Content for  TS 23.586  Word version:  18.5.0

In addition to the functions defined in TS 23.287 and TS 23.304, the UE may support the following functions:

• Reporting the following Ranging/SL Positioning related capabilities to 5GC over the N1 reference point:
  • Capability of supporting Ranging/SL Positioning over PC5 indicating that the UE supports:
    • Ranging/SL Positioning operations over PC5 (i.e., for Target UE and SL Reference UE);
    • Located UE;
    • SL Positioning Server UE.
• Procedures to Ranging/SL Positioning service exposure.
• Indicating UE Policy Provisioning Request in UE Policy Container for UE triggered Ranging/SL Positioning Policy provisioning, which requests one or multiple types of policies/parameters as listed below:
  • Policy/parameters for Ranging/SL Positioning operations over PC5 (i.e. for Target UE and SL Reference UE);
  • Policy/parameters for Located UE;
  • Policy/parameters for SL Positioning Client UE;
  • Policy/parameters for SL Positioning Server UE.
• Receiving the Ranging/SL Positioning Policy from 5GC over N1 reference point.
• For UE-only Operation, determine Ranging/SL positioning method based on the positioning QoS requirement, UE's Ranging/Sidelink Positioning capability.
• Configuration of parameters for Ranging/SL Positioning over PC5. These parameters can be pre-configured in the UE, or, if in coverage, provisioned or updated by signalling over the N1 reference point from the PCF in the HPLMN or over SR1 reference point from the Ranging/SL Positioning Application Server.
• Receiving the serving network supporting Ranging/SL Positioning in Registration Accept.

In addition to the functions defined in TS 23.501 and TS 23.503, the PCF includes functions to provision the UE with necessary policies and parameters to use Ranging/SL Positioning services, as part of the UE Ranging/SL Positioning Policy information as defined in clause 4.2.2 of TS 23.503:

• Authorization policy and parameters for Ranging/Sidelink Positioning UE Discovery;
• Authorization policy and parameters for Ranging/SL Positioning over PC5;
• Authorization policy and parameters for Network based SL Positioning, and Network assisted SL Positioning;
• Authorization policy and parameters for Ranging/SL Positioning service exposure.

The PCF may update the Ranging/SL Positioning to the UE under certain conditions. When receiving the Ranging/SL Positioning in Npcf_UEPolicyControl_Create Request from the AMF or when receiving the updated subscription data from UDR, the PCF generates the PC5 QoS parameters for RSPP transport over PC5 reference point used by NG-RAN corresponding to a UE as defined in clause 5.4.2 of TS 23.287.

In addition to the functions defined in TS 23.287 and TS 23.304, the AMF performs the following functions:

• Select a PCF supporting Ranging/SL positioning Policy/Parameter provisioning based on indication of Ranging/SL positioning Capability as part of the 5G ProSe Capability/V2X capability in the "5GMM capability" in the Registration Request.
• Store the Ranging/SL positioning Capability.
• Select the LMF supporting Ranging/SL positioning and forward the Ranging/SL positioning Capability of Target UE to LMF.
• Select a GMLC supporting Ranging/SL positioning and request the GMLC for Ranging/SL Positioning result.
• Forward the Ranging/SL positioning Capability to PCF.
• Obtain from UDM the subscription information related to Ranging/SL positioning and store them as part of the UE context data.
• Obtain from UDM the subscription information related to Ranging/SL positioning and store them as part of the UE context data.
• Provision the NG-RAN with indication about the UE authorization status about Ranging/SL Positioning over PC5.
• Provision the NG-RAN with "Ranging/SL Positioning authorised" information.
• Indicate the UE serving network supports Ranging/SL Positioning.

In addition to the functions defined in TS 23.287 and TS 23.304, the UDM performs the following functions:

• Subscription management for Ranging/SL Positioning over PC5.
• Subscription management for Ranging/SL Positioning service exposure.
• Containing UE Ranging/SL Positioning privacy profile.

In addition to the functions defined in TS 23.287 and TS 23.304, the UDR performs the following functions:

• Stores Ranging/SL Positioning service parameters.
• Stores the mapping between Application Layer ID and GPSI provisioned by AF.

In addition to the functions defined in TS 23.287 and TS 23.304, the NRF performs the following functions:

• PCF discovery by considering Ranging/SL Positioning Capability.
• LMF discovery by considering Ranging/SL Positioning Capability.

In addition to the functions defined in TS 23.287 and TS 23.304, the NEF supports the following:

• To enable AFs to provide service specific information to the 3GPP network, the NEF supports additional service parameters for Ranging/SL Positioning policy which can use the description of the clause 6.2.5 in TS 23.304.
• Interacting with GMLC for AFs and UEs in Ranging/SL Positioning procedures to perform 5GC-MT-LR (e.g. Forward location request from the AF including GPSI or Application Layer ID).
• Update the UE subscription data stored in the UDR with Onboarding Enrolment Information.
• Provide the GMLC with the GPSI of the UE based on Application Layer ID and ID mapping information stored in UDR application data.
• Provide the GMLC with the Application Layer ID based on GPSI of the UE and ID mapping information stored in UDR application data.
• Request UDR to store as application data the GPSI and Application Layer ID mapping information provisioned by AF.
• Support UE Ranging/SL Positioning privacy profile provision from the AF.

In addition to the functions defined in TS 23.273, the LMF supports the following:

• The Network based SL Positioning and Network assisted SL Positioning;
  • Determine using the Network based SL Positioning or Network assisted SL Positioning.
  • Trigger Ranging/Sidelink positioning.
  • Exchange the Ranging/Sidelink Positioning capability.
  • Exchange the Ranging/Sidelink Positioning assistant data.
  • Exchange Ranging/Sidelink positioning signal measurement data/result.
  • Support of receiving stored Ranging/Sidelink Positioning capability from AMF and support of providing updated Ranging/Sidelink Positioning capability to AMF.
  • Determine to apply UE based Sidelink Positioning or Network based SL Positioning.
  • Determine to use both Ranging/SL Positioning and Uu absolute Positioning based on the QoS requirement to obtain the location results (e.g. relative locations or distances and/or directions related to the UEs as defined in clause 4.4).
  • Determine to use Uu absolute Positioning to obtain the location results (as defined in clause 4.4) when the Ranging/SL Positioning fails.
  • Determine that Target UE or LMF selects Located UE.
  • Determine Ranging/SL positioning method based on the positioning QoS requirement of Target UE or Ranging/SL Positioning QoS requirement, UE's Ranging/Sidelink Positioning capability.
  • Determine the required QoS for Located UE positioning.
  • If the scheduled location time is absent, optionally determine the same scheduled location time for the Ranging/SL positioning and the positioning of the Located UE(s).
  • Determine the location of the Target UE based on the Ranging/SL positioning measurement data and the location of Located UE(s) for Network based SL Positioning, or based on result reported by SL Positioning Server UE for Network assisted SL Positioning.
  • Interaction with GMLC to get the location of Located UE/SL Reference UE using the Application Layer ID.
• Delivering the Ranging/Sidelink positioning service request/response for the Ranging service exposure to UE.

In addition to the functions defined in TS 23.273, the GMLC supports the following:

• enable trusted AFs and NFs to perform MT-LR by accessing GMLC directly with additional service parameters for Ranging/SL Positioning.
• enable AFs and NFs to perform MT-LR by accessing GMLC through NEF with additional service parameters for Ranging/SL Positioning.
• determine the serving AMF instances for the UEs involved in the Ranging/SL Positioning request and forward the request to respective serving AMF.
• receive response from AMF and event reports from and return Ranging/SL Positioning result to NFs and AFs.
• perform Application Layer ID to GPSI or GPSI to Application Layer ID resolution by querying NEF.
• use UE's Ranging/SL Positioning privacy profile received from UDM for verifying UE privacy.
• request Home GMLC of the UE(s) that belong to different PLMN(s) to retrieve the mapping information between GPSI and Application Layer ID (if needed) and to check those UE's Ranging/SL Positioning privacy profile.

In addition to the functions defined in TS 23.501, the AF supports the following:

• Provision mapping between Application Layer ID and GPSI to UDR in application data.
• Provision the Ranging/Sidelink positioning service specific information.

Location results that may be obtained for a target UE are summarized here and defined in more detail in TS 23.032.

A range refers to a straight line distance between the target UE and another UE, such as another target UE, a Located UE or a Reference UE. A direction refers to a direction to the target UE from another UE, such as another target UE, a Located UE or a Reference UE. A direction may also refer to a direction from the target UE to another UE, such as another target UE, a Located UE or a Reference UE.

A relative location refers to the location of a target UE relative to a network element or another UE. The relative location can be relative 2D location with uncertainty ellipse defined in clause 5.11 of TS 23.032, or it can also be Relative 3D Location with uncertainty ellipsoid defined in clause 5.12 of TS 23.032.

A relative velocity refers to the velocity of a target UE relative to another UE. A relative velocity of a target UE includes a radial component between the target UE and the other UE and a transverse component at right angles to the radial component. The detailed definition of Relative Velocity is defined in clause 8.4a of TS 23.032.