Patent ID: 6556831
Filing Date: 2003-04-29
Classification: H04M,H04W

Abstract:
Telecommunication system for providing a call between a first subscriber station (2) and a second subscriber station (3,4,5) wherein the first subscriber station is a mobile subscriber station which is connected to a first mobile radio telecommunication network (6), comprising:location information extracting means (9) for extracting location information indicating a current location of the first mobile subscriber station (2) in the first mobile radio telecommunication network (6) from network information available in the first mobile radio telecommunication network (6); location information providing means (10) for providing said location information to the second subscriber station (3,4,5) in response to a request requesting said location information; geographical area determining means (12) for determining whether the first subscriber station is located within a predetermined geographical area; and routing means (13) for routing a call set-up request to the first subscriber station to set up a call between the first subscriber station (2) and the second subscriber station (3) only if the first subscriber station is within the predetermined geographical area.