卫星网络路由器高速数据转发设计

卫星网络由多颗卫星和地面站组成,星间通过高速激光链路通信。卫星网络的核心之一就是路由器。高性能路由器的典型特点为数据路径和控制路径的分离。控制路径处理与高层路由协议相关的数据包,数据路径处理需要转发的数据包。数据路径是路由器的关键路径,直接影响着路由器的整体性能。在调研路由器技术发展历程之后,分析了高性能路由器典型结构及相关关键技术,考虑目前卫星网络系统需求、软硬件环境约束条件,对现有技术进行了优化和适应性修改,确定了卫星网络路由器中数据路径的实现方案。该方案满足当前卫星网络应用需求,且经简单扩展后,还可满足后续更高性能卫星网络路由器的设计需求。

A Design of High-Speed Data Forwarding for Router of Satellite Network

The satellite network consists of several satellites and ground stations. The satellites communicate with each other through high-speed laser links. One of the core components of the satellite network is the routers. A typical feature of high performance routers is the separation of the data paths and the control paths. The control paths process data packets of the high-level routing protocol, the data paths process the data packets that need to be forwarded, and the data forwarding of different interfaces is performed independently. The critical paths of the routers are the data paths which affect the overall performance of the routers directly. After investigating the development history of the router technology, we discussed the typical structure and the key technologies of high-performance routers. Considering the requirements of the current satellite network system and the constraints of software and hardware environment, we have optimized the existing technology adaptively and confirmed the implementation method of the data paths of the satellite network router. The scheme meet the present requirements of satellite network, it can also meet the design requirements of subsequent high-performance routers After simple expansion.