Patent ID: 8706089

Claim:
A method for managing the detection by a Law Enforcement Monitoring Facility (LEMF) of changes of mobile station ID information of a target identity in a telecommunications network, the method comprising the steps of: providing a node selected between an Intercept Control Element (ICE) and a Data Retention Source; at said node, comparing current mobile station ID information with previously stored mobile station ID information, wherein said mobile station ID information is at least one of an International Mobile Subscriber Identity (IMSI), an International Mobile Equipment Identity (IMEI) or a combination thereof: at said node, preparing a notification message including both said previous mobile station ID information and said current mobile station ID information, if in said comparing step it is detected that the mobile station ID information has changed; at said node, sending said notification message to an Administration Function (ADMF) which verifies, in response to said notification message, the existence of warrants related to said previous mobile station ID information, automatically generating an updated warrant based on said current mobile station ID information, and automatically deactivating existing warrants related to said previous mobile station ID information; informing said LEMF about said updated warrant.