a method establishes a connection between a source network with a source network resource manager and a target network with a target network resource manager . according to the method , a connection control unit of the source network transmits a connection establishment signal to a connection control unit of the target network and — parallel to this — a reservation request to the target network resource manager . the target network resource reserves the requested resources and forwards the reservation request towards the target network resource manager , which also reserves the requested resources and transmits reservation information regarding the success of the resource reservations to the connection control unit of the target network .