基于流量优化的可靠服务功能链部署方法

doi:10.12305/j.issn.1001-506X.2021.10.38

Abstract

Abstract:

Aiming at the problem of resource cost of service function chain deployment in network function virtualization environment, a reliable service function chain deployment method based on traffic optimization is proposed. Firstly, the virtual network function is aggregated according to the traffic change of virtual link. After the virtual link with high bandwidth demand is deployed to the underlying network, its traffic becomes the internal traffic of the server. Secondly, considering the reliability, delay and topology attributes comprehensively, the multi-index decision algorithm with maximum deviation is used to evaluate the physical nodes, and the distance constraint is used to reduce the ping-pong effect of traffic. Finally, k-shortest path algorithm is used to deploy the virtual link to the physical link that meets the bandwidth demand. Simulation experiments show that this method can optimize the long-term revenue overhead ratio, mapping success rate, end-to-end delay and bandwidth overhead on the basis of ensuring the reliability of service function chain.

Key words: network function virtualization, service function chain deployment, resource cost, ping pong effect, topology and delay awareness

CLC Number:

TP393

Yong YANG, Xiangru MENG, Qiaoyan KANG, Wenwen ZHAO. Reliable service function chain deployment method based on traffic optimization[J]. Systems Engineering and Electronics, 2021, 43(10): 3017-3025.

Figures/Tables 9

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References 30

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实验参数	参数值
节点计算资源	服从[70, 80]的均匀分布
节点存储资源	服从[70, 80]的均匀分布
节点转发资源	服从[70, 80]的均匀分布
节点产生时延	服从[2, 5]的均匀分布
节点可靠性	服从[0.95, 0.98]的均匀分布
链路带宽	服从[300, 500]的均匀分布
链路时延	服从[2, 5]的均匀分布
VNF计算资源需求	服从[10, 20]的均匀分布
VNF存储资源需求	服从[10, 20]的均匀分布
VNF转发资源需求	服从[10, 20]的均匀分布
VNF带宽改变因子	服从[0.7, 1.4]的均匀分布
初始带宽需求	服从[50, 60]的均匀分布
SFC中VNF个数	服从[3, 6]的均匀分布
SFC可靠性下限	服从[0.75, 0.8]的均匀分布
SFC端到端时延上限	服从[90, 100]的均匀分布

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Reliable service function chain deployment method based on traffic optimization

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