Patent ID: 6839328
Filing Date: 2005-01-04
Classification: H04L

Abstract:
1. A method for measuring data loss rate in a network having an ingress network element and an egress network element comprising the steps of: inputting counter data measuring the data count into the network at the ingress network element; inputting counter data measuring the data count out of the network at the egress network element; calculating the difference between the data count into the network and the data count out of the network for each of a plurality of predetermined intervals to generate a data difference signal; applying a low pass filter to the data difference signal to generate a filtered data difference signal; calculating the standard deviation of the filtered data difference signal using data immediately prior to a predetermined window; calculating the data loss rate based on the filtered data difference signal in the predetermined window; and, reporting the data loss rate if the data loss rate exceeds a predetermined detectability threshold based on the computed standard deviation of the filtered difference signal.