[{"name":"S2-2308297","title":"LS from CT WG3: Reply LS on MBS service area update clarification","source":"CT WG3","contact":"Abdessamad EL MOATAMID","contact-id":89270,"tdoctype":"LS in","for":"Action","abstract":"CT WG3 thanks SA WG6 for their LS on clarifying MBS service area update procedures. Regarding the below question to CT WG3: 'Q2. SA WG6 would like to ask CT WG3 and CT WG4 to clarify the scenario(s) when the error 'UNKNOWN_MBS_SERVICE_AREA 404 Not Found The requested MBS service area (e.g. identified by the Area Session ID) cannot be found.' in 3GPP TS 29.522 can occur? Is the MBS service area not found in MB-SMF, NRF or NEF? Can it occur during MBS session update?' CT WG3 would like to provide the below answer: - This HTTP '404 Not found' error status code response and the corresponding 'UNKNOWN_MBS_SERVICE_AREA' application error are simply relayed by the NEF to the AF when received from the MB-SMF as specified in the last paragraph of clause 4.4.29.3.5 of TS 29.522. - This error case is not related to the procedure of MBS Session update request with an updated MBS Service Area. It is rather related to the case where the received Area Session ID in an MBS Session Status Subscription request is not found. CT WG3 has agreed the attached CR to further clarify this. CT WG3 will wait for the feedbacks from SA WG2 and CT WG4 to provide further feedback and update its specifications accordingly, if necessary. CT WG3 would also like to point out that this issue should also be studied for the case where the MBSF is used. Action: CT WG3 kindly asks SA WG6, SA WG2 and CT WG4 to take above information into account.","secretary_remarks":"Noted","agenda_item_sort_order":52,"ainumber":"8.9","ainame":"Architectural enhancements for 5G multicast-broadcast services (5MBS)","tdoc_agenda_sort_order":12390,"status":"noted","reservation_date":"2023-06-28 15:24:35","uploaded":"2023-06-28 15:29:52","revisionof":"","revisedto":"","release":"Rel-18","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"SA WG6, SA WG2, CT WG4","Cc":"","lsoriginalls":"C3-232410","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_158_Goteborg_2023-08\/Docs\/S2-2308297.zip","group":"S2","meeting":"S2-158","year":2023,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0}]