基于实时数据库的城市轨道交通综合监控系统实时数据压缩子系统研究

A Study on Real-time Data Compression Subsystem in ISCS Based on RTDB

在城市轨道交通综合监控系统(ISCS)中,系统不断扩展导致实时数据量不断增大,迫切需要一种简单高效的管理实时数据的方法。分析了实时数据的数学模型,确认了对实时数据进行压缩处理的可行性。论述了实时数据库(RTDB)在ISCS通信模型中应用的特点,提出以RTDB为基础,增加实时数据压缩模块,并设计了一套与压缩方法配套的数据缓存系统。通过数据缓存与压缩算法的结合,使实时数据压缩子系统能够应对ISCS中大量通信数据并发的问题,实现对ISCS通信数据进行压缩处理的功能。

In ISCS, the continuous expansion of the system leads to the increasing amount of real- time data, so there is an urgent need for a simple and efficient way to manage real-time data. By analyzing the mathematical model of real-time data. the feasibility of real-time data compression was confirmed. After discussing the application characteristics of RTDB in ISCS communication model, proposed to add real-time data compression module based on RTDB while a set of data caching system that supported the compression method was designed. Through the combination of data caching and compression algorithm, the real-time data compression subsystem can deal with the problems of mass communication data concurring in ISCS and realize the function of compressing ISCS communication data.