Patent ID: 6751664
Filing Date: 2004-06-15
Classification: H04L

Abstract:
A method for monitoring an IP data network within which there is at least one access router connected by at least one uplink to another backbone element, comprising the steps of:measuring, on a granular basis, the bandwidth utilization of each uplink which connects the access router to said other element; and verifying bandwidth fulfillment at each access router by comparing the measured mean uplink utilization to a prescribed threshold value, wherein the bandwidth fulfillment is determined in accordance with inequality m+qs<1, with m and s2 being empirical values for mean and variance, respectively, calculated from the measurements of the uplink utilization during peak time intervals, and with q=q&agr;, where q&agr; is defined by &PHgr;(q&agr;)=1âˆ’&agr; where &PHgr; (x) is the standard normal distribution with mean=0 and variance=1, and &agr; is a parameter between 0 and 1 defined by a desired confidence level (1âˆ’&agr;)Ã—100%.