重庆邮电大学学报（自然科学版）Issue(1)：30-36,7.DOI:10.3979/j.issn.1673-825X.2016.01.005
一种低通信开销联合时钟同步和定位算法
A joint clock synchronization and localization algorithm with low communication overhead
摘要
Abstract
Aiming at the demand of reducing the communication overhead in wireless sensor networks(WSNs),we propose a joint clock synchronization and localization algorithm based on modified pairwise broadcast synchronization (PBS)proto-col.In our proposed scheme,anchor nodes (unknown clock bias and known position)overhear the timing message exchan-ges of reference node (known clock bias and known position)and unknown node (unknown clock bias and unknown posi-tion)without sending extra messages.So the proposed algorithm can reduce more communication overhead and require less reference nodes than those algorithms based on two-way message exchanges model.In the proposed algorithm,we obtain es-timators of clock and localization parameters of unknown node,the estimators of clock parameters of anchor nodes.Via ana-lyzing and simulating its estimation performance,we can find the estimation performance of the proposed algorithm meets these cramer-rao lower bound(CRLB)and is close to the estimation performance of other two available algorithms.Consid-ering the tradeoff between the estimation performance and communication overhead,we can see that this algorithm performs better than the available joint clock synchronization and localization algorithms.关键词
无线传感器网络/联合时钟同步和定位/通信开销Key words
wireless sensor networks/joint clock synchronization and localization/communication overhead分类
信息技术与安全科学引用本文复制引用
丁进,林基明,周继华,赵响,刘韦韦..一种低通信开销联合时钟同步和定位算法[J].重庆邮电大学学报（自然科学版）,2016,(1):30-36,7.基金项目
国 家 自 然 科 学 基 金项目 （61172054，61362006）；广 西 自 然 科 学 基 金项目 （2014GXNSFAA118387，2013GXNSFAA019334）；桂林电子科技大学研究生创新项目（GDYCSZ201409）。Foundation ItemNational Natural Science Foundation of China （61172054 and 61362006）；The Guangxi Natural Science Foundation （2013GXNSFAA019334）；The Innovation Project of GUET Graduate Education （GDYCSZ201409）． （）
