[{"name":"SP-211025","title":"New Study on Service-based interface between NG-RAN and 5GC","source":"Intel, Qualcomm Incorporated, Deutsche Telekom, Verizon UK Ltd., AT&T, Microsoft, Orange, Cisco, InterDigital","contact":"Saso Stojanovski","contact-id":24932,"tdoctype":"SID new","for":"Approval","abstract":"Objective: This study item aims at investigating 5GS enhancements to enable the use of a service-based interface between NG-RAN and the 5GC for selected N2 functionality that is not related to UE mobility or NAS signalling. Specifically, the study aims to investigate the following aspects: 1. Identification of N2 functionality not related to UE mobility or NAS signalling that can benefit from a service-based interface. Examples include UE Radio Capability ID mapping, obtaining of non-UE associated assistance data, broadcast of assistance data by an LMF, Warning Request Transfer, communication between NG-RAN and NWDAF (depending on RAN WG3 progress), etc. As part of the study, and in close cooperation with RAN WG3, it will be investigated whether the service-based interface could also be used for direct conveyance of information between NG-RAN nodes that currently traverses the AMF transparently (e.g. RIM Information Transfer, Configuration Transfer for SON). 2. Mechanisms for implementation of the identified NG-RAN services (i.e. service registration, service discovery, request\/response vs subscribe\/notify paradigm, etc.). 3. Investigate the migration and co-existence aspects for deployments where NG-RAN nodes supporting a service-based interface need to co-exist with legacy NG-RAN nodes. The study will be coordinated with RAN WG3 and CT WG4 WGs as needed. The focus of the SA WG2 work will be on the generic stage 2 framework for a service-based interface for the identified N2 functionality (as listed in the objectives above) that falls under SA WG2 responsibility. As part of the study it will be concluded whether and how to proceed with normative work. The time for this study item is estimated at 5 TUs, as summarized in the table","secretary_remarks":"CC#4: Noted","agenda_item_sort_order":38,"ainumber":"6.4","ainame":"New Release 18 Study Item Descriptions","tdoc_agenda_sort_order":11160,"status":"noted","reservation_date":"2021-09-08 12:42:25","uploaded":"2021-09-08 17:57:40","revisionof":"","revisedto":"","release":"Rel-18","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/TSG_SA\/TSGS_93E_Electronic_2021_09\/Docs\/SP-211025.zip","group":"SP","meeting":"SP-93-e","year":2021,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]