The increase in energy cost and the need to reduce the global greenhouse gas emission to protect our environment have stimulated the investigation of new innovative techniques for the energy consumption reduction in telecommunication networks. Some studies show that ICT is today responsible for a fraction of the world energy consumption of about 4%, and this percentage is expected to double in ...

In this paper, we propose a novel power saving scheme for relay nodes, equipped with multiple wireless network interface cards (WNICs), in IEEE 802.11 infrastructure networks. While most of recent studies have focused on power saving of end stations, the power saving of relay nodes can become even more critical when the relay nodes operate on battery power. When a relay node is equipped with mu...

As energy has become one of the key operating costs in running a data center and power waste commonly exists, it is essential to reduce energy inefficiency inside data centers. In this paper, we develop an innovative framework, called PowerTracer, for diagnosing energy inefficiency and saving power. Inside the framework, we first present a resource tracing method based on request tracing in mul...

This paper proposes a power saving mechanism with variable sleep period to reduce the power consumed by optical network units (ONUs) in passive optical network (PON) systems. In the PON systems based on time division multiplexing (TDM), sleep and periodic wake-up (SPW) control is an effective ONU power saving technique. However, the effectiveness of SPW control is fully realized only if the sle...