Document No:
GSC-19_105
Source:
Association of Radio Industries and Businesses (ARIB)
Contact:
Toshihiro Matsuzaka & Keigo Hasegawa,
Hitachi Kokusai Electric (matsuzaka.toshihiro@h-kokusai.com; hasegawa.keigo@h-kokusai.com)
Agenda Item:
3.5
VHF Private Broadband Wireless System
for Public Safety in Japan
Association of Radio Industries and Businesses (ARIB)
GSC-19 Meeting, 15-16 July 2015, Geneva
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Japan has lots of disaster
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Attacked by Earthquake and Tsunami
11th March, 2011
GSC-19 Meeting, 15-16 July 2015, Geneva This
slide from GSC-18, 22-23 July 2014, Sophia Antipolis
3
Lots of investment and effort in the past
Data Gathering
Analysis / Decision
Information to Citizen
Japan Meteorological
Agency
Broadcaster
seismometer
(Earthquake Phenomena
Observation System)
Local Government
4200 sites around Japan
GSC-19 Meeting, 15-16 July 2015, Geneva This
Telecomm Operator
Fire Department
slide from GSC-18, 22-23 July 2014, Sophia Antipolis
Local Government
4
Traditional Radio tools for Public Safety
Police Radio
Fire and
Ambulance Radio
Investigation
information
Directives
6.25kHz, 9.6kbps
Accidents information
Emergency Radio
Disaster information
Location
information
Traffic Control
radio
Traffic information
Administrative
information
25kHz, 32kbps
Water level
information
But all these are narrow band based,
voice (and limited data) only
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We need broadband for Public Safety!
• Smart Phones, LTE/3G are enough, correct?
No
• Disaster may not always happen in the LTE/3G area
We need
“Murphy's
law”broadband for Public Safety!
• We experienced that LTE/3G base station had damage also
on 11th March, 2011
• We need broadband as private line for government,
municipal offices
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Answer from us
 “VHF Private Broadband Wireless System”
 (up to 7Mbps in uplink)
 Non Line-of-Sight (NLoS) Transmission
 P-MP(1：3）operation
 Mobility support (vehicle usage)
 Light weight（<8kg） /small size（<11L）
System
ARIB STD T-103
（will be included inIEEE802.22b）
Multiple Access/Duplex
OFDMA/TDD
Frequency band
VHF 170-202.5 [MHz]
Channel bandwidth
5 [MHz]
Modulation
QPSK, 16-QAM, 64-QAM
Error correcting code
Convolutional Turbo code
Transmission power
1W/5W
FFT Size
1024 [point]
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Covering the Part of
VHF Band III
【VHF Band III】
174-230 MHz in EU, Asia
174-216 MHz in the USA
used mainly for analog television and
digital broadcasting
This product is designed and manufactured with the technology transfer from NICT
(National Institute of Information and Communications Technology)
7
Answer from us
• Battery operation is
possible
GSC-19 Meeting, 15-16 July 2015, Geneva
• Temporary antenna is
enough
8
Operation introduction
Actual Disaster (Land Slide) Area
Hikitsuchi
Sarutani
Connect To
Optic.NW
2.1km
4.5km
B
Akadani
A
C
(Disaster Area)
[m]
Severe Non Line of Sight Environment
Point C needs to be
monitored by camera,
but no mean till 2013
Sarutani
A
GSC-19 Meeting, 15-16 July 2015, Geneva
Hikitsuchi
B
Akadani
C
9
Heading to
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Point C
10
Point C
We set IP camera here
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Point B (relay point)
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Point C can be monitored at Point A
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Result
Sarutani
UL
A
Data Direction
DL
A to C
Radio Link1
C to A
Hikitsuchi
B
DL
UL
Radio Link2
C
Akadani
Modulation
(r = 1/2)
Transmitted
Data rate
[kbps]
Received
Data rate
[kbps]
PLR
[%]
QPSK
16QAM
QPSK
16QAM
300
600
300
600
300
522
300
600
0
13.3
0
0
Measured by Iperf (60sec, UDP packet）
 Broadband available at the most
severe location/condition
 600kbps at 16QAM, relay mode
(One channel is divided by 3
segments in case of relay mode)
Geospatial Information Authority of Japan
 Easy to Setup. Temporary mast is
enough
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C
Akadani Station
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Video
• Extreme condition
• Typical use
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Summary
• ARIB and manufacturers succeeded in
launching new device/system for Public Safety
 VHF (NLoS based)
 Broadband
• This will save more lives
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Thank you
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Back up slides
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Back ground - Regulation
Digital migration (TV) in Japan
Terrestrial Analogue TV Broadcast (Total of 370 MHz)
90
108
170
90
108
170
222
470
770 [MHz]
Previously
After
Full Digitalization
on July 25th, 2011
Other Use
205
222
Other Use
470
710
730
Terrestrial Digital TV Broadcast
(Total of 240MHz)
770 [MHz]
ITS
VHF Private Broadband Wireless
System
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Cellular
Phones
5MHz Bandwidth in VHF
Upper side (202.5MHz or upper)
- Multi-media broadcasting with enough guard band
5MHz
Other
Radio
system
170MHz
Guard
band
202.5MHz
Multi-media
broadcast
Frequency
Lower side (170MHz or lower)
-Communication line for broadcasting service
- Ocean vessel communication
- Amateur radio
- Aviation/navigation system etc
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Indonesia drive test: 16km distance (LoS)
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Indonesia drive test: 17km distance (NLoS)
VHF is great frequency
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