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:
Dec. 02, 2014
Filed:
Sep. 06, 2012
Ramandeep Ahuja, Chicago, IL (US);
David P. Gurney, Carpentersville, IL (US);
Ramandeep Ahuja, Chicago, IL (US);
David P. Gurney, Carpentersville, IL (US);
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
A radio communication system () provides a radio air interface at a master node () for subscriber units associated with the master node. Among the subscriber units are several slave nodes (). The communication system has the ability to operate as a secondary user in unused spectrum portions of a frequency band otherwise reserved for primary operators. The master node accesses an authorization server () to obtain a list of unused channels in the region of the master node. Each slave node also contacts the authorization server to obtain a list of unused channels in the region where each respective slave node is located, via another network (). The unused channels common to the slave nodes and the master node are used to create a backup radio operating parameter list which is used by the master node if a fault occurs between the master node the authorization server.