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Perspectives on Cognitive Radio Networks

Perspectives on Cognitive Radio Networks. Frederick Martin. Perspective #1 -- Skepticism. -- Mitola (1999) to US TVWS opening (2009) = 10 years -- US is ~5% of world population -- TVWS is roughly 252/6000 usable MHz = ~4% => Acceptance rate = 0.2% Extrapolate:

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Perspectives on Cognitive Radio Networks

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  1. Perspectives on Cognitive Radio Networks Frederick Martin

  2. Perspective #1 -- Skepticism • -- Mitola (1999) to US TVWS opening (2009) = 10 years • -- US is ~5% of world population • -- TVWS is roughly 252/6000 usable MHz = ~4% • => Acceptance rate = 0.2% • Extrapolate: • Total acceptance in 500 years!

  3. 2015? TVWS Policy- based systems 2009 Dynamic Frequency Selection Increasing Cognition Virtual Carrier Sense 1999 Trunking CSMA 1990 AVC (AGC) 1983 1975 1927 1930 || 1970 1980 1990 2000 2010 2020 Perspective #2 -- Incrementalism • We will not achieve cognitive radio, We will achieve a MORE cognitive radio. • -- Ed Callaway, Ph.D

  4. Perspective #3 -- Assurance • Current research effort – how to make cognitive radios and cognitive networks work. • Needed research effort – how to insure that cognitive radios and cognitive networks do only what they are allowed to do. DIFFICULT TEST AND ASSURANCE PROBLEM. • Until this problem is solved, regulators will not accept cognitive radios and cognitive networks in a meaningful way.

  5. Summary of Perspectives • Skepticism: regulatory and standards progress will be slow. • Incremental progress: No revolution here. • Biggest obstacle: Test and Assurance. Good research topic.

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