2019/09 90 p.
The present document specifies the stage 2 of the service-based architecture used for location services in the 5G system, and corresponding Network Functions (NFs), NF services and procedures, to meet the service requirements defined in TS 22.261
and TS 22.071
Location Services specified in the present document include regulatory location services and commercial location services. The architecture and signalling procedures in NG-RAN are defined in TS 38.305
A general description of location services and service requirements are given in the specification TS 22.071
. Support of location services for GERAN, UTRAN and E-UTRAN access networks is described in TS 23.271
, TS 43.059
, TS 25.305
and TS 36.305
The positioning of a UE can be supported by RAT dependent position methods, which rely on for example 3GPP RAT measurements obtained by a target UE and/or on measurements obtained by an Access Network of 3GPP RAT signals transmitted by a target UE. Positioning of a UE can also be supported by RAT independent position methods which may rely on non-RAT measurements obtained by a UE and/or on other information.
The positioning of a UE can be performed by either 3GPP access network or non-3GPP access network. A proper access type shall be determined to assure that the positioning result can fulfil the requested QoS and operator policy.
Location information for one or multiple target UEs may be requested by and reported to an LCS client or an AF within or external to a PLMN, or a control plane NF within a PLMN. Location information contained in the location request and location information contained in the location response are defined in clause 5.5.
For location request from LCS client (neither in the UE nor in the NG-RAN) or AF external to a PLMN, privacy verification of the target UE shall be enabled to check whether it is allowed to acquire the UE location information based on UE LCS privacy profile and whether the LCS client or the AF is authorised to use the location service as
defined in clause 5.4. Additionally, UEs may optionally support privacy notification and verification on behalf of a user. Privacy override is also supported for regulatory LCS services according to local regulation.
The capabilities of a target UE to support LCS may be signalled by the UE to a serving PLMN at the AS, NAS and application (positioning protocol) levels to enable use of position methods supported by the UE.
To provide Location Service in the EPC interworking scenario, an EPC and 5GC common interface shall be used for the location request from LCS client or AF.
short Table of Contents for TS 23.273 Word version: 16.1.0
each title links to the equivalent title in the full ToC