一种适用于综合监控系统的双连接软件通信框架

A Software Communication Framework with Dual Connections Suitable for ISCS

地铁综合监控系统中的子系统、设备和装置间通过通信实现监控数据传输。介绍了综合监控系统中通信软件常用的单连接通信框架,分析了该框架的不足,并提出一种适用于综合监控系统的双连接软件通信框架。该框架充分利用了2个硬件通信通道,同时在其上建立2条互备的软件通信连接,在通信连接失效时通过切换连接保障重要数据的及时传输,并通过携带传输数据编号保证数据既不丢失也不重复。双连接软件通信框架更有效地实现了通信冗余,有助于保障综合监控系统的可靠性。

The function of subsystems, equipment and de- vices in metro ISCS is to transfer supervision and control data through communications. The single connection widely applied in ISCS software is introduced, its deficiencies are pointed out at the same time. Then, a software communica- tion framework with dual communication connections for the ISCS is presented, which makes full use of the two hardware channels, when one communication connection is failed, the other is switched on instead of rebuilding the o- riginal one to ensure the in-time transfer of important data. Thus, the sequence number of communication messages is employed to prevent any losses and repetition of the data. The dual-connection software communication realizes more effectively the redundant communication and helps to guar- antee the reliability of ISCS.