Timeliness optimization of unmanned aerial vehicle lossy communications for internet-of-things  

作　　者：Wensheng LIN Lixin LI Yun LIU Yixuan HE Ying LIU 

机构地区：[1]School of Electronics and Information,Northwestern Polytechnical University,Xi'an 710129,China [2]Southwest China Institute of Electronic Technology,Chengdu 610036,China [3]Xi'an Modern Control Technology Research Institute,Xi'an 710065,China [4]Shanghai Institute of Satellite Engineering,Shanghai 201109,China

出　　处：《Chinese Journal of Aeronautics》2023年第6期249-255,共7页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(No.62001387);Shanghai Academy of Spaceflight Technology(SAST),China(No.SAST2020124).

摘　　要：Information freshness is a key factor for Internet-of-Things(IoT)to make appropriate decisions and operations.This paper proposes an analytical framework for evaluating the timeliness performance of the IoT system based on Unmanned Aerial Vehicle(UAV)lossy communications.The performance analysis consists of the outage probability analysis and the Age-of-Information(AoI)analysis with outages.To begin with,we solve a lossy coding problem formulated from the UAV communication system,and derive a closed-form expression of the outage probability based on Shannon's lossy source-channel separation theorem.Then,we characterize the Peak AoI(PAoI)for the considered system,and further minimize the PAoI by deriving the optimal rate for generating information.Moreover,we analyze the system performance through theoretical calculations and simulations.The results indicate that the optimal server utilization ratio is always no larger than 0.5.In practical applications,we can utilize the proposed analytical framework to determine the system parameters which guarantee the timeliness performance of UAV lossy communications.

关 键 词：Age-of-Information Information freshness Lossy communications Unmanned aerial vehicle Outage probability 

分 类 号：TP391.44[自动化与计算机技术—计算机应用技术] V279[自动化与计算机技术—计算机科学与技术] TN929.5[航空宇航科学与技术—飞行器设计]