V3-Razr Repair Manual

GSM, Basic Cellular System

MSC

BSC

BTS

BTSBTS

PSTN

Area divided up into Cells each with its own Base Transceiver station (BTS) which operates on its own set of frequencies

The BTS are controlled by their own BSC (Base station controller) which can control multiple BTS

The BSCis connected to the MSC (usually by land line) so the digital over air connection is from the Mobile to the BTS, the link from the BTS to the BSC can also be by land line.

MSC : Mobile Switching Centre acts as the interface to the PSTN.

GSM, Basic Cellular System

1

1

 

2

 

3 Cell repeat pattern

3

3

 

1

 

Only possible in GSM due to

2

2

higher cross channel interference

 

 

tolerances

3

3 cell repeat: possible in GSM due to higher tolerance to cross channel interference. digital timing specs etc. Other patterns apply,

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Document –ED05020 rev.1.2

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Motorola KS-042050-V1.2 manual GSM, Basic Cellular System

KS-042050-V1.2 specifications

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