Patent ID: 6981047
Filing Date: 2005-12-27
Classification: H04L,H04W

Abstract:
1. A method for enabling secure data communication with a computing device that roams among plural data communication networks or subnetworks of the type that carry Internet Protocol (IP) data, said method comprising: establishing access to at least one data communications network or subnetwork carrying IP data; using said network or subnetwork to institute secure data communications between said computing device and another computing device; upon said computing device roaming while operational to a further network or subnetwork carrying IP data, establishing access at the computing device with said further network or subnetwork to enable said computing device to communicate over said further network or subnetwork; participating in a DHCP process with said further network or subnetwork; learning, at least in part in response to said DHCP process, that said computing device is enabled to communicate over said further network or subnetwork; based at least in part on said learning, informing said another computing device that said computing device has roamed and has access to said further network or subnetwork; and using said access to said further network or subnetwork to continue said secure data communications between the computing device and said another computing device.