GSM network is technique which allows people to communicate each other from one place to others or from one country to others via Radio Frequency (RF).
GSM network is divided 3 main parts.
1/ Network and Switching Subsystem (NSS)
The network subsystem acts as an interface between the GSM network and the public networks, PSTN/ISDN. The main components of the NSS are MSC, HLR, VLR, AUC, and EIR..
2/ Base Station Subsystem (BSS)
The BSS consists of the base transreceiver station (BTS), base station controller (BSC) and transcoder sub-multiplexer (TCSM). The latter is sometimes physically located at the MSC. Hence the BSC also has three standardised interfaces to the fixed network, namely Abis, A and X.25.
- MS connects to BTS via Um Interface (Air interface)
- BTS connects to BSC via Abis Interface
- BSC connects to MSC via A Interface
3/ Operation and Support System (OSS)
A part to perform operation and monitoring center(OMC), it functions as monitoring alarm and configuration in GSM Network.
Frequency and Channel Number in GSM Network
GSM network is divided 3 main parts.
1/ Network and Switching Subsystem (NSS)
The network subsystem acts as an interface between the GSM network and the public networks, PSTN/ISDN. The main components of the NSS are MSC, HLR, VLR, AUC, and EIR..
2/ Base Station Subsystem (BSS)
The BSS consists of the base transreceiver station (BTS), base station controller (BSC) and transcoder sub-multiplexer (TCSM). The latter is sometimes physically located at the MSC. Hence the BSC also has three standardised interfaces to the fixed network, namely Abis, A and X.25.
- MS connects to BTS via Um Interface (Air interface)
- BTS connects to BSC via Abis Interface
- BSC connects to MSC via A Interface
3/ Operation and Support System (OSS)
A part to perform operation and monitoring center(OMC), it functions as monitoring alarm and configuration in GSM Network.
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