Abstract: An apparatus and method for measuring and compensating for delay between a main base station and a remote base station interconnected by an optical cable. The main base station inserts a test pattern into an overhead part of an SDH frame to transmit the SDH frame to the remote base station, receives the SDH frame looped back by the remote base station to detect the test pattern, and measures propagation delay according to the test pattern. At least one frame alignment word (FAW) is detected at a predetermined position in the received SDH frame, and a delay error is calculated according to FAW detection information. The measured propagation delay with the delay error is compensated and produces propagation delay caused by the optical cable. A modulator/demodulator (MODEM) compensates for delay of a baseband signal to be transmitted to the remote base station.

Abstract: An apparatus for controlling data transmission/reception between a main system and a remote system of a base transceiver station (BTS) in a mobile communication system to improve reliability of data without the limitation of signal transmission distance between a main system and a remote system. The apparatus has: a time stamp generator for generating a time stamp signal indicating start of a Synchronous Transfer Mode STM) frame using a reference synchronous signal; a data former for receiving and being synchronized with the reference synchronous signal, and converting received traffic data into STM frame data; and a data transmitter for receiving and mapping the output data of the time stamp generator with a data communication channel (DCC), receiving output data of the data former, mapping the output data of the data former with a frame transmission channel, converting data mapped with the channels into an optical signal for transmission on an optical path.

Abstract: An apparatus and method for measuring and compensating for delay between a main base station and a remote base station interconnected by an optical cable. The main base station inserts a test pattern into an overhead part of an SDH frame to transmit the SDH frame to the remote base station, receives the SDH frame looped back by the remote base station to detect the test pattern, and measures propagation delay according to the test pattern. At least one frame alignment word (FAW) is detected at a predetermined position in the received SDH frame, and a delay error is calculated according to FAW detection information. The measured propagation delay with the delay error is compensated and produces propagation delay caused by the optical cable. A modulator/demodulator (MODEM) compensates for delay of a baseband signal to be transmitted to the remote base station.

Abstract: An apparatus for controlling data transmission/reception between a main system and a remote system of a base transceiver station (BTS) in a mobile communication system to improve reliability of data without the limitation of signal transmission distance between a main system and a remote system. The apparatus has: a time stamp generator for generating a time stamp signal indicating start of a Synchronous Transfer Mode STM) frame using a reference synchronous signal; a data former for receiving and being synchronized with the reference synchronous signal, and converting received traffic data into STM frame data; and a data transmitter for receiving and mapping the output data of the time stamp generator with a data communication channel (DCC), receiving output data of the data former, mapping the output data of the data former with a frame transmission channel, converting data mapped with the channels into an optical signal for transmission on an optical path.