[{"name":"S2-2405867","title":"LS from CT WG4: LS on MPS PDU Session Handling for Non-MPS Subscriber","source":"CT WG4","contact":" Anonymous","contact-id":4132,"tdoctype":"LS in","for":"Action","abstract":"In 5G Core Networks, the SBI messages between network functions are handled with different message priorities over HTTP layer, e.g. the messages serving Multimedia Priority Service (MPS) subscribers will be handled with higher priority than non-MPS subscribers. For a MPS subscriber, the serving AMF and SMF(s) will prioritize the messages over N11 based on the subscription information received from UDM. For a service session involving both MPS subscribers and non-MPS subscriber (e.g. the MPS subscriber makes a voice call to a non-MPS subscriber), the PDU session of the non-MPS subscribers shall also be handled in high priority for end-to-end service assurance. In such a scenario, the SM Policy PCF for the non-MPS subscriber can get MPS priority indication from IMS system and inform the SMF to apply MPS priority for the IMS PDU session temporarily. The SMF then set high priority for SBI service requests towards the AMF. However, if the AMF is not aware about the MPS priority of the PDU session and it does apply normal priority for SBI service request towards the SMF, N11 signalling initiated by the AMF may be discarded by the SMF when overloaded or congested, and the service flow will fail. CT WG4 kindly asks SA WG2 whether there is existing stage 2 procedure to allow the AMF serving non-MPS subscriber also be informed to temporarily apply high priority for the PDU session in above scenario. If not CT WG4 would like to ask SA WG2 to define the corresponding stage 2 procedure if possible. Action: CT WG4 kindly asks SA WG2 to evaluate the above scenario and indicate the corresponding stage 2 procedure if exists. Or otherwise define the corresponding stage 2 procedure if possible.","secretary_remarks":"Responses drafted in S2-2406117, S2-2406246. Postponed in parallel session","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10690,"status":"postponed","reservation_date":"2024-04-24 06:41:41","uploaded":"2024-04-24 06:43:30","revisionof":"","revisedto":"","release":"","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"SA WG2","Cc":"","lsoriginalls":"C4-241527","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2405867.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2406115","title":"Session level priority realization in AMF","source":"Ericsson, Verizon","contact":"Shabnam Sultana","contact-id":21207,"tdoctype":"CR","for":"Approval","abstract":"Summary of change: Update the handling of PDU session level priority handling for the PDU sessions of non-MPS subscription Update the handliing of PDU session level priority handling for the PDU sessoin of MPS subscription Corrected AMF behaviour wrongly specified, this change applies to previous release of the spec as well","secretary_remarks":"Revised in parallel session to S2-2406997.","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10730,"status":"revised","reservation_date":"2024-05-16 12:54:15","uploaded":"2024-05-17 18:33:56","revisionof":"","revisedto":"S2-2406997","release":"Rel-18","crspec":"23.501","crspecversion":"18.5.0","workitem":[{"winame":"5GS_Ph1"},{"winame":" TEI18"}],"crnumber":5401.0,"crrevision":"","crcategory":"F","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2406115.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":false,"me_affected":false,"ran_affected":false,"cn_affected":true,"clauses_affected":"5.22.2, 5.22.3","crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2406116","title":"Session level priority realization in AMF","source":"Ericsson, Verizon","contact":"Shabnam Sultana","contact-id":21207,"tdoctype":"CR","for":"Approval","abstract":"Summary of change: The following are updated to support the corresponding updates in 23.501 considering the two cases as listed above. 1)Update the AMF service operation to include Session Priority as part of the parameters 2)Update the SMF service operations to include Session Priority as part of the parameters.","secretary_remarks":"Revised in parallel session to S2-2406998, merging S2-2406247","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10750,"status":"revised","reservation_date":"2024-05-16 12:54:16","uploaded":"2024-05-17 18:33:56","revisionof":"","revisedto":"S2-2406998","release":"Rel-18","crspec":"23.502","crspecversion":"18.5.0","workitem":[{"winame":"5GS_Ph1"},{"winame":" TEI18"}],"crnumber":4813.0,"crrevision":"","crcategory":"F","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2406116.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":false,"me_affected":false,"ran_affected":false,"cn_affected":true,"clauses_affected":"5.2.2.2.7, 5.2.8.2.5, 5.2.8.2.6","crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2406117","title":"[DRAFT] Reply LS on MPS PDU session handling for Non-MPS subscriber","source":"Ericsson","contact":"Shabnam Sultana","contact-id":21207,"tdoctype":"LS out","for":"Approval","abstract":"Provides SA WG2 answers for the questions raised by CT WG4","secretary_remarks":"Response to S2-2405867. Revised in parallel session to S2-2406999, merging S2-2406246","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10700,"status":"revised","reservation_date":"2024-05-16 12:54:17","uploaded":"2024-05-17 18:33:56","revisionof":"","revisedto":"S2-2406999","release":"Rel-18","crspec":"","crspecversion":"","workitem":[{"winame":"5GS_Ph1"},{"winame":" TEI18"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"CT WG4","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2406117.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2406246","title":"[DRAFT] LS on MPS PDU Session Handling for Non-MPS Subscriber","source":"Nokia","contact":"Laurent Thiebaut","contact-id":68713,"tdoctype":"LS out","for":"Approval","abstract":"[DRAFT] LS on MPS PDU Session Handling for Non-MPS Subscriber","secretary_remarks":"Response to S2-2405867. Merged into S2-2406999","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10720,"status":"merged","reservation_date":"2024-05-16 16:28:06","uploaded":"2024-05-17 18:28:59","revisionof":"","revisedto":"","release":"Rel-18","crspec":"","crspecversion":"","workitem":[{"winame":"5GS_Ph1"},{"winame":" TEI18"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"CT WG4","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2406246.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2406247","title":"MPS PDU Session Handling for Non-MPS Subscriber","source":"Nokia","contact":"Laurent Thiebaut","contact-id":68713,"tdoctype":"CR","for":"Approval","abstract":"Summary of change: 1) Per 23.501 AND 23.503, PCF: When an indication for a session arrives over the Rx\/N5 Interface and the UE does not have priority for the signalling QoS Flow, the PCF derives the ARP and 5QI parameters, plus associated QoS characteristics as appropriate, of the QoS Flow for Signalling as per Service Provider policy as specified in clause 6.1.3.11 of TS 23.503 AND For dynamic invocation of MPS service, the PCF shall generate the corresponding PCC rule(s) with the ARP and 5QI parameters as appropriate for the prioritized service Thus the question is on how AMF knows the (specific for MPS) ARP information related with a PDU Session: ARP information is currently provided by the SMF to the AMF as part of 4.3.3.2 UE or network requested PDU Session Modification (non-roaming and roaming with local breakout) case 1b (PCF initiated modification) step 3b 3b. For SMF requested modification, the SMF invokes Namf_Communication_N1N2MessageTransfer .. 29.518 N1N2MessageTransferReqData contains already ARP information But this information is currently only used in case paging would be needed to transfer the N1\/N2 SM information 2) (new functionality introduced by the CR) the AMF stores the ARP information, uses it at N11 signalling initiated by the AMF and provides it to the target AMF at inter AMF mobility. 3) N16(a) impacts also covered 4) Some alignment onto 29.518 stage 3 has also been done in 4.3.3.2 step 3b","secretary_remarks":"Merged into S2-2406998","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10770,"status":"merged","reservation_date":"2024-05-16 16:28:06","uploaded":"2024-05-17 18:28:59","revisionof":"","revisedto":"","release":"Rel-18","crspec":"23.502","crspecversion":"18.5.0","workitem":[{"winame":"5GS_Ph1"},{"winame":" TEI18"}],"crnumber":4818.0,"crrevision":"","crcategory":"F","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2406247.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":false,"me_affected":false,"ran_affected":false,"cn_affected":true,"clauses_affected":"4.3.3.2 ; 4.3.3.3 ; 5.2.2.2.2 ; 5.2.8.2.3","crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2406997","title":"Session level priority realization in AMF","source":"Ericsson, Verizon, Nokia? Peraton Labs?","contact":"Shabnam Sultana","contact-id":21207,"tdoctype":"CR","for":"Approval","abstract":"Summary of change: Update the handling of PDU session level priority handling for the PDU sessions of non-MPS subscription Update the handliing of PDU session level priority handling for the PDU sessoin of MPS subscription Corrected AMF behaviour wrongly specified related to ARP, this change applies to previous release of the spec as well","secretary_remarks":"Revision of S2-2406115. Postponed in parallel session","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10740,"status":"postponed","reservation_date":"2024-05-30 05:19:39","uploaded":"2024-06-03 05:31:25","revisionof":"S2-2406115","revisedto":"","release":"Rel-18","crspec":"23.501","crspecversion":"18.5.0","workitem":[{"winame":"5GS_Ph1"},{"winame":" TEI18"}],"crnumber":5401.0,"crrevision":1.0,"crcategory":"F","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2406997.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2406998","title":"Session level priority realization in AMF","source":"Ericsson, Verizon, Nokia?","contact":"Shabnam Sultana","contact-id":21207,"tdoctype":"CR","for":"Approval","abstract":"Summary of change: The following are updated to support the corresponding updates in 23.501 considering the two cases as listed above. 1)Update the AMF service operation to include Session Priority as part of the parameters 2)Update the SMF service operations to include Session Priority as part of the parameters.","secretary_remarks":"Revision of S2-2406116, merging S2-2406247. Postponed in parallel session","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10760,"status":"postponed","reservation_date":"2024-05-30 05:19:40","uploaded":"2024-06-03 05:31:25","revisionof":"S2-2406116","revisedto":"","release":"Rel-18","crspec":"23.502","crspecversion":"18.5.0","workitem":[{"winame":"5GS_Ph1"},{"winame":" TEI18"}],"crnumber":4813.0,"crrevision":1.0,"crcategory":"F","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2406998.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2406999","title":"[DRAFT] Reply LS on MPS PDU session handling for Non-MPS subscriber","source":"Ericsson","contact":"Shabnam Sultana","contact-id":21207,"tdoctype":"LS out","for":"Approval","abstract":"Provides SA WG2 answers for the questions raised by CT WG4","secretary_remarks":"Revision of S2-2406117, merging S2-2406246. Postponed in parallel session","agenda_item_sort_order":21,"ainumber":"6.8","ainame":"Specific services support","tdoc_agenda_sort_order":10710,"status":"postponed","reservation_date":"2024-05-30 05:19:40","uploaded":"2024-06-03 05:31:25","revisionof":"S2-2406117","revisedto":"","release":"Rel-18","crspec":"","crspecversion":"","workitem":[{"winame":"5GS_Ph1"},{"winame":" TEI18"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"CT WG4","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_163_Jeju_2024-05\/Docs\/S2-2406999.zip","group":"S2","meeting":"S2-163","year":2024,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0}]