Patent ID: 6526033
Filing Date: 2003-02-25
Classification: H04L,H04W

Abstract:
A method to bypass Global Systems for Mobile Communications (GSM) Memorandum of Understanding (MoU) to provide basic cellular call delivery service via an Internet Protocol (IP) tunnel comprising a first end and a second end, for a user having a mobile device and subscribing to a home wireless service provider serving a home wireless network, wherein the user roams to visit an area served by a visited wireless service provider serving a visited wireless network distinct and separate from the home wireless network, wherein there does not exist a pre-arranged GSM MoU between the home wireless service provider and the visited wireless service provider, and wherein the user has a payment means to pay for the basic cellular call delivery service, the method comprising:registering with a network of a voice and data service provider's network to establish the first end of the IP tunnel within a Home Agent (HA) in a home H.323 server; identifying the user's payment means to the visited wireless network; registering with a visited H.323 server comprising at least a Foreign Agent (FA) in the visited wireless network to establish the second end of the IP tunnel within the FA; and delivering calls to the user's mobile device via the IP tunnel, wherein the step of registering with a voice and data service provider's network to establish the first end of the IP tunnel within a Home Agent (HA) in a home H.323 server further comprises:setting up call forwarding from the home wireless network to the voice and data service provider's network; and obtaining a Mobile IP shared secret from the voice and data service provider's network, wherein the step of setting up call forwarding from the home wireless network to the voice and data service provider's network further comprises:obtaining a telephone number for call forwarding from the voice and data service provider; and obtaining the IP address of the HA in the home H.323 server from the voice and data service provider, wherein the step of registering with a visited H.323 server in the visited wireless network to establish the second end of the IP tunnel within the FA further comprises:obtaining a dynamic IP address from the home H.323 server by the visited H.323 server using Dynamic Host Configuration Protocol (DHCP); relaying the dynamic IP address from the home H.323 server via the visited wireless network to the user's mobile device; authenticating the connection by the user's mobile device using the Mobile IP shared secret; and establishing the IP tunnel by the user's mobile device.