Status Report on Usage of TV White Space in Japan May 2012 doc.: IEEE 802.11-12/0626r0 May 2012 Status Report on Usage of TV White Space in Japan Date: 2012-05-15 Authors: Hiroshi Harada (NICT) Hiroshi Harada, NICT

May 2012 doc.: IEEE 802.11-12/0626r0 May 2012 Abstract This presentation contains history and current status toward introducing TV white space applications in Japan. Hiroshi Harada (NICT) Hiroshi Harada, NICT

Key committee MIC (Ministry of Internal Affairs and Communications) May 2012 Key committee MIC (Ministry of Internal Affairs and Communications) MIC: Investigation Team concerning Ideas for the Use of New Radio Waves MIC: Meeting for White Space Promotion MIC: Broadcasting system committee, Information and Communications Council, Hiroshi Harada (NICT)

May 2012 History(1/3) 2009/11: Investigation team concerning ideas for the Use of new radio waves launched. 2009/12-2010/01: Call for proposal for the usage of white space, more than 100 proposals are submitted. 2010/08: Investigation team report summarized, “Promote new frequency utilization such as white space and find possibilities for local revitalization, business opportunities, and engineering innovation.” 2010/07: Investigation team selected 10 proposals as preceding model All propose dedicated area broadcasting service based on one segment type ISDB-T broad casting (Area-oneseg service) Hiroshi Harada (NICT)

Oneseg broadcasting service May 2012 Oneseg broadcasting service ISDB-T Divided13 segment (13 OFDM segment) in a channel Can divide maximum three parts Use OFDM transmission scheme Standardized in ARIB STD-B31 and TR-B14 (operational rules) Oneseg broadcasting is mainly used for mobile broadcasting 1 segment x 13 Freq. ISDB-T one channel (6 MHz) Oneseg requirement Bandwidth 428.57 kHz Mode 1 Mode 2 Mode3 Subcarrier spacing (kHz) 5.968 1.984 0.992 Num of subcarrier 108 216 432 Symbol duration (us) 252 504 1008 Guard interval ¼,1/8,1/16,1/32 FEC(inncer code) Convolutional (1/2,2/3,3/4,5/6,7/8) Outer code RS(204,188) 1 seg or 3seg Freq. ISDB-T one channel (6 MHz) DQPSK 64 QAM Hiroshi Harada (NICT)

Background of expansion of oneseg service May 2012 Background of expansion of oneseg service More than 90 % mobile phone in Japan have a function to receive broadcasting system based on ISDB-T one segment broadcasting service Period Total shipment number of mobile phone (thousand) with one-segment (mobile broadcasting) receiver (thousand) Share (%) 2010/04-2011/03 30,850 23,422 94.4 2011/04-2012/02 26,131 20,244 94.8 Data from JEITA Hiroshi Harada (NICT)

History (2/3) 2010/09: Meeting for White Space Promotion launched May 2012 History (2/3) 2010/09: Meeting for White Space Promotion launched 2010/10: Broadcasting system committee, Information and Communications Council launched a working group for white space utilized broadcasting system Hiroshi Harada (NICT)

Meeting for White Space Promotion May 2012 Meeting for White Space Promotion Objectives Expand nation-wide white space utilization Mission Select and evaluate “special white space areas” Exchange ideas regarding priorities for “special white space areas” Challenge facing the practical use of white space Make rules for the expansion of businesses utilizing white space Make environmental improvements to prevent interference with existing systems Status September 2010: Meeting launched September 2011: Working group for coexistence in white space applications launched Hiroshi Harada (NICT)

May 2012 History (3/3) 2010/09-10: MIC called for the proposal on special white space areas and its usage. 44 proposals were submitted. 2011/04: 25 proposals (white space areas) were accepted 23 ubiquitous broadcasting (Area-oneseg) 1 broadband internet 1 sensor network 2011/09: Working group for coexistence in white space applications launched 2012/03: Coexistence WG issued first report issued 2012/03: White space utilized broadcasting system WG first report issued Hiroshi Harada (NICT)

Conditions to decide white space area May 2012 Conditions to decide white space area To conduct actual proof as much as possible concerning distribution of urgent information, etc. in times of emergencies such as earthquake disasters, etc. To regularly report progress and results from proofs-of-concept, including item (1), to the Meeting for White Space Promotion. To correspond by making changes as necessary to ensure that other radio stations are not disturbed by items relating to the use of proposed radio waves (frequencies, antenna power, etc.) or utilization areas. To make adjustments in advance between proponents where there is the possibility of implementation locations overlapping, covering items relating to radio wave use and times of use, etc Hiroshi Harada (NICT)

Working group for coexistence in white space applications May 2012 Working group for coexistence in white space applications Objectives and mission Study coexisting mechanism in white space applications from the viewpoint of technical, institutional, and operation aspects Report the conclusions to the meeting Meeting for White Space Promotion Status September 2011: Working group launched March 2012: First report issued Hiroshi Harada (NICT)

May 2012 Current status Coexisting mechanism: Coexistence WG continues to study the concrete schemes White space applications: Area oneseg services has been permitted to do actual services in TV white space with conditions summarized by White space utilized broadcasting system WG Not license-exempt Actual services can be started The author becomes a liaison between Coexistence WG and 802.11, and the latest information will be reported Hiroshi Harada (NICT)