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.

中文翻译：

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用于评估新解决方案的卫星通信数字孪生：动态链路仿真架构

本文介绍了一个网络仿真器的设计和体系结构，其链路参数（如延迟和带宽）在不同的时间实例中会发生变化。该模拟器用作卫星通信系统的数字孪生，以便在最终部署之前测试和评估新的解决方案。为了实现这样的目标，不同的现有技术被精心组合以模拟链路动态、自动流量生成和整体拓扑模拟。由于模拟非对称动态链路（如卫星通信中所要求的）远非微不足道，我们提供了解决此类任务的详细设计架构。实验结果显示了我们动态分配的精度和所提出解决方案的整体灵活性。