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GSM Entities (The function of : (1)BTS (Base Transceiver Station)…
GSM Entities
The function of :
1)BTS (Base Transceiver Station)
Encoding, encrypting, multiplexing, modulating, and feeding the RF signals to the antenna
Transcoding and rate adaptation
Time and frequency synchronizing
Voice through full- or half-rate services
Decoding, decrypting, and equalizing received signals
Random access detection
Timing advances
Uplink channel measurements
2)BSC(Base Station Controller)
Control of frequency hopping
Performing traffic concentration to reduce the number of lines from the MSC
Providing an interface to the Operations and Maintenance Center for the BSS
Reallocation of frequencies among BTSs
Time and frequency synchronization
Power management
Time-delay measurements of received signals from the MS
3)MSC(Mobile Switching Center)
specific functions for paging and call forwarding
location registration and forwarding of location information
termination of SS7 (signaling system no. 7)
provision of new services (fax, data calls)
support of short message service (SMS)
generation and forwarding of accounting and billing information
mobility specific signaling
4)GMSC(Gateway MSC)
The SMS GMSC (SMS gateway MSC) is a gateway MSC that can also receive short messages.
The gateway MSC is a mobile network‟s point of contact with other networks.
SIM Card
allow users to store
1)contact information
2)messages
