The process of changing from 1G to 5G mobile communication

       According to the official website of China Quality Certification Center, 8 5G mobile phones have obtained 3C certification. Among them, Huawei has 4 models, one for each, one for ZTE, one for vivo and one for OPPO. This means that the next 5G mobile phones will begin to enter the market stage. The so-called G (generation) is the meaning of generations and generations. From the earliest 1G to the current 4G, and 5G, the upgrade of each generation of mobile communication, the speed of information transmission will double. And the change of each generation has brought new changes to our lives.

1G era: voice transmission only

      1G (first generation) represents the first generation of mobile communication technology, based on analog technology, cellular wireless telephone systems, such as the analog mobile network that has now been phased out. 1G wireless systems are designed to transmit only voice traffic and are limited by network capacity. In the streets of the 1G era, there are public telephone booths and people waiting to make phone calls. Everyone has a BB on their belts.

2G era: mobile phones can go online

      The second generation of mobile communication technology specifications, with digital voice transmission technology as the core. Generally defined as the inability to directly transmit information such as e-mail, software, etc.; only has a call and some mobile communication technical specifications such as time and date. However, SMS is able to be implemented in some of its specifications, which is commonly referred to as "personal communication service" in the United States.

      In the 2G era, mobile phones are still not so popular. They are just a tool for making calls. People who want to go online can only squeeze in the Internet cafes with people who play games. The signal of PHS is not good, so there is no connection. Will choose to generate reports and faxes.

3G era: wireless Internet access anytime, anywhere

     3G is a third-generation mobile communication technology, which refers to cellular mobile communication technology that supports high-speed data transmission. 3G services can transmit both voice and data information at a rate of several hundred kbps or more. 3G refers to a new generation mobile communication system that combines wireless communication with multimedia communication such as the Internet.

      In the 3G era, the most popular mobile phones are iPhone 3G. At that time, the screen of the mobile phone was not big. There was a rear camera but the pixels were not high-definition. Although there was no front camera that couldn't take a self-portrait, it was only honestly listening to the song. It was impossible to use the camera at the same time, and the network was slow and scary. Still text messaging and QQ, the Internet still needs to dial up.

4G era: 2000 times faster than dial-up Internet access

      The fourth-generation mobile phone mobile communication standard refers to the fourth-generation mobile communication technology. 4G is a combination of 3G and WLAN, and can quickly transmit data, high-quality audio, video and images. 4G can download at speeds of more than 100 Mbps, 25 times faster than home broadband ADSL (4 megabytes), and can meet the requirements of almost all users for wireless services. In addition, 4G can be deployed where DSL and cable modems are not covered and then extended to the entire region. Obviously, 4G has incomparable superiority.

5G era: Internet of Everything

     The fifth generation of mobile communication technology is the latest generation of cellular mobile communication technology, and is an extension of 4G (LTE-A, WiMax), 3G (UMTS, LTE) and 2G (GSM) systems. 5G's performance goals are high data rates, reduced latency, energy savings, reduced costs, increased system capacity and large-scale device connectivity.

     The peak rate reaches the Gbit/s standard to meet high-definition video, virtual reality and other large data volume transmission; the air interface delay level needs to be around 1ms, which meets real-time applications such as autonomous driving and telemedicine; and the large network capacity provides hundreds of billions of equipment. The connection capability meets IoT communication; the spectrum efficiency is 10 times higher than that of LTE; the user experience rate reaches 100 Mbit/s under continuous wide-area coverage and high mobility; the traffic density and connection density are greatly improved; system synchronization The level of intelligence is improved, which is characterized by multi-user, multi-point, multi-antenna, multi-intake collaborative networking, and flexible automatic adjustment between networks.

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