基于星座的卫星网络路由控制研究

Study on Routing Control of Satellite Networks Based on Constellation

为实现卫星网络的互联互通,需对卫星网络进行有效、合理和可靠的路由控制.从卫星网络的高度动态特性出发,考虑到卫星网络的周期性和可预见性等特点,基于卫星星座对路由选择和路由重构进行了详细地阐述.重点分析了卫星网络的路由选择,提出了适合于卫星网络的基于路由服务器的自适应备份路由方案.节点可查询存储在本地的由路由服务器预先计算的路由表,独立地进行选路.另外,路由重构可解决链路短时或长时失效带来的选路失败问题.

In order to realize the connectivity and communication of satellite networks, it′s necessary to carry out through effective, reasonable and reliable routing control. Considering the periodicity and predict ability of satellite networks, routing selection and routing reconfigure ability based on constellation is elaborated from the highly dynamic feature of satellite networks. The paper focuses on routing selection of satellite networks. A self-adaptable backup routing solution based on routing servers suitable for satellite networks is brought up. Nodes can inquire the backup routing tables pre-computed by the routing servers in local areas and choose routes independently. Additionally, routing reconfigurability can solve the problem of routing failure caused by the temporary or perpetual link fault.