Patent ID: 6226498
Filing Date: 2001-05-01
Classification: H04L,H04W

Abstract:
A method for monitoring communications links, the method which comprises:providing, in a mobile radio system, a mobile switching center connected to at least one of a further mobile switching center and a communications network;assigning, with a radio network management device, radio resources to a communications link within a geographical subarea, the radio network management device being connected to a base station for transmitting and receiving information via the communications link to/from a mobile station of a mobile subscriber located in the geographical subarea;storing a correspondence table in an interception unit of the mobile switching center, and assigning, in the correspondence table, a local area code of the geographical subarea to an authorization organization number of an authorization organization, the authorization organization being one of a regional, a national and an international authorization organization;storing a supervision file in the interception unit, and entering, into the supervision file, an international mobile subscriber number for the mobile subscriber to be monitored by the authorization organization;using the correspondence table for determining whether the authorization organization is authorized to monitor the communications link in the geographical subarea identified by the local area code, if an attempt to set up a connection from/to the mobile station of the mobile subscriber is made;assigning the authorization organization number to the international mobile subscriber number in the supervision file when an authorization for monitoring exists; andrecording one of information transmitted from the mobile station and information received by the mobile station via the communications link.