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Wireless E911 Overview and Status Update. David Woodcock Director, Product Management Motorola Canada PCS [email protected] FCC E911 Mandate. This year* 100m accuracy for 67% of calls 300m accuracy for 95% of calls Phase 2* 50m accuracy for 67% of calls

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wireless e911 overview and status update
Wireless E911 Overview and Status Update

David Woodcock

Director, Product Management

Motorola Canada PCS

[email protected]

fcc e911 mandate
FCC E911 Mandate

This 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 options
Position Determination Options

Assisted GPS

Network-Based

E-OTD/AFLT

GPS

Sat

Location

Calc & Control

Location

Calc & Control

GPS

Assist

Serving

Cell

Serving

Cell

Serving

Cell

Neighbor

Cell # 1

Neighbor

Cell # 1

MS

Synchronized

Sites or LMU’s

MS

MS

Wideband or

Scanning

Receivers

Neighbor

Cell # 2

Neighbor

Cell # 2

  • 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
  • Handset modifications
    • Software
    • Memory
  • TDOA (3 sites minimum)
  • May require new site equipment & network boxes
  • Legacy handsets not supported
how they compare

MLC

MLC

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

HS Changes None Software SW + HW SW + HW

Added Cost None Low High High

Accuracy 100-1000 m (Cell) 75- 300 m 15-150 m 1-100 m

TTFF < 5 Sec 5-20 Sec 10-60 Sec <5 Sec

Increase in Accuracy

Increase in Coverage (Dense Urban, Valleys, Indoors)

How they compare

Increase Accuracy

hybrid eotd aflt
Hybrid: EOTD / AFLT

Network sends a burst message to the handset

Handset calculates time differentials & reports back.

Network calculates handset position

hybrid agps
Hybrid: AGPS

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

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

Assistance data

GPS

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

Handset vs. Network Based

Network

Handset

  • Pros
    • Ability to Deploy
    • on an as Needed Basis
    • Addresses Legacy Phones and Roamers
  • Cons
    • Legacy Issue
    • Handset size, cost, battery life
    • GPS antenna issues
  • 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
u s carrier plan of record
U.S. Carrier Plan of Record

U.S. Carriers have selected handset-based solutions

motorola handset roadmap
Motorola Handset Roadmap

GSM/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
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
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
Handset capabilities are just the foundation

Data Usefulness

PSAP capabilities

Network location determination

Handset location capabilities

Many bricks needed to build the structure

thank you

Thank you

www.motorola.ca

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