用于程控交换机呼叫模拟的事件表驱动实时模拟法

The Event Table-Driven Real-Time Call Simulation Approach for SPC Switching Systems

本文提出一种程控交换机呼叫模拟的有效方法——事件表驱动实时模拟法。它采用事件表的形式由软件生成强度和参数可调的呼叫流直接注入呼叫处理机,利用“时间 冻结”技术保证模拟的实时性,实现在没有话路硬设备的情况下,对不同话务强度的各种呼叫类型和呼叫混合进行实时模拟。文章还根据典型的话务数据对模拟的时空效率进行了计算,计算结果表明所提出的方法是实际可行的。该方法已成功地应用于国产中大容量程控交换机环境模拟器的研制,为程控交换机软件差错检测和呼叫处理能力的测定提供了有效的手段。

An efficient call simulation method for SPC switching systems, event table-driven real-time simulation approach has been proposed in this paper. It generates call flow with adjustable intensity and parameters in the form of event table and directly loads the traffic onto the call processor by means of software. In addition, it employs the 'time freezing' technique to ensure the real-time characteristic of simulation so that the real-time simulation for different call type and call mix with different traffic intensity can be realized with no speech path hardware connected. The time and space efficiency (?) simulation is evaluated based on typical traffic data The analysis result shows that the proposed approach is practically feasible. The approach has been successfully applied to the development of the environment simulator for the Chinese-made medium to large-sized SPC exchange, which provides SPC switching systems with an efficient means of software error detection and the measurement of call processing capability.