Traffic detection system and communication-quality monitoring system on a network
First Claim
Patent Images
1. A traffic detection system comprising:
- a receiving unit for receiving packets configuring a traffic on a network;
frequency-distribution calculation unit for calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets; and
a traffic detection unit for comparing data of said frequency distribution calculated by said frequency-distribution calculation unit against data of an expected frequency distribution of arrival times of a subject traffic to be detected, to detect said subject traffic based on said comparison.
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Abstract
A communication-quality monitoring system includes a receiving unit for receiving packets to detect packets of a traffic, a frequency-distribution calculator for calculating frequency distribution of the arrival times of the received packets, and a degradation detection unit for detecting degradation of communication quality in the network by comparing statistic parameters of the peak in the frequency distribution against thresholds of the parameters. The parameters include a dispersion, standard deviation, half-power breadth and peak power of the peak in the distribution diagram.
39 Citations
49 Claims
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1. A traffic detection system comprising:
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a receiving unit for receiving packets configuring a traffic on a network;
frequency-distribution calculation unit for calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets; and
a traffic detection unit for comparing data of said frequency distribution calculated by said frequency-distribution calculation unit against data of an expected frequency distribution of arrival times of a subject traffic to be detected, to detect said subject traffic based on said comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 16)
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8. A traffic detection method comprising the steps of:
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receiving packets configuring a traffic on a network;
calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets; and
comparing data of said frequency distribution calculated by said frequency-distribution calculating step against data of an expected frequency distribution of arrival times of a subject traffic to be detected, to detect said subject traffic based on said comparison. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A communication-quality monitoring system comprising:
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a receiving unit for receiving packets configuring a traffic on a network;
frequency-distribution calculation unit for calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets; and
a communication quality judgement unit for comparing at lest one parameter of said frequency distribution against a threshold stored in a communication-quality-threshold memory to judge presence or absence of a degradation in a communication quality of said traffic on said network based on said comparison. - View Dependent Claims (17, 18, 19, 20, 24)
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21. A communication quality monitoring method comprising the steps of:
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receiving packets configuring a traffic on a network;
calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets;
calculating at least one parameter from said frequency distribution; and
comparing said calculated parameter calculated by said parameter calculating step against a threshold stored in a communication-quality-threshold memory to judge presence or absence of a degradation in a communication quality of said traffic on said network based on said comparison. - View Dependent Claims (22, 23, 25, 26)
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27. A communication-quality monitoring system comprising:
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a receiving unit for receiving packets configuring a traffic on a network;
frequency-distribution calculation unit for calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets;
a traffic detection unit for comparing data of said frequency distribution calculated by said frequency-distribution calculation unit against data of an expected frequency distribution of arrival times of a subject traffic to be detected, to detect said subject traffic based on said comparison; and
a communication quality judgement unit for comparing at least one parameter of said frequency distribution against a threshold stored in a communication-quality-threshold memory to judge presence or absence of a degradation in a communication quality of said traffic on said network based on said comparison. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A communication quality monitoring method comprising the steps of:
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receiving packets configuring a traffic on a network;
calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets;
comparing data of said frequency distribution calculated by said frequency-distribution calculation unit against data of an expected frequency distribution of arrival times of a subject traffic to be detected, to detect said subject traffic based on said comparison, calculating at least one parameter from said frequency distribution for said detected subject traffic; and
comparing said calculated parameter calculated by said parameter calculating step against a threshold stored in a communication-quality-threshold memory to judge presence or absence of a degradation in a communication quality of said traffic on said network based on said comparison. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A program running on a computer to operate said computer in the processings of:
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receiving packets configuring a traffic on a network;
calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets; and
comparing data of said frequency distribution calculated by said frequency-distribution calculation unit against data of an expected frequency distribution of arrival times of a subject traffic to be detected, to detect said subject traffic based on said comparison.
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48. A program running on a computer to operate said computer in the processings of:
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receiving packets configuring a traffic on a network;
calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets;
calculating at least one parameter from said frequency distribution; and
comparing said calculated parameter calculated by said parameter calculating processing against a threshold stored in a communication-quality-threshold memory to judge presence or absence of a degradation in a communication quality of said traffic on said network based on said comparison.
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49. A program running on a computer to operate said computer in the processings of:
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receiving packets configuring a traffic on a network;
calculating a frequency distribution of arrival times of said received packets based on arrival times of said received packets;
comparing data of said frequency distribution calculated by said frequency-distribution calculation unit against data of an expected frequency distribution of arrival times of a subject traffic to be detected, to detect said subject traffic based on said comparison;
calculating at least one parameter from said frequency distribution for said detected subject traffic; and
comparing said calculated parameter calculated by said parameter calculating processing against a threshold stored in a communication-quality-threshold memory to judge presence or absence of a degradation in a communication quality of said traffic on said network based on said comparison.
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Specification