Part j technology
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Part J: Technology. Pasi Pekkinen [email protected] 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

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Part j technology

Part J:Technology

Pasi Pekkinen

[email protected]

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


Technology comparison

Technology comparison


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)


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