The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 2001
Filed:
Nov. 04, 1998
Steven E. Hebeler, Austin, TX (US);
Ken Alton, Austin, TX (US);
Legerity, Inc., Austin, TX (US);
Abstract
A handset and a base station both periodically scan all channels to determine which channels are clear. The handset clear channel information is transferred to the base station and the base station clear channel information is transferred to the handset. Those channels determined to be clear channels by both the base station and handset are determined by logically combining the clear channel information from the handset and base station and generating an array of available channels. A subset of the available channels is determined and used by both the handset and the base station to initiate communications. A starting channel in the subset is randomly chosen based on a security ID exchanged between the handset and the base station. The remaining channels are selected according to how many channels are predetermined to be scanned. The base station and handset then use only those channels in the subset to communicate. That reduces the power used by the handset since it only scans a subset of the available channels and speeds initial link up time between the base station and the handset.