Abstract
Network virtualization is recognized as an effective way to overcome the ossification of the Internet. However, the virtual network mapping problem (VNMP) is a critical challenge, focusing on how to map the virtual networks to the substrate network with efficient utilization of infrastructure resources. The problem can be divided into two phases: node mapping phase and link mapping phase. In the node mapping phase, the existing algorithms usually map those virtual nodes with a complete greedy strategy, without considering the topology among these virtual nodes, resulting in too long substrate paths (with multiple hops). Addressing this problem, we propose a topology awareness mapping algorithm, which considers the topology among these virtual nodes. In the link mapping phase, the new algorithm adopts the k-shortest path algorithm. Simulation results show that the new algorithm greatly increases the long-term average revenue, the acceptance ratio, and the long-term revenue-to-cost ratio (R/C).
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Project supported by the National Basic Research Program (973) of China (No. 2011CB302601), the National Natural Science Foundation of China (No. 90818028), and the National High-Tech R&D Program (863) of China (No. 2007AA010301)
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Li, Xl., Wang, Hm., Guo, Cg. et al. Topology awareness algorithm for virtual network mapping. J. Zhejiang Univ. - Sci. C 13, 178–186 (2012). https://doi.org/10.1631/jzus.C1100282
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DOI: https://doi.org/10.1631/jzus.C1100282
Key words
- Network virtualization
- Ossification
- Virtual network (VN) mapping
- Substrate network (SN)
- Topology awareness
- Acceptance ratio