Simultaneous Wireless Information and Power Transfer at 5G New Frequencies: Channel Measurement and Network Design

Abstract

Simultaneous wireless information and power transfer (SWIPT) technique offers a potential solution to ease the contradiction between high data rate and long standby time in the fifth generation (5G) mobile communication systems. In this paper, we focus on the SWIPT network design and optimization with 5G new frequencies. To design an efficient SWIPT network, we first investigate the propagation properties of 5G low-frequency (LF) and high-frequency (HF) channels. Specifically, a measurement campaign focusing on 3.5 GHz and 28 GHz is conducted in both outdoor and outdoor-to-indoor scenarios. Motivated by the measurement results, we design a dual-band SWIPT network, where the HF band is used for short-distance information delivery, while the LF band is used for short-distance energy transfer and long-distance information delivery. The designed network has a win-win architecture that can enhance the throughput of cell-edge users and improve the energy-harvesting efficiency of cell-center users. To further boost the network performance, we devise a joint power-and-channel allocation algorithm, which has the advantages of low complexity and fast convergence. Finally, simulation results demonstrate that the designed dual-band network outperforms the conventional single-band network in terms of energy-harvesting efficiency and user fairness, and the proposed algorithm can further upgrade the network performance significantly. Index Terms-Simultaneous wireless information and power transfer, 5G new frequency, channel measurement, network design, resource allocation.

A Survey on Non-Orthogonal Multiple Access: From the Perspective of Spectral Efficiency and Energy Efficiency

“…Then, a new paradigm of SWIPT was proposed for green wireless communications to simultaneously consider the SE and EE [123]. Accordingly, NOMA-based systems assisted by SWIPT were investigated to further improve the system performance [124,125], particularly under the framework of power consumption minimization with minimum data rate requirement. The authors in [126] proposed a SWIPT NOMA system by modifying the power splitting scheme to improve the EE, while the optimization of resource and power allocation under limited energy supply was developed in [127] for heterogeneous networks.…”

Monitoring for Rare Events in a Wireless Powered Communication mmWave Sensor Network

“…The work in [ 6 ] considered a SWIPT scheme in massive MIMO–NOMA systems, to achieve the optimal trade-off between spectrum and energy efficiency. The work in [ 7 ] studied the performance of SWIPT with 5G frequencies at 3.5 and 28 GHz and proposed an architecture that increases the throughput of cell-edge users and improves the energy-harvesting efficiency of cell-center users. On the performance of SWIPT schemes for mm-wave communication systems, the authors of [ 10 ] considered two channel models to accurately model the signal propagation process in mm-wave bands, namely, two-wave with diffused power and fluctuating two-ray.…”

“…Radio frequency (RF) WPT, on the other hand, supports relatively long transmission ranges, suitable for IoT devices, such as wireless power sensors, located in a dense area. However, to efficiently charge wirelessly, via RF WPT, a wireless power sensor network, the design of access point (AP) antennas is crucial [ 4 , 5 , 6 , 7 ]. Millimeter wave (mmWave) antenna design can provide the required high gains and is suitable for dense network topologies of a few meters.…”

Simultaneous Power Harvesting and Cyclostationary Spectrum Sensing in Cognitive Radios

“…Regarding limited battery capacity, the wireless power transfer (WPT) technique is suitable for charging the battery [3]. Another promising technique is to harvest power directly from the radio frequency (RF) electromagnetic waves coming from dedicated wireless energy sources that transmit a known amount of energy at specific locations and times, together with the usual information signals by simultaneous wireless information and power transfer (SWIPT) [4], [5]. In general, it is not possible to perform energy harvesting (EH) and information decoding (ID) operations on the same received signal in a SWIPT system, as the EH operation on the RF signal destroys the information content of the signal.…”