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TS 29.171CT4
Location Services Application Protocol (LCS-AP)
between MME and E-SMLC – SLs interface

use "3GPP‑Page" to get the Word version
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for a better overview, the Table of Contents (ToC) is reproduced
V15.4.0 (PDF)  2019/12  68 p.
V14.3.0  2019/09  58 p.
V13.3.0  2017/06  57 p.
V12.3.0  2017/06  54 p.
V11.4.0  2015/12  53 p.
V10.5.0  2015/12  53 p.
V9.4.0  2011/06  53 p.

Rapporteur:  Mr. De Gregorio, JesusEricsson LM

This TS specifies the procedures and information coding for LCS Application Protocol (LCS‑AP) that is needed to support the location services in E‑UTRAN. The LCS‑AP message set is applicable to the SLs interface between the E‑SMLC and the MME. The LTE Positioning Protocols (LPP and LPPa) can be carried in LCS‑AP messages which are transparent to the MME.
3GPP 29.171 - SLs reference point: Protocol Layering for LCS-AP

full Table of Contents for  TS 29.171  Word version:   15.4.0

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1  ScopeWord-p. 7
2  References
3  Definitions and abbreviationsWord-p. 8
4  Functional Overview
5  LCS-AP Message TransportWord-p. 9
6  LCS-AP Procedures
7  LCS-AP Messages and Message FormatsWord-p. 18
7.1  General
7.2  Message Formats
7.3  LCS-AP Messages
7.4  Information ElementsWord-p. 22
7.5  Message and information element abstract syntax
7.6  Handling of unknown, unforeseen and erroneous protocol data
8  LCS-AP Timers
A  Change historyWord-p. 64

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