Protocol to avoid noise in power line networks

This paper reviews established methods of communication using in-building power conductors with particular attention to the 100 kHz to 450 kHz frequency range. Measurements have shown that noise bursts on powerline conductors occur at regular times during the 60 Hz cycle and it was observed that transmission bit errors coincide with these noise bursts. The paper describes an adaptive transmission protocol whereby transmission is suspended during periods of high interference and then continues during quiet intervals. In an experimental implementation in a commercial office environment, throughput was measured at about 80% of the nominal modem rate.