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ESCAP workshop
Digital Broadcasting
for alarm & rescue
- - case study in China
Guoyu Wang
CQUPT, China
wanggyb@cqupt.edu.cn
Why Broadcasting
Only possible solution to deliver alarm
messages to all terminals simutaneously
Only network to survive in serious
disasters
Much cheaper to cover big area
Much easier to manage
New operation mode
Along with personal/family terminals, plenty
public terminals are provided.
Instead of voice and video, picture/text are
main contents.
Terminals triggered/controlled by transmitter.
without user turning off or selecting.
All these ensures authority, specialty,
compulsion and wide coverage
DAB for alarm
In emergency, all terminals will be woken up
within one minute
to deliver sound + text + picture + flush
Distinguished by
plenty public terminals, - - everywhere
shock effect, - - no one ignore
to ensure as much people as possible to get alarm messages at the first time.
Alarm with
LED & LCD ,
together with
loudspeakers
and other
terminals
DAB for alarm
DAB for rescue management
After serious disaster, traffic, internet and
communication are all down, broadcasting
may be only survive technique
DAB could be used to deliver instructions to
manage evacuation via public terminals
could coordinate medical, fire brigade and
rescue staff via personal terminals
could send files in word format to all PCs to
maintain government management channels
DAB for rescue management
need to develop low power transmitters
and receivers, as well as solar cell powered
LCDs and LEDs.
All above methods will greatly assist the
rescue management
DAB for emergency communication
In extreme situations, an isolated place could
establish communication with outside, if it
has a local DAB transmitter, in operation
Two unidirectional transmitters can be used
to achieve bi-directionality
communication can be established when both
sides have functioning receivers and
transmitters
DAB for emergency communication
transmitter and receiver can be integrated
and a connecting and dialog software is
developed (imitating the internet), a Skype-
like function can be implemented using DAB
Note this is done solely using broadcasting
instead of the internet
the boundary between broadcasting and the
communication is crossed here
DAB for emergency communication
Cost effective & Green
much cheaper than any communication
networks
more powerful & cost effective than FM
lower power consumption,
therefore Green Technology
Case study 1
DAB on campus
Chongqing University of Posts and Telecommunications
Campus area: 730 acres
Building area: 700,000 square meters
Population: 30,000 students/staffs
One DAB transmitter of 5W
Audio/Video
Encoder
MPEG
TS
Station-1
Audio
EncoderMP2
Station-2 .
.
.
Audio/Video
Encoder
MPEG
TS
Station-n
10
0M
LA
N
DAB Multiplexor
& Encoder
(DAB Ensemble)
Local Files
&
Emergency
Messages
Upconvertor
(VHF Band)
Power
Amplifier
Internet
Case study 1
DAB on campus
DAB has actually become a teaching facility of the university, and has benefited teaching and management.
The cost is approximately 100,000 USD, cheaper than any other networks.
Case study 2
DAB in part of city
The east part of Hailing district, Taizhou city, Jiangsu province.
It includes an industrial park and several residential areas
A 100W transmitter is built to covers an area of 80 square km, with a population of 120,000.
the cost is approximately 90,000 USD
Case study 3
DAB in a city
Foshan city, Guangdong Province
DAB has been in operation for 10 years using 2 KW transmitter
Alarm function will be added this year mainly for flood and storm.
It covers an area of 2000 squ km, with a population of 3,000,000.
the extra cost is estimated 120,000 USD
< Foshan broadcasting transmitter tower
^ Popular science on nature disaster
and safety guidance
Case study 4
DAB in a province
Guangdong Province, south of China
Some DAB stations have been in operation
Alarm function will be added gradually mainly for flood, storm, and tsnami.
It will cover an area of 150,000 squ km, with a population of 60,000,000.
the extra cost is estimated 3,000,000 USD
Useful in normal life
Information provision & propaganda
precaution & safety guidance
announcement
regulation & rules
Popular scientific knowledge related to work and daily life
Education
Conclusion
Digital broadcasting has inherent advantages for alarm and rescue management
also very useful in normal life for information, science knowledge, and education
It is much more reliable, cost effective, very efficient, easy built and easy use
Ideal for Asia and the Pacific
ESCAP workshop
Thank you
Guoyu Wang
CQUPT, China
wanggyb@cqupt.edu.cn
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