Introduction
Cable communication equipment mainly introduces serial communication, professional bus type communication, industry Ethernet communication, and conversion equipment between various communication protocols, mainly including the conversion equipment between the industrial site. Routers, switches, MODEMs and other devices. Wireless communication equipment mainly includes wireless APs, wireless bridges, wireless network cards, wireless arresters, antenna and other devices. Communications also includes military communications and civil communication, China's three major communication operators for mobile communications, Unicom communications and telecommunications.
China Communications Equipment Industry Status
2012 China Information Products Import and Export Trade Overview
According to the 2012 electronic information released by the Ministry of Industry and Information Technology Product import and export shows that China's communication equipment exports reached 149.3 billion US dollars, an increase of 14.8%; imports were $ 40.3 billion, an increase of 26.3%.
data shows that in 2012, the mobile export rate reached $ 81 billion, an increase of 29.1%, in electronic information products, its exports were ranked second. The first is the laptop, its export is 113.8 billion US dollars, an increase of 7.5%.
Overall, in 2012, China's electronic information product import and export is a small growth situation, and the total import and export is 1186.8 billion US dollars, an increase of 5.1%, and the growth rate falls over 6.4 percentage points over the previous year. Among them, the export is 698 billion US dollars, an increase of 5.6%, and the growth rate falls from 6.3 percentage points over the previous year; the import of 488.8 billion US dollars, an increase of 4.5%, and the growth rate falls over 6.5 percentage points over the previous year.
2012 China Communication Equipment Industry Export Situation is improved
The global macroeconomic situation in 2012 is not good, especially the European and American economic performances. However, since the fourth quarter, the economic situation has already improved the number of times in the communication equipment industry, which is the improvement of the export. According to the Ministry of Industry and Information Technology, the total export of electronic information products in my country is 698 billion US dollars in 12 years, an increase of 5.6%. Among them, the previous month's electronic information products exported US $ 67.6 billion, and the export of single month has a new high year, an increase of 9.2%. From the main industry, the export growth rate is large, the export growth of the communication equipment industry is the fastest, and the 12-year export is 149.3 billion US dollars, an increase of 14.8%, and the previous third quarter rebounded 2.4 percentage points.
To the product, the mobile phone export is obvious in the previous year after the negative growth in July. After entering the second half of the year, the export growth is also very significant.
China Telecom Industry Main Equipment Holds Wellness in the first half of 2013
Although main equipment manufacturers have poor performance in 2012, they have expressed in the announced annual report. For the future optimistic expectations. With the recovery of the global economy, operator capital expenditure will improve, we believe that the communication equipment industry can gradually pick up with the recovery of macroeconomics, and LTE will become a driving force for industry improvement.
Wired communication
Overview
Wired communication means that the communication device transmission needs to be connected to the cable, that is, the open cable, coaxial cable, fiber , Transmission media transmission information such as audio cable.
Advantages and Disadvantages
The biggest advantage of cable communication equipment is strong anti-interference, high stability, with a certain confidentiality, fast transmission rate, unlimited bandwidth; but wired communication A large impact, weak expansion, decay, large construction difficulty, poor mobility, high cost.
Wired communication device
Common wired communication devices are: computers, television, telephone, PCM, optical, servers, etc.
Wireless communication
Overview
wireless communication means communication that does not require a physical connection, that is, using an electromagnetic wave signal can be transmitted in free space. A communication method for exchange.
Advantages and Disadvantages
The biggest advantage of wireless communication devices is the environment, no restrictions on the line, with certain mobility, can communicate through wireless connection in mobile states, construction The difficulty is low, the cost is low; however, the wireless communication equipment is weak, the transmission rate is slow, the bandwidth is limited, the transmission distance is limited, and the cost is low. However, wireless communication is changing the corresponding technology to make the transmission rate (802, 11N speed can reach 100Mbps no less than wired communication), more stable and convenient, so wireless communication devices will be a development trend.
Wireless communication device
satellite, radio station, wireless TV (bus or subway), wireless local area network, mobile phone (mobile phone), mobile phone GPRS Internet access, etc.
Car devices
The in-vehicle terminal is a vehicle device for vehicle location services. It provides a vehicle equipment for vehicle users, navigation, anti-theft, anti-robbery, information release, Internet, games, and multimedia services.
Widely applicable to: public security, medical (120 ambulance), car rental, taxi dispatch, long-distance passenger freight and private needs vehicle safety monitoring.
Component
consists of GPS module, GSM module, control module, and peripherals.
GPS module receives communication navigation satellite positioning information, after the control module is calculated, the GSM module is sent to the GSM module, and the GSM module GPRS function will analyze the data, the GPS service platform further calculates the resolution, and become people Read information, people reappear, scheduling, managing, and controling vehicles. All data communication links are bidirectional.
Main function
1, positioning function: GPS After satellite positioning, the terminal liquid crystal display shows latitude and longitude, speed, orientation, altitude height, and monitor the target with GPRS or GSM Data Sendback Monitor Center;
2, auto-navigation function: self-container display target longitude, latitude, height, speed, receiving center navigation information;
3, robbery alarm function : When encountering a car road, start the concealed installation, driving indoor alarm button, the in-vehicle system will automatically send alarm signal to the monitoring center until the monitoring center responds;
4, tracking function: Vehicle Stolen After robbery, the monitoring center can automatically track the alarm vehicle;
5, send status function: Press the number key, you can send a good state (road block, fault, accident help, calling to the monitoring center) Wait);
6, text rotation function: The monitoring center sends a dispatch command, SMS, the terminal will automatically read; (optional)
7, remote control flameout function: During the rescue process of hijacking vehicles, the center can rescue that the remote control vehicles can force the flameout. The system has double insurance. The equipment failure will not cause accidental flameout;
8, offshore alarm function: The system can set the vehicle in advance Travel range, exceeding the range system automatically, the vehicle automatic voice prompt and icon display offline;
9, speed alarm function: The system can set the vehicle speed, exceeding the speed range system automatically The center alarm, the system automatically generates a statistical report;
10, driving track recording function: automatically record the vehicle driving data, the data records inside the Flash reservoir in the terminal, and the data will not be lost when an unexpected power is lost.
Arctic Equipment
Our daily mobile phones cannot be used in Polar Adventure and Mountaineering Adventures. This is because the GSM network cannot be overwritten, and additional satellite communication systems are required.
Explorer The most common satellite communication system has three, Motorola's quarium system, developed by the UAE and the GlobalStar system.
The comarter system consists of 66 low orbit satellites, so its coverage is best, which can really realize any call over the earth, but its data transfer speed is slow.
Tula Asian system is best in Himalayas, the data transfer speed is fast, and the call quality is also first-class. However, due to the limited number of satellite covers, it is the same as the GLOBALSTAR system, and cannot be used in polar exploration.
The GlobalStar system consists of 44 low orbit satellites, which provides first-class call quality and data transfer speed, and is very low.
The communication tools used by the Arctic Adventures are the Motorola's Iridium System. Relying on advanced communication compression software, the quarium system can also provide high-speed data transmission. The photos and videos seeing these days are back from the Arctic region from the Arctic region.