초록 ▼

In a full-duplex data communication system, the signal-to-noise ratio, error rate and occurrences of out-of-sync condition of signals transmitted on the data channel of a first transmission medium from a first station to a second station are detected by the latter and a first set of quality signals

In a full-duplex data communication system, the signal-to-noise ratio, error rate and occurrences of out-of-sync condition of signals transmitted on the data channel of a first transmission medium from a first station to a second station are detected by the latter and a first set of quality signals of the first transmission medium is generated. The signal-to-noise ratio, error rate and occurrences of out-of-sync condition of signals transmitted on the data channel of a second transmission medium in the opposite direction are likewise detected by the first station and a second set of quality signals of the second transmission medium are generated. The first set of quality signals are modulated and transmitted on a control channel of the second transmission medium from the second station and received and demodulated by the first station, which derives a speed setting command signal from the second set of quality signals as well as from the first set of quality signals represented by the demodulated signals, and the transmission speed of the first station is controlled according to the speed setting command signal. The speed setting command signal is modulated and transmitted on a control channel of the first transmission medium from the first to second station, which demodulates it and controls its transmission speed according to the demodulated speed setting command signal.

대표청구항 ▼

A data communication system comprising: a first data-channel modulator having a variable speed setting connected to one end of a first transmission medium, and a second data-channel modulator having a variable speed setting connected to the other end ot the first transmission medium; a first data-ch

A data communication system comprising: a first data-channel modulator having a variable speed setting connected to one end of a first transmission medium, and a second data-channel modulator having a variable speed setting connected to the other end ot the first transmission medium; a first data-channel demodulator having a variable speed setting connected to one end of a second transmission medium, and a second data-channel demodulator having a variable speed setting connected to the other end of said transmission medium; first signal-to-noise quality detector means for detecting a signal-to-noise ratio of said first transmission medium, and second signal-to-noise quality detector means for detecting a signal-to-noise ratio of said second transmission medium; first error rate quality detector means for detecting an error rate of said first transmission medium, and second error rate quality detector means for detecting an error rate of said second transmission medium; first out-of-sync quality detector means for detecting occurrences of out-of-sync condition on said first transmission medium, and second out-of-sync quality detector means for detecting occurrences of out-of-sync condition on said second transmission medium; control means for deriving a speed setting command signal from a first set of output signals from said first signal-to-noise ratio quality detector means, said first error rate quality detector means and said first out-of-sync quality detector means as well as from a second set of output signals, and controlling the speed settings of said first data-channel modulator and said first data-channel demodulator according to said speed setting command signal; a first control-channel modulator for modulating said speed setting command signal and transmitting the modulated command signal on said first transmission medium; a second control-channel demodulator for demodulating the modulated speed setting command signal transmitted on said first transmission medium and controlling the speed settings of said second data-channel modulator and said second data-channel demodulator according to the demodulated speed setting command signal; a second control-channel modulator for modulating output signals of said second signal-to-noise ratio quality detector means, said second error rate quality detector means and said second out-of-sync detector means and transmitting the modulated signals on said second transmission medium; and a first control-channel demodulator for demodulating signals transmitted on said second transmission medium and supplying the demodulated signals to said control means as said second set of output signals.