motorola labs 28 june 1999fcc location round table e911 phase 2 location solution landscape mark...
TRANSCRIPT
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
E911 PHASE 2 LOCATION SOLUTION LANDSCAPE
Mark Birchler, Manager
Wireless Access Technology Research
Motorola Labs
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
ACRONYMS
• A-GPS– Assisted Global Positioning System
• AOA– Angle of Arrival
• E-FLT– Enhanced Forward Link Triangulation
• E-OTD– Enhanced Observed Time Difference
• RSS– Received Signal Strength
• TDOA– Time Difference of Arrival
• TOA– Time of Arrival
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
LOCATION SOLUTION “FAMILY TREE”
“Where are you?”“Where are you?”
NETWORKNETWORK HANDSETHANDSET
“Fingerprint”“Fingerprint” AOAAOATDOATDOA E-OTD (TDOA)E-OTD (TDOA) A-GPSA-GPS
E-FLTE-FLT
TDOA+
AOA
TDOA+
AOA
TOATOATDOA+
RSS
TDOA+
RSS
E-OTD+
A-GPS
E-OTD+
A-GPS
GPSGPS
E-FLT+
A-GPS
E-FLT+
A-GPS
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
NETWORK BASED: TDOA
• Network impact– Location calculation and control
– Network interconnection (digital systems)
• Site impact– Location receivers
• Handset impact– None
• Systems addressed– Shipping product: AMPS
– Announced product: [need data]
– Under development: [need data]
• Legacy handsets– Covered
• TDOA: Time Difference of Arrival– Minimum of 3 sites measure
arrival time of MS transmission
– Location solution based on apparent arrival time differences between pairs of sites
ServingCell
NeighborCell # 1
NeighborCell # 2
MS
LocationCalc & Control
LocationReceivers
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
NETWORK BASED: AOA
• Network impact– Network interconnection (digital
systems)
– Location calculation and control
• Site impact– Location receivers
– Additional antenna arrays plus cables
• Handset impact– None
• Systems addressed– Shipping product: [need data]
– Announced product: [need data]
– Under development: [need data]
• Legacy handsets– Covered
ServingCell
NeighborCell # 1
MS
LocationReceivers
LocationCalc & Control
• AOA: Angle of Arrival– Minimum of 2 sites measure
arrival angle of MS transmission
– Location solution based on apparent signal arrival angle
AntennaArray
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
NETWORK BASED: MULTIPATH FINGERPRINT
• Network impact– Network interconnection (digital
systems)
– Location calculation and control
• Site impact– Location receivers
• Handset impact– None
• Systems addressed– Shipping product: [need data]
– Announced product: [need data]
– Under development: [need data]
• Legacy handsets– Covered
ServingCell
MS
LocationReceivers
LocationCalc & Control
• Multipath Fingerprint– Minimum of 1 site measures
attributes of received signal (i.e., “multipath fingerprint”)
– Location solution based on matching of received signal fingerprint with predetermined location/fingerprint data base
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
HANDSET/NETWORK BASED: E-FLT
• Network impact– Location calculation and control
• Site impact– Calibration of site sync
• Handset impact– None
• Systems addressed– Shipping product:
– Announced product:
– Under development: CDMA
• Legacy handsets– Covered
• E-FLT: Enhanced Forward Link Triangulation– TDOA solution based on MS
measurements
– TOA ranging & coarse AOA via existing site antennas
• CDMA unique solutionCDMA unique solution
ServingCell
NeighborCell # 1
NeighborCell # 2
MS
SynchronizedSites
LocationCalc & Control
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
HANDSET BASED: A-GPS
• Network impact– GPS assist and location calculation
• Site impact– Potential enhancements for non-
synchronized systems
• Handset impact– Second GPS antenna
– GPS RF front end & processing
– Memory
– Software
• Systems addressed– Shipping product: [need data]
– Announced product: [need data]
– Under development: [need data]
• Legacy handsets– Not covered
• A-GPS: Assisted Global Positioning System– Minimum of 1 site data link plus
time of arrival (TOA) measurements to 3 GPS satellites (SV)
– Location solution based on apparent TOA from GPS SVs
GPS Assist&
Location Calc
ServingCell
MS
GPSSV
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
HANDSET BASED: E-OTD
• Network impact– Location calculation and/or control
• Site impact– EITHER time synchronization
enhancement
– OR site time error measurement and calibration (LMU’s)
• Handset impact– Memory
– Software
• Systems addressed– Shipping product: [need data]
– Announced product: [need data]
– Under development: GSM
• Legacy handsets– Not covered
ServingCell
NeighborCell # 1
NeighborCell # 2
MSSynchronizedSites or LMUs
LocationCalc & Control
• E-OTD: Enhanced Observed Time Difference– TDOA solution in handset
– Arrival time of transmissions from a minimum of 3 sites
– Location solution based on apparent arrival time differences between pairs of sites
Motorola Labs Motorola Labs
28 June 1999FCC Location Round Table
COMPOSITE SYSTEMS
• AOA + RSS (Received Signal Strength)
• AOA + TDOA
• E-OTD + A-GPS
• A-GPS + E-FLT
• Other?