非合作信标条件下水下无线传感网可靠定位技术

传统假设水下无线传感器网络的传感器节点和信标节点都是合作的,但是在军事应用等特殊场合下,某些节点容易被敌方捕获或入侵,因而水下无线传感网络中有时会存在一些非合作的恶意节点。针对存在若干非合作信标的水下无线传感器网络定位应用,提出了一种非合作信标节点约束下水下无线传器网的可靠节点定位算法。本文算法利用一跳邻居范围内信标节点独自投票机制实现对非合作信标的判决与剔除,从而减少由于存在非合作信标节点对定位误差的影响,同时也分析了不同比例非合作信标下的定位误差界限。仿真结果验证了本文提出的算法相比传统定位算法,在平均定位精度和定位覆盖率等方面都有所提高。

Robust Localization for Underwater Wireless Sensor Networks with Non-Cooperative Anchors

It is assumed that all sensor and anchor nodes are cooperative in traditional researches of underwater wireless sensor networks.However,in some particular situations such as military applications,partial anchor nodes are easy to be captured or invaded by the enemy,so there may be some malicious anchor nodes in underwater wireless sensor networks sometimes.Aiming at localization applications of underwater wireless sensor networks with non-cooperative anchor nodes,this paper proposes a robust localization method for underwater wireless sensor networks in the presence of a few non-cooperative anchor nodes.The proposed algorithm uses a distributed self-voting mechanism of anchor nodes within one-hop neighborhood to detect and eliminate non-cooperative anchors,so as to reduce the impact of malicious anchor nodes on positioning accuracy.Meanwhile,localization error bounds under different proportions of non-cooperative anchors are also analyzed in this paper.Simulation results verify that the proposed algorithm improves average positioning accuracy and localization coverage ratio compared with the traditional positioning algorithm.