Technically generations are defined: 从技术角度的划分:1G networks (NMT, C-Nets, AMPS, TACS) are considered to be the first analog cellular systems, which started early 1980s.第一代移动通信网络技术始于1980年早期(NMT, C-Nets, AMPS, TACS)被认为是第一代模拟蜂窝式系统.2G networks (GSM, cdmaOne, DAMPS) are the first digital cellular systems launched early 1990s.第二代移动通信网络技术始于1990年早期(GSM, cdmaOne, DAMPS)是第一代数字蜂窝式系统2.5G networks (GPRS, cdma2000 1x) are the enhanced versions of 2G networks with data rates up to about 144kbit/s.2.5代移动通信网络技术(GPRS,cdma2000 1x)在数据传输方面可达144kbit/s被称为增强型的第二代移动通信网络技术3G networks (UMTS FDD and TDD, cdma2000 1x EVDO, cdma2000 3x, TD-SCDMA, Arib WCDMA, EDGE, IMT-2000 DECT) are the latest cellular networks that have data rates 384kbit/s and more. 第三代移动通信网络技术(UMTS FDD and TDD, cdma2000 1x EVDO, cdma2000 3x, TD-SCDMA, Arib WCDMA, EDGE, IMT-2000 DECT)是最新式的蜂窝网络可承载的数据传输量可高达384kbit/s甚至更多4G is mainly a marketing buzzword at the moment. Some basic 4G research is being done, but no frequencies have been allocated. The Forth Generation could be ready for implementation around 2012.第四代移动通信网络技术目前尚属谣传. 某些基层的4G研究正在进行但所选频段尚未确定.第四代移动通信网络技术可能在2012年得到应用.
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