5.5 UE Positioning test mode procedures

36.5093GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC)Release 17Special conformance testing functions for User Equipment (UE)TS

5.5.1 Reset UE Positioning Stored Information

Figure 5.5.1-1: Reset UE Positioning Stored Information procedure

5.5.1.1 General

The SS uses the reset UE positioning stored information procedure to command the UE to reset the already acquired UE positioning information in preparation for subsequent test procedures.

5.5.1.2 Initiation

The SS requests the UE to reset the stored UE positioning information by transmitting a RESET UE POSITIONING STORED INFORMATION message.

5.5.1.3 Reception of RESET UE POSITIONING STORED INFORMATION message by UE

When UE receives RESET UE POSITIONING STORED INFORMATION message then the UE shall:

1> if the IE "UE Positioning Technology" has the value ‘AGNSS’:

2> discard any stored GNSS reference time, reference position, and any other aiding data obtained or derived during the previous test instance (e.g. expected ranges and Doppler);

2> temporarily disable any sensor data (if applicable) that can aid the positioning for the duration of the subsequent positioning procedure.

1> if the IE "UE Positioning Technology" has the value ‘OTDOA’:

2> discard any stored OTDOA reference and neighbour cell info assistance data;

2> use the reference cell in the provided OTDOA assistance data as reference cell for reporting RSTD measurements in the subsequent positioning procedure.

1> if the IE "UE Positioning Technology" has the value ‘MBS’:

2> discard any stored MBS assistance data and information obtained or derived during the previous test instance (e.g. Beacon PN code and slot information and code phase measurements);

2> temporarily disable any sensor data (if applicable) that can aid the positioning for the duration of the subsequent positioning procedure.

1> if the IE "UE Positioning Technology" has the value ‘WLAN’:

2> discard any stored WLAN assistance data and information obtained or derived during the previous test instance;

1> if the IE "UE Positioning Technology" has the value ‘Bluetooth’:

2> discard any stored Bluetooth data obtained or derived during the previous test instance;

1> if the IE "UE Positioning Technology" has the value ‘Sensor’:

2> discard any stored Sensor assistance data and information obtained or derived during the previous test instance;

1> otherwise:

2> ignore the message.

5.5.2 Update UE Location Information

Figure 5.5.2-1: Update UE Location Information procedure

5.5.2.1 General

The SS uses the Update UE Location information procedure to send positioning information to the UE and command it to store positioning information in preparation for subsequent test procedures.

5.5.2.2 Initiation

The SS requests the UE to store the positioning information contained in the message by transmitting a UPDATE UE LOCATION INFORMATION message.

5.5.2.3 Reception of UPDATE UE LOCATION INFORMATION message by UE

When UE receives UPDATE UE LOCATION INFORMATION message then the UE shall:

1> if the UE has location information values stored:

2> discard the stored location information:

1> store the received location information (ellipsoidPointWithAltitude, horizontalVelocity and gnss-TOD-msec) and maintain it until reception of RESET UE POSITIONING STORED INFORMATION or UPDATE UE LOCATION INFORMATION message. Information not supported by the UE may be discarded.

5.5.3 UTC time reset

Figure 5.5.3-1: UTC time reset procedure

5.5.3.1 General

The SS uses the UTC time reset procedure to command the UE to reset or clear the current UTC time (and optionally any other relevant information such as position) that has been calculated from GNSS in the UE in preparation for the subsequent test procedure. This allows the UE to rapidly reacquire GNSS and calculate a new value of UTC time which may not be consistent with the previous value. The UE may optionally retain any other information that may aid the rapid reacquisition of GNSS and the calculation of a new value of UTC time. The UE shall also use only GNSS for position calculation in the subsequent test procedure.

5.5.3.2 Initiation

The SS requests the UE to reset the stored UTC time by transmitting an AT Command + CUTCR.

5.5.3.3 Reception of AT Command +CUTCR by UE

When UE receives AT Command +CUTCR then the UE shall:

1> discard any stored UTC time previously derived from GNSS;

1> optionally discard any other relevant information that will prevent rapidly reacquisition of GNSS and calculation of a new value of UTC time which may not be consistent with the previously stored value;

1> optionally retain any other information that may aid the rapid reacquisition of GNSS and the calculation of a new value of UTC time;

1> temporarily disable any other non-GNSS positioning sensor data (if applicable) such that it shall use only GNSS for position calculation in the subsequent test procedure.