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PPT : The History of Mobile Radio Communication
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The History of Mobile Radio Communication (1/3)
* 1880: Hertz – Initial demonstration of practical radio communication
* 1897: Marconi – Radio transmission to a tugboat over an 18 mi path
* 1921: Detroit Police Department: — Police car radio dispatch (2 MHz frequency band)
* 1933: FCC (Federal Communications Commission) – Authorized four channels in the 30 to 40 MHz range
* 1938: FCC – Ruled for regular service
* 1946: Bell Telephone Laboratories – 152 MHz (Simplex)
* 1956: FCC – 450 MHz (Simplex)
* 1959: Bell Telephone Laboratories – Suggested 32 MHz band for high capacity mobile radio communication
* 1964: FCC – 152 MHz (Full Duplex)
* 1964: Bell Telephone Laboratories – Active research at 800 MHz
* 1969: FCC – 450 MHz (Full Duplex)
* 1974: FCC – 40 MHz bandwidth allocation in the 800 to 900 MHz range
* 1981: FCC – Release of cellular land mobile phone service in the 40 MHz bandwidth in the 800 to 900 MHz range for commercial operation
The History of Mobile Radio Communication (2/3)
* 1981: AT&T and RCC (Radio Common Carrier) reach an agreement to split 40 MHz spectrum into two 20 MHz bands. Band A belongs to nonwireline operators (RCC), and Band B belongs to wireline operators (telephone companies). Each market has two operators.
* 1982: AT&T is divested, and seven RBOCs (Regional Bell Operating Companies) are formed to manage the cellular operations
* 1982: MFJ (Modified Final Judgment) is issued by the government DOJ. All the operators were prohibited to (1) operate long-distance business, (2) provide information services, and (3) do manufacturing business
* 1983: Ameritech system in operation in Chicago
* 1984: Most RBOC markets in operation
* 1986: FCC allocates 5 MHz in extended band
* 1987: FCC makes lottery on the small MSA and all RSA licenses
* 1988: TDMA (Time Division Multiple Access) voted as a digital cellular standard in North America
* 1992: GSM (Groupe Speciale Mobile) operable in Germany D2 system
The History of Mobile Radio Communication (3/3)
* 1993: CDMA (Code Division Multiple Access) voted as another digital cellular standard in North America
* 1994: American TDMA operable in Seattle, Washington
* 1994: PDC (Personal Digital Cellular) operable in Tokyo, Japan
* 1994: Two of six broadband PCS (Personal Communication Service) license bands in auction
* 1995: CDMA operable in Hong Kong
* 1996: US Congress passes Telecommunication Reform Act Bill
* 1996: The auction money for six broadband PCS licensed bands (120 MHz) almost reaches 20 billion US dollars
* 1997: Broadband CDMA considered as one of the third generation mobile communication technologies for UMTS (Universal Mobile Telecommunication Systems) during the UMTS workshop conference held in Korea
* 1999: ITU (International Telecommunication Union) decides the next generation mobile communication systems
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