Mobile communication is the communication between mobile bodies, or between mobile bodies and fixed bodies. The moving body can be a person, but also can be a car, train, ship, radio and other objects in the moving state.
Mobile communication is a modern technology for wireless communication. This technology is one of the important achievements in the development of computer and mobile Internet. Mobile communication technology after the first generation, the second generation, the third generation, the fourth generation of technology development, at present, has entered the era of the development of the fifth generation (5G mobile communication technology), which is also one of the main technologies to change the world.
Modern mobile communication technology can be mainly divided into low frequency, intermediate frequency, high frequency, very high frequency and ultra-high frequency bands, in these bands, technicians can use mobile station technology, base station technology, mobile switching technology, mobile communication network terminal equipment to connect to meet people's mobile communication needs. From analog mobile communication system, digital cellular communication system, mobile multimedia communication system, to the current high-speed mobile communication system, the speed of mobile communication technology continues to improve, the delay and error phenomenon is reduced, the stability and reliability of technology continues to improve, providing a variety of flexible communication methods for people's production and life. [1]
In the past half century, the development of mobile communication has had a profound impact on people's life, production, work, entertainment and even politics, economy and culture. The drone, smart home, network video, online shopping and so on, which were dreamed of 30 years ago, have all been realized. Mobile communication technology has experienced five development stages: analog transmission, digital voice transmission, Internet communication, personal communication, and new generation wireless mobile communication.