Power Beacon Energy Consumption Minimization in Wireless Powered Backscatter Communication Networks

by   Haohang Yang, et al.

Internet-of-Things (IoT) networks are expected to support the wireless connection of massive energy limited IoT nodes. The emerging wireless powered backscatter communications (WPBC) enable IoT nodes to harvest energy from the incident radio frequency signals transmitted by a power beacon (PB) to support their circuit operation, but the energy consumption of the PB (a potentially high cost borne by the network operator) has not been sufficiently studied for WPBC. In this paper, we aim to minimize the energy consumption of the PB while satisfying the throughput requirement per IoT node by jointly optimizing the time division multiple access (TDMA) time slot duration and backscatter reflection coefficient of each IoT node and the PB transmit power per time slot. As the formulated joint optimization problem is non-convex, we transform it into a convex problem by using auxiliary variables, then employ the Lagrange dual method to obtain the optimal solutions. To reduce the implementation complexity required for adjusting the PB's transmit power every time slot, we keep the PB transmit power constant in each time block and solve the corresponding PB energy consumption minimization problem by using auxiliary variables, the block coordinated decent method and the successive convex approximation technique. Based on the above solutions, two iterative algorithms are proposed for the dynamic PB transmit power scheme and the static PB transmit power scheme. The simulation results show that the dynamic PB transmit power scheme and the static PB transmit power scheme both achieve a lower PB energy consumption than the benchmark schemes, and the former achieves the lowest PB energy consumption.


Spectral and Energy Efficient Wireless Powered IoT Networks: NOMA or TDMA?

Wireless powered communication networks (WPCNs), where multiple energy-l...

Many a little Makes a Mickle: Probing Backscattering Energy Recycling for Backscatter Communications

In this paper, we investigate and analyze full-duplex-based backscatter ...

Cross-layer based intermittent jamming schemes for securing energy-constraint networks

The Internet-of-Things (IoT) emerges as a paradigm to achieve ubiquitous...

3D Wireless Channel Modeling for Multi-layer Network on Chip

The resource constraints and accuracy requirements for Internet of Thing...

On the Bound of Energy Consumption in Cellular IoT Networks

Billions of sensors are expected to be connected to the Internet through...

Signal power and energy-per-bit optimization problems in systems mMTC

Currently, the issues of the operation of the Internet of Things technol...

A Hybrid Approach for Efficient Wireless Information and Power Transfer in Green C-RAN

In this paper, we consider a green cloud radio access network (C-RAN) wi...

Please sign up or login with your details

Forgot password? Click here to reset