error messages to the number of valid messages in order to determine the health of the network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A node of a network comprising:
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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 produce a count of valid messages and to compare the error message count to the valid message count so as to determine the health of the network. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification