ETSI TS 129 172 V16.1.0 (2022-03)

Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Location Services (LCS); Evolved Packet Core (EPC) LCS Protocol (ELP) between the Gateway Mobile Location Centre (GMLC) and the Mobile Management Entity (MME); SLg interface (3GPP TS 29.172 version 16.1.0 Release 16)

RTS/TSGC-0429172vg10

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 4 - MAP/CAMEL/GTP/BCH/SS/TrFO/IMS/GUP/WLAN (formely CN4)
• Current Stage: 12 - Completion
• Completion Date: 30-Mar-2022

Standards Content (Sample)

ETSI TS 129 172 V16.1.0 (2022-03)






TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
LTE;
Location Services (LCS);
Evolved Packet Core (EPC) LCS Protocol (ELP)
between the Gateway Mobile Location Centre (GMLC)
and the Mobile Management Entity (MME);
SLg interface
(3GPP TS 29.172 version 16.1.0 Release 16)

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3GPP TS 29.172 version 16.1.0 Release 16 1 ETSI TS 129 172 V16.1.0 (2022-03)

Reference
RTS/TSGC-0429172vg10
Keywords
GSM,LTE,UMTS
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ETSI

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3GPP TS 29.172 version 16.1.0 Release 16 2 ETSI TS 129 172 V16.1.0 (2022-03)
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Legal Notice
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ETSI

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3GPP TS 29.172 version 16.1.0 Release 16 3 ETSI TS 129 172 V16.1.0 (2022-03)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 7
2 References . 7
3 Definitions, symbols and abbreviations . 8
3.1 Definitions . 8
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Functional Overview . 9
4.1 General . 9
5 ELP Message Transport . 10
5.1 General . 10
5.2 Use of Diameter base protocol . 10
5.3 Securing Diameter Messages . 10
5.4 Accounting functionality . 10
5.5 Use of sessions . 10
5.6 Transport protocol . 11
5.7 Routing considerations . 11
5.8 Advertising Application Support . 11
6 ELP Procedures . 11
6.1 General . 11
6.2 Provide Subscriber Location . 12
6.2.1 General . 12
6.2.2 Successful Operation . 12
6.2.3 Unsuccessful Operation . 19
6.3 Subscriber Location Report . 19
6.3.1 General . 19
6.3.2 Successful Operation . 19
6.3.3 Unsuccessful Operation . 23
7 ELP Messages and Message Formats . 23
7.1 General . 23
7.2 Message Formats . 24
7.3 ELP Messages . 24
7.3.1 Provide-Location-Request (PLR) Command . 24
7.3.2 Provide-Location-Answer (PLA) Command . 25
7.3.3 Location-Report-Request (LRR) Command . 25
7.3.4 Location-Report-Answer (LRA) Command . 26
7.4 Information Elements . 27
7.4.1 General . 27
7.4.2 SLg-Location-Type . 30
7.4.3 LCS-EPS-Client-Name . 30
7.4.4 LCS-Requestor-Name . 31
7.4.5 LCS-Priority . 31
7.4.6 LCS-QoS . 31
7.4.7 Horizontal-Accuracy . 31
7.4.8 Vertical-Accuracy . 31
7.4.9 Vertical-Requested. 31
7.4.10 Velocity-Requested . 32
7.4.11 Response-Time . 32
7.4.12 Supported-GAD-Shapes . 32
ETSI

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3GPP TS 29.172 version 16.1.0 Release 16 4 ETSI TS 129 172 V16.1.0 (2022-03)
7.4.13 LCS-Codeword . 32
7.4.14 LCS-Privacy-Check . 32
7.4.15 Accuracy-Fulfilment-Indicator . 33
7.4.16 Age-Of-Location-Estimate . 33
7.4.17 Velocity-Estimate . 33
7.4.18 EUTRAN-Positioning-Data . 33
7.4.19 ECGI . 33
7.4.20 Location-Event . 33
7.4.21 Pseudonym-Indicator . 33
7.4.22 LCS-Service-Type-ID . 34
7.4.23 LCS-Privacy-Check-Non-Session . 34
7.4.24 LCS-Privacy-Check-Session. 34
7.4.25 Feature-List-ID . 34
7.4.26 Feature-List . 34
7.4.27 LCS-QoS-Class . 34
7.4.28 Serving-Node . 34
7.4.29 GERAN-Positioning-Info . 35
7.4.30 GERAN-Positioning-Data . 35
7.4.31 GERAN-GANSS-Positioning-Data . 35
7.4.32 UTRAN-Positioning-Info . 35
7.4.33 UTRAN-Positioning-Data . 35
7.4.34 UTRAN-GANSS-Positioning-Data . 35
7.4.35 LRR-Flags. 35
7.4.36 Deferred-Location-Type . 36
7.4.37 LCS-Reference-Number . 36
7.4.38 Area-Event-Info . 36
7.4.39 Area-Definition . 37
7.4.40 Area . 37
7.4.41 Area-Type . 37
7.4.42 Area-Identification . 38
7.4.43 Occurrence-Info . 38
7.4.44 Interval-Time . 38
7.4.45 Periodic-LDR-Info . 38
7.4.46 Reporting-Amount . 38
7.4.47 Reporting-Interval . 38
7.4.48 Reporting-PLMN-List . 38
7.4.49 PLMN-ID-List . 39
7.4.50 Periodic-Location-Support-Indicator . 39
7.4.51 Prioritized-List-Indicator . 39
7.4.52 PLR-Flags . 39
7.4.53 PLA-Flags . 40
7.4.54 Deferred-MT-LR-Data . 40
7.4.55 Termination-Cause. 41
7.4.56 LRA-Flags . 41
7.4.57 ESMLC-Cell-Info . 41
7.4.58 Cell-Portion-ID . 42
7.4.59 1xRTT-RCID . 42
7.4.60 Delayed-Location-Reporting-Data. 42
7.4.61 Civic-Address . 42
7.4.62 Barometric-Pressure. 42
7.4.63 UTRAN-Additional-Positioning-Data . 42
7.4.64 Motion-Event-Info . 42
7.4.65 Linear-Distance . 43
7.4.66 Maximum-Interval . 43
7.4.67 Sampling-Interval . 43
7.4.68 Reporting-Duration . 43
7.4.69 Reporting-Location-Requirements . 43
7.4.70 Additional-Area . 43
7.5 Result-Code AVP and Experimental-Result AVP Values . 44
7.5.1 General . 44
7.5.2 Success . 44
7.5.3 Permanent Failures . 44
ETSI

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3GPP TS 29.172 version 16.1.0 Release 16 5 ETSI TS 129 172 V16.1.0 (2022-03)
7.5.3.1 DIAMETER_ERROR_USER_UNKNOWN (5001) . 44
7.5.3.2 DIAMETER_ERROR_UNAUTHORIZED_REQUESTING_NETWORK (5490) . 44
7.5.4 Transient Failures . 44
7.5.4.1 DIAMETER_ERROR_UNREACHABLE_USER (4221). 44
7.5.4.2 DIAMETER_ERROR_SUSPENDED_USER (4222) . 44
7.5.4.3 DIAMETER_ERROR_DETACHED_USER (4223) . 44
7.5.4.4 DIAMETER_ERROR_POSITIONING_DENIED (4224) . 45
7.5.4.5 DIAMETER_ERROR_POSITIONING_FAILED (4225) . 45
7.5.4.6 DIAMETER_ERROR_UNKNOWN_UNREACHABLE LCS_CLIENT (4226) . 45
Annex A (informative): Change history . 46
History . 47

ETSI

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3GPP TS 29.172 version 16.1.0 Release 16 6 ETSI TS 129 172 V16.1.0 (2022-03)
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 29.172 version 16.1.0 Release 16 7 ETSI TS 129 172 V16.1.0 (2022-03)
1 Scope
The present document specifies the procedures and information coding for the EPC LCS Protocol (ELP) that is needed
to support the location services in E-UTRAN, UTRAN and GERAN. The ELP message set is applicable to the SLg
interface between the MME and the GMLC and the Lgd interface between the SGSN and the GMLC. ELP is developed
in accordance to the general principles stated in 3GPP TS 23.271 [2].
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 TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 23.271: "Functional stage 2 description of Location Services (LCS)".
[3] 3GPP TS 23.032: "Universal Geographical Area Description (GAD)".
[4] Void.
[5] IETF RFC 2234: "Augmented BNF for syntax specifications".
[6] 3GPP TS 23.003: "Numbering, addressing and identification".
[7] 3GPP TS 29.171: "LCS Application Protocol (LCS-AP) between the MME and E-SMLC".
[8] 3GPP TS 29.274: "Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control
plane (GTPv2-C)".
[9] Void
[10] 3GPP TS 32.299: "Charging management; Diameter charging applications".
[11] 3GPP TS 29.272: "Evolved Packet System; MME and SGSN Related Interfaces Based on
Diameter Protocol".
[12] 3GPP TS 29.329: "Sh Interface based on the Diameter protocol".
[13] 3GPP TS 33.210: "3G Security; Network Domain Security; IP
...