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

2. May 2012
doc.: IEEE /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

3. 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)

4. Frequency allocation plan
May 2012
Frequency allocation plan
White space communication
Hiroshi Harada (NICT)

5. May 2012
History(1/3)
2009/11: Investigation team concerning ideas for the Use of new radio waves launched.
2009/ /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)

6. Oneseg broadcasting service
May 2012
doc.: IEEE /0626r0
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)
1 seg or 3seg
Oneseg requirement
Bandwidth
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)
Freq.
ISDB-T one channel (6 MHz)
DQPSK
64 QAM
Hiroshi Harada (NICT)
Hiroshi Harada, NICT

7. 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/ /03
30,850
23,422
94.4
2011/ /02
26,131
20,244
94.8
Data from JEITA
Hiroshi Harada (NICT)

8. 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)

9. 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
* Meeting is not actual meeting. Looks like “council”.
Hiroshi Harada (NICT)

10. 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)

11. 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)

12. 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)

13. 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 , and the update information will be reported
Hiroshi Harada (NICT)

14. May 2012
Propose to af
Need to consider coexistence with oneseg broadcasting
If OFDM will be selected in m, the same level of spectrum mask will be requested to m
Each PHY proposal must follow the channel spacing in the home band (In the case of af …, 2.4 G, 5GHz)
Hiroshi Harada (NICT)