RIS-Assisted UAV for Timely Data Collection in IoT Networks

no code implementations • 31 Mar 2021 • Ahmed Al-Hilo, Moataz Samir, Mohamed Elhattab, Chadi Assi, Sanaa Sharafeddine

This integrated problem brings challenges related to the configuration of the phase shift elements of the RIS, the scheduling of IoTDs transmissions as well as the trajectory of the UAV.

Decision Making Edge-computing +2

Age of Information Optimization in a RIS-Assisted Wireless Network

no code implementations • 11 Mar 2021 • Ali Muhammad, Mohamed Elhattab, Mohamed Amine Arfaoui, Ahmed Al-Hilo, Chadi Assi

To circumvent the high-coupled optimization variables, and with the aid of bilevel optimization, we decompose the original problem into an outer traffic stream scheduling problem and an inner RIS phase-shift matrix problem.

Bilevel Optimization Edge-computing +1

Reconfigurable Intelligent Surface Enabled Vehicular Communication: Joint User Scheduling and Passive Beamforming

no code implementations • 28 Jan 2021 • Ahmed Al-Hilo, Moataz Samir, Mohamed Elhattab, Chadi Assi, Sanaa Sharafeddine

Therefore, the joint problem of RSU resource scheduling and RIS passive beamforming or phase-shift matrix is formulated as an optimization problem with the objective of maximizing the minimum average bit rate.

Scheduling