This paper presents the design and architecture of a network emulator whose links' parameters (such as delay and bandwidth) vary at different time instances. The emulator is used as a digital twin for satellite communication systems, in order to test and evaluate novel solutions before their final deployment. To achieve such a goal, different existing technologies are carefully combined to emulate link dynamicity, automatic traffic generation, and overall topology emulation. Since emulating asymmetric dynamic links (as required in satellite communications) is far from trivial, we provide a detailed design architecture for solving such task. Experimental results show the precision of our dynamic assignments and the overall flexibility of the proposed solution.

翻译：本文件介绍了网络模拟器的设计和结构,其链接参数(如延迟和带宽)在不同时间的情况中各不相同。模拟器被用作卫星通信系统的数字双胞胎,以便在最后部署之前测试和评价新的解决办法。为了实现这一目标,将不同的现有技术仔细结合,以效仿链接动态、自动交通生成和总体地形模拟。由于模拟不对称动态链接(如卫星通信所要求的)远非微不足道,我们为完成这种任务提供了详细的设计架构。实验结果显示我们动态任务精确度以及拟议解决办法的总体灵活性。