Virtual optical network mapping and core allocation in elastic optical networks using multi-core fibers
Virtual optical network mapping and core allocation in elastic optical networks using multi-core fibers
复制标题
使用多芯光纤的弹性光网络中的虚拟光网络映射和核心分配
DOI：
10.1016/j.optcom.2017.05.065
复制
发表时间：
2017
影响因子：
2.4
通讯作者：
Wang Xiaoli
中科院分区：
文献类型：
--
作者：
Xuan Hejun;Wang Yuping;Xu Zhanqi;Hao Shanshan;Wang Xiaoli
虚拟化技术通过允许虚拟光网络共享物理网络的资源，可以极大地提高网络的效率。然而，它将面临一些挑战，例如寻找虚拟节点映射、虚拟链路映射和频谱分配的有效策略。当物理弹性光网络使用多芯光纤时，这就更加复杂和具有挑战性。为了应对这些挑战，我们建立了一个约束优化模型来确定光网络映射、核心分配和频谱分配的最佳方案。为了有效地求解模型，设计了定制的编码方案、交叉和变异算子。在此基础上，提出一种高效的遗传算法来获得虚拟节点映射、虚拟链路映射、核心分配的最优方案。在三个广泛使用的网络上进行了仿真实验，实验结果表明了所提模型和算法的有效性。
Virtualization technology can greatly improve the efficiency of the networks by allowing the virtual optical networks to share the resources of the physical networks. However, it will face some challenges, such as finding the efficient strategies for virtual nodes mapping, virtual links mapping and spectrum assignment. It is even more complex and challenging when the physical elastic optical networks using multi-core fibers. To tackle these challenges, we establish a constrained optimization model to determine the optimal schemes of optical network mapping, core allocation and spectrum assignment. To solve the model efficiently, tailor-made encoding scheme, crossover and mutation operators are designed. Based on these, an efficient genetic algorithm is proposed to obtain the optimal schemes of the virtual nodes mapping, virtual links mapping, core allocation. The simulation experiments are conducted on three widely used networks, and the experimental results show the effectiveness of the proposed model and algorithm.