부산대학교 도서관

The power consumption of network devices will continue to increase due to the increase in transmission speed and reach 97 GW by 2020. This paper introduces urgently needed network power reduction methods. First, the paper focuses on the optical access network architectures that use active devices such as high-speed optical switches or variable wavelength lasers to achieve significant energy savings. These new architectures are expected to dramatically reduce the Optical Network Unit (ONU)’s power consumption by introducing an effective sleep mode. Second, this paper introduces an extremely energy efficient future-Internet architecture that uses a large optical aggregation network. It combines the centralized Service Cloud with the Cloud Router and application servers and the Optical Aggregation Network. The optical aggregation network can be realized with just simple optical circuit switches, wavelength-converters, and wavelength-multiplexers/demultiplexers; the complicated layer-3 function is realized only at the center Cloud Router. The optical aggregation network realizes a network structure well suited to today’s traffic centralization. According to our evaluation, total network power consumption can be reduced to just 1/1000 compare to the electrical based network architecture.