Communication has different interpretations in different environments. After the emergence of radio wave transmission communication, communication is simply interpreted as the transmission of information, which refers to the transmission and exchange of information from one place to another, and its purpose is to transmit messages. However, communication is in the process of human practice, with the development of social productivity, the requirements for the transmission of information continue to improve and make human civilization continue to progress. Among all kinds of communication methods, the one that uses electricity to transmit messages is called Telecommunication. Telecommunication is rapid, accurate and reliable, and is almost not limited by time, place, space and distance. Nowadays, due to the fast speed of radio waves, physical communication (postal communication), which has been combined with cultural exchange and real economy since the material exchange of ancient human beings, is understood by human beings as an obstacle to economic development.
In ancient times, people transmitted information through post stations, flying pigeons, beacon alarms, signs, body language, eyes, touch and other ways.
With the rapid development of modern science, various communication methods such as radio, fixed phone, mobile phone, Internet and even video phone have appeared one after another. Communication technology has narrowed the distance between people, improved the efficiency of economy, and profoundly changed the way of life and social outlook of human beings