RF Safe

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

Sensors (Basel, Switzerland) · 2021 · No effect · Insufficient evidence

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No effectInsufficient evidencePaper 5662

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 propo…

Study snapshot

PublicationSensors (Basel, Switzerland) · 2021
Study typeexposure_assessment
Reported directionNo effect
Evidence ratingInsufficient

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.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeexposure_assessment
Effect directionno_effect
PopulationNot supplied
Sample sizeNot supplied
ExposuremmWave
Evidence strengthInsufficientConfidence: 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
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": 0.78,
  "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": 0.6,
      "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 and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.3390/s21248419
PubMed: 34960513

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