[{"name":"S2-2203648","title":"LS from CT WG4: LS on Indication of Network Assisted Positioning method","source":"CT WG4","contact":"Hao Jing","contact-id":83214,"tdoctype":"LS in","for":"Action","abstract":"CT WG4 has implemented some features of ID_UAS, 5G_eLCS_ph2 defined in stage 2 and would like to request following clarifications from SA WG3, SA WG2: TS 33.256 defined the Location information veracity and location tracking authorization in 5GS in clause 5.3.2 as below: 1. The USS sends the location request to UAS NF\/NEF to request the UAV location or presence from network. The location request includes the GPSI of the UAV to request the location information or presence about an individual UE, or a geographic area when trying to find the information of all UAVs in an area. The LCS request also indicates the 5GS to obtain location information with high reliability. If the USS\/TPAE does not specify target 3GPP UAV ID and request UAS NF for a list of the UAVs in the geographic area and served by the PLMN, clause 5.3.1.3 and 5.3.4 in TS 23.256 [3] apply. 2. The UAS NF\/NEF first verifies the request in step 1 is authorised. When the USS sends a GPSI, this is done by checking whether the identifier of the USS sending the request matches the previously associated mapping between the GPSI and the USS identifier. When the USS request UAS NF for a list of the UAVs in the geographic area, this is done by checking the USS is authorised to receive the CAA level ID of all UAVs in a geographic area indicated by the USS. The UAS NF\/NEF gets the relevant UAV(s) location information or presence from AMF or GMLC by the current location services supported by AMF or GMLC if passes the above authorisation check. On the condition of the location services provided by AMF, the UE presence status is provided by reusing the Area of Interest mechanism. On the condition of the location services provided by GMLC, the GMLC indicates LMF via AMF to select Network Assisted Positioning method which relies on the location measurement from NG-RAN nodes, if receiving high reliability requirement in step 1. However, there is no clear definition of high reliability requirement in Stage2. There are 2 alternatives for implementation of this indication in CT WG4. - If the positioning for UAS requires (or will potentially require in future) some specific treatment in GMLC\/LMF, it is better to extend the LCS service type by Stage 1 and Stage 2. - If only the high reliability requirement is needed, i.e. the UAS NF\/NEF will either use AMF with PRA mechanism or using GMLC\/AMF\/LMF with network assisted positioning, then an indication on GMLC API implemented by CT WG4 is sufficient. CT WG4 would like to ask SA WG3, SA WG2 kindly clarify the scenario and the definition of above high reliability requirement in stage 2, thus help CT WG4 to select the appropriate alternative in stage 3 implementation. Action: CT WG4 kindly asks SA WG3 and SA WG2 to clarify the above question.","secretary_remarks":"Responses drafted in S2-2204174, S2-2204459. Final response in S2-2204744","agenda_item_sort_order":57,"ainumber":"8.14","ainame":"Enhancement to the 5GC LoCation Services-Phase 2 (5G_eLCS_Ph2)","tdoc_agenda_sort_order":12660,"status":"replied to","reservation_date":"2022-04-21 14:48:20","uploaded":"2022-04-22 05:13:38","revisionof":"","revisedto":"","release":"Rel-17","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"SA WG2, SA WG3","Cc":"SA WG1","lsoriginalls":"C4-222306","lsreply":"S2-2204744","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_151E_Electronic_2022-05\/Docs\/S2-2203648.zip","group":"S2","meeting":"S2-151-e","year":2022,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2204174","title":"[DRAFT] LS reply on Indication of Network Assisted Positioning method","source":"Huawei, HiSilicon","contact":"Marco Spini","contact-id":8356,"tdoctype":"LS out","for":"Approval","abstract":"Alternative 2 is recommended to satisfy the requirement of SA WG3. Response to S2-2203648","secretary_remarks":"Response to S2-2203648. Merged into S2-2205292","agenda_item_sort_order":57,"ainumber":"8.14","ainame":"Enhancement to the 5GC LoCation Services-Phase 2 (5G_eLCS_Ph2)","tdoc_agenda_sort_order":12670,"status":"merged","reservation_date":"2022-05-06 08:02:50","uploaded":"2022-05-06 10:06:45","revisionof":"","revisedto":"","release":"Rel-17","crspec":"","crspecversion":"","workitem":[{"winame":"ID_UAS"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"CT WG4, SA WG3 SA WG1","Cc":"CC: SA WG1","lsoriginalls":"","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_151E_Electronic_2022-05\/Docs\/S2-2204174.zip","group":"S2","meeting":"S2-151-e","year":2022,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2204459","title":"[DRAFT] LS OUT on Indication of Network Assisted Positioning method","source":"Nokia, Nokia Shanghai Bell","contact":"Pallab Gupta","contact-id":87959,"tdoctype":"LS out","for":"Approval","abstract":"To: CT WG4. CC: SA WG3, SA WG1. Response to S2-2203648","secretary_remarks":"Response to S2-2203648. r04 agreed. Revised to S2-2204744, merging S2-2204470","agenda_item_sort_order":57,"ainumber":"8.14","ainame":"Enhancement to the 5GC LoCation Services-Phase 2 (5G_eLCS_Ph2)","tdoc_agenda_sort_order":12680,"status":"revised","reservation_date":"2022-05-06 12:58:42","uploaded":"2022-05-06 13:18:40","revisionof":"","revisedto":"S2-2204744","release":"Rel-17","crspec":"","crspecversion":"","workitem":[{"winame":"ID_UAS"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"CT WG4 SA WG3, SA WG1","Cc":"CC: SA WG3, SA WG1","lsoriginalls":"C4-222306","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_151E_Electronic_2022-05\/Docs\/S2-2204459.zip","group":"S2","meeting":"S2-151-e","year":2022,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0},
{"name":"S2-2204744","title":"LS OUT on Indication of Network Assisted Positioning method","source":"SA WG2","contact":"Pallab Gupta","contact-id":87959,"tdoctype":"LS out","for":"Approval","abstract":"To: CT WG4, SA WG3. CC: SA WG1","secretary_remarks":"Revision of S2-2204459r04, merging S2-2204470. Approved","agenda_item_sort_order":57,"ainumber":"8.14","ainame":"Enhancement to the 5GC LoCation Services-Phase 2 (5G_eLCS_Ph2)","tdoc_agenda_sort_order":12690,"status":"approved","reservation_date":"2022-05-23 07:09:47","uploaded":"2022-05-24 08:11:20","revisionof":"S2-2204459","revisedto":"","release":"Rel-17","crspec":"","crspecversion":"","workitem":[{"winame":"ID_UAS"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"S2-2203648","lsto":"CT WG4, SA WG3","Cc":"SA WG1","lsoriginalls":"C4-222306","lsreply":"","link":"https:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_151E_Electronic_2022-05\/Docs\/S2-2204744.zip","group":"S2","meeting":"S2-151-e","year":2022,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]