Status Report on TV White Space in Japan (Liaison Report to JP MIC)

1. Status Report on TV White Space in Japan (Liaison Report to JP MIC) Date: 2013-11-13 Authors: Hiroshi Harada (NICT)

2. Abstract This presentation contains current status toward introducing TV white space applications in Japan. History of report Hiroshi Harada (NICT)

3. Summary of the last report • Since Nov. 2009, white space operation has been discussed in Ministry of Internal Affairs and Communications (MIC) in order to secure bandwidth • Five main applications are under discussion in the Meeting (Council) for White Space Promotion in MIC • Wireless microphone (Will start in FY 2013, highest level of priority in the secondary systems) • Area broadcasting (Area-one-segment broadcasting service, Area oneseg) • White space operation has already started • Wireless access systems for emergency situation (disaster) • Sensor network • Wireless broadband • Area broadcasting services have been permitted to do actual services in TV white space with conditions summarized by White space utilized broadcasting system WG, Broadcasting system committee, Information and Communications Council in MIC • Not license-exempt • Actual services can be started (Japan is second country that allows commercial frequency sharing service of TV white space) • Coexisting mechanism: Coexistence WG is launched under council for white space promotion and is studying the concrete schemes Hiroshi Harada (NICT)

4. History of WS regulation establishment Hiroshi Harada (NICT)

5. Area one-seg broadcasting service 1 segment x 13 • Based on ISDB-T • Divided13 segment (13 OFDM segment) in a channel • Use OFDM transmission scheme • Standardized in ARIB STD-B55 (Jul., 2012) • Area broadcasting is mainly used for mobile broadcasting in amusement facilities and air port , digital signage, and so on Freq. ISDB-T one channel (6 MHz) P >= 10/13 mW P = 1/13 mW P <= 0.1/13 mW Attenuation from average power P (dB/10 kHz) Frequency (MHz) Spectrum mask (source: ARIB STD-B55) Hiroshi Harada (NICT)

6. Area full-seg broadcasting service 1 segment x 13 • Based on ISDB-T • Used 13 OFDM one-segment in a channel • Standardized in ARIB STD-B55 (Jul., 2012) • Area broadcasting is mainly used for mobile broadcasting in amusement facilities and air port , digital signage, and so on Freq. ISDB-T one channel (6 MHz) P >= 10 mW P = 10 mW P <= 10 mW Attenuation from average power P (dB/10 kHz) Frequency (MHz) Spectrum mask (source: ARIB STD-B55) Hiroshi Harada (NICT)

7. Coexistence between White Space Systems (b) WSDB for co-existing between secondary users that uses different wireless access (eg. 802.19) (a) WSDB for co-existing between primary and secondary users (c) WSDB for co-existing between secondary users that uses common wireless access (eg. 802.11af) Primary users (Licensed users) 干渉量 の計算 Calculation of interference Calculation of interference Calculation of interference Secondary users B2 (Using wireless access B) Secondary user A1 (Using wireless access A) Secondary users B1 (Using wireless access B) Servers are launched with centerized or distribution manner Hiroshi Harada (NICT)

8. Discussion topics • Coexistence mechanism between white space systems is being discussed in the committee for white space promotion, MIC • Points to be discussed • Who provide available channel map on white space: MIC (but for wireless microphone operator) • Who permit to use white space: MIC • Will use WSDB ?: No, MIC will check the availability for regulation and provide license • Who will manage coexistence between WS systems: Continue to discuss • Provided a report on summary of discussion and future plan and opened it on September, and public comment was done. • The report mainly summarized how to coexist between WS systems. • Mainly for coexistence between wireless microphone and ubiquitous broadcasting • Coexistence including WS communication systems will be discussed after deciding coexistence mechanism between wireless microphone and ubiquitous broadcasting. R&D is encouraged for the topics Hiroshi Harada (NICT)

9. Coexistence mechanism proposed in the report Primary operators (TV) Request to reduce interference Request to reduce interference Information sharing Wireless microphone promotion alliance or forum Area broadcasting promotion alliance or forum M5. Request to do coexistence with primary and secondary operators U5. Request to do coexistence with primary and secondary operators M4. Report operational bands U4. Report operational bands U1.Negotiation to find operational band Wireless microphone operators Area broadcasting service operators M2.Submit license application form M3.Provide license U3.Provide license U2.Submit license application form M1.Provide WS channel lists MIC • Provide channel list • Update channel list • Evaluate application of license • Provide license Hiroshi Harada (NICT)

10. Next step • Five main applications are under discussion in the Meeting (Council) for White Space Promotion in MIC • Wireless microphone (Will start in FY 2013, highest level of priority in the secondary systems) • Area broadcasting (Area-one-segment broadcasting service, Area oneseg) • White space operation has already started • Wireless access systems for emergency situation (disaster) • Sensor network • Wireless broadband • Regulation for sensor network system will be discussed after finishing MIC project to check feasibility the system • IEEE802.15.4m based system is a big candidate and its feasibility has checked through MIC project • Regulation for Wireless access systems for emergency situation (disaster) will be discussed after finishing MIC project to check feasibility the system • 802.11x based system is a big candidate and its feasiblity has checked through MIC project Hiroshi Harada (NICT)

11. Development of product Hiroshi Harada (NICT)

12. World-first developed products IEEE 802.11af/a based TVWS/2.4G access point (NICT) and IEEE 802.11 based TVWS/2.4 G tablet terminal (NICT) IEEE 802.15.4m NB-OFDM radio for sensor networks (NICT) IEEE 802.22 radio for regional area network (NICT,Demonstrated Super WiFi Summit and NAB show) Hiroshi Harada (NICT)

13. 802.11af demonstration Hiroshi Harada (NICT)

14. Demonstration of 802.11af at WiFi alliance meetingOverview Hiroshi Harada (NICT)

15. Demonstration of 802.11af at WiFi alliance meetingConstruction of the prototype • TVWS Database, RLSS, AP and Stations are implemented • TVWS Database • Protection rules of primary users (FCC, Ofcom, Japanese rules) • Primary user only digital TV • IETF PAWS based on HTTP implemented for database query • RLSS • 802.11af draft D2.0 implemented • RLQP implemented for communicating RLSS • AP and STAs • MAC: 802.11af D2.0 implemented • PHY: • 802.11a re-band to Japanese digital TV bands • 802.11af based PHY Router Internet 1 SegTV transmitter Hiroshi Harada (NICT)

16. Demonstration of 802.11af at WiFi alliance meetingWhite Space Database This snapshot shows the channel availability of Tokyo Hilton according to the FCC rules The database is located at Yokosuka Research Park (YRP) Hiroshi Harada (NICT)

17. Demonstration of 802.11af at WiFi alliance meeting11af AP and STA Demo system Hiroshi Harada (NICT)

18. Demonstration of 802.11af at WiFi alliance meetingRegistered location secure server (RLSS) Hiroshi Harada (NICT)