Literature Database Entry

gawowicz2023matryoshka


Piotr Gawłowicz, Anatolij Zubow and Falko Dressler, "Matryoshka: Single RF Chain Multi-user Transmission through WiFi-in-WiFi Signal Emulation using COTS Hardware," Proceedings of 29th ACM International Conference on Mobile Computing and Networking (MobiCom 2023), 17th ACM International Workshop on Wireless Network Testbeds, Experimental evaluation and Characterization (WINTECH 2023), Madrid, Spain, October 2023, pp. 96–103.


Abstract

We see a trend toward serving Internet of Things (IoT) devices using the IEEE 802.11 protocol in order to offer cost-effective solutions. However, a WiFi AP serving simultaneously both broadband and IoT applications suffers from performance degradation as the slow IoT devices operating on a low modulation and coding throttle down the high-speed broadband devices like TVs or laptops. In this paper, we present Matryoshka, an approach that exploits the signal emulation technique developed in the context of cross-technology communication to create multi-user transmissions from a SISO WiFi AP in the downlink. With such emulated multi-user transmissions, which is a form of hierarchical modulation, it is possible to simultaneously serve a high-speed 802.11 station together with a slow-speed station, which is more efficient than serving them one after another in the time domain. Our approach is a software solution and works with commodity WiFi hardware. For the slow-speed stations our approach is fully transparent whereas it requires some post-processing at the high-speed station side. Our evaluation results reveal that Matryoshka outperforms the classical approach as the overhead in the channel access and overhead from the PHY preamble for the IoT transmissions can be fully avoided. Experimental results from our prototype show the practical feasibility. However, benefits of Matryoshka go well beyond. The concept of stacking multiple more narrow WiFi channels into wider ones promises wide applicability to reduce the air time of multiple packets.

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Piotr Gawłowicz
Anatolij Zubow
Falko Dressler

BibTeX reference

@inproceedings{gawowicz2023matryoshka,
    author = {Gawłowicz, Piotr and Zubow, Anatolij and Dressler, Falko},
    doi = {10.1145/3615453.3616508},
    title = {{Matryoshka: Single RF Chain Multi-user Transmission through WiFi-in-WiFi Signal Emulation using COTS Hardware}},
    pages = {96--103},
    publisher = {ACM},
    isbn = {978-1-4503-9990-6},
    address = {Madrid, Spain},
    booktitle = {29th ACM International Conference on Mobile Computing and Networking (MobiCom 2023), 17th ACM International Workshop on Wireless Network Testbeds, Experimental evaluation and Characterization (WINTECH 2023)},
    month = {10},
    year = {2023},
   }
   
   

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Last modified: 2024-07-21