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Ubiquitous GIS Part I: Basic Concepts of Ubiquitous GIS. Fall 2007 Ki-Joune Li http://isel.cs.pnu.edu/~lik Pusan National University. Plan. Part I: Basic Concepts of Ubiquitous GIS Part II: Geographic Context-Awareness Part III: Implementation Issues of Ubiquitous GIS

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ubiquitous gis part i basic concepts of ubiquitous gis

Ubiquitous GIS Part I: Basic Concepts of Ubiquitous GIS

Fall 2007

Ki-Joune Li

http://isel.cs.pnu.edu/~lik

Pusan National University

slide2
Plan
  • Part I: Basic Concepts of Ubiquitous GIS
  • Part II: Geographic Context-Awareness
  • Part III: Implementation Issues of Ubiquitous GIS
  • Part IV: Standardization Issues
part i basic concepts of ubiquitous gis
Part I: Basic Concepts of Ubiquitous GIS

Ubiquitous Computing and

Geographic Information Systems

ubiquitous space and augmented reality

Real World

Augmented

Reality

user

user

user

user

Bridge to

connect

Cyber space

and real world

Ubiquitous Space and Augmented Reality

Cyber

Space

Ubiquitous Space

example scenario
Example: Scenario

RetrieveContextInformation

Detection by Sensor

Provide AugmentedReality

context awareness

Interaction with the real world is substantial

Real World

Context-Awareness

Context Awareness

Augmented Reality

Device

A Keyword of Ubiquitous Computing

location awareness in ubiquitous computing

Node

Node

Location Awareness in Ubiquitous Computing

Where am I ?

Who are around me ?

Where will I be ?

Who will be around me ?

My location and

Nodes to collaborate with me

Location: A privileged data in UC

is location awareness enough

What can we do with this compass ?

We need a map !

Is location-awareness enough ?

Nothing but a game !!

Location-Awareness

Map: Geographic Context

context awareness1
Context-Awareness

Static Context

(Information-Driven)

Dynamic Context

(Sensor-Driven)

Context

Internal Context

spatial context awareness geographic awareness
Spatial Context-Awareness(Geographic Awareness)

Euclidean Space

Static Context

Dynamic Context

Road Network Space

Geographic Information

Geo-Sensor

Indoor Space

SpatialContext

Seamless Space

My Status +

Location, Speed, Orientation

Internal Context

issues in ubiquitous computing
Issues in Ubiquitous Computing

Tiny System

Scalability

Small Size Memory

Large number of mobile devices

Small CPU

Energy Problem

Small Screen

Communication

Heterogeneity

Limited Bandwidth

Platform

Limited Mobility

Contents

communication infrastructure
Communication Infrastructure

Wireless Communication : Fundamental Requirement

NOT Only ONE Communication : Convergence of Communication

CDMA : Currently Available

WiBro (Wireless Broadband) : Between CDMA and WLAN

WLAN : High Speed, but Limited Area

DMB : Broadcasting, One Way Communication

MANET (Mobile Ad-Hoc Network) : Without Network Infrastructure

Bluetooth : High Speed, but Very Limited Area

communication infrastructure1

Covergence

Communication Infrastructure

Requirements

Mobility : WLAN (very limited), CDMA (>250 Km/h), WiBro (>60 Km/h ?)

Bandwidth : Very Large Number of Messages due to Massive Parallelism

WLAN (>1 Mbps), CDMA( 100Kbps), WiBro ( 1Mbps)

Coverage : WLAN (100m), CDMA (1~3Km), WiBro(1Km)

IPv6 and Ad-Hoc Network

Cheap Price

Security

summary part i
Summary: Part I
  • Ubiquitous Computing Environment
    • Augmented Reality
    • Context-Awareness
  • Context-Awareness
    • Location-Awareness
    • Geographic (Spatial) Awareness
  • Issues for Ubiquitous Computing