基于RSSI和反馈机制的无线传感器网络定位优化算法

Improved DV-hop localization algorithm based on RSSI and feedback mechanism

在基于无线传感器网络的定位计算中,DV-Hop类算法得到了广泛的应用,如何有效提升定位精度并保持其稳定性是其面临的核心问题之一。平均每跳距离的可获得性和性能的动态变化使得DV-Hop类算法直接应用到不同设置的网络环境中面临巨大挑战。为此提出了一种普适性反馈机制,引入位置调整因子和基于RSSI的跳距优化算法,在未知节点与信标节点之间建立位置信息的反馈链路,通过多种网络模型的仿真计算结果表明,在资源变化的网络计算环境中,所提出的定位算法能够显著地提高定位精度,且具有更强的稳定性。

Among the localization algorithms based on wireless sensor network, DV-Hop has been widely used. The issue of promoting the localization accuracy and maintaining the stability is one of the key problems for DV-Hop. The availability of the average distance and the dynamic change of performance make it difficult for DV-Hop in various network layout. To solve this issue, a novel algorithm based on u- niversal feedback mechanism for the location adjustment factor and the optimized solution of hop size u- sing RSSI is introduced, the feedback channels between the unknown node and the beacons are estab- lished. Simulation experiments are made in various network layout. Simulation results show that the pro- posed algorithm can promote the localization accuracy and keep stability of performance under conditions of resources changes.