ETSI TS 134 229-4规定了TTCN-3中针对终端的3GPP用户设备（UE）的协议一致性测试 Gm接口，用于使用所谓的IP-CAN测试模型的基本IMS测试用例。它也构成了进一步研究的基础 IM应用程序的一致性测试。本文件是多部分测试规范3GPP TS 34.229的第四部分。下面的TTCN测试 规范和设计考虑可在本文件中找到:总体测试套件结构；测试架构；试验方法和PCO定义；测试配置；TTCN测试仪（系统模拟器）的设计原则、假设和使用的接口；TTCN风格和惯例；部分PIXIT形式；上述协议测试的TTCN-3文件。本文件适用于根据3GPP版本实施的UE，该版本从第5版开始，直到第5版结束 如本文件封面所示。

ETSI TS 134 229-4 specifies the protocol conformance testing in TTCN-3 for the 3GPP User Equipment (UE) at the Gm interface for the basic IMS test cases using the so-called IP-CAN test model. It also forms the basis for further conformance testing for IM applications.The present document is the 4th part of a multi-part test specification, 3GPP TS 34.229. The following TTCN test specification and design considerations can be found in the present document:the overall test suite structure;the testing architecture;the test methods and PCO definitions;the test configurations;the design principles, assumptions, and used interfaces to the TTCN tester (System Simulator);TTCN styles and conventions;the partial PIXIT proforma;the TTCN-3 files for the mentioned protocols tests.The present document is valid for UEs implemented according 3GPP Releases starting from Release 5 up to the Release indicated on the cover page of the present document.