Abstract
There is a tradeoff between energy saving and performance in green
networks since energy saving is generally achieved by rerouting packets
along a substitute path with more hops to put low-load nodes to sleep or
assembling several packets before sending them to reduce the number of wake
and sleep time intervals of transmitting ports. Fiber-Wireless (FiWi) access
networks must be able to transport video traffic in an efficient way due to
the fact that video will account for the largest part of global consumer
traffic. To reduce the energy consumption of FiWi networks and guarantee the
performance of video applications, issues related to the energy-efficient
Quality-of-Service (QoS) support for video delivery in IEEE 803.3az Energy
Efficient Ethernet (EEE)-based FiWi access networks are addressed in this
paper. We extend EEE packet coalescing by considering QoS priorities and the
shared nature of FiWi networks and improve the QoS support for video
delivery by proposing a green QoS differentiated routing strategy. In
addition, to better evaluate the performance of our scheme in a real-world
setting, we carry out traffic measurements for the research on EEE-based
networks and use them in our simulations. Our results show that the proposed
scheme can effectively guarantee video delivery and reduce the energy
consumption of EEE-based FiWi access networks.
© 2011 IEEE
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