Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-05-01
2007-05-01
Kincaid, Lester G. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S067110, C455S411000, C340S568100, C340S573400
Reexamination Certificate
active
10334263
ABSTRACT:
Security of wireless networks is improved by rejecting traffic from a wireless device located outside a defined spatial boundary. The device's spatial position with respect to the boundary is determined using directional antenna arrays on a plurality of measurement points, and calculating where the vectors intersect. Having thus determined a device's location, access to a wireless network can be denied if the device is outside a predetermined spatial boundary. Or, the device's location inside or outside of the spatial boundary can be used for monitoring a changeable location of one or more client devices in a wireless network, for example as a theft detection or theft deterrent mechanism.
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Hind John R.
Stockton Marcia L.
Doubet Marcia
Herndon Jerry W.
International Business Machines - Corporation
Kincaid Lester G.
Sams Matthew C
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