IT 802D Mobile Communications Debasis Das
History of   Mobile Systems-1 <ul><li>1958: A-Netz system in Germany, 160 MHz, analog, connection set up from mobile stati...
History of Mobile Systems-2 <ul><li>1980: Cordless home phones, CT0 </li></ul><ul><li>1983: Advanced Mobile Phone system d...
History of Digital Mobile Systems-1 <ul><li>1991: fully digital &quot;digital European cordless telephone&quot;(DECT) impl...
History of Digital Mobile Systems-2 <ul><li>1991: GSM standardized </li></ul><ul><li>Now known as Global System for Mobile...
History of Digital Mobile Systems-3 <ul><li>Systems that evolved alongside AMPS in the US during the 90's were </li></ul><...
History of Digital Mobile Systems-4 <ul><li>2002: IMT-2000, 2.4 GHz band, includes a frameworks for services, network arch...
History of Digital Mobile Systems-5 <ul><li>2000: higher data rates and packet oriented transmission for GSM(HSCSD, GPRS) ...
WLAN History-1 <ul><li>1996: ETSI standardizes HIPERLAN(high performance radio local area network) </li></ul><ul><li>HIPER...
WLAN History-2 <ul><li>1999: Bluetooth, short range personal network, up to 1 Mbps </li></ul><ul><li>2002: Bluetooth appli...
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It 802 d_mobile_communicationsSomeHistory

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History of cellular and other mobile systems

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It 802 d_mobile_communicationsSomeHistory

  1. 1. IT 802D Mobile Communications Debasis Das
  2. 2. History of   Mobile Systems-1 <ul><li>1958: A-Netz system in Germany, 160 MHz, analog, connection set up from mobile station, no hand off possible </li></ul><ul><li>1979: B-Netz, 160 MHz carrier, analog, high powered transmitter & receivers in cars </li></ul><ul><li>1979: Nordic mobile telephone(NMT), 450 MHz, carrier, analog </li></ul><ul><li>1986: NMT, 900 MHz system </li></ul><ul><li>1982: pan European system planned, Groupe Speciale Mobile (GSM) group was formed, targets </li></ul><ul><li>carrier of 900 MHz, roaming throughout Europe </li></ul><ul><li>fully digital, to offer voice and data service </li></ul>
  3. 3. History of Mobile Systems-2 <ul><li>1980: Cordless home phones, CT0 </li></ul><ul><li>1983: Advanced Mobile Phone system deployed in US, Analog, 850 MHz </li></ul><ul><li>1984: Cordless phone CT1 implements in US </li></ul><ul><li>C-Netz, 450 MHz, analog. Handover between cells implemented, digital signalling (SS7), automatic localization of mobile users within a network was possible, offered additionally fax, data transmission via modem, X.25 and electronic mail </li></ul><ul><li>1987: CT2 comes along,  </li></ul>
  4. 4. History of Digital Mobile Systems-1 <ul><li>1991: fully digital &quot;digital European cordless telephone&quot;(DECT) implemented,  </li></ul><ul><li>1880-1900 MHz, range 100 to 500 meters </li></ul><ul><li>120 duplex channels could carry 1.2 Mbps data </li></ul><ul><li>voice encryption & authentication built-in </li></ul><ul><li>System supports several 10,000 users/sq. km </li></ul><ul><li>adopted by 110 countries </li></ul><ul><li>now called digital enhance communication system </li></ul>
  5. 5. History of Digital Mobile Systems-2 <ul><li>1991: GSM standardized </li></ul><ul><li>Now known as Global System for Mobile Communication </li></ul><ul><li>900 MHz carrier, 124 full duplex channels, international roaming, automatic location service, authentication, encryption on wireless link, inter operation with ISDN system, relatively high audio quality </li></ul><ul><li>Short messaging service, 160 characters, fax group 3, data services at 9.6 Kbps </li></ul><ul><li>More than 70% of service providers in 190 countries have adopted the GSM </li></ul>
  6. 6. History of Digital Mobile Systems-3 <ul><li>Systems that evolved alongside AMPS in the US during the 90's were </li></ul><ul><li>IS-88: narrowband analog AMPS, TIA 1993a </li></ul><ul><li>Is-136: digital, TDMA system, 1900 MHz, TIA 1996 </li></ul><ul><li>IS-95:  digital, CDMA system, 1900 MHz, TIA 1993b </li></ul><ul><li>  GSM for 1800 MHz, aka DCS-1800 </li></ul><ul><li>In the US the system available is known as GSM-1900 or PCS-1900 </li></ul><ul><li>1998: iridium: mobile communications through satellites,66 satellites in LEO, 1.6 GHz band, first version conbined GSM and CDMA </li></ul><ul><li>1998: Europeans agree on UMTS, the European proposal for IMT-2000 </li></ul>
  7. 7. History of Digital Mobile Systems-4 <ul><li>2002: IMT-2000, 2.4 GHz band, includes a frameworks for services, network architecture including satellite network, strategies for developing countries, requirements for the ardio interface,  spectrum considerations, security and management frameworks and different transmission technologies. </li></ul>
  8. 8. History of Digital Mobile Systems-5 <ul><li>2000: higher data rates and packet oriented transmission for GSM(HSCSD, GPRS) arrived </li></ul><ul><li>2001: 3G arrives in Japan with FOMA services(Freedom of mobile multimedia access), several field trial in Europe, CDMA2000 in Korea </li></ul>
  9. 9. WLAN History-1 <ul><li>1996: ETSI standardizes HIPERLAN(high performance radio local area network) </li></ul><ul><li>HIPERLAN1: 5.2 GHz, 23.5 Mbps,  </li></ul><ul><li>. </li></ul><ul><li>HIPERLAN4: 17 GHz, 155 Mbps </li></ul><ul><li>1997: IEEE 802.11, License free industrial, science and medical band (ISM) of 2.4 GHz and infra red bands, 2 Mbps initially then up to 10Mbps </li></ul><ul><li>1999: IEEE 802.11b, 11 Mbps, 2.4 GHz </li></ul><ul><li>WAP & iMode of Japan came about around this time </li></ul><ul><li>2000:IEEE 802.11a, 5 GHz, 54 Mbps </li></ul><ul><li>2002: IEEE 802.11g, 2.4 GHz, 54 Mbps </li></ul>
  10. 10. WLAN History-2 <ul><li>1999: Bluetooth, short range personal network, up to 1 Mbps </li></ul><ul><li>2002: Bluetooth applications started appearing such as headsets, remote controls, wireless keyboards,hot syncing, etc. </li></ul>

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