C-V2X下车载安全数据两阶段组播的中继选择与功耗分析  

Relay Selection and Power Analysis for Two-Stage Multicast Transmission of Vehicle Safety Data Under C-V2X

作　　者：肖海林 吴彬[2] 张中山 XIAO Hai-lin;WU Bin;ZHANG Zhong-shan(College of Computer and Information Engineering,Hubei University,Wuhan,Hubei 430062,China;School of Information and Communication,Guilin University of Electronic Technology,Guilin,Guangxi 541004,China;School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]湖北大学计算机与信息工程学院,湖北武汉430062 [2]桂林电子科技大学信息与通信学院,广西桂林541004 [3]北京理工大学信息与电子学院,北京100081

出　　处：《电子学报》2019年第11期2248-2255,共8页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61872406,No.61472094);浙江省重点研发计划项目(No.2018C01059);广西研究生科研创新项目(No.YCSW2018137)

摘　　要：车载通信业务的需求加剧了基站功率消耗,降低了其数据传输的可靠性.本文提出了一种蜂窝网络下基于两阶段组播的车载安全数据传输中继选择策略,以节约系统总功耗为前提来确定中继选择范围,计算出基站功耗最小的最优组播半径x0,并选择距最优组播半径x0最近的车辆作为中继.基于中继的社会属性建立基站群体和中继群体间的非对称演化博弈模型,设计了不影响安全数据传输的中继娱乐数据发送功率动态再分配的奖惩机制.仿真结果表明:当车辆数目超过临界值Kmin时,本文提出的中继选择策略和奖惩机制,可在保证安全数据两阶段组播可靠性的同时,使基站功耗相比直接组播的功耗至少降低25%.The demand for in-vehicle communication services has increased the power consumption of base stations(BSs) and reduced the reliability of their data transmission.This paper presents a relay selection strategy for two-stage multicast transmission of vehicle security data(TSMT-VSD) under cellular networks.In this strategy,the selected relay range is first determined on the premise of saving total power consumption,and then the optimal multicast radius x0 with the lowest BS power consumption is calculated,followed by choosing the vehicle closest to the optimal multicast radius x0 as the relay.Furthermore,based on the social attributes of relays,an asymmetric evolutionary game model between BS groups and relay groups is established,and a reward and punishment mechanism for dynamic redistribution of relay entertainment data transmission power without affecting secure data transmission is designed.The simulation results show that the proposed relay selection strategy and the designed reward and punishment mechanism can not only ensure the reliability of TSMT-VSD,but also save at least 25% power consumption of BS compared with the conventional one-stage multicast transmission,provided that the number of vehicles is beyond the bound Kmin.

关 键 词：中继选择 车载通信 安全数据 演化博弈 

分 类 号：TN929.5[电子电信—通信与信息系统]