Punched Cards over the Air: Cross-Technology Communication Between LTE-U/LAA and WiFi

Piotr Gawlowicz*, Anatolij Zubow, Suzan Bayhan, Adam Wolisz

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

Despite exhibiting very high theoretical data rates, in practice, the performance of LTE-U/LAA and WiFi networks is severely limited under cross-technology coexistence scenarios in the unlicensed 5GHz band. As a remedy, recent research shows the need for collaboration and coordination among colocated networks. However, enabling such collaboration requires an information exchange that is hard to realize due to completely incompatible network protocol stacks. We propose OfdmFi, the first cross-technology communication scheme that enables direct bidirectional over-the-air communication between LTE-U/LAA and WiFi with minimal overhead to their legacy transmissions. Requiring neither hardware nor firmware changes in commodity technologies, OfdmFi leverages the standard-compliant possibility of generating message-bearing power patterns, similar to punched cards from the early days of computers, in the time-frequency resource grid of an OFDM transmitter which can be cross-observed and decoded by a heterogeneous OFDM receiver. As a proof-of-concept, we have designed and implemented a prototype using commodity devices and SDR platforms. Our comprehensive evaluation reveals that OfdmFi achieves robust bidirectional CTC between both systems with a data rate of up to 84kbps, which is more than 125× faster than state-of-the-art.
Original languageEnglish
Title of host publication2020 IEEE 21st International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM)
PublisherIEEE
ISBN (Electronic)978-1-7281-7374-0
DOIs
Publication statusPublished - 9 Oct 2020
Event21st IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks, WoWMoM 2020 - Online event, Cork, Ireland
Duration: 31 Aug 20203 Sep 2020
Conference number: 21
http://www.cs.ucc.ie/wowmom2020/

Conference

Conference21st IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks, WoWMoM 2020
Abbreviated titleWOWMOM 2020
CountryIreland
CityCork
Period31/08/203/09/20
Internet address

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