Infrequent event trace
First Claim
Patent Images
1. A protocol analyzer for a communication link comprising:
- input means for receiving communication frames from a communication link, said communication frames having plural identifiable distinctive frame events;
first filter means for identifying a plurality of said distinctive frame events, from said input means, each of which has an occurrence below a preselected frequency; and
output means for selectively displaying only the plurality of distinctive frame events identified by said first filter means.
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Abstract
Protocol analysis is performed by identifying frame events of communication frames from a communication link, and determining which frame events have an occurrence below a preselected frequency. The results are displayed. The frame events having an occurrence below the preselected frequency are determined by counting the occurrence of each type of frame event for a preselected period and comparing against a count of the preselected periods. The frame event may be any of the plurality of data fields for a communication frame, the occurrence of a sequence or pairs of communications frames, or the time periods between pairs of communication frames.
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Citations
20 Claims
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1. A protocol analyzer for a communication link comprising:
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input means for receiving communication frames from a communication link, said communication frames having plural identifiable distinctive frame events; first filter means for identifying a plurality of said distinctive frame events, from said input means, each of which has an occurrence below a preselected frequency; and
output means for selectively displaying only the plurality of distinctive frame events identified by said first filter means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of protocol analysis comprising:
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identifying a plurality of distinctive frame events in communication frames from a communication link, said communication frames having plural identifiable distinctive frame events; determining a plurality of identified distinctive frame events which each has an occurrence below a preselected frequency; and selectively displaying only the determined frame events. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification