Method for supporting mobility for dynamic windows clients in a wireless LAN network
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United States of America Patent
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Jun 1, 2010
Grant Date -
Apr 26, 2007
app pub date -
Oct 24, 2005
filing date -
Oct 24, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and apparatus for preventing an IP address from being assigned to a client implementing a protocol such as DHCP are disclosed. This is particularly useful in an environment such as a Mobile IP environment in which a network device (e.g., Access Point) performs proxy registration on behalf of the client. When the client transmits a detection packet to detect whether its IP address is still valid (e.g., whether it is on the same sub-network on which the IP address was allocated), a response is transmitted to the client that indicates that the client is still on its home network. This response is transmitted regardless of whether the client is still on its home network. Since the client believes it is still on its home network, a new IP address will not be assigned to the client. As a result, an existing Mobile IP session will not be interrupted.
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