[{"name":"R5-255775","title":"URI to address the UE in a PSAP callback","source":"MCC TF160","contact":"Olivier Genoud","contact-id":58316,"tdoctype":"discussion","for":"Endorsement","abstract":"At RAN5#108 clarification has been added to TS 34.229-1 and TS 34.229-5 that the PSAP callback in conformance test cases happens using the PDN\/PDU session of normal IMS (R5-254971, R5-254978). In the INVITE of the PSAP callback the UE is still addressed by the contact address which has been provided in the INVITE of the eCall. But this contact address belongs to the emergency PDN or PDU session._x000D_\n_x000D_\n2\tIssue_x000D_\nAt eCall establishment the Contact header field of the INVITE typically contains the IP address of the UE as assigned at establishment of the PDN connectivity or PDU session. _x000D_\n? In general, this contact address belongs to the emergency PDN or PDU session and it is not a realistic network behaviour to use it to address the UE in the PSAP callback performed on the normal IMS. _x000D_\nInstead in a real network the following has been observed:_x000D_\n1.\tThe PSAP receives the MO INVITE for the eCall. The PSAP takes the From header field as identity (URI) of the caller._x000D_\n2.\tFor the PSAP callback, the PSAP uses this URI as Request-URI and in the To header field of the INVITE._x000D_\n3.\tThe To header field is kept unchanged by the SIP core whereas the UE associated S-CSCF will replace the MT INVITE Request-URI with the UE registered Contact address associated with the normal IMS PDN \/ PDU session. _x000D_\n4.\tThe P-CSCF will forward the MT INVITE request to the UE via the normal IMS PDN \/ PDU session._x000D_\n_x000D_\n3\tProposal_x000D_\nIn the MT INVITE of the PSAP callback, the following identities shall be used: _x000D_\n\u2022\tRequest-URI: the contact address provided by the UE in the REGISTER for normal IMS PDN \/ PDU session._x000D_\n\u2022\tTo header: UE ID included in the From header of MO INVITE for the eCall.","secretary_remarks":"","agenda_item_sort_order":993,"ainumber":"6.3.27.14","ainame":"Discussion Papers, Work Plan, TC lists","tdoc_agenda_sort_order":577500,"status":"revised","reservation_date":"2025-05-11 07:36:06","uploaded":"2025-11-07 12:38:09","revisionof":"","revisedto":"R5-256668","release":"","crspec":"","crspecversion":"","workitem":[{"winame":"eCallCEN-UEConTest"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_ran\/WG5_Test_ex-T1\/TSGR5__109_Dallas\/Docs\/R5-255775.zip","group":"R5","meeting":"R5-109","year":2025,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0},
{"name":"R5-256668","title":"URI to address the UE in a PSAP callback","source":"MCC TF160","contact":"Ingbert Sigovich","contact-id":28887,"tdoctype":"discussion","for":"Endorsement","abstract":"","secretary_remarks":"","agenda_item_sort_order":993,"ainumber":"6.3.27.14","ainame":"Discussion Papers, Work Plan, TC lists","tdoc_agenda_sort_order":577501,"status":"noted","reservation_date":"2025-01-12 13:39:42","uploaded":"2025-12-01 13:41:12","revisionof":"R5-255775","revisedto":"","release":"","crspec":"","crspecversion":"","workitem":[{"winame":"eCallCEN-UEConTest"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_ran\/WG5_Test_ex-T1\/TSGR5__109_Dallas\/Docs\/R5-256668.zip","group":"R5","meeting":"R5-109","year":2025,"uicc_affected":"","me_affected":"","ran_affected":"","cn_affected":"","clauses_affected":"","crsinpack":null,"crsinpacknumber":0}]