9.6 HD-FDD RSTD Inter-Frequency Measurements for NB-IOT
37.571-13GPPPart 1: Conformance test specificationRelease 16TSUser Equipment (UE) conformance specification for UE positioning
9.6.1 HD-FDD Inter-Frequency RSTD Measurement Accuracy for NB-IOT Inband Mode in normal coverage
9.6.1.1 Test purpose
To verify that the RSTD HD-FDD inter-frequency measurement accuracy is within the specified limits for NB-IOT Mode in normal coverage.
9.6.1.2 Test applicability
This test applies to NB-IOT E-UTRA HD-FDD UE release 14 and forward that supports UE-assisted OTDOA and inter-frequency RSTD measurements.
9.6.1.3 Minimum conformance requirements
The UE shall follow the procedure for RRC_IDLE state positioning measurement as defined in TS 36.305 [41] section 7.1.3.
When the physical layer cell identities of neighbour cells together with the OTDOA assistance data have been provided and the UE has entered the RRC_IDLE state, the UE shall be able to detect and measure inter-frequency RSTD, specified in TS 36.214 [6], for at least n = 16 cells, including the reference cell, on the same carrier frequency f1 as that of the reference cell within ms as given below:
,
where
is the total time for detecting and measuring at least n cells;
is the cell-specific positioning subframe configuration period as defined in TS 36.355 [4] if Part B subframe configuration is provided; otherwise if only Part A subframe configuration is provided, the equals to the length of the subframe pattern,
is the number of NPRS positioning occasions as defined in Table 9.6.1.3-1,
= ms is the measurement time for a single NPRS positioning occasion which includes the sampling time and the processing time;
is the cell-specific number of NPRS subframes within a NPRS occasion as defined in TS 36.355 [4] if Part B subframe configuration is provided; if only Part A subframe configuration is provided, the NPRS occasion length is 10 ms,
is the minimum number of NPRS subframes per cell measurement as defined in Table 9.6.1.3-2.
, , and , are the parameters of the same cell, for which is the largest among all the measured cells.
Table 9.6.1.3-1: Number of NPRS positioning occasions within
Positioning subframe configuration period |
Number of NPRS positioning occasions |
|
f1 Note1 |
f1 and f2 Note2 |
|
160 ms |
16* |
32* |
>160 ms |
8* |
16* |
Note 1: When only intra-frequency RSTD measurements are performed over cells belonging to the serving carrier frequency f1. Note 2: When intra-frequency RSTD and inter-frequency RSTD measurements are performed over cells belonging to the serving carrier frequency f1 and one inter-frequency carrier frequency f2, respectively. |
The UE physical layer shall be capable of reporting RSTD for the reference cell and all the neighbour cells i out of at least (n-1) neighbour cells within provided:
≥-6 dB for all Frequency Bands for the reference cell,
≥-13 dB for all Frequency Bands for neighbour cell i,
and conditions apply for all subframes of at least NPRS positioning occasions,
NPRP 1,2|dBm according to Annex E.5 for a corresponding Band
is defined as the ratio of the average received energy per PRS RE during the useful part of the symbol to the average received power spectral density of the total noise and interference for this RE, where the ratio is measured over all REs which carry NPRS.
The time starts from the point when the UE has received both the OTDOA-RequestLocationInformation message and the OTDOA assistance data in the OTDOA-ProvideAssistanceData message as specified in TS 36.355 [4], and the message and data have been delivered to the physical layer of the UE and the UE has entered the RRC_IDLE state.
The accuracy requirements in Table 9.6.1.3-2 are valid under the following conditions:
Conditions defined in 36.101 [2] Clause 7.3 for reference sensitivity are fulfilled.
NPRP 1,2|dBm according to Annex E.5 for a corresponding Band
There are no measurement gaps overlapping with the NPRS subframes of the measured serving cell.
The parameter expectedRSTDUncertainty signalled over LPP by E-SMLC as defined in TS 36.355 [4] is less than 5 µs.
Table 9.6.1.3-2: Inter RSTD measurement accuracy for normal coverage
Accuracy |
Conditions |
|||||
NPRS Ês/Iot |
UE NPRS measurement bandwidth on the reference cell and the measured neighbour cell i Note 3 |
Minimum number of available measurement subframes among the reference cell and the measured neighbour cell i, NNPRS_total Note 6 |
Io Note 4 range |
|||
E-UTRA operating band groups Note 5 |
Minimum |
Maximum |
||||
Ts Note 2 |
dB |
RB |
dBm/15kHz |
dBm/BWChannel |
||
±28 |
(NPRS Ês/Iot)ref ≥-6dB and (NPRS Ês/Iot)i ≥-13dB |
1 |
320 |
NFDD_G |
-118 |
-70 |
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: The serving cell, the reference cell, and the measured neighbour cell i are on the same carrier frequency. NOTE 4: The Io is defined in NPRS positioning subframes. The same Io range applies to NPRS and non-NPRS symbols. Io levels are different in NPRS and non-NPRS symbols within the same subframe. NOTE 5: E-UTRA operating band groups for NB-IoT are as defined in Section 4.11.1. NOTE 6: NNPRS_total can be in one or more NPRS positioning occasions. |
The normative reference for this requirement is TS 36.133 [23] clauses 4.8.3, 9.1.22.11, A.3.23.2 and A.9.8.17.
9.6.1.4 Test description
9.6.1.4.1 Initial conditions
Test Environment: Normal; as defined in TS 36.508 [18] clause 8.1.1.
Frequencies to be tested: Mid Range, as defined in TS 36.508 [18] clause 8.1.3.1.1.
Channel bandwidth to be tested: 10 MHz. If the band under test does not support 10 MHz bandwidth, 5 MHz shall be used.
1. Connect the SS and AWGN noise sources to the UE antenna connector or antenna connectors as shown in Annex A, Figure A.3 but using only the main TX/RX antenna.
2. The general test parameter settings are set up according to Table 9.6.1.4.1-1.
3. Propagation conditions are set according to clause 4.7.2.1.
4. Message contents are defined in clause 9.6.1.4.3.
5. The two NB-IOT cells are on different PRBs of the same LTE carrier frequency. The two LTE Cells are on the same carrier frequency. nCell 1 is the serving cell and OTDOA assistance data reference cell; nCell 2 is the neighbour cell. eCell 1 and eCell 2 are the LTE donor cells to nCell 1 and nCell 2, respectively. The assistance data neighbour cell list includes in total 15 cells, where 14 of the cells are not simulated (dummy cells; as defined in TS 37.571‑5 [20], clause 7.2.2).
6. The true RSTD (which is the receive time difference for frame 0 between nCell 2 and nCell 1 as seen at the UE antenna connector) is set to 92 Ts (about 3 s). Note that the related expectedRSTD values to be signalled over LPP are defined in Table 9.6.1.4-1.
Table 9.6.1.4-1: General test parameters
Parameter |
Unit |
Value |
Comment |
NB-IoT operational mode |
Inband |
||
Reference cell |
nCell 1 |
||
Neighbor cells |
nCell 2, eCell 2 and eCell 1 |
||
NPDCCH parameters |
R.26 HD-FDD |
As defined in TS 36.133 [23] section A.3.1.6.1 |
|
nprsID |
Test1: (nprsID of Cell 1 – nprsID of Cell 2)mod6=1 |
As defined in TS36.355 [4] |
|
nprs-period |
ms |
1280 |
As defined in TS36.355 [4] |
nprs-startSF |
sf0 |
Subframe offset of the NPRS positioning occasion as defined in TS36.355 [4] |
|
nprs-slotNumberOffset |
0 |
As defined in TS36.355 [4] |
|
nprs-SubframeOffset |
640 |
As defined in TS36.355 [4] |
|
Number of consecutive downlink positioning subframes nprs-NumSF |
640 |
As defined in TS36.355 [4] |
|
NPRS muting info |
nCell 1: ‘1111111100000000’ nCell 2: ‘1111111100000000’ |
Corresponds to nprs-MutingInfoB defined in TS 36.355 [4] |
|
PartA Configuration |
as in the following 3 rows |
||
subframePattern10 |
‘0111001110’ |
Corresponds to subframePattern10-r14 defined in TS 36.355 [4] |
|
nprsSequenceInfo nCell1 |
BWchannel 5MHz: 54 BWchannel 10MHz: 130 |
Corresponds to nprsSequenceInfo defined in TS 36.355 [4] |
|
nprsSequenceInfo nCell2 |
BWchannel 5MHz: 59 BWchannel 10MHz: 135 |
Corresponds to nprsSequenceInfo defined in TS 36.355 [4] |
|
CP length |
Normal |
||
NPRACH Configuration |
NPRACH.R-1 |
Refer to TS 36.133 [23] section A.3.18 |
|
DRX cycle length |
1.28 |
The value shall be used for all cells in the test. |
|
Expected RSTD |
μs |
nCell 2: 3 Other neighbour cells: randomly between -3 and 3 |
The expected RSTD is what is expected at the receiver. The corresponding parameter in the OTDOA assistance data specified in TS 36.355 [4] is the expectedRSTD indicator |
Expected RSTD uncertainty for all neighbour cells |
μs |
5 |
The corresponding parameter in the OTDOA assistance data specified in TS 36.355 [4] is the expectedRSTD-Uncertainty index |
Number of cells provided in OTDOA assistance data |
16 |
Including the reference cell |
|
Measurement period |
s |
20.48 |
Derived according to the RSTD measurement period in clause 9.6.1.3 |
9.6.1.4.2 Test procedure
The test consists of a set-up period and a measurement period. nCell 1 and nCell 2 (and their LTE donor cells eCell 1 and eCell 2) are 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 9.6.1.4.3 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-NB with CP CIoT optimisation according to TS 36.508 [18] clause 8.1.5 in nCell 1.
2. The SS shall send a RESET UE POSITIONING STORED INFORMATION message.
3. Set the parameters according to Table 9.6.1.5-1 and Table 9.6.1.5-2 as appropriate. Propagation conditions are set according to clause 4.7.2.1.
4. The SS shall send an LPP REQUEST CAPABILITIES message.
5. The UE shall send an LPP PROVIDE CAPABILITIES message indicating the OTDOA capabilities supported by the UE in the OTDOA-ProvideCapabilities IE.
6. The SS shall send a LPP PROVIDE ASSISTANCE DATA message, including the OTDOA‑ProvideAssistanceData IE. If the UE message at step 5 includes the ackRequested IE set to TRUE, then the SS shall send an acknowledgment in the LPP PROVIDE ASSISTANCE DATA message.
7. 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.
8. When the Inactivity Timer expires, the SS shall send a RRC Connection Release to send the UE to RRC_IDLE state.
9. The UE shall perform location measurements in RRC_IDLE state start a Mobile Originated Data Transport according to TS 23.401 [42] clause 5.3.4B.2.
10. When the signalling connection between the UE and SS is re-established, the UE shall transmit a LPP PROVIDE LOCATION INFORMATION message, including the OTDOA‑ProvideLocationInformation IE.
11. If the UE message at step 10 includes the ackRequested IE set to TRUE, the SS shall send a LPP acknowledgement message.
12. The SS shall check the rstd value for nCell 2 in the OTDOA-SignalMeasurementInformation IE according to Table 9.6.1.5-3.
13. Repeat step 2-12 until the confidence level according to Annex D is achieved.
9.6.1.4.3 Message contents
Same as clause 9.5.1.4.3 with the following exceptions:
Table 9.6.1.4.3-1: LPP RequestLocationInformation
Derivation Path: Table 9.5.1.4.3-2 |
|||
Information Element |
Value/remark |
Comment |
Condition |
LPP-Message ::= SEQUENCE { |
|||
lpp-MessageBody CHOICE { |
|||
c1 CHOICE { |
|||
requestLocationInformation SEQUENCE { |
|||
criticalExtensions CHOICE { |
|||
c1 CHOICE { |
|||
requestLocationInformation-r9 SEQUENCE { |
|||
commonIEsRequestLocationInformation SEQUENCE { |
|||
qos SEQUENCE { |
|||
responseTime SEQUENCE { |
|||
time |
21 |
See Measurement Period of Table 9.6.1.4.1-1 |
|
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
|||
} |
9.6.1.5 Test requirement
Table 9.6.1.5-1 and 9.6.1.5-2 define the primary level settings including test tolerances for all tests.
The RSTD FDD inter-frequency accuracy test shall meet the reported values in Table 9.6.1.5-3.
Table 9.6.1.5-1: Cell Specific Test Parameters for inter frequency RSTD Tests for NB-IOT Cells
Parameter |
Unit |
Test 1 |
|
nCell 1 |
nCell 2 |
||
BWchannel |
kHz |
180 |
180 |
PRB location within eCell |
eCell 1 BWchannel 5MHz: 17 eCell 1 BWchannel 10MHz: 30 |
eCell 2 BWchannel 5MHz: 22 eCell 2 BWchannel 10MHz: 35 |
|
NPBCH_RA |
dB |
0 |
0 |
NPBCH_RB |
|||
NPSS_RA |
|||
NSSS_RA |
|||
NPDCCH_RA |
|||
NPDCCH_RB |
|||
NPDSCH_RA |
|||
NPDSCH_RB |
|||
OCNG_RA Note 1 |
|||
OCNG_RB Note 1 |
|||
Note 2 |
dBm/ 15 kHz |
-98 |
-98 |
NPRS_RA |
dB |
-12.7 |
-16.7 |
NPRS |
dB |
-5.7 |
-12.7 |
NPRS Note 3 |
dB |
-5.7 |
-12.7 |
Io Note 3 |
dBm/ 180kHz |
-79.90 |
-82.90 |
NPRP Note 3 |
dBm/ 15 kHz |
-103.7 |
-110.7 |
NRSRP Note 3 |
dBm/ 15 kHz |
-91 |
-94 |
Note 3 |
dB |
7 |
4 |
Propagation Condition |
AWGN |
AWGN |
|
Antenna Configuration |
1×1 |
1×1 |
|
Timing offset to nCell 1 |
us |
N/A |
3 |
Note 1: OCNG shall be used such that active cells are fully allocated and a constant total transmitted power spectral density is achieved for all OFDM symbols other than those in the subframes with transmitted NPRS. Note 2: Interference from other cells and noise sources not specified in the test are assumed to be constant over subcarriers and time and shall be modelled as AWGN of appropriate power for to be fulfilled. Note 3: If NPRS_RA is not “N/A”, , NPRS , Io, NRSRP and NPRP levels have been derived from other parameters and are given for information purpose. If NPRS_RA is “N/A”, Io and NRSRP levels have been derived from other parameters and are given for information purpose. These are not settable test parameters. Interference conditions shall be applied to all PRS symbols of DL positioning subframes. |
Table 9.6.1.5-2: Cell Specific Test Parameters for inter frequency RSTD Tests for E-UTRA Cells
Parameter |
Unit |
eCell 1 |
eCell 2 |
|||||
T1 |
T2 |
T3 |
T1 |
T2 |
T3 |
|||
BWchannel |
MHz |
5 or 10 |
5 or 10 |
|||||
NOCNG Pattern defined in TS 36.133 [23] section A.3.2.3 |
– |
BWchannel 5MHz: NOP.4 FDD BWchannel 10MHz: NOP.1 FDD |
BWchannel 5MHz: NOP.4 FDD BWchannel 10MHz: NOP.1 FDD |
|||||
PBCH_RA |
dB |
-3 |
-3 |
|||||
PBCH_RB |
dB |
|||||||
PSS_RA |
dB |
|||||||
SSS_RA |
dB |
|||||||
PDCCH_RA |
dB |
|||||||
PDCCH_RB |
dB |
|||||||
PDSCH_RA |
dB |
|||||||
PDSCH_RB |
dB |
|||||||
OCNG_RANote 1 |
dB |
|||||||
OCNG_RBNote 1 |
dB |
|||||||
Note2 |
dBm/15 kHz |
-98 |
-98 |
|||||
Note2 |
dBm |
7 |
7 |
7 |
4 |
4 |
4 |
|
Propagation Condition |
AWGN |
AWGN |
||||||
Antenna Configuration |
1×1 |
1×1 |
||||||
Timing offset to eCell 1 |
ms |
– |
3 |
|||||
Note 1: 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 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 . |
Table 9.6.1.5-3: RSTD HD-FDD inter-frequency accuracy requirements for the reported values
Lowest reported value |
RSTD_6417 |
Highest reported value |
RSTD_6477 |
For the overall test to pass, the ratio of successful reported values shall be more than 90% with a confidence level of 95%.
The expected response time is 21 s. The response time is equal to the LPP time IE value. The LPP time IE value is derived from the RSTD reporting delay plus ΔT, where ΔT = 150 ms, giving a value of 20630 ms. This is rounded up to the next allowed LPP value of 21 seconds. The RSTD measurement reporting delay in the test is derived from the following expression, , where =1280 ms, =16, = , =320 ms, =640 ms and =16. All the parameters are specified in clause 9.6.1.3 and Table 9.6.1.3‑1. This gives the total RSTD reporting delay of 20480 ms for the 15 neighbour cells including nCell 2 with respect to the reference cell, nCell 1. This expected response time excludes any delay caused by RRC connection release before the RRC_IDLE mode measurement. This expected response time excludes any delay caused by establishing a signalling connection with the SS (including random access procedure) as defined in TS 36.305 [41] for LPP measurement reporting. The response time is not explicitly evaluated for this test; hence, no test tolerance values need to be applied.
9.6.2 HD-FDD Inter-Frequency RSTD Measurement Accuracy for NB-IOT Inband Mode in enhanced coverage
9.6.2.1 Test purpose
To verify that the RSTD HD-FDD inter-frequency measurement accuracy is within the specified limits for NB-IOT Inband Mode in enhanced coverage.
9.6.2.2 Test applicability
This test applies to NB-IOT E-UTRA HD-FDD UE release 14 and forward that supports UE-assisted OTDOA and inter-frequency RSTD measurements.
9.6.2.3 Minimum conformance requirements
Same as clause 9.6.1.3, replacing Table 9.6.1.3-1 with Table 9.6.2.3-1 and Table 9.6.1.3-2 with Table 9.6.2.3-2.
Table 9.6.2.3-1: Number of NPRS positioning occasions within
Positioning subframe configuration period |
Number of NPRS positioning occasions |
|
f1 Note1 |
f1 and f2 Note2 |
|
160 ms |
16* |
32* |
>160 ms |
8* |
16* |
Note 1: When only intra-frequency RSTD measurements are performed over cells belonging to the serving carrier frequency f1. Note 2: When intra-frequency RSTD and inter-frequency RSTD measurements are performed over cells belonging to the serving carrier frequency f1 and one inter-frequency carrier frequency f2, respectively. |
Table 9.6.2.3-2: Inter RSTD measurement accuracy for normal coverage
Accuracy |
Conditions |
|||||
NPRS Ês/Iot |
UE NPRS measurement bandwidth on the reference cell and the measured neighbour cell i Note 3 |
Minimum number of available measurement subframes among the reference cell and the measured neighbour cell i, NNPRS_total Note 6 |
Io Note 4 range |
|||
E-UTRA operating band groups Note 5 |
Minimum |
Maximum |
||||
Ts Note 2 |
dB |
RB |
dBm/15kHz |
dBm/BWChannel |
||
±40 |
(NPRS Ês/Iot)ref ≥-15dB and (NPRS Ês/Iot)i ≥-15dB |
1 |
320 |
NFDD_G |
-118 |
-70 |
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: The serving cell, the reference cell, and the measured neighbour cell i are on the same carrier frequency. NOTE 4: The Io is defined in NPRS positioning subframes. The same Io range applies to NPRS and non-NPRS symbols. Io levels are different in NPRS and non-NPRS symbols within the same subframe. NOTE 5: E-UTRA operating band groups for NB-IoT are as defined in Section 4.11.1. NOTE 6: NNPRS_total can be in one or more NPRS positioning occasions. |
The normative reference for this requirement is TS 36.133 [23] clauses 4.8.4, 9.1.22.13, A.3.23.2 and A.9.8.19.
9.6.2.4 Test description
9.6.2.4.1 Initial conditions
Test Environment: Normal; as defined in TS 36.508 [18] clause 8.1.1.
Frequencies to be tested: Mid Range, as defined in TS 36.508 [18] clause 8.1.3.1.1.
Channel bandwidth to be tested: 10 MHz. If the band under test does not support 10 MHz bandwidth, 5 MHz shall be used.
1. Connect the SS and AWGN noise sources to the UE antenna connector or antenna connectors as shown in Annex A, Figure A.3 but using only the main TX/RX antenna.
2. The general test parameter settings are set up according to Table 9.6.2.4.1-1.
3. Propagation conditions are set according to clause 4.7.2.1.
4. Message contents are defined in clause 9.6.2.4.3.
5. The two NB-IOT cells are on different PRBs of the same LTE carrier frequency. The two LTE Cells are on the same carrier frequency. nCell 1 is the serving cell and OTDOA assistance data reference cell; nCell 2 is the neighbour cell. eCell 1 and eCell 2 are the LTE donor cells to nCell 1 and nCell 2, respectively. The assistance data neighbour cell list includes in total 15 cells, where 14 of the cells are not simulated (dummy cells; as defined in TS 37.571‑5 [20], clause 7.2.2).
6. The true RSTD (which is the receive time difference for frame 0 between nCell 2 and nCell 1 as seen at the UE antenna connector) is set to 92 Ts (about 3 s). Note that the related expectedRSTD values to be signalled over LPP are defined in Table 9.6.2.4-1.
Table 9.6.2.4-1: General test parameters
Parameter |
Unit |
Value |
Comment |
NB-IoT operational mode |
Inband |
||
Reference cell |
nCell 1 |
||
Neighbor cells |
nCell 2, eCell 2 and eCell 1 |
||
NPDCCH parameters |
R.26 HD-FDD |
As defined in TS 36.133 [23] section A.3.1.6.1 |
|
nprsID |
Test1: (nprsID of Cell 1 – nprsID of Cell 2)mod6=1 |
As defined in TS36.355 [4] |
|
nprs-period |
ms |
1280 |
As defined in TS36.355 [4] |
nprs-startSF |
sf0 |
Subframe offset of the NPRS positioning occasion as defined in TS36.355 [4] |
|
nprs-slotNumberOffset |
0 |
As defined in TS36.355 [4] |
|
nprs-SubframeOffset |
640 |
As defined in TS36.355 [4] |
|
Number of consecutive downlink positioning subframes nprs-NumSF |
640 |
As defined in TS36.355 [4] |
|
NPRS muting info |
nCell 1: ‘1111111100000000’ nCell 2: ‘1111111100000000’ |
Corresponds to nprs-MutingInfoB defined in TS 36.355 [4] |
|
PartA Configuration |
as in the following 3 rows |
||
subframePattern10 |
‘0111001110’ |
Corresponds to subframePattern10-r14 defined in TS 36.355 [4] |
|
nprsSequenceInfo nCell1 |
BWchannel 5MHz: 54 BWchannel 10MHz: 130 |
Corresponds to nprsSequenceInfo defined in TS 36.355 [4] |
|
nprsSequenceInfo nCell2 |
BWchannel 5MHz: 59 BWchannel 10MHz: 135 |
Corresponds to nprsSequenceInfo defined in TS 36.355 [4] |
|
CP length |
Normal |
||
NPRACH Configuration |
NPRACH.R-1 |
Refer to TS 36.133 [23] section A.3.18 |
|
DRX cycle length |
1.28 |
The value shall be used for all cells in the test. |
|
Expected RSTD |
μs |
nCell 2: 3 Other neighbour cells: randomly between -3 and 3 |
The expected RSTD is what is expected at the receiver. The corresponding parameter in the OTDOA assistance data specified in TS 36.355 [4] is the expectedRSTD indicator |
Expected RSTD uncertainty for all neighbour cells |
μs |
5 |
The corresponding parameter in the OTDOA assistance data specified in TS 36.355 [4] is the expectedRSTD-Uncertainty index |
Number of cells provided in OTDOA assistance data |
16 |
Including the reference cell |
|
Measurement period |
s |
20.48 |
Derived according to the RSTD measurement period in clause 9.6.2.3 |
9.6.2.4.2 Test procedure
The test consists of a set-up period and a measurement period. nCell 1 and nCell 2 (and their LTE donor cells eCell 1 and eCell 2) are 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 9.6.2.4.3 shall be provided to the UE during the set-up period. The last TTI containing the OTDOA-RequestLocationInformation message of the last NPDCCH repetition 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-NB with CP CIoT optimisation according to TS 36.508 [18] clause 8.1.5 in nCell 1.
2. The SS shall send a RESET UE POSITIONING STORED INFORMATION message.
3. Set the parameters according to Table 9.6.2.5-1 and Table 9.6.2.5-2 as appropriate. Propagation conditions are set according to clause 4.7.2.1.
4. The SS shall send an LPP REQUEST CAPABILITIES message.
5. The UE shall send an LPP PROVIDE CAPABILITIES message indicating the OTDOA capabilities supported by the UE in the OTDOA-ProvideCapabilities IE.
6. The SS shall send a LPP PROVIDE ASSISTANCE DATA message, including the OTDOA‑ProvideAssistanceData IE. If the UE message at step 5 includes the ackRequested IE set to TRUE, then the SS shall send an acknowledgment in the LPP PROVIDE ASSISTANCE DATA message.
7. 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.
8. When the Inactivity Timer expires, the SS shall send a RRC Connection Release to send the UE to RRC_IDLE state.
9. The UE shall perform location measurements in RRC_IDLE state start a Mobile Originated Data Transport according to TS 23.401 [42] clause 5.3.4B.2.
10. When the signalling connection between the UE and SS is re-established, the UE shall transmit a LPP PROVIDE LOCATION INFORMATION message, including the OTDOA‑ProvideLocationInformation IE.
11. If the UE message at step 10 includes the ackRequested IE set to TRUE, the SS shall send a LPP acknowledgement message.
12. The SS shall check the rstd value for nCell 2 in the OTDOA-SignalMeasurementInformation IE according to Table 9.6.2.5-3.
13. Repeat step 2-12 until the confidence level according to Annex D is achieved.
9.6.2.4.3 Message contents
Same as clause 9.6.1.4.3.
9.6.2.5 Test requirement
Table 9.6.2.5-1 and 9.6.2.5-2 define the primary level settings including test tolerances for all tests.
The RSTD FDD inter-frequency accuracy test shall meet the reported values in Table 9.6.2.5-3.
Table 9.6.2.5-1: Cell Specific Test Parameters for inter frequency RSTD Tests for NB-IOT Cells
Parameter |
Unit |
Test 1 |
|
nCell 1 |
nCell 2 |
||
BWchannel |
kHz |
180 |
180 |
PRB location within eCell |
eCell 1 BWchannel 5MHz: 17 eCell 1 BWchannel 10MHz: 30 |
eCell 2 BWchannel 5MHz: 22 eCell 2 BWchannel 10MHz: 35 |
|
NPBCH_RA |
dB |
0 |
0 |
NPBCH_RB |
|||
NPSS_RA |
|||
NSSS_RA |
|||
NPDCCH_RA |
|||
NPDCCH_RB |
|||
NPDSCH_RA |
|||
NPDSCH_RB |
|||
OCNG_RA Note 1 |
|||
OCNG_RB Note 1 |
|||
Note 2 |
dBm/ 15 kHz |
-110 |
-110 |
NPRS_RA |
dB |
-12.7 |
-2.7 |
NPRS |
dB |
-14.7 |
-14.7 |
NPRS Note 3 |
dB |
-14.7 |
-14.7 |
Io Note 3 |
dBm/ 180kHz |
-101.20 |
-111.20 |
NPRP Note 3 |
dBm/ 15 kHz |
-124.7 |
-124.7 |
NRSRP Note 3 |
dBm/ 15 kHz |
-112 |
-122 |
Note 3 |
dB |
-2 |
-12 |
Propagation Condition |
AWGN |
AWGN |
|
Antenna Configuration |
1×1 |
1×1 |
|
Timing offset to nCell 1 |
us |
N/A |
3 |
Note 1: OCNG shall be used such that active cells are fully allocated and a constant total transmitted power spectral density is achieved for all OFDM symbols other than those in the subframes with transmitted NPRS. Note 2: Interference from other cells and noise sources not specified in the test are assumed to be constant over subcarriers and time and shall be modelled as AWGN of appropriate power for to be fulfilled. Note 3: If NPRS_RA is not “N/A”, , NPRS , Io, NRSRP and NPRP levels have been derived from other parameters and are given for information purpose. If NPRS_RA is “N/A”, Io and NRSRP levels have been derived from other parameters and are given for information purpose. These are not settable test parameters. Interference conditions shall be applied to all PRS symbols of DL positioning subframes. |
Table 9.6.2.5-2: Cell Specific Test Parameters for inter frequency RSTD Tests for E-UTRA Cells
Parameter |
Unit |
eCell 1 |
eCell 2 |
|||||
T1 |
T2 |
T3 |
T1 |
T2 |
T3 |
|||
BWchannel |
MHz |
5 or 10 |
5 or 10 |
|||||
NOCNG Pattern defined in TS 36.133 [23] section A.3.2.3 |
– |
BWchannel 5MHz: NOP.4 FDD BWchannel 10MHz: NOP.1 FDD |
BWchannel 5MHz: NOP.4 FDD BWchannel 10MHz: NOP.1 FDD |
|||||
PBCH_RA |
dB |
-3 |
-3 |
|||||
PBCH_RB |
dB |
|||||||
PSS_RA |
dB |
|||||||
SSS_RA |
dB |
|||||||
PDCCH_RA |
dB |
|||||||
PDCCH_RB |
dB |
|||||||
PDSCH_RA |
dB |
|||||||
PDSCH_RB |
dB |
|||||||
OCNG_RANote 1 |
dB |
|||||||
OCNG_RBNote 1 |
dB |
|||||||
Note2 |
dBm/15 kHz |
-110 |
-110 |
|||||
Note2 |
dBm |
-2 |
-2 |
-2 |
-12 |
-12 |
-12 |
|
Propagation Condition |
AWGN |
AWGN |
||||||
Antenna Configuration |
1×1 |
1×1 |
||||||
Timing offset to eCell 1 |
ms |
– |
3 |
|||||
Note 1: 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 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 . |
Table 9.6.2.5-3: RSTD HD-FDD inter-frequency accuracy requirements for the reported values
Lowest reported value |
RSTD_6405 |
Highest reported value |
RSTD_6489 |
For the overall test to pass, the ratio of successful reported values shall be more than 90% with a confidence level of 95%.
The expected response time is 21 s. The response time is equal to the LPP time IE value. The LPP time IE value is derived from the RSTD reporting delay plus ΔT, where ΔT = 150 ms, giving a value of 20630 ms. This is rounded up to the next allowed LPP value of 21 seconds. The RSTD measurement reporting delay in the test is derived from the following expression, , where =1280 ms, =16, = , =320 ms, =640 ms and =16. All the parameters are specified in clause 9.6.2.3 and Table 9.6.2.3‑1. This gives the total RSTD reporting delay of 20480 ms for the 15 neighbour cells including nCell 2 with respect to the reference cell, nCell 1. This expected response time excludes any delay caused by RRC connection release before the RRC_IDLE mode measurement. This expected response time excludes any delay caused by establishing a signalling connection with the SS (including random access procedure) as defined in TS 36.305 [41] for LPP measurement reporting. The response time is not explicitly evaluated for this test; hence, no test tolerance values need to be applied.
9.6.3 HD-FDD Inter frequency RSTD Measurement Reporting Delay for NB-IOT Standalone Mode in enhanced coverage
9.6.3.1 Test purpose
To verify that the RSTD HD-FDD inter-frequency measurement reporting delay is within the specified limits for NB-IOT Standalone Mode in enhanced coverage.
9.6.3.2 Test applicability
This test applies to NB-IOT E-UTRA HD-FDD UE release 14 and forward that supports UE-assisted OTDOA and inter-frequency RSTD measurements.
9.6.3.3 Minimum conformance requirements
The UE shall follow the procedure for RRC_IDLE state positioning measurement as defined in TS 36.305 [41] section 7.1.3.
When the physical layer cell identities of neighbour cells together with the OTDOA assistance data have been provided and the UE has entered the RRC_IDLE state, the UE shall be able to detect and measure inter-frequency RSTD, specified in TS 36.214 [6], for at least n = 16 cells, including the reference cell, on the same carrier frequency f1 as that of the reference cell within ms as given below:
,
where
is the total time for detecting and measuring at least n cells;
is the cell-specific positioning subframe configuration period as defined in TS 36.355 [4] if Part B subframe configuration is provided; otherwise if only Part A subframe configuration is provided, the equals to the length of the subframe pattern,
is the number of NPRS positioning occasions as defined in Table 9.6.3.3-1,
= ms is the measurement time for a single NPRS positioning occasion which includes the sampling time and the processing time;
is the cell-specific number of NPRS subframes within a NPRS occasion as defined in TS 36.355 [4] if Part B subframe configuration is provided; if only Part A subframe configuration is provided, the NPRS occasion length is 10 ms,
is the minimum number of NPRS subframes per cell measurement as defined in Table 9.6.2.3-2.
, , and , are the parameters of the same cell, for which is the largest among all the measured cells.
Table 9.6.3.3-1: Number of NPRS positioning occasions within
Positioning subframe configuration period |
Number of NPRS positioning occasions |
|
f1 Note1 |
f1 and f2 Note2 |
|
160 ms |
16* |
32* |
>160 ms |
8* |
16* |
Note 1: When only intra-frequency RSTD measurements are performed over cells belonging to the serving carrier frequency f1. Note 2: When intra-frequency RSTD and inter-frequency RSTD measurements are performed over cells belonging to the serving carrier frequency f1 and one inter-frequency carrier frequency f2, respectively. |
The UE physical layer shall be capable of reporting RSTD for the reference cell and all the neighbour cells i out of at least (n-1) neighbour cells within provided:
≥-15 dB for all Frequency Bands for the reference cell,
≥-15 dB for all Frequency Bands for neighbour cell i,
and conditions apply for all subframes of at least NPRS positioning occasions,
NPRP 1,2|dBm according to Annex E.5 for a corresponding Band
is defined as the ratio of the average received energy per PRS RE during the useful part of the symbol to the average received power spectral density of the total noise and interference for this RE, where the ratio is measured over all REs which carry NPRS.
The time starts from the point when the UE has received both the OTDOA-RequestLocationInformation message and the OTDOA assistance data in the OTDOA-ProvideAssistanceData message as specified in TS 36.355 [4], and the message and data have been delivered to the physical layer of the UE and the UE has entered the RRC_IDLE state.
After receiving both the OTDOA-RequestLocationInformation message and the OTDOA assistance data in the OTDOA-ProvideAssistanceData message as specified in TS 36.355 [4], the UE shall be sent to RRC IDLE state. The maximum allowed RSTD reporting delay is defined as the time between the point when the UE has entered the RRC_IDLE state, and the point when the UE is ready to transmit the measurement report over the air interface and starts to establish a signalling connection with the MME.
The maximum allowed RSTD reporting delay shall be less than +TRandomAccess_NB-IoT-EC.
The normative reference for this requirement is TS 36.133 [23] clauses 4.8.4, 4.8.4.1, A.3.23.2 and A.4.7.2.
9.6.3.4 Test description
9.6.3.4.1 Initial conditions
Test Environment: Normal; as defined in TS 36.508 [18] clause 8.1.1.
Frequencies to be tested: Mid Range, as defined in TS 36.508 [18] clause 8.1.3.1.1.
Channel bandwidth to be tested: 200 kHz as defined in TS 36.508 [18] clause 8.1.3.1.
1. Connect the SS and AWGN noise sources to the UE antenna connector or antenna connectors as shown in Annex A, Figure A.3 but using only the main TX/RX antenna.
2. The general test parameter settings are set up according to Table 9.6.3.4.1-1.
3. Propagation conditions are set according to clause 4.7.2.1.
4. Message contents are defined in clause 9.6.3.4.3.
5. There are three synchronous cells: nCell 1, nCell 2 and nCell 3. nCell 1 is the reference as well as the serving cell. nCell 2 and nCell 3 are the neighbour cells. nCell 1 is on one RF channel, nCell 2 and 3 are on a different RF channel. The assistance data neighbour cell list includes in total 15 cells, where 13 of the cells are not simulated (dummy cells; as defined in TS 37.571‑5 [20], clause 7.2.2).
6. The true RSTD (which is the received time difference for frame 0 between two cells as seen at the UE antenna connector) is set to 31 Ts (about 1 s) between neighbour nCell 2 and serving nCell 1; and set to -31 Ts (about -1 s) between neighbour nCell 3 and serving nCell 1.
Table 9.6.3.4-1: General test parameters
Parameter |
Unit |
Value |
Comment |
NB-IoT operational mode |
Standalone |
||
Reference cell |
nCell 1 |
Reference cell is the cell in the OTDOA assistance data with respect to which the RSTD measurement is defined, as specified in TS 36.214 [6] and TS 36.355 [4]. The reference cell is the PCell in this test case. |
|
Neighbor cells |
nCell 2 and nCell 3 |
Cell 2 and Cell 3 appear at random places in the neighbour cell list in the OTDOA assistance data, but Cell 2 always appears in the first half of the list, whilst Cell 3 appears in the second half of the list. |
|
nprsID |
(nprsID of Cell 1 – nprsID of Cell 2)mod6=1 and (nprsID of Cell 1 – nprsID of Cell 3)mod6=2 |
As defined in TS 36.355 [4] |
|
nprs-period |
ms |
640 |
As defined in TS 36.355 [4] |
nprs-startSF |
sf0 |
Subframe offset of the NPRS positioning occasion as defined in TS36.355 [4] |
|
Number of consecutive downlink positioning subframes nprs-NumSF |
320 |
As defined in TS36.355 [4] |
|
nprs-SubframeOffset |
0 |
As defined in TS36.355 [4] |
|
NPRS muting info |
Cell 1: ‘1111111100000000’ Cell 2: ‘0000000011111111’ Cell 3: ‘1111111100000000’ |
Corresponds to nprs-MutingInfoB defined in TS 36.355 [4] |
|
Part A Configuration |
N/A |
NPRS is configured based on Part B but not Part A. |
|
CP length |
Normal |
||
NPRACH Configuration |
NPRACH.R-1 |
Refer to A.3.18 |
|
DRX cycle length |
1.28 |
The value shall be used for all cells in the test. |
|
Radio frame receive time offset between the cells at the UE antenna connector |
μs |
nCell 2 to nCell 1: 1 nCell 3 to nCell 1: -1 |
PRS are transmitted from synchronous cells |
Expected RSTD |
μs |
Cell 2: -2 Cell 3: 2 Other neighbour cells: randomly between -3 and 3 |
The expected RSTD is what is expected at the receiver. The corresponding parameter in the OTDOA assistance data specified in TS 36.355 [4] is the expectedRSTD indicator |
Expected RSTD uncertainty for all neighbour cells |
μs |
5 |
The corresponding parameter in the OTDOA assistance data specified in TS 36.355 [4] is the expectedRSTD-Uncertainty index |
Number of cells provided in OTDOA assistance data |
16 |
Including the reference cell |
|
T1 |
s |
– |
The length of the time interval from the beginning of the test until T2 |
T2 |
s |
5.12 |
The length of the time interval that follows immediately after time interval T1 |
T3 |
s |
5.12 |
The length of the time interval that follows immediately after time interval T2 |
T4 |
s |
5.12 |
The length of the time interval that follows immediately after time interval T3 |
T5 |
s |
5.12 |
The length of the time interval that follows immediately after time interval T4 |
T6 |
s |
≥ 57 |
The length of the time interval that follows immediately after time interval T5 |
9.6.3.4.2 Test procedure
The test consists of six consecutive time intervals, with durations of T1, T2, T3, T4, T5 and T6. nCell 1 is active throughout T1, T2, T3, T4, T5 and T6, whilst nCell 2 and nCell 3 are activated only in the beginning of T2. nCell 2 is active until the end of T5 and nCell 3 is active until the end of T4. nCell 1 transmits NPRS in T2 and T4, while nCell 2 transmits NPRS in T3 and T5 and nCell 3 transmits NPRS only in T2 and T4. Note: The information on when NPRS is muted is conveyed to the UE using PRS muting information.
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 9.6.3.4.3 shall be provided to the UE during the set-up period, T1. After the receipt of the OTDOA assistance data and OTDOA-RequestLocationInformation, the UE is provided with a RRC connection release command. The last TTI containing the RRC connection release command shall be provided to the UE ΔT ms before the start of T2 where ΔT = 150 ms. The UE is then expected to enter RRC_IDLE state before T4.
1. Ensure that the UE is in state Generic RB Established State 3A-NB with CP CIoT optimisation according to TS 36.508 [18] clause 8.1.5 in nCell 1.
2. T1 starts.
3. The SS shall send a RESET UE POSITIONING STORED INFORMATION message.
4. Set the parameters according to Table 9.6.3.5-1 and Table 9.6.3.5-2 as appropriate. Propagation conditions are set according to clause 4.7.2.1.
5. The SS shall send an LPP REQUEST CAPABILITIES message.
6. The UE shall send an LPP PROVIDE CAPABILITIES message indicating the OTDOA capabilities supported by the UE in the OTDOA-ProvideCapabilities IE.
7. The SS shall send a LPP PROVIDE ASSISTANCE DATA message, including the OTDOA‑ProvideAssistanceData IE. If the UE message at step 6 includes the ackRequested IE set to TRUE, then the SS shall send an acknowledgment in the LPP PROVIDE ASSISTANCE DATA message.
8. The SS shall send a LPP REQUEST LOCATION INFORMATION message, including the OTDOA‑RequestLocationInformation IE.
9. The SS shall send a RRC Connection Release to send the UE to RRC_IDLE state and ΔT ms after the last TTI containing the RRC connection release command, T2 starts, where ΔT = 150 ms.
10. At the start of T2, the SS shall switch the power setting from T1 to T2 as specified in Table 9.6.3.5-2.
11. When T2 expires, the SS shall switch the power setting from T2 to T3 as specified in Table 9.6.3.5-2.
12. When T3 expires, the SS shall switch the power setting from T3 to T4 as specified in Table 9.6.3.5-2.
13. When T4 expires, the SS shall switch the power setting from T4 to T5 as specified in Table 9.6.3.5-2.
14. When T5 expires, the SS shall switch the power setting from T5 to T6 as specified in Table 9.6.3.5-1.
15. The UE shall perform location measurements in RRC_IDLE state and then start a Mobile Originated Data Transport according to TS 23.401 [42] clause 5.3.4B.2.
16. When the signalling connection between the UE and SS is re-established, the UE shall transmit a LPP PROVIDE LOCATION INFORMATION message, including the OTDOA‑ProvideLocationInformation IE. The LPP PROVIDE LOCATION INFORMATION shall be transmitted within the response time (see clause 4.7.3) specified in clause 9.6.3.5. The UE shall perform and report the RSTD measurements for both nCell 2 and nCell 3 with respect to the reference cell in the OTDOA assistance data, nCell 1. If the UE transmits an OTDOA‑ProvideLocationInformation IE including the rstd field for both nCell 2 and nCell 3 within the response time then the number of successful tests is increased by one. If the UE fails to report the OTDOA‑ProvideLocationInformation IE with both the rstd fields included within the response time then the number of failure tests is increased by one.
17. If the UE message at step 16 includes the ackRequested IE set to TRUE, the SS shall send a LPP acknowledgement message.
18. Repeat step 2-17 until the confidence level according to Annex D is achieved.
9.6.3.4.3 Message contents
Same as in Clause 9.5.3.4.3.
9.6.3.5 Test requirement
Table 9.6.3.5-1 and 9.6.3.5-2 define the primary level settings including test tolerances for all tests.
Table 9.6.3.5-1: Cell Specific Test Parameters for Inter frequency RSTD Tests for T1 and T6
Parameter |
Unit |
nCell 1 |
nCell 2 |
nCell 3 |
||
NB-IoT RF Channel Number |
1 |
2 |
2 |
|||
NB-IoT Channel Bandwidth (BWchannel) |
kHz |
200 |
200 |
200 |
||
OCNG Pattern Note 1 |
NOP.3 FDD |
N/A |
N/A |
|||
NPDSCH parameters Note 2 |
R.18 HD-FDD |
N/A |
N/A |
|||
NPDCCH parameters Note 2 |
R.30 HD-FDD |
N/A |
N/A |
|||
NPBCH_RA |
dB |
0 |
N/A |
N/A |
||
NPBCH_RB |
||||||
NPSS_RA |
||||||
NSSS_RA |
||||||
NPDCCH_RA |
||||||
NPDCCH_RB |
||||||
NPDSCH_RA |
||||||
NPDSCH_RB |
||||||
OCNG_RA Note 1 |
||||||
OCNG_RB Note 1 |
||||||
Note 3 |
dBm/ 15 kHz |
-98 |
||||
NPRS |
dB |
-Infinity |
-Infinity |
-Infinity |
||
dB |
-2 |
-Infinity |
-Infinity |
|||
Propagation Condition |
AWGN |
|||||
Antenna Configuration |
1×1 |
|||||
Timing offset to nCell 1 |
μs |
N/A |
1 |
-1 |
||
Note 1: 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. The OCNG pattern is chosen during the test according to the presence of a DL reference measurement channel. Note 2: The NPDSCH and NPDCCH reference measurement channels are used in the test only when a downlink transmission dedicated to the UE under test is required. Note 3: Interference from other cells and noise sources not specified in the test are assumed to be constant over subcarriers and time and shall be modelled as AWGN of appropriate power for to be fulfilled. |
Table 9.6.3.5-2: Cell Specific Test Parameters for Inter frequency RSTD Tests for T2 to T5
Parameter |
Unit |
nCell 1 |
nCell 2 |
nCell 3 |
|||||
T2 and T4 |
T3 and T5 |
T2 and T4 |
T3 and T5 |
T2 and T4 |
T3 and T5 |
||||
BWchannel |
kHz |
200 |
200 |
200 |
|||||
NB-IoT RF Channel Number |
1 |
1 |
1 |
||||||
OCNG patterns |
NOP.3 FDD |
N/A |
NOP.3 FDD |
NOP.3 FDD |
N/A |
||||
NPBCH_RA |
dB |
0 |
0 |
0 |
N/A |
||||
NPBCH_RB |
|||||||||
NPSS_RA |
|||||||||
NSSS_RA |
|||||||||
NPDCCH_RA |
|||||||||
NPDCCH_RB |
|||||||||
NPDSCH_RA |
|||||||||
NPDSCH_RB |
|||||||||
OCNG_RA Note 1 |
|||||||||
OCNG_RB Note 1 |
|||||||||
NPRS_RA |
dB |
-3 |
N/A |
N/A |
0 |
0 |
N/A |
||
Note 2 |
dBm/ 15 kHz |
-98 |
-95 |
-98 |
-95 |
-98 |
-95 |
||
NPRS |
dB |
-15 |
-Infinity |
-Infinity |
-15 |
-15 |
-Infinity |
||
NPRS Note 3 |
dB |
-15 |
-Infinity |
-Infinity |
-15 |
-15 |
-Infinity |
||
Io Note 3 |
dBm/ 180kHz |
-87.17 |
-87.20 |
-87.17 |
-87.15 |
-87.17 |
-87.15 |
||
NPRP Note 3 |
dBm/ 15 kHz |
-113 |
-Infinity |
-Infinity |
-110 |
-113 |
-Infinity |
||
NRSRP Note 3 |
dBm/ 15 kHz |
-110 |
-107 |
-113 |
-110 |
-113 |
-Infinity |
||
Note 3 |
dB |
-12 |
-12 |
-15 |
-15 |
-15 |
-Infinity |
||
Propagation Condition |
AWGN |
||||||||
Antenna Configuration |
1×1 |
||||||||
Timing offset to nCell 1 |
μs |
N/A |
1 |
-1 |
|||||
Note 1: OCNG shall be used such that active cells (all, except nCell 3 in T3) are fully allocated and a constant total transmitted power spectral density is achieved for all OFDM symbols other than those in the subframes with transmitted NPRS. Note 2: Interference from other cells and noise sources not specified in the test are assumed to be constant over subcarriers and time and shall be modelled as AWGN of appropriate power for to be fulfilled. Note 3: If NPRS_RA is not “N/A”, , NPRS , Io, NRSRP and NPRP levels have been derived from other parameters and are given for information purpose. If NPRS_RA is “N/A”, Io and NRSRP levels have been derived from other parameters and are given for information purpose. These are not settable test parameters. Interference conditions shall be applied to all PRS symbols of DL positioning subframes. |
The response time including test tolerance is 78.3 s. The response time is equal to the LPP time IE value plus the test tolerance.
The LPP time IE value is derived from the maximum allowed RSTD reporting delay plus T2 and T3 plus ΔT, where ΔT = 150 ms, giving a value of 77550 ms. This is rounded up to the next allowed LPP value of 78 seconds.
The maximum allowed RSTD reporting delay is 67.16 s. This time is measured starting from the beginning of time interval T4, to the moment when the UE starts to send preambles on the PRACH for sending the positioning measurement report message to nCell1. The maximum allowed RSTD reporting delay is equal to TRSTD _inter_NB-IoT-EC +TRandomAccess_NB-IoT-EC.
The RSTD measurement time TRSTD _inter_NB-IoT-EC in the test is derived according to section 9.6.3.3 where it is equal to . This gives the total RSTD measurement time of 11.52s for nCell 2 and nCell 3 with respect to the reference nCell 1
The random access to an already detected cell TRandomAccess_NB-IoT-EC can be expressed as: Tevaluate, NB_inter_NB-IoT-EC + TSI + TPRACH_NB-IoT,
Where:
Tevaluate, NB_inter_NB-IoT-EC = 12800 ms: see Table 4.6.2.4-1 in clause 4.6.2.4 in TS 36.133 [23].
TSI = 41560 ms and is the time required for receiving all the relevant system information as defined in TS 36.331 [22] for the target NB-IoT FDD cell.
TPRACH_NB-IoT = 1280 ms and is the additional delay caused by the random access procedure.
This gives TRandomAccess_NB-IoT-EC = 55.64 s for the random access delay to an already detected cell in the test case.
The test tolerances are defined in clauses C.1.3 and C4.
The rate of the correct events for each neighbour cell observed during repeated tests shall be at least 90% with a confidence level of 95%, where the reported RSTD measurement for each correct event shall be within the RSTD reporting range specified in Clause 9.1.10.3, i.e., between RSTD_0000 and RSTD_12711.