[20010117]RS20664_第三代（“3G”）移动无线技术和服务.pdf

1 Standard and Poors Industry Survey. Telecommunications: Wireless, p. 2-4. June 22, 2000.2 The first generation of mobile wireless services was the original analog cellular telephone systemfirst deployed in the early 1980s in the United States. The second generation is the digital mobilewireless network known in the United States as personal communications services (PCS) and asDCS-1800 in Europe, deployed in the mid-1990s.Congressional Research Service ? The Library of CongressCRS Report for CongressReceived through the CRS WebOrder Code RS20664Updated January 17, 2001Third Generation (“3G”) Mobile WirelessTechnologies and ServicesRichard M. NunnoSpecialist in Information TechnologiesResources, Science, and Industry DivisionSummaryRapid growth in the number of subscribers of mobile wireless telecommunicationsservices in the United States and abroad is fueling interest and developments in the nextgeneration of wireless technology services, known as 3G. 3G services might includehigh-speed mobile Internet access and the ability to use the same handset anywhere in theworld. Issues related to the implementation of 3G center mainly on the allocation ofspectrum and adoption of technology