Backscatter-Assisted Wireless Powered Communication Networks Empowered by Intelligent Reflecting Surface

04/26/2021
by   Parisa Ramezani, et al.
0

Intelligent reflecting surface (IRS) has recently been emerged as an effective way for improving the performance of wireless networks by reconfiguring the propagation environment through a large number of passive reflecting elements. This game-changing technology is especially important for stepping into the Internet of Everything (IoE) era, where high performance is demanded with very limited available resources. In this paper, we study a backscatter-assisted wireless powered communication network (BS-WPCN), in which a number of energy-constrained users, powered by a power station (PS), transmit information to an access point (AP) via backscatter and active wireless information transfer, with their communication being aided by an IRS. Using a practical energy harvesting (EH) model which is able to capture the characteristics of realistic energy harvesters, we investigate the maximization of total network throughput. Specifically, IRS reflection coefficients, PS transmit and AP receive beamforming vectors, power and time allocation are designed through a two-stage algorithm, assuming minimum mean square error (MMSE) receiver at the AP. The effectiveness of the proposed algorithm is confirmed via extensive numerical simulations. We also show that our proposed scheme is readily applicable to practical IRS-aided networks with discrete phase shift values.

READ FULL TEXT
research
10/06/2018

Intelligent Reflecting Surface Enhanced Wireless Network via Joint Active and Passive Beamforming

Intelligent reflecting surface (IRS) is envisioned to be a new and revol...
research
08/25/2021

Designing Wireless Powered Networks assisted by Intelligent Reflecting Surfaces with Mechanical Tilt

In this paper, we propose a fairness-aware rate maximization scheme for ...
research
07/19/2020

Throughput Optimization of Intelligent Reflecting Surface Assisted User Cooperation in WPCNs

Intelligent reflecting surface (IRS) can effectively enhance the energy ...
research
01/05/2023

Sum-Rate Maximization in Active RIS-Assisted Multi-Antenna WPCN

In this paper, we propose an active reconfigurable intelligent surface (...
research
08/03/2020

Dynamic Network Service Selection in IRS-Assisted Wireless Networks: A Game Theory Approach

In this letter, we investigate the dynamic network service provider (SP)...
research
12/27/2022

Hierarchical Deep Reinforcement Learning for Age-of-Information Minimization in IRS-aided and Wireless-powered Wireless Networks

In this paper, we focus on a wireless-powered sensor network coordinated...
research
02/17/2021

Intelligent Reflecting Surface Aided Wireless Energy Transfer and Mobile Edge Computing for Public Transport Vehicles

In the forthcoming 6G era, Future Public transport vehicles (F-PTV), suc...

Please sign up or login with your details

Forgot password? Click here to reset