基于D2D的车联网中无线资源分配研究  

Radio resource allocation for D2D-based vehicle network

作　　者：王燕燕 齐丽娜[1] WANG Yanyan;QI Lina(College of Telecommunications ＆ Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2018年第4期55-60,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)(2013CB329005);国家自然科学基金(61471201)资助项目

摘　　要：在基于D2D的车联网中,车辆之间通信时需要复用蜂窝用户的无线资源,所以要根据车联网及蜂窝系统的信道状态信息(Channel State Information,CSI)进行合理的资源分配。但现有的大部分研究都忽略了信道中的小尺度衰落,导致资源分配结果及蜂窝系统容量不准确。因此,文中在进行资源分配时充分考虑了车联网及蜂窝系统中无线信道受到的各种衰落,如大尺度衰落和小尺度衰落,并在现有资源分配方法的基础上,分析了信道中小尺度衰落对于资源分配的影响。仿真结果表明,小尺度衰落对资源分配结果有一定的影响,并且考虑小尺度衰落后得到了更准确的蜂窝系统容量。In the D2D-based vehicle network,vehicle terminals communicate with each other by sharing the same resources with cellular users. Therefore,it is necessary to have a reasonable resource allocation according to the channel state information（ CSI） of all the involved links. But,most of the studies ignore the small-scale fading in the channel,leading to the result of the resource allocation and the capacity of cellular system to be unaccurate. Considering various fadings of the wireless channel in the vehicle network and cellular system,such as large-scale fading and small-scale fading,the impact of small-scale fading on resource allocation is analyzed. The simulation result shows that the small-scale fading affects the results of the resource allocation and the capacity of cellular system.

关 键 词：车联网 D2D 蜂窝系统 小尺度衰落 无线资源分配 

分 类 号：TN929.5[电子电信—通信与信息系统]