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Evolution of Cellular Telephony: From First to Third Generation Systems

Explore the advancements in cellular telephony from analog AMPS to digital D-AMPS, GSM, IS-95, and beyond with third-generation technology. Learn about frequency reuse, roaming, cellular systems, and more in this informative guide.

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Evolution of Cellular Telephony: From First to Third Generation Systems

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  1. Chapter 16 Wireless WANs: Cellular Telephone

  2. 16-1 CELLULAR TELEPHONY Cellular telephonyis designed to provide communications between two moving units, called mobile stations (MSs), or between one mobile unit and one stationary unit, often called a land unit. Topics discussed in this section: Frequency-Reuse PrincipleTransmitting Receiving Roaming First Generation Second Generation Third Generation

  3. Cellular System • A cellular service area is divided into cells.

  4. Frequency Reuse Pattern

  5. First Generation • AMPS (Advanced Mobile Phone System) is an analog cellular phone system using FDMA • operating in the ISM 800 Mhz

  6. AMPS reverse communication band

  7. Second-generation cellular phone systems

  8. D-AMPS • A second-generation cellular phone system that is a digital version of AMPS • D-AMPS, or IS-136, is a digital cellular phone system using TDMA and FDMA. • D-AMPS, or IS-136, is a digital cellular phone system using TDMA and FDMA.

  9. GSM • Global System for Mobile Communication (GSM) is a second-generation cellular phone system used in Europe • bands

  10. GSM (2)

  11. IS-95 • Interim Standard 95 is a second-generation cellular phone system based on CDMA and DSSS • IS-95 forward transmission ESN : electronic serial number

  12. IS-95 reverse transmission • IS-95 is a digital cellular phone system using CDMA/DSSS and FDMA.

  13. PCS • Using any second-generation Technology (GSM, IS-136, IS-95) • Using 1900-Mhz. Higher freqs have a shorter range than lower ones (smaller cells) • Providing SMS service & Internet access

  14. Third Generation • The main goal of third-generation cellular telephony is to provide universal personal communication. • Internet Mobile Communication for year 2000 (IMT-2000) • IMT-2000 radio interfaces

  15. Questions !

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