面向信息年龄的车辆状态更新网络采样与功率控制  

Age of information-oriented sampling and power control in vehicular status update networks

作　　者：曾健华 郭重涛[1] 郭成 ZENG Jianhua;GUO Chongtao;GUO Cheng(College of Electronics and Information Engineering,Shenzhen University,Shenzhen 518060,China;Peng Cheng Laboratory,Shenzhen 518055,China)

机构地区：[1]深圳大学电子与信息工程学院,广东深圳518060 [2]鹏城实验室,广东深圳518055

出　　处：《物联网学报》2024年第1期71-83,共13页Chinese Journal on Internet of Things

基　　金：国家自然科学基金项目(No.62101339);深圳市自然科学基金项目(No.JCYJ20190808114213987);鹏城实验室宽带通信研究部重大关键项目(No.PCL2023AS1-1)。

摘　　要：针对基于广播通信的车辆状态更新网络,采用最小时间戳优先的D/Geo/1/1排队系统模型传输数据包,利用排队论分析了接收端的信息年龄(AoI,age-of-information)中断概率和发送端的平均发送功率,根据AoI中断概率随数据包采样速率和发送功率变化的单调性,提出了基于迭代的采样速率和发送功率联合优化算法,通过采样与功率控制在功率受限的条件下最小化所有接收端中的最大AoI中断概率,实现了接收端信息新鲜度的公平提升。仿真结果验证了理论分析的准确性和算法的高效性。In a vehicular status update network based on broadcast communication,a D/Geo/1/1 queuing mechanism with minimum timestamp priority was adopted to transmit data packets.The queuing theory was used to analyze the age-of-information(AoI)outage probability of the receivers and the average transmit power of the transmitter.Based on the monotonicity of the AoI outage probability with respect to packet sampling rate and transmit power,an iterative algorithm for jointly optimizing sampling rate and transmit power was proposed to minimize the maximum AoI outage probability of all receivers under power constraint,which fairly improved information freshness of all receivers under sampling and power control.Simulation results verify the accuracy of theoretical analysis and the efficiency of the algorithm.

关 键 词：车辆状态更新网络 广播通信 信息年龄中断概率 功率控制 

分 类 号：TN929.5[电子电信—通信与信息系统]