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首页> 外文期刊>Annales des Telecommunications >Power reduction strategies with differentiated quality of protection in IP-over-WDM networks
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Power reduction strategies with differentiated quality of protection in IP-over-WDM networks

机译：WDM IP网络中具有不同保护质量的功率降低策略

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AbstractThis work considers two important aspects of modern communication networks, network survivability, and energy efficiency. Survivability is a design requirement to provide failure recovery against network outages such as fiber cuts. To ensure survivability, traditionally, spare network (i.e.,backup) resources are reserved in case of failures of primary (i.e.,working) network resources. On the other hand, energy efficiency is required to cope with the continuous growth of the Internet traffic. Backup resources increase the energy consumption, especially if constantly powered-on. Hence, a trade-off between energy efficiency and network resiliency arises. To increase transport capacity and reduce energy consumption, wavelength division multiplexed (WDM) networks are adopted as the most practical solution for data transport in core networks, which are the focus of our work. In WDM networks, different levels of protection (i.e., dedicated, shared) can be implemented for different traffic demands, and different protection levels are characterized by different power consumptions. We consider a differentiated quality of protection (Diff-QoP) scheme where different levels of protection are provided. In this context, we investigate on two different power-reduction strategies to be used in protected WDM networks: (i) setting backup devices into low-power modes (sleep mode) and (ii) adapting the devices (i.e., transmitting/receiving equipment) usage to hourly traffic variations. We present exact modeling through Integer Linear Program (ILP) of the three scenarios and a provisioning algorithm to solve the problem of power minimized design of resilient optical core networks, under static and dynamic traffic conditions. We evaluate the performance of the proposed algorithm under static traffic conditions by comparing the obtained results with the optimal solution, in absence of traffic grooming. We show that the proposed heuristic reduces the computational time by three orders of magnitude with an optimality gap ranging from 8.88 up to 23.88%. Furthermore, we include traffic grooming and solve the problem under dynamic traffic conditions. Our findings show that enabling sleep mode (SM) for backup devices can help reduce total power consumption up to 20 and up to 38% when considering with Diff-QoP. Finally, adapting the number of transmitting/receiving devices to actual traffic needs guarantees power savings up to 80%, especially during off-peak hours.
机译： Abstract 这项工作考虑了现代通信网络的两个重要方面，即网络生存能力和能源效率。生存能力是一项设计要求，可针对光纤中断等网络中断提供故障恢复。为了确保可生存性，传统上，在主服务器（即，工作）发生故​​障的情况下，保留备用网络（即，备份）资源。 ）网络资源。另一方面，需要能源效率来应对互联网流量的持续增长。备用资源会增加能耗，尤其是在持续通电的情况下。因此，出现了能量效率和网络弹性之间的权衡。为了增加传输容量并减少能耗，波分复用（WDM）网络被用作核心网络中数据传输的最实用解决方案，这是我们工作的重点。在WDM网络中，可以针对不同的流量需求实现不同的保护级别（即专用，共享），并且不同的保护级别具有不同的功耗。我们考虑提供不同级别保护的差异化保护质量（Diff-QoP）方案。在这种情况下，我们研究了可在受保护的WDM网络中使用的两种不同的节能策略：（i）将备用设备设置为低功耗模式（休眠模式）和（ ii）使设备（即发送/接收设备）的使用适应每小时的流量变化。我们通过三种情况的整数线性规划（ILP）和配置算法提供精确的建模，以解决静态和动态流量情况下弹性光核心网络的功耗最小化设计问题。通过在不进行流量疏导的情况下，通过将获得的结果与最佳解决方案进行比较，我们评估了该算法在静态流量情况下的性能。我们表明，所提出的启发式算法将计算时间减少了三个数量级，最佳差距从8.88到23.88％。此外，我们还包括交通疏导，并在动态交通状况下解决问题。我们的发现表明，在考虑使用Diff-QoP时，为备份设备启用睡眠模式（SM）可以帮助将总功耗降低多达20％和38％。最后，根据实际流量需求调整发送/接收设备的数量可确保节省多达80％的电量，尤其是在非高峰时段。

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