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论文类型：会议论文

发表时间：2010-12-05

收录刊物：EI、CPCI-S、Scopus

页面范围：272-276

关键字：Range-free Localization; Radio Irregularity; Asymmetric Wireless Sensor Networks

摘要：This paper investigates the radio irregularity (RI) phenomenon and its impact on communication performance in wireless sensor networks (WSNs). Based on the theoretical analysis, we find that the RI phenomenon induces the asymmetric links problem. According to this discovery, we propose a novel HCT (Hop-count Correction Tree) scheme to handle this problem. HCT utilizes graph theoretical method to get a search tree and correct the hop count error that appears in the adjacent nodes. Practical results obtained from testbed experiments demonstrate that this solution can greatly improve localization accuracy in the presence of RI.