数据丢包对WSNs级联失效机理研究

Research on WSNs cascading failures mechanism under the data packet loss

中文关键词  无线传感器网络  级联失效  Zigbee  丢包节点

英文关键词  wireless sensor networks  cascading failure  Zigbee  packet loss node

中文摘要

      传统无线传感器网络级联失效研究中未考虑丢包节点的全面影响，仿真模型也难以满足实验抗毁性测试要求。针对该问题,本文以节点的真实收包量为负载构建了网络级联失效模型，提出基于节点重要程度的抗毁性度量方法，并采用了Zigbee技术搭建实测网络，对丢包节点存在下的级联失效现象和不同负载分配方式对级联的影响进行了实验分析。同时，对丢包节点对不同抗级联策略的影响进行了实验对比.实验结果表明，一定条件下节点的丢包行为对网络的级联失效有很大的缓解作用，不同的负载分配方式呈现出不同的级联失效特点。另外，在多数低速率无线传感器网络中，级联时保留丢包节点可提升网络的级联失效抗毁性。

英文摘要

      The traditional cascading failure research of wireless sensor networks does not consider the overall impact of packet loss nodes, and the simulation model is difficult to meet the requirements of experimental survivability test. In order to solve the problem, this paper constructs a cascading failure model of network based on the actual number of packets received by sensor nodes, proposes the method based on the node importance for the measuring survivability, and adopts Zigbee to build the test network. The cascading failure phenomenon of network under packet loss nodes and the impact of different load distribution methods on network cascading failure are experimentally analyzed. At the same time, the impact of packet loss nodes on different anti cascading strategies is compared experimentally. The experimental results show that the packet loss behavior of nodes can greatly alleviate the cascading failure of network under certain conditions, and different load distribution methods show different cascading failure characteristics. In addition, in most low-speed wireless sensor networks, preserving packet loss nodes during cascading enhances the network’s cascading failure survivability.