Integrated Data and Energy Communication Network: A Comprehensive Survey

Abstract

In order to satisfy the power thirsty of communication devices in the imminent 5G era, wireless charging techniques have attracted much attention both from the academic and industrial communities. Although the inductive coupling and magnetic resonance based charging techniques are indeed capable of supplying energy in a wireless manner, they tend to restrict the freedom of movement. By contrast, RF signals are capable of supplying energy over distances, which are gradually inclining closer to our ultimate goal -charging anytime and anywhere. Furthermore, transmitters capable of emitting RF signals have been widely deployed, such as TV towers, cellular base stations and Wi-Fi access points. This communication infrastructure may indeed be employed also for wireless energy transfer (WET). Therefore, no extra investment in dedicated WET infrastructure is required. However, allowing RF signal based WET may impair the wireless information transfer (WIT) operating in the same spectrum. Hence, it is crucial to coordinate and balance WET and WIT for simultaneous wireless information and power transfer (SWIPT), which evolves to Integrated Data and Energy communication Networks (IDENs). To this end, a ubiquitous IDEN architecture is introduced by summarising its natural heterogeneity and by synthesising a diverse range of integrated WET and WIT scenarios. Then the inherent relationship between WET and WIT is revealed from an information theoretical perspective, which is followed by the critical appraisal of the hardware enabling techniques extracting energy from RF signals. Furthermore, the transceiver design, resource allocation and user scheduling as well as networking aspects are elaborated on. In a nutshell, this treatise can be used as a handbook for researchers and engineers, who are interested in enriching their knowledge base of IDENs and in putting this vision into practice.Index Terms-RF signals, wireless energy transfer (WET), wireless information transfer (WIT), simultaneous wireless information and power transfer (SWIPT), wireless powered communication networks (WPCNs), integrated data and energy communication networks (IDENs).an increasing research interest from both the electronic and communication engineering communities. C. Near-field Wireless Energy TransferAt the time of writing, resonant inductive coupling [35] and magnetic resonance coupling [36] emerge as flexible wireless charging options for electronic devices in the nearfield. Resonant inductive coupling based wireless charging relies on the magnetic coupling that delivers electrical energy between two coils tuned to resonate at the same frequency. This technique has already been commercialised for small electronic appliances [37], such as mobile phones, electric toothbrushes and smart watches etc. However, the coupling coils only support near-field wireless power transfer over a distance spanning from a few millimetres to a few centimetres [38], while achieving a power transfer efficiency as high as 56.7%, when operating at a frequency of 508 kHz [...

Joint Interleaver and Modulation Design For Multi-User SWIPT-NOMA

“…Furthermore, in order to alleviate their energy shortage, radio frequency (RF) signal based wireless power transfer (WPT) can be relied upon for remotely charging these batterypowered IoT devices [9]. However, coordinating the conventional wireless information transfer (WIT) and the wireless power transfer (WPT) in the same RF band is a challenging task, which thus stimulates substantial research interest in the topic of simultaneous wireless information and power transfer (SWIPT) [10]. In a SWIPT systems, the simultaneous reception of both the information and energy is realised by invoking a signal splitter at the receiver, which is capable of splitting the received RF signal either in the time-domain [11], or in the power-domain [12] or in the spatial domain [13].…”

Transmitter-Side Wireless Information- and Power-Transfer in Massive MIMO Systems

“…Next, we find the following inner approximation of the power constraint (8b) by using (21): (10). (11) Algorithm 1 summarizes the associated computational procedure, which iteratively solves the convex problem (11).…”

“…Hence WPT relying on massive multipleinput-multiple-output (m-MIMO) systems has been considered in the specific contexts of both space-division multiple access (SDMA) [3]- [5] as well as in power splitting (PS) [6]- [8] and time switching (TS) [9]. The SDMA solution relies on the transfer of energy and information over different beam directions [10]. In the PS approach, information and energy are simultaneously transmitted using the same signal by the BS.…”

Modulation and Coding Design for Simultaneous Wireless Information and Power Transfer

“…A typical SWIPT receiver is portrayed in the bottom half of Fig.1, which is constituted by the receive beamformer, the signal splitter, the WPT receiver and the WIT receiver. Either the power-splitter or the time-switcher is exploited for splitting the received RF signal into two portions [8]. A portion of the received RF signal flows into the WIT receiver for the demodulation and decoding.…”