协同控制下的空间信息网络简单虚拟局域网构想

摘要

针对空间信息网的组网实现问题,考虑卫星通信网络的长时延、动态性、资源受限等网络特性,提出了一种协同控制下的虚拟局域网组网构想:首先,通过将空间信息网络划分成多个虚拟局域网的方法分割空间广域网,减轻星载计算机的信息处理负担和带宽资源的无谓损耗.其次,基于一致性算法,在协同控制律中加入路由算法实现虚拟局域网内节点卫星信息的两两联通,提高空间信息网络的可靠性和协同处理性能,将这种时变时滞协同控制律应用在空间信息网结构中能够实现空间强连通组网,应用于单个卫星上则可以实现关键节点卫星的冗余备份和负载均衡.最后,模拟仿真空间信息网框架结构和冗余节点虚拟局域网,在50 s内迅速实现预定轨迹收敛,且收敛后具有较为稳定的星间时延,从而验证了方案的可行性.%Based on long time delay,high dynamic nature,and limited resources of the satellite network, a space virtual local area network (VLAN ) division method under cooperative control was proposed to implement spatial information network. Firstly, to improve the utilization rate of satellite bandwidth and computing resources,satellite network was divided into several VLAN. Secondly, the routing algorithm was combined with consistency algorithm to achieve higher reliability in satellites' mutual connection and communication.When applied to spatial satellite network,the algorithm can achieve strong connectivity between each node;when applied to a single satellite,it can help in intra-area load balance and redundant backup. Finally, examples were given to demonstrate the effectiveness of the proposed algorithm for both space network and a single satellite.The results show that all satellites can convergence to their planned orbit in 50 seconds and the network can achieve a stable space structure.