Towards Environmental RF-EMF Assessment of mmWave High-Node Density Complex Heterogeneous Environments.

PAPER pubmed Sensors (Basel, Switzerland) 2021 Exposure assessment Effect: no_effect Evidence: Insufficient

Read original paper → DOI: 10.3390/s21248419 PMID: 34960513 Evidence Lab

Abstract

The densification of multiple wireless communication systems that coexist nowadays, as well as the 5G new generation cellular systems advent towards the millimeter wave (mmWave) frequency range, give rise to complex context-aware scenarios with high-node density heterogeneous networks. In this work, a radiofrequency electromagnetic field (RF-EMF) exposure assessment from an empirical and modeling approach for a large, complex indoor setting with high node density and traffic is presented. For that purpose, an intensive and comprehensive in-depth RF-EMF E-field characterization study is provided in a public library study case, considering dense personal mobile communications (5G FR2 @28 GHz) and wireless 802.11ay (@60 GHz) data access services on the mmWave frequency range. By means of an enhanced in-house deterministic 3D ray launching (3D-RL) simulation tool for RF-EMF exposure assessment, different complex heterogenous scenarios of high complexity are assessed in realistic operation conditions, considering different user distributions and densities. The use of directive antennas and MIMO beamforming techniques, as well as all the corresponding features in terms of radio wave propagation, such as the body shielding effect, dispersive material properties of obstacles, the impact of the distribution of scatterers and the associated electromagnetic propagation phenomena, are considered for simulation. Discussion regarding the contribution and impact of the coexistence of multiple heterogeneous networks and services is presented, verifying compliance with the current established international regulation limits with exposure levels far below the aforementioned limits. Finally, the proposed simulation technique is validated with a complete empirical campaign of measurements, showing good agreement. In consequence, the obtained datasets and simulation estimations, along with the proposed RF-EMF simulation tool, could be a reference approach for the design, deployment and exposure assessment of the current and future wireless communication technologies on the mmWave spectrum, where massive high-node density heterogeneous networks are expected.

AI evidence extraction

At a glance

Study type

Exposure assessment

Effect direction

no_effect

Population

—

Sample size

—

Exposure

mmWave 5G FR2 and Wi-Fi (802.11ay) in an indoor public library

Evidence strength

Insufficient

Confidence: 78% · Peer-reviewed: yes

Main findings

An empirical and modeling RF-EMF exposure assessment was conducted in a public library scenario including dense 5G FR2 (28 GHz) and 802.11ay (60 GHz) services. The authors report exposure levels far below current international regulation limits, and the proposed deterministic 3D ray launching simulation showed good agreement with an empirical measurement campaign.

Outcomes measured

RF-EMF E-field characterization in a complex indoor high-node density environment
Comparison of simulated vs measured RF-EMF exposure (validation of 3D ray launching tool)
Compliance with international exposure limits

Suggested hubs

5g-policy (0.6)
Assesses RF-EMF exposure in 5G FR2 (mmWave) indoor deployment and discusses compliance with international limits.

View raw extracted JSON

{
    "study_type": "exposure_assessment",
    "exposure": {
        "band": "mmWave",
        "source": "5G FR2 and Wi-Fi (802.11ay) in an indoor public library",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": null,
    "sample_size": null,
    "outcomes": [
        "RF-EMF E-field characterization in a complex indoor high-node density environment",
        "Comparison of simulated vs measured RF-EMF exposure (validation of 3D ray launching tool)",
        "Compliance with international exposure limits"
    ],
    "main_findings": "An empirical and modeling RF-EMF exposure assessment was conducted in a public library scenario including dense 5G FR2 (28 GHz) and 802.11ay (60 GHz) services. The authors report exposure levels far below current international regulation limits, and the proposed deterministic 3D ray launching simulation showed good agreement with an empirical measurement campaign.",
    "effect_direction": "no_effect",
    "limitations": [],
    "evidence_strength": "insufficient",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "RF-EMF",
        "exposure assessment",
        "mmWave",
        "5G FR2",
        "28 GHz",
        "802.11ay",
        "60 GHz",
        "indoor",
        "public library",
        "high-node density",
        "heterogeneous networks",
        "E-field characterization",
        "3D ray launching",
        "beamforming",
        "MIMO",
        "measurements",
        "simulation validation",
        "compliance"
    ],
    "suggested_hubs": [
        {
            "slug": "5g-policy",
            "weight": 0.59999999999999997779553950749686919152736663818359375,
            "reason": "Assesses RF-EMF exposure in 5G FR2 (mmWave) indoor deployment and discusses compliance with international limits."
        }
    ]
}

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AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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