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文章介绍了分组无线网-PRN（PacketRadioNetwork）技术的一个重要组成部分，即IP协议层到PRN协议层接口的研究和实现过程。通过对IP层到低层协议接口的分析，给出了PRN协议层到IP协议层的界面的描述，设计了实现界面功能的命令和处理过程。实现了IP数据报透明地通过PRN，应用层则实现了FTP的基本功能。
This paper introduces an important part of packet radio network (PRN) technology, that is, the research and implementation of IP protocol layer to PRN protocol layer interface. Through the analysis of the IP layer to the lower protocol interface, the description of the interface from the PRN protocol layer to the IP protocol layer is given, and the command and process to realize the interface function are designed. Realize the IP datagram transparently through the PRN, the application layer is to achieve the basic functions of FTP.