轨道交通车载设备通用信息交互协议的设计

Design of the Universal Information Exchange Protocol for On-board Equipments of Rail Transit

随着轨道交通装备信息化、智能化的发展,车载设备的访问需要一套安全、可靠、统一、高效的数据交互协议,以防范数据丢失、被窃取和利用的风险。为此,文章提出一套设备通用信息交互协议(universal information exchange protocol,UXP)。该协议由一系列基本服务组成,严格定义了接入权限管理机制,并对传输数据进行动态加密;同时,协议提供断点续传、压缩传输等高效文件传输模式,并引入滑动窗口和动态重传机制来提升协议的传输效率。通过UXP通信与FTP通信性能比较实验、UXP通信添加效率优化机制前后的性能比较实验,结果显示,文中所提UXP不仅能使数据在不同网络环境中保持高效传输,而且还能保证数据安全、可信。

With the information and intelligence development of rail transit equipment,a safe,reliable,unified and efficient data exchange protocol is needed for vehicle equipment access.This paper proposes a universal information exchange protocol(UXP)made up with a series of basic services.Privilege management mechanism is defined in the UXP and data transmission is dynamically encrypted.The protocol provides efficient data transmission modes,such as break-point continuously transmission,compression transmission,and sliding window transmission and dynamic retransmission mechanism are introduced to improve the transmission efficiency of the protocol.Through various verification such as communication performance comparison between UXP and FTP,UXP communication performance before and after optimization,the results show that the UXP can maintain efficient data transmission in different network environments and guarantee the security of data transmission.