CAJ | 학술논문

针对水下动态传感器网络定位的特点及问题,提出了一种基于到达时间差(TDoA)的多频率主动定位方法MFALM(multi-frequency active localization method base on TDoA).该方法将网络节点分为3组:信标节点、中继节点和普通节点.节点之间通过高、低两种频率分别进行近、远距离通信.为减少通信开销,定义了精简的报文格式和有效的通信方式.分析表明,该定位方法由于采用事件驱动、多频通信、精简报文,因此在定位过程中不但能够减少节点的定位开销,延长网络生存时间,而且还有定位精度高、节点密度可调等优点.
침대수하동태전감기망락정위적특점급문제,제출료일충기우도체시간차(TDoA)적다빈솔주동정위방법MFALM(multi-frequency active localization method base on TDoA).해방법장망락절점분위3조:신표절점、중계절점화보통절점.절점지간통과고、저량충빈솔분별진행근、원거리통신.위감소통신개소,정의료정간적보문격식화유효적통신방식.분석표명,해정위방법유우채용사건구동、다빈통신、정간보문,인차재정위과정중불단능구감소절점적정위개소,연장망락생존시간,이차환유정위정도고、절점밀도가조등우점.
We studied several fundamental key issues of localization in underwater sensor networks(UWSNs),then proposed an multi-frequency active localization method(MFALM) based on the time difference on arrival (TDOA) for UWSNs.The method,which is event-driven,divides all the nodes into three groups:buoy nodes,relay nodes,and ordinary nodes.To guarantee the low-power and effectiveness of communication,the nodes communicate with each other by two types of frequencies:low frequency and high frequency,the former is used in long distance communication,while the latter is used in short distance.In addition,package formats for communication between nodes were defined,which make the packages short and can reduce the costs of sensor nodes in localization.Analysis shows that our method,which has the characteristics of event-driven,reduced packages and multi-frequency,has low communication cost and can extend the network lifetime.