[{"name":"R5-242118","title":"Reply LS on TT work for Rel-18 NR FR1 TRP TRS","source":"TSG WG RAN4","contact":"Ingbert Sigovich","contact-id":28887,"tdoctype":"LS in","for":"Information","abstract":"3GPP RAN4 would like to thank RAN5 for their LS in R4-2404119\/R5-241956 on TT work for Rel-18 NR FR1 TRP TRS._x000D_\nFollow the similar approach of Rel-17, RAN4 will specify Rel-18 TRP TRS requirements and recommended TT based on the agreed scope in WID [1]. _x000D_\nRAN4 has discussed the TT value, the agreements are listed as following:_x000D_\n- TT value is recommended as a ratio of MU, where TT=0.62*MU; according to currently available analysis of MU of AC system in RAN4, these TT values should be:_x000D_\n- For browsing mode: TRP TT is 1.1dB for above 3GHz bands and 1dB for below 3GHz bands, TRS TT is 1.3 dB for above 3GHz bands and 1.2 dB for below 3GHz bands;_x000D_\n- For talk mode: TRP TT is 1.2dB for above 3GHz bands and 1.1dB for below 3GHz bands, TRS TT is 1.5 dB for above 3GHz bands and 1.4 dB for below 3GHz bands;_x000D_\n- The above recommended TT values for NR FR1 TRP and TRS are decided based on the assessed preliminary MU budget and outcome of Rel-18 FR1 TRP TRS lab alignment activity, thereby incorporating the actual bounds of the lab alignment measurements and associated uncertainties [2] _x000D_\n- Considering the deep relation between requirements and TT for FR1 TRP TRS, RAN4 suggests not to further modify the TT value if MU values are further modified in RAN5  _x000D_\nWith regards to the core requirements definition process, RAN4 agree a detailed working procedure [3] (and some further update agreements in [4] [5]) to guide Rel-18 FR1 TRP TRS requirements definition work, some of the key aspects are summarized as following:_x000D_\n- RAN4 performed a successful FR1 TRP TRS Lab alignment activity with Anechoic Chamber method [2], all the participated 8 labs (ISO 17025 accredited labs) are well aligned based on lab alignment activity of reference LADs (Lab Alignment Device) with AC test system: _x000D_\n- Rel-18 AC lab alignment is performed under talk mode (Head and Hand phantom)_x000D_\n- In total, there are 4 LADs, two for band n28 lab alignment, two for band n78 lab alignment_x000D_\n- The pass\/fail limit (max offset between individual results and averaged value) for Rel-18 AC lab alignment activity is defined as 0.75*MU, i.e., 1.47dB for n78 TRP, and 1.41dB for n28 TRP, 1.73dB for n78 TRS and 1.69 dB for n28 TRS;_x000D_\n- RAN4 adopted a \u201cpartial anonymous\u201d approach in Rel-18 to collect UE model information those for performance measurement campaign, which is to check the representative of 3GPP data pool, some key aspects of this approach:_x000D_\n- The disclosure of exact device model is done only between each test lab to the Neutral Party, by using the same template [4]_x000D_\n- The disclosed UE information includes model name, model Number, vendor Name, power class, supported bands, certifications, year of production_x000D_\n- Instead of disclosing dedicated UE model information list, the Neutral Party will do the post-processing of all the UE information, and finally publish JUST the Statistics outcome of RAN4 UE model information pool, e.g.,_x000D_\n- Total Models\n- Total number of device vendors ...\n2\tActions: To RAN5: 3GPP RAN4 respectfully asks RAN5 to take the above feedback into account when developing NR FR1 TRP TRS conformance test specification.","secretary_remarks":"","agenda_item_sort_order":43,"ainumber":"5.2","ainame":"Review incoming LS (fm A.I. 3) & new subject discussion papers","tdoc_agenda_sort_order":21180,"status":"noted","reservation_date":"2024-11-04 09:22:51","uploaded":"2024-04-24 12:55:03","revisionof":"","revisedto":"","release":"Rel-18","crspec":"","crspecversion":"","workitem":[{"winame":"NR_FR1_TRP_TRS-Perf"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/TSG_RAN\/WG5_Test_ex-T1\/TSGR5__103_Fukuoka\/Docs\/R5-242118.zip","group":"R5","meeting":"R5-103","year":2024,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0}]