ETSI TS 103 246-4 V1.3.1 (2020-10)

Satellite Earth Stations and Systems (SES); GNSS based location systems; Part 4: Requirements for location data exchange protocols

RTS/SES-00454

General Information

• Status: Not Published
• Technical Committee: SES SCN - Satellite Communications and Navigation
• Current Stage: 12 - Completion
• Due Date: 10-Sep-2020
• Completion Date: 01-Oct-2020
• Mandate: M/496

Standards Content (Sample)

ETSI TS 103 246-4 V1.3.1 (2020-10)






TECHNICAL SPECIFICATION
Satellite Earth Stations and Systems (SES);
GNSS based location systems;
Part 4: Requirements for location data exchange protocols

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2 ETSI TS 103 246-4 V1.3.1 (2020-10)



Reference
RTS/SES-00454
Keywords
GNSS, location, MSS, navigation, performance,
receiver, satellite, system, terminal
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3 ETSI TS 103 246-4 V1.3.1 (2020-10)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 6
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 9
3.3 Abbreviations . 9
4 Data Exchange Requirements . 11
4.1 Context . 11
4.2 Protocol Choice and Compatibility . 12
4.2.1 LSEP (MLP) . 12
4.2.2 LSIP (LPPe) . 12
4.2.2.1 General . 12
4.2.2.2 LSIP Data Exchange Requirements . 13
4.2.2.3 Additional LSIP IEs for GBLS using differential GNSS positioning methods . 16
4.2.3 EPDD (RTCM 104) . 17
4.2.4 LSEP/MLP and LSIP/LPPe Terminology . 17
5 LSEP Requirements . 17
5.1 LSEP Services and Procedures . 17
5.2 Extension of MLP for LSEP. 18
5.3 LSEP Data Exchange Message Definition . 19
6 LSIP Requirements . 19
6.1 LSIP Services and Procedures . 19
6.2 Extension of LPPe/LPP for LSIP . 20
6.3 LSIP Data Exchange Message Definition . 20
6.3.1 General . 20
6.3.2 IE Extensions of LPP/LPPe for LSIP . 20
6.3.2.1 Message Extensions . 20
6.3.2.2 LPPe data type imports . 21
6.3.3 LSIP Extension Messages . 22
6.3.3.1 Request Assistance Data . 22
6.3.3.2 Provide Assistance Data . 22
6.3.3.3 Request Location Information . 22
6.3.3.4 Provide Location Information . 22
7 LSEP Element Definitions . 23
7.1 Overview . 23
7.2 LSEP Child Elements . 23
7.2.1 Identity elements . 23
7.2.2 Location elements . 23
7.2.3 Quality of Position elements . 25
7.3 LSEP Sub-Child Elements . 26
7.3.1 accel . 26
7.3.2 accel_conf_lev . 26
7.3.3 accel_unc . 26
7.3.4 accel_req . 26
7.3.5 auth_flag . 27
7.3.6 auth_req . 27
ETSI

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4 ETSI TS 103 246-4 V1.3.1 (2020-10)
7.3.7 conf_class . 27
7.3.8 emidata_req. 27
7.3.9 h_acc . 28
7.3.10 h_acc_not_met . 28
7.3.11 h_conf_lev . 28
7.3.12 h_int_alert . 28
7.3.13 head_conf_lev . 29
7.3.14 head_req . 29
7.3.15 head_unc . 29
7.3.16 LSEP-msids . 29
7.3.17 v_acc . 29
7.3.18 v_acc_not_met . 30
7.3.19 v_conf_lev . 30
7.3.20 v_unc . 30
7.3.21 v_req . 30
7.3.22 vel_acc . 31
7.3.23 vel_acc_not_met . 31
7.3.24 vel_conf_lev . 31
7.3.25 vel_unc . 31
7.3.26 vel_req . 31
8 LSIP Information Elements . 32
8.1 LSIP Common Positioning IEs . 32
8.1.1 General . 32
8.1.2 LSIP-CommonIEsRequestLocationInformation . 32
8.1.3 LSIP-CommonIEsProvideLocationInformation . 34
8.2 LSIP Common Low-Level IEs . 36
8.2.1 General . 36
8.2.2 LSIP-ConfidenceLevels . 36
8.2.3 LSIP-ErrorMeasurements . 36
8.2.4 LSIP-QosIndicators . 36
8.3 Specific Positioning Method IEs . 37
8.3.1 General . 37
8.3.2 GNSS Positioning . 37
8.3.2.1 LSIP-GNSS-RequestLocationInformation . 37
8.3.2.2 LSIP-GNSS-ProvideLocationInformation . 38
8.3.3 Odometer positioning . 38
8.3.3.1 LSIP-Odometer-RequestAssistanceData . 38
8.3.3.2 LSIP-Odometer-ProvideAssistanceData . 39
8.3.3.3 LSIP-Odometer-RequestLocationInformation . 39
8.3.3.4 LSIP-Odometer-ProvideLocationInformation . 39
8.3.4 Beam Forming Network Positioning . 40
8.3.4.1 LSIP-BFN-RequestLocationInformation . 40
8.3.4.2 LSIP-BFN-ProvideLocationInformation. 40
8.3.4.3 LSIP-JammerSignal . 40
8.3.5 Mapping Positioning . 41
9 D-GNSS information elements . 41
9.1 General . 41
9.2 Case of conventional D-GNSS . 41
9.3 Case of RTK . 42
9.4 NRTK . 42
9.5 PPP . 45
Annex A (informative): Rationale for LSEP/MLP and LSIP/LPPe . 46
A.1 Basis for LSEP/MLP . 46
A.2 Basis for LSIP/LPPe . 46
A.3 LSIP Implementation Cases . 46
A.4 LSIP Procedure examples for GBLS Interface 10 . 48
A.4.1 "Mobile-centric" Assistance data provisioning . 48
ETSI

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5 ETSI TS 103 246-4 V1.3.1 (2020-10)
A.4.2 "Network-centric" Location Information provisioning . 49
Annex B (informative): Bibliography . 50
History . 51

ETSI

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6 ETSI TS 103 246-4 V1.3.1 (2020-10)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Satellite Earth Stations and
Systems (SES).
The present document is part 4 of a multi-part deliverable covering the GNSS based location systems, as identified
below:
Part 1: "Functional requirements";
Part 2: "Reference Architecture";
Part 3: "Performance requirements";
Part 4: "Requirements for location data exchange protocols";
Part 5: "Performance Test Specification".
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.
Introduction
The increasing expansion of location-based applications aims to satisfy more and more complex and diversified user
requirements: this is highlighted for example by the widespread adoption of multi-functional smart-phones or by the
ever wider adoption of tracking devices (e.g. in transport), etc. This requirement for new and innovative location-based
applications is generating a requirement for increasingly complex location systems.
ETSI

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7 ETSI TS 103 246-4 V1.3.1 (2020-10)
The wide spectrum of location-based applications identified in ETSI TR 103 183 [i.1] calls for a new and broader
concept for location systems, taking into account solutions in which GNSS technologies are complemented with other
technologies to improve robustness and performance. The notion of GNSS-based location systems is introduced and
defined in the present document.
Additional clauses and information related to the implementation in GNSS-based location systems of the various
differential GNSS technologies, namely D-GNSS, RTK and PPP are also included in order to facilitate the use of this
multi part deliverable by manufacturers and service providers.
ETSI

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8 ETSI TS 103 246-4 V1.3.1 (2020-10)
1 Scope
The present document defines the requirements for data elements that may need to be exchanged within the GBLS and
externally to applications using the GBLS.
The present document also specifies data exchange models for these data elements which may form the basis of
protocols (or for modification of protocols) and which may be used for the exchange of location-related data within
complex GBLS, as well as between the GBLS and external applications.
The present document defines the procedures and messages associated with these data exchange models.
The GBLS data exchange models are defined to be independent of their underlying transport mechanisms. Nevertheless,
on certain GBLS interfaces, transport protocols are recommended.
ETSI TS 103 246 parts 1 [1], 2 [2], 3 [3] and 5 [i.8] address integrated GNSS based location systems (GBLS) that
combine Global Navigation Satellite Systems (GNSS), with other navigation technologies, as well as with
telecommunication networks in order to deliver location-based services to users. As a consequence the present
document is not applicable to GNSS only receivers.
ETSI TS 103 246 parts 1 [1], 2 [2], 3 [3] and 5 [i.8] propose a list of functional and performance requirements and
related test procedures. For each performance requirement, different classes are defined allowing the benchmark of
different GBLS addressing the same applications.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 103 246-1: "Satellite Earth Stations and Systems (SES); GNSS based location systems;
Part 1: Functional requirements".
[2] ETSI TS 103 246-2: "Satellite Earth Stations and Systems (SES); GNSS based location systems;
Part 2: Reference Architecture".
[3] ETSI TS 103 246-3: "Satellite Earth Stations and Systems (SES); GNSS based location systems;
Part 3: Performance requirements".
[4] OMA-TS-MLP-V3.5: "Mobile Location Protocol".
[5] OMA-TS-LPPe-V2.0: "LPP Extensions Specification".
[6] ETSI TS 136 355: "LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); LTE Positioning
Protocol (LPP) (3GPP TS 36.355)".
[7] RTCM 10402.3: "Recommended Standards for Differential GNSS (Global Navigation Satellite
Systems) Service".
[8] RTCM 10403.2: " Differential GNSS (Global Navigation Satellite Systems) Services".
ETSI

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9 ETSI TS 103 246-4 V1.3.1 (2020-10)
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI TR 103 183: "Satellite Earth Stations and Systems (SES); Global Navigation Satellite
Systems (GNSS) based applications and standardisation needs".
[i.2] OMA-TS-ULP-V3: "User Plane Location Protocol".
[i.3] OMA-AD-LOCSIP-V1: "Location in SIP/IP core Architecture".
[i.4] ETSI ES 201 915 (all parts): "Open Service Access (OSA); Application Programming Interface
(API)".
[i.5] 3GPP2 C.S0022-B: "Position Determination Service for cdma2000 Spread Spectrum Systems".
[i.6] ETSI TS 125 331: "Universal Mobile Telecommunications System (UMTS); Radio Resource
Control (RRC); Protocol specification (3GPP TS 25.331)".
[i.7] ETSI TS 144 031: "Digital cellular telecommunications system (Phase 2+); Location Services
(LCS); Mobile Station (MS) - Serving Mobile Location Centre (SMLC) Radio Resource LCS
Protocol (RRLP) (3GPP TS 44.031)".
[i.8] ETSI TS 103 246-5: "Satellite Earth Stations and Systems (SES); GNSS based location systems;
Part 5: Performance Test Specification".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in ETSI TS 103 246-1 [1] and ETSI TS 103 246-2 [2] apply.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
rd
3GPP 3 Generation Partnership Project
API Application Programming Interface
ASN Abstract Syntax Notation
BFN Beam Forming Network
CL Confidence Level
CNR Carrier-to-Noise Ratio
D-GNSS Differential GNSS
DoA Direction of Arrival
DTD Document Type Definition
ECID Enhanced Cell ID
EMI ElectroMagnetic Interference
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10 ETSI TS 103 246-4 V1.3.1 (2020-10)
EOTD Enhanced Observed Time Difference
EPDD External Protocol for Differential Data
EPDU Extension Protocol Data Unit
E-SMLC Enhanced Serving Mobile Location Centre
FFS For Further Study
FKP Flächen Korrekctur Parameter (German)
GBLS GNSS Based Location System
GGTO
...