User mobility and Location management Present: Chen Jen

Outline Introduction IP and mobility Location determination Location data access

Introduction

IP and mobility

Location determination

Location data access

Introduction Maintain an IP connection when roaming between network Describe handset-based and network-base to determine mobile user location. Location track approaches.

Maintain an IP connection when roaming between network

Describe handset-based and network-base to determine mobile user location.

Location track approaches.

Outline Introduction IP and mobility Location determination Location data access

Introduction

IP and mobility

Location determination

Location data access

IP and mobility Introduction Mobile IP packet routing Agent discovery and registration

Introduction

Mobile IP packet routing

Agent discovery and registration

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

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

Introduction(2) New version is IPv6 It is 128bits Mobile operators are strong advocate the IPv6

New version is IPv6

It is 128bits

Mobile operators are strong advocate the IPv6

IP and mobility Introduction Mobile IP packet routing Agent discovery and registration

Introduction

Mobile IP packet routing

Agent discovery and registration

Mobile IP packet routing

IP and mobility Introduction Mobile IP packet routing Agent discovery and registration

Introduction

Mobile IP packet routing

Agent discovery and registration

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

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

Agent discovery and registration IPv4 need foreign agent IPv6 no need foreign agent Terminal run “ duplicate address detection ” algorithm to be assigned address

IPv4 need foreign agent

IPv6 no need foreign agent

Terminal run “ duplicate address detection ” algorithm to be assigned address

Outline Introduction IP and mobility Location determination Location data access

Introduction

IP and mobility

Location determination

Location data access

Location determination Introduction Handset-based position determination Network-based position determination

Introduction

Handset-based position determination

Network-based position determination

Introduction(1) Geocode includes Latitude Longitude Altitude Geocodes can be expressed Decimal form Nautical form

Geocode includes

Latitude

Longitude

Altitude

Geocodes can be expressed

Decimal form

Nautical form

Introduction(2)

Introduction(3) Nautical form: 42 º2’47”N 87º41’40”W Decimal form: Latitude 42.04635 Longitude -8769454

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)

Three wireless location technologies for 3G network

Cell-ID-based method

Observed Time Difference of Arrival (OTDOA)

Assisted Global Positioning System (A-GPS)

Location determination Introduction Handset-based position determination Network-based position determination

Introduction

Handset-based position determination

Network-based position determination

Handset-based position determination Use mobile terminal to compute position OTDOA positioning GPS positioning

Use mobile terminal to compute position

OTDOA positioning

GPS positioning

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

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

OTDOA positioning(2)

Handset-based position determination Use mobile terminal to compute position OTDOA positioning GPS positioning

Use mobile terminal to compute position

OTDOA positioning

GPS positioning

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

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

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)

GPS main errors are

Signal propagation delays

Multipath fading

More accurate position computations were introduced

Differential GPS (D-GPS)

Assisted GPS (A-GPS)

GPS positioning(3) D-GPS

GPS positioning(4) A-GPS

Location determination Introduction Handset-based position determination Network-based position determination

Introduction

Handset-based position determination

Network-based position determination

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

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

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

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

Network-based position determination(3)

Outline Introduction IP and mobility Location determination Location data access

Introduction

IP and mobility

Location determination

Location data access

Location data access (1) Standard location immediate service Emergency location immediate service Standard location reporting service Emergency location reporting service Triggered location reporting service

Standard location immediate service

Emergency location immediate service

Standard location reporting service

Emergency location reporting service

Triggered location reporting service

Location data access (2) POI =Point of interest