基于IP协议的卫星组网通信关键技术研究

Studying on the Key Technologies of IP-based Broadband Satellite Networks

早期卫星组网一般采用地球同步卫星(GEO)作为中继器,而现在的卫星宽带信息网则是通过星间链路(ISL)实现相邻卫星之间直接通信,研究宽带卫星组网技术对于加快我国信息基础设施建设具有极其重要的作用。本文首先介绍卫星通过星间链路组网通信的系统模型,然后分析卫星网络IP系统的协议堆栈,并对卫星网络TCP/IP协议各层采用的接口和协议、基本功能、工作方式等进行详细研究,最后对卫星组网通信中涉及的物理层、数据链路层和网络层的关键技术逐一进行了探讨。

Early satellite networking commonly use the earth synchronization satellites(GEO)as relays,while present broadband satellite networking achieve the direct communications between adjacent satellites through inter-satellite links(ISL).The study of technologies of broadband satellite networking has a very important effect on accelerating our country's information foundation networks.In this paper,the system model of networking communications through inter-satellite links is introduced firstly,then the protocol stack for satellite network IP systems is analyzed,and to every layer of TCP/IP protocol in satellite networks,the applied interfaces and protocols,essential functions,working modes and so on are studied in detail,finally the key technologies of physical layer,data link layer and network layer involved in satellite networking communications are discussed one by one.