基于MT9172的K口通信模块设计

目前，在军用战术互联网无线通信系统中，超短波/短波电台和多频段电台对外提供非标准的K接口供用户数据接入使用。在各类通信控制设备设计中，为实现语音和IP业务数据以无线的方式接入战术互联网1]，需要设计K口通信单元与各类电台进行数据交互。为解决此问题，设计了基于FPGA和MT9172的K口通信模块，FPGA主要实现K接口链路层功能，通过TDM口实现数据接入，按时隙对语音与业务数据进行复接、缓存与发送，实现与电台间的同步与环路信令握手。MT9172主要实现K接口物理层功能，并为FPGA提供串行数据接口。设计实现了野战网接口标准中定义的K口工作模式3，传输速率为128kbps，完成了TDM口到K口的接口转换。经验证，该K口通信模块能够可靠应用于各类需要接入战术互联网的通信控制设备中。

Design of K-port Communication Module Based on MT9172

At present, in military tactical Internet wireless communication systems, ultra-shortwave / shortwave and multi-band radios provide a non-standard K interface for user data access. In the design of all kinds of communication control devices, in order to realize the voice and IP business data to wirelessly access the tactical Internet1], it is required to design a K-port communication unit to interact with various types of radio stations for data interaction. In order to solve this problem, a K-port communication module based on FPGA and MT9172 is designed. The FPGA mainly implements the link layer function of the K interface, achieves data access through the TDM port, multiplexes, buffers and sends voice and service data according to time slots, Realize synchronization and ring signaling handshake between stations. The MT9172 mainly implements the K interface physical layer functions and provides a serial data interface for the FPGA. Design and implementation of the field network interface standard defined K-mouth mode of operation 3, the transfer rate of 128kbps, completed TDM port to K port interface conversion. It is verified that the K-port communication module can be reliably applied to various communication control devices that need to access the tactical Internet.