Radio Subsystem
n The Radio Subsystem (RSS) comprises the cellular mobile
network up to the switching centers
n Components
Base Station Subsystem (BSS):
n Base Transceiver Station (BTS): radio components including sender,
receiver, antenna - if directed antennas are used one BTS can cover
several cells
n Base Station Controller (BSC): switching between BTSs, controlling
BTSs, managing of network resources, mapping of radio channels
(Um) onto terrestrial channels (A interface)
n BSS = BSC + sum(BTS) + interconnection
Mobile Stations (MS)