Patent ID: 6233457
Filing Date: 2001-05-15
Classification: H04M,H04W

Abstract:
A method for routing call connections given respective calls directed to a called radiotelephone subscriber who is registered at least in his home network regardless of momentary location, comprising the steps of:receiving a first message, that contains a request to set up a signaling connection and information identifying the called radiotelephone subscriber, by a first switching center in a first network;sending a second message for a connection setup from the first switching center to an access mobile switching center based on the information of the called radiotelephone subscriber;sending a third message for location inquiry with which the support of an optimized routing wherein a direct connection can be set up from the access mobile switching center to a visited mobile switching center from the access mobile switching center to the home network of the called radiotelephone subscriber in an internetework manner;providing by the home network a destination address and sending the destination address in a fourth message to the access mobile switching center in inter-network manner, the access mobile switching center setting up the direct connection to the visited mobile switching center; andupon receipt of a fifth message that signals creation of the call connection, inserting via the access mobile switching center the destination address into the fifth message and returning the fifth message to the first switching center, which interprets the destination address for charging for the call connection.