Tim brown cmu - 1403ictp spectrumefficiency

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  • In Africa, there are similar allocations in many but they are all guided by ITU region 1 allocations. Africa is 1/5 as dense and 1/22 the GDP/person compared to Europe.Countries like Rwanda have only 1 TV channel. The rest of TV spectrum is mostly unused (wasated). Specialized equipment that deviates from world standards is more costly and more importantly because current allocations are hard coded in hard-to-change rules, deviations will lock out future innovations.
  • Radio can have many policies to choose from
  • Tim brown cmu - 1403ictp spectrumefficiency

    1. 1. Defining Spectrum Efficiency Tim Brown, Professor Innovation Africa Digital Summit Banjul, The Gambia March 27, 2014 World-Renown Faculty | Collaborative Learning | Innovation Solutions | Students Employers Hire www.cmu.edu/rwanda
    2. 2. 2 Master’s Programs • M.S. in Information Technology • M.S. in Electrical & Computer Engineering Accepting applications for August 2014 innovation, global perspective, on campus, hands-on skills CMU Graduate Programs in Rwanda
    3. 3. Spectrum Low HighRadio Frequencies
    4. 4. Demand on Spectrum is Growing Five year projected growth in mobile data traffic • FCC: “The broadband spectrum deficit is likely to approach 300 MHz by 2014” • Cisco VNI: A smartphone generates 29X traffic of a feature phone. World Middle East and Africa Ericsson (to 2019) 10X 11X Cisco VNI (to 2018) 11X 14X
    5. 5. What is Spectrum Efficiency?
    6. 6. Spectrum Efficiency - Technical http://commons.wikimedia.org/wiki/File:Radio-tower-autobahn-tree.jpg http://en.wikipedia.org/wiki/File:Two_Cell_Phones_2.png Fundamental Limits For more users need to be • Louder
    7. 7. Spectrum Efficiency - Technical • MIMO: More channels
    8. 8. Spectrum Efficiency - Technical Technical  25 times growth in capacity Past 50 years
    9. 9. Spectrum Efficiency - Business
    10. 10. 300x growth in 27 years $365B total investment
    11. 11. Spectrum Efficiency – Business Changing the model • BT Wi-Fi > 5 million hotspots in UK  500,000 in London  17 sq. km WMAN central London  Part of FON Consortium’s > 8 million hotspots • Free Mobile (France) > 4 million hotspots  Built on wireline subs of parent, Iliad • China Mobile > 2 million  Projecting 70% offload rates • U.S. Cable Consortium (5 companies)  200,000 hotspots (mostly outdoors/urban)  Comcast: Adopting FON model ~ potential 20 million hotspots
    12. 12. Spectrum Efficiency - Business Business 2000 times growth in capacity Past 30 years
    13. 13. Spectrum Efficiency - Regulatory Unused “white spaces” All spectrum is allocated
    14. 14. Spectrum Efficiency – Regulatory Most Spectrum is Unused
    15. 15. Spectrum Efficiency - Regulatory • Most spectrum is unused – even in cities
    16. 16. 17 • ITU Region 1 is diverse – Conform  waste spectrum – Differ  miss future innovation Cognitive (aka white space) radios. ITU Region 1 Spectrum Efficiency - Regulatory
    17. 17. Spectrum Efficiency – Regulatory White-Space Radios • Idea: Logical overlay on existing radios – radios get permission (a policy) to communicate – Regulator through policies controls who, what, where, and when – Polices timeout and need renewed. • Frees up spectrum – local and flexible FAA 10MHz CONUS NTIA
    18. 18. Spectrum Efficiency - Regulatory Regulatory 25times growth in capacity Past 40 years
    19. 19. Conclusion • Exploding use of spectrum • Requires combined efforts in – Technolgy – Business – Regulation

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