[{"name":"R5-205683","title":"New WID on UE Conformance Test Aspects for NR support for high speed train scenario","source":"CMCC","contact":"Dan Song","contact-id":86282,"tdoctype":"WID new","for":"Approval","abstract":"Justification\nIMT-2020 is expected to enable high mobility up to 500 km\/h with acceptable QoS. High speed train scenario is also one of the deployment scenarios as captured in TR 38.913. The key characteristics of high speed train scenario are consistent passenger user experience and critical train communication reliability with very high mobility. \nWith high frequency and high speed, the Doppler shift and Doppler spread will be severe (e.g. for 500km\/h with 3.5 GHz, the Doppler shift is about 1.62 KHz). However, the high speed scenario is not considered when specifying the UE RRM requirements, for example, the Rel-15 cell re-selection requirements for NR are the same with that for LTE without highSpeedEnhancedMeasFlag. Besides, up to 400Hz Doppler frequency is considered in Rel-15 for NR demodulation requirements. As a result, there are no UE RRM requirements or UE demodulation requirements specified for high speed train scenario supporting up to 500km\/h in Rel-15. The performance of the high speed scenario with high frequency and high velocity (e.g. 500km\/h with 3.5 GHz) cannot be guaranteed. It is essential to specify the UE demodulation requirements and UE RRM requirements for high speed train scenario with up to 500km\/h in Rel-16.\nThe Rel-16 WI NR_HST-Core has been 100% completed and NR_HST-Perf has been 85% completed at RAN#89-e meeting. According to the requirements of NR network deployment and performance optimization, it is justified now to start the work on the corresponding UE conformance test specifications for NR HST features in 3GPP RAN WG5 to meet the market requirements in time.\n\n\tObjective\n\tObjective of SI or Core part WI or Testing part WI\nThe objective of this work item is to define the UE conformance requirements corresponding to WID on NR HST with Unique identifier 840092. This work item will cover Demod and RRM conformance test specifications with NR HST.","secretary_remarks":"","agenda_item_sort_order":7,"ainumber":"4.1","ainame":"\tNew Work Item proposals - for intro only","tdoc_agenda_sort_order":56830,"status":"revised","reservation_date":"2020-10-29 15:37:16","uploaded":"2020-10-30 16:37:31","revisionof":"","revisedto":"R5-206249","release":"Rel-16","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/TSG_RAN\/WG5_Test_ex-T1\/TSGR5_89_Electronic\/Docs\/R5-205683.zip","group":"R5","meeting":"R5-89-e","year":2020,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]