4 LCS O&M Architecture

12.713GPPLocation Services (LCS)Location services managementTS

The LCS O&M reference model proposed for location services in GSM networks is shown in Figure 1.

The interface between the OSS and the SMLC and the interface between the OSS and the GMLC are Q interfaces. This is due to compatibility with OSS interfaces applied to other GSM network elements which are defined using the Q interface (see e.g. GSM12.00 [2], GSM12.01 [3], GSM12.20 [4], GSM12.22 [6], etc.).

The succeeding discussion will be based on Figure 1. (No inference should be drawn from Figure 1 about the physical configuration of an interface.)

OSS

A

BSC

Ls

Um

Type A

LMU

Type B

Abis

LMU

Abis

SMLC

HLR

MSC/VLR

MS

GMLC

Lh

Other PLMN

Lg

Lg

Le

LCS client

External

O&M Interface

O&M Interface

Lb

BTS

(LMU Type B)

GMLC

Figure 1: Location Services O&M Reference Model