9.1.4 TDD RSTD Measurement Accuracy
37.571-13GPPPart 1: Conformance test specificationRelease 16TSUser Equipment (UE) conformance specification for UE positioning
9.1.4.1 Test purpose
To verify that the RSTD TDD intra-frequency measurement accuracy is within the specified limits.
9.1.4.2 Test applicability
This test applies to all types of E-UTRA TDD UE release 9 and forward that supports UE-assisted OTDOA except UE Category 1bis.
9.1.4.3 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.
The normative reference for this requirement is TS 36.133 [23] clause 9.1.10.1 and A.9.8.2.
9.1.4.4 Test description
9.1.4.4.1 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 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 9.1.4.4.1-1.
3. Propagation conditions are set according to clause 4.7.2.1.
4. Message contents are defined in clause 9.1.4.4.3.
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 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 9.1.4.4-1 for each test.
Table 9.1.4.4.1-1: General Test Parameters for intra frequency RSTD Tests for E-UTRAN TDD
Parameter |
Unit |
Value |
Comment |
|||
Test 1 |
Test 2 |
Test 3 |
Test 4 |
|||
PCFICH/PDCCH/PHICH parameters |
R.14 TDD |
R.6 TDD |
As specified in TS 36.521-3 [25] clause A.2.2. |
|||
OCNG Patterns defined in TS 36.521-3 [25] clause D.2 |
OP.4 TDD |
OP.2 TDD |
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 TDD carrier frequency is used. |
||||
Channel Bandwidth (BWchannel) |
MHz |
1.4 |
10 |
|||
Special subframe configuration |
6 |
6 |
As specified in table 4.2-1 in TS 36.211 [26]. The same configuration in both cells. |
|||
Uplink-downlink configuration |
3 |
1 |
As specified in table 4.2-2 in TS 36.211 [26] and table 9.1.2.3-2. The same configuration in both cells. |
|||
PRS Transmission Bandwidth Note 2 |
RB |
6 |
50 |
|||
PRS configuration Index Note 2 |
9 |
14 |
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 9.1.2.3 |
|||
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 9.1.4.4.3-4 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 9.1.4.4.3-4 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 9.1.4.4.1. NOTE 4: The parameter “” is not a settable parameter but is used to set the LPP “time” value in Table 9.1.4.4.3-2. 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. |
9.1.4.4.2 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 9.1.4.4.3 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 ΔT ms before the start of the measurement period, where ΔT = 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 9.1.4.5-1 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 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 9.1.4.5-2.
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 9.1.4.5-1 as appropriate.
9.1.4.4.3 Message contents
Table 9.1.4.4.3-1: 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 9.1.4.4.3-1a: LPP Request Capabilities
Information Element |
Value/remark |
otdoa‑RequestCapabilities |
TRUE |
Table 9.1.4.4.3-2: 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 9.1.4.4.1-1 |
|
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 |
|||
assistanceAvailability |
FALSE |
||
} |
|||
ecid-RequestLocationInformation |
Not present |
||
epdu-RequestLocationInformation |
Not Present |
||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
Table 9.1.4.4.3-3: Void
Table 9.1.4.4.3-4: 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], clause7.2.2. |
||
otdoa-NeighbourCellInfo |
As defined in TS 37.571‑5 [20], clause7.2.2. |
||
otdoa-Error |
Not present |
||
} |
|||
epdu-ProvideAssistanceData |
Not present |
||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
Table 9.1.4.4.3-5: 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 |
||||
otdoaSignalMeasurementInformation |
||||
systemFrameNumber |
||||
physCellIdRef |
Cell 1 |
|||
cellGlobalIdRef |
||||
earfcnRef |
||||
referenceQuality |
||||
neighbourMeasurementList SEQUENCE (SIZE(1)) { |
||||
physCellIdNeighbor |
Cell 2 |
|||
cellGlobalIdNeighbour |
||||
earfcnNeighbour |
||||
rstd |
Set according to Table 9.1.4.5-2 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 9.1.4.4.3-6: CQI-ReportConfig-DEFAULT: TDD 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 |
||
} |
9.1.4.5 Test requirement
Table 9.1.4.5-1 defines the primary level settings including test tolerances for all tests.
Each RSTD TDD intra-frequency accuracy test shall meet the reported values in Table 9.1.4.5-2.
Table 9.1.4.5-1: Cell Specific Test Parameters for intra frequency RSTD Tests for E-UTRAN TDD
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 9.1.4.5-2: RSTD TDD 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.