Japan FWA Evaluation Criteria
"Learn about the unique design targets for Japan FWA, including max TRP and antenna gain, and how to determine appropriate values for peak EIRP, REFSENS, and spherical coverage. Reference R4-2008326 provides insight from email discussions regarding NR_FR2_FWA. Stay informed on the latest developments in FWA technology."
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Presentation Transcript
3GPP TSG-RAN WG4 Meeting # 95-e Electronic Meeting, 25 May 5 June 2020 R4-2008921 WF on FR2 FWA evaluations Qualcomm
Background Japan FWA has unique design targets: Max. TRP of 23 dBm Max antenna gain of 20 dBi Peak EIRP and REFSENS suitable for FWA application Use cases like that of PC1, but modified for EIRP and REFSENS 2
WF on peak EIRP On how to determine appropriate value of min. peak EIRP Option 1: Identify target dBm values, no consideration for element count 26, 28, 32, etc Option 2: Average company estimates to derive requirement after convergence on element count N N=8, N=16 Option 3: Create multiple power classes that differ in min. peak EIRP value PC5 ~ 32 dBm PC6 ~ 28 dBm Option 4: Repurpose existing power classes with additional signaling Example: PC2 in FWA condition is expected to produce +28 dBm of peak EIRP, and 8 dB degradation at 85th %ile 3
WF on REFSENS On how to determine appropriate value of REFSENS Option 1: Identify target dBm values for SNR of -1 dB, 50MHz channel , no consideration for element count Examples: -90.5, -91.5, etc, Option 2: Average company estimates to derive requirement Option 3: Average company estimates to derive requirement after convergence on element count N N=8, N=16 Option 4: Pick highest REFSENS among proposals to derive requirement Highest REFSENS is most relaxed value that is inclusive of all proposals 4
WF on Spherical Coverage Japan FWA shall have no more than 8 dB degradation from peak value in 85th %ile direction. EIRP in 85th%ile direction (CDF) is min peak EIRP 8 dB EIS in 85th%ile direction (CCDF) is REFSENS + 8 dB 5
Reference R4-2008326 Email discussion summary for [95e][136] NR_FR2_FWA_Bn257_Bn258 Moderator (Softbank Corp.) 6
