基于实时拓扑属性的虚拟网络映射算法（英文）

发布时间：2018-01-01 07:21

本文关键词：基于实时拓扑属性的虚拟网络映射算法（英文）　出处：《Journal of Zhejiang University-Science C(Computers & Electronics)》2015年02期 　论文类型：期刊论文

【摘要】：研究目的:基于虚拟网络请求和底层物理网络实时拓扑属性,提出一种高效的两步式虚拟网络映射算法。创新要点:分别利用中介中心性和物理节点相关性对虚拟网络请求和底层物理网络中节点进行重要性评估,在此基础上给出一种两步式映射算法(算法1,2)。研究方法:首先给出中间中心性、接近中心性以及节点相关性计算模型,结合节点本地资源分别提出虚拟网络请求和物理网络中节点排名计算方式。当虚拟网络请求到达后,根据虚拟节点排名,将其映射到拥有足够资源的物理节点中排名最靠前的节点。节点映射完成后,使用K-th最短路径算法进行链路映射。映射过程中采用文献(Yu et al.,2008)中所使用的时间窗口模式进行接入控制。重要结论:利用节点本地资源,针对性分析虚拟网络请求和物理网络实时拓扑属性,提出两步式映射算法。该算法提高请求接受率、开销收益比的同时减少算法映射时间,取得更好的映射效果(图3-10)。
[Abstract]:Purpose: based on the virtual network request and the real time topology attribute of the underlying physical network. An efficient two-step virtual network mapping algorithm is proposed. The key points of innovation are to evaluate the importance of the nodes in the virtual network request and the underlying physical network by using the intermediary centrality and the physical node correlation respectively. On the basis of this, a two-step mapping algorithm (algorithm 1 / 2) is presented. Firstly, the calculation models of intermediate centrality, proximity centrality and node correlation are given. The virtual network request and the node rank calculation method in the physical network are proposed in combination with the local resources of the node. When the virtual network request arrives, the virtual node ranking is based on the virtual network request. Maps it to the highest ranked physical node with sufficient resources. After the node mapping is complete. K-th shortest path algorithm is used for link mapping. Important conclusion: using the local resources of nodes to analyze the virtual network requests and physical network real-time topology attributes. A two-step mapping algorithm is proposed, which improves the request acceptance rate, reduces the cost / benefit ratio while reducing the mapping time, and achieves a better mapping effect (Fig. 3-10).
【作者单位】： State
【基金】：Project supported by the National Basic Research Program(973)of China(No.2012CB315801) the National Natural Science Foundation of China(Nos.61302089 and 61300184) the Fundamental Research Funds for the Central Universities,China(No.2013RC0113)
【分类号】：TP393.02
【正文快照】： 1 IntroductionNetwork virtualization has been put forward asone of the underlying technologies for future Internet(Anderson et al.,2005;Bavier et al.,2006;Fischer etal.,2013).It aims to enable multiple virtual networksto run on a shared physical substrat

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