The BSS connects the Mobile Station and the NSS. It is in charge of the
transmission and reception. The BSS can be divided into two parts:
•The Base Transceiver Station (BTS) or Base Station.
The BTS corresponds to the transceivers and antennas used in each cell of the
network. A BTS is usually placed in the center of a cell. Its transmitting power
defines the size of a cell. Each BTS has between one and sixteen transceivers
depending on the density of users in the cell.
•The Base Station Controller (BSC).
The BSC controls a group of BTS and manages their radio ressources. A BSC is
principally in charge of handovers, frequency hopping, exchange functions and
control of the radio frequency power levels of the BTSs.
The Base Station Subsystem
