Research Article
Investigation and Improvements to the OFDM Wi-Fi Physical Layer Abstraction in ns-3
@INPROCEEDINGS{10.1145/2915371.2915387, author={Hossein-Ali Safavi-Naeini and Farah Nadeem and Sumit Roy}, title={Investigation and Improvements to the OFDM Wi-Fi Physical Layer Abstraction in ns-3}, proceedings={Workshop on ns-3}, publisher={ACM}, proceedings_a={WNS3}, year={2016}, month={7}, keywords={Wi-Fi Network Simulator 3 (ns-3 )}, doi={10.1145/2915371.2915387} }- Hossein-Ali Safavi-Naeini
Farah Nadeem
Sumit Roy
Year: 2016
Investigation and Improvements to the OFDM Wi-Fi Physical Layer Abstraction in ns-3
WNS3
ACM
DOI: 10.1145/2915371.2915387
Abstract
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.