Skip-Correlation for Multi-Power Wireless Carrier Sensing

Authors: 

Romil Bhardwaj, Krishna Chintalapudi, and Ramachandran Ramjee, Microsoft Research

Abstract: 

Carrier sensing is a key mechanism that enables decentralized sharing of unlicensed spectrum. However, carrier sensing in its current form is fundamentally unsuitable when devices transmit at different power levels, a scenario increasingly common given the diversity of Wi-Fi APs in the market and the need for Wi- Fi’s co-existence with new upcoming standards such as LAA/LWA. The primary contribution of this paper is a novel carrier sensing mechanism – skip correlation – that extends carrier sensing to accommodate multiple transmit power levels. Through an FPGA based implementation on the WARP platform, we demonstrate the effectiveness of our technique in a variety of scenarios including support for backward compatibility.

NSDI '17 Open Access Videos Sponsored by
King Abdullah University of Science and Technology (KAUST)

Open Access Media

USENIX is committed to Open Access to the research presented at our events. Papers and proceedings are freely available to everyone once the event begins. Any video, audio, and/or slides that are posted after the event are also free and open to everyone. Support USENIX and our commitment to Open Access.

Presentation Video

Download Video

Presentation Audio

BibTeX
@inproceedings {201461,
author = {Romil Bhardwaj and Krishna Chintalapudi and Ramachandran Ramjee},
title = {Skip-Correlation for Multi-Power Wireless Carrier Sensing},
booktitle = {14th {USENIX} Symposium on Networked Systems Design and Implementation ({NSDI} 17)},
year = {2017},
isbn = {978-1-931971-37-9},
address = {Boston, MA},
pages = {227--242},
url = {https://www.usenix.org/conference/nsdi17/technical-sessions/presentation/bhardwaj},
publisher = {{USENIX} Association},
}