EXISTING REGULATIONS AND PREVIOUS STUDIES RELEVANT TO THE WORK ITEM 5725-5875 Figure 10 below is an overview of the systems/services in the band 5725-5875 MHz. Figure 10: Overview of systems/services in the band 5725-5875 MHz Table 9: Overview of applications in the band 5725-5875 MHz Application Frequency ECC/ERC harmonization measure Standard Notes Amateur 5650-5850 MHz EN 301 783 [34] Amateur Satellite 5830-5850 MHz BFWA 5725-5875 MHz ECC/REC/(06)04 [19] EN 302 502 [37] DA2GC 5855-5875 MHz ECC/DEC/(15)03 [18] FSS Earth Stations 5850-5925 MHz EN 301 443 [33] Priority for networks ITS 5855-5875 MHz, 5875-5925 MHz ECC/DEC/(08)01 [17] ECC/REC/(08)01 [20] ERC/REC 70-03 [26] EN 302 571 [38] Only the part non- safety 5855-5875 MHz is considered here. ISM 5725-5875 MHz MBR 5852-5872 MHz, 5880-5900 MHz ECC/REC/(17)03 [21] EN 303 276 [40] Non-specific SRD 5725-5875 MHz ERC/REC 70-03 EN 300 440 [29] Radiodetermination applications 4500-7000 MHz ERC/REC 70-03 (Annex 6) EN 302 372 [36] Within the band MHz for TLPR application Radiolocation (military) 5250-5850 MHz TTT 5795-5815 MHz ERC/REC 70-03 (Annex 5) EN 300 674 [30][31][32] Within the band MHz. TTT in the band 5805-5815 MHz on a national basis Weather Radar 5250-5850 MHz Ground and airborne WIA 5725-5875 MHz ERC/REC 70-03 Not considered to be used outside factories
Net Tx density of power e.i.r.p. dBm/MHz 1 -2 -5 Reception part: ITS Receiver bandwidth MHz 10 10 10 Noise power dBm -100 -100 -100 Antenna gain dBi 4 4 4 power per MHz at antenna input dBm/MHz -114 -114 -114 Protection Criterion I/N dB -6 -6 -6 Allowable interfering level 'I' at the receiver antenna input dBm/MHz -120 -120 -120 Main lobe RLAN - Main lobe ITS Sidelobe attenuation dB 0 0 0 Required Attenuation dB 121 118 115 Separation distance RLAN → ITS Sep. distance - model m 507 432 367 Sep. distance - Suburban model m 925 771 642 Sep. distance - Rural model m 1821 1476 1196 Sep. distance - ETSI TR 102 492 m 1044 808 625 Results of MCL calculations for interference from ITS into in the band 5855-5875 MHz Using the interference scenarios described in section 4.1.1, we set out the results of a Minimum Coupling Loss analysis where ITS is the interferer and RLAN is the victim. For each scenario, the table sets out the minimum separation required between the ITS interferer and the RLAN victim in order that the required attenuation is resolved. 12: MCL calculations for interference from ITS into RLAN – separation distances Parameter Unit Scenario 1 Ext. ITS Antenna Scenario 2 Int. ITS Antenna Emission part: ITS Bandwidth MHz 10 10 Tx e.i.r.p. dBm 33 33 Wall attenuation (hull of the car) dB 20 0 Total net power e.i.r.p. dBm 13 33 Reception part: RLAN
Receiver bandwidth MHz 20 20 Noise power dBm -97 -97 Antenna gain dBi 1.3 1.3 Protection Criterion I/N dB -6 -6 Interference threshold at antenna dBm -104.3 -104.3 Required attenuation dB 117.3 137.3 Required separation distances ITS → RLAN Sep. distance - Urban model m 416 1215 Sep. distance - Suburban model m 740 2486 Sep. distance - Rural model m 1409 5687 Sep. distance - ETSI TR 102 492 m 763 4200 Summary - Analysis Table 13: Summary results, MCL calculations for interference from RLAN into ITS – separation distances Scenarios for RLAN into ITS Results Separation Distance Scenario 1 – RLAN in-car (14 dBm power), ITS external antenna RLAN Bandwidth Required Attenuation Urban Suburban Rural ETSI TR 102 492 20 MHz 101 dB 174 m 275 m 390 m 190 m 40 MHz 98 dB 148 m 226 m 304 m 147 m 80 MHz 95 dB 126 m 183 m 230 m 114 m Scenario 2 – RLAN in-car (14 dBm power), ITS internal antenna RLAN Bandwidth Required Attenuation Suburban Rural ETSI TR 102 492 20 MHz 121 dB 507 m 925 m 1821 m 1044 m 40 MHz 118 dB 432 m 771 m 1476 m 808 m 80 MHz 115 dB 367 m 642 m 1196 m 625 m Table 14: Summary results, MCL calculations for interference from ITS into RLAN– separation distances Scenarios for ITS into RLAN Required Attenuation Separation Distance Urban Suburban Rural ETSI TR 102 492