Abstract: In view of the large scale and diverse protocols of space-ground integrated network, it is necessary to build a corresponding emulation platform for rigorous evaluation and verification. In order to overcome shortcomings of the existing emulation technologies of satellite links, dynamic differential compensation and random number algorithms are used to realize high-fidelity emulation of satellite link delay and data packet loss rate respectively. High-throughput routing emulation technology is adopted to improve the throughput of space-based backbone links. An emulation scenario, which including six space-based backbone nodes and sixty-six space-based access nodes, is constructed. Based on this scenario, satellite link delays, data packet loss rates, and satellite network throughputs are tested. Comparing to the traditional methods, the proposed method has advantages of high fidelity and high throughput.

Key words: space-ground integration, satellite link, high fidelity, high throughput, differential compensation

摘要： 天地一体化网络规模庞大且协议多样，必须构建相应的仿真平台进行严格的评估和验证。针对主流卫星链路仿真逼真度与吞吐量不足的缺点，分别采用动态差分补偿和随机数算法实现卫星链路延时、数据分组丢失率的高逼真仿真；采用高通量路由仿真技术，提升天基骨干网间链路的吞吐量。构建了涵盖6颗天基骨干节点、66颗天基接入节点的天地一体化网络仿真场景，并对卫星链路延时、数据分组丢失率及卫星网络的吞吐量进行测试，相对于传统方法，仿真的卫星链路不仅具有高逼真性，而且具有高通量优势。

关键词: 天地一体化, 卫星链路, 高逼真, 高通量, 差分补偿