I. Overview of Meteorological Disaster Early Warning Broadcasting System
In recent years, due to the combined effects of human activities and natural factors, the global climate has been warming year by year, a wide range of irregular and abnormal weather has continued to occur, and extreme weather events have frequently occurred, bringing significant impacts on social and economic development and the safety of people's lives and property. Destruction also directly threatens the ecological environment on which human beings depend. The convening of the "Copenhagen World Climate Conference" confirms that governments and international organizations attach great importance to this, and that coping with the complex and changing climate environment has become an important issue concerning humankind and the world.
China has a vast territory, complex terrain, and a monsoon climate. Extreme weather and climate events cause frequent disasters. Heavy rain, floods, drought, cold damage, freezing damage, cold damage, snowstorm, hail, heavy fog, thunderstorms, tornadoes, high winds, heat waves, and sandstorms. , Dry hot wind, continuous rain, tropical cyclones and other meteorological disasters occur from time to time. Especially in recent years, the weather has often gone extreme. Meteorological disasters are characterized by many types, wide ranges, and high intensity. The annual losses caused by meteorological disasters account for about 70% of the total natural disasters, and the direct economic losses caused by them are about 3-6% of GDP. The use of scientific and technological means to prevent and reduce disasters has become an important policy content of governments at all levels, water conservancy bureaus, meteorological units, radio and television bureaus, and flood control and drought relief offices.
Beijing Hiteway Technology Co., Ltd. is the first in China to design, develop and launch a weather disaster early warning broadcast system based on a wireless mobile network covering the whole country. This system adopts the international advanced Internet, cellular network bandwidth transmission, UTP / Gn access, embedded text-to-speech conversion, LED display control and other technologies. The system is designed to integrate "wireless text-to-speech emergency broadcasting" and "wireless LED display screen release." "Meteorological disaster early warning broadcast system. It can quickly, timely and accurately disseminate all kinds of information, especially the meteorological disaster warning information to the public, expand the coverage of meteorological information, solve the problem of the "last mile" of meteorological information, improve the capability of meteorological disaster warning, and achieve maximum disaster prevention and reduction the goal of.
Functional characteristics of meteorological disaster early warning broadcasting
2.1 Meteorological disaster warning broadcast function
Text-to-speech conversion: Supports meteorological and other information text-to-speech output.
LED display: Supports weather and other information text to LED display.
Regular broadcast: Supports automatic voice broadcast and LED display of weather and other information.
Emergency broadcast: support manual sending of information, emergency automatic voice broadcast and LED display.
Broadcasting settings: support voice male / female voice selection, tone and speed can be set as required.
Display settings: Support LED display text scroll speed setting.
Identity authentication: Support the identity lock and authentication of the sender of the information, and illegal information will not be received and broadcast.
Status monitoring: Support real-time monitoring of the sending status, and the software has a clear prompt for the success of the information sending.
Peripheral control: support automatic control function of amplifier power.
Multi-text: Support GB2312, GBK, BIG5, UNICODE four internal code format text.
2.2 Characteristics of meteorological disaster early warning broadcasting
Wide area coverage: Wireless mobile networks have good coverage in cities and rural areas in 31 provinces across the country. Basically, meteorological disaster warning broadcasts can be transmitted where mobile phones can make calls.
Always online: The system will remain online as long as the wireless early warning broadcast application is activated, similar to wireless dedicated line network services.
Charge by volume: Although the wireless dedicated line network service is always online, it is charged only when communication traffic is generated, and the cost is low.
High-speed transmission: Adopting cellular network bandwidth transmission, it can support the peak transmission rate of 53.6Kbps, with high transmission rate and fast transmission speed.
Real-time publishing: Publish and receive information at any time, and can display and broadcast regularly or immediately.
Unlimited expansion: It can be used anywhere in the country as long as the wireless GPRS network covers it, regardless of distance and location.
Easy installation: As long as there is a wireless mobile network, the weather disaster warning broadcast terminal can be powered on.
Composition of meteorological disaster early warning broadcasting
3.1 Meteorological disaster early warning broadcast publishing platform
Establish meteorological disaster early warning broadcast publishing platforms in provinces, cities, counties or towns, and regularly / manually release comprehensive information on various types of meteorology, flood control, disasters, agriculture, science and technology, and affairs, and send them over the air via wireless mobile networks.
3.2 Meteorological disaster early warning broadcast receiving terminal
Establish meteorological disaster early warning broadcast receiving terminals in districts, towns or villages, scroll the LED information of the release information through the electronic display screen, and convert it into voice (male voice, female voice optional). Play through the existing loudspeaker through the loudspeaker (tweeter) . The meteorological information will be notified in real time so that farmers can take precautions.
Note: The speed and frequency of text scrolling, and the number of voice broadcasts of the tweeter can be set at will according to the needs of the meteorological disaster warning release platform.
4. Principles of meteorological disaster early warning broadcasting
4.1 Principle of Meteorological Disaster Warning Broadcasting
Meteorological service / scientific information release staff, by operating and using the Internet weather meteorological disaster early warning broadcast platform, will regularly or manually release weather forecast, pest and disease disasters, geological disasters, science and technology, agriculture, current policies, emergency situations and other information . The released information and data are grouped, encapsulated, and sent to the Internet for transmission via the TCP / IP protocol. The Gn interface of the Internet backbone network is connected to the GTP tunneling protocol of the wireless mobile communication network. The weather disaster is reported using the UPP / IP protocol report as the carrier The warning broadcast information is sent to the wireless mobile communication network.
The wireless mobile communication network has good coverage in cities and rural areas in 31 provinces across the country. Basically, there is a wireless mobile communication network where mobile phones can make calls. Meteorological disaster early-warning broadcast information is covered by packet switching transmission in wireless mobile communication networks through wireless cellular broadband network transmission technology.
Meteorological disaster early warning broadcasting (also called wireless early warning) terminal is based on wireless mobile communication network for data and voice communication. It can realize the conversion of CDMA / GSM / GPRS data, text, short messages, direct phone dialing into analog voice signals and carry out Enlarged input can convert CDMA / GSM / GPRS data, text, and short messages into LED real-time display. The status of the received information can be reported to the meteorological disaster early warning broadcast platform.