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The first handheld mobile cell phon

The first handheld mobile cell phone was demonstrated by Motorola in 1973. The first commercial automated cellular network was launched in Japan by NTT in 1979. In 1981, this was followed by the simultaneous launch of the Nordic Mobile Telephone (NMT) system in Denmark, Finland, Norway and Sweden.[7] Several other countries then followed in the early to mid-1980s. These first generatiion ("1G") systems could support far more simultaneous calls, but still used analog technology.

In 1991, the second generation (2G) digital cellular technology was launched in Finland by Radiolinja on the GSM standard, which sparked competition in the sector, as the new operators challenged the incumbent 1G network operators.

Ten years later, in 2001, the third generation (3G) was launched in Japan by NTT DoCoMo on the WCDMA standard.[8] This was followed by 3.5G, 3G+ or turbo 3G enhancements based on the high-speed packet access (HSPA) family, allowing UMTS networks to have higher data transfer speeds and capacity.

By 2009, it had become clear that, at some point, 3G networks would be overwhelmed by the growth of bandwidth-intensive applications like streaming media.[9] Consequently, the industry began looking to data-optimized 4th-generation technologies, with the promise of speed improvements up to 10-fold over existing 3G technologies. The first two commercially available technologies billed as 4G were the WiMAX standard (offered in the U.S. by Sprint) and the LTE standard, first offered in Scandinavia by TeliaSonera.
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第一次手持移动手机是 1973 年由摩托罗拉公司展示的。第一次商业自动化蜂窝网络是在 1979 年 NTT 在日本推出。1981 年,其后由丹麦、 芬兰、 挪威和瑞典的北欧移动电话 (NMT) 系统同时启动。[7] 几个其他国家接着跟着初到 20 世纪 80 年代中期。这些第一次的 generatiion ("1 G") 系统可以支持更多的同步调用,但仍使用模拟技术。1991 年,第二代 (2g) 数字蜂窝技术于芬兰 Radiolinja 基于 GSM 标准的由引起竞争领域,作为新的运营商挑战现任 1 G 网络营办商。十年后,于 2001 年,第三代 (3g) 成立在日本 NTT DoCoMo 的 WCDMA 标准。[8] 这跟着 3.5G,3 + 或涡轮 3g 增强基于高速分组接入 (HSPA) 的家庭,允许 UMTS 网络,具有较高的数据传输速度和容量。2009 年,它已经清楚,在某种程度上,3g 网络会不知所措带宽密集型应用程序 (如流媒体的增长。[9] 因此,行业开始期待数据优化的第四代技术,速度提高达 10 倍于现有 3g 技术的承诺。号称 4g 的前两个商用技术 WiMAX 标准 (在美国由冲刺 (sprint) 提供),LTE 标准,首次提出在斯堪的那维亚 TeliaSonera。
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第一个手持移动手机证明了摩托罗拉在1973年的第一个商业自动化的蜂窝网络在日本推出由NTT于1979年在1981年,在这之后,在丹麦同步推出的北欧移动电话(NMT)系统,芬兰,挪威和瑞典。[7]等一些国家则紧跟在早80年代中期。这些第一generatiion(“1G”)系统可以支持更同时呼叫,但仍使用模拟技术,在1991年,第二代(2G)数字蜂窝技术在芬兰推出的Radiolinja GSM标准,这在引发竞争部门,作为新的经营挑战现任1G的网络运营商。十年后,在2001年,第三代(3G)在日本的WCDMA标准的推出由NTT DoCoMo公司。[8]其次为3.5G,3G +或基于高速分组接入涡轮3G增强(HSPA)家族,允许UMTS网络具有更高的数据传输速度和容量。到2009年,它已变得清楚的是,在某些时候,3G网络将由生长淹没带宽密集型应用,如流媒体。[9]因此,业界开始寻求数据优化的第四代技术,具有速度提升高达10倍,比现有3G技术的承诺。号称4G的前两个商用技术是WiMAX标准(由Sprint提供在美国)和LTE标准,在斯堪的纳维亚首先提供的TeliaSonera公司。





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第一手持移动手机是1973由摩托罗拉证明。第一个商业自动化的蜂窝网络在日本推出由NTT 1979。1981,其次是北欧移动电话的同时推出(NMT)在丹麦,芬兰,挪威和瑞典。[ 7 ]其他几个国家,然后在早期的20世纪80年代中期。这些第一代(“1G”)系统可以支持更多的并发呼叫,但仍然使用模拟技术。

1991,第二代(2G)数字蜂窝技术在芬兰推出的Radiolinja在GSM标准,这引起了行业的竞争,作为新的运营商的挑战现任1G网络运营商

。十年后,在2001,第三代(3G)在日本推出由NTT DoCoMo在WCDMA标准。[ 8 ]其次是3.5G,3G或Turbo 3G增强基于高速分组接入(HSPA)的家庭,使UMTS网络具有较高的数据传输速度和容量。

2009,它已成为明确的这样,在一些点,3G网络将被像流媒体带宽密集型应用的发展。[ 9 ]因此,该行业开始寻找数据优化的第四代技术,随着速度提高了10倍于现有的3G技术的承诺。第一个商业上可用的技术,称为4G是WiMAX标准(在美国提供了Sprint)和LTE标准,首次提出在斯堪的纳维亚TeliaSonera公司。
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