Mobile internet protocol for mobility of access hosts between networks
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United States of America Patent
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-
Nov 19, 2002
Grant Date -
Oct 3, 2002
app pub date -
Dec 10, 1998
filing date -
Dec 18, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method of enabling roaming of a mobile internet-access terminal from a first to a second internet access network each of which has a home agent for routing internet datagrams between networks. The method comprises de-registering the mobile terminal from said first network and registering it with said second network and allocating to the mobile terminal a new internet address in said second network. This new internet address is transmitted to the first network's home agent which registers that address as a care-of-address or co-located care-of-address for the mobile host. Datagrams addressed to the new internet address are sent directly to the mobile host via the second network's home agent. Datagrams addressed to a previous internet address of the mobile terminal in said first network are forwarded from that network's home agent to the mobile host, via the second network's home agent.
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