一种星地一体化路由设计的卫星IP网络

现有大部分支持IP的卫星系统只是提供一个连接地面路由器的物理通道,难以满足宽带接入、多媒体服务以及星地网络一体化等新的需求.为此,提出了一个分组传输和交换均基于IP的GEO卫星系统,并从传输网络和路由结构两方面进行了描述.并针对星上资源紧张的现状,采用了一种地面路由星上交换的新设计思路.通过星上IP交换可实现大量终端间的单跳通信,一个可扩展的集中式IP路由结构可有效减少通过卫星的路由流量,使得通信效率提高的同时,能实现卫星网络与Internet的无缝兼容.

An IP Based Satellite Network with Integrative Design of Space and Ground Segments

Most existing IP based satellite systems have been simply used to prov ide physical access between terrestrial routers. It is difficult to satisfy some new applications, such as broadband access, multimedia services and integration of satellite network and the Internet, etc. In this paper a geostationary eart h orbit(GEO) satellite system is proposed within which packet transport and swit ching are based on IP. This system is described from its transmission net work and routin g architecture. A new idea, which is on-ground routing and on board switching, is adopted for the resource constraints of satellite. Through an on board IP sw itch, the one hop communication between two satellite terminals can be realizab le while there are a large number of terminals. A scalable concentrative routing architecture can effectively avoid large volumes of routing traffic via satelli te. Such designs make communications more efficient, at the same time the satell ite network can be seamlessly compatible with Internet.