Proposed UE-LMF Interactions for Stage 3 Implementation

Background and proposed way forward for UE-LMF interactions including SL-MO-LR, SL-MT-LR, RSPP Capability Transfer, Assistance Data Transfer, and Location Information Transfer. Proposal for stage 3 implementation focusing on SLPP messages, SL-MO-LR, SL-MT-LR, embedded SLPP messages, and payload containers. Extending specifications for DL and UL.

• UE-LMF
• Interactions
• Stage 3
• Implementation
• Proposal

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Uploaded on Feb 21, 2025 | 0 Views

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1. Ranging_SL UE-LMF interactions Tingfang Tang(Rapportuer)

2. Background & Proposed way fwd UE-LMF interactions include the following as shown in Annex1 SL-MO-LR request/response SL-MT-LR request/response RSPP Capability Transfer as shown in Annex2(NOTE1) RSPP Assistance Data Transfer as shown in Annex3(NOTE1) RSPP Location Information Transfer as shown in Annex4 (NOTE1) NOTE1: Both 1) Only SLPP messages for UE1 and/or NOTE1: Both 1) Only SLPP messages for UE1 and/or UEx messages for UE1 and/or messages for UE1 and/or UEx Transfer Transfer only 1) described in stage 2 specification, for Location Information Transfer, both 1) and 2) described only 1) described in stage 2 specification, for Location Information Transfer, both 1) and 2) described in stage stage 2 specification. 2 specification. UEx(s) in one NAS message, and 2) Other information, plus SLPP (s) in one NAS message, and 2) Other information, plus SLPP UEx(s) in one NAS message may be supported. For Capability Transfer/Assistance (s) in one NAS message may be supported. For Capability Transfer/Assistance Data Data in

3. Background & Proposed way fwd Proposal 1 for stage 3 implementation of the UE-LMF interactions Only SLPP messages for UE1 Only SLPP messages for UE1 and/or and/or UEx Other information, plus SLPP messages for UE1 and/or Other information, plus SLPP messages for UE1 and/or UEx UEx UEx SL-MO-LR LCS-SS payload container for SL-MO-LR with embedded SLPP message(s)(NOTE2) SL-MT-LR LCS-SS payload container for SL-MT-LR with embedded SLPP message(s)(NOTE2) Capability Transfer SLPP payload container(NOTE4) Assistance Data Transfer SLPP payload container(NOTE4) Location Information Transfer SLPP payload container(NOTE4) LCS-SS payload container for RSPP signaling transfer(NOTE3) NOTE2: NOTE2: the embedded SLPP message is included in the similar way to that for embedded LPP message (multiplePositioningProtocolPDUs) NOTE3: NOTE3: LCS-SS payload container for RSPP signaling transfer can be a general one used for Capability Transfer/Assistance Data Transfer/Location Information Transfer NOTE4: Extending 5.2.1.6 of 24.571 for DL, and extending 5.2.2.10 of 24.571 for UL. NOTE4: Extending 5.2.1.6 of 24.571 for DL, and extending 5.2.2.10 of 24.571 for UL.

4. Background & Proposed way fwd Proposal 2 for stage 3 implementation of the UE-LMF interactions Only SLPP Only SLPP message(s) for UE1 message(s) for UE1 Only SLPP message(s) for other UE(s) Only SLPP message(s) for other UE(s) (may include SLPP message for UE1) (may include SLPP message for UE1) Other information, plus SLPP messages Other information, plus SLPP messages for UE1 and/or for UE1 and/or UEx UEx SL-MO-LR LCS-SS payload container for SL-MO-LR with embedded SLPP message(s)(NOTE2) SL-MT-LR LCS-SS payload container for SL-MT-LR with embedded SLPP message(s)(NOTE2) Capability Transfer SLPP payload container(NOTE4) LCS-SS payload container for RSPP signaling transfer(NOTE3) Assistance Data Transfer SLPP payload container(NOTE4) LCS-SS payload container for RSPP signaling transfer(NOTE3) Location Information Transfer SLPP payload container(NOTE4) LCS-SS payload container for RSPP signaling transfer(NOTE3) LCS-SS payload container for RSPP signaling transfer(NOTE3) NOTE2: NOTE2: the embedded SLPP message is included in the similar way to that for embedded LPP message (multiplePositioningProtocolPDUs) NOTE3: NOTE3: LCS-SS payload container for RSPP signaling transfer can be a general one used for Capability Transfer/Assistance Data Transfer/Location Information Transfer NOTE4: Extending 5.2.1.6 of 24.571 for DL, and extending 5.2.2.10 of 24.571 for UL. NOTE4: Extending 5.2.1.6 of 24.571 for DL, and extending 5.2.2.10 of 24.571 for UL.

5. Proposed way fwd for SLPP payload container Proposal 3 for stage 3 implementation of SLPP payload container (if no concern on extending 5.2.1.6 of 24.571 for DL, and extending 5.2.2.10 of 24.571 for UL to transfer SLPP message(s) for other UEs of 24.571 for DL, and extending 5.2.2.10 of 24.571 for UL to transfer SLPP message(s) for other UEs described in proposal 1) described in proposal 1): Option1: Application layer ID visible to the AMF, correlated UE ID included outside of the payload container content. Option2: Application layer ID not visible to the AMF, correlated UE ID included as part of the payload container content f no concern on extending 5.2.1.6

6. Annex1: UE-LMF interactions GMLC UEn UE2 UE1 NG-RAN AMF LMF 0a. SL-MO-LR request 1a. Namf_Location_ProvidePositioningInfo Request 2a. Location Request 1b. SL-MT-LR request (application layer IDs of the other UEs 2 to n, the types of required location results, indication of Target UE/LMF selecting Located UE) 1c. SL-MT-LR response ( UEs 2 to n discovered, SLPPs for capabilities of the discovered UEs) 3b. SLPP Capability Transfer 3a. RSPP Capability Transfer 4b. SLPP Assistance Data Transfer 4a. RSPP Assistance Data Transfer 6b. SLPP Location Information Transfer 5a. RSPP Location Information Transfer 2b. Location Response 0b. SL-MO-LR response 1d. Namf_Location_ProvidePositioningInfo Response

7. Annex2: Capabilities exchange for UE-LMF UEn UE2 UE1 NG-RAN AMF LMF 1. SL-MO-LR or SL-MT-LR procedure triggered 2. Location Request 1: Capability Transfer Implementation1: Capabilities for all Ues requested via corresponding SLPP message in one NAS message 3. Supplementary RSPP Transfer (SLPP for UE1, SLPPs of Request Capability for Other UEs) 3a. Supplementary RSPP Transfer (SLPP of Request Capability for Uen ) 3b. Supplementary RSPP Transfer(SLPP of Request Capability for Ue2 ) 3c. Supplementary RSPP Transfer(SLPP of Provide Capabilities for UEn) 3d. Supplementary RSPP Transfer (SLPP of Provide Capabilities for UE2) 3e. Supplementary RSPP Transfer (SLPP for UE1, SLPPs of Provide Capability for Other UEs) 2: Capability Transfer Implementation2: Capabilities for UE1 and other UEsrequested via corresponding SLPP message in 2 NAS messages 3. Supplementary RSPP Transfer (SLPPs of Request Capability for Other UEs) 3a. Supplementary RSPP Transfer (SLPP of Request Capability for Uen ) 3b. Supplementary RSPP Transfer(SLPP of Request Capability for Ue2 ) 3c. Supplementary RSPP Transfer(SLPP of Provide Capabilities for UEn) 3d. Supplementary RSPP Transfer (SLPP of Provide Capabilities for UE2) 3e. Supplementary RSPP Transfer (SLPP for UE1, SLPPs of Provide Capability for Other UEs) 3f. Supplementary RSPP Transfer (SLPP for UE1) 3g. Supplementary RSPP Transfer (SLPP of Provide Capability for UE1) 3: Capability Transfer Implementation3: Capabilities for UE1 and other UEsrequested via corresponding SLPP message in n NAS messages 3a. Supplementary RSPP Transfer (SLPP for UE1) 3b. Supplementary RSPP Transfer (SLPP of Provide Capability for UE1) 3c. Supplementary RSPP Transfer (SLPP of Request Capability for UEx) 3d. Supplementary RSPP Transfer(SLPP of Request Capability for UEx ) 3e. Supplementary RSPP Transfer (SLPP of Provide Capabilities for UEx) 3f. Supplementary RSPP Transfer (SLPP of Provide Capability for UEx) 3x1. Supplementary RSPP Transfer (SLPP of Request Capability for UEy) 3x2. Supplementary RSPP Transfer(SLPP of Request Capability for UEy ) 3x3. Supplementary RSPP Transfer (SLPP of Provide Capabilities for UEy) 3x4. Supplementary RSPP Transfer (SLPP of Provide Capability for UEy)

8. Annex3: Assistance data exchange for UE-LMF UEn UE2 UE1 NG-RAN AMF LMF 1. SL-MO-LR or SL-MT-LR procedure triggered 2. Location Request 3. Capabilities Exchange 1: Assistance data excchange Implementation1: Assistance data for all Ues requested via corresponding SLPP message in one NAS message 4a. Supplementary RSPP Transfer (SLPP of Request Assistance Data for UEn ) 4b. Supplementary RSPP Transfer (SLPP of Request Assistance Data for UE2) 4c. Supplementary RSPP Transfer (SLPP for UE1, SLPPs of Request Assistance Data for all other UEs) 4d. Supplementary RSPP Transfer (SLPP for UE1, SLPPS of Provide Assistance Data for A ll other UEs) 4e. Supplementary RSPP Transfer(SLPP of Provide Assistance Data for UEn) 4f. Supplementary RSPP Transfer(SLPP of Provide Assistance Data for UE2 ) 2: Assistance data excchange Implementation1: Assistance data for all Ues requested via corresponding SLPP message in 2 NAS message 4a. Supplementary RSPP Transfer (SLPP of Request Assistance Data for UEn ) 4b. Supplementary RSPP Transfer (SLPP of Request Assistance Data for UE2) 4c. Supplementary RSPP Transfer (SLPPs of Request Assistance Data for all other UEs) 4d. Supplementary RSPP Transfer (SLPPS of Provide Assistance Data for A ll other UEs) 4e. Supplementary RSPP Transfer(SLPP of Provide Assistance Data for UEn) 4f. Supplementary RSPP Transfer(SLPP of Provide Assistance Data for UE2 ) 4g. Supplementary RSPP Transfer (SLPP for UE1 to Request Assistance Data) 4h. Supplementary RSPP Transfer (SLPP of Provide Assistance Data for UE1) 3: Assistance data excchange Implementation1: Assistance data for all Ues requested via corresponding SLPP message in n NAS message 4g. Supplementary RSPP Transfer (SLPP for UE1 to Request Assistance Data) 4h. Supplementary RSPP Transfer (SLPP of Provide Assistance Data for UE1) 4a. Supplementary RSPP Transfer (SLPP of Request Assistance Data for UEn ) 4c. Supplementary RSPP Transfer (SLPP of Request Assistance Data for UEn) 4d. Supplementary RSPP Transfer (SLPP of Provide Assistance Data for UEn) 4e. Supplementary RSPP Transfer(SLPP of Provide Assistance Data for UEn) 4b. Supplementary RSPP Transfer (SLPP of Request Assistance Data for UE2) 4c. Supplementary RSPP Transfer (SLPP of Request Assistance Data for UE2) 4d. Supplementary RSPP Transfer (SLPPS of Provide Assistance Data for UE2) 4f. Supplementary RSPP Transfer(SLPP of Provide Assistance Data for UE2 )

9. Annex4: Location information exchange for UE-LMF UEn UE2 UE1 NG-RAN AMF LMF 1. SL-MO-LR or SL-MT-LR procedure triggered 2. Location Request 3. Capabilities Exchange 4. Assistance data Exchange A:For UE based, only location information for UE1 is requested by LMF via NAS 5a. Supplementary RSPP Transfer (SLPP of Request Location Information for UE1, indication of UE based Sidelink Positioning, list of candidate Located UE(s), the scheduled location time) Note: list of candidate Located UE(s), the scheduled location time) are optional 5b. Location information exchange between UE1 and UEx 5c. Supplementary RSPP Transfer (SLPP of Provide Location Information for UEn for UE1) B: For network based, location information for all the UEs are requested by LMF via NAS B1: location information Transfer Implementation1: location information for all Ues requested via corresponding SLPP message in one NAS message 5a. Supplementary RSPP Transfer (SLPP for UE1, SLPPs of Request location information for Other UEs) 5b. Supplementary RSPP Transfer (SLPP of Request location information for Uen ) 5c. Supplementary RSPP Transfer(SLPP of Request location information for Uen ) 5d. Supplementary RSPP Transfer(SLPP of Provide location information for UEn) 5e. Supplementary RSPP Transfer (SLPP of Provide location information for UE2) 5f. Supplementary RSPP Transfer (SLPP for UE1, SLPPs of Provide location information for Other UEs) B2: Location information Transfer Implementation2: Location information for UE1 and other Ues requested via corresponding SLPP message in 2 NAS messages 5. Supplementary RSPP Transfer (SLPPs of Request location information for Other UEs) 5a. Supplementary RSPP Transfer (SLPP of Request location information for UEn ) 5b. Supplementary RSPP Transfer(SLPP of Request location information for UE2 ) 5c. Supplementary RSPP Transfer(SLPP of Provide location information for UEn) 5d. Supplementary RSPP Transfer (SLPP of Provide location information for UE2) 5e. Supplementary RSPP Transfer (SLPP for UE1, SLPPs of Provide location information for Other UEs) 5f. Supplementary RSPP Transfer (SLPP of Request location information for UE1) 5g. Supplementary RSPP Transfer (SLPP of Provide location information for UE1) B3: Location information Transfer Implementation3: Location information for UE1 and other Ues requested via corresponding SLPP message in n NAS messages 5a. Supplementary RSPP Transfer (SLPP for UE1) 5b. Supplementary RSPP Transfer (SLPP of Provide location information for UE1) 5c. Supplementary RSPP Transfer (SLPP of Request location information for UEx) 5d. Supplementary RSPP Transfer(SLPP of Request location information for UEx ) 5e. Supplementary RSPP Transfer (SLPP of Provide location information for UEx) 5f. Supplementary RSPP Transfer (SLPP of Provide location information for UEx) 5x1. Supplementary RSPP Transfer (SLPP of Request location information for UEy) 5x2. Supplementary RSPP Transfer(SLPP of Request location information for UEy ) 5x3. Supplementary RSPP Transfer (SLPP of Provide location information for UEy) 5x4. Supplementary RSPP Transfer (SLPP of Provide location information for UEy)