[{"name":"R5-201706","title":"Proposing new test cases for small TEI-16 WIs - inter-RAT HO from NR to EN-DC","source":"China Telecommunications, China Unicom, Vodafone, China Mobile, NTT Docomo","contact":"JING ZHAO","contact-id":85327,"tdoctype":"discussion","for":"Endorsement","abstract":"1.\tIntroduction\nThe purpose of this document is to discuss about adding conformance test cases for RAN2's TEI16 small WIs - inter-RAT HO from NR to EN-DC.\n2.\tDiscussion\nThe most operators will deploy EN-DC to support eMBB service in their first stage of 5G deployment, and after that stage, new SA network may be deployed together with part of EN-DC base stations software upgraded to NSA\/SA dual mode. So there will be regions only support NSA co-existing with regions that support NSA\/SA or SA only. When NSA\/SA dual mode UE moves out of NR SA or NSA\/SA cell coverage to NSA cell coverage, direct configuration of EN-DC during inter-RAT handover can reduce the DC configuration latency and quickly recover service data rate after HO procedure. From the operator\u2019s point of view, it would be beneficial to support SA to EN-DC HO in NR practical network.\nR2-2002336 and R2-2002337 had been agreed by RAN2 for adding contents to support inter-RAT handover from NR to EN-DC into TS 38.331 and TS 36.331 in release16 versions:\n\n1.\tA new UE capability indicator nr-HO-ToEN-DC-r16 had been added to indicate the network whether the UE support inter-RAT handover from NR to EN-DC\n2.\t Include the NR SCG configuration and SN security parameters which needed to setup EN-DC in handover command \n3.\tAdd related content of scg-ConfigResponseNR in RRCConnectionReconfigurationComplete to setup EN-DC\n\nRelated additional conformance requirements should be covered in RAN5's spec 38.523 series.\n\n3.\tProposal\nAdding additional test cases into 38.523-1 as follow:\n8.1.4.2.1.2 Inter-RAT handover \/ From NR to EN-DC \/ Success\nRelated test applicability will be added into 38.523-2 as well.","secretary_remarks":"","agenda_item_sort_order":9,"ainumber":"4.2.1","ainame":"5GS","tdoc_agenda_sort_order":17060,"status":"noted","reservation_date":"2020-05-06 06:20:26","uploaded":"2020-05-06 06:41:29","revisionof":"","revisedto":"","release":"Rel-16","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"http:\/\/www.3gpp.org\/ftp\/TSG_RAN\/WG5_Test_ex-T1\/TSGR5_87_Electronic\/Docs\/R5-201706.zip","group":"R5","meeting":"R5-ah-38102","year":2020,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]