摘要
针对当前方法传感网络数据平均传输时延较长的问题,提出基于同步信号的非对称耦合传感网络同步控制数学建模.利用网络中字段的接收集计算发送字段的概率,得到最大后验估计和最大似然估计,分析非对称耦合传感网络的传输信道,构建网络分群结构,利用群节点来采集数据,并将数据发送给群首节点,群首节点将节点信息汇聚并进行容错,结合容错结果,对网络数据进行传输.在此基础上,利用远程控制节点发送同步信号,建立耦合关系对传感网络控制,采用非对称耦合结构来加强控制作用,计算网络节点之间的耦合强度,得到传感网络的耦合矩阵,并计算矩阵的特征值,使传感网络同步流可以达到稳定,最终实现非对称传感网络同步控制的数学建模.实验结果表明,提出方法在对传感网络同步控制时,网络数据平均传输时延较并且数据的丢包率较小,能够有效的实现网络的同步控制.
At present,the average transmission delay of sensor network data is long. Therefore,a mathematical modeling method for synchronous control of asymmetric coupled sensor network based on synchronous signal is proposed. First of all,the receiving set of the field in network was used to calculate the probability of transmitting fields. Then,the maximum posteriori estimation and the maximum likelihood estimation were obtained. After that,the transmission channel of asymmetric coupled sensor network was analyzed and the network clustering structure was constructed. In addition,grouping nodes were used to collect data,and then data was sent to the leader node. The leader node gathered the node information and performed the fault tolerant operation. Combined with the fault-tolerance result,the network data was transmitted. On this basis,the remote control node was used to send the synchronization signal and build the coupling relationship,so as to control the sensor network. The asymmetric coupling structure was used to enhance the control. Moreover,the coupling strength between the network nodes was calculated to obtain the coupling matrix of sensor network,and the feature value of matrix was calculated,so that the synchronous flow of sensor network could be stabilized. Finally,the mathematical modeling of synchronous control of asymmetric sensor network was achieved. Simulation results verify that the proposed method can achieve synchronous control of sensor network effectively. Meanwhile,the average transmission delay of network data is smaller and the packet loss rate is lower.
作者
柳静
连冬艳
胡双年
LIU Jing;LIAN Dong-yan;Hu Shuang-nian(Nanyang Institute of Technology,School of Mathematics and Statistics,Nanyang Henan,473000 China)
出处
《计算机仿真》
北大核心
2019年第10期265-268,284,共5页
Computer Simulation
基金
中国河南省科技厅(项目编号:182102210379)
关键词
非对称耦合
传感网络
同步控制
数学建模
Asymmetric coupling
Sensor network
Synchronous control
Mathematical modeling
