1 04/22/02

Mobile PositioningE-911 & LBS

Bikash SahaEUS HUB Manager (MPS/LBS)

972.583.5865bikash.saha@ericsson.com

2 04/22/02

Agenda• Drivers• E-911 Mandate• MPS for GSM

* Positioning Technologies* Architecture

• Ericsson Solution– Roadmap– Design and Verification Procedure

• Why Ericsson MPS

3 04/22/02

Drivers

4 04/22/02

USA’s FCC Regulation: E-911 Ph2

Wireless Internet

5 04/22/02

E-911 Mandate

6 04/22/02

Phase II Accuracy Standards For Handset-Based Solutions:

* 50 meters for 67 percent of Calls

* 150 meters for 95 percent of calls

For Network-Based Solutions:* 100 meters for 67 percent of calls

* 300 meters for 95 percent of calls

7 04/22/02

Recent FCC Actions Request for Relief

* Over the past few years, carriers have been asserting the need for relief from E-911 rules

* FCC set forth standard for carriers seeking relief:

>Plan that is specific, focused, and limited in scope

>As close as possible to full compliance

>Clear path to full compliance

8 04/22/02

Recent FCC Actions Approval of Compliance Plans

* 10/5/01: FCC approved, with conditions and modifications, revised implementation plans of five nationwide wireless carrier

>Nextel, Sprint, Verizon and GSM portion of AT&T Wireless and Cingular networks

>Sixth nationwide carrier VoiceStream had their plan approved year before

>Plans contain specific schedules and benchmark

>Quarterly reports required to monitor compliance

>Move to enforcement mode

9 04/22/02

Points of Concern Delay in reaching interim benchmarks towards full compliance. Some uncertainty about manufacturers producing necessary equipment in timely fashion. ILEC issues. Funding for PSAPs. Still a long road before end-to-end systems are operational throughout the country.

10 04/22/02

Going forward The tragedies of September 11 give a new sense of urgency to the rollout of wireless E911. More than ever, mobiles phone have become indispensable tools for calling for help and for delivering help.The future of location technology is strong

*As deployment proceeds, technology and system-wide performance will improve.

*Customers increasingly will insist on having it available (like air bags and seatbelts in cars).

*Commercial location-based services will add to customer value and carrier revenue

But to get to the future, those involved-- including the FCC-- will have to redouble efforts to see that the promise of this life saving technology is fulfilled

11 04/22/02

Mobile Positioning System (MPS)

12 04/22/02

Mobile Positioning System Overview -GSM

YellowPages

E-OTD

WAP

PSAP

O/M CenterBilling CenterCustomer Administration Center

MobileNetwork

AGPS

Internet

API

Cell/Sector ID/TimingAdvance

13 04/22/02

ServingMLC

E-911 Phase 2 CAS Push Wireless Emergency Call - GSM

S/R

MS

Ai, Di

MSC

BSS

GatewayMLC

PSAP

ALI DB

ESME

ESNELEC

CM Service Request

BSSMAP Complete Layer 3[CM Service Request]

BSSMAP Perform Location

BSSMAP Perform Location SMLC determines the positioningmethod and instigates the messagesfor the specific positioning methodBSSMAP Perform Location Ack

BSSMAP Perform Location Ack

Call Setup IAM [CgPN = callback#, GDP=ESRD, CGL=lat/long

14 04/22/02

ServingMLC

E-911 Phase 2 NCAS Pull Wireless Emergency Call - GSMInitial position already available in GMLC

S/R

MS

Ai, Di

MSC

BSS

GatewayMLC

PSAP

ALI DB

ESME

ESNELEC

CM Service Request

BSSMAP Complete Layer 3[CM Service Request]

BSSMAP Perform Location

BSSMAP Perform Location SMLC determines the positioningmethod and instigates the messagesfor the specific positioning methodBSSMAP Perform Location Ack

BSSMAP Perform Location Ack

Call Setup

MAP Subscriber Location ReportMAP Subscriber Location Report Ack

ESPOSREQ [callback# or ESRK, INITIAL]esposreq [initial lat/long]

Call Release

MAP Subscriber Location Report[MSISDN, IMSI, MSC address, ESRD, ESRK, CALL RELEASE]

MAP Subscriber Location Report Ack

15 04/22/02

Mobile Positioning System - GSM

16 04/22/02

GSM LCS Architecture

HLR

ExternalLCS Client

GatewayMLC

Lh

MSC/VLR

BSCBTS/LMU B

MS

Um

Other PLMN GMLC

Lg

SMLC

SMLC

Ls(NSS)Lb(BSS)

LpLMU Type A

Um

LMU Type B

Abis

LeLgAAbis

17 04/22/02

Positioning Methods in GSM

Cell- ID and Timing Advance (CGI+TA)

– Network based method Network Assisted GPS (A-GPS)

– Terminal based method Enhanced Observed Time Difference (E-OTD)

– Terminal based method Uplink Time-Of-Arrival (UL-TOA)

– Network based method

18 04/22/02

Cell-ID and Timing Advance

Based on existing CGI and

TA

Default/Fallback

Positioning Method

Used to assist other

positioning mechanisms

Accuracy depends on cell

size and MS distance from

cell

19 04/22/02

E-OTD

Time of Arrival information is collected by

the MS

LMU

LMU

20 04/22/02

E-OTDReal Time Difference

information is collected by the LMU

LMU

LMU

Observed Time Difference(OTD)

information is collected by the

MS

21 04/22/02

E-OTD

OTD and RTD information is

transmitted to the network

PLMN

LMU

LMUObserved Time

Difference (OTD)information is

collected by the MS

Real Time Differenceinformation is collected by

the LMU

22 04/22/02

E-OTD MAIN CHARACTERISTICS

Only small software modifications in the MS needed

Utilises existing capabilities of the GSM network

Accuracy between 50 and 300 m

LMUs have to be placed between every 1-3 base stations

Cost of network upgrade

-+

23 04/22/02

A-GPS

PLMN

GPS Assist information collected by the network

24 04/22/02

A-GPS

Network assist information is transmitted to the MS

GPS Assist information collected by the network

PLMN

25 04/22/02

A-GPS

GPS position fix is determined by the MS (with network assistance)

GPS Assist information collected by the network

Network assist information is transmitted to the MS

PLMN

26 04/22/02

A-GPS

GPS position information is transmitted to the network

GPS Assist information collected by the network

Network assist information is transmitted to the MS

GPS position fix is determined by the MS (with network assistance)

PLMN

27 04/22/02

Assisted GPS variants MS based GPS

– Give full assistance data to MS

– Perform Position calculation in MS

– Greater MS complexity

MS assisted GPS– Provide limited assistance data

– Return TDOA values

– Perform Position calculation in the network

– More signaling, no stand-alone position

28 04/22/02

A-GPS MAIN CHARACTERISTICS

Lower power consumption than GPS

Fast Time-To-First-Fix (TFF)

Accuracy down to 10m

Allows for navigation

Limited indoor coverage (GPS has no indoor coverage)

Fall back solutions in comparison to GPS

Additional HW +SW in the MS

A few DGPS reference receivers needed

-+

29 04/22/02

GSM POSITIONING METHODS - RELATIVE ACCURACIES

Accuracy (meters)

1 3 10 30 100 300 1K 3K 10K 30K

Sub-urban

Urban

Indoor

Rural

City

CGI.GPSA-GPS CGI+TA

E-OTD

30 04/22/02

SERVICE DESCRIPTON

MT-LR Mobile Terminating Location RequestMO-LR Mobile Originating Location RequestNI-LR Network Induced Location Request

GMLC PLMN MS

MT-LRMO-LR

NI-LR

31 04/22/02

EXAMPLES OF SERVICES

Navigation

Real time advertisment

Radio Network Planning

E911, E112

Dynamic call routing

Home Zone Billing

Information

Tracking

Games

FriendFinder

BikeFinder

BrandFinder

MO-LRNI-LRMT-LR

32 04/22/02

Positioning Methods in UMTS

Cell Id

Cell Id + RTT (Round Trip Time)

OTDOA with/without IPDL

Assisted GPS

33 04/22/02

Ericsson Solution

34 04/22/02

MPS-G RoadmapMPS-G Roadmap

SingleCell TAEricssonNetworks

MPS-G 3.0

In Service GSM R8.0

MPS-G 4.0

SingleCell TA/ATIGSM 98/99CompliantBSS-Centric

GA Q1 02GSM R9.0

MPS-G 5 Lite

E-OTD /// LMUsType A

SingleCell TA

GA Q2 02 GSM R9.0

E-OTD /// LMUsType A and Type B

SingleCell TA

A-GPS

MPS-G 5.0 Full

October, 2002 GSM R9.1

35 04/22/02

Design and Verification Procedure

36 04/22/02

Summary of Network Impacts on Positioning Accuracy

• Timing delays due to multipath and distributed components

• Cell size versus accuracy targets and traffic distribution

• Relative base station location and MS-BTS location

• BCCH and BSIC planning and adequate C/I(MS & LMU)

• Neighbor definitions and positioning considerations

•Mobile Station assistance Data

37 04/22/02

System Prerequisites for E-OTD

• Each cell seen by at least 1 LMU

• RXLev at LMU Antenna connector >= -110 dBm

• C/I at LMU >= 10 dB

• C/A (200 kHz) >= -8 dB

• C/A (400 kHz) >= -41 dB

• Mean excess delay for LMU is assumed to be 0.15 s

• GDOP between 1 and 1.5

• BTS coordinates known in three dimensions within 5-10 m

38 04/22/02

Network Recommendations to Meet Positioning Accuracy Targets

Actions will be investigated in order increasing cost and complexity.

• BSIC Replanning

• BCCH Frequency Plan Retune

• Changes to Certain RN Features (HCS, Cell Load Sharing, etc.)

• Modifications to existing sites (antennas, output power, etc.)

• Site Additions in Certain Areas

39 04/22/02

Core Network Design - GMPC and SMPC Dimensioning

OtherPLMN

Lb

GMPC

GMPCExternal LCS client

SMPC

MSC/VLR

HLR

BSC

A

Type A

Abis

Type B

RBS

LMU

LMU

Lg

LsLh

The number of and location of all MPS-G nodes

All MPS-G node interconnections to the BSC and LMUs

Link dimensioning

Throughput and delay calculations

Redundancy

The impact, if any, of additional links and traffic on the existing GSM nodes.

Comprehensive core network diagram.

40 04/22/02

Design and Verification Process

Parameter Settings Preparation

Parameter Settings Preparation

Site Survey, Evaluation & Measurements

Site Survey, Evaluation & Measurements

3rd Best Serving SiteCoverage Analysis

3rd Best Serving SiteCoverage Analysis

Initial LMU Design and Required Network Changes

Initial LMU Design and Required Network Changes

GDOP AnalysisGDOP Analysis

G/SMPC DimensioningG/SMPC DimensioningLMU-A/BTS SMS DimensioningLMU-A/BTS SMS Dimensioning

Implementation of Network Changes

[Carrier Responsibility]

Update of LMU DesignUpdate of LMU Design

Carrier InputCarrier Input

LMU BTS ListLMU BTS List

INP

UT

DE

SIG

N

41 04/22/02

Design and Verification Process (cont’d)

Positioning VerificationPositioning Verification

Verification ReportVerification Report

Installation and Integration of Additional

Equipment[If Necessary]

Positioning Re-Verification[If Necessary}

Positioning Re-Verification[If Necessary}

VE

RIF

ICA

TIO

N

AcceptanceAcceptance

Installation and Integration of Equipment

Not part of design or verification process

Involves field work

Analysis activities

Design and dimensioning activities

42 04/22/02

Why Ericsson MPS

43 04/22/02

MPC Applications

and Content

Consulting /Integration

NetworkSystems

Devices /Terminals

End-to-end solution

!

Design &Verification

44 04/22/02

26 commercial contracts already signed (As of today))

4 contracts signed in US from 3 major operators for MPS solution both in

GSM (GMPC, SMPC/PDE, LMU-A/B and SW upgrade for the other nodes in Core network as well as access network) &

TDMA

~5 trials

~3 Letters of Intent

MPS references

45 04/22/02

Complete Solutions from Ericsson Location Technology & Roadmap

Mobile Positioning System (TDMA, GSM, UMTS) Basic and high location accuracy Roadmap for the future Presence in all LCS standard activities

Location Based Applications Ericsson together with Partners

Service Enabling Products WAP Gateway, Middleware, WAP Application Server, etc.

Services Design & Verification Integration, installation, training etc. Branding, pricing, etc.