Paolo Gianola MONITORING IZLOŽENOSTI EMF I SAR u Telekom Italija

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Paolo Gianola MONITORING IZLOŽENOSTI EMF I SAR u Telekom Italija

  1. 1. GRUPPO TELECOM ITALIAEMFs Exposure Monitoring andSAR Certification in Telecom ItaliaITU Workshop on Human Exposure to Electromagnetic Fields(EMFs)Turin, Italy, 9 May 2013Mauro FrancavillaPaolo Gianola
  2. 2. A new law, issued in dec2012 ,has established that the6V/m must be averaged in an interval of 24 hoursA new law, issued in dec2012 ,has established that the6V/m must be averaged in an interval of 24 hoursNewsDec2012Italian Laws on EMFs Exposure Limits for PopulationIn common practice the 6 V/m is thelimit considered almost everywherein ItalyMax6V/mThree Limits have been defined in Italy. Cumulative and flat in the range of 100 KHz – 300GHz:1. Exposure Limit: level not to be exceed in every exposure condition2. Attention Value: level not to be exceed in long term exposure condition (at least 4h/day)3. Quality Target: level not to be exceed in outdoor intensely frequented areasLawsLimitsLimits have been established in 1998 and confirmed in 2003 and they must be consideredas an average in each interval of 6 minutes (close to the peak level):1. Exposure Limit: 20 V/m2. Attention Value: 6 V/m3. Quality Target: 6 V/m2
  3. 3. Note: the EM Limits are established through an equivalence relation between SAR andElectromagnetic Power DensityReduction Factor Criteria for Exposure Limits Definition ICNIRP established exposure limits that are: Frequency-dependent Not discriminatory between short and long term exposure The majority of the European States and also other Countries use the ICNIRPlimits in their regulationsComparison between Exposure Limits applied in Italy andrecommended in EuropeICNIRP has established a reduction factor of 50with respect to «the threshold for irreversible effects ineven the most sensitive tissues»ThresholdICNIRP - 504W/kg0.08W/kg4,5 W/m2 @900MHz- 2.250Italy0,1 W/m2 @900MHzThe Italian Limits of 6V/m corresponds to a reductionfactor of 2250 with respect to the above threshold at900MHz3
  4. 4. Transmitted Powers & EMFs Monitoring4 New Italian Regulation imposes to measure and calculate the EMF exposure by considering theaverage value over an interval of 24 hours: Measurements should be performed with instruments able to store data continuously in 24 hour Calculations have to be executed by considering the average transmitted power that dependson traffic variation and power control mechanismsAverage transmitted power have to be storedby considering the instantaneouslytransmitted power coming from networkcounters for all sites, all systems and allfrequenciesabout 0.5 million of antennas inItaly: compliance proceduresare going to become more andmore complex and expensive35363738394041424344dBmTR01U3 - Potenza trasmessa708:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00800:0001:0002:0003:0004:0005:0006:0007:0008:0009:00PTX(counters)PMAXPMINPAVG, 24hTransmitted Power in a 3Gcell
  5. 5. 5OutputImages, text/HTML reportsFar-field formula / Near-field modelFree-space model / Ray-tracing & UTDPlant data MapsAntenna dataRadiation patternsGain, Tilt, PolarizationPosition, OrientationFeeder lossesPeak/Average PowerFrequencyDigital mapsImagesMaterial characterizationRadio-base Station compliance monitoring in Telecom ItaliaGUARDIAN (Graphical User Application for theRaDiated Intensity in the Antenna Neighbourhoods):deterministic tool developed and used by Telecom Italiafor verifying, certifying, monitoring the compliance of theradio-base stations with the electromagnetic exposurelimits in forceImport/ExportGScript5
  6. 6. 63D Digital Maps are used for EMFs exposure complianceproceduresTorino (little bull)Portion ofthe digitalmap ofTorino
  7. 7. 7Compliance Boundary at 6V/m and peak power in antennaCompliance Boundary Electric-field DistributionAnalysis performed in a tri-sectorial site where GSM, UMTS and LTE technologies areconsidered:Calculations are made by considering 6V/m as threshold and Peak Power in antennasNot Compliant SitePeak power, threshold 6V/m Peak power, threshold 6V/m
  8. 8. 8Compliance Boundary at 6V/m and average power inantennaCompliance Boundary Electric-field DistributionAnalysis performed in a tri-sectorial site where GSM, UMTS and LTE technologies areconsidered :Calculations are made by considering 6V/m as threshold and Average Power in antennasCompliant Site but furtherextensions not allowed (e.g. nosite sharing)Average power over 24h, threshold 6V/m Average power over 24h, threshold 6V/m
  9. 9. 9Compliance Boundary at 40V/m and peak power in antennaCompliance Boundary Electric-field DistributionAnalysis performed in a tri-sectorial site where GSM, UMTS and LTE technologies areconsidered :Calculations are made by considering 40V/m as threshold and Peak Power in antennasCompliant Site: nolimitation in anytechnology extension9Peak power, threshold 40V/m (ICNIRP) Peak power, threshold 40V/m (ICNIRP)
  10. 10. 10Expected Compliance Assesment in Torino in differentscenariosGSM/GPRS UMTS/HSPA LTE2100900 1800 180080027%63%100%18%23%0%55%14%0%0%10%20%30%40%50%60%70%80%90%100%Peak power, threshold 6V/m Average power over 24 hours, threshold 6V/m Peak power, threshold 40V/m (ICNIRP)Fully Compliant sitesPartially Compliant sites (roofs are excluded)Non-compliant sitesSimulation considering all systems/frequencies in all TIM sites in Torino+ +
  11. 11. Telecom Italia internal process for devices certification TI is directly involved in 3GPP/IECstandardization activities Internal definition of device requirements Final technical and commercial approval for thedevice to be sold with TIM brand Quality control based on sampled supplies Definition of test list and test environment to check thecompliance to requirements Test Execution Results discussion with manufacturer11
  12. 12. TI SAR laboratory activities: accreditation Telecom Italia SAR laboratoryaccredited by Italian bodyACCREDIA (ex SINAL) Accreditation according toISO/IEC 17025:2005 Possibility to perform SARcompliance campaigns not onlyfor internal clients ACCREDIA latest successfullyaudit performed in October 201212
  13. 13. SAR Measurement Technical Standards contributionWorking groups: IEC TC106 MT 1, Maintenance of IEC 62209-1 ICES TC34, Wireless Handset SAR certification(SC1: Experimental Techniques)Latest face to face Meeting held in Turin: September11th-14th 201213
  14. 14. Fast SAR and test reduction techniques Great effort in introducing new FAST SAR methods andprocedures to reduce overall measurement time***M. Francavilla: “Time reduction to demonstrate SAR compliance of GSM/UMTS mobile phones” BEMS2011 Meeting, Halifax, CA, June 2011*M.G. Douglas, S. Gabriel, C. Bucher, D. Iliev, J. Kastrati, C. Leubler, M. Meili, K. Pokovic and N. Kuster:“Fast SAR Methods for Electromagnetic Exposure Evaluation of Wireless Devices” EuCAP 2011 Meeting,Rome, April 201114 A statistical based approach is introduced by TI, to reduce thetime needed to perform SAR measurements in the case ofGSM900, DCS1800 and UMTS band I handsets**

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