CAJ | 학술논문

质心算法是一种简单易实现的节点定位方法，但是它的定位精度多依赖于网络中信标节点的密度和分布。针对质心算法这一缺陷，文中提出了一种移动信标节点辅助的加权质心定位算法( MBAWCL)。该算法采用一个飞行的移动信标节点在网络部署区域上空按照设定的路径移动并且周期性地广播自己的位置信息；未知节点对所接收信标信号采取一定的筛选机制存储信标信号，然后利用加权质心( WCL)方法计算自己的位置。实验测试证明该算法可以提高节点的定位精度，降低定位成本，提高定位效率。
질심산법시일충간단역실현적절점정위방법，단시타적정위정도다의뢰우망락중신표절점적밀도화분포。침대질심산법저일결함，문중제출료일충이동신표절점보조적가권질심정위산법( MBAWCL)。해산법채용일개비행적이동신표절점재망락부서구역상공안조설정적로경이동병차주기성지엄파자기적위치신식；미지절점대소접수신표신호채취일정적사선궤제존저신표신호，연후이용가권질심( WCL)방법계산자기적위치。실험측시증명해산법가이제고절점적정위정도，강저정위성본，제고정위효솔。
The centroid algorithm is a simple method to achieve node localization,but its localization accuracy depends on the density and distribution of the beacon nodes in network. According to the defect of centroid algorithm,present a Mobile Beacon Assisted Weight Cen-troid Localization algorithm ( MBAWCL) . The algorithm adopts a flight mobile beacon node to move over the network deployment area according to destined path and broadcast periodically the messages with its own localization. Unknown node takes a screening mechanism to store the received beacon signal,and then use the method of WCL to calculate its own position according to its stored beacon signal in-formation. The experiments prove that the algorithm can reduce the localization error and cost and improve the efficiency of localization.