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Part J: Technology. Pasi Pekkinen pasi.pekkinen@navinova.com Navinova Oy . Key messages. Standardising positioning technologies and the interchange of data with other systems a great challenge LBS will be a part of personalised services Basic positioning is available: Cell ID

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part j technology

Part J:Technology

Pasi Pekkinen

pasi.pekkinen@navinova.com

Navinova Oy

key messages
Key messages
  • Standardising positioning technologies and the interchange of data with other systems a great challenge
  • LBS will be a part of personalised services
  • Basic positioning is available: Cell ID
  • More accurate methods will be available
    • require investments in devices and/or networks
  • Market will be limited until a clear choice
key messages 2
Key messages (2)
  • Terminal-based solutions more accurate
    • Devices require modifications
    • implications on the size, complexity and power consumption
    • affects on the cost
  • If positioning solely within device, the role of the operator diminishes
technological implications
Technological implications
  • Sharing of information between operators, application and service providers and device vendors poses a major challenge
  • Different applications have different requirements
    • commerce transactions must be secure
    • navigational services near real-time
terminal based technologies
Terminal-based technologies

GPS

  • Measurement of signal from satellites
    • minimum 4 satellites need to be visible
  • Time of arrival of the signal used

A-GPS

  • continuously operating GPS reference network provides assistance in speed and accuracy of first fix
  • GPS drawbacks
    • urban canyon effect
    • requires all handsets to be modified
terminal based e otd
Terminal-based: E-OTD
  • Device measures signals from 3 base stations and observes the time difference
  • Device requires software update
  • Base stations need to be synchronised or location units need to be installed
  • Slightly slower response times than Cell ID
  • Active measurement by the device or base stations transmit their position and timing values by cell broadcast
network based 1
Network-based (1)
  • Cell ID
    • Fallback positioning method: no modifications required
    • Usually combined with TA  Cell ID+
  • Time of Arrival (TOA)
    • measurement of the propagation time of a signal from device to 3 LMUs
    • high investment costs
standards bodies 1
Standards bodies (1)
  • GSM Association
    • 01/2000 document on LBS service requirements
  • ETSI
    • ETSI standard GSM 03.71: functional description for location services
  • UMTS
    • 3GPP for third generation: Cell ID, GPS, IPDL-OTDOA
standards bodies 2
Standards bodies (2)
  • WAP Forum
    • work underway for standard enabling LBS for WAP
  • LIF
    • founded by Ericsson, Motorola and Nokia in 09/2000
    • to develop inter-operable LCS solution
    • generic interface for application developers
  • Bluetooth
    • defining local-positioning profile as part of future Bluetooth specification (target 2001)