|
|
Frontiers of Information Technology & Electronic Engineering
ISSN 2095-9184 (print), ISSN 2095-9230 (online)
2021 Vol.22 No.1 P.51-67
Freshness constraints of an age of information based event-triggered Kalman consensus filter algorithm over a wireless sensor network
Abstract: This paper presents the design of a new event-triggered Kalman consensus filter (ET-KCF) algorithm for use over a wireless sensor network (WSN). This algorithm is based on information freshness, which is calculated as the age of information (AoI) of the sampled data. The proposed algorithm integrates the traditional event-triggered mechanism, information freshness calculation method, and Kalman consensus filter (KCF) algorithm to estimate the concentrations of pollutants in the aircraft more efficiently. The proposed method also considers the influence of data packet loss and the aircraft’s loss of communication path over the WSN, and presents an AoI-freshness-based threshold selection method for the ET-KCF algorithm, which compares the packet AoI to the minimum average AoI of the system. This method can obviously reduce the energy consumption because the transmission of expired information is reduced. Finally, the convergence of the algorithm is proved using the Lyapunov stability theory and matrix theory. Simulation results show that this algorithm has better fault tolerance compared to the existing KCF and lower power consumption than other ET-KCFs.
Key words: Distributed Kalman consensus filter (KCF), Event-triggered mechanism, Age of information (AoI), Stability analysis, Energy optimization
王蕊1，李雅辉1，孙辉1，张友民2
1中国民航大学电子信息与自动化学院，中国天津市，300300
2康考迪亚大学机械、工业与航空工程系，加拿大魁北克蒙特利尔，H3G1M8
摘要：提出一种新的基于无线传感网络的事件触发卡尔曼一致性滤波（ET-KCF）算法。该算法基于信息新鲜度，通过计算采样信息的信息年龄（ageofinformation，AoI）度量信息的新鲜度。该算法集成传统的事件触发机制、信息新鲜度计算方法和卡尔曼一致性滤波（KCF）算法，可以更有效地估计飞机舱内的污染物浓度。该方法还考虑了数据包丢失和通信路径丢失对信息传输的影响，提出一种基于AoI约束的ET-KCF阈值选择方法，将每个数据包的AoI与系统最小平均AoI比较。该方法减少了对过期信息的传输，大大降低了网络能耗。最后，利用李雅普诺夫稳定性理论和矩阵理论证明了算法的收敛性。仿真结果表明，与现有KCF算法相比，该算法具有更好的容错性，与其他ET-KCF算法相比，其功耗更低。
关键词组：
References:
Open peer comments: Debate/Discuss/Question/Opinion
<1>
DOI:
10.1631/FITEE.2000206
CLC number:
TP391; TP393
Download Full Text:
Downloaded:
5245
Download summary:
<Click Here>Downloaded:
1662Clicked:
5441
Cited:
0
On-line Access:
2021-01-11
Received:
2020-04-30
Revision Accepted:
2020-08-30
Crosschecked:
2020-12-11