MONITORING DEVICE MONITORING NETWORK
First Claim
1. A monitoring device configured to monitor a network connected to a plurality of controllers, the monitoring device comprising:
- a decoder configured to extract target data belonging to a target data group from data received from the plurality of controllers;
a first comparator configured to determine whether an immutable part of the target data is known or anomalous;
a second comparator configured to determine whether a reception interval of the target data group is normal or anomalous;
a third comparator configured to determine whether a number of the target data received and included in the target data group is normal or anomalous, and determine whether each reception interval between the target data is normal or anomalous; and
a warning counter configured to individually count a number of anomalies determined by the first comparator, a number of anomalies determined by the second comparator, and a number of anomalies determined by the third comparator.
1 Assignment
0 Petitions
Accused Products
Abstract
A monitoring device configured to monitor a network to which plural controllers are connected which includes a decoder configured to extract target data belonging to a target data group from data received from the plural controllers, a first comparator configured to determine whether an immutable part of the target data is known or anomalous, a second comparator configured to determine whether a reception interval of the target data group is normal or anomalous, a third comparator configured to determine whether the number of the target data having been received and included in the target data group is normal or anomalous, and determine whether each reception interval between the target data is normal or anomalous, and a warning counter configured to individually count the number of anomalies determined by the first comparator, the number of anomalies determined by the second comparator, and the number of anomalies determined by the third comparator.
9 Citations
10 Claims
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1. A monitoring device configured to monitor a network connected to a plurality of controllers, the monitoring device comprising:
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a decoder configured to extract target data belonging to a target data group from data received from the plurality of controllers; a first comparator configured to determine whether an immutable part of the target data is known or anomalous; a second comparator configured to determine whether a reception interval of the target data group is normal or anomalous; a third comparator configured to determine whether a number of the target data received and included in the target data group is normal or anomalous, and determine whether each reception interval between the target data is normal or anomalous; and a warning counter configured to individually count a number of anomalies determined by the first comparator, a number of anomalies determined by the second comparator, and a number of anomalies determined by the third comparator. - View Dependent Claims (2, 3, 4)
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5. A semiconductor integrated circuit, comprising:
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a decoder; a plurality of comparators; and a warning counter, wherein; the decoder is configured to extract target data belonging to a target data group from data received from an outside; a first comparator of the plurality of comparators is configured to determine whether an immutable part of the target data is known or anomalous; a second comparator of the plurality of comparators is configured to determine whether a reception interval of the target data group is normal or anomalous; a third comparator of the plurality of comparators is configured to determine whether a number of the target data having been received and included in the target data group is normal or anomalous and each reception interval between the target data is normal or anomalous; and the warning counter is configured to individually count a number of anomalies determined by the first comparator, a number of anomalies determined by the second comparator, and a number of anomalies determined by the third comparator. - View Dependent Claims (6)
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7. A network device, comprising:
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a plurality of controllers; and a monitoring device configured to monitor data output from each of the plurality of controllers, wherein the monitoring device comprises; a decoder configured to extract target data belonging to a target data group from data received from the plurality of controllers; a first comparator configured to determine whether an immutable part of the target data is known or anomalous; a second comparator configured to determine whether a reception interval of the target data group is normal or anomalous; a third comparator configured to determine whether a number of the target data having been received and included in the target data group is normal or anomalous, and each reception interval between the target data is normal or anomalous; and a warning counter configured to individually count a number of anomalies determined by the first comparator, a number of anomalies determined by the second comparator, and a number of anomalies determined by the third comparator. - View Dependent Claims (8, 9, 10)
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Specification