Dynamic transmission control to save power considering communication quality

The rapid increase of power consumption due to Internet traffic growth has made the reduction of power used by network equipment a vital issue. We earlier proposed a dynamic transmission capacity control scheme to reduce power consumption on the basis of changes in traffic volume. However, that scheme does not have a function to control the power-saving performance according to the required transmission quality. We propose a new scheme here that does consider the required connection quality. In this scheme, the required transmission capacity is determined in a way that satisfies a predetermined tolerance delay at a switch. Using simulation studies, including an evaluation with real traffic, we show that the proposed scheme enables efficient power saving without impairing the required transmission quality.