Method for performing authenticated handover in a wireless...

Details Method for performing authenticated handover in a wireless... Method for performing authenticated handover in a wireless...

2007-06-26

2007-06-26

Ferguson, Keith (Department: 2618)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S328000, C370S338000, C370S332000, C370S333000, C370S334000, C370S310000, C455S436000, C455S410000, C455S411000, C455S437000, C455S438000, C455S422100, C455S426100, C380S247000, C380S277000, C380S278000, C380S281000, C380S283000, C380S249000, C380S250000

Reexamination Certificate

active

11246357

ABSTRACT:
A wireless local area network system (100) supporting mobile radio telephony reduces the time to complete an authenticated handover from one access point (104) to another (108) by a mobile station (102) by performing some of the steps normally performed upon leaving one access point while still associated with that access point. More particularly, the mobile station causes a cryptographic key (204) to be preestablished (212) for use when handing over to a new access point. The cryptographic key is derived at the mobile station, and is also derived in the WLAN infrastructure and stored until the mobile station initiates a handover.

REFERENCES:
patent: 6587680 (2003-07-01), Ala-Laurila et al.
patent: 2004/0077335 (2004-04-01), Lee et al.
patent: 2007/0064647 (2007-03-01), Prasad
Establishing PTK liveness during re-association—Nancy Cam-Winget, Cisco Systems, Inc. Emily H. Qi and Jesse Walker, Intel Corporation—doc.: IEEE 802.11-04/0707r0—Printout of Slides 1 through 17—Jul. 2003.
Topics in Wireless Security—Proactive Key Distribution Using Neighbor Graphs—Arunesh Mishra, Min Ho Shin, Nick L. Petroni, Jr., T. Charles Clancy, and William A. Arbaugh, University of Maryland—IEEE Wireless Communications—pp. 26 through 36—Feb. 204.

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