Wireless E911 Overview and Status Update

David WoodcockDirector, Product Management

Motorola Canada PCS

david.woodcock@motorola.com

FCC E911 MandateThis year*• 100m accuracy for 67% of calls• 300m accuracy for 95% of calls

Phase 2*• 50m accuracy for 67% of calls• 150m accuracy for 95% of calls

Subscriber Activations*• Certain % of new adds must be location-capable

*Exact dates and mandate vary by carrier

Position Determination OptionsPosition Determination OptionsNetwork-Based Assisted GPS

• Technologies– TDOA (3 sites minimum)– AOA (2 sites minimum)– Multipath “Fingerprint” (1

site minimum)• New site equipment• Legacy handset are

supported

• Handset modifications– Memory– A-GPS Integrated Chip Sets– Second Antenna– Software

• 1 site + 3 GPS Sat solution• New network boxes• Legacy handsets not

supported

ServingCell

NeighborCell # 1

NeighborCell # 2

MS

Wideband orScanningReceivers

LocationCalc & Control

GPSAssist

E-OTD/AFLT

ServingCell

NeighborCell # 1

NeighborCell # 2

MSSynchronizedSites or LMU’s

• Handset modifications– Software– Memory

• TDOA (3 sites minimum)• May require new site

equipment & network boxes• Legacy handsets not

supported

ServingCell

MS

LocationCalc & Control

GPSSat

How they compare

MLCMLC

MLCMLC

Increase in Accuracy

Increase in Coverage (Dense Urban, Valleys, Indoors)

Increase

Accuracy

Cell ID EOTD, AFLT GPS (Auto) A-GPS (Assist)

HS Changes None Software SW + HW SW + HWAdded Cost None Low High HighAccuracy 100-1000 m (Cell) 75- 300 m 15-150 m 1-100 m TTFF < 5 Sec 5-20 Sec 10-60 Sec <5 Sec

Hybrid: EOTD / AFLT

Network sends a burst message to the handset

Handset calculates time differentials & reports back.

Network calculates handset position

Hybrid: AGPS

GPS

Assistance data

Network provides assistance data to handset to limit satellite acquisition times.

Handset receives GPS data from satellites (three required for position determination)

Handset reports ‘pseudo-ranges’ to network for position determination.

Pseudo-ranges

Network calculates handset position

Handset vs. Network Based

• Pros– Minimum Network Impact– Greater Subscriber Privacy?– Proven High Degree of

Accuracy Using GPS– Less network maintenance

• Cons– Legacy Issue

– Handset size, cost, battery life

– GPS antenna issues

• Pros– Ability to Deploy

on an as Needed Basis

– Addresses Legacy Phones and Roamers

• Cons– More Site Antennas or new sites may

be Required in Some Areas

– Additional Equipment At Cell Site

– Large Initial Capital Requirement

– Calibration and additional maintenance

Handset Network

U.S. Carrier Plan of Record

Carrier MA Location TechnologyGSM E-OTD

TDMA/GSM Network / E-OTDTDMA/GSM Network / E-OTDCDMA2000 AGPS/AFLTCDMA2000 AGPS/AFLTCDMA2000 AGPS/AFLT

iDEN AGPS

                     

U.S. Carriers have selected handset-based solutions

Motorola Handset RoadmapGSM/GPRS• Several EOTD-capable products launching in

2H02• All future products will have EOTD

CDMA/1X• One AFLT handset launching in June• Three AGPS handsets launching in 2H02• All future products will have AGPS

Multiple hardware and software solutions available for EOTD / AGPS

Then What?

Carrier network must calculate and report location to PSAP

“Push” – if location information is available at call-setup

“Pull” – if not available initially, or to update location information during call

PSAPs must be ready to integrate ALI from wireless devices

Issues…Relevance

– Does the (mobile) location data have any meaning?– How current is it? (street addresses can’t move…)

Accuracy– Performance in urban and rural areas– Satellite acquisition / multi-path signals– Cell site separation

Privacy– Do users really want to be found?– Users have ability to disable location service except during

911 calls

The challenge goes beyond technology

Handset capabilities are just the foundation

Network location determination

PSAP capabilities

Handset location capabilities

Data Usefulness

Many bricks needed to build the structure

Thank you

www.motorola.ca