BSC - The Base Station Controller

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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