| 摘要 |
PURPOSE: A control station device of an IMT-2000 network is provided to receive many base stations in a control station, which is connected with an ATM(Asynchronous Transfer Mode) exchange according to a network type by an ATM user-internetwork or an ATM internetwork interfacing standard and performs a handover function, so as to increase efficiency of a system assembly. CONSTITUTION: An ATM(Asynchronous Transfer Mode) router(210) performs routing functions relating to various traffic and control data between each circuit(230-290). A control station controller(220) transceives control data as an ATM adaptation layer(AAL)5 type with base stations through the ATM router(210) and base station interfacing circuits(250-280), and transceives control data with an exchange station through the ATM router(210) and an exchange station interfacing circuit(230), then transceives control data with each circuit(230-290) through the ATM router(210) to control a control station. The exchange station interfacing circuit(230) receives the control data from the control station controller(220) through the ATM router(210) to perform an interfacing function with the exchange station, and transceives traffic data with a vocoder selector circuit(240). The vocoder selector circuit(240) receives the control data from the control station controller(220) to perform a selector function for a voice source coding and a handover relating to the traffic data, and transceives the traffic data with the base station interfacing circuits(250-280). The base station interfacing circuits(250-280) perform transceiving functions for the traffic data and the control data with the base stations, and transmit the control data to the control station controller(220), then transmit the traffic data to the vocoder selector circuit(240). An operation and maintenance(OM) device(290) collects OM information from each circuit(210-280) to process the OM information, and transmits the OM information to the control station controller(220) to perform a function relating to an OM.
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