On the Tradeoff Between Energy Saving and QoS Support for Video Delivery in EEE-Based FiWi Networks Using Real-World Traffic Traces
On the Tradeoff Between Energy Saving and QoS Support for Video Delivery in EEE-Based FiWi Networks Using Real-World Traffic Traces
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DOI：
10.1109/jlt.2011.2160713
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发表时间：
2011-06
影响因子：
4.7
通讯作者：
Xin Liu;N. Ghazisaidi;L. Ivănescu;R. Kang;M. Maier
中科院分区：
文献类型：
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作者：
Xin Liu;N. Ghazisaidi;L. Ivănescu;R. Kang;M. Maier
在绿色网络中存在节能和性能之间的权衡，因为节能通常通过沿着具有更多跳数的替代路径重新路由分组以使低负载节点休眠或在发送分组之前组装几个分组以减少发送端口的唤醒和休眠时间间隔的数量来实现。光纤无线（FiWi）接入网络必须能够以高效的方式传输视频流量，因为视频将占全球消费者流量的最大部分。为了降低FiWi网络的能耗，保证视频应用的性能，本文研究了基于IEEE 803.3az节能以太网（Energy Efficient Ethernet，EEE）的FiWi接入网络中视频传输的节能服务质量（Quality-of-Service，QoS）支持问题。我们扩展的QoS优先级和FiWi网络的共享性质，并提出了一个绿色QoS差异化路由策略，提高视频传输的QoS支持，通过考虑数据包合并。此外，为了更好地评估我们的方案在现实世界中的性能，我们进行了基于EE的网络的研究流量测量，并在我们的模拟中使用它们。实验结果表明，该方案能够有效地保证视频传输，降低基于IEEE的FiWi接入网络的能耗。
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.