基于模糊逻辑的铁路机车无线通信接入拥塞控制系统设计

Design of Locomotive Wireless Communication Access Congestion Control System Based on Fuzzy Logic

摘要:

铁路机车无线通信主要用于列车与控制中心之间的数据传输,如果通信网络出现拥塞,会导致信息传输延迟或失败,进而影响到列车的运行安全。为了提高铁路机车无线通信接入的流畅性,设计了基于模糊逻辑的铁路机车无线通信接入拥塞控制系统。通过数据解析分类模块对数据包进行解析,经过WRED模块完成丢包处理,传输给队列模块,通过队列的整理将数据传输给模糊逻辑控制器模块,在模糊逻辑控制器模块中,利用模糊逻辑理论,设计了模糊控制规则,依据逐跳拥塞控制,完成系统的硬件设计。在系统的软件设计中,根据无线通信接入数据在队列模块的缓存情况,感知无线通信接入节点的状态,通过获取无线通信接入节点的剩余队列,预测无线通信接入路径的拥塞情况,在无线通信接入的最佳路径下,设计了拥塞控制算法,实现对铁路机车无线通信接入的拥塞控制。测试结果表明,设计系统的吞吐量可达到4000kpbs,丢包率和节点死亡率均低于1%,能够有效控制无线通信接入的拥塞情况。

Abstract:

Locomotive wireless communication is mainly used for data transmission between the train and the control center. If the communication network is congested, information transmission will be delayed or failed, which will affect the operation safety of the train. In order to improve the smoothness of Locomotive wireless communication access, a fuzzy logic based congestion control system for Locomotive wireless communication access is designed. The data packet is analyzed through the data analysis and classification module, and the WRED module completes packet loss processing, which is then transmitted to the queue module. The data is then organized and transmitted to the fuzzy logic controller module. In the fuzzy logic controller module, fuzzy control rules are designed using fuzzy logic theory, and the hardware design of the system is completed based on hop by hop congestion control. In the software design of the system, according to the cache of the wireless communication access data in the queue module, the state of the wireless communication access node is sensed, and the congestion of the wireless communication access path is predicted by obtaining the remaining queue of the wireless communication access node. Under the optimal path of wireless communication access, a congestion control algorithm is designed to achieve the congestion control of the Locomotive wireless communication access. The test results show that the designed system can achieve a throughput of 4000kpbs, with packet loss rates and node mortality rates below 1%, effectively controlling congestion in wireless communication access.