Simulation is a common technique for the evaluation of new approaches and protocols in networked systems and provides many benefits. However, it is also well known that the relevance of the simulation results for real-world applications depends on the various models which are used within the simulation, e.g., for the characteristics of the radio communication. In this paper, we introduce the Extended Multipath Raytracing Model, an extension to the ray-tracing radio medium available in Cooja, to improve the modelling of wireless links in simulated Wireless Sensor Networks. Our extension allows the simulation of environmental influences onto links on a per node basis, allowing the analysis of various effects observed in experiments in a virtual environment. Furthermore, the packet-based modelling of transmission errors is extended to provide the simulation of bit errors, allowing new usage scenarios, like the simulation of error detection and Forward Error Correction codes in Cooja.

中文翻译：

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在包括环境影响的无线传感器网络中实现准确的误码模拟

模拟是评估网络系统中新方法和协议的常用技术，并提供许多好处。然而，众所周知，仿真结果与实际应用的相关性取决于仿真中使用的各种模型，例如无线电通信的特性。在本文中，我们介绍了扩展多路径光线跟踪模型，这是对 Cooja 中可用的光线跟踪无线电介质的扩展，以改进模拟无线传感器网络中无线链路的建模。我们的扩展允许在每个节点的基础上模拟环境对链接的影响，允许分析在虚拟环境中的实验中观察到的各种影响。此外，