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700 MHz Band
Digital Dividend
5JAN15
dykim@cnu.kr
1
Communications Media
• Fiber
• Wi-Fi
• Digital Dividend
2
Fiber
• FTTC > FTTH
• Fiber to every wall socket
3
Wi-Fi
• 2.4, 5, 60 GHz
• 11, 54, 150, 866.7, 6750 Mbps
• 20(indoors) ~ 100(outdoors) meters
• Public Wi-Fi!
4
TV frequencies
• Analog: 54-806 MHz
• Digital: 54-698 MHz
• http://en.wikipedia.org/wiki/Television_channel_frequencies
• http://en.wikipedia.org/wiki/North_American_television_frequencies
5
TV White Space
(TVWS or WS)
• 54-698 MHz 대역 중 유휴 대역
• 사용 않는 대역 + 대역 사이 틈(guard band)
• DTV 전환 전: 54-806 MHz 대역 중 유휴 대역
6
Digital Dividend
(DDV)
• DTV 전환으로 내어 놓은 700 MHz 대역
• 698-806 MHz
7
WS/DDV 활용 기술
• White-Fi: 1 Km
• Super Wi-Fi: 100 Km
• WS, DDV에 모두 적용 가능
• 하지만 현재는 WS에의 적용만 정의
• CR(cognitive radio) + GDB(geolocation DB)
8
White-FI
• IEEE 802.11af
• 26.7 or 35.6 Mbps/ch (6/7 or 8 MHz) @1 km
• up to 426.7 Mbps or 568.9 Mbps
• 4 (bonded channels) x 4 (spacial streams)
9
Super Wi-Fi
• IEEE 802.22
• ~ 100 km
• ~19 Mbps/ch (6 MHz) @30 km
• channel bonding, (spatial streams)
10
한국에서의 TVWS
• Super Wi-Fi 등 미래부 시범 사업
• KT 등 이통사도 참여
• TVWS 활용은 당연한 일
• 문제는....
11
Digital Dividend
• 누가 주인?
• 이동통신 사업자? 지상파 방송사?
• 엇박자
• FCC(US): pulbic, free
• EU(ITU-R)/Asia(APT): 이동통신
• Common Wealth!
12
이통업자?
• 이미 충분한 기득권 확보
• 5G 등은 기존 대역 안에서 진화를 모색해야 마땅
• 특정 사업영역/사업자에 더 이상의 특혜를 줄 이유가 없다.
13
UHD 방송?
• 유선(Cable, IPTV) TV 시청이 대세
• 지상파 시청은 현재 5~18%; 계속 하락 추세
• 지상파 선도 방송이 TV 산업 경쟁력의 전제 조건은 아님
• 유선 선도 방송으로도 가능
• 한국은 HDTV 방송은 늦었지만 TV set는 세계를 장악
14
인터넷 = 보편적 복지!
• 물, 전기....
• Digital Dividend == 무상 복지!
15
재난 통신
• 별도의 대역을 할여할 기술적 이유가 없음
• 패킷 프레임 관리 기술로 보안/품질 요구 조건 충족 가능
16
Google's
Open Platform Model
• Any applications
• Any devices
• Any (3rd party) services
• Any (3rd party) networks
• http://en.wikipedia.org/wiki/United_States_2008_wireless_spectrum_auction
17
Digital Dividend as
Free Social Welfare
• Free for customers
• phone, phone calls, Internet
• Open playground for new small/mediaum startups
• Business model for providers
• advertisement (minimal)
• tax reduction/exemption
18
Digital Dividend
back to People!
19
References
• J. J. Lee, K. C. Park, B. G. Lee, "Issues on the Digital Dividend in Korea,"
Recent Advances in Electrical and Electronic Engineering, (ISBN:
978-960-474-399-5), pp. 155-161, 2014.
• A. B. Flores, R. E. Guerra, and E. W. Knightly, "IEEE 802.11af: A
Standard for TV White Space Spectrum Sharing," IEEE Commun. Mag.,
pp. 92-100, Oct. 2013.
20

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Digital Dividend

  • 1. 700 MHz Band Digital Dividend 5JAN15 dykim@cnu.kr 1
  • 2. Communications Media • Fiber • Wi-Fi • Digital Dividend 2
  • 3. Fiber • FTTC > FTTH • Fiber to every wall socket 3
  • 4. Wi-Fi • 2.4, 5, 60 GHz • 11, 54, 150, 866.7, 6750 Mbps • 20(indoors) ~ 100(outdoors) meters • Public Wi-Fi! 4
  • 5. TV frequencies • Analog: 54-806 MHz • Digital: 54-698 MHz • http://en.wikipedia.org/wiki/Television_channel_frequencies • http://en.wikipedia.org/wiki/North_American_television_frequencies 5
  • 6. TV White Space (TVWS or WS) • 54-698 MHz 대역 중 유휴 대역 • 사용 않는 대역 + 대역 사이 틈(guard band) • DTV 전환 전: 54-806 MHz 대역 중 유휴 대역 6
  • 7. Digital Dividend (DDV) • DTV 전환으로 내어 놓은 700 MHz 대역 • 698-806 MHz 7
  • 8. WS/DDV 활용 기술 • White-Fi: 1 Km • Super Wi-Fi: 100 Km • WS, DDV에 모두 적용 가능 • 하지만 현재는 WS에의 적용만 정의 • CR(cognitive radio) + GDB(geolocation DB) 8
  • 9. White-FI • IEEE 802.11af • 26.7 or 35.6 Mbps/ch (6/7 or 8 MHz) @1 km • up to 426.7 Mbps or 568.9 Mbps • 4 (bonded channels) x 4 (spacial streams) 9
  • 10. Super Wi-Fi • IEEE 802.22 • ~ 100 km • ~19 Mbps/ch (6 MHz) @30 km • channel bonding, (spatial streams) 10
  • 11. 한국에서의 TVWS • Super Wi-Fi 등 미래부 시범 사업 • KT 등 이통사도 참여 • TVWS 활용은 당연한 일 • 문제는.... 11
  • 12. Digital Dividend • 누가 주인? • 이동통신 사업자? 지상파 방송사? • 엇박자 • FCC(US): pulbic, free • EU(ITU-R)/Asia(APT): 이동통신 • Common Wealth! 12
  • 13. 이통업자? • 이미 충분한 기득권 확보 • 5G 등은 기존 대역 안에서 진화를 모색해야 마땅 • 특정 사업영역/사업자에 더 이상의 특혜를 줄 이유가 없다. 13
  • 14. UHD 방송? • 유선(Cable, IPTV) TV 시청이 대세 • 지상파 시청은 현재 5~18%; 계속 하락 추세 • 지상파 선도 방송이 TV 산업 경쟁력의 전제 조건은 아님 • 유선 선도 방송으로도 가능 • 한국은 HDTV 방송은 늦었지만 TV set는 세계를 장악 14
  • 15. 인터넷 = 보편적 복지! • 물, 전기.... • Digital Dividend == 무상 복지! 15
  • 16. 재난 통신 • 별도의 대역을 할여할 기술적 이유가 없음 • 패킷 프레임 관리 기술로 보안/품질 요구 조건 충족 가능 16
  • 17. Google's Open Platform Model • Any applications • Any devices • Any (3rd party) services • Any (3rd party) networks • http://en.wikipedia.org/wiki/United_States_2008_wireless_spectrum_auction 17
  • 18. Digital Dividend as Free Social Welfare • Free for customers • phone, phone calls, Internet • Open playground for new small/mediaum startups • Business model for providers • advertisement (minimal) • tax reduction/exemption 18
  • 20. References • J. J. Lee, K. C. Park, B. G. Lee, "Issues on the Digital Dividend in Korea," Recent Advances in Electrical and Electronic Engineering, (ISBN: 978-960-474-399-5), pp. 155-161, 2014. • A. B. Flores, R. E. Guerra, and E. W. Knightly, "IEEE 802.11af: A Standard for TV White Space Spectrum Sharing," IEEE Commun. Mag., pp. 92-100, Oct. 2013. 20