Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (3): 325-330.DOI: 10.12068/j.issn.1005-3026.2017.03.005

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An Intelligent Fault-Tolerant QoS Routing Mechanism Based on PSO and SA Hybrid Optimization

ZHANG Qing-yi1, WANG Xing-wei2, HUANG Min3   

  1. 1. School of Computer Science & Engineering, Northeastern University, Shenyang 110169, China; 2.School of Software, Northeastern University, Shenyang 110169, China; 3. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2015-10-28 Revised:2015-10-28 Online:2017-03-15 Published:2017-03-24
  • Contact: WANG Xing-wei
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Abstract: Network is vulnerable when failures happen due to its heterogeneity, mobility and instability, at the same time reliability and user QoS(quality of service)cannot be guaranteed. Therefore fault tolerance needs to be improved to guarantee the reliability of QoS routing. For this purpose, an intelligent fault-tolerant QoS routing mechanism was proposed based on PSO(particle swarm optimization)and SA(simulated annealing). Considering the network dynamics, network model was quantitatively described by introducing knowledge of fuzzy mathematics and probability theory. The SRLG(shared risk link group)disjoint and preventive shared-path protective strategy were adopted to find backup path, which optimized end-to-end reliability, cost and QoS parameters. Simulation results indicate that the proposed mechanism has good performance on the percentage of route validity, fault-restoring ratio and resource utilization and thus is feasible and effective.

Key words: fault-tolerant routing, quality of service(QoS), shared risk link group, particle swarm optimization, simulated annealing

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