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Part J: Technology

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

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  1. Part J:Technology Pasi Pekkinen pasi.pekkinen@navinova.com Navinova Oy

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. Technology comparison

  9. 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

  10. 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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