A novel protocol for network-controlled metasurfaces

Tsioliaridou, Ageliki; Liaskos, Christos; Pitsillides, Andreas; Ioannidis, Sotiris

doi:10.1145/3109453.3109469

Cited by 17 publications

(16 citation statements)

References 20 publications

(28 reference statements)

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“…Based on these specifications, existing IoT platforms can constitute promising choices for tile gateways [1]. The sensing capabilities of existing IoT platforms may optionally facilitate the monitoring of the tile environment, such as the impinging wave power measurements, enabling the adaptive tuning of the tile functions [12].…”

Section: A the Hypersurfacementioning

confidence: 99%

“…The service forms a continuous loop with device location discovery systems: it receives the updated locations of user devices and tunes the behavior of the wireless environment accordingly. It is noted that tiles can facilitate the device location discovery process [12]. The existing user access mechanisms of the network infrastructure are executed.…”

Section: Workflow Of the Environment Configuration Servicementioning

confidence: 99%

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A New Wireless Communication Paradigm through Software-Controlled Metasurfaces

et al. 2018

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Electromagnetic waves undergo multiple uncontrollable alterations as they propagate within a wireless environment. Free space path loss, signal absorption, as well as reflections, refractions and diffractions caused by physical objects within the environment highly affect the performance of wireless communications. Currently, such effects are intractable to account for and are treated as probabilistic factors. The paper proposes a radically different approach, enabling deterministic, programmable control over the behavior of the wireless environments. The key-enabler is the so-called HyperSurface tile, a novel class of planar meta-materials which can interact with impinging electromagnetic waves in a controlled manner. The HyperSurface tiles can effectively re-engineer electromagnetic waves, including steering towards any desired direction, full absorption, polarization manipulation and more. Multiple tiles are employed to coat objects such as walls, furniture, overall, any objects in the indoor and outdoor environments. An external software service calculates and deploys the optimal interaction types per tile, to best fit the needs of communicating devices. Evaluation via simulations highlights the potential of the new concept.

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Section: A the Hypersurfacementioning

confidence: 99%

Section: Workflow Of the Environment Configuration Servicementioning

confidence: 99%

A New Wireless Communication Paradigm through Software-Controlled Metasurfaces

et al. 2018

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“…The reconfigurable metasurfaces can be made of low-cost passive elements that do not require any active power sources for transmission [53]. Their circuitry and embedded sensors can be powered with energy harvesting modules as well [32], [54]: An approach that has the potential of making them truly energy-neutral. They do not apply any sophisticated signal processing algorithms (coding, decoding, etc.…”

Section: Novelty Compared With Current Wireless Networkmentioning

confidence: 99%

Smart radio environments empowered by reconfigurable AI meta-surfaces: an idea whose time has come

Renzo

Debbah

Phan-Huy

et al. 2019

J Wireless Com Network

1,498

631

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Future wireless networks are expected to constitute a distributed intelligent wireless communications, sensing, and computing platform, which will have the challenging requirement of interconnecting the physical and digital worlds in a seamless and sustainable manner. Currently, two main factors prevent wireless network operators from building such networks: 1) the lack of control of the wireless environment, whose impact on the radio waves cannot be customized, and 2) the current operation of wireless radios, which consume a lot of power because new signals are generated whenever data has to be transmitted. In this paper, we challenge the usual "more data needs more power and emission of radio waves" status quo, and motivate that future wireless networks necessitate a smart radio environment: A transformative wireless concept, where the environmental objects are coated with artificial thin films of electromagnetic and reconfigurable material (that are referred to as intelligent reconfigurable meta-surfaces), which are capable of sensing the environment and of applying customized transformations to the radio waves. Smart radio environments have the potential to provide future wireless networks with uninterrupted wireless connectivity, and with the capability of transmitting data without generating new signals but recycling existing radio waves. We will discuss, in particular, two major types of intelligent reconfigurable meta-surfaces applied to wireless networks. The first type of meta-surfaces will be embedded into, e.g., walls, and will be directly controlled by the wireless network operators via a software controller in order to shape the radio waves for, e.g., improving the network coverage. The second type of meta-surfaces will be embedded into objects, e.g., smart t-shirts with sensors for health monitoring, and will backscatter the radio waves generated by cellular base stations in order to report their sensed data to mobile phones. These functionalities will enable wireless network operators to offer new services without the emission of additional radio waves, but by recycling those already existing for other purposes. This paper overviews the current research efforts on smart radio environments, the enabling technologies to realize them in practice, the need of new communication-theoretic models for their analysis and design, and the long-term and open research issues to be solved towards their massive deployment. In a nutshell, this paper is focused on discussing how the availability of intelligent reconfigurable meta-surfaces will allow wireless network operators to redesign common and well-known network communication paradigms.

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“…Traditional reflecting surfaces have had variety of applications in radar and satellite communications but their use in terrestrial wireless communication systems was not considered earlier as they could not adapt the induced phases with the time-varying channels that constitute the wireless propagation environments. However, recent advances in Micro-Electrical-Mechanical Systems (MEMS) and metamaterials have made real-time reconfiguration of reflecting surfaces possible using miniaturized circuits that can even be powered by energy harvesting modules, rendering the surface to be energy neutral [8], [16]. The current implementations of RIS include reflect-arrays [10] and metasurfaces comprising of software defined metamaterials [8].…”

Section: Introductionmentioning

confidence: 99%

Asymptotic Max-Min SINR Analysis of Reconfigurable Intelligent Surface Assisted MISO Systems

Nadeem

Kammoun

Chaaban

et al. 2020

IEEE Trans. Wireless Commun.

466

426

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This work focuses on the downlink of a single-cell multi-user system in which a base station (BS) equipped with M antennas communicates with K single-antenna users through a reconfigurable intelligent surface (RIS) installed in the line-of-sight (LoS) of the BS. RIS is envisioned to offer unprecedented spectral efficiency gains by utilizing N passive reflecting elements that induce phase shifts on the impinging electromagnetic waves to smartly reconfigure the signal propagation environment.We study the minimum signal-to-interference-plus-noise ratio (SINR) achieved by the optimal linear precoder (OLP), that maximizes the minimum SINR subject to a given power constraint for any given RIS phase matrix, for the cases where the LoS channel matrix between the BS and the RIS is of rank-one and of full-rank. In the former scenario, the minimum SINR achieved by the RIS-assisted link is bounded by a quantity that goes to zero with K. For the high-rank scenario, we develop accurate deterministic approximations for the parameters of the asymptotically OLP, which are then utilized to optimize the RIS phase matrix. Simulation results show that RISs can outperform half-duplex relays with a small number of passive reflecting elements while large RISs are needed to outperform full-duplex relays.

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A novel protocol for network-controlled metasurfaces

Cited by 17 publications

References 20 publications

A New Wireless Communication Paradigm through Software-Controlled Metasurfaces

A New Wireless Communication Paradigm through Software-Controlled Metasurfaces

Smart radio environments empowered by reconfigurable AI meta-surfaces: an idea whose time has come

Asymptotic Max-Min SINR Analysis of Reconfigurable Intelligent Surface Assisted MISO Systems

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