基于D2D的列控系统车车通信资源分配算法

针对基于D2D (Device to Device,设备到设备)的列控系统车车通信(T2T,Train to Train)复用车地通信资源时产生的干扰问题,考虑在保证车车通信用户和车地通信用户通信可靠性的前提下,提出一种车车通信资源分配算法。该算法首先应用图论的加权二部图建立信道分配模型,然后利用改进的KM算法(IKM,Improved Kuhn-Munkres)为车车通信用户分配信道,最后对功率进行调整,使系统的总吞吐量最大化。仿真结果表明,该算法能够较好地解决列控系统车车通信复用车地通信资源时的干扰问题,既满足列控系统通信需求,又提高频谱利用率。

T2T(Train to Train) Communication Resource Allocation Algorithm Based on D2D

To tackle the interference caused by sharing train-ground communication resources in train-to-train communication for train control system based on device-to-device(D2D),a T2T communication resource allocation algorithm is proposed while guaranteeing the communication reliability of T2T and train-ground users.Firstly,the channel assignment model is established using the weighted bipartite graph of graph theory.Then,the IKM(Improved Kuhn-Munkres) algorithm is used to allocate channels for T2T communication users.Finally,the power is adjusted to maximize the total throughput of the system.The simulation results show that the proposed algorithm can solve such interference problem,which not only satisfies the communication requirements of the train control system,but also improves the spectrum utilization.