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Summary: 1
Reliable Open Spectrum Communications Through
Proactive Spectrum Access
Prashanth Aravinda Kumar Acharya, Sumit Singh, Haitao Zheng
Department of Computer Science, University of California, Santa Barbara, CA 93106 U.S.A
Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106 U.S.A
Email: acharya@cs.ucsb.edu, sumit@ece.ucsb.edu, htzheng@cs.ucsb.edu
Abstract-- Open Spectrum systems offer an attractive solution
to the reuse of under-utilized licensed spectrum. Existing pro-
posals take a reactive sense-and-avoid approach to impulsively
reconfigure spectrum usage without any knowledge of future
dynamics. We propose a proactive spectrum access approach
where secondary users utilize past observations to build pre-
dictive models on spectrum availability, and intelligently plan
channel usage to maximize utilization and minimize disruptions
to primary users. Based on the characteristics of TV-broadcast,
we develop a simple availability metric and apply a usability
filter to eliminate unreliable channels with heavy and frequent
appearance of primary users. Our experimental results show
that the proactive approach can significantly reduce the number
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