Network virtualization over elastic optical networks with different protection schemes
Network virtualization over elastic optical networks with different protection schemes
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DOI：
10.1364/jocn.8.000272
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发表时间：
2016-04
期刊：
影响因子：
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通讯作者：
K. Assis;S. Peng;R. C. Almeida;H. Waldman;A. Hammad;A. F. Santos;D. Simeonidou
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文献类型：
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作者：
K. Assis;S. Peng;R. C. Almeida;H. Waldman;A. Hammad;A. F. Santos;D. Simeonidou
通过网络虚拟化，可以将物理基础设施划分为多个并行的虚拟网络以实现共享。但是，不同的传输技术或服务质量（QoS）级别可能会影响所请求的资源量以及可以在单个物理基础设施之上构建的不同虚拟实例的特性。在本文中，我们提出了一种新的混合整数线性规划（MILP）制定不同的保护方案的情况下，多个虚拟拓扑运行在一个弹性光网络。建议MILP制定使用的概念，带宽压缩，以保证最小的带宽生存的虚拟拓扑。对于每个虚拟拓扑，它都可以为受不同提交服务配置文件影响的流量实现高级别的生存性。进行了案例研究，以分析在小网络的配方的基本性质，并提出了三个算法，为较大的网络。
With network virtualization, the physical infrastructure can be partitioned into multiple parallel virtual networks for sharing purposes. However, different transport technologies or quality of service (QoS) levels may impact both the requested amount of resources and the characteristics of different virtual instances that can be built on top of a single physical infrastructure. In this paper we propose a novel mixed integer linear programming (MILP) formulation for different schemes of protection in scenarios where multiple virtual topologies run over an elastic optical network. The proposed MILP formulation uses the concept of bandwidth squeezing to guarantee a minimum bandwidth for surviving virtual topologies. It achieves a high level of survivability for traffic that is subject to a different committed service profile for each virtual topology. Case studies are carried out in order to analyze the basic properties of the formulation in small networks, and three heuristics are proposed for larger networks.