In the past 46 years, what kind of transformation has the mobile phone experienced before it has gradually developed into the current form? Today we will talk about the past and present of mobile phones.
First generation mobile communication
Mobile communication, the so-called “mobile”, its distinctive feature is wireless. Since the beginning of the last century, research on wireless telephony has yielded significant results.
In 1902, Nathan Stubblefield announced his invention of a mobile phone device: he built a 120-foot antenna in his orchard, using a magnetic field to transmit voice from one phone to another. Although this wireless phone is as large as a trash can, it still has removable features.
In 1938, Bell Labs of the United States built the first mobile phone for the US military, and its appearance can be said to be the prototype of modern mobile phones.
In April 1973, Motorola engineer Martin Cooper opened the first mobile phone in the streets of New York to promote civilian use, which is recognized as the beginning of modern mobile phones. Ten years later, the world’s first mobile phone for civilian use, the Motorola Dyna TAC 8000X, was finally available. The $3,995 mobile phone weighs two pounds and can talk for two hours.
Second generation mobile communication
Compared with the 1G analog signal, the digital 2G mobile communication has the advantages of higher security, higher spectrum utilization, and functions not only limited to calls but also relatively uniform standards. The second generation mobile communication systems currently used are the European GSM system and the narrowband CDMA system in North America.
Third generation mobile communication
The third generation mobile communication 3G network can provide more advanced service functions and higher network capacity than 2G. In terms of data transmission, 3G mobile phones can achieve wireless broadband access or close to wireless broadband access, similar to a larger WiFi network.
Fourth generation mobile communication
The fourth generation of mobile communication 4G compared with the previous 3G, the main feature is the high data transmission rate, through a comprehensive and secure IP solution, 4G enables mobile phone users to receive voice, data and stream “anytime, anywhere” media. 4G users can enjoy richer mobile communication services at faster transmission rates, including IPTV, streaming audio/video, digital video broadcasting, video chat and more.
Fifth generation mobile communication
The most prominent feature of the fifth-generation communication network is that the network speed is faster. If 5G doubles the Internet speed on the basis of 4G, or doubles or triples, then its role is really small. The key point is that compared to 4G, 5G has a speed of tens or even hundreds of times. It is reported that the peak speed can reach 20Gbps. Of course, the initial 5G network should not reach the peak speed. We will see that the change brought by 5G will also be a process of gradually changing with the increase in network speed.
Of course, the speed is not the full feature of the 5G network. It also has the characteristics of low latency and high capacity. It is also such a feature that distinguishes 5G from 4G and has the ability to interconnect everything, such as cloud games and cloud computers. Human driving, smart agriculture, telemedicine, smart city, smart home and other applications.