Patent ID: 6950412

Claim:
An apparatus for controlling a base transceiver station in an international mobile telecommunication system having a plurality of the base transceiver station (BTS), at least a base station controller (BSC), a base station management (BSM) and a mobile switching center (MSC), the apparatus composing: a local routing means for interfacing the BTS with the MSC, for processing a call and a No. 7 signal for providing alarms occurred in the BSC to the BSM; a vocoding means for vocoding voice data received through the local routing means; a global routing means for interfacing among the local router, other local routers and the BSM; and a clock generating means for generating clocks necessary for controlling the BTS and the BSM, wherein the clocks are based on time and frequency clock signals received from a global positioning system (GPS), wherein the local routing means includes: (i) an OAM controlling means for generating a switching control signal, a multiplexing/demultiplexing control signal, an ATM (Asynchronous Transfer Mode) switch and protocol control signal and an ATM input/output control signal, thereby controlling a routing of ATM packet data, (ii) a switching means for interfacing the ATM packet data from the BTS in response to the ATM switching/protocol control signal, (iii) multiplexing/demultiplexing means for multiplexing ATM packet data received through the switching means based on the multiplexing/demultiplexing control signal, and for demultiplexing ATM packet data to be transmitted to the switching means, and (iv) an ATM input/output interface means for transmitting the alarm from the ATM switch and protocol controlling means to the BSC and transmitting the subscriber data to the vocoding means, in response to the ATM switch and protocol control signal.