Patent ID: 8321504

Claim:
A method for monitoring a base of subscribers in an IP data network, the method comprising: collecting by means of at least one monitoring probe real time data from IP data sessions; extracting by means of a computer implemented filtering system information from said real time data, the information comprising at least a unique identifier and a timestamp; transmitting said information from the computer implemented filtering system to a subscribers' base system, the subscribers' base system comprising a database of subscribers for storing a plurality of subscriber records and a computer implemented processing unit, each subscriber record comprising a unique identifier for the subscriber record; querying by means of the computer implemented processing unit the database of subscribers with the unique identifier comprised in the extracted information to correlate the unique identifier comprised in the extracted information with a corresponding subscriber record; updating by means of the computer implemented processing unit the subscriber record with the extracted information, or alternatively creating by means of the computer implemented processing unit a new subscriber record based on the extracted information when no corresponding subscriber record is found in the database of subscribers; and allocating by means of the computer implemented processing unit to each subscriber record a label and a timestamp of when the label was allocated, the label being allocated based on the extracted information; wherein a label new is allocated to a subscriber record upon creation in the database of subscribers, and a label upgraded is allocated to a subscriber record for which the extracted information indicates that a new terminal is used for this subscriber record.