Technical data

www.westermo.com Theoretical and general applications 85

There are many advantages of digital transmission over analogue technology on mobile

networks, these include:

… Improved quality of the telephone connection.

… Higher transmission rates.

… Improved utilisation of the bandwidth, which brings an increase in the

number of subscribers on the network.

… New services and functions are possible such as, data, text and fax.

… Possibility of data encryption for greater security.

… Less power consumption, which gives longer standby and transmission

times on battery powered devices.

Architecture

A GSM network can be divided into three main components:

… Mobile Station (MS).

… Base Station System (BSS).

… Network Subsystem, with connections to external networks, for example,

ISDN or PSTN networks.

SIMSIM

Mobile Station Base Station Network Subsystem

BTS

BTS BSC

HLR

MSC

EIR

VLR

AuC

B A C K