User mobility and location management

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IP and mobility …

IP and mobility
Location determination
Location data access

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  • 1. User mobility and Location management Present: Chen Jen
  • 2. Outline
    • Introduction
    • IP and mobility
    • Location determination
    • Location data access
  • 3. Introduction
    • Maintain an IP connection when roaming between network
    • Describe handset-based and network-base to determine mobile user location.
    • Location track approaches.
  • 4. Outline
    • Introduction
    • IP and mobility
    • Location determination
    • Location data access
  • 5. IP and mobility
    • Introduction
    • Mobile IP packet routing
    • Agent discovery and registration
  • 6. Introduction(1)
    • IP is network interface
    • It is unique
    • Network prefix and host portion consist an IP
    • For example: IPv4 is 32bits address 128.32.17.25
    Network prefix Host portion
  • 7. Introduction(2)
    • New version is IPv6
    • It is 128bits
    • Mobile operators are strong advocate the IPv6
  • 8. IP and mobility
    • Introduction
    • Mobile IP packet routing
    • Agent discovery and registration
  • 9. Mobile IP packet routing
  • 10. IP and mobility
    • Introduction
    • Mobile IP packet routing
    • Agent discovery and registration
  • 11. Agent discovery and registration
    • Mobile terminal need listen “ agent advertisements ”
    • If no hear any things,it can issue “ agent solicitation ”
    • If no response, it can be assigned internet address by DHCP
  • 12. Agent discovery and registration
    • IPv4 need foreign agent
    • IPv6 no need foreign agent
    • Terminal run “ duplicate address detection ” algorithm to be assigned address
  • 13. Outline
    • Introduction
    • IP and mobility
    • Location determination
    • Location data access
  • 14. Location determination
    • Introduction
    • Handset-based position determination
    • Network-based position determination
  • 15. Introduction(1)
    • Geocode includes
      • Latitude
      • Longitude
      • Altitude
    • Geocodes can be expressed
      • Decimal form
      • Nautical form
  • 16. Introduction(2)
  • 17. Introduction(3) Nautical form: 42 º2’47”N 87º41’40”W Decimal form: Latitude 42.04635 Longitude -8769454
  • 18. Introduction(4)
    • Three wireless location technologies for 3G network
      • Cell-ID-based method
      • Observed Time Difference of Arrival (OTDOA)
      • Assisted Global Positioning System (A-GPS)
  • 19. Location determination
    • Introduction
    • Handset-based position determination
    • Network-based position determination
  • 20. Handset-based position determination
    • Use mobile terminal to compute position
      • OTDOA positioning
      • GPS positioning
  • 21. OTDOA positioning(1)
    • Use two pairs of cell sites to sent each corresponding time
    • Measurement use difference of arrival time to draw a hyperbolic locus
    • The intersection of the two hyperbolic loci determines position
  • 22. OTDOA positioning(2)
  • 23. Handset-based position determination
    • Use mobile terminal to compute position
      • OTDOA positioning
      • GPS positioning
  • 24. GPS positioning(1)
    • A satellite navigation system
    • Total of 24 GPS satellites
    • Only need four GPS satellites to compute position
    • Galileo will own 27 operational satellites in 2008
  • 25. GPS positioning(2)
    • GPS main errors are
      • Signal propagation delays
      • Multipath fading
    • More accurate position computations were introduced
      • Differential GPS (D-GPS)
      • Assisted GPS (A-GPS)
  • 26. GPS positioning(3) D-GPS
  • 27. GPS positioning(4) A-GPS
  • 28. Location determination
    • Introduction
    • Handset-based position determination
    • Network-based position determination
  • 29. Network-based position determination(1)
    • No require upgrades
    • Cell sites need special equipment
    • Cell identification(cell-ID) is most basic and inaccurate
    • Accuracy of cell-ID is about
      • 150 meters in urban area
      • 30 kilometers in rural areas
  • 30. Network-based position determination(2)
    • Network-based OTDOA discriminate
      • Location Measurement Units (LMUs)
      • Location Service Center (LSC)
    • LMUs record time of arrival of radio signals
    • LSC compute the LMUs hyperbolic locus and intersectional point
  • 31. Network-based position determination(3)
  • 32. Outline
    • Introduction
    • IP and mobility
    • Location determination
    • Location data access
  • 33. Location data access (1)
    • Standard location immediate service
    • Emergency location immediate service
    • Standard location reporting service
    • Emergency location reporting service
    • Triggered location reporting service
  • 34. Location data access (2) POI =Point of interest