Mobile IP roaming between internal and external networks
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Dec 4, 2003
app pub date -
May 17, 2002
filing date -
Mar 5, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A method and apparatus for registering a mobile node with a home agent are disclosed. The invention uses a Mobile IP proxy to inform the mobile node of whether the mobile node is in an internal network or a remote network. The mobile node sends out a registration request. From the registration request, the Mobile IP proxy determines whether the mobile node is in the internal network or a remote network. In accordance with one embodiment, the Mobile IP proxy sends a notification when the mobile node is in the internal network. For instance, the notification may be provided in an extension to a registration reply. In addition, a home agent may be assigned and identified in the registration reply. This notification may then be used by both a foreign agent to which the mobile node has roamed and the mobile node to update its information for the mobile node. If the mobile node is in a remote network, the Mobile IP proxy acts as an intermediary, creating tunnels to the care-of address and the home agent. Otherwise, the Mobile IP proxy can allow the mobile node and the home agent to communicate with each other without using the Mobile IP proxy as an intermediary.
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