Patent ID: 6615261
Filing Date: 2003-09-02
Classification: H04L

Abstract:
A method for performance analysis of data networks, wherein data is collected as measurement samples v(t) from individual network elements at asynchronous sampling intervals, said data being stored in a Performance Database, wherein said database is maintained by a Performance Local Agent, which stores collected data in the database, retrieves data from the database on request from a client, normalizes said measurement samples v(t) to appear as normalized measurements v(T) sampled at exactly the same sampling times, processes the data into values that indicate the performance of the network and provides clients with a view of the resulting performance values, further wherein said measurement samples are normalized according to statistical estimation or linear interpolation method, and further wherein the sampled measurements v(t) are normalized according to the formula: v&af;(Tj)=v&af;(Ti)*(ti-Tj-1)ti-ti+1+&Sum;k=i+1n-1&it;v&af;(tk)+v&af;(tn)*(Tj-tn-1)tn-tn-1where tk denotes the actual sampling time, Tk denotes the normalized sampling time, k &egr; [0, â†’>, Tj is the time at which a measurement value is taken, ti is the first sampling time after Tj-1, and tn is the first sampling time after Tj.