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