3 Definitions, symbols and abbreviations
38.1713GPPNRRelease 17Requirements for Support of Assisted Global Navigation Satellite System (A-GNSS)TS
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [1] and the following apply:
EN-DC: E-UTRA-NR Dual Connectivity as defined in TS 37.340 [2].
en-gNB: as defined in TS 37.340 [2].
gNB: as defined in in TS 38.300 [17].
Horizontal Dilution Of Precision (HDOP): measure of position determination accuracy that is a function of the geometrical layout of the satellites used for the fix, relative to the receiver antenna
NE-DC: NR-E-UTRA Dual Connectivity as defined in TS 37.340 [2].
ng-eNB: as defined in TS 38.300 [17].
NR-DC: NR-NR Dual Connectivity as defined in TS 37.340 [2].
3.2 Symbols
For the purposes of the present document, the following symbols apply:
B1I BeiDou B1I navigation signal with carrier frequency of 1561.098 MHz.
B1C BeiDou B1C navigation signal with carrier frequency of 1575.420 MHz.
B2a BeiDou B2a navigation signal with carrier frequency of 1176.450 MHz.
B3I BeiDou B3I navigation signal with carrier frequency of 1268.520 MHz.
E1 Galileo E1 navigation signal with carrier frequency of 1575.420 MHz.
E5 Galileo E5 navigation signal with carrier frequency of 1191.795 MHz.
E6 Galileo E6 navigation signal with carrier frequency of 1278.750 MHz.
G1 GLONASS navigation signal in the L1 sub-bands with carrier frequencies 1602 MHz ± k × 562.5 kHz.
G2 GLONASS navigation signal in the L2 sub-bands with carrier frequencies 1246 MHz ± k × 437.5 kHz.
k GLONASS channel number, k = -7…13.
L1 C/A GPS or QZSS L1 navigation signal carrying the Coarse/Acquisition code with carrier frequency of 1575.420 MHz.
L1C GPS or QZSS L1 Civil navigation signal with carrier frequency of 1575.420 MHz.
L2C GPS or QZSS L2 Civil navigation signal with carrier frequency of 1227.600 MHz.
L5 GPS or QZSS L5 navigation signal with carrier frequency of 1176.450 MHz.
G Geometry Matrix.
Measured pseudo-range of satellite i of GNSSm.
W Weighting Matrix.
Line of sight unit vector from the user to the satellite i of GNSSm.
State vector of user position and clock bias.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
5GS 5G System
A-GNSS Assisted Global Navigation Satellite System
A-GPS Assisted – Global Positioning System
AWGN Additive White Gaussian Noise
BDS BeiDou Navigation Satellite System
C/A Coarse/Acquisition
DC Dual Connectivity
DUT Device Under Test
ECEF Earth Centred, Earth Fixed
E-UTRA Evolved UMTS Terrestrial Radio Access
E-UTRAN Evolved UMTS Terrestrial Radio Access Network
EN-DC E-UTRA-NR Dual Connectivity
FDD Frequency Division Duplex
GEO Geostationary Earth Orbit
GLONASS GLObal’naya NAvigatsionnaya Sputnikovaya Sistema (Engl.: Global Navigation Satellite System)
GNSS Global Navigation Satellite System
GPS Global Positioning System
HDOP Horizontal Dilution Of Precision
ICD Interface Control Document
IGSO Inclined Geosynchronous Satellite Orbit
IS Interface Specification
LMF Location Management Function
LOS Line Of Sight
LPP LTE Positioning Protocol
MEO Medium Earth Orbit
NE-DC NR-E-UTRA Dual Connectivity
NR NR Radio Access
NR-DC NR-NR Dual Connectivity
QZSS Quasi-Zenith Satellite System
RRC Radio Resource Control
SBAS Space Based Augmentation System
SFN System Frame Number
SS System Simulator
SV Space Vehicle
TDD Time Division Duplex
TOW Time Of Week
TTFF Time To First Fix
UE User Equipment
WLS Weighted Least Square
WGS‑84 World Geodetic System 1984
3.4 Test tolerances
The requirements given in the present document make no allowance for measurement uncertainty. The test specification TS 37.571-1 [19] defines test tolerances. These test tolerances are individually calculated for each test. The test tolerances are then added to the limits in the present document to create test limits. The measurement results are compared against the test limits as defined by the shared risk principle.
Shared Risk is defined in ETR 273-1-2 [7], clause 6.5.