On Energy Allocation and Data Scheduling in Backscatter Networks With Multi-Antenna Readers
Journal article, 2021
In this paper, we study the throughput utility functions in buffer-equipped monostatic backscatter communication networks with multi-antenna Readers. In the considered model, the backscatter nodes (BNs) store the data in their buffers before transmission to the Reader. We investigate three utility functions, namely, the sum, the proportional and the common throughput. We design online admission policies, corresponding to each utility function, to determine how much data can be admitted in the buffers. Moreover, we propose an online data link control policy for jointly controlling the transmit and receive beamforming vectors as well as the reflection coefficients of the BNs. The proposed policies for data admission and data link control jointly optimize the throughput utility, while stabilizing the buffers. We adopt the min-drift-plus-penalty (MDPP) method in designing the control policies. Following the MDPP method, we cast the optimal data link control and the data admission policies as solutions of two independent optimization problems which should be solved in each time slot. The optimization problem corresponding to the data link control is non-convex and does not have a trivial solution. Using Lagrangian dual and quadratic transforms, we find a closed-form iterative solution. Finally, we use the results on the achievable rates of finite blocklength codes to study the system performance in the cases with short packets. As demonstrated, the proposed policies achieve optimal utility and stabilize the data buffers in the BNs.
green communications
Buffer storage
finite blocklength analysis
Backscatter
Impedance
Lyapunov optimization
Array signal processing
proportional throughput
radio frequency identification
energy harvesting
Backscatter communication
sum throughput
min-drift-plus-penalty
Internet of Things
Downlink
wireless energy transfer
max-min throughput
Throughput
fairness
Internet of Things
Author
Mohammad Movahednasab
Sharif University of Technology
Mohammad Reza Pakravan
Sharif University of Technology
Behrooz Makki
Ericsson
Tommy Svensson
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
IEEE Open Journal of the Communications Society
2644125X (eISSN)
Vol. 2 1674-1689Subject Categories
Telecommunications
Communication Systems
Control Engineering
DOI
10.1109/OJCOMS.2021.3094759