Power saving technology for the Internet has become a vital issue because of the growing energy consumption, caused by the increasing traffic demand. Thus, we have proposed a scheme to dynamically control the transmission capacity between switches in order to reduce the power consumption on the basis of the change in traffic volume. In this paper, the transmission capacity is better estimated by taking into account the history information of the amount of arriving traffic. We propose two types of schemes, which slightly differ in their use of a mixture of the history information and the latest information. Using simulation studies including an evaluation with real traffic, we show that the proposed schemes can achieve high power saving capability as well as sufficient communication quality.