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发表于 2005-10-29 20:39:41
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<P><FONT size=2><b>根据国际电信联合组织的网页</b>3G的官方解释:<a href="http://www.itu.int/osg/spu/ni/3G/technology/index.html" target="_blank" ><b>http://www.itu.int/osg/spu/ni/3G/technology/index.html</b></A></FONT></P><P><FONT size=2><B normal">Third generation (3G) </B>systems promise faster communications services, including voice, fax and Internet, anytime and anywhere with seamless global roaming. ITU’s IMT-2000 global standard for 3G has opened the way to enabling innovative applications and services (e.g. multimedia entertainment, infotainment and location-based services, among others). <U><FONT color=#f70909>The first 3G network was deployed in Japan in 2001.</FONT></U></FONT><FONT size=2> <P> 2.5G networks, such as GPRS (Global Packet Radio Service) are already available in some parts of Europe. </P></FONT></P><P><FONT size=2><U><FONT color=#f70909>Work has already begun on the development of <B>f</B></FONT></U></FONT><FONT size=2><U><FONT color=#f70909><B normal">ourth generation</B> <B normal">(4G) </B>technologies in Japan.</FONT></U> <P></P></FONT></P> |
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