A High-Accuracy, Low-Cost Localization System for Wireless Sensor Networks
Wireless Accuracy for 9-1-1
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Transcript of Wireless Accuracy for 9-1-1
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Wireless Accuracy for 9-1-1
2016 Florida NENA Spring Conference
Rolf Preuss, ENP, FPEM
Essential Management Solutions
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Housekeeping
• Exits
• Restrooms
• Vending -> Starbucks
• Please silence your phones
• If you need to take a call, please respect others
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Essential Management Solutions, LLC
We are a Public Safety Consulting Firm working with Federal, State, County and local agencies.
Some of our services:
• Software Solutions
• Radio System Design and Implementation
• Enhanced 9-1-1 System Development
• Regionalization of 9-1-1 Service and Technology
• 9-1-1 Strategic Planning Fiscal Support and Grant Management
• Next Generation Network Design
• Systems and Network Security Assessment
• Wireless 9-1-1 Post Deployment Solutions and Support
• Wireless Accuracy Testing
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Wireless Accuracy for 9-1-1
• 9-1-1 In the News
• 9-1-1 Systems and Technology
• Wireless Technology
• Wireless Accuracy
• Wireless Routing Sheets
• Wireless Network Testing
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9-1-1 In the News
• Around 4:00 am a newspaper delivery woman drove into a residential retaining pond
• The 9-1-1 operator could not locate her (even though she provided her location)
• “Give me the address one more time. It’s not working.” … “I don’t have that.”
• She was trapped 100 yards from the county line and the call was picked up by a tower in the neighboring county
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9-1-1 In the News
x
x
Call Handling Agency’s Jurisdiction
Call Handling Agency’s Jurisdiction
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9-1-1 Systems and Technology
9-1-1 Systems were designed to work with this
Period.
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9-1-1 Systems and Technology
Soon someone had a great idea
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9-1-1 Systems and Technology
And technologies continue to evolve…
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Wireless Accuracy
Wireless Accuracy is only as good as the carrier’s configuration allows
But the FCC says….
Wireless Accuracy levels vary by location technology utilized; handset vs. network (handset accuracy > network accuracy )
Benchmarks are increasing in favor of public safety; some concessions are given to the wireless providers
Benchmarks include certain exclusions
. . .
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Wireless Accuracy
What do we need for a successful Wireless 9-1-1 call:
• Proper Call Routing
• Proper Cell Tower Locations
• Proper Cell Tower Information (Cell Sector Orientations, Cell Sector Center Points, Cell Sector Broadcast Footprint)
• Proper Network Performance – Always expected
• Specific Network Performance – Sometimes needed
. . . . .
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Wireless Accuracy
How do we obtain (and verify) all this information?
Audit available information
-> In the Office:
-> Wireless Routing Sheets
Audit available performance
-> In the Field:
-> Wireless Network Testing
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Wireless Routing Sheets
How much time have you spent with your Routing Sheets lately?
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Wireless Routing Sheet
Great information, given away by Wireless Service Provider. Typically contains:
• Cell Site and Sector (Name, ID, Width and Radius)
• Cell Site Address (Street, City, County, Coordinates)
• Target PSAP and Wireless Emergency Services Zone
• Display Preference (Street, Intersection, Community)
• Carrier internal (Market ID, Switch ID, Technology, ESRK, Live Date, Testing Information, Notes, etc)
• Alternate Routing Information
What could go wrong?
. . . . . . .
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Wireless Routing Sheet
Cell Site and Sector (Name, ID, Width and Radius)
• Cell Site ID rarely changes
• Sectors can change orientation
• Sectors can change width
• Sectors can change radius
• Cell sites can be turned down (“no longer active”)
. . . . .
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Wireless Routing Sheet
Cell Site and Sector (Name, ID, Width and Radius)
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Wireless Routing Sheet
Cell Site and Sector (Name, ID, Width and Radius)
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Wireless Routing Sheet
Cell Site and Sector (Name, ID, Width and Radius)
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Wireless Routing Sheet
Cell Site and Sector (Name, ID, Width and Radius)
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Wireless Routing Sheet
Cell Site and Sector (Name, ID, Width and Radius)
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Wireless Routing Sheet
Cell Site and Sector (Name, ID, Width and Radius)
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Wireless Routing Sheet
Cell Site Address (Street, City, County, Coordinates)
• Cell Site Address can be stripped off
• Cell Site Street Address frequently wrong
• Cell Site Street Address flipped between adjoining towers
• Cell Site Coordinates can be wrong – from a few hundred feet to many miles
. . . .
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Wireless Routing Sheet
Target PSAP and Wireless Emergency Services Zone
• Target PSAP might not be the one preferred
• Wireless Emergency Services Zone/Number needs to be verified
. .
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Wireless Routing Sheet
Display Preference (Street, Intersection, Community)
• Display Preference should fit in local scheme
• Display Preference should be consistent
• Displayed information should be accurate
• Displayed information should be helpful to call taker
. . . .
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Wireless Routing Sheet
Carrier internal (Market ID, Switch ID, Technology, ESRK, Live Date, Testing Information, Notes, etc.)
• Carrier internal mostly proprietary
• Carrier internal useful information (Live Date, Testing, etc.)
• Carrier internal important information (ESRK, Technology, etc.)
. . .
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Wireless Routing Sheet
Alternate Routing Information
• Alternate Routing Information review by case (overflow, network congestion, maintenance, outage, etc.)
• Alternate Routing Information review for accuracy
• Alternate Routing Information review periodically
• Alternate Routing Information coordinated regionally -> Work with your Neighbors
. . . .
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Wireless Network Testing
Considered proprietary information, not likely given away by Wireless Service Provider
• Statistical models can provide a baseline – site testing provides actual performance results
• Field testing of carrier cells and sectors is the most accurate way to test performance
• Collected key test metrics are the most accurate way to remediate carrier anomalies.
. . .
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Wireless Network Testing
How do we get this information?
• Ask the service provider
• Field testing with cell phones and document results
• Call in the Professionals
. . .
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Wireless Network Testing
General Drive Testing Layout
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Wireless Network Testing
A few results from the field
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Wireless Network Testing
A few results from the field
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Wireless Network Testing
A few results from the field
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Where do we go from here?
• Try to stay up to date with Routing Sheets
• Carefully review any additions
• Verify (and map) any changes
• Review all Routing Sheets regularly
• Perform Network Field Testing
• Test any reported trouble areas
• Plan on annual base line testing
• Work with your neighbors
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Wireless Accuracy for 9-1-1
• 9-1-1 In the News
• 9-1-1 Systems and Technology
• Wireless Technology
• Wireless Accuracy
• Wireless Routing Sheets
• Wireless Network Testing
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Time for Questions
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Thank you
Rolf Preuss ENP FPEM
Essential Management Solutions
407-205-4603
EMSolutionsllc.net