Design And Implement Of Codec Scheme Of Adapter In Td-Lte Terminal Test System Based On Ttcn-3

With the rapid development of TD-LTE industry, the research and development of the terminal test system is an important part of the whole industry chain. The wireless terminal integrated test system with test terminal RF performance and basic call/audio function, plays an essential role in a series of work such as R&D, production, and certification. Therefore, to carry out research and development of TD-LTE test system for wireless terminal is reality required and necessary to ensure the healthy development of the TD-LTE industry chain.The TD-LTE terminal test system adaptation layer software based on TTCN-3is one of the core software of the TD-LTE terminal test system. Codec module is the core module of the adaptation layer software. It is of great importance to the information exchange between the high-level protocol stack and low-level protocol stack. This article is based on the research of the adaptation layer software. Fully understanding the functional requirements of the adaptation layer software codec module, this article carrys out different types of primitive codec program, including:compact incidental codec verify information type codec program does not come with additional information about the non-compact codec.The study and the results of this article have been successfully applied to the commercial version of the TD-LTE terminal test system.It operates and performances steadily in this system so far.