Investigation and Improvements to the OFDM Wi-Fi Physical Layer Abstraction in ns-3
Investigation and Improvements to the OFDM Wi-Fi Physical Layer Abstraction in ns-3
复制标题
ns-3 中 OFDM Wi-Fi 物理层抽象的研究和改进
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Roy
中科院分区：
文献类型：
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作者：
Hossein;Farah Nadeem;S. Roy
这项工作提出的结果基于对 ns-3 网络模拟器中 IEEE 802.11 OFDM WLAN 的当前物理层抽象的关键重新检查，其动机是 a) 需要提高网络级模拟器所必需的第 1 层抽象的保真度，b) 为未来所需的新功能（当前未实现）奠定基础。我们实现了多级数据包接收，解决了当前 WLAN 接收器模型的缺陷，使其更接近现有硬件，并为数据包捕获等改进奠定了基础。接下来，我们考虑 ns-3 中的帧错误率 (FER) 模型，该模型依赖于卷积解码器输出处的误码概率 (BER) 的分析界限。我们通过使用新开发的 Wi-Fi 链路模拟器进行详细的链路级模拟来演示当前方法的关键问题，并期待即将考虑的修复。
This work presents results based on a critical re-examination of the current physical layer abstractions for IEEE 802.11 OFDM WLAN in the ns-3 network simulator motivated by a) the need to improve fidelity of the Layer-1 abstraction essential for a network level simulator, and b) setting the stage for desired new features (not currently implemented) in the future. We implement a multi-stage packet reception that addresses a shortcoming in the current WLAN receiver model, making it closer to existing hardware, and lays the groundwork for improvements such as packet capture. Next, we consider the frame error rate (FER) model in ns-3 which relies on analytical bounds on the bit error probability (BER) at the output of the convolutional decoder. We demonstrate key issues with the current approach through detailed link level simulations using a newly developed Wi-Fi link simulator and look forward to forthcoming fixes being considered.