6 LTE indoor positioning system architecture and test models

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

6.1 Test system architecture

6.1.1 General system architecture

Refer to 3GPP TS 36.523-3 [6], clause 4.1.1.

6.1.2 Component architecture

The same architecture as in 5.1.2 applies, excluding the UTRA PTC.

Figure 6.1.2-1: Component architecture for an E-UTRA scenario Interfaces

Refer to

6.2 Test model

6.2.1 LTE indoor positioning test model

Figure 6.2.1-1: E-UTRA Test model for LTE indoor positioning testing

The LTE Indoor Positioning test model consists of an SS E-UTRAN protocol stack and an Indoor Positioning simulator. Depending on the Indoor Positioning Technology to be tested, the Indoor Positioning simulator will generate:

– MBS beacon signals, for MBS test cases;

– WLAN signals, for WLAN test cases;

– Bluetooth signals, for Bluetooth test cases.

– The Indoor Positioning simulator will be switched off for Sensor test cases.

The SS E-UTRA emulation part is the same as the model defined in 3GPP TS 36.523-3 [6].

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 ASPs at POS Port are used to:

– Load a pre-defined test scenario into the Indoor Positioning simulator.

– Start or stop generating and broadcasting signals from the Indoor Positioning simulator.

– Retrieve the appropriate (MBS, WLAN, Sensor) assistance data from the assistance data source.

Under the ASP commands, the upper tester loads or re-loads pre-defined test scenario to the Indoor Positioning simulator. The generated signals shall simulate the corresponding Indoor Positioning environment as specified in 3GPP TS 37.571-2 [3], clause 5.

The SS also sends the appropriate assistance data to the UE through LPP signalling (see 3GPP TS 37.355 [10]) to facilitate the UE acquisition of MBS Beacons or WLAN APs. For UE-based tests, the SS also sends the appropriate assistance data to enable the UE to calculate its position for MBS or WLAN tests, or calculate altitude based on barometric pressure sensor measurements.

The UE positioning services are encoded in a TCAP [16] ROSE component [15] of the facility information element [14] in the Supplement Service [13] conveyed in the NAS messages. The facility information element is encoded in BER in TTCN referred to 3GPP TS 24.080 [13], clause 3.6.1 and 3GPP TS 29.002 [14], clause 17.1.1.