[{"name":"S2-1811741","title":"Handling of N3GPP access registration in interworking between EPS and 5GS using N26.","source":"Ericsson","contact":"Shabnam Sultana","contact-id":21207,"tdoctype":"CR","for":"Approval","abstract":"Summary of change: Change 1: 5GS to EPS Interworking procedure using N26 (step 18 in 4.11.1.2.1 and step 15 in 4.11.1.3.2) is completed including that during UE registration in EPC, UDM\/HSS deregisters AMF for 3GPP access but keeps UE registration in AMF for non-3GPP access if any. The AMF keeps registered and subscribed to data updates in UDM while the UE registration for non-3GPP access is valid. Change 2: 5GS to EPS Idle Mobility. It is clarified in step 15 that any registration associated with non-3GPP access is not removed. Also a new optional step is added so when the UE deregisters from non-3GPP access, the AMF unsubscribes from the Subscription Data. Change 3: EPS to 5GS interworking procedures using N26 (step 11 in 4.11.1.3.3) is completed considering that if an old AMF exists in same PLMN handling UE context over non-3GPP access, then: The new AMF registers in UDM for non-3GPP access using a separate\/independent Nudm_UECM_Registration service operation.","secretary_remarks":"Revised in parallel session to S2-1812541.","agenda_item_sort_order":27,"ainumber":"6.5.","ainame":"Non-3GPP access specific functionality and flows","tdoc_agenda_sort_order":14420,"status":"revised","reservation_date":"2018-11-17 14:43:07","uploaded":"2018-11-20 13:43:50","revisionof":"","revisedto":"S2-1812541","release":"Rel-15","crspec":23.502,"crspecversion":"15.3.0","workitem":[{"winame":"5GS_Ph1"}],"crnumber":815.0,"crrevision":"","crcategory":"F","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"http:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_129BIS_West_Palm_Beach\/Docs\/S2-1811741.zip","group":"S2","meeting":"S2-129","year":2018,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]