基于“分簇”的V2X车载广播信息传输策略  

V2X broadcast information transmission strategy based on cluster

作　　者：李婉莹 邱斌[1,2] 蒋为[1] 朱丹 LI Wanying;QIU Bin;JIANG Wei;ZHU Dan(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004 China;College of Information Science and Engineering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]桂林理工大学信息科学与工程学院,广西桂林541004

出　　处：《现代电子技术》2020年第11期10-14,19,共6页Modern Electronics Technique

基　　金：国家自然科学基金(61472094);广西自然科学杰出青年基金(2014GXNSFGA118007);广西自然科学基金项目(2018GXNSFBA281057);广西研究生科研创新项目(YCSW2018137)。

摘　　要：为减少车载信息传播时延,提出基于"分簇"的V2X车载广播信息传输策略。该策略以传输速率最大的车载用户作为"簇头",并采用注水算法为"簇头"分配功率。对车载信息进行紧急信息和非紧急信息分类传输。对于紧急信息,通过"簇头"实现信息中继转发,利用散射体一次、二次散射缩短通信时延;对于非紧急信息,在信道空闲时利用蜂窝通信进行广播。数值结果表明,相比于经典的LEACH算法,所提算法通过"分簇"提高信道利用率14.49%以上;相比于5G-V2X通信中虚拟小区,所提算法使得1 000 m内紧急信息通信时延平均减少2.21 ms。In order to reduce the vehicular information transmission delay,the V2X(Vehicle-to-X)broadcast information transmission strategy based on cluster is proposed. In the strategy,the vehicles which have the maximum transmission speeds are taken as the cluster heads and the water injection algorithm is utilized to allocate the power to the cluster heads first,and then,the information is divided into emergency information and non-emergency information,and the cluster heads forward emergency information data via the primary and secondary scattering of scatters to reduce the communication delay. Moreover,cellular network is used for broadcast transmission of the non-emergency information when the channel is idle. The numerical simulation results show that,in comparison with the classical LEACH algorithm,the channel utilization of the proposed algorithm based on cluster can be increased by about 14.49%,and in comparison with the virtual cell in 5G-V2X,the time delay of the emergency information transmission in 1 000 m can be reduced by 2.21 ms.

关 键 词：车载通信 V2X 分簇 信息传输 分类传输 中继转发 通信时延 

分 类 号：TN949.6-34[电子电信—信号与信息处理]