PhyTraces:用物理层迹线模拟新的射频环境

Jiakang Lu, K. Whitehouse
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引用次数: 0

摘要

无线系统部署在建筑物、桥梁和森林等环境中,每一种环境都有非常不同的无线特性。在本文中,我们提出了一种在为新的射频环境创建物理层模型之前为其定制仿真的技术。我们的方法是创建物理层轨迹或PhyTraces来捕获单个节点的RF环境。然后可以用多种方式组合这些phytrace来模拟目标环境中的协议层性能。这种方法提供了一种替代传统的基于跟踪的网络模拟的方法,这种方法非常逼真,但不允许在收集跟踪之后进行协议级更改。我们证明PhyTraces可以非常快速地收集,并且可以在模拟中使用低计算开销来模拟各种大小和密度的网络。为了评估这种方法,我们在3种不同的物理环境中使用2种不同的低功率无线电在4种不同的发射功率水平下收集PhyTraces。我们的分析表明,PhyTraces可以预测实际部署中的邻居发现算法、距离矢量路由算法和泛洪算法的性能,包括由于丢包和无线碰撞导致的复杂动态的一些影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
PhyTraces: Simulating New RF Environments with Physical Layer Traces
Wireless systems are deployed in environments like buildings, bridges and forests - each of which has very different wireless properties. In this paper, we propose a technique to customize simulation for a new RF environment, before a physical layer model has been created for it. Our approach is to create physical layer traces or PhyTraces that capture the RF environment of a single node. These PhyTraces can then be composed in multiple ways to simulate protocol-layer performance in the target environment. This approach offers an alternative to conventional trace-based network simulation that is very realistic, but does not permit protocol-level changes after the traces are collected. We show that PhyTraces can be collected very quickly and can be used in simulation with low computational overhead to model networks of various sizes and densities. To evaluate this approach, we collect PhyTraces in 3 different physical environments using 2 different low-power radios at 4 different transmission power levels. Our analysis indicates that the PhyTraces can predict the performance of neighbor discovery algorithms, distance vector routing algorithms, and flooding algorithms in real deployments, including some effects of complex dynamics due to packet loss and wireless collisions.
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