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本文分析了互联网播发卫星导航增强信息的特点和优势,并简单介绍了Ntrip(Networked Transport of RTCM via Internet Protocol)协议。在Ntrip的结构和流程基础上,设计了一种基于C/S架构的卫星导航增强信息互联网播发体系。在该体系中,结合Ntrip V2的四级网络架构,实现HTTP(Hypertext Transfer Protocol)模式、RTSP(Real Time Streaming Protocol)模式和简单RTP(Real Time Transport Protocol)模式的多播发服务器卫星导航增强信息互联网播发。在安全方面,通讯方式采用HTTPS协议,服务器和客户端的身份认证采用基本和摘要认证的方式,支持并兼容TLS(Transport Layer Security)协议标准。
This paper analyzes the features and advantages of the Internet broadcast satellite navigation to enhance the information, and briefly introduces the NTP (Networked Transport of RTCM via Internet Protocol) protocol. Based on the structure and flow of Ntrip, a C / S-based satellite navigation and enhanced information internet distribution system is designed. In this system, combined with the Ntrip V2 four-level network architecture, a multi-cast server satellite navigation system that implements Hypertext Transfer Protocol (HTTP) mode, Real Time Streaming Protocol (RTSP) mode, and Real Time Transport Protocol (RTP) broadcast. In terms of security, the HTTPS protocol is used for communication, and the authentication of servers and clients is based on basic and digest authentication. It supports and is compatible with the Transport Layer Security (TLS) standard.