高速因特网中含卫星单向链路的路由研究

由于多数卫星地面站只具有接收能力而形成了单向链路,无法应用现有的路由协议.为了解决含有卫星单向链路的路由问题,首先针对卫星直播系统的拓扑结构建立了网络模型,并在简化模型的基础上提出了基于环路发现的链路状态路由算法和一种基于服务器的协议--SERP(sever-based routing protocol).通过证明路由算法的收敛性,并利用Network Simulator工具对协议进行仿真的结果,得出SERP的正确性和具有协议开销小的特点,可用以支持在高速因特网中集成宽带卫星网络的动态路由.

Research on Integrating Satellite Unidirectional Links with High Speed Internet

Unidirectional links brought by many receive-only stations are not suitable for current routing protocols. To solve the unidirectional routing problem, a network model is built for the topology of direct broadcast systems. By simplifying the network model, a link state routing algorithm based on circle discovery and a new protocol SERP (sever-based routing protocol) are proposed. By means of proven convergency of the routing algorithm and simulating results from network simulator tool for the protocol, the correctness of SERP is verified,which has fewer ovwer overheads and supports dynamic routing for integrating broadband satellite networks with high spped Interet.