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针对低轨卫星网络在对地传输时实时性不足的问题，提出了一种双层卫星网络协同的数据传输与抗毁性技术。在技术中以高轨卫星网络作为通信骨干网，负责卫星网络中数据的中继与转发，低轨卫星层则负责数据的收集和辅助路由，通过高轨卫星层与低轨卫星层的联合通信，实现了低轨卫星数据的实时传输。采用多路径传输策略，提高了卫星网络的抗毁性。通过仿真，对提出的技术在吞吐率、传输时延、时延抖动以及丢包率等方面的性能进行了分析。在遭受攻击环境下，对网络的数据交付能力变化进行了研究。多层卫星协同的数据传输方法能够很好地解决单层低轨卫星网络在数据传输方面的不足，满足卫星节点多业务的实时传输需求。
Aiming at the lack of real-time performance of LEO satellite network in the transmission to the earth, a data transmission and survivability technology of double-layer satellite network is proposed. In the technology, the high-orbit satellite network is used as the communications backbone, which is responsible for relaying and forwarding data in the satellite network. The low-orbit satellite layer is responsible for data collection and auxiliary routing. Through the joint communications between the high-altitude orbit satellite layer and the low- , Real-time transmission of LEO satellite data was achieved. Multi-path transmission strategy to improve the survivability of satellite networks. Through the simulation, the performance of the proposed technology in terms of throughput, transmission delay, delay jitter and packet loss rate were analyzed. In the attack environment, the network data delivery capability has been studied. The multi-layer satellite coordinated data transmission method can well solve the shortcomings of single-layer low-earth satellite network in data transmission and meet the real-time transmission needs of multi-service satellite nodes.