9.1.3 FDD RSTD Measurement Accuracy

37.571-13GPPPart 1: Conformance test specificationTSUniversal Terrestrial Radio Access (UTRA) and Evolved UTRA (E-UTRA) and Evolved Packet Core (EPC)User Equipment (UE) conformance specification for UE positioning

9.1.3.1 Test purpose

To verify that the RSTD FDD intra-frequency measurement accuracy is within the specified limits.

9.1.3.2 Test applicability

This test applies to all types of E-UTRA FDD UE release 9 and forward that supports UE-assisted OTDOA except UE Category 1bis.

9.1.3.3 Minimum conformance requirements

The accuracy requirements in Table 9.1.3.3-1 are valid under the following conditions:

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

PRP 1,2|dBm according to clause E.2 for a corresponding Band.

There are no measurement gaps overlapping with the PRS subframes of the measured cell.

The parameter expectedRSTDUncertainty signalled over LPP as defined in 3GPP TS 36.355 [4] is less than 5 µs.

Table 9.1.3.3-1: RSTD measurement accuracy

Accuracy

Conditions

PRS Ês/Iot

Minimum PRS

bandwidth, which is minimum of serving cell channel bandwidth and the PRS bandwidths of the reference cell and the measured neighbour cell i Notes 3, 6

Minimum number of available measurement subframes among the reference cell and the measured neighbour cell i

Io Note 9 range

E-UTRA operating band groups Note 10

Minimum Io Note 1

Maximum Io

Ts Note 2

dB

RB

dBm/15kHz Note 8

dBm/BWChannel

15

(PRS Ês/Iot)ref ≥-6dB

and

(PRS Ês/Iot)i ≥-13dB

≥ 6

6

FDD_A, 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

-118

-50

FDD_H

-117.5

-50

FDD_N

-114.5

-50

10

Note 11

(PRS Ês/Iot)ref ≥-6dB

and

(PRS Ês/Iot)i ≥-13dB

 15

6

Note 5

Note 5

Note 5

6

(PRS Ês/Iot)ref ≥-6dB

and

(PRS Ês/Iot)i ≥-13dB

 25

≥ 2

Note 5

Note 5

Note 5

5

(PRS Ês/Iot)ref ≥-6dB

and

(PRS Ês/Iot)i ≥-13dB

 50

≥ 1

Note 5

Note 5

Note 5

4

Note 11

(PRS Ês/Iot)ref ≥-6dB

and

(PRS Ês/Iot)i ≥-13dB

 75

≥ 1

Note 5

Note 5

Note 5

NOTE 1: This minimum Io condition is expressed as the average Io per RE over all REs in an OFDM symbol.

NOTE 2: Ts is the basic timing unit defined in TS 36.211 [26].

NOTE 3: PRS bandwidth is as indicated in prs-Bandwidth in the OTDOA assistance data defined in TS 36.355 [4].

NOTE 4: Void.

NOTE 5: The same bands and the same Io conditions for each band apply for this requirement as for the corresponding requirement with the PRS bandwidth ≥ 6 RB.

NOTE 6: The serving cell, the reference cell, and the measured neighbour cell i are on the same carrier frequency.

NOTE 7: Void.

NOTE 8: 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 9: The Io is defined in PRS positioning subframes. The same Io range applies to PRS and non-PRS symbols. Io levels are different in PRS and non-PRS symbols within the same subframe.

NOTE 10: E-UTRA operating band groups are as defined in clause 4.4.2.

NOTE 11: Only applicable from Rel-12 onwards

The normative reference for this requirement is TS 36.133 [23] clause 9.1.10.1 and A.9.8.1.

9.1.3.4 Test description
9.1.3.4.1 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 MHz (Test 1 and 2) and 10 MHz (Test 3 and 4). 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 this part of the test shall be omitted.

1. Connect the SS and AWGN noise sources to the UE antenna connector or antenna connectors as shown in Annex A, Figure A.3a for 4RX capable UE without any 2RX bands. Otherwise use Annex A figure A.3.

2. The general test parameter settings are set up according to Table 9.1.3.4.1-1.

3. Propagation conditions are set according to clause 4.7.2.1.

4. Message contents are defined in clause 9.1.3.4.3.

5. All cells are on the same carrier frequency. Cell 1 is the serving cell and OTDOA assistance data reference cell; Cell 2 is the neighbour cell. The assistance data neighbour cell list includes in total 15 cells, where 14 of the cells are not simulated (dummy cells; as defined in 3GPP TS 37.571‑5 [20], clause 7.2.2).

6. The true RSTD (which is the receive time difference for frame 0 between cell 2 and cell 1 as seen at the UE antenna connector) is set to the following values:
Test 1: -92 Ts (about -3 s)
Test 2: 92 Ts (about 3 s)
Test 3: 92 Ts (about 3 s)
Test 4: -92 Ts (about -3 s)
Note that the related expectedRSTD values to be signalled over LPP are defined in Table 9.1.3.4-1 for each test.

Table 9.1.3.4.1-1: General Test Parameters for intra frequency RSTD Tests for E-UTRAN FDD

Parameter

Unit

Value

Comment

Test 1

Test 2

Test 3

Test 4

PCFICH/PDCCH/PHICH parameters

R.14 FDD

R.6 FDD

As specified in TS 36.521-3 [25] clause A.2.1.

OCNG Patterns defined in TS 36.521-3 [25] clause D.1

OP.7 FDD

OP.6 FDD

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 (other than those in the PRS subframes).

Reference cell

Cell 1

Neighbour cell

Cell 2

E-UTRA RF Channel Number

1

One FDD carrier frequency is used.

Channel Bandwidth (BWchannel)

MHz

1.4

10

PRS Transmission Bandwidth Note 2

RB

6

50

PRS configuration Index Note 2

12

2

As defined in 3GPP TS 36.211 [26]

Number of consecutive positioning downlink subframes Note 2

6

1

As defined in 3GPP TS 36.211 [26]

prs-MutingInfo Note 2

Cell 1: ‘11110000’

Cell 2: ‘11110000’

See section 6.5.1.2 in 3GPP TS 36.355 [4] for more information

Cell ID Note 2

(Cell ID of cell 1 – Cell ID of cell 2) mod 6 = 0

(Cell ID of cell 1 – Cell ID of cell 2) mod 6 = 1

(Cell ID of cell 1 – Cell ID of cell 2) mod 6 = 0

(Cell ID of cell 1 – Cell ID of cell 2) mod 6 = 3

Expected RSTD Note 1

us

Cell 2: 1

Other neighbour cells: randomly between -3 and 3

Cell 2: -1

Other neighbour cells: randomly between -3 and 3

Cell 2: -1

Other neighbour cells: randomly between -3 and 3

Cell 2: 1

Other neighbour cells: randomly between -3 and 3

Expected RSTD uncertainty for all neighbour cells Note 1

us

5

5

5

5

CP length Note 2

Normal

DRX

OFF

Radio frame receive time offset between the cells at the UE antenna connector Note 3

us

Cell 2 to Cell 1: -3

Cell 2 to Cell 1: 3

Cell 2 to Cell 1: 3

Cell 2 to Cell 1: -3

PRS are transmitted from synchronous cells

Number of cells provided in OTDOA assistance data

16

The number of cells includes the reference cell

Note 4

ms

2560

Derived according to the RSTD measurement requirements specified in Section 9.1.1.3

NOTE 1: Parameters “Expected RSTD” and “Expected RSTD uncertainty for all neighbour cells” are not settable parameters. These are parameters signalled in LPP only. For the values to be used in LPP see Table 9.1.3.4.3-4 and TS 37.571-5 [20], clause 7.2.2.

NOTE 2: Parameters “PRS Transmission Bandwidth”, “PRS configuration index”, “Number of consecutive positioning downlink subframes”, “prs-MutingInfo”, “Cell ID” and “CP length” are settable parameters and also parameters signalled in LPP. The values to be used for “Cell ID” are as follows: Cell 1: 0, Cell 2: Test 1: 6, Test 2: 7, Test 3: 6, Test 4: 9. For all the values to be used in LPP see Table 9.1.3.4.3-4 and TS 37.571-5 [20], clause 7.2.2.

NOTE 3: The parameter “Radio frame receive time offset between the cells at the UE antenna connector” is not a settable parameter but is used to set the “true RSTD” values in step 6 of clause 9.1.3.4.1.

NOTE 4: The parameter “” is not a settable parameter but is used to set the LPP “time” value in Table 9.1.3.4.3-2. The value of the LPP time IE is set to + T ms, where T = 150 ms, giving a value of 2710 ms. This is rounded up to the next allowed LPP value of 3 seconds.

9.1.3.4.2 Test procedure

The test consists of a set-up period and a measurement period. Cell 1 and Cell 2 are both active during the complete test. The beginning of the measurement period shall be aligned with the first PRS positioning subframe of a positioning occasion in the reference cell.

NOTE: The information on when PRS is muted is conveyed to the UE using PRS muting information in the OTDOA assistance data.

The OTDOA-RequestLocationInformation message and the OTDOA assistance data as defined in clause 9.1.3.4.3 shall be provided to the UE during the set-up period. The last TTI containing the OTDOA-RequestLocationInformation message shall be provided to the UE T ms before the start of the measurement period, where T = 150 ms is the maximum processing time of the OTDOA-RequestLocationInformation message and the OTDOA assistance data in the UE.

1. Ensure that the UE is in state Generic RB Established State 3A-RF according to 3GPP TS 36.508 [18] clause 7.2A.3.

2. The SS shall send a RESET UE POSITIONING STORED INFORMATION message.

3. Set the parameters according to Table 9.1.3.5-1 as appropriate. Propagation conditions are set according to clause 4.7.2.1.

3a. The SS shall send an LPP REQUEST CAPABILITIES message.

3b. The UE shall send an LPP PROVIDE CAPABILITIES message indicating the OTDOA capabilities supported by the UE in the OTDOA-ProvideCapabilities IE.

4. The SS shall send a LPP PROVIDE ASSISTANCE DATA message, including the OTDOA‑ProvideAssistanceData IE. If the UE message at step 3b includes the ackRequested IE set to TRUE, then the SS shall send an acknowledgment in the LPP PROVIDE ASSISTANCE DATA message.

5. The SS shall send a LPP REQUEST LOCATION INFORMATION message, including the OTDOA‑RequestLocationInformation IE such that the UE receives the message T ms before the start of the measurement period, where T = 150 ms.

6. The UE shall transmit a LPP PROVIDE LOCATION INFORMATION message, including the OTDOA‑ProvideLocationInformation IE.

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

8. The SS shall check the rstd value for Cell 2 in the OTDOA-SignalMeasurementInformation IE according to Table 9.1.3.5-2.

9. Repeat step 2-8 until the confidence level according to Annex D is achieved.

10. Repeat step 1-9 for each sub-test in Table 9.1.3.5-1 as appropriate.

9.1.3.4.3 Message contents

Table 9.1.3.4.3-1: RESET UE POSITIONING STORED INFORMATION

Derivation Path: 36.509 [11] clause 6.9

Information Element

Value/remark

Comment

Condition

UE Positioning Technology

0 0 0 0 0 0 0 1

OTDOA

Table 9.1.3.4.3-1a: LPP Request Capabilities

Information Element

Value/remark

otdoa‑RequestCapabilities

TRUE

Table 9.1.3.4.3-2: LPP RequestLocationInformation

Derivation Path: 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

3

See Note 4 of Table 9.1.3.4.1-1

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
SEQUENCE {

assistanceAvailability

FALSE

}

ecid-RequestLocationInformation

Not present

epdu-RequestLocationInformation

Not Present

}

}

}

}

}

}

}

Table 9.1.3.4.3-3: Void

Table 9.1.3.4.3-4: LPP ProvideAssistanceData

Derivation Path: 36.355 clause 6.2

Information Element

Value/remark

Comment

Condition

LPP-Message ::= SEQUENCE {

transactionID SEQUENCE {

Initiator

locationServer

transactionNumber

(0..255)

}

endTransaction

TRUE

sequenceNumber

Not present

acknowledgement

Not present

lpp-MessageBody CHOICE {

c1 CHOICE {

provideAssistanceData SEQUENCE {

criticalExtensions CHOICE {

c1 CHOICE {

provideAssistanceData-r9 SEQUENCE {

commonIEsProvideAssistanceData

Not present

a-gnss-ProvideAssistanceData

Not present

otdoa-ProvideAssistanceData SEQUENCE {

otdoa-ReferenceCellInfo

As defined in TS 37.571‑5 [20], clause 7.2.2.

otdoa-NeighbourCellInfo

As defined in TS 37.571‑5 [20], clause7.2.2.

otdoa-Error

Not present

}

epdu-ProvideAssistanceData

Not present

}

}

}

}

}

}

Table 9.1.3.4.3-5: LPP ProvideLocation Information

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
SEQUENCE {

otdoaSignalMeasurementInformation
SEQUENCE {

systemFrameNumber

physCellIdRef

Cell 1

cellGlobalIdRef

earfcnRef

referenceQuality

neighbourMeasurementList

SEQUENCE (SIZE(1)) {

physCellIdNeighbor

Cell 2

cellGlobalIdNeighbour

earfcnNeighbour

rstd

Set according to Table 9.1.3.5-2 for each specific test

rstd-Quality

}

}

otdoa-Error

May be present with error reason ‘undefined’ or ‘attemptedButUnableToMeasureSomeNeighbourCells’

}

ecid-ProvideLocationInformation

Not present

epdu-ProvideLocationInformation

Not present

}

}

}

}

}

}

Table 9.1.3.4.3-6: CQI-ReportConfig-DEFAULT: FDD RSTD Measurement Accuracy

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 Test 1 and Test 2

nomPDSCH-RS-EPRE-Offset

0

cqi-ReportPeriodic CHOICE {

release

NULL

}

9.1.3.5 Test requirement

Table 9.1.3.5-1 defines the primary level settings including test tolerances for all tests.

The RSTD FDD intra-frequency accuracy test shall meet the reported values in Table 9.1.3.5-2.

Table 9.1.3.5-1: Cell Specific Test Parameters for intra frequency RSTD Tests for E-UTRAN FDD

Parameter

Unit

Test 1

Test 2

Test 3

Test 4

Cell 1

Cell 2

Cell 1

Cell 2

Cell 1

Cell 2

Cell 1

Cell 2

E-UTRA RF Channel Number

1

PBCH_RA

dB

0

0

0

0

0

0

0

0

PBCH_RB

PSS_RA

SSS_RA

PCFICH_RB

PHICH_RA

PHICH_RB

PDCCH_RA

PDCCH_RB

OCNG_RANote 1

OCNG_RBNote 1

PRS_RA

dB

0

0

-2.7

0.3

0

0

-2.7

0.3

Note 2

dBm/15 kHz

-98

-98

-98

-98

-98

-98

-98

-98

PRS

dB

-2.37

-8.02

-5.7

-12.7

-2.37

-8.02

-5.7

-12.7

PRS Note 3

dB

-3

-10

-5.7

-12.7

-3

-10

-5.7

-12.7

Io Note 3

dBm/1.08 MHz

-78.92

-78.92

-79.2

-79.2

N/A

N/A

N/A

N/A

dBm/9 MHz

N/A

N/A

N/A

N/A

-69.72

-69.72

-69.99

-69.99

PRP Note 3

dBm/15kHz

-100.37

-106.02

-103.7

-110.7

-100.37

-106.02

-103.7

-110.7

Note 3

dB

-2.37

-8.02

-3

-13

-2.37

-8.02

-3

-13

RSRP Note 3

dBm/15kHz

-100.37

-106.02

-101

-111

-100.37

-106.02

-101

-111

Propagation condition

AWGN

Note 1: 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 (other than those in the PRS subframes).

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: , PRS , Io, RSRP and PRP levels have been derived from other parameters for information purposes. They are not settable parameters themselves. Io values are derived in the case that there is no PBCH, PSS or SSS in the OFDM symbols carrying PRS.

Table 9.1.3.5-2: RSTD FDD intra-frequency accuracy requirements for the reported values

Test 1

Test 2

Test 3

Test 4

Lowest reported value

RSTD_6248

RSTD_6431

RSTD_6441

RSTD_6258

Highest reported value

RSTD_6280

RSTD_6463

RSTD_6453

RSTD_6270

For the overall test to pass, the ratio of successful reported values in 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 Test 1 and Test 2 shall be omitted.