9 General Network Positioning Procedures
23.2713GPPFunctional stage 2 description of Location Services (LCS)Release 17TS
The generic network positioning procedure of providing the location information of an UE subscriber can be partitioned into the following procedures.
Location Preparation Procedure
This generic procedure is concerned with verifying the privacy restrictions of the UE subscriber, reserving network resources, communicating with the UE to be located and determining the positioning method to be used for locating the UE subscriber based on the requested QoS and the UE and network capabilities.
Positioning Measurement Establishment Procedure
This procedure is concerned with performing measurements by involving the necessary network and/or UE resources. Depending on the positioning method to be used for locating the UE the internals of this procedure can be positioning method dependent. The procedure is completed with the end of the positioning measurements.
Location Calculation and Release Procedure
This generic procedure is initiated after the measurements are completed and is concerned with calculating the location and optionally, velocity of the UE and releasing all network and/or UE resources involved in the positioning.
Each of the following procedures defines the support of a single location request (MT‑LR, MO‑LR or NI‑LR) that may be immediate or deferred. Treatment alternatives for a new location request when other concurrent locations requests are already ongoing for the same target UE is not generally defined in these procedures except in certain specific cases. For such general treatment alternatives, refer to clause 4.5.