Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Defining Spectrum Efficiency
Tim Brown, Professor
Innovation Africa Digital Summit
Banjul, The Gambia
March 27, 2014
World...
2
Master’s Programs
• M.S. in Information Technology
• M.S. in Electrical & Computer Engineering
Accepting applications fo...
Spectrum
Low HighRadio Frequencies
Demand on Spectrum is Growing
Five year projected growth in mobile data traffic
• FCC: “The broadband spectrum deficit is ...
What is Spectrum Efficiency?
Spectrum Efficiency - Technical
http://commons.wikimedia.org/wiki/File:Radio-tower-autobahn-tree.jpg http://en.wikipedia.o...
Spectrum Efficiency - Technical
• MIMO: More channels
Spectrum Efficiency - Technical
Technical  25 times growth in capacity
Past 50 years
Spectrum Efficiency - Business
300x growth in 27 years
$365B total investment
Spectrum Efficiency – Business
Changing the model
• BT Wi-Fi > 5 million hotspots in UK
 500,000 in London
 17 sq. km WM...
Spectrum Efficiency - Business
Business 2000 times growth in capacity
Past 30 years
Spectrum Efficiency - Regulatory
Unused “white spaces”
All spectrum is
allocated
Spectrum Efficiency – Regulatory
Most Spectrum is Unused
Spectrum Efficiency - Regulatory
• Most spectrum is unused – even in cities
17
• ITU Region 1 is diverse
– Conform  waste spectrum
– Differ  miss future innovation
Cognitive (aka white space) radi...
Spectrum Efficiency – Regulatory
White-Space Radios
• Idea: Logical overlay on existing radios
– radios get permission (a ...
Spectrum Efficiency - Regulatory
Regulatory 25times growth in capacity
Past 40 years
Conclusion
• Exploding use of spectrum
• Requires combined efforts in
– Technolgy
– Business
– Regulation
Upcoming SlideShare
Loading in …5
×

0

Share

Download to read offline

Tim brown cmu - 1403ictp spectrumefficiency

Download to read offline

Presentation at IAD Summit

Related Books

Free with a 30 day trial from Scribd

See all

Related Audiobooks

Free with a 30 day trial from Scribd

See all
  • Be the first to like this

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

Presentation at IAD Summit

Views

Total views

668

On Slideshare

0

From embeds

0

Number of embeds

9

Actions

Downloads

11

Shares

0

Comments

0

Likes

0

×