Global System for Mobile Communication (GSM)

GSM (Global System for Mobile Communication) is open digital cellular technology used for transmitting voice and providing data services. GSM supports voice traffic as well as data traffic in form of CSD (Circuit switched data) or HSCSD (High speed circuit switched data). Network Architecture GSM network is logically divided in two parts Access network (AN) and Core Network (CN). Access network deals with communication of Mobile handset with the network over radio interface and Core networks deals with routing of the call within same network or to another network like PSTN. Network Architecture for GSM is hierarchical i.e. 1 BSC (Base station controller) handles multiple BTS (Base Transceiver Station), 1 MSC (Mobile-service switching centre) handles multiple BSC. Various entities and their functionality is described in following section Core Netowrk MSC (Mobile-service switching centre):MSC acts as interface between radio network and fixed network. MSC acts as exchange which performs all switching [...]

Read more...