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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
Requirements for support of Assisted Galileo and Additional
Navigation Satellite Systems (A-GANSS)
Time Division Duplex (TDD)
(3GPP TS 25.173 version 15.0.0 Release 15)
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3GPP TS 25.173 version 15.0.0 Release 15 1 ETSI TS 125 173 V15.0.0 (2018-07)
Reference
RTS/TSGR-0425173vf00
Keywords
UMTS
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3GPP TS 25.173 version 15.0.0 Release 15 2 ETSI TS 125 173 V15.0.0 (2018-07)
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 25.173 version 15.0.0 Release 15 3 ETSI TS 125 173 V15.0.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 5
1 Scope . 6
2 References . 6
3 Definitions, symbols, abbreviations and test tolerances . 7
3.1 Definitions . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
3.4 Test tolerances . 8
4 General . 8
4.1 Introduction . 8
4.2 Measurement parameters . 8
4.2.1 UE-based A-GANSS measurement parameters . 8
4.2.2 UE-assisted A-GANSS measurement parameters . 9
4.3 Response time . 9
4.4 Time assistance . 9
4.4.1 Use of fine time assistance . 9
4.5 RRC states . 9
4.6 2D position error . 9
4.7 User equipment supporting multiple constellations . 10
4.8 User equipment supporting multiple signals . 10
5 A-GANSS minimum performance requirements . 10
5.1 Sensitivity . 10
5.1.1 Coarse time assistance . 11
5.1.1.1 Minimum requirements (coarse time assistance) . 11
5.1.2 Fine time assistance . 11
5.1.2.1 Minimum requirements (fine time assistance) . 12
5.2 Nominal accuracy . 12
5.2.1 Minimum requirements (nominal accuracy) . 13
5.3 Dynamic range . 13
5.3.1 Minimum requirements (dynamic range) . 14
5.4 Multi-path scenario. 14
5.4.1 Minimum requirements (multi-path scenario) . 14
5.5 Moving scenario and periodic update . 15
5.5.1 Minimum requirements (moving scenario and periodic update) . 16
Annex A (normative): Test cases . 17
A.1 Conformance tests . 17
A.2 Requirement classification for statistical testing . 17
Annex B (normative): Test conditions. 18
B.1 General . 18
B.1.1 Parameter values . 18
B.1.2 Time assistance . 18
B.1.3 GANSS reference time . 18
B.1.4 Reference and UE locations . 18
B.1.5 Satellite constellation and assistance data . 19
B.1.6 Atmospheric delay . 19
B.1.7 Sensors . 19
B.1.8 Information elements . 19
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3GPP TS 25.173 version 15.0.0 Release 15 4 ETSI TS 125 173 V15.0.0 (2018-07)
B.1.9 GNSS signals . 19
B.1.10 RESET UE POSITIONING STORED INFORMATION Message . 19
B.1.11 GNSS system time offsets . 20
Annex C (normative): Propagation conditions . 21
C.1 Static propagation conditions . 21
C.2 Multi-path case . 21
Annex D (normative): Measurement sequence chart . 22
D.1 General . 22
D.2 TTFF measurement sequence chart . 22
D.3 Periodic update measurement sequence chart . 23
Annex E (normative): Assistance data required for testing . 25
E.1 Introduction . 25
E.2 GPS assistance data . 25
E.3 GANSS assistance data . 25
Annex F (normative): Converting UE-assisted measurement reports into position estimates . 29
F.1 Introduction . 29
F.2 UE measurement reports . 29
F.3 Weighted Least Squares (WLS) position solution . 30
Annex G (informative):Change history . 33
History . 34
ETSI
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3GPP TS 25.173 version 15.0.0 Release 15 5 ETSI TS 125 173 V15.0.0 (2018-07)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
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3GPP TS 25.173 version 15.0.0 Release 15 6 ETSI TS 125 173 V15.0.0 (2018-07)
1 Scope
The present document establishes the minimum performance requirements for A-GANSS for TDD mode of UTRA for
the User Equipment (UE) that supports A-GANSS. It includes the minimum performance requirements for both
UE-based and UE-assisted A-GANSS. The minimum performance requirements also include combinations of A-GPS
and A-GANSS.
2 References
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] 3GPP TS 25.102: "User Equipment (UE) radio transmission and reception (TDD)".
[2] 3GPP TS 25.105: "Base Station (BS) radio transmission and reception (TDD)".
th
[3] IS-GPS-200, Revision D, "Navstar GPS Space Segment/Navigation User Interfaces", March 7 ,
2006.
[4] IS-GPS-705, "Navstar GPS Space Segment/User Segment L5 Interfaces", September 22, 2005.
[5] IS-GPS-800, "Navstar GPS Space Segment/User Segment L1C Interfaces", September 4, 2008.
[6] IS-QZSS, "Quasi Zenith Satellite System Navigation Service Interface Specifications for QZSS",
Ver.1.1, July 31, 2009.
rd
[7] "Galileo OS Signal in Space ICD (OS SIS ICD)", Draft 0, Galileo Joint Undertaking, May 23 ,
2006.
[8] "Global Navigation Satellite System GLONASS Interface Control Document", Version 5.1, 2008.
[9] "Specification for the Wide Area Augmentation System (WAAS) ", US Department of
Transportation, Federal Aviation Administration, DTFA01-96-C-00025, 2001.
[10] 3GPP TS 25.171: "Requirements for support of Assisted Global Positioning System (A-GPS)
Frequency Division Duplex (FDD)".
[11] 3GPP TS 34.171: "Terminal Conformance Specification, Assisted Global Positioning System (A-
GPS) (FDD)".
[12] 3GPP TS 34.172: "Terminal Conformance Specification, Assisted Galileo and Additional
Navigation Satellite Systems (A-GANSS) (FDD)".
[13] 3GPP TS 34.109: "Special conformance testing functions".
[14] 3GPP TS 25.331: "Radio Resource Control (RRC) protocol specification".
[15] 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".
[16] 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.
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3GPP TS 25.173 version 15.0.0 Release 15 7 ETSI TS 125 173 V15.0.0 (2018-07)
[17] S.K. Gupta, "Test and Evaluation Procedures for the GPS User Equipment", ION-GPS Red Book,
Volume 1, p. 119.
[18] 3GPP TS 25.225: "Physical layer; Measurements (TDD)".
[19] BeiDou Navigation Satellite System Signal In Space Interface Control Document Open Service
Signal B1I(Version 1.0), China Satellite Navigation Office, December 2012.
[20] 3GPP TS 37.571: "User Equipment (UE) conformance specification for UE positioning".
3 Definitions, symbols, abbreviations and test
tolerances
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TS 25.102 [1], 3GPP TS 25.105 [2]
and the following apply:
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.
3.2 Symbols
For the purposes of the present document, the following symbol applies:
B1I BeiDou B1I navigation signal with carrier frequency of 1561.098 MHz
c Speed of light.
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.
ρ Measured pseudo-range of satellite i of GNSS .
m
GNSS ,i
m
W Weighting Matrix.
1 Line of sight unit vector from the user to the satellite i of GNSS .
m
GNSS ,i
m
x State vector of user position and clock bias.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
A-GANSS Assisted-Galileo and Additional Navigation Satellite Systems
A-GNSS Assisted-GNSS
A-GPS Assisted-Global Positioning System
AWGN Additive White Gaussian Noise
BDS BeiDou Navigation Satellite System
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3GPP TS 25.173 version 15.0.0 Release 15 8 ETSI TS 125 173 V15.0.0 (2018-07)
C/A Coarse/Acquisition
DUT Device Under Test
ECEF Earth-Centered, Earth-Fixed
ECI Earth-Centered-Inertial
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
GSS GNSS System Simulator
HDOP Horizontal Dilution Of Precision
ICD Interface Control Document
IGSO Inclined Geosynchronous Satellite OrbitIS Interface Specification
LOS Line Of Sight
MEO Medium Earth Orbit
QZS Quasi-Zenith Satellite
QZSS Quasi-Zenith Satellite System
RF Radio Frequency
RRC Radio Resource Control
SBAS Space Based Augmentation System
SFN System Frame Number
SS System Simulator
SV Space Vehicle
TOD Time Of Day
TOW Time Of Week
TTFF Time To First Fix
UE User Equipment
UTRA Universal Terrestrial Radio Access
UTRAN Universal Terrestrial Radio Access Network
WLS Weighted Least Squares
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
3GPP TS 34.172 [12] 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 [15], subclause 6.5.
4 General
4.1 Introduction
The present document defines the minimum performance requirements for both UE-based and UE-assisted TDD
A-GANSS terminals. The minimum performance requirements also include combinations of A-GPS and A-GANSS.
4.2 Measurement parameters
4.2.1 UE-based A-GANSS measurement parameters
In case of UE-based A-GANSS, the measurement parameters are contained in the RRC UE POSITIONING POSITION
ESTIMATE INFO IE. The measurement parameter in case of UE-based A-GANSS is the horizontal position estimate
reported by the UE and expressed in latitude/longitude.
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4.2.2 UE-assisted A-GANSS measurement parameters
In case of UE-assisted A-GANSS, the measurement parameters are contained in the RRC UE POSITIONING GANSS
MEASURED RESULTS IE. The measurement parameters in case of UE-assisted A-GANSS are the UE GANSS code
measurements, as specified in 3GPP TS 25.225 [18]. The UE GANSS code measurements that may be combined with
UE GPS code phase measurements as specified in 3GPP TS 25.225 [18] are converted into a horizontal position
estimate using the procedure detailed in Annex F.
4.3 Response time
Max Response Time is defined as the time starting from the moment that the UE has received the final RRC
measurement control message containing reporting criteria different from "No Reporting" sent before the UE sends the
measurement report containing the position estimate or the GANSS and GPS measured result, and ending when the UE
starts sending the measurement report containing the position estimate or the GPS and GANSS measured result on the
Uu interface. The response times specified for all test cases are Time-to-First-Fix (TTFF) unless otherwise stated, i.e.
the UE shall not re-use any information on GANSS and GPS time, location or other aiding data that was previously
acquired or calculated and stored internally in the UE. A dedicated test message 'RESET UE POSITIONING STORED
INFORMATION' has been defined in TS 34.109 [13] clause 5.4 for the purpose of deleting this information and is
detailed in subclause B.1.10.
4.4 Time assistance
Time assistance is the provision of GANSS reference time to the UE from the network via RRC messages. Currently
two different GANSS time assistance methods can be provided by the network.
a) Coarse time assistance is always provided by the network and provides current GANSS time to the UE. The time
provided is within ±2 seconds of GANSS system time. It is signalled to the UE by means of the GANSS Day
and GANSS TOD fields in the GANSS Reference Time assistance data IE.
b) Fine time assistance is optionally provided by the network and adds the provision to the UE of the relationship
between the GANSS system time and the current UTRAN time. The accuracy of this relationship is ±10 μs of
the actual relationship. This addresses the case when the network can provide an improved GANSS time
accuracy. It is signalled to the UE by means of the SFN and UTRAN GANSS timing of cell frames fields in the
GANSS Reference Time assistance data IE.
The specific GANSS system time is identified through the GANSS Time ID field of the GANSS Reference Time IE. In
case where several GANSS are used in the tests, only one GANSS Time ID is used to determine the Time of Day. For
all the constellations, the GANSS Time Model assistance and UTC Model assistance shall be available at the system
simulator, as specified in Annex E.
The time of applicability of time assistance is the beginning of the System Frame of the message containing the GANSS
Reference time.
4.4.1 Use of fine time assistance
The use of fine time assistance to improve the GANSS performance of the UE is optional for the UE, even when fine
time assistance is signalled by the network. Thus, there are a set minimum performance requirements defined for all
UEs and additional minimum performance requirements that are valid for fine time assistance capable UEs only. These
requirements are specified in subclause 5.1.2.
4.5 RRC states
The minimum A-GANSS performance requirements are specified in clause 5 for different RRC states that include
Cell_DCH and Cell_FACH. Cell_PCH and URA_PCH states are for further study. The test and verification procedures
are separately defined in Annex B.
4.6 2D position error
The 2D position error is defined by the horizontal difference in meters between the ellipsoid point reported or calculated
from the UE Measurement Report and the actual position of the UE in the test case considered.
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4.7 User equipment supporting multiple constellations
Minimum performance requirements are defined for each global GANSS constellation (Galileo, Modernized GPS,
GLONASS and BDS). UEs supporting multiple global constellations shall meet the minimum performance
requirements for a combined scenario where each UE supported constellation is simulated.
NOTE: For test cases where signals from "GPS" and "Modernized GPS" are included, "GPS" and "Modernized
GPS" are considered as a single constellation, unless otherwise specified.
4.8 User equipment supporting multiple signals
For UEs supporting multiple signals, different minimum performance requirements may be associated with different
signals. The satellite simulator shall generate al
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