CELLULAR RADIO TELECOMMUNICATION SYSTEM

摘要

A radio telecommunication system, and in particular an in-building system, comprises a number of basestations connected together by a local area network (LAN) at least one of the basestations (BS) is capable of receiving a control channel transmitted by one or more of the other basestations (BS) of the telecommunication systems, from which it derives frequency reference and time base synchronisation data to enable the basestation to correct the frequency and time offset of its own transmissions with respect to the other basestatations (BS) in the system. Also connected to the LAN is a controller (PC). The controller receives transmission measurement signals from each of the basestations (BS) and processes these transmission measurement signals to select radio frequency channels on which the basestations of the system should transmit to minimise interference with an external telecommunications system. The controller (PC) also receives transmission measurement signals from the basestations (BS) that are used to determine the power at which the basestations of the telecommunications system should transmit.