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Resilient Virtual Network Service Provision in Network Virtualization Environments

机译：网络虚拟化环境中的弹性虚拟网络服务提供

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摘要

Network Virtualization has recently emerged to provide scalable, customized and on-demand virtual network services over a shared substrate network. How to provide VN services with resiliency guarantees against network failures has become a critical issue, meanwhile the service resource usages should be minimized under the strict constraints such as link bandwidth capability and service resiliency guarantees etc. In this paper, we present a resource allocation algorithm to balance the tradeoff between service resource consumptions and service resiliency. By exploiting a heuristic VN mapping scheme and a restoration path selection scheme based on intelligent bandwidth sharing, the algorithm simultaneously makes cost-effective usage of network resources and protects VN services against network failures. We perform evaluations and find that the algorithm is near optimal in terms of network resource usage, especially the additional restoration bandwidth cost for resiliency protection.
机译：最近出现了网络虚拟化，以通过共享的基础网络提供可扩展的，定制的和按需的虚拟网络服务。如何为VN服务提供针对网络故障的弹性保证已成为一个关键问题，同时应在诸如链路带宽能力和服务弹性保证等严格约束下将服务资源的使用降至最低。本文提出一种资源分配算法平衡服务资源消耗和服务弹性之间的权衡。通过利用基于智能带宽共享的启发式VN映射方案和恢复路径选择方案，该算法可同时以经济高效的方式利用网络资源，并保护VN服务免受网络故障的影响。我们进行了评估，发现该算法在网络资源使用方面尤其是最佳方案，尤其是用于恢复能力保护的额外恢复带宽成本。

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