Patent ID: 6243449
Filing Date: 2001-06-05
Classification: H04M,H04Q

Abstract:
A method for handling a mass calling event (MCE) at a switch of a network, comprising the steps of, repetitively:(a) logging ineffective attempts (IAs) to terminating numbers (TNs) which are on a monitoring list;(b) sending a monitoring message to a network processor (NP) with the IA rate for each TN on said monitoring list;(c) if, based on IAs logged in step (a), an IA rate in respect of a monitored TN is below a release threshold for a pre-determined time, removing said monitored TN from said monitoring list;(d) logging IAs to TNs on a suspect list, said suspect list having TNs not on said monitoring list;(e) if, based on IAs logged in step (i), an IA rate in respect of a TN exceeds an alert threshold, sending an alert message to said NP and storing said TN on said monitoring list;wherein each of (d) and (e) is undertaken during each of consecutive sampling cycles, said suspect list of (e) is a suspect list created in a sampling cycle immediately preceding a current sampling cycle and including, in said current sampling cycle:(A) logging IAs to TNs not on said preceding sampling cycle suspect list and not on said monitoring list;(B) if one or more TNs have an IA rate exceeding a threshold, transferring at least one of said one or more TNs to a current sampling cycle suspect list.