基于资源效用最大化的虚拟网络功能备份方法

发布时间：2018-10-11 13:49

【摘要】：针对网络功能虚拟化环境下组成服务功能链的虚拟网络功能故障所引起的网络服务故障问题,提出一种最大化资源效用的虚拟服务功能备份方法来提高网络可靠性。首先,对虚拟服务功能备份问题进行详细分析并建立了可靠性评估模型,提出了改进的备份机制,并证明了该机制与其他机制相比的优势;其次,对全网络设计了全局备份算法和备份选择策略来对相应的虚拟网络功能选取备份直到满足可靠性需求。仿真实验结果表明,与GREP方法、联合备份机制加上随机选择策略(JP+random selection)及双重共享式备份机制加上随机选择策略(DSP+random selection)相比,该方法在可靠性和资源利用率上取得了优异的性能,特别是服务功能链请求接受率提高18.8%~25%,资源效用利用率提高15%~20%。实验结果表明该方法能较为有效地利用资源来提升网络可靠性。
[Abstract]:In order to solve the problem of network service failure caused by the virtual network function failure which constitutes the service function chain in the virtual network function virtualization environment, a virtual service function backup method which maximizes the resource utility is proposed to improve the network reliability. Firstly, the problem of virtual service function backup is analyzed in detail, and the reliability evaluation model is established. An improved backup mechanism is proposed, and the advantages of this mechanism compared with other mechanisms are proved. The global backup algorithm and backup selection strategy are designed for the whole network to select the backup for the corresponding virtual network function until the reliability requirement is satisfied. The simulation results show that compared with the GREP method, the joint backup mechanism and the random selection strategy (JP random selection) and the dual shared backup mechanism plus the random selection strategy (DSP random selection) are compared. The method achieves excellent performance in terms of reliability and resource utilization, especially the request acceptance rate of service function chain is increased by 18.8%, and the utilization rate of resource utility is increased by 15% 20%. Experimental results show that this method can effectively utilize resources to improve network reliability.
【作者单位】：国家数字交换系统工程技术研究中心第三研究部;中华人民共和国科学技术部信息中心;
【基金】：国家973计划项目(2012CB315901) 国家863计划项目(2015AA016102)~~
【分类号】：TP393.0

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