8.1.1 E-UTRAN FDD UE Rx – Tx time difference case (Rel-9 to Rel-11)

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

8.1.1.1 Test purpose

The purpose of this test is to verify that the E-UTRAN FDD UE Rx – Tx time difference measurement accuracy is within the specified limits in TS 36.133 [23] clause 9.1.9.

8.1.1.2 Test applicability

This test applies to all types of E-UTRA FDD UE release 9 to release 11 that supports ECID positioning.

8.1.1.3 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 8.1.1.3-1 are valid under the following conditions:

Cell specific reference signals are transmitted either from one, two or four antenna ports.

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 for a corresponding Band.

Table 8.1.1.3-1: UE Rx – Tx time difference measurement accuracy

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	≤ 3 MHz	FDD_A Note 7, TDD_A	-121	-50
			FDD_B	-120.5	-50
			FDD_C, TDD_C	-120	-50
			FDD_D	-119.5	-50
			FDD_E, TDD_E	-119	-50
			FDD_F	-118.5	-50
			FDD_G Note 4	-118	-50
			FDD_H	-117.5	-50
			FDD_N	-114.5	-50
±10	≥-3 dB	≥ 5 MHz	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.

The normative reference for this requirement is TS 36.133 [23] clause 9.1.9 and A.9.7.1.

8.1.1.4 Test description

The test consists of two sub-tests; the difference between the sub-tests is the bandwidth, 1.4 MHz and 10 MHz. Each sub-test has two test points with time delays starting at 32 T_s and 5008 T_s respectively. 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.

8.1.1.4.1 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: 1.4 and 10 MHz. In the case that 1.4 MHz channel bandwidth is not defined for the operating band under test, as defined in TS 36.101 [2] clause 5.6.1, then the corresponding sub-test shall be omitted.

1. Connect the SS (node B emulator) and AWGN noise source to the UE antenna connectors as shown in Annex A figure A.5a for 4RX capable UE without any 2RX bands. Otherwise use Annex A figure A.5.

2. Propagation conditions are set according to clause 4.6.2.1.

3. Message contents are defined in clause 8.1.1.4.3.

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.

8.1.1.4.2 Test procedure

1. Bring the UE to State 3A or 3A-RF according to TS 36.508 [18] clause 4.5.3A or 5.2A.2, 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 Sub-test 1 in Tables 8.1.1.5-1 and 8.1.1.5-2 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 8.1.1.5-3 for Sub-test 1 compared to the measured value. If the reported value is within the limits the number of successful results for “Sub-test 1 – Test point 1” 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 for “Sub-test 1 – Test point 1” 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.

11. Repeat steps 1-10 for “Sub-test 1 – Test point 2”. Set a value of initial timing advance command T_A = 313 in the Random Access Response which indicates an initial timing advance value N_TA = 5008 T_s in step 1.

12. Repeat steps 1-11 for Sub-test 2 (consisting of Test point 1 and Test point 2) in Tables 8.1.1.5-1 and 8.1.1.5-2 as appropriate. In step 3 the SS adjusts the downlink timing for Cell 1 to a delay of +4 T_S compared to the current value.

If both test points of a sub-test pass, the sub-test passes. If one test point of a sub-test fails, the sub-test fails.

If all (applicable) sub-tests pass, the whole test passes. If one (applicable) sub-test fails, the whole test fails.

8.1.1.4.3 Message contents

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

Table 8.1.1.4.3-1: 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		bw7 for sub-test 1 bw5 for sub-test 2	Set according to specific sub-test
srs-SubframeConfig		Sc1		FDD
ackNackSRS-SimultaneousTransmission		FALSE
srsMaxUpPts		Not present		FDD
}

Table 8.1.1.4.3-2: 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 8.1.1.4.3-2a: LPP REQUEST CAPABILITIES: UE Rx – Tx time difference for E-UTRAN FDD test requirement

Information Element	Value/remark
ecid‑RequestCapabilities	TRUE

Table 8.1.1.4.3-3: 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
}
}
}
}
}
}
}

Table 8.1.1.4.3-4: ECID-ProvideLocationInformation: UE Rx – Tx time difference for E-UTRAN FDD test requirement

Derivation Path: 36.355 clause 6.2
Information Element		Value/remark	Comment	Condition
LPP-Message ::= SEQUENCE {
transactionID SEQUENCE {
Initiator		locationServer
transactionNumber		1
}
endTransaction		TRUE
sequenceNumber		(0..255)
acknowledgement
lpp-MessageBody CHOICE {
c1 CHOICE {
provideLocationInformation SEQUENCE {
criticalExtensions CHOICE {
c1 CHOICE {
provideLocationInformation-r9 SEQUENCE {
commonIEsProvideLocationInformation		Not present.
a-gnss-ProvideLocationInformation		Not present
otdoa-ProvideLocationInformation		Not present
ecid-ProvideLocationInformation ::= SEQUENCE {
ecid-SignalMeasurementInformation ::= SEQUENCE {
primaryCellMeasuredResults		Not Present
MeasuredResultsList ::= SEQUENCE (SIZE(1..32)) OF MeasuredResultsElement
MeasuredResultsElement ::= SEQUENCE {
physCellId
cellGlobalId
arfcnEUTRA
systemFrameNumber
rsrp-Result		Not Present
rsrq-Result		Not Present
ue-RxTxTimeDiff			Set according to specific sub-test and test point.
}
}
}
epdu-ProvideLocationInformation		Not present
}
}
}
}
}
}

Table 8.1.1.4.3-5: CQI-ReportConfig-DEFAULT: UE Rx – Tx time difference for E-UTRAN FDD test requirement

Derivation Path: TS 36.508 [18] clause 4.6.3, Table 4.6.3-2 CQI-ReportConfig-DEFAULT
Information Element	Value/remark	Comment	Condition
CQI-ReportConfig-DEFAULT ::= SEQUENCE {
cqi-ReportModeAperiodic	rm30	This IE should be omitted for Sub-test 1
nomPDSCH-RS-EPRE-Offset	0
cqi-ReportPeriodic CHOICE {
release	NULL
}

8.1.1.5 Test requirement

Table 8.1.1.5-1 defines the primary level settings including test tolerances for all sub-tests.

Table 8.1.1.5-1: FDD UE Rx – Tx time difference test parameters

Parameter	Unit	Sub-test 1	Sub-test 2
E-UTRAN RF Channel Number		1	1
BWchannel	MHz	1.4	10
DRX		OFF
PDSCH Reference measurement channel defined in TS 36.521-3 [25] clause A.1.1		R.2 FDD	R.0 FDD
PDSCH allocation		2—3	13—36
PDCCH/PCFICH/PHICH Reference measurement channel defined in TS 36.521-3 [25] clause A.2.1		R.8 FDD	R.6 FDD
OCNG Patterns defined in TS 36.521-3 [25] clause D.1		OP.3 FDD	OP.1 FDD
PBCH_RA	dB	0	0
PBCH_RB	dB
PSS_RA	dB
SSS_RA	dB
PCFICH_RB	dB
PHICH_RA	dB
PHICH_RB	dB
PDCCH_RA	dB
PDCCH_RB	dB
PDSCH_RA	dB
PDSCH_RB	dB
OCNG_RANote 1	dB
OCNG_RBNote 1	dB
Note 2	dBm/15 kHz	-98	-98
RSRP Note 3	dBm/15 kHz	-101	-101
	dB	2.7	2.7
Io Note 3	dBm/1.08 MHz	-76.55	N/A
	dBm/9 MHz	N/A	-67.35
	dB	-2.7	-2.7
Propagation Condition		AWGN
Note 1: OCNG shall be used such that the resources in the active cell are fully allocated and a constant total transmitted power spectral density is achieved for all OFDM symbols. Note 2: Interference from other cells and noise sources not specified in the test is assumed to be constant over subcarriers and time and shall be modelled as AWGN of appropriate power for to be fulfilled. Note 3: RSRP and Io levels have been derived from other parameters for information purposes. They are not settable parameters themselves.

Table 8.1.1.5-2: Sounding Reference Symbol Configuration to be used in FDD UE Rx – Tx time difference test

Field	Sub-test 1	Sub-test 2	Comment
	Value
srsBandwidthConfiguration	bw7	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.
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 3GPP TS 36.331 [22].

The UE Rx – Tx time difference measurement accuracy shall fulfil the requirements in Table 8.1.1.5-3.

Table 8.1.1.5-3: Test requirements UE Rx – Tx time difference measurement accuracy requirements

	Sub-test 1	Sub-test 2
Lowest reported value	(Measured value from step 7 – 23) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-1	(Measured value from step 7 – 13) Ts convertedto RX-TX_TIME_DIFFERENCE according to Table 4.6.3-1
Highest reported value	(Measured value from step 7 + 23) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-1	(Measured value from step 7 + 13) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-1

NOTE: Each sub-test in table 8.1.1.5-3 has two test points starting at 32 T_s and 5008 T_s.

The test tolerances are defined in Annex C.

For the overall test to pass, the ratio of successful reported values in each test point of each sub-test shall be more than 90% with a confidence level of 95%. In the case that 1.4 MHz channel bandwidth is not defined for the operating band under test then Sub-test 1 shall be omitted.