程控交换机呼叫模拟的一种有效方法

An Efficient Approach to Call Simulation for SPC Switching Systems

本文给出了一种程控交换机呼叫模拟的有效方法——事件表驱动模拟法。该方法克服了传统的模拟呼叫发生器必须与话路设备相接、话务量不高、参数调节不灵活等局限性,采用事件表的形式由软件直接将话务注入交换处理机,利用“时间冻结“技术确保模拟机和系统机之间的实时同步,实现了在没有话路硬件的条件下对程控交换机进行各种呼叫的实时模拟。该方法已成功地应用于国产中大容量数字程控交换机环境模拟器的研制,为程控交换机软件系统级检测和处理机的BHCA值的精确测定提供了有效的手段。

An efficient call simulation method for SPC switching systems—event table-driven Simulation approach is proposed. Through direct traffic loading onto the switching processors by software in the form of event table and using 'time-freezing' technique to ensure the real-time synchronization between simulator and switching system, the approach can perform real-time simulation of different call types for SPC exchanges with no speech path hardware connected. In this way, it overcomes the limitations of traditional simulated call generator, which include the necessary connection of speech path hardware, insufficient traffic generation capacity and unsatisfatory flexibility of parameter adjustment. The proposed approach has been successfully applied to the development of the environment simulator for the Chinese-made medium to large-scale digital SPC exchange, which provides an efficient means for the system-level fault detection of SPC exchange software and the accurate measurement of processor BHCA value.