8.1.7 E-UTRAN FDD UE Rx-Tx time difference case for Category M1/M2 UE in CEModeA

37.571-13GPPPart 1: Conformance test specificationRelease 16TSUser Equipment (UE) conformance specification for UE positioning

8.1.7.1 Test purpose

The purpose of this test is to verify that the E-UTRAN FDD UE Rx – Tx time difference measurement accuracy for Category M1/M2 UEs is within the specified limits in TS 36.133 [23] clause 9.1.21.19 and 9.1.25.3.

8.1.7.2 Test applicability

This test applies to E-UTRA FDD UE Category M1/M2 release 14 and forward that supports ECID positioning.

8.1.7.3 Minimum conformance requirements

NOTE: This measurement is used for UE positioning purposes.

The UE RX-TX time difference is measured from the PCell.

The accuracy requirements in Table 8.1.7.3-1 are valid under the following conditions:

Conditions defined in TS 36.101 [2] clause 7.3 for reference sensitivity are fulfilled.

No changes to the uplink transmission timing are applied during the measurement period.

RSRP|_dBm according to clause E.1-1 for a corresponding Band.

Table 8.1.7.3-1: UE Rx – Tx time difference measurement accuracy for CEModeA

Accuracy	Conditions
	Ês/Iot	Downlink transmission bandwidth of PCell	Io Note 1 range
			E-UTRA operating band groups Note 6	Minimum Io	Maximum Io
Ts Note 2	dB	MHz		dBm/15kHz Note 5	dBm/BWChannel
±20	≥-3 dB	≥ 6	FDD-M1_A, TDD-M1_A	-121	-50
			FDD-M1_B	-120.5	-50
			FDD-M1_C, TDD-M1_C	-120	-50
			FDD-M1_D	-119.5	-50
			FDD-M1_E, TDD-M1_E	-119	-50
			FDD-M1_F	-118.5	-50
			FDD-M1_G	-118	-50
			FDD-M1_H	-117.5	-50
			FDD-M1_N	-114.5	-50
±10 Note 8	≥-3 dB	≥ 24	Note 3	Note 3	Note 3
NOTE 1: When in dBm/15kHz, the minimum Io condition is expressed as the average Io per RE over all REs in that symbol. Io may be different in different symbols within a subframe. NOTE 2: Ts is the basic timing unit defined in TS 36.211 [26]. NOTE 3: The same bands and the same Io conditions for each band apply for this requirement as for the corresponding requirement with downlink bandwidth ≤ 3 MHz. NOTE 4: Except Band 29. NOTE 5: The condition level is increased by ∆>0, when applicable, as described in TS 36.521-3 [25] Sections I.4.2 and I.4.3. NOTE 6: E-UTRA operating band groups are as defined in Section 4.4.2. NOTE 7: Except Band 32. NOTE 8: Only for Category M2.

The normative reference for this requirement is TS 36.133 [23] clause 9.1.21.19, 9.1.25.3 and A.9.7.7.

8.1.7.4 Test description

There is only one active cell in the tests. The tested UE is connected with the serving cell, configured to transmit SRS signals periodically, and signalled to report UE Rx – Tx time difference measurement. The test equipment measures the transmit timing of the UE using the transmitted SRS. The test equipment then compares this timing to the UE Rx-Tx measurement reported by the UE.

8.1.7.4.1 Initial conditions

Test Environment: Normal as defined in TS 36.508 [18] clause 4.1.

Frequencies to be tested: Mid Range, as defined in TS 36.508 [18] clause 4.3.1.1.

Channel Bandwidth to be tested: 10 MHz as defined in TS 36.508 [18] clause 4.3.1.

1. Connect the SS (node B emulator) and AWGN noise source to the UE antenna connectors as shown in Annex A figure A.5.

2. Propagation conditions are set according to clause 4.6.2.1.

3. Message contents are defined in clause 8.1.7.4.3.

4. Cell 1 is the serving cell. Cell 1 is the cell used for connection setup with the power levels set according to TS 36.521-3 [25] clauses C.0 and C.1 for this test.

8.1.7.4.2 Test procedure

1. Bring the UE to Generic RB Established State 3A-RF-CE according to 3GPP TS 36.508 [18] clause 7.2A.3AA, using a value of initial timing advance command T_A = 2 in the Random Access Response which indicates an initial timing advance value N_TA = 32 T_s. Note that in the remainder of the test the timing advance command T_A = 31 which indicates a timing advance adjustment value N_TA = 0 T_s.

2. Set the parameters according to Table 8.1.7.5-1 and 8.1.7.5-2 as appropriate. Propagation conditions are set according to clause 4.6.2.1.

3. The SS adjusts the downlink timing for Cell 1 to a delay of +8 T_S, compared to the current value.

4. Wait for 1.6 s to allow for the possibility that the UE makes autonomous timing adjustments.

4a. The SS shall transmit an LPP REQUEST CAPABILITIES message.

4b. The UE shall transmit an LPP PROVIDE CAPABILITIES message indicating the ECID capabilities supported by the UE in the ECID-ProvideCapabilities IE.

5. The SS shall transmit an LPP REQUEST LOCATION INFORMATION message, including the ECID‑RequestLocationInformation IE. If the UE message at step 4b includes the ackRequested IE set to TRUE, then the SS shall send an acknowledgment in the LPP REQUEST LOCATION INFORMATION message.

6. The UE shall transmit an LPP PROVIDE LOCATION INFORMATION message including the ecid-SignalMeasurementInformation IE.

7. As soon as possible after step 6 the SS shall measure the transmit timing of the UE using the transmitted SRS, relative to the current downlink timing.

8. If the UE message at step 6 includes the ackRequested IE set to TRUE, then the SS shall send a LPP acknowledgment message.

9. The SS shall check the reported value of ue-RxTxTimeDiff in the ecid-SignalMeasurementInformation IE provided by the UE in step 6 and compare it with the value measured in step 7. The SS shall check that the reported value is within the limits specified in table 8.1.7.5-3 compared to the measured value. If the reported value is within the limits the number of successful results is increased by one. If the reported value is not within the limits, or the UE reports an error in the LPP PROVIDE LOCATION INFORMATION message in step 6, or does not respond at step 6 within the time given by the time IE in the ECID-RequestLocationInformation IE in step 5, then the number of unsuccessful results is increased by one.

10. Repeat steps 3-9 until the confidence level according to Annex D.4.3 is achieved.
NOTE: To avoid a large divergence between the sent TA and the set downlink timing, the SS may reset the downlink timing for Cell 1 to its initial value after a certain amount of loops. The loop during the reset does not count for the result statistics.

8.1.7.4.3 Message contents

Message contents are according to TS 36.508 [18] clause 4.6 with the following exceptions:

Table 8.1.7.4.3-1: SoundingRS-RL-ConfigCommon-DEFAULT: UE Rx – Tx time difference for E-UTRAN FDD test requirement

Derivation Path: TS 36.508 [18] clause 4.6.3, Table 4.6.3-21 SoundingRS-UL-ConfigCommon-DEFAULT
Information Element		Value/remark	Comment	Condition
SoundingRS-UL-ConfigCommon-DEFAULT ::= SEQUENCE {
setup SEQUENCE {
srs-BandwidthConfig		bw5
srs-SubframeConfig		sc1		FDD
ackNackSRS-SimultaneousTransmission		FALSE
srsMaxUpPts		Not present		FDD
}

Table 8.1.7.4.3-2: SoundingRS-RL-ConfigDedicated-DEFAULT: UE Rx – Tx time difference for E-UTRAN FDD test requirement

Derivation Path: TS 36.508 [18] clause 4.6.3, Table 4.6.3-22 SoundingRS-UL-ConfigDedicated-DEFAULT
Information Element		Value/remark	Comment	Condition
SoundingRS-UL-ConfigDedicated-DEFAULT ::= CHOICE {
setup SEQUENCE {
srs-Bandwidth		bw0	bw0 used with no frequency hopping. bw3 used with frequency hopping
srs-HoppingBandwidth		hbw0
freqDomainPosition		0
duration		TRUE	Indefinite duration
srs-ConfigIndex		0
transmissionComb		0
cyclicShift		cs0	No cyclic shift
}
}

Table 8.1.7.4.3-2a: LPP REQUEST CAPABILITIES: UE Rx – Tx time difference for E-UTRAN FDD test requirement

Information Element	Value/remark
ecid‑RequestCapabilities	TRUE

Table 8.1.7.4.3-3: ECID-RequestLocationInformation: UE Rx – Tx time difference for E-UTRAN FDD test requirement

Derivation Path: TS 36.355 clause 6.2
Information Element	Value/remark	Comment	Condition
LPP-Message ::= SEQUENCE {
transactionID SEQUENCE {
Initiator	locationServer
transactionNumber	1
}
endTransaction	FALSE
sequenceNumber	Not present
acknowledgement	Not present
lpp-MessageBody CHOICE {
c1 CHOICE {
requestLocationInformation SEQUENCE {
criticalExtensions CHOICE {
c1 CHOICE {
requestLocationInformation-r9 SEQUENCE {
commonIEsRequestLocationInformation SEQUENCE {
locationInformationType	locationMeasurementsRequired
triggeredReporting	Not present
periodicalReporting	Not present
additionalInformation	onlyReturnInformationRequested
qos SEQUENCE {
horizontalAccuracy	Not present
verticalCoordinateRequest	FALSE
verticalAccuracy	Not present
responseTime SEQUENCE {
time	2
responseTimeEarlyFix-r12	Not present		Rel-12 onwards
}
velocityRequest	FALSE
}
environment	Not present
locationCoordinateTypes	Not present
velocityTypes	Not present
}
a-gnss-RequestLocationInformation	Not present
otdoa-RequestLocationInformation	Not present
ecid-RequestLocationInformation ::= SEQUENCE {
requestedMeasurements	0 0 1	ueRxTxReq
}
epdu-RequestLocationInformation	Not Present
}
}
}
}
}
}
}

8.1.7.5 Test requirement

Table 8.1.7.5-1 defines the primary level settings including test tolerances.

Table 8.1.7.5-1: FDD UE Rx – Tx time difference test parameters

Parameter	Unit	Test 1
E-UTRAN RF Channel Number		1
Channel Bandwidth (BWchannel)	MHz	10
DRX		OFF
PRACH Configuration		PRACH_4CE As specified in TS 36.133 [23] A.3.16
MPDCCH Reference measurement channelNote1		R.16 FDD
OCNG PatternNote2		OP.21 FDD
PBCH_RA	dB	0
PBCH_RB	dB
PSS_RA	dB
SSS_RA	dB
PHICH_RA	dB
PHICH_RB	dB
MPDCCH_RA	dB
MPDCCH_RB	dB
OCNG_RANote3	dB
OCNG_RBNote3	dB
	dBm/15 kHz	-98
	dB	-2.7
	dB	-2.7
IoNote4	dBm/9 MHz	-65.5
Propagation Condition		AWGN
Note 1: For the reference measurement channels, see TS 36.521-3 [25] A.7.1 Note 2: For the OCNG pattern, see clause A.3.2. Note 3: OCNG shall be used such that both cells are fully allocated and a constant total transmitted power spectral density is achieved for all OFDM symbols. Note 4: Io level has been derived from other parameters for information purpose. It is not a settable parameter.

Table 8.1.7.5-2: Sounding Reference Symbol Configuration to be used in FDD UE Rx – Tx time difference test

Field	Test 1	Comment
srsBandwidthConfiguration	bw5
srsSubframeConfiguration	sc1
ackNackSrsSimultaneousTransmission	FALSE
srsMaxUpPTS	N/A	Not applicable for FDD
srsBandwidth	0	No hopping
srsHoppingBandwidth	hbw0
frequencyDomainPosition	0
Duration	TRUE	Indefinite duration
Srs-ConfigurationIndex	0	SRS periodicity of 2ms for all Tests.
transmissionComb	0
cyclicShift	cs0	No cyclic shift
SRS-AntennaPort	an1	Number of antenna ports used for SRS transmission
Note: For further information see clause 6.3.2 in TS 36.331 [22].

The UE Rx – Tx time difference measurement accuracy shall fulfil the requirements in Table 8.1.7.5-3.

Table 8.1.7.5-3: Test requirements UE Rx – Tx time difference measurement accuracy requirements

Lowest reported value	Category M1: (Measured value from step 7 – 23) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-1 Category M2: (Measured value from step 7 – 13) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-1
Highest reported value	Category M1: (Measured value from step 7 + 23) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-1 Category M2: (Measured value from step 7 + 13) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-1

The test tolerances are defined in Annex C.

The rate of successful tests during repeated tests shall be at least 90% with a confidence level of 95%.