GSM/2G Architecture
The GSM network can be broadly divided into- Mobile Station(MS) Base Station Sub-System(BSS) Network Switching Sub-System(NSS) Operation Support Sub-System(OSS) GSM/2G Architecture Mobile Station : ME(Mobile Equipment) :Hardware used by subscriber containing IMEI(International Mobile Equipment Identity). SIM(Subscriber Identity Module) :Detachable smart card containing IMSI(International Mobile Subscriber Identity). 2. Base Station Subsystem : BTS(Base Transceiver Station) :Sends & Receives signals from MS. Also does Encoding, Multiplexing, Encryption, Modulation, ..etc. BSC(Base Station Controller) :Controls group of BTS, Allocation of radio channels, Handover from one BTS to another. 3. Network Switching Subsystem : MSC(Mobile Switching Centre) :Performs call routing, call setup & call switching. Communicates with other NSS component like HLR ,VLR, AUC &EIR, Management of...