Availability-aware mapping of service function chains
Availability-aware mapping of service function chains
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DOI：
10.1109/infocom.2017.8057153
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发表时间：
2017-05
期刊：
影响因子：
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通讯作者：
Jingyuan Fan;Chaowen Guan;Yangming Zhao;C. Qiao
中科院分区：
文献类型：
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作者：
Jingyuan Fan;Chaowen Guan;Yangming Zhao;C. Qiao
网络功能虚拟化（Network Function Virtualization，NFV）是一种通过服务功能链（Service Function Chain，SFC）映射的方法，将不同的网络服务部署在数据中心的虚拟化和共享平台上，从而极大地提高网络服务的有效性和灵活性的技术。然而，这种向软件定义网络功能的演进给需要高可用性的网络服务带来了新的挑战。保护网络服务的一种有效方法是使用足够的冗余。然而，通过这样做，物理资源的效率可能大大降低。为了解决这个问题，本文定义了一个最佳的可用性感知的SFC映射问题，并提出了一种新的在线算法，可以最大限度地减少物理资源的消耗，同时保证所需的高可用性在多项式时间内。仿真结果表明，该算法能显著提高SFC映射请求接受率，降低资源消耗。
Network Function Virtualization (NFV) is a promising technique to greatly improve the effectiveness and flexibility of network services through a process named Service Function Chain (SFC) mapping, with which different network services are deployed over virtualized and shared platforms in data centers. However, such an evolution towards software-defined network functions introduces new challenges to network services which require high availability. One effective way of protecting the network services is to use sufficient redundancy. By doing so, however, the efficiency of physical resources may be greatly decreased. To address such an issue, this paper defines an optimal availability-aware SFC mapping problem and presents a novel online algorithm that can minimize the physical resources consumption while guaranteeing the required high availability within a polynomial time. Simulation results show that our proposed algorithm can significantly improve SFC mapping request acceptance ratio and reduce resource consumption.