[{"name":"SP-211078","title":"New SID: Study on Seamless UE context recovery","source":"Samsung, NEC, CableLabs, Cisco","contact":"Lalith Kumar","contact-id":80547,"tdoctype":"SID new","for":"Approval","abstract":"Objective: Following objectives are expected to be studied: 1) Study the mechanisms in which the 'unavailability period' is determined for the UE based on co-ordination between UE-5GC and 5GC-AF(s). 2) Study the mechanisms for zero or minimal impact on the UEs context at both UE and network side (e.g AMF, SMF) when UE gets into RM-DEREGISTERED state and re-register again. 3) Study the mechanisms for minimizing session management and upper layer service interruptions when UE gets into RM-DEREGISTERED state and re-register again. 4) Study the mechanisms in which minimal signalling impact is incurred on network when UE gets into RM-DEREGISTERED state and re-register again. NOTE 1: Example events in which UE gets in RM-DEREGISTERED state and re-register again are listed in justification section. NOTE 2: The RM-DEREGISTERED state and re-register again above indicates today's implementations, the solutions in this study can aim to achieve above objectives by retaining the UE in RM-REGISTERED state. TU Plan: estimate 6 TUs (4 TUs for the study and 2 TUs for the normative work).","secretary_remarks":"CC#4: Noted","agenda_item_sort_order":38,"ainumber":"6.4","ainame":"New Release 18 Study Item Descriptions","tdoc_agenda_sort_order":11230,"status":"noted","reservation_date":"2021-09-08 14:50:37","uploaded":"2021-09-08 15:43:36","revisionof":"","revisedto":"","release":"","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-211078.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}]