Since then, human information transmission can be separated from the conventional audio-visual way, using electrical signals as a new carrier, bringing a series of iron technological innovations and opening a new era of human communication.
From 2.65438 to 0837, American Samuel Morse successfully developed the world's first electromagnetic telegraph. With his own code, he can convert information into a series of long or short electric pulses and send them to the destination, and then convert them into original information.
1844 On May 24th, Morris sent the first telegram in human history in the conference hall of the Federal Supreme Court of the Capitol, thus realizing long-distance telegraph communication.
3. 1864, British physicist J.c.Maxwel established a set of electromagnetic theory, predicted the existence of electromagnetic waves, and explained that electromagnetic waves and light have the same properties, and both of them travel at the speed of light.
4. 1875, the Scottish youth A.G. Bell invented the world's first telephone. And applied for an invention patent in 1876. 1878, the first long-distance telephone experiment was conducted between Boston and new york, which are 300 kilometers apart, and it was successful. Later, the famous Bell Telephone Company was established.
5. During the period of1888, the young German physicist H.R. Hertz conducted a series of experiments with radio circuits and discovered the existence of electromagnetic waves. He proved Maxwell's electromagnetic theory by experiments. This experiment caused a sensation in the whole scientific community and became an important milestone in the history of modern science and technology, which led to the birth of radio and the development of electronic technology.
Extended data
1, the interconnected movement across time and space: the rapid development of mobile communication capabilities and the nationwide networking.
Mobile communication capabilities have developed rapidly. During the ten years from 1988 to 1997, China experienced the first peak of mobile communication development, and the capacity of mobile switches soared from less than 30,000 to 25.857 million, which was 86 1 times higher than that in 10.
China's 900MHz TACS system mainly imports switches, base stations and control systems from Motorola (A network) and Ericsson (B network). By the end of 1995, 2 1 provinces and cities covered by a network and 15 provinces and cities covered by b network had realized automatic roaming, forming a real national networking.
1994, China Unicom was established by the Ministry of Electronics in conjunction with the Ministry of Railways, the Ministry of Electric Power and the Ministry of Radio, Film and Television. 1998, China Telecom was separated from the then Ministry of Posts and Telecommunications. 1999, netcom was established.
2. Layout reorganization for ecology: The "M-Zone" was introduced to the whole country, and the restructuring of the telecommunications industry began.
200 1, China Mobile Guangdong Branch held a brand promotion meeting in Guangzhou and Shenzhen, and "M-Zone" was piloted as a new brand. In 2003, China Mobile officially promoted the "M-Zone" brand to the whole country, becoming the first customer brand in the history of mobile communication in China.
In August 2006, the New York Stock Exchange closed at $33.42, with a total market value of $65.438+032.58 billion, making China Mobile the highest telecom operator in the world. In 2007, China Mobile successfully acquired Paktel.
From June 5, 2004 to 10, the village-to-village communication project was implemented nationwide. By the end of 2007, six basic telecommunications enterprises had newly opened telephones for 3759 administrative villages without telephones, accounting for 99.5% of the administrative villages in China, and all the administrative villages in 29 provinces, autonomous regions and municipalities had telephones. In May 2007, the government continued to start the village-to-village communication project in natural villages across the country, forming a situation in which administrative villages and natural villages go hand in hand.
In March 2007, China Mobile officially launched the bidding for TD-SCDMA network construction with more than 20 billion yuan, and the competition among the four camps composed of many Chinese and foreign enterprises was fierce.
In May 2008, the restructuring of the telecommunications industry began. Subsequently, the Ministry of Industry and Information Technology jointly issued the Notice on Deepening the Reform of Telecommunication System. According to the notice, China Telecom is encouraged to acquire the CDMA network of China Unicom, China Unicom and China Netcom are merged, the basic telecom business of China Satellite TV is merged into China Telecom, and China Tietong is merged into China Mobile. After the completion of this reform and reorganization, 3G licenses will be issued.
Experts say that telecom restructuring lies in breaking monopoly. With the development of communication technology, the trend of mobile replacing fixed telephone is more and more obvious. After the reorganization, all three operators have full-service capabilities, forming a fully competitive pattern.
3. In the inter-generational grand plan standard, the growth rate of the communication industry is high, and 5G will drive the next round of development of the communication industry.
At the National Conference on Industry and Informatization held not long ago, the Ministry of Industry and Information Technology identified a number of key tasks in 20 18 years. It involves strengthening the supervision of the information and communication market. According to the relevant documents of the Ministry of Industry and Information Technology, it is planned to carry out VoLTE number portability technology experiments and study and formulate a national promotion plan for number portability.
According to the data of the Ministry of Industry and Information Technology, after preliminary accounting, the total telecom business in 20 17 years reached 2,755.7 billion yuan (calculated at the constant unit price of 20 15 years), an increase of 76.4% over the previous year and a year-on-year increase of 42.5 percentage points; The revenue of telecom business was 65.438+26.2 billion yuan, up 6.4% over the previous year, and the growth rate increased by 654.38+0 percentage points.
From 20 18 to 1-2 months, the total telecom business reached 685.3 billion yuan, up1/7% year-on-year; The revenue from telecom business was 2 168 billion yuan, up 4.9% year-on-year.
In recent years, China's communication industry has developed rapidly, and its main business indicators are improving. 5G will be the next development opportunity. On August 20 17, the State Council issued "Guiding Opinions on Further Expanding and Upgrading Information Consumption to Release the Potential of Domestic Demand", which pointed out that "the research, technical test and industrial promotion of the fifth generation mobile communication (5G) should be accelerated, and the commercialization should be started in 2020".
Due to the broad application prospects of 5G, the battle for the commanding heights of 5G strategy is surging.
People's Network-Forty years of agitation, the communication industry has changed our lives.
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