Content for TS 29.173 Word version: 18.0.0

3.1 Definitions 3.2 Abbreviations 4.1 Introduction 4.2 Architecture Overview 4.3 Functional Requirements of SLh Interface
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1 Scope p. 6

The present document describes the Diameter-based SLh interface between the GMLC and the HSS defined for the Control Plane LCS in EPC.

LCS procedures over the SLh interface are defined in the TS 23.271.

This specification defines the Diameter application for the GMLC-HSS, SLh reference point. The interactions between the HSS and the GMLC are specified, including the signalling flows. As LCS procedures over the Diameter-based SLh interface are identical to the MAP-based Lh interface, the descriptions of the Lh MAP operations defined in the TS 29.002 are mapped into the descriptions of the SLh Diameter commands.

2 References p. 6

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 23.271: "Functional stage 2 description of Location Services (LCS)".

[3]

TS 29.002: "Mobile Application Part (MAP) specification".

[4]

TS 29.228: "IP multimedia (IM) Subsystem Cx Interface; Signalling flows and Message Elements".

[5] Void.

[6]

TS 33.210: "3G security; Network Domain Security (NDS); IP network layer security".

[7]

RFC 4960: "Stream Control Transport Protocol".

[8]

TS 29.229: "Cx and Dx Interfaces based on the Diameter protocol; protocol details".

[9]

TS 29.329: "Sh Interface based on the Diameter protocol; protocol details".

[10]

TS 23.003: "Numbering, addressing and identification ".

[11]

TS 23.012: "Location Management Procedures".

[12]

TS 29.272: "Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol".

[13]

RFC 2234: "Augmented BNF for syntax specifications".

[14] Void

[15]

ITU-T Recommendation E.164: "The international public telecommunication numbering plan".

[16]

TS 29.273: "Evolved Packet System (EPS); 3GPP EPS AAA interfaces".

[17]

RFC 6733: "Diameter Base Protocol".

3 Definitions, symbols and abbreviations p. 7

3.1 Definitions p. 7

For the purposes of the present document, the terms and definitions given in TR 21.905, TS 23.271 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

3.2 Abbreviations p. 7

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

ABNF

Augmented Backus-Naur form

AVP

Attribute Value Pair

H-GMLC

Home-Gateway Mobile Location Centre

IANA

Internet Assigned Numbers Authority

PMD

Pseudonym mediation device functionality

PPR

Privacy Profile Register

R-GMLC

Requesting-Gateway Mobile Location Centre

RFC

Request For Comments

V-GMLC

Visited-Gateway Mobile Location Centre

4 General Description p. 7

4.1 Introduction |R14| p. 7

The SLh reference point between the GMLC and the HSS is defined in the TS 23.271.

This document describes the Diameter-based SLh interface related procedures, message parameters and protocol specifications.

4.2 Architecture Overview |R14| p. 7

The architecture for support of Location Services in GSM, UMTS and EPS has been defined in TS 23.271 and the relevant network elements and interfaces are shown in the Figure 4.2-1.

Reproduction of 3GPP TS 29.173, Fig. 4.2-1: Overview of the LCS Functional Architecture

Figure 4.2-1: Overview of the LCS Functional Architecture

In this architecture, the SLh interface is defined between the Gateway Mobile Location Center (GMLC) and the Home Subscriber Server (HSS) to allow the GMLC to request routing information from the HLR or HSS.

4.3 Functional Requirements of SLh Interface |R14| p. 8

The requirements for SLh interface are defined in TS 23.271.

The SLh interface is used by the GMLC to request routing information from the HSS i.e. the address of the H-GMLC, and/or the address of the visited MSC/MSC server, SGSN, 3GPP AAA server or MME for a particular target UE whose location has been requested.