基于MPTCP的AGV小车无线通讯技术研究

Research on AGV Car Wireless Communication Technology Based on MPTCP

AGV(Automatic/Autonomous Guided Vehicle)为自动导引小车,是集机、电、信息为一体的自动化系统,它涉及机械工程、自动控制、计算机系统、通讯等多种学科技术[1]。工业用自动导引车(AGV)小车通过上位机以无线通讯控制来实现自动上下楼梯并运送货物到指定位置[2]。在现场运行时出现在运动过程中无法连接上位机服务器的情况,经过进一步测试分析发现,问题在于在目前现有的802.11 wifi架构下,运动的AGV在AP间进行切换时,漫游速度太慢导致的掉线。这主要是网卡驱动内的漫游策略和算法的问题。而基于MPTCP协议栈的这种双网卡解决方案对网络掉线问题给我们提供了另一种解决思路。本方案经过现场测试之后,发现可以有效的解决AGV在漫游时所造成的网络阻塞的问题。

Industrial AGV can not connect to PC server when it is running in the field. After further testing and analysis, it is found that the problem lies in the slow roaming speed of AGV when switching between AP under the current 802.11 WiFi architecture. This is mainly the problem of roaming strategy and algorithm in network card driver. This dual network card solution based on MPTCP protocol stack provides us another way to solve the problem of network dropout. After field testing,the scheme can effectively solve the problem of network congestion caused by AGV roaming.