关键词：无线传感器网络；定位；锚；网格扫描算法
摘 要：Localization is a fundamental and essential issue for wireless sensor networks (WSNs).In this paper,we present a range-free region localization (RFRL) algorithm for static WSNs,in which each unknown node collects the location information of anchors within its two-hop distance,and then some location information of its one-hop anchors and two-hop anchors are chosen to implement a grid-scan algorithm.Analysis and simulation results show that our algorithm outperforms the other Grid-Scan schemes even when the communication radius is irregular.