| 马雪芬.基于反馈裁决机制的无线传感网节点失效自愈修复[J].电子测量与仪器学报,2020,34(2):172-179 |
| 基于反馈裁决机制的无线传感网节点失效自愈修复 |
| Node failure self healing in wireless sensor networks based on feedback decision mechanism |
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| DOI： |
| 中文关键词: WSN 反馈裁决；节点自愈修复；拓扑变动；流量传递；流量重定向；备用修复节点 |
| 英文关键词:WSN feedback decision node self healing repair topology change traffic transfer traffic redirection |
| 基金项目:湖北省自然科学基金项目(2017CKB893)、荆门市科技局科研项目(YDKY2016027)、荆楚理工学院科研项目(YB201701)资助 |
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| 中文摘要: |
| 为解决移动条件下无线传感网节点失效时所导致的节点自愈困难，网络拓扑变动较大以及数据传输性能受限等不足，提出了一种基于反馈裁决机制的无线传感网节点失效自愈修复算法。首先，依据网络节点同一性及传输链路交叉特性，通过流量分析来构建节点失效裁决方法，通过排除失效节点的同级割点，避免割点对网络拓扑造成的分离影响，显著降低节点失效误判现象；再结合初级节点与次级节点具有的流量传递特性，设计节点失效评估机制，通过割点裁决与次级节点自愈重构，改善自愈过程中存在的拓扑变动，有效规避节点失效过程中存在的流量受限；随后，考虑到备用修复节点选取过程存在的节点自愈困难，结合割点可对网络拓扑进行切割的特性，定义备用修复节点优化选取准则，采用流量反馈机制来优化备用修复节点的选取，提高网络流量重定向能力，降低修复失败的概率。实验测试结果表明，与基于时变负载的复杂网络级联故障负荷再分配策略（TVL LRS），网络级联故障自愈算法（PFO）相比，所提算法具有更低的节点自愈总数和节点拓扑移动距离，以及更高的网络出口带宽。 |
| 英文摘要: |
| In order to solve the problems of node self healing when node failure occurs in mobile wireless sensor networks, such as large changes in network topology and limited data transmission performance, a self healing scheme based on feedback decision mechanism for wireless sensor networks is proposed. Firstly, according to the identity of network nodes and the cross characteristics of transmission links, with eliminating the same level cut points of failure nodes, the separation effect of cut points on network topology is avoided, the node failure decision model is constructed by traffic analysis, which can significantly reduce the phenomenon of node failure misjudgment. Secondly, based on node failure decision model, combining the traffic transfer characteristics of primary and secondary nodes, the node failure evaluation party is designed. In this case, through cut point decision and secondary node self healing reconstruction, the topological changes in the process of self healing are improved, and the flow limitation in the process of node failure is effectively avoided. Then, considering the difficulty of node self healing in the process of selecting standby repair nodes, an optimal selection scheme is constructed based on the characteristics of network topological cut point. The flow feedback mechanism is used to optimize the selection of standby repair nodes and reduce the risk of repair failure. The experimental results show that compared with the TVL LRS algorithm and the PFO scheme, the proposed algorithm has lower total number of self healing nodes, lower distance of node topological movement and higher network outlet bandwidth. |
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