无人机辅助车联网环境下干扰感知的节点接入机制  

Interference-aware node access scheme in UAV-aided VANET

作　　者：范茜莹 黄传河[1] 朱钧宇 文少杰 FAN Xiying;HUANG Chuanhe;ZHU Junyu;WEN Shaojie(School of Computer Science,Wuhan University,Wuhan 430072,China;Research Center for Computer and Microelectronics Industry Development,MIIT(China Software Testing Center),Beijing 100081,China)

机构地区：[1]武汉大学计算机学院,湖北武汉430072 [2]工业和信息化部计算机与微电子发展研究中心(中国软件评测中心),北京100081

出　　处：《通信学报》2019年第6期90-101,共12页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61772385,No.61373040,No.61572370);“十三五”国家重点研发计划课题基金资助项目(No.SQ2018YFB010236-04-04)~~

摘　　要：在车联网中,链路频繁切换和信道干扰会导致传输时延增加及网络吞吐量下降。引入无人机与地面车辆进行协同通信,构建无人机辅助的空地一体化车联网,采用发送端自主决策的分布式策略,提出了一种干扰感知的节点接入机制。将节点接入问题形式化为一个与链路传输速率、链路切换次数和节点发射功率相关的多目标优化问题,利用对偶分解法将该问题分解为2个凸优化子问题:联合优化链路切换次数与链路传输速率和在保证链路可靠性的前提下优化节点发射功率。仿真实验表明了所提出节点接入机制可有效地改善数据传递率、平均端到端时延以及网络吞吐量。In vehicular Ad Hoc network(VANET),frequent link handovers and channel interference can lead to increased transmission delay and decreased network throughput.To address the issues,unmanned aerial vehicle(UAV)were introduced to cooperate with vehicles and construct UAV-assisted air-ground integrated VANET.An interference-aware node access scheme was proposed.The node access problem was formulated as a multi-objective optimization problem considering link transmission rate,link handovers and transmit power.Then the optimization problem was decomposed into two convex optimization sub-problems by dual decomposition method,the sub-problem jointly optimizes handovers and link transmission rate while the sub-problem optimizes the transmit power based on link reliability.Finally,simulation results show that the proposed mechanism can effectively improve data delivery ratio,average end-to-end delay and network throughput.

关 键 词：车联网 无人机 干扰感知 链路切换 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]