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| Hierarchical Coordination Strategy for vEPC Virtual Network Embedding Based on Subgraph Isomorphism |
| LIU Caixia LI Lingshu TANG Hongbo WANG Xiaolei LU Ganqiang |
(National Digital Switching System Engineering and Technological R&D Center, Zhengzhou 450002, China)
(National Engineering Laboratory for Mobile Network Security, Beijing 100876, China) |
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Abstract In 5G and the future mobile communication network, resource management and scheduling are the key issues to achieve efficient service deployment of virtual Evolved Packet Core (vEPC) nerwork. Service deployment in vEPC is based on Service Function Chain (SFC), in which signaling streams and forwarding streams have a big difference. On account of traffic differentiation of mobile network, the proposed model decouples the control layer and transfer layer of SFC. Different layers can make expansion and contraction independently to achieve accurate resources on-demand slice. Utilizing graph similarity theory, a virtual network embedding strategy called VF2-H is put forward in accordance with subgraph isomorphism. Firstly, candidate substrate subnet is preliminary selected on the basis of global resources capacity. Secondly, pruning condition is formulated based on the graph characteristics. Finally, collaborative search strategy is designed according to the characters of vEPC mapping. The simulation results validate the performance of the proposed algorithm in request accepting rate and long-term revenue-to-cost rate.
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Received: 16 June 2016
Published: 09 February 2017
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| Fund: The National 863 Program of China (2014AA01A701), The National Natural Science Foundation of China (61521003), The Ministry of Science and Technology Support Plan (2014BAH30B01) |
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Corresponding Authors:
LI Lingshu
E-mail: llsjdknjr@sjtu.edu.cn
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