6.1.1 Assisted GPS Network Induced Tests

37.571-23GPPPart 2: Protocol conformanceRelease 16TSUser Equipment (UE) conformance specification for UE positioning

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

6.1.1.1 LCS Network Induced location request/ UE-Based GPS/ Emergency Call / with USIM

6.1.1.1.1 Definition

This test case applies to all UEs supporting UE-Based GPS Location Service capabilities.

6.1.1.1.2 Conformance requirements

1) A MM connection for an emergency call may be established in all states of the mobility management sublayer which allow MM connection establishment for a normal originating call.

When a user requests an emergency call establishment the UE will send a CM SERVICE REQUEST message to the network with a CM service type information element indicating emergency call establishment.

2) Having entered the "MM connection pending" state, upon MM connection establishment, the call control entity of the UE sends a setup message to its peer entity. This setup message is

– a SETUP message, if the call to be established is a basic call; and

– an EMERGENCY SETUP message, if the call to be established is an emergency call.

3) If the IE "UE positioning GPS reference time" is included, the UE shall:

1> store the IE "GPS Week" in "UE positioning GPS reference time" in variable UE_POSITIONING_GPS_DATA and use it as the current GPS week;

1> store the IE "GPS TOW msec" in the IE "UE positioning GPS reference time" in variable UE_POSITIONING_GPS_DATA and use it as an estimate of the GPS Time-of-Week at the time of reception of the complete message containing the IE "GPS TOW msec";

NOTE: The UE does not need to apply any compensation on the GPS Time-of-Week.

4) If the IE "UE positioning GPS reference UE position" is included, the UE shall:

1> store this IE in the IE "UE positioning GPS reference UE position" in variable UE_POSITIONING_GPS_DATA; and

1> use it as a priori knowledge of the approximate location of the UE.

5) The UE shall when a measurement report is triggered:

2> if the UE has been able to calculate a position after performing measurements on the cells included in the variable UE_POSITIONING_OTDOA_DATA_UE_BASED in case of OTDOA or on the list of satellites included in the variable UE_POSITIONING_GPS_DATA in case of GPS positioning:

3> include IE "UE positioning Position Estimate Info" in the MEASUREMENT REPORT and set the contents of the IE as follows:

4> if the UE does not support the capability to perform the UE GPS timing of cell frames measurement; or

4> if the IE "GPS timing of Cell wanted" is set to FALSE:

5> include the IE "GPS TOW msec".

4> if IE "Vertical Accuracy" has been included in IE "UE positioning reporting quantity":

5> if the IE "Vertical Accuracy" has been assigned to a value unequal to "0":

6> if the UE has been able to calculate a 3-dimensional position:

7> include IE "Ellipsoid point with altitude and uncertainty ellipsoid" as the position estimate.

6> if the UE has not been able to calculate a 3-dimensional position:

7> act as if IE "Vertical Accuracy" has not been included in IE "UE positioning reporting quantity".

4> if IE "Vertical Accuracy" has not been included in IE "UE positioning reporting quantity":

5> if IE "Horizontal Accuracy" in IE "UE positioning reporting quantity" has been assigned to a value unequal to 0:

6> include either IE "Ellipsoid point with uncertainty circle" or IE "Ellipsoid point with uncertainty ellipse" or IE "Ellipsoid point with altitude and uncertainty ellipsoid" as the position estimate.

Reference(s):

– Conformance requirement 1: TS 24.008 clause 4.5.1.5.

– Conformance requirement 2: TS 24.008, clause 5.2.1.

– Conformance requirement 3: TS 25.331, clause 8.6.7.19.3.7.

– Conformance requirement 4: TS 25.331, clause 8.6.7.19.3.8.

– Conformance requirement 5: TS 25.331, clause 8.6.7.19.1b.

6.1.1.1.3 Test Purpose

To verify when an emergency call is initiated by a UE with a USIM, and the network performs a location request using the RRC measurement control procedure by sending Measurement Control message , then the UE respond with a Measurement Report containing UE location.

6.1.1.1.4 Method of Test

Initial Conditions

– System Simulator:

– 1 cell, default parameters.

– Satellite signals: As specified in 4.2.

– User Equipment:

– the UE is in state "MM idle" with valid TMSI and CKSN.

Related PICS/PIXIT Statements

– Emergency speech call yes/no

– UE Based Network Assisted GPS

Test procedure

The UE is made to initiate an emergency call.

After the call has been through-connected in both directions, the SS orders an A-GPS positioning measurement using two MEASUREMENT CONTROL messages. The last MEASUREMENT CONTROL message orders periodical reporting by sending a MEASUREMENT CONTROL message requesting periodical measurement reporting (1 report, interval 64s).

The UE then performs positioning measurements, calculates "UE Positioning Position Estimate Info" and responds with this in the RRC message MEASUREMENT REPORT.

Finally the SS clears the call.

Expected Sequence

Step	Direction		Message	Comments
Step	UE	SS	Message	Comments
1	UE			The "emergency number" is entered. Number shall be one programmed in test USIM EF_ECC (Emergency Call Codes), ref. 34.108 clause 8.3.2.21.
2	–>			UE establishes RRC procedure for emergency call. Establishment cause: Emergency Call SS checks that the UE capability includes A-GPS UE based positioning measurement
3	–>		CM SERVICE REQUEST	The CM service type IE indicates "emergency call establishment".
4	<–		AUTHENTICATION REQUEST	IE Authentication Parameter AUTN shall be present in the message.
5	–>		AUTHENTICATION RESPONSE	SRES specifies correct value.
6				SS starts security procedure.
7	–>		EMERGENCY SETUP	If the Bearer capability IE is not included the default UMTS AMR speech version shall be assumed.
8	<–		CALL PROCEEDING
9	<–		ALERTING
10	<–			SS sets up the radio bearer with the rate indicated by the EMERGENCY SETUP message.
11	<–		CONNECT
12	–>		CONNECT ACKNOWLEDGE
13	UE			The DTCH is through connected in both directions.
14	<-		MEASUREMENT CONTROL
15	<-		MEASUREMENT CONTROL
16	–>		MEASUREMENT REPORT
17	<–		DISCONNECT	SS disconnects the call and associated radio bearer.

Specific Message Contents

MEASUREMENT CONTROL (Step 14):

Information element	Value/remark
Measurement Information Elements
Measurement Identity	10
Measurement Command	Setup
Measurement Reporting Mode
– Measurement report transfer mode	Acknowledged mode RLC
– Periodical reporting / Event trigger reporting mode	Periodical reporting
Additional Measurements List	Not present
CHOICE Measurement type	UE positioning measurement
– UE positioning measurement
– UE positioning reporting quantity
– Method type	UE based
– Positioning methods	GPS
– Response time	128
– Horizontal accuracy	127
– Vertical accuracy	127
– GPS timing of cell wanted	FALSE
– Multiple sets	FALSE
– Additional assistance data request	FALSE
– Environmental characterization	Not present
– Measurement validity
– UE state	All states
– CHOICE Reporting criteria
– No reporting
– UE pos OTDOA assistance data for UE-assisted	Not present
– UE pos OTDOA assistance data for UE-based	Not present
– UE positioning GPS assistance data	Set as specified for the first MEASUREMENT CONTROL message for "Adequate assistance data for UE-based A-GPS" in 4.3.1
Physical Channel Information Elements
DPCH compressed mode status info	Not present

MEASUREMENT CONTROL (Step 15):

Information element	Value/remark
Measurement Information Elements
Measurement Identity	10
Measurement Command	Modify
Measurement Reporting Mode
– Measurement report transfer mode	Acknowledged mode RLC
– Periodical reporting / Event trigger reporting mode	Periodical reporting
Additional Measurements List	Not present
CHOICE Measurement type	UE positioning measurement
– UE positioning measurement
– UE positioning reporting quantity
– Method type	UE based
– Positioning methods	GPS
– Response time	128
– Horizontal accuracy	127
– Vertical accuracy	127
– GPS timing of cell wanted	FALSE
– Multiple sets	FALSE
– Additional assistance data request	FALSE
– Environmental characterization	Not present
– Measurement validity
– UE state	All states
– CHOICE Reporting criteria	Periodical reporting criteria
– Amount of reporting	1
– Reporting interval	64000
– UE pos OTDOA assistance data for UE-assisted	Not present
– UE pos OTDOA assistance data for UE-based	Not present
– UE positioning GPS assistance data	Set as specified for the second MEASUREMENT CONTROL message for "Adequate assistance data for UE-based A-GPS" in 4.3.1
Physical Channel Information Elements
DPCH compressed mode status info	Not present

MEASUREMENT REPORT (Step 16):

Information element	Value/remark
Measurement Information Elements
Measurement Identity	10
Measured Results
– CHOICE Measurement	UE positioning measured results
– UE positioning measured results
– UE positioning OTDOA measured results	Not present
– UE positioning position estimate info
– CHOICE Reference time	GPS reference time only
– GPS TOW msec	Not checked
– CHOICE Position estimate	One of ‘Ellipsoid point with uncertainty Circle’ or ‘Ellipsoid point with uncertainty Ellipse’ or ‘Ellipsoid point with altitude and uncertainty Ellipsoid’
– UE positioning GPS measured results	Not present
– UE positioning error	Not present
Measured Results on RACH	Not present
Additional Measured Results	Not present
Event Results	Not present

6.1.1.1.5 Test requirements

After step 12 the UE shall have through connected the DTCH in both directions.

After step 15 the UE shall respond with a MEASUREMENT REPORT message.

6.1.1.2 LCS Network Induced location request/ UE-Based GPS/ Emergency Call / without USIM

6.1.1.2.1 Definition

This test case applies to all UEs supporting UE-Based GPS Location Service capabilities.

6.1.1.2.2 Conformance requirements

1) A MM connection for an emergency call may be established in all states of the mobility management sublayer which allow MM connection establishment for a normal originating call.

When a user requests an emergency call establishment the UE will send a CM SERVICE REQUEST message to the network with a CM service type information element indicating emergency call establishment.

Normally, the UE will be identified by an IMSI or a TMSI. However, if none of these identifiers is available in the UE, then the UE shall use the IMEI for identification purposes.

2) As a serving network option, emergency calls may be established without the network having to apply the security mode procedure as defined in TS 24.008.

The following are the only cases where the "security procedure not applied" option may be used:

a) Authentication is impossible because the USIM is absent.

3) Having entered the "MM connection pending" state, upon MM connection establishment, the call control entity of the UE sends a setup message to its peer entity. This setup message is

– a SETUP message, if the call to be established is a basic call; and

– an EMERGENCY SETUP message, if the call to be established is an emergency call.

4) If the IE "UE positioning GPS reference time" is included, the UE shall:

1> store the IE "GPS Week" in "UE positioning GPS reference time" in variable UE_POSITIONING_GPS_DATA and use it as the current GPS week;

NOTE: The UE does not need to apply any compensation on the GPS Time-of-Week.

5) If the IE "UE positioning GPS reference UE position" is included, the UE shall:

1> store this IE in the IE "UE positioning GPS reference UE position" in variable UE_POSITIONING_GPS_DATA; and

1> use it as a priori knowledge of the approximate location of the UE.

6) The UE shall when a measurement report is triggered: