| 摘要 |
The fractional E1 link device between a base station and a base station controller, in a link interface between the base station and the base station controller for a mobile communication system, includes: a clock converter for receiving a frame sync clock and a system clock, and converting the system clock to a clock corresponding to the number of subscribers; a processor in synchronism with the output clock of the clock converter, for interfacing transmission/reception data of the base station; a framer/transceiver in synchronism with the frame sync clock and the system clock, for framing the output data of the processor to specific time slots in conformity with a fractional E1 link, and transmitting data received on the fractional E1 link to the processor; and a multiplexer/demultiplexer for multiplexing data received from a different base station from that of the framer/transceiver, transmitting the multiplexed data on a E1/T1 link, demultiplexing data received on the E1/T1 link, and transmitting the demultiplexed data to the framer/transceiver of each base station, thereby allowing the system to use necessary E1/T1 channels only.
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