在分析usb通用串行总线工作原理的基础上，讨论了USB测试系统中有关的硬件和软件开发技术。
Based on the analysis of principle of Universal Serial Bus, this paper discusses the developing technology of hardware and software about USB testing system.
第二，通过定义一个被认可了的最小基础特性集和一系列通用测试接口点，标准支持和鼓励多厂家的互操作。
Second, standards support and encourage interoperability amongst multiple vendors by defining an agreed upon minimum base feature sets and a set of common test points at interfaces.
最后在此软件框架基础上，设计实现了面向通用消息增值服务的服务模板，并进行相关功能测试。
Finally, based on the software frame, a common message value-added service template is designed and implemented. And then, associated functions were tested.
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