Subventions et des contributions :

Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier (2017-2018 à 2018-2019).

Current wireless communications of data rely on two competing technologies: Long-Term-Evolution (LTE),x000D
which is used in today's cellular networks, and Wi-Fi which is used in home Internet routers. LTE cellularx000D
systems are characterized by dedicated controlled spectrum access leading to Quality-of-Service~(QoS)x000D
guarantees such as data throughput and ubiquitous connectivity; these are, however, at a premium fee to thex000D
user. Wi-Fi, on the other hand, relies on random access of freely-available radio spectrum, but with no QoSx000D
guarantees. Hence, while Wi-Fi deployment at large will enable cost-effective communication, it willx000D
potentially result in considerable interference with existing LTE infrastructure, leading to compromisedx000D
performance. From a complementary perspective, LTE service cellular providers have been progressivelyx000D
cognizant of the ample spectrum available in the unlicensed bands. An LTE variant that will use such bands isx000D
the license-assisted access (LAA); LAA uses downlink transmissions in the unlicensed band and uplinkx000D
transmissions in the licensed ones. Hence, LTE and Wi-Fi will co-exist within the same frequency bands.x000D
The objective of the current project is to focus on co-existence from the Wi-Fi side. In particular, this projectx000D
will examine different Wi-Fi product implementations by various manufacturers. This will enable optimizingx000D
deployment and management of Wi-Fi networks. This research will generate insight into how real Wi-Fix000D
products deviate from theoretical requirements described in the 802.11 standard. In foresight, our research planx000D
will contribute to establishing recommendations for forthcoming Wi-Fi and LAA co-existence. To achieve thisx000D
goal, we will rely on real-time flexible wireless hardware that can be used to realize the Wi-Fi standard. Such ax000D
hardware is provided by Universal Software-Defined Radio Peripherals (USRPs), which can be configured viax000D
software suites that enable the developer/researcher to control the key parameters that govern performancex000D
and interference.