Until very recently, energy efficiency has received little attention in many wired communications environments. For example, in most current Ethernet standards the transmitter and receiver operate at full power even when no data is being sent. However, new upcoming energy-aware standards, such as Energy Efficient Ethernet (EEE), are addressing this issue by introducing a low power mode for idle link intervals. The future EEE standard defines the procedure to enter and exit the low power mode. With EEE the actual energy savings will depend on the amount of traffic and on the timing of the frame arrivals. In this paper the performance of EEE in terms of energy saving is evaluated. The results show that although EEE improves the energy efficiency, there is still potential for substantial further energy savings as in many cases most of the energy is wasted in waking up and sleeping the link.
[1]
Michalis Faloutsos,et al.
A nonstationary Poisson view of Internet traffic
,
2004,
IEEE INFOCOM 2004.
[2]
Suresh Singh,et al.
Greening of the internet
,
2003,
SIGCOMM '03.
[3]
Kenneth J. Christensen,et al.
Reducing the Energy Consumption of Ethernet with Adaptive Link Rate (ALR)
,
2008,
IEEE Transactions on Computers.
[4]
Luiz André Barroso,et al.
The Case for Energy-Proportional Computing
,
2007,
Computer.