6B.2 Test models

37.571-43GPPPart 4: Test suitesRelease 16TSUser Equipment (UE) conformance specification for UE positioning

6B.2.1 NR GNSS positioning test model

The NR positioning test model consists of an SS NR protocol stack and a positioning simulator. The SS NR/5GC emulation part is the same as the model defined in 3GPP TS 38.523-3 [24]. The positioning simulator is the same as for LTE positioning test model defined in clause 5.2.1.

Figure 6B.2.1-1: Test model for NR GNSS positioning testing

6B.2.2 NR indoor positioning test model

The NR indoor positioning test model is the same as the NR positioning test model in clause 6B.2.1 but replacing the Positioning simulator with an Indoor Positioning simulator. The same principles as in clause 6.2.1 apply but replacing LTE with NR.

6B.2.3 NR OTDOA (LTE) positioning test model

OTDOA measurements are not supported on NR cells in Rel-15. The OTDOA measurements are provided by LTE cells instead. The UE will be attached to an NR cell and the LPP session will be established over NR/5GC NAS. The UE will report OTDOA RSTD measurements from LTE neighbour cells.

The NR OTDOA (LTE) positioning model consists of an SS NR/5GC protocol stack and a SS E-UTRAN protocol stack. The SS NR/5GC emulation part is the same as the model defined in 3GPP TS 38.523-3 [34]. The SS E-UTRAN emulation part is the same as the model defined in clause 5.4 (i.e. including an additional port to configure the antenna port 6 and the Positioning Reference Signal (PRS) in the LTE cells). The E-UTRA PTC will not be connected to NASEMU or IMS/IP PTCs.

Figure 6B.2.3-1: Test model for NR OTDOA (LTE) positioning testing

6B.2.4 NR Multi-RTT, DL-AoD and DL-TDOA positioning test model

Figure 6B.2.4-1: NR Multi-RTT, DL-AoD and DL-TDOA test model

The NR Multi-RTT, DL-AoD and DL-TDOA test model is the same as the NR/5GC Layer 3 test model (TS 38.523-3 [24], clause 5.2.1.1) with an additional port to configure the DL Positioning Reference Signal (DL-PRS) in the NR cells. The extension of NR ASPs is defined in annex X [TBD].

The simulated NR Multi-RTT, DL-AoD and DL-TDOA environments are specified in TS 37.571-2 [3], clauses 8.2.9, 8.2.10 and 8.2.11, respectively. The DL-PRS is transmitted according to TS 38.211 [29], clause 7.4.1.7.

The UE is configured in normal mode. On UE side Ciphering/Integrity (PDCP and NAS) is enabled. The tests are performed on C-Plane.

The DL-PRS is transmitted by the physical layer of the NR cell(s) in the SS. The assistance data to provide the UE with the configuration of the DL-PRS is sent from the SS to the UE via LPP signalling.

For Multi-RTT, the SS will be also configured through the NR_SYS port to receive UL-SRS from the UE.

6B.2.5 NR E-CID test model

The test model is the same as the NR/5GC Layer 3 test model (TS 38.523-3 [24], clause 5.2.1.1).