Universal Mobile Telecommunications System (UMTS); LTE; User Equipment (UE) conformance specification for UE positioning; Part 4: Test suites (3GPP TS 37.571-4 version 15.4.0 Release 15)

RTS/TSGR-0537571-4vf40

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ETSI TS 137 571-4 V15.4.0 (2020-04) - Universal Mobile Telecommunications System (UMTS); LTE; User Equipment (UE) conformance specification for UE positioning; Part 4: Test suites (3GPP TS 37.571-4 version 15.4.0 Release 15)
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ETSI TS 137 571-4 V15.4.0 (2020-04)
TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
User Equipment (UE) conformance specification
for UE positioning;
Part 4: Test suites
(3GPP TS 37.571-4 version 15.4.0 Release 15)
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3GPP TS 37.571-4 version 15.4.0 Release 15 1 ETSI TS 137 571-4 V15.4.0 (2020-04)
Reference
RTS/TSGR-0537571-4vf40
Keywords
LTE,UMTS
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3GPP TS 37.571-4 version 15.4.0 Release 15 2 ETSI TS 137 571-4 V15.4.0 (2020-04)
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Legal Notice

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The present document may refer to technical specifications or reports using their 3GPP identities. These shall be

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ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 3 ETSI TS 137 571-4 V15.4.0 (2020-04)
Contents

Intellectual Property Rights ................................................................................................................................ 2

Legal Notice ....................................................................................................................................................... 2

Modal verbs terminology .................................................................................................................................... 2

Foreword ............................................................................................................................................................. 5

Introduction ........................................................................................................................................................ 5

1 Scope ........................................................................................................................................................ 6

2 References ................................................................................................................................................ 6

3 Definitions, symbols and abbreviations ................................................................................................... 7

3.1 Definitions .......................................................................................................................................................... 7

3.2 Symbols .............................................................................................................................................................. 8

3.3 Abbreviations ..................................................................................................................................................... 8

4 A-GPS system architecture and test model .............................................................................................. 8

4.1 ATS and module structure .................................................................................................................................. 8

4.2 Upper tester ........................................................................................................................................................ 8

4.3 SV PCO .............................................................................................................................................................. 8

4.4 A-GPS Primitives ............................................................................................................................................... 8

4.5 Specific test suite operation for A-GPS testing .................................................................................................. 8

5 A-GNSS and LTE positioning system architecture and test models ........................................................ 8

5.1 Test system architecture ..................................................................................................................................... 8

5.1.1 General system architecture .......................................................................................................................... 8

5.1.2 Component architecture ................................................................................................................................ 8

5.1.2.1 Interfaces ................................................................................................................................................. 9

5.2 Test model ........................................................................................................................................................ 10

5.2.1 LTE GNSS test model ................................................................................................................................ 10

5.2.2 UTRA A-GNSS test model ......................................................................................................................... 11

5.3 ASP specifications ............................................................................................................................................ 12

5.4 LTE OTDOA test model .................................................................................................................................. 13

5.5 LTE ECID test model ....................................................................................................................................... 13

6 LTE indoor positioning system architecture and test models ................................................................ 14

6.1 Test system architecture ................................................................................................................................... 14

6.1.1 General system architecture ........................................................................................................................ 14

6.1.2 Component architecture .............................................................................................................................. 14

6.1.2.1 Interfaces ............................................................................................................................................... 14

6.2 Test model ........................................................................................................................................................ 15

6.2.1 LTE indoor positioning test model ............................................................................................................. 15

6A LTE test models requiring GNSS support .............................................................................................. 16

6B NG-RAN NR positioning system architecture and test models ............................................................. 16

6B.1 Test system architecture ................................................................................................................................... 16

6B.1.1 General system architecture ........................................................................................................................ 16

6B.1.2 Component architecture .............................................................................................................................. 16

6B.2 Test models ...................................................................................................................................................... 17

6B.2.1 NR GNSS positioning test model ............................................................................................................... 17

6B.2.2 NR indoor positioning test model ............................................................................................................... 18

6B.2.3 NR OTDOA (LTE) positioning test model ................................................................................................. 18

7 Upper Tester Interface ............................................................................................................................ 19

7.1 MMI for A-GPS ............................................................................................................................................... 19

7.2 MMI for A-GNSS, LTE and NR positioning ................................................................................................... 19

8 IXIT Proforma ........................................................................................................................................ 20

8.1 A-GPS test suite parameters declarations ......................................................................................................... 20

ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 4 ETSI TS 137 571-4 V15.4.0 (2020-04)

8.2 A-GNSS, LTE and NR positioning test suite parameters declarations ............................................................ 20

9 Other SS Requirements with TTCN-3 impact........................................................................................ 20

9.1 Codec Requirements......................................................................................................................................... 20

Annex A (normative): Test Suites ....................................................................................................... 21

A.1 A-GPS test suite ..................................................................................................................................... 21

A.1.1 Version of specifications .................................................................................................................................. 21

A.1.2 AGPS ATS ....................................................................................................................................................... 21

A.1.3 The TTCN Machine Processable form (TTCN.MP) ........................................................................................ 22

A.2 A-GNSS and LTE positioning test suite ................................................................................................ 22

A.2.1 Baseline of specifications ................................................................................................................................. 22

A.2.2 E-UTRA LTE positioning Test Cases .............................................................................................................. 22

A.2.3 UTRA A-GNSS Test Cases.............................................................................................................................. 23

Annex B (informative): ASN.1 modules ............................................................................................... 24

B.1 A-GPS ASN.1 module ........................................................................................................................... 24

B.2 A-GNSS ASN.1 modules ....................................................................................................................... 24

B.3 LPP ASN.1 ............................................................................................................................................. 24

Annex C (informative): E-UTRA System Simulator Extension ASP Definitions in TTCN-3 ......... 25

C.1 EUTRA_POS_ASP_TypeDefs .............................................................................................................. 25

C.1.1 System_Configuration_PosExt ......................................................................................................................... 25

C.1.2 Cell_Configuration_PosExt .............................................................................................................................. 25

C.1.2.1 Cell_Configuration_Common_PosExt ....................................................................................................... 25

C.1.2.2 Downlink_Physical_Layer_Configuration_PosExt .................................................................................... 26

C.1.3 System_Interface_PosExt ................................................................................................................................. 26

C.2 References to TTCN-3 ........................................................................................................................... 27

Annex D (informative): Positioning System Simulator ASP Definitions in TTCN-3 ....................... 28

D.1 PosSystem_ASP_TypeDefs ................................................................................................................... 28

D.1.1 PosSystem_Load_Scenario .............................................................................................................................. 28

D.1.2 PosSystem_Retrieve_Data ............................................................................................................................... 29

D.1.2.1 SatSystem_Retrieve_UTRAN_Data ........................................................................................................... 29

D.1.2.2 PosSystem_Retrieve_LPP_Data ................................................................................................................. 30

D.1.2.3 PosSystem_Retrieve_Data_Common ......................................................................................................... 31

D.1.3 PosSystem_PowerControl ................................................................................................................................ 31

D.1.4 System_Interface .............................................................................................................................................. 32

D.2 CommonDefs ......................................................................................................................................... 33

D.3 References to TTCN-3 ........................................................................................................................... 33

Annex E (informative): Change history ............................................................................................... 34

History .............................................................................................................................................................. 39

ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 5 ETSI TS 137 571-4 V15.4.0 (2020-04)
Foreword

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.

Introduction

The present document is part 4 of a multi-part conformance test specification. The specification contains a TTCN

design frame work and the detailed test specifications in TTCN for the UE:
- A-GPS at the UTRA Uu interface in TTCN-2;
- A-GNSS at the UTRA Uu interface in TTCN-3;
- LTE positioning at the LTE-Uu interface in TTCN-3.
- NR positioning at the NR-Uu interface in TTCN-3.
The present document is part 4 of a multi-parts TS:

- 3GPP TS 37.571-1: User Equipment (UE) conformance specification for UE positioning; Part 1: Terminal

conformance.

- 3GPP TS 37.571-2: User Equipment (UE) conformance specification for UE positioning; Part 2: Protocol

conformance.

- 3GPP TS 37.571-3: User Equipment (UE) conformance specification for UE positioning; Part 3: Implementation

Conformance Statement (ICS).

- 3GPP TS 37.571-4: User Equipment (UE) conformance specification for UE positioning; Part 4: Test

suites.

- 3GPP TS 37.571-5: User Equipment (UE) conformance specification for UE positioning; Part 5: Test scenarios

and assistance data.
ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 6 ETSI TS 137 571-4 V15.4.0 (2020-04)
1 Scope

The present document specifies the protocol and signalling conformance testing in TTCN for the UE:

- A-GPS at the UTRA Uu interface;
- LTE positioning at the LTE-Uu interface;
- A-GNSS at the UTRA Uu interface.
- NR positioning at the NR-Uu interface.

The following TTCN test specification and design considerations can be found in the present document:

- Test system architecture;
- Test models and ASP definitions;
- Test methods and usage of communication ports definitions;
- Test configurations;
- Design principles and assumptions;
- TTCN styles and conventions;
- Partial PIXIT proforma;
- Test suites in TTCN-2 and TTCN-3;

- The Test Suites designed and implemented in the present document are based on the test specifications in prose

in 3GPP TS 37.571-2 [3];

- The applicability of the individual test cases is specified in the test ICS proforma specification in

3GPP TS 37.571-3 [4].
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 unless the context in which the reference is made suggests a different Release is

relevant (information on the applicable release in a particular context can be found in e.g. test case title,

description or applicability, message description or content).
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".

[2] 3GPP TS 37.571-1: " User Equipment (UE) conformance specification for UE positioning; Part 1:

Conformance test specification".

[3] 3GPP TS 37.571-2: " User Equipment (UE) conformance specification for UE positioning; Part 2:

Protocol conformance".

[4] 3GPP TS 37.571-3: " User Equipment (UE) conformance specification for UE positioning; Part 3:

Implementation Conformance Statement (ICS)".
ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 7 ETSI TS 137 571-4 V15.4.0 (2020-04)

[5] 3GPP TS 37.571-5: " User Equipment (UE) conformance specification for UE positioning; Part 5:

Test scenarios and assistance data".

[6] 3GPP TS 36.523-3: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet

Core (EPC); User Equipment (UE) conformance specification; Part 3: Test suites".

[7] 3GPP TS 36.508: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet

Core (EPC); Common test environments for User Equipment (UE) conformance testing".

[8] 3GPP TS 34.123-3: "User Equipment (UE) conformance specification; Part 3: Abstract test suite

(ATS)".

[9] 3GPP TS 34.108: "Common test environments for User Equipment (UE); Conformance testing".

[10] 3GPP TS 36.355: "Evolved Universal Terrestrial Radio Access (E-UTRA); LTE Positioning

Protocol (LPP)".

[11] 3GPP TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS);

Stage 3".
[12] 3GPP TS 25.331: "Radio Resource Control (RRC); Protocol specification".

[13] 3GPP TS 24.080: "Mobile radio interface layer 3 supplementary services specification; Formats

and coding".
[14] 3GPP TS 29.002: "Mobile Application Part (MAP) specification".

[15] ITU-T Recommendation X.880: "Information technology - Remote Operations: Concepts, model

and notation".

[16] ITU-T Recommendation Q.773: "Transaction capabilities formats and encoding".

[17] ETSI ES 201 873-1: "Methods for Testing and Specification (MTS); The Testing and Test Control

Notation version 3; Part 1: TTCN-3 Core Language".

[18] 3GPP TS 34.109: "Terminal logical test interface; Special conformance testing functions".

[19] 3GPP TS 23.038: "Alphabets and language-specific information".

[20] ETSI TR 101 666 (V1.0.0): "Information technology; Open Systems Interconnection Conformance

testing methodology and framework; The Tree and Tabular Combined Notation (TTCN)
(Ed. 2++)".

[21] 3GPP TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".

[22] 3GPP TS 23.032: "Universal Geographical Area Description (GAD)".

[23] 3GPP TS 36.211: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and

modulation".

[24] 3GPP TS 38.523-3: "5GS; User Equipment (UE) conformance specification; Part 3: Protocol Test

Suites".
3 Definitions, symbols and abbreviations
3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] apply.

ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 8 ETSI TS 137 571-4 V15.4.0 (2020-04)
3.2 Symbols

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] apply.

3.3 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply:

ASP Abstract Service Primitive
4 A-GPS system architecture and test model

A-GPS signalling conformance tests are specified in TTCN-2. The system architecture and the test model are based on

3GPP TS 34.123-3 [8].
4.1 ATS and module structure
Refer to 3GPP TS 34.123-3 [8], clause 5.
4.2 Upper tester
Refer to 3GPP TS 34.123-3 [8], clause 7.3.5.1.
4.3 SV PCO
Refer to 3GPP TS 34.123-3 [8], clause 7.3.5.2.
4.4 A-GPS Primitives
Refer to 3GPP TS 34.123-3[8], clause 7.3.5.3.
4.5 Specific test suite operation for A-GPS testing
Refer to 3GPP TS 34.123-3 [8], clause 8.7.7.
5 A-GNSS and LTE positioning system architecture
and test models
5.1 Test system architecture
5.1.1 General system architecture
Refer to 3GPP TS 36.523-3 [6], clause 4.1.1.
5.1.2 Component architecture

Each access technology (RAT) is hosted by a separate TTCN-3 parallel component (PTC):

- E-UTRA PTC;
ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 9 ETSI TS 137 571-4 V15.4.0 (2020-04)
- UTRA PTC.

The PTCs are controlled by the TTCN-3 positioning master test component (POS MTC) which:

- Is an extension of the MTC as defined in 3GPP TS 36.523-3 [6], clause 4.1.2.
- Controls the SS Positioning Simulator.

Figure 5.1.2-1 shows this component architecture for an E-UTRA and UTRA scenario.

AT/MMI commands
Upper Tester
POS MTC
TTCN-3
Synchronisation
Upper tester control
POS port control
Coordination
messages
UTRA
EUTRA
PTC PTC
A-GNSS
LTE positioning
TTCN
TTCN
E-UTRA UTRA Ports
POS Port E-UTRA
Control Ports UE
Ports
UTRA
Control
Ports
Positioning
System Simulator
Simulator
Radio Interface
Satellite Signal
Figure 5.1.2-1: Component architecture for an E-UTRA and UTRA scenario
The PTCs are allocated according to the following principles:
- For LTE positioning tests cases, the E-UTRA PTC is created.
- For LTE positioning CS fallback test cases, E-UTRA and UTRA PTCs are created.
- For UTRA A-GNSS test cases, the UTRA PTC is created.
5.1.2.1 Interfaces
A number of interfaces are taken into consideration.
POS MTC - PTC:
Common synchronisation of PTCs.
Positioning simulator command/data coordination messages.
Upper tester primitives.
ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 10 ETSI TS 137 571-4 V15.4.0 (2020-04)

POS MTC - System Interface:
Upper tester primitives.
POS MTC- Positioning Simulator:
Positioning simulator command and data primitives.
PTC - PTC:
Primitives containing information for IRAT handover.
PTC - System Interface:
Primitives containing peer-to-peer message.
Configuration primitives.
5.2 Test model

In order to perform the LTE positioning and A-GNSS tests, the Positioning Simulator shall have two basic functional

unites:
- Satellite simulator generating and broadcasting satellite signals.

- Assistance data source storing the data associated with the pre-defined GPS and GNSS test scenarios (see 3GPP TS

37.571-5 [5]).
This specification supports the following GNSS: GPS, Galileo, GLONASS and BDS.
5.2.1 LTE GNSS test model
TTCN CODE
POS MTC E-UTRA MTC
DRB SRB2-SRB0 Config/Control
POS Port
RR RRC/C/NANA SS
EmEmuullaattoorr
Integrity
PDCP
Ciphering
RLRLCC
[A[AM/M/UUMM//TTM]M]
Positioning
Simulator
MAMACC
PHPHYY
Figure 5.2.1-1: E-UTRA Test model for LTE positioning GNSS testing
ETSI
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3GPP TS 37.571-4 version 15.4.0 Release 15 11 ETSI TS 137 571-4 V15.4.0 (2020-04)

The LTE positioning test model consists of an SS E-UTRAN protocol stack and a positioning simulator. The SS E-

UTRA emulation part is the same as the model defined in 3GPP TS 36.523-3 [6].

The UE is configured in normal mode. On UE side Ciphering/Integrity (PDCP and NAS) is enabled. The tests are

performed on C-Plane.
The ASPs at POS Port are used to:
- Load a pre-defined test scenario into the positioning simulator.

- Start or stop generating and broadcasting satellite signals from the positioning simulator.

- Retrieve the
...

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