| US 7,466,678 B2 | ||
| System and method for passive scanning of authorized wireless channels | ||
| Daryl Carvis Cromer, Apex, N.C. (US); Philip John Jakes, Durham, N.C. (US); Howard Jeffrey Locker, Cary, N.C. (US); and Ronald John Griffiths, Jr., Raleigh, N.C. (US) | ||
| Assigned to Lenovo (Singapore) Pte. Ltd., Singapore (Singapore) | ||
| Filed on Dec. 29, 2003, as Appl. No. 10/747,575. | ||
| Prior Publication US 2005/0147070 A1, Jul. 07, 2005 | ||
| Int. Cl. H04Q 7/24 (2006.01); H04J 1/00 (2006.01) | ||
| U.S. Cl. 370—331 [370/343; 455/422.1; 455/450] | 8 Claims |
| 1. In a wireless device, a method comprising the steps of:
passively scanning for a wireless signal transmitted from an access point, wherein the scanning is performed using a default
set of frequencies;
determining if a selected access point is providing a geographical indicator to the wireless device, wherein the geographical
indicator informs the wireless device where the access point is geographically located;
utilizing the geographical indicator to determine if the wireless device is authorized to communicate with wireless signal
frequencies in addition to the default set of frequencies;
re-scanning for a wireless signal transmitted from an access point, wherein the re-scanning is performed using the wireless
signal frequencies in addition to the default set of frequencies;
in response to the re-scanning step, selecting an access point to communicate through to the network backbone; and
the wireless device communicating with the selected access point utilizing any of the default set of frequencies and the wireless
signal frequencies in addition to the default set of frequencies;
wherein the wireless device determines if it is authorized to communicate with the selected access point with wireless signal
frequencies in addition to the default set of frequencies by determining if has loaded a certificate indicating such authority.
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