Deciphering the History of Development and Change of Mobile Communication Technology What is communication? (1)

In ancient times, human beings transmitted information through post stations, flying pigeons, and beacon fire alarms. This was the first communication. With the rapid development of modern science, radio, fixed telephone, mobile telephone, and even video telephones have appeared one after another. Various means of communication. It can be said that communication technology has shortened the distance between people, improved the efficiency of the economy, and profoundly changed the way of life and society of human beings.

The types of communication are further divided into wired communication in the form of wires, cables, optical cables, waveguides, nanomaterials, etc., and wireless communication in which the transmission medium is invisible and intangible (such as electromagnetic waves). Wired communication such as optical fiber is relatively mature now. We will not talk too much about it this time. What I want to talk to you about today is how far from the road of wireless communication has come and what periods it is divided into.

1G network

The main 1G system is AMPS, as well as NMT and TACS, which are widely used in Canada, South America, Australia and the Asia-Pacific region. However, because the analog communication system has many defects, the phenomenon of serial number and number theft often occurs, which brings a lot of troubles to operators and users. So in 1999, the A and B networks were officially closed, and the 2G era also came to us.

2G network：

Compared with first-generation mobile communication, second-generation mobile communication has a high degree of confidentiality, and the system capacity is also increasing. At the same time, mobile phones can also access the Internet from this generation.

The sound quality of 2G is better, and it has more data transmission services than 1G. The data transmission speed is 9.6-14.4Kbit per second, and the earliest text messages have also begun.

GSM was developed in Europe in 1990, so it is also known as a pan-European mobile communication system, as well as TDMA, CDMA, PDC and iDEN. The first GSM mobile phone to support WAP was the Nokia 7110. Its appearance marked the beginning of the era of mobile Internet access, and the speed of GSM in that era was only 9.6KB/s.