[{"name":"R5-234257","title":"Current issues in conformance testing of CG-SDT feature in RRC INACTIVE state","source":"Nokia, Nokia Shanghai Bell","contact":"Tuomo S\u00e4yn\u00e4j\u00e4kangas","contact-id":69937,"tdoctype":"discussion","for":"Endorsement","abstract":"AI 5.3.16.6\nObservation 1: Test commands defined for E-UTRA and EPC in TS 36.509 [1] are also applicable for 5GS with the exception that where E-UTRA and EPS bearers are mentioned the same applies for NR and 5GS QoS flows, respectively.\nObservation 2: The initiation of Activate UE Test mode and Deactivate UE Test mode, as per TS 36.509 [1], can only be done when the UE is in E-UTRA connected state (see clause 5.3.2.2 and 5.3.3.2 in TS 36.509 [1]) meaning, the same procedures will be applicable for 5GS when the UE is in NR Connected state (RRC Connected state).\nObservation 3: As per TS 36.509, there is no explicit description about the UE state for initiating Close UE Test Loop and Open UE Test Loop procedures (see clause 5.3.2.2 and 5.3.3.2 in TS 36.509 [1]). However, the implicit understanding is that the UE needs to be in E-UTRA connected state for initiating these procedures. This further implies that the UE needs to be in RRC Connected state for initiating Close UE Test Loop and Open UE Test Loop procedures in 5GS.\nObservation 4: For RRC INACTIVE test case(s), bringing the UE back to RRC Connected state just for sending test control commands is not an optimal solution as it will increase the test time and will involve additional message exchanges between SS and the UE.\nObservation 5: The other possible solution to send the test mode command(s) to a Rel-17 UE in RRC INACTIVE state is through subsequent SDT transmissionin MO-SDT as it doesn\u2019t support MT-SDT (MT-SDT is a Rel-18 feature).\nObservation 6: Sending the test control command(s) through subsequent SDT transmission in RRC INACTIVE state is not a reliable solution for the current and future RAN5 test cases in RRC INACTIVE state.\nObservation 7: Currently there is no reliable method through which these test control commands and the corresponding uplink acknowledgement messages can be sent to\/from the UE in the RRC INACTIVE state to ensure the correct test mode control.\nObservation 8: The existing UE Test Loop Mode B provides the mechanism of loopbacking multiple PDUs through a single T_delay_modeB timer. However, there is no existing way to independently configure the transmission time of 2nd buffered PDU as it will be transmitted immediately after the 1st buffered PDU.\nProposal: RAN5 to find a solution to the open issues discussed in this contribution and implement in the relevant test cases.","secretary_remarks":"","agenda_item_sort_order":9,"ainumber":"4.2.1","ainame":"\t5GS","tdoc_agenda_sort_order":42570,"status":"revised","reservation_date":"2023-09-08 08:53:34","uploaded":"2023-08-11 09:40:14","revisionof":"","revisedto":"R5-235264","release":"Rel-17","crspec":"","crspecversion":"","workitem":[{"winame":"NR_SmallData_INACTIVE-UEConTest"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_ran\/WG5_Test_ex-T1\/TSGR5__100_Toulouse\/Docs\/R5-234257.zip","group":"R5","meeting":"R5-100","year":2023,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0}]