数字专网的通信终端与加密组件测试系统设计

Design of Test System for Communication Terminal and Encryption Components of Digital Private Network

摘要:

为提高数字专网的通信终端与配套加密组件测试效率,降低实装测试环境的构建、运维及人力成本,开展了基于半实物仿真的测试系统设计；对通信终端与加密组件的测试需求进行了分析,提出并实现了一种模拟数字专网的通信建链流程和加密通信业务流程的方法；采用了通用AXIe(仪器与测试高级电信计算架构的扩展)测试平台与扩展测试仪器的架构进行系统设计,实现与不同测试对象的物理接口适配、信号调理以及报文数据交互控制,为通信终端及加密组件的加密业务成功率测试、语音质量评测以及远供工作电流测量提供自动化测试技术手段；经验证,测试系统通信链路时延＜100ns,可为通信终端提供良好的语音质量评测环境,PESQ(感知语音质量评测模型)测试≥4.20,可支持加密业务成功率指标≥99.9%的无人值守测试。

Abstract:

In order to improve the test efficiency of digital private network communication terminal and corollary encryption components, and reduce the cost of construction, operation and labor testing, a hardware in loop simulation test system is designed; the testing requirements of communication terminal and encryption component are analyzed, and a method to simulate the communication chain construction process and encryption communication service process of digital private network is proposed and implemented; the architecture of general AdvancedTCA eXtensions for Instrumentation and Test (AXIe) test platform and extended test instruments adopted to design the system, the physical interface adaptation, signal conditioning and message data interaction control with different test objects are realized through the test instrument, it provides automatic test technology for the success rate of encryption service, voice quality evaluation and remote working current measurement of communication terminal and encryption components; it has been verified that the communication link delay of the test system is less than 100 nanosecond, it can provide a good voice quality evaluation environment for the communication terminal, and the tested Perceptual evaluation of speech quality (PESQ) is not less than 4.20, it can support unattended testing with a success rate of encryption service not less than 99.9%.