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Chapter 16
Wireless WANs: Cellular Telephone
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16-1 CELLULAR TELEPHONY16-1 CELLULAR TELEPHONY
Cellular telephonyCellular telephony is designed to provide communicis designed to provide communications between two moving units, called mobile statiations between two moving units, called mobile stations (MSs), or between one mobile unit and one stations (MSs), or between one mobile unit and one stationary unit, often called a land unit.onary unit, often called a land unit.
Frequency-Reuse PrincipleTransmittingReceivingRoamingFirst GenerationSecond GenerationThird Generation
Topics discussed in this section:Topics discussed in this section:
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Cellular SystemCellular System
A cellular service area is divided into cells.
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Frequency Reuse PatternFrequency Reuse Pattern
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First GenerationFirst Generation
AMPS (Advanced Mobile Phone System) is an analog c
ellular phone system using FDMA
operating in the ISM 800 Mhz
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AMPS reverse communication bandAMPS reverse communication band
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Second-generation cellular phone systemsSecond-generation cellular phone systems
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D-AMPSD-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.
A second-generation cellular phone system that is a digital version of AMPS
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GSMGSM
Global System for Mobile Communication (GSM) is a
second-generation cellular phone system used in
Europe
bands
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GSM (2)GSM (2)
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IS-95IS-95 Interim Standard 95 is a second-generation cellular
phone system based on CDMA and DSSS
IS-95 forward transmission
ESN : electronic serial number
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IS-95 reverse transmissionIS-95 reverse transmission
IS-95 is a digital cellular phone system using CDMA/DSSS and FDMA.
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PCSPCS
Using any second-generation Technology (GSM, IS-136
, IS-95)
Using 1900-Mhz. Higher freqs have a shorter range tha
n lower ones (smaller cells)
Providing SMS service & Internet access
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Third GenerationThird 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
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Questions !Questions !
