Simplified Assessment Method for Population RF Exposure Induced by a 4G Network

2017 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 2331

Study snapshot

Publicationmanual · 2017

Study typeexposure_assessment

Reported directionUnclear

Evidence ratingInsufficient

Abstract

Simplified Assessment Method for Population RF Exposure Induced by a 4G Network Huang Y, Wiart J. Simplified Assessment Method for Population RF Exposure Induced by a 4G Network. IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology. PP(99). 18 Sep 2017. DOI:10.1109/JERM.2017.2751751. Abstract This article presents a simplified method, based on surrogate modeling, to evaluate the day-to-day global population exposure to radio frequency (RF) electromagnetic fields (EMF) induced by a 4G network, from both uplink and downlink radio emissions in a typical urban city. The uncertainties of 4G-induced RF-EMF exposure of an entire population were characterized for the first time taking into account the variability linked to urban propagation environment, information and communication technology usage, EMF respectively from personal wireless devices and Evolved Node B (eNB), as well as uplink throughput. In addition, the study focuses on a sensitivity analysis in order to assess the influence of these parameters on RF-EMF exposure. Globally, results show that the 4G-induced RF-EMF exposure follows a Generalized Extreme Value distribution with an average value of 1.19×10 W/kg. Moreover, authors show that, contrary to what have been observed in the 3G-induced RF-EMF exposure, that is, the exposure is dominated by uplink radio emissions, results have highlighted the importance of received power density from eNB to the issue of 4G-induced RF-EMF exposure. In 4G, the uplink exposure from mobiles accounts for only 25% of global exposure, resulting from the high speed of uplink throughput. ieeexplore.ieee.org

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 directionunclear

Populationentire population in a typical urban city (modeled)

Sample sizeNot supplied

ExposureRF · day-to-day (global population exposure)

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

A surrogate-modeling method was presented to evaluate day-to-day global population RF-EMF exposure from a 4G network (uplink and downlink) in a typical urban city. The modeled 4G-induced exposure followed a Generalized Extreme Value distribution with an average value reported as 1.19×10 W/kg, and uplink exposure from mobiles accounted for about 25% of global exposure, highlighting the importance of received power density from eNB for 4G exposure.

Outcomes measured

Population RF-EMF exposure distribution (global exposure)
Average global exposure (W/kg)
Relative contribution of uplink vs downlink (eNB received power density)
Sensitivity of exposure to parameters (urban propagation, ICT usage, device/eNB EMF, uplink throughput)

View raw extracted JSON

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "4G network (uplink mobiles and downlink eNB/base station)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "day-to-day (global population exposure)"
  },
  "population": "entire population in a typical urban city (modeled)",
  "sample_size": null,
  "outcomes": [
    "Population RF-EMF exposure distribution (global exposure)",
    "Average global exposure (W/kg)",
    "Relative contribution of uplink vs downlink (eNB received power density)",
    "Sensitivity of exposure to parameters (urban propagation, ICT usage, device/eNB EMF, uplink throughput)"
  ],
  "main_findings": "A surrogate-modeling method was presented to evaluate day-to-day global population RF-EMF exposure from a 4G network (uplink and downlink) in a typical urban city. The modeled 4G-induced exposure followed a Generalized Extreme Value distribution with an average value reported as 1.19×10 W/kg, and uplink exposure from mobiles accounted for about 25% of global exposure, highlighting the importance of received power density from eNB for 4G exposure.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "4G",
    "RF-EMF",
    "population exposure",
    "uplink",
    "downlink",
    "eNB",
    "base station",
    "surrogate modeling",
    "sensitivity analysis",
    "urban propagation",
    "throughput",
    "SAR",
    "power density"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.05,
      "reason": "Mentions population exposure in an urban environment; not occupational, so low relevance."
    }
  ]
}

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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: 10.1109/jerm.2017.2751751
PubMed: Not supplied

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