Layer-2 IP networking method and apparatus for mobile hosts

摘要

A method and apparatus to enable IP networking for mobile hosts without requiring changes to be made to the TCP/IP stack in the operating system installed on the mobile hosts. The apparatus is an “intelligent device” that can be installed on or connected to a mobile host, and may comprise a software-only logical module, physical hardware, or a combination of both. To a mobile host, the intelligent device emulates a network interface such as an Ethernet card or a telephone modem. The intelligent device appears to an access network just like any regular IP host connected to the access network through a physical network interface device. The intelligent device handles all mobile networking functions for the mobile host, and may control multiple different physical network interface devices to enable a connection to an access network available to the mobile user at his location.

主权项

1. A device comprising:
a processor; and a non-transitory computer-readable medium storing instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising:
receiving a request message from an access device;sending an access request to an access network;receiving a response to the access request from the access network with a first internet protocol address for the access device;selecting a second internet protocol address in a same subnet as the first internet protocol address for the access device; andsending a reply message to the access device with the second internet protocol address as a source internet protocol address and the first internet protocol address as a destination internet protocol address.