Mobile networks

A mobile network is composed by the following parts:

• Mobile Station (MS)
• The base stations subsystems (BSS)
• The network and switcing subsystem (NSS)
• The operations and support subsystem (OSS)

Mobile Station (MS) is composed by

• the mobile equipment (Ex: phone)
• the SIM (Subscriber identity Module) card that uniquely identified the card by the IMSI (International Mobile Subscriber Identity).

The base station subsystem is componed by

• base station (BTS) - it defines a cell in the network
• base station controller (BSC) - controls a group of BTSs