Relay-Aided Outdoor-to-Indoor Communication in Millimeter-Wave Cellular Networks

Ntontin, Konstantinos; Verikoukis, Christos

doi:10.1109/jsyst.2019.2939745

Cited by 23 publications

(18 citation statements)

References 31 publications

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“…Content may change prior to final publication. Similar to the analysis in [46], the SIR coverage probability in (5) becomes…”

Section: Discussionmentioning

confidence: 88%

“…The Asia-Pacific region is supposed to give rise to the greatest share of the total contribution of mmWave communications to the gross domestic product (GDP), i.e., $212 billion, over the period 2020 to 2034 [1]; with a compound annual growth rate of 31% in the volume of mobile data traffic [2]. These significant growths imply that within the next decades, mmWave cellular networks will have significantly drawn attention to deliver much higher data-rate and capacity compared to current levels due to the availability of wider bandwidths [3]- [5].…”

Section: Introductionmentioning

confidence: 99%

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RIS-Assisted Coverage Enhancement in Millimeter-Wave Cellular Networks

2020

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The use of millimeter-wave (mmWave) bandwidth is one key enabler to achieve the high data rates in the fifth-generation (5G) cellular systems. However, mmWave signals suffer from significant path loss due to high directivity and sensitivity to blockages, limiting its adoption within small-scale deployments. To enhance the coverage of mmWave communication in 5G and beyond, it is promising to deploy a large number of reconfigurable intelligent surfaces (RISs) that passively reflect mmWave signals towards desired directions. With this motivation, in this work, we study the coverage of an RIS-assisted large-scale mmWave cellular network using stochastic geometry, and derive the peak reflection power expression of an RIS and the downlink signal-to-interference ratio (SIR) coverage expression in closed forms. These analytic results clarify the effectiveness of deploying RISs in the mmWave SIR coverage enhancement, while unveiling the major role of the density ratio between active base stations (BSs) and passive RISs. Furthermore, the results show that deploying passive reflectors are as effective as equipping BSs with more active antennas in the mmWave coverage enhancement. Simulation results confirm the tightness of the closed-form expressions, corroborating our major findings based on the derived expressions.INDEX TERMS Millimeter-wave (mmWave), reconfigurable intelligent surface (RIS), coverage, signalto-interference ratio (SIR), stochastic geometry.

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“…Content may change prior to final publication. Similar to the analysis in [46], the SIR coverage probability in (5) becomes…”

Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

RIS-Assisted Coverage Enhancement in Millimeter-Wave Cellular Networks

2020

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“…In the academia and industry, the potential proposed solution for O2I communication is relay-aided systems [29], [30]. As shown in Fig.…”

Section: Relaymentioning

confidence: 99%

Modeling RIS Empowered Outdoor-to-Indoor Communication in mmWave Cellular Networks

Nemati,

Maham,

Pokhrel

et al. 2021

Preprint

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With the increasing adoption of millimeter-waves (mmWave) over cellular networks, outdoor-to-indoor (O2I) communication has been one of the challenging research problems due to high penetration loss of buildings. To address this, we investigate the practicability of utilizing reconfigurable intelligent surfaces (RISs) for assisting such O2I communication. We propose a new notion of prefabricated RIS-empowered wall consisting of a large number of chipless radio frequency identification (RFID) sensors. Each sensor maintains its own bank of delay lines. These sensors which are built within the building walls can potentially be controlled by a main integrated circuit (IC) to regulate the phase of impinging signals. To evaluate our idea, we develop a thorough performance analysis of the RIS-based O2I communication in the mmWave network using stochasticgeometry tools for blockage models. Our analysis facilitates two closed-form approximations of the downlink signal-to-noise ratio (SNR) coverage probability for RIS-based O2I communication. We perform extensive simulations to evaluate the accuracy of the derived expressions, thus providing new observations and findings.

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“…Given the blockage sensitivity and the high path loss of mm-wave communications, relays can represent a powerful tool. Specifically, relays can be used to decrease communication interruptions by providing alternative LOS paths [67,70,71,72], or to overcome the severe penetration loss for outdoor-indoor communications [73]. When the relay is fixed, a proper relay placement is crucial to provide LOS links between the relay and the destination and the Tx nodes.…”

Section: Relaying Technologymentioning

confidence: 99%