tailieunhanh - GSM and UMTS (P6)

US Regulatory Status in the 1990s During the first part of the 1990s, the regulatory climate in the US cellular environment was fashioned by the components of the time. The migration from analogue to digital was underway. The TDMA/FDMA debate had finished and a decision had been made (with TDMA winning) and the TDMA/CDMA public relations wars were in full swing. CDMA was thought by some to be the saviour of the world, capacity wise, and others were firmly committed to TDMA and some even to enhancements of TDMA. A new US President took office in 1993 and one of. | GSM and UMTS The Creation of Global Mobile Communication Edited by Friedhelm Hillebrand Copyright 2001 John Wiley Sons Ltd ISBNs 0-470-84322-5 Hardback 0-470-845546 Electronic Chapter 6 GSM Goes to North America Don Zelmer1 US Regulatory Status in the 1990s During the first part of the 1990s the regulatory climate in the US cellular environment was fashioned by the components of the time. The migration from analogue to digital was underway. The TDMA FDMA debate had finished and a decision had been made with TDMA winning and the TDMA CDMA public relations wars were in full swing. CDMA was thought by some to be the saviour of the world capacity wise and others were firmly committed to TDMA and some even to enhancements of TDMA. A new US President took office in 1993 and one of the concepts that was brought forward by his administration was the idea of auctioning spectrum to the highest bidder within certain bounds. The concept was further elaborated in that a portion of spectrum in the 1900 MHz band that had historically been used for point to point microwave and had recently been designated as Future Public Land Mobile Telecommunications System FPLMTS spectrum by the ITU would be auctioned by the US government. The idea was to relieve increasing capacity problems in the 850 MHz wireless band and to increase revenue to help to balance the US budget. With so many different options apparently available the US Federal Communications Commission FCC under the leadership of Reed Hundt came up with some novel concepts for licensing a portion of the FPLMTS band which eventually became known as Personal Communication Services PCS . A plan was put into place that would grant companies that proposed new and innovative technological concepts commercial licenses to try build and perfect their concepts which were called Pioneer Preference Licenses . The licenses were to be sold at a discount compared to the auctioned commercial licenses. In January 1994 three of the 50 .