基于势博弈的车车通信频谱资源分配方法  

Train-to-Train Communication Spectrum Resource Allocation Method Based on Potential Game Theory

作　　者：陈永[1] 袁姣姣 陶瑄 CHEN Yong;YUAN Jiaojiao;TAO Xuan(School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学电子与信息工程学院,甘肃兰州730070

出　　处：《铁道学报》2024年第11期75-83,共9页Journal of the China Railway Society

基　　金：国家自然科学基金(62462043,61963023);兰州交通大学基础研究拔尖人才项目(2022JC36);兰州交通大学重点研发项目(ZDYF2304)。

摘　　要：针对5G-R下高速铁路通信系统中车车通信T2T链路在复用车地通信T2G链路的频谱资源进行通信时,存在系统干扰大和吞吐量低的问题,提出一种基于势博弈的T2T频谱资源分配方案。通过分析T2T通信链路复用T2G通信链路频谱资源时的竞争关系,构建以系统吞吐量最大化为优化目标的T2T频谱复用模型。提出基于势博弈理论的T2T频谱资源分配方法,并证明了存在纳什均衡。通过烟花算法求解出优化目标函数,实现T2T链路频谱和功率的最优分配。对不同列车速度、T2T链路接入数量和链路发射功率条件下,系统吞吐量和干扰率进行定量分析。试验结果表明:所提方法能够显著提高T2T系统吞吐量,并有效减少链路干扰。研究结果为高速铁路车车通信资源的优化提供了一定的理论和技术支持。A spectrum resource allocation scheme based on potential game theory was proposed for train-to-train(T2T)communication links in high-speed railway communication systems operating under 5G-R,where the spectrum resources were shared with train-to-ground(T2G)communication links.The scheme addresses the challenges of high inter-link interference and low system throughput.Firstly,by analyzing the competitive relationship between T2T communication links and T2G communication link when sharing spectrum resources,a T2T spectrum sharing model was constructed with the objective function for maximizing system throughput.Secondly,a T2T spectrum resource allocation method based on potential game theory was proposed,with the existence of Nash equilibrium being proved.Next,the optimal spectrum and power allocation strategies for T2T communication links were obtained using the fireworks algorithm.Finally,a comprehensive analysis of system throughput and interference rate was conducted considering variations in train speeds,the number of T2T link accesses,and T2T link transmission power.The experimental results demonstrate that the proposed spectrum resource allocation scheme significantly improves system throughput and effectively reduces inter-link interference.The research findings provide theoretical and practical support for performance optimization and resource management in high-speed railway communication systems.

关 键 词：车车通信 频谱分配 势博弈 吞吐量 约束优化 

分 类 号：U285.5[交通运输工程—交通信息工程及控制] TP393[交通运输工程—道路与铁道工程]