8.1.2 E-UTRAN TDD 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

8.1.2.1 Test purpose

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

8.1.2.2 Test applicability

This test applies to all types of E-UTRA TDD UE release 9 to release 11 with LPP release 13 onwards that supports ECID positioning. Note that for LPP releases before release 13 the UE TDD Rx – Tx time difference measurement report mapping is ambiguous and therefore this test shall not be used.

8.1.2.3 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.

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

8.1.2.4 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 Ts and 5008 Ts 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.

8.1.2.4.1 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 4.3.1.2.

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 8.1.2.4.3.

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.

8.1.2.4.2 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 TA = 2 in the Random Access Response which indicates an initial timing advance value NTA = 32 Ts. Note that in the remainder of the test the timing advance command TA = 31 which indicates a timing advance adjustment value NTA = 0 Ts.

2. Set the parameters according to Sub-test 1 in Tables 8.1.2.5-1 and 8.1.5.2-2 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 TS, 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. The IE ueRxTxSupTDD-r13 shall be present (TRUE).

5. The SS shall transmit a 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 values are within the limits specified in table 8.1.2.5-3 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 TA = 313 in the Random Access Response which indicates an initial timing advance value NTA = 5008 Ts in step 1.

12. Repeat steps 1-11 for Sub-test 2 (consisting of Test point 1and Test point 2) in Tables 8.1.2.5-1 and 8.1.2.5-2 as appropriate. In step 3 the SS adjusts the downlink timing for Cell 1 to a delay of +4 TS 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.

8.1.2.4.3 Message contents

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

Table 8.1.2.4.3-1: SoundingRS-RL-ConfigCommon-DEFAULT: UE Rx – Tx time difference for E-UTRAN TDD 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

TDD

ackNackSRS-SimultaneousTransmission

FALSE

srsMaxUpPts

TRUE

TDD

}

Table 8.1.2.4.3-2: SoundingRS-RL-ConfigDedicated-DEFAULT: UE Rx – Tx time difference for E-UTRAN TDD 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

10

transmissionComb

0

cyclicShift

cs0

No cyclic shift

}

}

Table 8.1.2.4.3-2a: LPP REQUEST CAPABILITIES: UE Rx – Tx time difference for E-UTRAN TDD test requirement

Information Element

Value/remark

ecid‑RequestCapabilities

TRUE

Table 8.1.2.4.3-2b: LPP PROVIDE CAPABILITIES: UE Rx – Tx time difference for E-UTRAN TDD test requirement

Information Element

Value/remark

ueRxTxSupTDD-r13

TRUE

Table 8.1.2.4.3-3: ECID-RequestLocationInformation: UE Rx – Tx time difference for E-UTRAN TDD 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 8.1.2.4.3-4: ECID-ProvideLocationInformation: UE Rx – Tx time difference for E-UTRAN TDD 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 8.1.2.4.3-5: CQI-ReportConfig-DEFAULT: UE Rx – Tx time difference for E-UTRAN TDD 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

}

8.1.2.5 Test requirement

Table 8.1.2.5-1 defines the primary level settings including test tolerances for all sub-tests.

Table 8.1.2.5-1: Cell specific test parameters for UE Rx-Tx time difference measurement

Parameter

Unit

Sub-test 1

Sub-test 2

E-UTRAN RF Channel Number

1

1

BWchannel

MHz

1.4

10

Uplink-downlink configuration of cell Note 1

1

1

Special subframe configuration of cell Note 1

6

6

PDSCH Reference measurement channel defined in TS 36.521-3 [25] clause A.1.2

R.2 TDD

R.0 TDD

PDSCH allocation

2-3

13-36

PDCCH/PCFICH/PHICH Reference measurement channel defined in TS 36.521-3 [25] clause A.2.2

R.8 TDD

R.6 TDD

OCNG Patterns defined in TS 36.521-3 [25] clause D.2

OP.3 TDD

OP.1 TDD

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 2

dB

OCNG_RBNote 2

dB

Note 3

dBm/15 kHz

-98

-98

RSRP Note 4

dBm/15 kHz

-100.7

-100.7

dB

-2.7

-2.7

Io Note 4

dBm/1.08 MHz

-77.55

N/A

dBm/9 MHz

N/A

-67.35

dB

-2.7

-2.7

Propagation Condition

AWGN

Note 1: For special subframe and uplink-downlink configurations see Tables 4.2-1 and 4.2-2 in 3GPP TS 36.211 [26].

Note 2: OCNG shall be used such that the cell is fully allocated and a constant total transmitted power spectral density is achieved for all OFDM symbols.

Note 3: 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 4: RSRP and Io levels have been derived from other parameters for information purposes. They are not settable parameters themselves.

Table 8.1.2.5-2: Sounding Reference Symbol Configuration to be used in TDD UE Rx – Tx time difference test

Field

Sub-test 1

Sub-test 2

Comment

Value

srsBandwidthConfiguration

bw7

bw5

srsSubframeConfiguration

sc1

ackNackSrsSimultaneousTransmission

FALSE

srsMaxUpPTS

TRUE

srsBandwidth

0

No hopping

srsHoppingBandwidth

hbw0

frequencyDomainPosition

0

Duration

TRUE

Indefinite duration

Srs-ConfigurationIndex

10

SRS periodicity of 10ms.

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 8.1.2.5-3.

Table 8.1.2.5-3: 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 4.6.3-2

(Measured value from step 7 – 13) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-2

Highest reported value

(Measured value from step 7 + 23) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-2

(Measured value from step 7 + 13) Ts converted to RX-TX_TIME_DIFFERENCE according to Table 4.6.3-2

NOTE: Each sub-test in table 8.1.2.5-3 has two test points starting at 32 Ts and 5008 Ts.

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.