B.1 General
38.1713GPPNRRelease 17Requirements for Support of Assisted Global Navigation Satellite System (A-GNSS)TS
This annex specifies the additional parameters that are needed for the test cases specified in clauses 5 and 6 and applies to all tests unless otherwise stated.
B.1.1 Parameter values
Additionally, amongst all the listed parameters (see annex E), the following values for some important parameters are to be used in the LPP Request Location Information message.
Table B.1: Parameter values
|
Information element |
Value – TTFF tests (except nominal accuracy test) |
Value – TTFF tests (nominal accuracy test) |
Value – Periodic tests |
|
periodicalReporting |
Not present |
Not present |
Present |
|
> reportingAmount |
N/A |
N/A |
‘ra-Infinity’ (Infinite)(1) |
|
> reportingInterval |
N/A |
N/A |
‘ri2’ (2 seconds) |
|
qos |
|||
|
> horizontalAccuracy |
|||
|
>> accuracy (test cases in clause 5) |
19 (51.2 m) |
10 (15.9 m) |
19 (51.2 m) |
|
>> accuracy (test cases in clause 6) |
19 (51.2 m) |
6 (7.7 m) |
13 (24.5 m) |
|
> responseTime |
20 (seconds) |
20 (seconds) |
Not present |
|
NOTE 1: Infinite means during the complete test time. |
|||
In the Sensitivity test case with Fine Time Assistance, the following parameter values are used in the LPP Provide Assistance Data message.
Table B.2: Parameters for Fine Time Assistance test
|
Information element |
Value |
|---|---|
|
GNSS-ReferenceTimeForOneCell |
|
|
> networkTime |
|
|
>> frameDrift |
0 |
|
> referenceTimeUnc |
24 (11.11 s) |
B.1.2 Time assistance
For every Test Instance in each TTFF test case, the IE gnss-TimeOfDay shall have a random offset, relative to GNSS system time, within the error range of Coarse Time Assistance defined in the test case. This offset value shall have a uniform random distribution.
In addition, for every Fine Time Assistance Test Instance the IE networkTime shall have a random offset, relative to the true value of the relationship between the two time references, within the error range of Fine Time Assistance defined in the test case. This offset value shall have a uniform random distribution.
For the Moving Scenario and Periodic Update Test Case the IE gnss-TimeOfDay shall be set to the nominal value.
B.1.3 GNSS reference time
For every Test Instance in each TTFF test case, the GNSS reference time shall be advanced so that, at the time the fix is made, it is at least 2 minutes later than the previous fix.
B.1.4 Reference and UE locations
There is no limitation on the selection of the reference location, consistent with achieving the required HDOP for the Test Case. For each test instance the reference location shall change sufficiently such that the UE shall have to use the new assistance data. The uncertainty of the semi-major axis is 3 km. The uncertainty of the semi-minor axis is 3 km. The orientation of major axis is 0 degrees. The uncertainty of the altitude information is 500 m. The confidence factor is 68 %.
For every Test Instance in each TTFF test case, the UE location shall be randomly selected to be within 3 km of the Reference Location. The Altitude of the UE shall be randomly selected between 0 m to 500 m above WGS‑84 reference ellipsoid. These values shall have uniform random distributions.
For test cases which include satellites from regional systems, such as QZSS and SBAS, the reference location shall be selected within the defined coverage area of the systems.
B.1.5 Satellite constellation and assistance data
B.1.5.1 UE supports A-GPS L1 C/A only
In the case of test cases in clause 5 (UE supports A-GPS L1 C/A only), the GPS satellite constellation shall consist of 24 satellites. Almanac assistance data shall be available for all these 24 satellites. At least 9 of the satellites shall be visible to the UE (that is above 5 degrees elevation with respect to the UE). Other assistance data shall be available for 9 of these visible satellites. In each test, signals are generated for only a sub-set of these satellites for which other assistance data is available. The number of satellites in this sub-set is specified in the test. The satellites in this sub-set shall all be above 15 degrees elevation with respect to the UE. The HDOP for the test shall be calculated using this sub-set of satellites. The selection of satellites for this sub-set shall be selected consistent with achieving the required HDOP for the test.
B.1.5.2 UE supports other A-GNSSs
In the case of test cases in clause 6 (UE supports other GNSSs), the satellite constellation shall consist of 35 satellites for BDS (5 GEO, 27 MEO, 3 IGSO); 27 satellites for Galileo; 24 satellites for GLONASS; 27 satellites for GPS/Modernized GPS; 3 satellites for QZSS; 2 satellites for SBAS. Almanac assistance data shall be available for all these satellites. At least 7 of the satellites per BDS, Galileo, GLONASS, GPS/Modernized GPS constellation shall be visible to the UE (that is, above 15 degrees elevation with respect to the UE). At least 1 of the satellites for QZSS shall be within 15 degrees of zenith; and at least 1 of the satellites for SBAS shall be visible to the UE. For BDS with reference location in Asia, at least 1 of the visible satellites shall be a GEO (above 15 degrees elevation with respect to the UE). All other satellite specific assistance data shall be available for all visible satellites. In each test, signals are generated for only 6 satellites for single constellation and dual constellation and 7 satellites for triple constellation (or one additional satellite if SBAS is included). The HDOP for the test shall be calculated using these satellites. The simulated satellites for BDS, Galileo, GLONASS GPS/Modernized GPS shall be selected from the visible satellites for each constellation consistent with achieving the required HDOP for the test. For BDS with reference location in Asia, 1 of the simulated satellites shall be a GEO.
B.1.6 Atmospheric delays
Typical Ionospheric and Tropospheric delays shall be simulated, and the corresponding values inserted into the GNSS-Ionospheric Model IE.
B.1.7 E-UTRA or NR frequency and frequency error
In all test cases with E-UTRA frequency, the E-UTRA frequency used shall be the mid-range for the E-UTRA In all test cases other than Sensitivity in clause 5.1 with E-UTRA frequency, the E-UTRA frequency used shall be the mid-range for the E-UTRA operating band. The E-UTRA frequency with respect to the GNSS carrier frequency shall be offset by +0.025 PPM.
In all test cases other than Sensitivity in clause 5.1 with NR, the NR frequency used shall be as specified in TS 38.508-1 [20], clause 4.3.1. The NR frequency with respect to the GNSS carrier frequency shall be offset by + 0.025 PPM.
For verifying the sensitivity requirements in clause 5.1 with NR single carrier, the sensitivity tests shall be performed at least in each frequency band listed in Table B.1.7-1. The frequency bands listed in Table B.1.7-1 have been identified to be at high risk of generating interference in the GNSS bands due to mechanisms consisting of harmonics, cross band isolation, and receiver harmonic mixing. Other frequency bands may also impact GNSS sensitivity performance and thus be tested. For the frequency bands listed in Table B.1.7-1, the NR frequency and channel configuration shall be selected to ensure second order harmonics and other distortion will fall into the GNSS receiver bands as defined in clause B.1.13.2 for the particular GNSS. If the DUT does not support any of the frequency bands listed in Table B.1.7-1 the sensitivity tests in clause 5.1 can be performed in any frequency band supported by the DUT.
Table B.1.7-1: Minimum set of NR operating bands for verifying GNSS sensitivity
|
NR operating bands |
n14 |
B.1.8 Information elements
The information elements that are available to the UE in all the test cases are listed in annex E.
B.1.9 GNSS signals
The GNSS signal is defined at the A-GNSS antenna connector of the UE. For UE with integral antenna only, a reference antenna with a gain of 0 dBi is assumed.
B.1.10 RESET UE POSITIONING STORED INFORMATION Message
In order to ensure each Test Instance in each TTFF test is performed under TTFF conditions, a dedicated test message (RESET UE POSITIONING STORED INFORMATION) defined in TS 38.509 [9] clause 5.6 shall be used.
When the UE receives the ‘RESET UE POSITIONING STORED INFORMATION‘ message, with the IE UE POSITIONING TECHNOLOGY set to AGNSS it shall:
– discard any internally stored GNSS reference time, reference location, and any other aiding data obtained or derived during the previous test instance (e.g. expected ranges and Doppler);
– accept or request a new set of reference time or reference location or other required information, as in a TTFF condition;
– calculate the position or perform GNSS measurements using the ‘new’ reference time or reference location or other information.
B.1.11 GNSS system time offsets
If more than one GNSS is used in a test, the accuracy of the GNSS-GNSS Time Offsets used at the SS shall be better than 3 ns.
B.1.12 Sensors
The minimum performances shall be met without the use of any data coming from sensors that can aid the positioning.
B.1.13 EN-DC band combinations for testing A-GNSS sensitivity
B.1.13.1 EN-DC band combination groups
For the A-GNSS sensitivity requirements in EN-DC operation mode with uplink assigned to E-UTRA and NR frequency bands, the requirements in clause 6.1 can be verified by one EN-DC band combination in each of the applicable Frequency Group Combination specified in Table B.1.13.1-1. The A-GNSS sensitivity requirements for the remaining applicable EN-DC band combinations in each Frequency Group Combination are considered to have been verified by using the one EN-DC band combination in each Frequency Group Combination. The Frequency Groups are defined in Table B.1.13.1-2.
The applicable EN-DC band combinations for verifying A-GNSS sensitivity requirements in EN-DC operation mode are specified in clause B.1.13.2.
Table B.1.13.1-1: EN-DC band combination groups for verifying A-GNSS sensitivity requirements in EN-DC operation mode
|
Frequency Group Combination |
EN-DC Band Combinations |
|
Group VHF-VHF |
NA |
|
Group VHF-LB |
NA |
|
Group VHF-MLB |
NA |
|
Group VHF-MB |
NA |
|
Group VHF-HB |
NA |
|
Group VHF-UHB1 |
NA |
|
Group VHF-UHB2 |
NA |
|
Group LB-VHF |
NA |
|
Group LB-LB |
DC_5A_n12A DC_5A_n71A DC_8A_n20A DC_8A_n28A DC_12A_n5A DC_20A_n8A DC_20A_n28A DC_28A_n5A DC_28A_n8A DC_71A_n5A DC_20A_n83A |
|
Group LB-MLB |
DC_20A_n50A DC_20A_n51A DC_28A_n51A DC_28A_n50A |
|
Group LB-MB |
DC_5A_n2A DC_5A_n66A DC_8A_n1A DC_8A_n3A DC_8A_n34A DC_8A_n39A DC_12A_n2A DC_12A_n25A DC_12A_n66A DC_18A_n3A DC_20A_n1A DC_20A_n3A DC_26A_n25A DC_28A_n3A DC_71A_n66A DC_8A_n80A DC_20A_n80A |
|
Group LB-HB |
DC_5A_n7A DC_5A_n38A DC_5A_n40A DC_8A_n40A DC_8A_n41A DC_12A_n7A DC_12A_n38A DC_12A_n41A DC_20A_n7A DC_20A_n38A DC_20A_n41A DC_26A_n41A DC_28A_n7A DC_28A_n40A DC_28A_n41A DC_71A_n38A |
|
Group LB-UHB1 |
DC_5A_n48A DC_5A_n78A DC_8A_n77A DC_8A_n78A DC_12A_n78A DC_18A_n77A DC_18A_n78A DC_19A_n77A DC_19A_n78A DC_20A_n77A DC_20A_n78A DC_26A_n77A DC_26A_n78A DC_28A_n77A DC_28A_n78A DC_71A_n48A DC_71A_n78A |
|
Group LB-UHB2 |
DC_5A_n79A DC_8A_n79A DC_18A_n79A DC_19A_n79A DC_26A_n79A DC_28A_n79A |
|
Group MLB-VHF |
NA |
|
Group MLB-LB |
DC_11A_n28A |
|
Group MLB-MLB |
NA |
|
Group MLB-MB |
DC_11A_n3A |
|
Group MLB-HB |
NA |
|
Group MLB-UHB1 |
DC_11A_n77A DC_11A_n78A DC_21A_n77A DC_21A_n78A |
|
Group MLB-UHB2 |
DC_11A_n79A DC_21A_n79A |
|
Group MB-VHF |
NA |
|
Group MB-LB |
DC_1A_n5A DC_1A_n8A DC_1A_n20A DC_1A_n28A DC_1A_n71A DC_2A_n5A DC_2A_n12A DC_2A_n71A DC_3A_n5A DC_3A_n8A DC_3A_n20A DC_3A_n28A DC_3A_n71A DC_66A_n5A DC_66A_n12A DC_66A_n71A DC_3A_n82A |
|
Group MB-MLB |
DC_1A_n50A DC_1A_n51A DC_3A_n50A DC_3A_n51A |
|
Group MB-MB |
DC_1A_n3A DC_2A_n66A DC_3A_n1A DC_3A_n34A DC_66A_n2A DC_66A_n25A DC_1A_n80A DC_2A_n2A2 DC_66A_n66A2 DC_3A_n3A2 DC_3A_n84A |
|
Group MB-HB |
DC_1A_n7A DC_1A_n38A DC_1A_n40A DC_1A_n41A DC_2A_n7A DC_2A_n38A DC_2A_n41A DC_3A_n7A DC_3A_n38A DC_3A_n40A DC_3A_n41A DC_4A_n38A DC_4A_n41A DC_25A_n41A DC_39A_n40A DC_39A_n41A DC_66A_n7A DC_66A_n38A DC_66A_n41A |
|
Group MB-UHB1 |
DC_1A_n77A DC_1A_n78A DC_2A_n48A DC_2A_n78A DC_3A_n77A DC_3A_n78A DC_4A_n78A DC_39A_n78A DC_66A_n48A DC_66A_n78A |
|
Group MB-UHB2 |
DC_1A_n79A DC_3A_n79A DC_39A_n79A |
|
Group HB-VHF |
NA |
|
Group HB-LB |
DC_7A_n5A DC_7A_n8A DC_7A_n20A DC_7A_n28A DC_7A_n71A DC_30A_n5A DC_41A_n28A |
|
Group HB-MLB |
DC_7A_n51A |
|
Group HB-MB |
DC_7A_n1A DC_7A_n3A DC_7A_n66A DC_30A_n2A DC_30A_n66A DC_40A_n1A DC_41A_n3A DC_7A_n80A DC_38A_n3A |
|
Group HB-HB |
DC_7A_n40A DC_40A_n41A DC_7A_n7A2 DC_41A_n41A |
|
Group HB-UHB1 A(NOTE 1): |
DC_40A_n77A DC_40A_n78A |
|
B(NOTE 2): |
DC_7A_n78A DC_38A_n78A DC_41A_n78A |
|
C(NOTE 3): |
DC_7A_n77A DC_41A_n77A |
|
Group HB-UHB2 |
DC_40A_n79A DC_41A_n79A |
|
Group UHB1-VHF |
NA |
|
Group UHB1-LB |
NA |
|
Group UHB1-MLB |
NA |
|
Group UHB1-MB |
NA |
|
Group UHB1-HB |
NA |
|
Group UHB1-UHB1 |
NA |
|
Group UHB1-UHB2 |
NA |
|
Group UHB2-VHF |
NA |
|
Group UHB2-LB |
NA |
|
Group UHB2-MLB |
NA |
|
Group UHB2-MB |
NA |
|
Group UHB2-HB |
NA |
|
Group UHB2-UHB1 |
NA |
|
Group UHB2-UHB2 |
NA |
|
NOTE 1: This sub-group generates second order intermodulation products. NOTE 2: This sub-group generates third order intermodulation products. NOTE 3: This sub-group generates second and third order intermodulation products. |
|
Table B.1.13.1-2: Definition of Frequency Groups
|
Frequency Group |
Frequency Range (MHz) |
|
VHF |
400.0 – 458.0 |
|
LB |
662.0 – 916.0 |
|
MLB |
1426.0 – 1518.0 |
|
MB |
1626.0 – 2025.0 |
|
HB |
2300.0 – 2690.0 |
|
UHB1 |
3300.0 – 4201.0 |
|
UHB2 |
4400.0 – 5000.0 |
B.1.13.2 Applicable EN-DC band combinations for verifying A-GNSS sensitivity requirements
The A-GNSS sensitivity requirements in clause 6.1 when in EN-DC operation mode shall be verified for EN-DC band combinations that can generate second or third order intermodulation products falling into the following GNSS receiver bands for the particular GNSS (where supported by the UE):
– GPS L1 C/A: 1574.3970 – 1576.4430 MHz
– Galileo E1 / GPS L1C: 1573.3740 – 1577.4660 MHz
– GLONASS G1: 1597.5515 – 1605.8860 MHz
– BDS B1I: 1559.0520 – 1563.1440 MHz
For each frequency group combination in Table B.1.13.2-1 only one EN-DC band combination needs to be tested for the supported GNSS.
Table B.1.13.2-1: EN-DC band combinations for verifying A-GNSS sensitivity requirements
|
Frequency Group Combination |
EN-DC band combinations |
||
|
GPS L1 / Galileo E1 |
GLONASS G1 |
BDS B1 |
|
|
Group LB-LB |
DC_20A_n28A DC_28A_n5A DC_20A_n83A |
DC_8A_n28A DC_20A_n28A DC_28A_n8A DC_20A_n83A |
DC_5A_n12A DC_12A_n5A DC_20A_n28A DC_28A_n5A DC_20A_n83A |
|
Group LB-MLB |
NA |
NA |
NA |
|
Group LB-MB |
NA |
NA |
NA |
|
Group LB-HB |
DC_5A_n40A DC_28A_n40A |
DC_8A_n41A DC_28A_n40A |
DC_5A_n40A DC_28A_n40A |
|
Group LB-UHB1 |
DC_8A_n77A DC_8A_n78A DC_20A_n77A DC_20A_n78A |
DC_5A_n78A DC_8A_n77A DC_8A_n78A DC_20A_n77A DC_20A_n78A DC_26A_n77A DC_26A_n78A |
DC_8A_n77A DC_8A_n78A |
|
Group LB-UHB2 |
NA |
NA |
NA |
|
Group MLB-LB |
NA |
NA |
NA |
|
Group MLB-MLB |
NA |
NA |
NA |
|
Group MLB-MB |
NA |
NA |
NA |
|
Group MLB-HB |
NA |
NA |
NA |
|
Group MLB-UHB1 |
NA |
NA |
NA |
|
Group MLB-UHB2 |
DC_11A_n79A DC_21A_n79A |
DC_11A_n79A DC_21A_n79A |
DC_11A_n79A DC_21A_n79A |
|
Group MB-LB |
NA |
NA |
NA |
|
Group MB-MLB |
NA |
NA |
NA |
|
Group MB-MB |
DC_1A_n3A DC_2A_n66A DC_3A_n1A DC_66A_n2A DC_66A_n25A DC_1A_n80A DC_3A_n84A |
DC_1A_n3A DC_2A_n66A DC_3A_n1A DC_66A_n2A DC_66A_n25A DC_1A_n80A DC_3A_n84A |
DC_1A_n3A DC_2A_n66A DC_3A_n1A DC_66A_n2A DC_66A_n25A DC_1A_n80A DC_3A_n84A |
|
Group MB-HB |
DC_1A_n40A |
DC_1A_n7A |
DC_1A_n7A |
|
Group MB-UHB1 |
DC_1A_n77A DC_1A_n78A DC_2A_n78A DC_3A_n77A DC_3A_n78A DC_4A_n78A DC_39A_n78A DC_66A_n78A |
DC_1A_n77A DC_1A_n78A DC_2A_n78A DC_3A_n77A DC_3A_n79A DC_4A_n78A DC_39A_n78A DC_66A_n78A |
DC_1A_n77A DC_1A_n78A DC_2A_n78A DC_3A_n77A DC_3A_n79A DC_4A_n78A DC_39A_n78A DC_66A_n78A |
|
Group MB-UHB2 |
DC_3A_n79A |
NA |
DC_3A_n79A |
|
Group HB-LB |
NA |
DC_7A_n8A |
NA |
|
Group HB-MLB |
NA |
NA |
NA |
|
Group HB-MB |
DC_40A_n1A |
DC_40A_n1A |
DC_40A_n1A |
|
Group HB-HB |
NA |
NA |
NA |
|
Group HB-UHB1 A: |
DC_40A_n77A |
DC_40A_n77A |
DC_40A_n77A |
|
B: |
DC_7A_n78A DC_38A_n78A DC_41A_n78A |
DC_7A_n78A DC_38A_n78A DC_41A_n78A |
DC_7A_n78A DC_38A_n78A DC_41A_n78A |
|
C: |
DC_7A_n77A DC_41A_n77A |
DC_7A_n77A DC_41A_n77A |
DC_7A_n77A DC_41A_n77A |
|
Group HB-UHB2 |
NA |
NA |
NA |
B.1.13.3 Test frequencies for EN-DC band combinations
For verifying the sensitivity requirements in clause 6.1 in EN-DC operation mode, the E-UTRA and NR frequency and channel configuration shall be selected to ensure the intermodulation products fall into the GNSS receiver bands as defined in clause B.1.13.2 for the particular GNSS.
Annex C (normative):
Propagation conditions