The BSC manages
the radio resources for one or more BTSs. It handles radio channel setup,
frequency hopping, and handovers. The BSC is the connection between the mobile
and the MSC. The BSC also translates the 13 Kbps voice channel used over the
radio link to the standard 64 Kbps channel used by the Public Switched
Telephone Network (PSDN) or ISDN.
It assigns and
releases frequencies and time slots for the MS. The BSC also handles intercell
handover. It controls the power transmission of the BSS and MS in its area. The
function of the BSC is to allocate the necessary time slots between the BTS and
the MSC. It is a switching device that handles the radio resources. Additional
functions include:
·
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
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