Explain GSM architecture in detail.

Explain GSM architecture in detail.
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1 Answer

Answer :

A GSM system consists of three subsystems, the radio sub system (RSS), the network and  switching subsystem (NSS), and the operation subsystem (OSS).
1. Radio subsystem
The radio subsystem (RSS) contains all radio specific entities such as the mobile stations (MS)  and the base station subsystem (BSS). It also contains BTS and BSC.
Mobile Station
The MS comprises all user equipment (Cell Phone) and software required for communication  with a GSM network. Cell Phone contains the subscriber identity module (SIM), which stores all  user-specific data that is relevant to GSM network.
Base station subsystem (BSS): A GSM network contains many BSSs, each controlled by a base  station controller (BSC).The main function of BSS are as follows:
- Establishing connection to MS
- Coding/decoding of voice
Base transceiver station (BTS): A BTS comprises of antennas, signal processing, and amplifiers  necessary for radio transmission.
Base station controller (BSC): The BSC controls all the BTS. The main function of BSC are as  follows:
- Reserves radio frequencies.
- Handles the handover.
- Performs paging of the MS.
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