In this paper, we focus on energy-efficient network planning (including traffic provisioning) along with optimal placement of virtualized elastic regenerators (VERs) for IP-over-elastic optical networks based on a static traffic profile, using a mixed integer linear programming-based optimization model. The proposed model judiciously exploits flexibility of IP core routers, sliceable bandwidth variable transponders (SBVTs) and VERs to accommodate the traffic demands with the minimum power consumption (PC). Optical layer traffic grooming allows to simultaneously originate/terminate multiple lightpaths of different capacities, data slots and maximum transparent reach by a single SBVT. The proposed model also allows to use all functionalities of VER, such as simultaneous regeneration, distance-adaptive transmission option selection, frequency slot merging to be used concurrently for the given static traffic profile. In addition, the proposed model includes lifetime awareness of Erbium-doped fiber amplifier (EDFA) to reduce EDFA failure and associated repairing cost in long run. Using the proposed model, we enhance the average EDFA lifetime by restricting average EDFA occupancy, represented by the ratio of the (average) number of lightpaths being amplified in an EDFA and the maximum possible number of lightpaths that can be amplified in it, even though in the process, the overall PC in network may increase, with reference to the scenario with no EDFA occupancy restriction. The variation in PC and average EDFA lifetime for different permissible (user-defined) average EDFA occupancy are studied. We exhaustively study performance of the model under different network conditions.

在本文中，我们将重点放在高能效的网络规划（包括流量配置）以及基于静态流量配置文件的IP-over-Elastic光网络的虚拟化弹性再生器（VERs）的最佳布置，使用混合整数线性规划，基于优化的模型。所提出的模型明智地利用了IP核心路由器，可分割带宽可变应答器（SBVT）和VER的灵活性，以最小的功耗（PC）满足流量需求。光层业务量疏导允许通过单个SBVT同时发起/终止不同容量，数据时隙和最大透明范围的多个光路。提出的模型还允许使用VER的所有功能，例如同步再生，距离自适应传输选项选择，频槽合并以同时使用给定的静态流量配置文件。另外，所提出的模型包括掺lifetime光纤放大器（EDFA）的使用寿命感知，以减少EDFA的故障以及长期的相关维修成本。使用提出的模型，我们通过限制平均EDFA占用率来提高平均EDFA寿命，以EDFA中被放大的（平均）光路数与可以放大的最大光路数之比来表示，即使在此过程中，参考没有EDFA占用限制的情况，网络中的整体PC可能会增加。研究了不同许可（用户定义）平均EDFA占用率下PC和平均EDFA寿命的变化。我们详尽地研究了在不同网络条件下模型的性能。