802.11 using a compressed reassociation exchange to facilitate fast handoff
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United States of America Patent
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Mar 25, 2008
Grant Date -
May 27, 2004
app pub date -
Apr 17, 2003
filing date -
Nov 26, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and system for handling roaming mobile nodes in a wireless network. The system uses a Subnet Context Manager to store current Network session keys, security policy and duration of the session (e.g. session timeout) for mobile nodes, which is established when the mobile node is initially authenticated. Pairwise transit keys are derived from the network session key. The Subnet Context Manager handles subsequent reassociation requests. When a mobile node roams to a new access point, the access point obtains the network session key from the Subnet Context Manager and validates the mobile node by computing a new pairwise transient key from the network session key.
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