Patent ID: 6674726
Filing Date: 2004-01-06
Classification: H04L

Abstract:
A processing rate monitoring apparatus, comprising:an appearance number counter for counting the number of packets appearing within a monitoring period at a real number level for a monitored connection; and determining means, operable each time the lapse of the monitoring period is notified, to compare a count value of said appearance number counter indicating the number of packets newly counted within a current monitoring period with a delay variation allowed value to determine the presence or absence of a transmission rate violation in the current monitoring period, said delay variation allowed value being derived by adding delay variations to an allowed value for the number of appearing packets, said allowed value being calculated from a transmission rate of said monitored connection, wherein said determining means, upon proceeding to the next monitoring period, compares a first value calculated by subtracting said allowed value, having no influence of delay variations added thereto, from the count value of said appearance number counter with a second value calculated by subtracting a tolerance value having the influence of delay variations added thereto from a delay variation allowed value having no influence of delay variations added thereto, to set the larger one of said first and second values to a count value used in the next monitoring period.