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Perspectives on Cognitive Radio Networks: Challenges and Progress

Explore the skepticism, incremental progress, and assurance challenges surrounding cognitive radio networks. From Mitola's early work to TVWS policy development, this overview highlights key milestones and hurdles in the field.

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Perspectives on Cognitive Radio Networks: Challenges and Progress

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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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