| 摘要 |
PROBLEM TO BE SOLVED: To provide a power-line carrier communication device capable of automatically setting an optimum communication path by easily discriminating the new installation of a terminal and the change of transmission characteristics, when the terminal is installed anew and when transmission characteristics are changed by the alteration or the like of a power load. SOLUTION: The power-line carrier communication device has a repeater 10 and a plurality of the terminals 11 to 15 placed under the repeater 10 and having a function relaying the communications of other terminals. The terminals 11 to 15 have communication-path quality decision means deciding the qualities of communication paths, and a communication-path setting means for setting the optimum communication path by selecting the relaying terminal on the basis of a decision by the communication-path quality decision means. When the terminal 15 is fitted anew, the communication-path quality decision means and the communication-path setting means for the terminal 15 automatically set the communication path having the highest percentage of a communication success as the optimum communication path. When the percentage of the communication success is lower than a threshold value, the optimum communication path is searched anew and updated. COPYRIGHT: (C)2007,JPO&INPIT
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