| 摘要 |
<p>A line terminating apparatus for terminating a communication path used for a multicarrier transmission or used for a multi-level transmission. A transmission control method for realizing that line terminating apparatus. It is an object of the invention to maintain a stable, high transmission quality and improve the transmission rate. A line terminating apparatus for terminating a line, which is intermittently subjected to interference and used for a multicarrier transmission, comprises a transmission quality monitoring means that determines an average value of the transmission quality of signals received via the line and also determines a degraded transmission quality into which the transmission quality has been degraded in accordance with the interference; and a control means that, when the difference between the average value and the degraded transmission quality exceeds a predetermined threshold value, sets a size of symbols, which are to be transmitted via carriers that realize the multicarrier transmission, with the degraded transmission quality referred to, and that, when the difference is below the predetermined threshold value, sets a size of the symbols with the average value referred to.</p> |
