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针对目前在星地信息传输中全局路由规划不合理及其引起的传输大时延等问题,通过考虑星地资源的优化利用及地面网络拥塞状态,提出全局优化技术给出较佳的路由策略。根据一体化的全局规划方案及树形搜索算法,由于考虑了卫星与接收站的资源可利用状态和整个地面网络的通信负载状态,建立符合实际需求的一体化路由规划模型。仿真结果表明,给出较佳的一体化传输路由,保证从卫星到接收站到处理中心能进行实时的信息传输。证明建立的模型能得出次优的规划方案,可在网络突发状况下应急使用,具有较强的适应能力。
Aiming at the problems such as the unreasonable global routing planning in star information transmission and the large transmission delay caused by satellite routing, the global optimization technology is proposed to give a better routing strategy by considering the optimal utilization of satellite resources and the congestion status of terrestrial networks. According to the integrated global planning scheme and the tree search algorithm, an integrated route planning model that meets the actual needs is established due to the availability of resources of the satellite and the receiving station and the communication load status of the entire terrestrial network. The simulation results show that the proposed integrated transmission routing, to ensure that from the satellite to the receiving station to the processing center for real-time information transmission. Proved that the model can be built to make suboptimal planning program, which can be used urgently under the condition of network emergency and has strong adaptability.