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Content for  TS 38.171  Word version:  16.3.0

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1  ScopeWord‑p. 7

The present document establishes the minimum requirements for both UE based and UE assisted FDD or TDD A-GNSS terminals which have NG-RAN access via gNB (in SA NR, NR-DC or NE-DC NR operation mode, TS 37.340) or via ng-eNB (in EN-DC operation mode, TS 37.340) and which are supporting A-GNSS in 5GS via LPP [3] between UE and LMF as described in TS 38.305.
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2  ReferencesWord‑p. 7

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 37.340: "Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity", Stage 2.
[3]
TS 36.355: "Evolved Universal Terrestrial Radio Access (E-UTRA); LTE Positioning Protocol (LPP)".
[4]
TS 38.215: "NR; Physical layer; Measurements".
[5]
ETSI TR 102 273-1-2: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the corresponding measurement uncertainties; Part 1: Uncertainties in the measurement of mobile radio equipment characteristics; Sub-part 2: Examples and annexes".
[6]
IS-GPS-200, Revision D, Navstar GPS Space Segment/Navigation User Interfaces, March 7th, 2006.
[7]
P. Axelrad, R.G. Brown, "GPS Navigation Algorithms", in Chapter 9 of "Global Positioning System: Theory and Applications", Volume 1, B.W. Parkinson, J.J. Spilker (Ed.), Am. Inst. of Aeronautics and Astronautics Inc., 1996.
[8]
S.K. Gupta, "Test and Evaluation Procedures for the GPS User Equipment", ION-GPS Red Book, Volume 1, p. 119.
[9]
TS 38.509: "5GS; Special conformance testing functions for User Equipment (UE)".
[10]
IS-GPS-705, Navstar GPS Space Segment/User Segment L5 Interfaces, September 22, 2005.
[11]
IS-GPS-800, Navstar GPS Space Segment/User Segment L1C Interfaces, September 4, 2008.
[12]
IS-QZSS, Quasi Zenith Satellite System Navigation Service Interface Specifications for QZSS, Ver.1.1, July 31, 2009.
[13]
Galileo OS Signal in Space ICD (OS SIS ICD), Issue 1.2, February 2014, European Union.
[14]
Global Navigation Satellite System GLONASS Interface Control Document, Version 5.1, 2008.
[15]
Specification for the Wide Area Augmentation System (WAAS), US Department of Transportation, Federal Aviation Administration, DTFA01-96-C-00025, 2001.
[16]
BDS-SIS-ICD-B1I-3.0: "BeiDou Navigation Satellite System Signal In Space Interface Control Document Open Service Signal B1I (Version 3.0)", China Satellite Navigation Office, December 2019.
[17]
TS 38.300: "NR; Overall description; Stage-2".
[18]
TS 38.305: "NG Radio Access Network (NG-RAN); Stage 2 functional specification of User Equipment (UE) positioning in NG-RAN".
[19]
TS 37.571-1: " User Equipment (UE) conformance specification for UE positioning; Part 1: Terminal conformance".
[20]
TS 38.508-1: "5GS; User Equipment (UE) conformance specification; Part 1: Common test environment".
[21]
BDS-SIS-ICD-B1C-1.0: "BeiDou Navigation Satellite System Signal In Space Interface Control Document Open Service Signal B1C (Version 1.0)", December, 2017.
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3  Definitions, symbols and abbreviationsWord‑p. 8

3.1  DefinitionsWord‑p. 8

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply:
EN-DC:
E-UTRA-NR Dual Connectivity as defined in TS 37.340.
en-gNB:
as defined in TS 37.340.
gNB:
as defined in in TS 38.300.
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.
ng-eNB:
as defined in TS 38.300.
NR-DC:
NR-NR Dual Connectivity as defined in TS 37.340.

3.2  SymbolsWord‑p. 8

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.
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.
ρGNSSm,i
Measured pseudo-range of satellite i of GNSSm.
W
Weighting Matrix.
1GNSSm,i
Line of sight unit vector from the user to the satellite i of GNSSm.
x
State vector of user position and clock bias.
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3.3  AbbreviationsWord‑p. 9

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
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3.4  Test tolerancesWord‑p. 9

The requirements given in the present document make no allowance for measurement uncertainty. The test specification TS 37.571-1 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 [5], clause 6.5.
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