Method of transferring between switching exchanges for mobile services, the handling of an active connection

Claim 1

Method of transferring between centres the handling of an active connection between a user (13), on the one hand, and a mobile terminal (1) on the other hand, in a telecommunication system designed for mobile communication, comprising at least one mobile terminal, a first (2) and a second (3) switching centre designed for mobile services and each having a working region with a limited range, and a section of a network designed for nonmobile telecommunication, which section is able to interact with the switching centres, there being a first route between the first switching centre (2) and the user (13), via which first route the active connection has been set up, and there being a second route between the second switching centre (3) and the user, which routes each have at least one intelligence point (8) where connection control and call control can be handled separately, characterised in that, for a predetermined time interval, both routes are investigated for common intelligence points belonging to the first route and the second route, and - if one common intelligence point is found it is designated as a central intelligence point, - if several common intelligence points are found, an intelligence point situated nearest the first switching centre is designated as a central intelligence point, and - if no common intelligence point is found an intelligence point of the first route, which intelligence point is situated nearest the user, is designated as a central intelligence point, a connection also being set up between the central intelligence point and the second switching centre, information needed for the transfer of the handling of the active connection being transferred from at least one centre situated on the first route to at least one centre situated in the connection set up, and the connection via the first switching centre between the central intelligence point and the mobile terminal being disconnected after the active connection to the mobile terminal has been taken over by the second switching centre.