KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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Virtual Network Embedding based on Node Connectivity Awareness and Path Integration Evaluation

  • Zhao, Zhiyuan (College of Information and Navigation, Air Force Engineering University) ;
  • Meng, Xiangru (College of Information and Navigation, Air Force Engineering University) ;
  • Su, Yuze (College of Information and Navigation, Air Force Engineering University) ;
  • Li, Zhentao (College of Information and Navigation, Air Force Engineering University)
  • Received : 2016.12.24
  • Accepted : 2017.04.24
  • Published : 2017.07.31
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Abstract

As a main challenge in network virtualization, virtual network embedding problem is increasingly important and heuristic algorithms are of great interest. Aiming at the problems of poor correlation in node embedding and link embedding, long distance between adjacent virtual nodes and imbalance resource consumption of network components during embedding, we herein propose a two-stage virtual network embedding algorithm NA-PVNM. In node embedding stage, resource requirement and breadth first search algorithm are introduced to sort virtual nodes, and a node fitness function is developed to find the best substrate node. In link embedding stage, a path fitness function is developed to find the best path in which available bandwidth, CPU and path length are considered. Simulation results showed that the proposed algorithm could shorten link embedding distance, increase the acceptance ratio and revenue to cost ratio compared to previously reported algorithms. We also analyzed the impact of position constraint and substrate network attribute on algorithm performance, as well as the utilization of the substrate network resources during embedding via simulation. The results showed that, under the constraint of substrate resource distribution and virtual network requests, the critical factor of improving success ratio is to reduce resource consumption during embedding.

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References

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