A radio communication system (100) provides a radio air interface at a master node (102) for subscriber units associated with the master node. Among the subscriber units are several slave nodes (104, 106). 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, such as licensed broadcasters. The master node accesses an authorization server (108) 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 (118, 121). 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.

Title
System and method for maintaining a backup radio operating parameter list in a secondary use communication system
Application Number
12/409472
Publication Number
20100238798
Application Date
March 23, 2009
Publication Date
September 23, 2010
Inventor
David P Gurney
Carpentersville
IL, US
Ramandeep Ahuja
Chicago
IL, US
Agent
Motorola
IL, US
Assignee
Motorola
IL, US
IPC
G06F 11/00
H04J 01/16
H04L 12/26
H04B 17/00
H04W 24/00
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