[{"name":"C4-234061","title":"Revised SID on IMS Disaster Prevention and Restoration Enhancement","source":"China Telecom Corporation Ltd.","contact":"Liu Liu","contact-id":76788,"tdoctype":"SID revised","for":"Approval","abstract":"","secretary_remarks":"","agenda_item_sort_order":9,"ainumber":"5.1","ainame":"CT4 Led WIs","tdoc_agenda_sort_order":40610,"status":"agreed","reservation_date":"2023-09-27 02:52:57","uploaded":"2023-09-28 03:03:17","revisionof":"","revisedto":"","release":"Rel-18","crspec":"","crspecversion":"","workitem":[{"winame":"FS_IMS_RES"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_ct\/WG4_protocollars_ex-CN4\/TSGCT4_118_Xiamen\/Docs\/C4-234061.zip","group":"C4","meeting":"C4-118","year":2023,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"C4-234220","title":"Discussion Paper on supporting SMF load balance redundancy for 5G VN group communication","source":"China Mobile, China Southern Power Grid","contact":"RONG WANG","contact-id":87346,"tdoctype":"discussion","for":"Discussion","abstract":"The proposal of study on supporting SMF load balance redundancy for 5G VN group communication was submitted to CT4#117 meeting, see discussion paper in C4-233260.\n\nIt has been identified that the current 5G VN group mechanism does not support the most basic SMF load balance redundancy mechanism. Although the SA2 restrict that only a certain SMF is responsible for all the PDU sessions for communication (See clause 5.29.3 of 3GPP TS23.501). But from stage-2 perspective, there should not be contradiction between \u201ca dedicated SMF serving a 5G VN\u201d and \u201credundancy solution\u201d.\n\nThis paper would like to propose a study on the study item and specify the standardized solution.","secretary_remarks":"","agenda_item_sort_order":9,"ainumber":"5.1","ainame":"CT4 Led WIs","tdoc_agenda_sort_order":42200,"status":"noted","reservation_date":"2023-09-28 11:55:57","uploaded":"2023-09-29 10:25:57","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_ct\/WG4_protocollars_ex-CN4\/TSGCT4_118_Xiamen\/Docs\/C4-234220.zip","group":"C4","meeting":"C4-118","year":2023,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"C4-234221","title":"New SID on supporting SMF load balance redundancy for 5G VN group communication","source":"China Mobile","contact":"RONG WANG","contact-id":87346,"tdoctype":"SID new","for":"Approval","abstract":"","secretary_remarks":"","agenda_item_sort_order":9,"ainumber":"5.1","ainame":"CT4 Led WIs","tdoc_agenda_sort_order":42210,"status":"revised","reservation_date":"2023-09-28 12:02:26","uploaded":"2023-09-29 11:17:54","revisionof":"","revisedto":"C4-234416","release":"Rel-18","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_ct\/WG4_protocollars_ex-CN4\/TSGCT4_118_Xiamen\/Docs\/C4-234221.zip","group":"C4","meeting":"C4-118","year":2023,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"C4-234224","title":"Modified PRINS for roaming service providers in 5G","source":"Vodafone GmbH","contact":"Marco Broszeit","contact-id":82883,"tdoctype":"WID new","for":"Agreement","abstract":"GSMA requests (SP-230351-53 and SP-230376 \/S3-231717-21)  and SA (SP-231190) started the discussion about roaming hubs and modified PRINS. This WID shall enable CT4 to raise questions early  to SA2 and other Groups.\n\n3GPP defined the Security Edge Protection Proxy (SEPP) as a non-transparent proxy that supports message filtering and policing on inter-PLMN control plane interfaces as well as topology hiding (see TS 23.501 clause 6.2.17) for the 5G SA roaming and interconnect. The related SEPP impacting security requirements and solutions following the 5G system (5GS) e2e service architecture are captured in TS 33.501. \nRoaming and interconnect services are important parts of the mobile ecosystem. The roaming services infrastructure provided by the mobile operator to its subscribers typically utilizes 3rd parties. IP interconnect exchange (IPX), roaming hub (RH) as well as RVAS (roaming value-added service) providers make available roaming services to the MNO with efficiency and scalability. The current 5G System provides for end-to-end secure design.  This design is divergent from the established 2G\/3G\/4G roaming ecosystem with its hop-by-hop approach via intermediaries without end-to-end security.\nAccording to GSMA requests (SP-230351-53 and SP-230376 \/S3-231717-21) there are several use cases foreseen in the 5G system to support subscriber roaming services by the mobile operators:\n-\tDelegation of a PLMN's SEPP to an intermediate provider (aka: SEPP Hosting), with or without a SEPP deployed in the mobile operator\/PLMN.   \n-\tDelegation of roaming related services (all or partial services), contractual agreements, financial liability to a trusted 3rd party (Roaming Hub).  \n-\tAbility to support deployment models in parallel, including the capability for the PLMN to use bi-lateral direct interconnections, delegation of SEPP functionality, and use of a 3rd party to provide roaming service on a per partner PLMN basis.\nWhile the existing services could be provided using methods (similar to 2G\/3G\/4G networks) in a hop-by-hop manner utilizing TLS, the 5GS specifications do not support 3rd party entities from offering the same or similar services over 5G.  It is also observed that existing 3GPP service requirements and functionalities of 5G do not cover the support of those specific roaming services use cases.\n\nThe objective of this feature is to enable roaming service providers in 5G systems. This work item covers \n\n-\tImplementation details (stage 3) aspects to support a roaming service provider approach and specify related message flows; \n-\tDetails on the modified PRINS message flows to enable roaming intermediaries; and\n-\tEnable CT4 to ask for clarification as the approach is still under discussion on earlier stages.","secretary_remarks":"","agenda_item_sort_order":9,"ainumber":"5.1","ainame":"CT4 Led WIs","tdoc_agenda_sort_order":42240,"status":"withdrawn","reservation_date":"2023-09-28 13:53:26","uploaded":"2023-09-29 12:06:06","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_ct\/WG4_protocollars_ex-CN4\/TSGCT4_118_Xiamen\/Docs\/C4-234224.zip","group":"C4","meeting":"C4-118","year":2023,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"C4-234416","title":"New SID on supporting SMF load balance redundancy for 5G VN group communication","source":"China Mobile","contact":"Kimmo Kymalainen","contact-id":85426,"tdoctype":"SID new","for":"Approval","abstract":"","secretary_remarks":"","agenda_item_sort_order":9,"ainumber":"5.1","ainame":"CT4 Led WIs","tdoc_agenda_sort_order":42211,"status":"withdrawn","reservation_date":"2023-09-10 03:21:38","uploaded":null,"revisionof":"C4-234221","revisedto":"","release":"Rel-18","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"","group":"C4","meeting":"C4-118","year":2023,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"C4-234646","title":"New WID on NRF API enhancements to avoid signalling and storing of redundant data","source":"Nokia, Nokia Shanghai Bell","contact":"Kimmo Kymalainen","contact-id":85426,"tdoctype":"WID new","for":"Agreement","abstract":"","secretary_remarks":"","agenda_item_sort_order":9,"ainumber":"5.1","ainame":"CT4 Led WIs","tdoc_agenda_sort_order":0,"status":"agreed","reservation_date":"2023-12-10 07:00:03","uploaded":"2023-10-12 09:31:06","revisionof":"C4-234415","revisedto":"","release":"","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_ct\/WG4_protocollars_ex-CN4\/TSGCT4_118_Xiamen\/Docs\/C4-234646.zip","group":"C4","meeting":"C4-118","year":2023,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0}]