1G (or 1-G) is the first generation of wireless telephone technology and mobile telecommunications. These are analog telecommunication standards [1] , which were introduced in the 1980s, and in the early 90s were supplanted by more advanced 2G digital technology. The main difference between 1G and 2G systems is that 1G networks use analog modulation of radio signals, while 2G networks are digital, which allows, among other things, to encrypt conversations and send SMS .
Standards 1-G
The first 1-G standard was NMT (Nordic Mobile Telephone) [1] , used in the countries of Northern Europe, Switzerland, the Netherlands, Eastern Europe and Russia. Other standards include AMPS (Advanced Mobile Phone System) [1] used in North America and Australia, TACS [1] (Total Access Communications System) in the UK, C-450 in West Germany, Portugal and South Africa, Radiocom 2000 in France and RtMI in Italy. There were several systems in Japan. NTT developed three standards (TZ-801, TZ-802 and TZ-803), while a competing system running DDI used the JTACS standard (Japan Total Access Communications System).
In 1G networks, the actual download speed ranged from 2.9 Kb / s to 5.6 Kb / s. The forerunner of 1G technology is mobile radiotelephone communication (or the “zero generation” 0G standard ).
History
The first commercial automated cellular network (1G generation) NTT (Nippon Telegraph and Telephone) was launched in 1979 in Japan, initially in the metropolitan area of Tokyo [2] . Within five years, the NTT network was expanded to cover the entire population of Japan, becoming the first nationwide 1G network [3] .
In 1981, the system was launched in Denmark, Finland, Norway and Sweden. NMT became the first mobile network with international roaming launched the Nordic Mobile Telephone ( NMT ) system. The first 1G network launched in the USA was the Chicago-based Ameritech, founded in 1983 using a Motorola DynaTAC mobile phone.
Notes
- ↑ 1 2 3 4 Clear Your Doubts What is 1G or First generation of wireless telecommunication technology?
- ↑ Marcel Danesi. Encyclopedia of Media and Communication .
- ↑ Unhelkar, Bhuvan. Handbook of Research in Mobile Business: Technical, Methodological, and Social Perspectives: Technical, Methodological, and Social Perspectives .