wireless signatures technology for position location · pdf filewireless signatures technology...
TRANSCRIPT
![Page 1: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/1.jpg)
1
Wireless Signatures Technology Wireless Signatures Technology for Position Locationfor Position Location
Marty Feuerstein
Presented to
ISART 2004
March 2, 2004
![Page 2: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/2.jpg)
2
Overview of Wireless Location Signatures
Technology
![Page 3: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/3.jpg)
3
Wireless Location Signatures• Mobile phone measures and reports signal strengths of
neighbor cell control channels– Reported mobile assisted handover (MAHO) information
– Aggregated into network measurement reports (NMRs)
• Every location creates a unique Wireless Location Signature– Combine signal strength, delay and temporal behavior
• Components of Wireless Location Signatures technology– Predicted Signature Database (PSD) provides highly accurate model
of wireless radio environment
– Location Engine capitalizes on proprietary statistical algorithms to estimate the location of handsets
![Page 4: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/4.jpg)
4
Wireless Signatures Components
• Location Engine– Process location estimation requests from network– Produce the position estimate
• PSD Manager– Automatically update PSD for RF network changes– Track and alarm PSD and network anomalies
• PSD Toolkit– Provision PSD (GIS data, parameters, etc.)– Maintain location system accuracy
• Create or refresh PSD with new drive test data• Manage PSD for network changes and anomalies
– Test location system accuracy off-line• Batch location estimation processing• Produce performance statistics
PSDToolkitPSD
Toolkit
PSDManager
PSDManager
LocationEngine
LocationEngine
PSDPSD
![Page 5: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/5.jpg)
5
What is a Wireless Signature?Take Advantage of Three Scales of RF Spatial Variation
Prec (dB)
LogR
Shadow (Slow) Fading
xM
Sign
al
λ/2Fast Fading
Range Dependence:
Po - 10nLogR
![Page 6: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/6.jpg)
6
GSM E-911 Architecture
GMLC
MSC
BSC
SMLC
BTS
OMC
PCF
BSC Base Station ControllerBTS Base Transceiver StationGMLC Gateway Mobile Location CenterMSC Mobile Switching CenterPCF Position Calculation FunctionPSAP Public Safety Answering PointSMLC Serving Mobile Location CenterOMC Operational & Maintenance CenterSNMP Simple Network Management Protocol
PSDToolkit
Polaris SystemSNMP
Lb
Ls
Lg
PSAP
![Page 7: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/7.jpg)
7
Wireless Location SignaturesCombined with A-GPS
![Page 8: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/8.jpg)
8
Wireless Signatures & A-GPS Combined• When 0-1 satellites are reported by handset, use Wireless
Signatures location estimate• When 2 satellites are reported by handset, create joint Wireless
Signatures & A-GPS location estimate• When >2 satellites reported, A-GPS can suffer from bad
geometry or multipath, create joint location estimate
5 10 15 20 25 30 35 40 45 50
5
10
15
20
25
30
35
40
45
50
HALOTech Location Contours
AGP S Location Contours
Accuracy improvement overWireless Signatures alone depends on collection geometry
• If as shown, improvement could be significant
• If TDOA contours aligned with major axis of Wireless Signaturesuncertainty, less improvement
A-GPS Location Contours
Wireless Signatures Contours
![Page 9: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/9.jpg)
9
Field Trial and OET Test Results
![Page 10: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/10.jpg)
10
San Jose Testbed: GSM ResultsWireless Location Signatures performance
• Accuracy better than 83 m, 67% of cases• Accuracy better than 291 m, 95% of cases
![Page 11: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/11.jpg)
11
San Francisco Testbed: GSM ResultsWireless Location Signatures performance
• Accuracy better than 80 m, 67% of cases• Accuracy better than 197 m, 95% of cases
![Page 12: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/12.jpg)
12
Orange UK Field Trial
• Trial area: Bristol, England– Urban & suburban areas, with 152 cell sectors– Urban inter-site average spacing: 290 m– Suburban inter-site average spacing: 720 m– Total number of measurement reports: ~ 29,000
• Blind test protocol
• Evaluate accuracy for commercial Location Based Services (LBS)
• Summary of location accuracy results for combined urban & suburban areas– 65 m for 67% of cases– 263 m for 95% of cases
![Page 13: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/13.jpg)
13
Orange UK Trial: Urban ResultsWireless Location Signatures performance
• Accuracy better than 48 m, 67% of cases• Accuracy better than 165 m, 95% of cases
![Page 14: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/14.jpg)
14
Orange UK Trial: Suburban ResultsWireless Location Signatures performance
• Accuracy better than 81 m, 67% of cases• Accuracy better than 361 m, 95% of cases
![Page 15: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/15.jpg)
15
Vodafone Field Trials• 2-phase competitive field trials in 2002 & 2003
– 8 - 10 network-based E-CGI location technology companies from around the world
– Blind test protocol used by Vodafone– Dortmund, Germany; urban, suburban, & rural areas– London, UK; urban & suburban areas– Off-line & real-time testing
• Polaris technology evaluated as having the bestperformance in both trial phases (>70% over closest competitor)
• Polaris system was the only competitor to meet stringent marketing requirements
![Page 16: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/16.jpg)
16
Dense Urban -- LondonUsed only single NMR, rather than block of 50-55 NMRs typically observed in E-911 call interval
• Accuracy better than 38 m, 67% of cases• Accuracy better than 88 m, 95% of cases
![Page 17: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/17.jpg)
17
Triton PCS: Live Network OET Tests (IS-136)• OET test area
– Spartanburg & Greenville, SC– Suburban, rural, & highway– 60 sites, 150 sectors (cells)
• OET testing protocol– End-to-end system testing with real-time processing– Mix of moving & stationary location fixes – Position response time within 30 seconds per location fix– MAHO data for position estimation received over E12 interface– Ground truth determined from GPS receiver– Nokia and Ericsson handsets used
• Test results show Wireless Location Signatures is compliant with FCC’s E-911 Phase II accuracy requirements
![Page 18: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/18.jpg)
18
Triton PCS: OET Test Summary
![Page 19: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/19.jpg)
19
Network OET Test Results -- Suburban
1642 Calls:
67% 86m95% 294m
1Km
Greenville, SC
![Page 20: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/20.jpg)
20
Network OET Test Results -- Suburban
1311 Calls:
67% 97m95% 302m
2Km
Spartanburg, SC
![Page 21: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/21.jpg)
21
Accuracy Test Summary
0
10
20
30
40
50
60
70
80
90
100
San Jo
se, C
A; IS-13
6San
Jose
, CA; G
SMBris
tol, U
K; GSM
Greenv
ille/S
parta
nburg
, SC; IS
-136
San Fran
cisco
, IS-13
6San
Francis
co, G
SMBris
tol, U
K; GSM
Lond
on, U
K; GSM
67%
Acc
urac
y (m
)
Suburban
Urban
![Page 22: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/22.jpg)
22
Example Application:Network Optimization
![Page 23: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/23.jpg)
23
Traffic Density MapColor coding is number of calls in 100 X 100 m bins during sample hour
![Page 24: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/24.jpg)
24
Dropped Call MapColor coding is number of dropped calls in 100 X 100 m bins during sample hour
![Page 25: Wireless Signatures Technology for Position Location · PDF fileWireless Signatures Technology for Position Location. ... BTS OMC PCF BSC Base Station ... Color coding is number of](https://reader033.vdocuments.us/reader033/viewer/2022051600/5a9e13627f8b9adb388dfb21/html5/thumbnails/25.jpg)
25
Conclusions• Compliant with E-911 Phase II accuracy
requirements for GSM & IS-136• Economical for service providers and public
safety community• Immediate coverage for entire installed
customer base• High reliability/availability of location system
• Deploy as standalone or hybrid system• Support network optimization and location
based services