Importance of Locating Wireless 911 Calls Indoors - NENA Webinar Presentation (v6) 041812 Final...

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The Importance of LocatingWireless 9-1-1 Calls IndoorsApril 19, 2012


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Sara KaufmanAnalyst, Telco StrategyOvum


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Agenda

Indoor Location a Growing Problem

Solutions Exist Today

The FCC Should Act Now

Get Involved

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Presenters

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Trey Forgety, Government Affairs Director, NENA Mr. Forgety is an associat ion executive and telecommunications attorney

with experience in FCC, NTIA, DHS, and White House policy making. He has adetailed knowledge of public safety telecommunications issues.

Sara Kaufman, Analyst, Telco Strategy, Ovum

Ovum has been studying the global telecommunications industry for morethan 30 years. Sara Kaufman brings a decade of technology experience with acurrent focus on the telecommunications market and regulatory trends.

Dr. Rash Mia, VP of Technology and Chief Scientist, TruePosit ion

Dr. Mia is a leading global expert in wireless location technology, and heholds numerous US and international patents. He has more than 20 years ofexperience developing complex signal processing systems.


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Trey ForgetyGovernment Affairs DirectorNENA


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A Growing Problem

Ovum forecasts the number of wireless subscribers in the US to be 358million in 2012. By 2016, the number of wireless subscribers will growto 425 million.

According to the CTIA, over 296,000 wireless calls are made to 9-1-1

every day.

According to the FCC, it is estimated that about 70 percent of 9-1-1 callsare placed from wireless phones, and that percentage is growing.

According to the FCC, one quarter of all households have now stopped

their landline service and solely use cell phones to communicate.

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A Growing Problem

In a 2010 study, the National Health Interview Survey (NHIS)indicated that the number of American homes with only cell

phones continues to grow.

More than half of adults aged 2529 years (51.3%) live in

households with only cell phones.

Nearly half of all adults renting their home (47.1%) had only cell

phones.

Nearly one of every six American homes (15.9%) makes all oralmost all calls on cell phones despite having a landline.

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FCC Phase II Mandate

FCC docket opened in 1994 (94-102)

In 2001, location accuracy standards were established by

the FCC

Handset-based solut ion given more time than network-based

(up to 5 years) for deployment, but held to more stringentaccuracy rules

50m for 67% of calls


Network-based solution required quick deployment (within 6-18

months), but held to less stringent accuracy rules



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Major wireless carriers ran extensive trials of various

technologies.

Major CDMA carriers chose a handset-based solution

(A-GPS)

Major TDMA carriers (that later transitioned to GSM)

chose a network-based solution (U-TDOA)

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FCC Phase II Mandate Wireless Carrier Responses


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Overview of Major 9-1-1 Location Methods

Assisted-Global Positioning System(A-GPS)

A-GPS uses a chip within the mobilephone to receive signals fromorbiting satellites

Assistance data is provided by thecellular network to improve thetime to first fix

Does not work well indoors or incities with tall buildings due toline of sight issues

Not all cell phones are GPS-enabled(legacy phones, etc.)

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Uplink Time Difference of

Arrival (U-TDOA)

Calculates a location based

on mult iple time difference

of arrival measurements

Measurements are made

from highly sensit ive

Location Measurement

Units (LMUs) located at or

near cell sites

Measurements are sent to

a central node that

calculates the location

Overview of Major 9-1-1 Location Methods


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Recent and Proposed FCC Rule Changes

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Phase II Rule

Changes(January 2011)

Accuracy measured at a county-based geographic level

Carriers permitted to use trending of uncertainty data(after establishing baseline accuracy)

Carriers permitted to blend handset- and network-basedresults

Phase II Rule

Changes(July 2011)

Single accuracy requirement after 2019

Carriers must perform periodic testing in place oftrending uncertainty data Specific testing rules will be defined by the

Communications, Security, Reliability and InteroperabilityCouncil (CSRIC)

Indoor results excluded; new requirements apply to

outdoor calls onlyProposed RuleChanges(July 2011)

Proposed indoor location requirements Proposed accuracy testing definitions and standards


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Despite the FCCs ongoing improvements and clarifications,

there is still work to be done

Lack of indoor accuracy standards represents a big gap in thecurrent FCC mandate

Current FCC rules fail to address the critical needs

There is a significant and growing number of wireless callers who usetheir wireless phone primarily indoors

The number of US households that use cell phones as their primary or

only phone service is rapidly increasing

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Still Work to be Done


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Common Misconceptions About Wireless Location

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Misconceptions Reality

A-GPS is a sufficient solutionfor wireless location

There is no technological

solut ion available today

Indoor testing is too time-intensive and expensive

A-GPS has limitedperformance indoors

An A-GPS/U-TDOA hybrid

location solution currentlyexists

There are methods currentlyavailable to efficiently and

cost-effectively conductindoor testing


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Dr. Rash MiaVice President of Technologyand Chief Scientist

TruePosition


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Goal:

Test real world accuracy of network-based (U-TDOA) andhandset-based (A-GPS) location technologies

Parameters:

Real world testing conducted in Wilmington, DE

Hundreds of wireless test calls made 50 per test point Multiple measurements and ground truth collected for each

test point

A-GPS and U-TDOA calls performed simultaneously

Implementation: Placed wireless emergency 9-1-1 calls

Performed tests using both indoor and outdoor test points

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Location Testing Methodology


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Location Testing Test Points

100 South French StreetWilmington, DE

222 Delaware AvenueWilmington, DE

4755 Ogletown-Stanton RdNewark, DE

26 Karlyn DriveNew Castle, DE

100 Continental DriveNewark, DE

6000 Kirkwood HighwayWilmington, DE

1790 West Newport PikeWilmington, DE

750 Library AvenueNewark, DE

3400 North Market StreetWilmington, DE

17 West Main StreetNewark, DE

320 Duport HighwayNewcastle, DE

Test points selected

to represent avariety of

environments and

conditions.


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Location Testing Outdoor Call Results

N 67% 90% 95%

A-GPS 550 12.8m 36.0m 72.3m

U-TDOA 550 40.4m 90.9m 102.4m

Hybrid (Selection) 550 12.8m 32.3m 60.1m

Hybrid (Weighted) 550 12.5m 29.3m 59.9m


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N 67% 90% 95%

A-GPS 752 621.2m 1451.8m 2140.0m

U-TDOA 752 62.7m 98.6m 122.0m



Location Testing Indoor Call Results


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Location Testing All Points, Blended Call Results

N 67% 90% 95%

A-GPS 1302 220.8m 1093.8m 1461.9m

U-TDOA 1302 55.1m 95.6m 112.1m




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Ovum Analysis of Location Testing Results

A-GPS outdoor results 13m 36m 72m Inadequate

A-GPS indoor results 621m 1451m 2140m

A-GPS blended results all test points 221m 1094m 1462m

U-TDOA outdoor results 40m 91m 102m Adequate

U-TDOA indoor results 63m 99m 122m

U-TDOA blended results all test points 55m 96m 112m

Selection hybrid outdoor results 13m 32m 60m Better

Selection hybrid indoor results 58m 89m 108m

Selection hybrid blended results all test points 41m 75m 96m

Weighted hybrid outdoor results 13m 29m 60m Best

Weighted hybrid indoor results 57m 89m 108m

Weighted hybrid blended results all test points 41m 74m 95m

FCC benchmarks for % of calls 67% 90% 95%

Handset based accuracy requirements 50m 150m Separate rules willsunset after 2019Network-based accuracy requirements 100m 300m

Does not meet mandated outdoor accuracy requirementsMeets mandated outdoor accuracy requirements

Note: Current FCC requirements apply to outdoor accuracy measurements only.


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Conclusion

Locating wireless 9-1-1 calls indoors remains a growing problem

A-GPS has limited performance indoors

An A-GPS/U-TDOA hybrid solution, which exists today, accurately

locates cell phones indoors

There are methods currently available to efficiently and cost-effectively conduct indoor testing

To ensure the optimum safety of US citizens, the FCC must move

forward with their proposed indoor location requirements

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Get Involved

Visit www.trueposition.com/ovum to download the Ovum white

paper, which provides more information about the research

results

Visit the FCC Electronic Comment Filing System (ECFS) to provide

your thoughts and on this growing indoor location issue

Here is the link:

http:/ /apps.fcc.gov/ecfs/upload/display?z=vsc5.

Be sure to reference Docket Number 07-114

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Questions and Answers

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Trey Forgety, Government Affairs Director, NENA

Dr. Rash Mia, VP of Technology and Chief Scientist, TruePosit ion

Sara Kaufman, Analyst, Telco Strategy, Ovum


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The Importance of LocatingWireless 9-1-1 Calls IndoorsApril 19, 2012

Importance of Locating Wireless 911 Calls Indoors - NENA Webinar Presentation (v6) 041812 Final...

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