gsm architecture

GSM stands for Global System for Mobile Communication.

– 1991 first GSM network launched

– 1992 european GSM network turn commercial

– 1994 data transmission capabilities launched


– hierarchically structured

– consists of one administrative region, which is assigned to a MSC.

– Each administrative region is made up of at least one location area (LA). LA is also called the visited area.

– An LA consists of several cell groups

– Each cell group is assigned to a base station controller(BSC).

– cells of one BSC may belong to different LAs.

GSM Network:

consists of:

– Mobile station (MS)

– Base station subsystem (BSS)

– Network and switching subsystem (NSS)

– Operation and support subsystem (OSS)