Patent ID: 6785287
Filing Date: 2004-08-31
Classification: H04W

Abstract:
A method of initiating a communication which is transmitted by a packet data network, containing a gateway and a plurality of gatekeepers coupled to the gateway, to a wireless terminal in one of a plurality of wireless systems comprising:processing a message for use in initiation of the communication to determine at least one area to which the message is transmitted; identifying for the at least one area at least one associated destination gatekeeper to which the message is transmitted from the gateway to initiate the communication and to which the communication is transmitted; transmitting the message from the gateway to the at least one associated destination gatekeeper; and transmitting the message from the at least one associated destination gatekeeper to at least one of the plurality of wireless systems; and wherein the at least one associated destination gatekeeper is not all of the plurality of gatekeepers.