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日期:2024-04-27
3G, short for third Generation, is the third generation of mobile telecommunications technology. 3G telecommunication networks support services that provide an information transfer rate of at least 200 kbit/s. Later 3G r ......
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日期:2024-04-30
2G (or 2-G) is short for second-generation wireless telephone technology. Second generation 2G cellular telecom networks were commercially launched on the GSM standard in Finland by Radiolinja (now part of Elisa Oyj) in ......
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日期:2024-04-23
Later 3G releases, often denoted 3.5G and 3.75G, also provide mobile broadband ... EDGE, a revision by the 3GPP organization to the older 2G GSM based ......
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日期:2024-04-25
2G technologies enabled the various mobile phone networks to provide the ...
and for Internet communication services such as email and World Wide Web ......
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日期:2024-04-29
从用户需求的角度看,4G能为用户提供更快的速度并满足用户更多的需求。 ... 仍
可以被認為是“4G”,但前提是它們是先行者,以IMT-Advanced的標準版本和改善的
性能和功能來看它只是相當於現在部署的3G網路的程度。 .... (3.5G, 3.75G, 3.9G) ......
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日期:2024-04-27
3G规范是由國際電信聯盟(ITU)所制定的IMT-2000規格的最終發展結果。 ... 另外有些3G系統服務業者會更新為3.5G系統(如HSDPA),此時可有下傳14Mbps、 ......
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日期:2024-04-23
2.5G是夾在2G與3G中間、手機通訊技術規格的過渡期。用來形容比2G連線 ... 2.5G 系統能夠提供一些在3G才有的特別功能,如包交换技術。 ... (3.5G, 3.75G, 3.9G) ......
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日期:2024-04-25
A 4G system, in addition to the usual voice and other services of 3G, provides .... since the first move from 1981 analog (1G) to digital (2G) transmission in 1992. ...... or US$58,000,000, on developing 4G and even 5G technologies, with the goal ......