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给予第三代移动通信标准族的总称是 IMT2000,虽然普通使用的是 UMTS(通用移动通信系统)或3G(第三代系统)。UMTS 用作欧洲提出的与 GSM 后向兼容建议的速记符号,而3G 或 CDMA2000指北美从 IS95产生的建议。各种标准组织仍有许多工作要做以完成 IMT2000的定义。有极需对付的实际难题,与第二代技术取得最佳兼容时要权衡互相冲突的优先考虑,还要尽可能抓住世界各地IMT2000会集的机会。IMT2000现在开始聚积动力。在日本,NTT 已明确宣布他
The generic term for the 3rd generation mobile communication standard family is IMT2000, although commonly used are UMTS (Universal Mobile Telecommunications System) or 3G (3rd Generation System). UMTS serves as shorthand notation for backward compatibility with GSM proposed by Europe, while 3G or CDMA2000 refers to North American recommendations arising from IS95. Much work remains to be done by various standards bodies to complete the definition of IMT2000. There are practical challenges that need to be tackled, trade-offs and conflicting priorities when best-in-class with second-generation technologies, and opportunities to be met by IMT2000 around the world. IMT2000 is now gathering momentum. In Japan, NTT has clearly announced him