異種PLCシステム間における異種システム検出方式についての一検討

摘要

近年，FTTHやADSLの急成長により屋内においても高rn速ネットワークを構築したいという要求が高まっている。rn電力線通信（PLC: Power Line Communication）は屋内高rn速ネットワークを実現するためのひとつの手段である。電rn力線通信においてはこれまで様々な通信方式が用いられてrnきた。%Coexistence method when various different type PLC (Power Line Communication) systems exist on the same electric power line is not so considered though these systems have already been used. In this paper, we will propose the different system detection method in the environment like above"mentioned and a common wideband control signal with the robustness to be able to communicate each other even in some harsh environments of the electric power line. Therefore a plural of different type systems can coexist even when those systems are used on the same electric power line because of using the common wideband signal for the proposed different system detection method. For example, power line channel is divided into a control region and a data transmission region with the synchronized timing of AC zero crossing in the proposed method. The proposed common wideband signal is used in order to allocate each communication band for each different type system in the control region. In the computer simulation, several carrier detection probabilities were calculated in AWGN (Added White Gaussian Noise) channel and the 80 simulated channels based on the channel data which were measured in the U.S. These results show that the proposed control signal for the different system detection method is robust enough to use in the power line.