Mobile Positioning in GSM Networks


Published: Jun 2005
Pages: 
130
Single User: 
$195.00
Company Wide: 
$1,995.00
Team License: 
$865.00
No attribute is more distinguishing and valuable to mobile network operators and their constituents (customers, suppliers, and investors) than customer location information. Location-based Services (LBS) are predicted to finally take off beginning in late 2005 to early 2006. Many people do not understand the underlying technologies necessary to position mobile cellular phones in GSM networks. This publication provides the user with an easy to understand, presentation that includes detailed notes (Notes View of PPT document) to facilitate understanding of mobile positioning systems for GSM. The publication includes illustrations of standard GSM architectures including the GMLC, SMLC, and LMU and discussion of positioning functionalities.

Target Audience: 
  • Anyone desiring more illustrations and description of GSM positioning architectures and functions
  • Anyone tasked with understanding and/or teaching GSM positioning
Table of Contents: 

Introduction to Positioning

Quality of Service
LCS Procedures
General Network Procedures
GSM Positioning Methods
3G Positioning Methods

LCS Architecture

Logical Reference Model
Generic LCS Logical Architecture
GSM LCS Reference Model
GERAN/UTRAN Architecture
Functional LCS Architecture in GERAN
UTRAN Positioning Architecture
External LCS Client
GatewayMobile Location Center (GMLC)
Serving Mobile Location Center (SMLC)
Location Measurement Unit (LMU)
Service Control Function (gsmSCF)

Positioning Methods Overview

UE-based vs. UE-assisted
Cell ID and TA/RTT
Time of Arrival Methods
Angle of Arrival Methods
Hybrid Methods: E-OTD
Global Positioning System
Summary and Evaluation of Methods

Security and Privacy

Security
Privacy
MS Privacy Options
Privacy Override Indicator (POI)
LCS Subscription Data
LCS Client Data
Special Cases: Emergency Services
Special Cases: Lawful Intercept

LCS Network Infrastructure

GSM LCS Reference Model

Network Element Function

GMLC
SMLC
LMU
gsmSCF
HLR
MSC/VLR
BSC
BTS
LMU Type A
LMU Type B

Network Element Interfaces

Le
Lc
Lg
Lh
Ls
Lp
Lb
A
Abis
Um

Cell ID

MS/UE States
CGI, LAI, SAI, URA
Differences in Cell ID GSM vs. UMTS
UE in Soft-handover (WCDMA)

Cell ID Procedures

TA Positioning Procedures for NSS SMLC
TA Positioning for BSS SMLC

E-OTD/OTDOA

Analysis of DL-TDOA
OTD, RTD, and GTD
Hyperbolic Type Location
Idle Period Downlink (IPDL)
E-OTD/OTDOA Procedures

Positioning of BSS SMLC
Positioning of NSS SMLC
Assistance Data Delivery from BSS SMLC
Assistance Data Delivery from NSS SMLC
A-GPS

Introduction to GPS – DGPS
GPS Navigational Signal GPS vs. A-GPS
Assistance Data in GPS
A-GPS Procedure
UE-based/UE-assisted A-GPS
Other Satellite-based Positioning Systems
Emergency Services

GSM NA – FCC E-911
Phase II
J-STD-036-A
GSM CGALIES

Categories: 
Applications (general)
Infrastructure (general)
Location Based Services (LBS)

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