An estimation of TVWS availability in Japan

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1 An estimation of TVWS availability in Japan Date: Authors: Name Company Address Phone Tsuyoshi Shimomura Golnaz Farhadi Fujitsu Laboratories Ltd Fujitsu Laboratories of America, Inc Sakado, Takatsu-ku, Kawsaki, Kanagawa, , Japan 1240 E. Arques Ave. M/S 345 Sunnuvale, CA com m Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Slide 1

2 Abstract This contribution introduces the results of an estimation of TVWS availability in Japan. Slide 2

3 Outline Back ground Calculation assumption TVWS maps of Japan Estimation results Conclusion Slide 3

4 Back ground Analog TV broadcasting has been terminated on March TVWS regulation is still under discussion in Japan. Some applications such like wireless microphone, OneSeg small zone broadcasting, smart meter network, wireless broadband network, are going to be allowed to operate in TVWS. Slide 4

5 Calculation assumption Items Values Remarks Number of physical TV channels MHz-710MHz Propagation model ITU-R P.1546 Including terrain clearance angle correction. Propagation curve F(50,90) F(X,Y): a two dimensional CCDF, X: spatial percentage, Y: temporal percentage. Protected contour 41dBuV/m Same with FCC regulations. Separation distance (co-channel / adj-channel) 6.0km / 0.1km Geographical information SRTM2 NASA product. Latitude and longitude resolution 0.01 Same with FCC regulations with antenna heights of less than 3 meters About 900 meters by 1000 meters (Total grids) Slide 5

TVWS maps Number of TVWS Channels 0 10 20 30 40 Transmitter/booster/translator site (Total more than 2000

6 TVWS maps Number of TVWS Channels Transmitter/booster/translator site (Total more than 2000 sites, each of which transmits 2-9 TV channels) (a) For a 4 Watt TVWS device (b) For a 0.04 Watt TVWS device Slide 6

7 CCDF Estimation Results 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 100MHz 0.04W 4W By population By area Tokyo Yokohama Osaka Nagoya Sapporo Koube Kyoto Fukuoka Kawasaki Saitama Hiroshima Sendai 100MHz 4W 0.04W Number of WS channels Number of WS channels Over 70% of locations in Japan may expect more than 100MHz TVWS. Many heavily populated areas may expect more than 60MHz TVWS. Slide 7

8 Conclusions Assuming the application of FCC rules, over 70% of locations in Japan may expect more than 100MHz TVWS. Many heavily populated areas may expect more than 60MHz TVWS. In Japan, TVWS seems to be able to accommodate several type of systems. Coexistence will be an important issue to be resolved. Slide 8

9 References FCC, Second Memorandum Opinion and Order, FCC , September 23,2010 International Telecommunications Union, Recommendation ITU-R P Method for pointto-area prediction for terrestrial services in the frequency range 30MHz to 3000MHz, 2007 Slide 9

Identifying and Quantifying Spectrum Opportunities for 5G 3 May Dr. Melvin Ferreira

Identifying and Quantifying Spectrum Opportunities for 5G 3 May 2017 Dr. Melvin Ferreira melvin.ferreira@nwu.ac.za Outline Our view Work on TVWS spectrum availability Utility of TVWS for Broadband Wireless