Ubiquitous GIS Part I: Basic Concepts of Ubiquitous GIS
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Transcript of Ubiquitous GIS Part I: Basic Concepts of Ubiquitous GIS
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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
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Plan
Part I: Basic Concepts of Ubiquitous GIS Part II: Geographic Context-Awareness Part III: Implementation Issues of Ubiquitous GIS Part IV: Standardization Issues
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Part I: Basic Concepts of Ubiquitous GIS
Ubiquitous Computing and
Geographic Information Systems
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Cyber Space vs. Ubiquitous Space
VS.
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Internet Space and Virtual Reality
Internet Space
Real World
user user user
Gates to Dive into Internet Space
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Ubiquitous Space and Augmented Reality
Cyber Space
Real World
user
user
user
user
Ubiquitous Space
AugmentedReality
Bridge to connect
Cyber space and real world
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Augmented Reality ?
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Example of Augmented Reality: Primitive One
[Bauhaus Institute]
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Example of Augmented Reality: Overlapping Two Realities
[INRIA]
[Univ. Rochester]
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Example of Augmented Reality:Pedestrian Information
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Example of Augmented Reality
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Example: Scenario
Detection by Sensor
RetrieveContextInformation
Provide AugmentedReality
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Real World
Context Awareness
Device
Augmented Reality Interaction with the real world is substantial
Context-Awareness
A Keyword of Ubiquitous Computing
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Location Awareness in Ubiquitous Computing
Node Node
Where am I ?Who are around me ?
Where will I be ?Who will be around me ?
My location andNodes to collaborate with me
Location: A privileged data in UC
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Is location-awareness enough ?
Nothing but a game !!
We need a map !
What can we do with this compass ?
Location-Awareness
Map: Geographic Context
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Context-Awareness
Context
Internal Context
Static Context(Information-Driven)
Dynamic Context(Sensor-Driven)
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Indoor Space
Road Network Space
Euclidean Space
Spatial Context-Awareness(Geographic Awareness)
SpatialContext
My Status + Location, Speed, Orientation
Geographic Information
Static Context
Geo-Sensor
Dynamic Context
Internal Context
Seamless Space
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Issues in Ubiquitous Computing
Tiny System
Small Size Memory
Small CPU
Energy Problem
Communication
Limited Bandwidth
Limited Mobility
Small Screen
Scalability
Heterogeneity
Platform
Contents
Large number of mobile devices
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Communication Infrastructure
Wireless Communication : Fundamental RequirementWireless Communication : Fundamental Requirement
NOT Only ONE Communication : Convergence of Communication NOT Only ONE Communication : Convergence of Communication
CDMA : Currently AvailableCDMA : Currently Available
WiBro (Wireless Broadband) : Between CDMA and WLANWiBro (Wireless Broadband) : Between CDMA and WLAN
WLAN : High Speed, but Limited AreaWLAN : High Speed, but Limited Area
DMB : Broadcasting, One Way CommunicationDMB : Broadcasting, One Way Communication
MANET (Mobile Ad-Hoc Network) : Without Network InfrastructureMANET (Mobile Ad-Hoc Network) : Without Network Infrastructure
Bluetooth : High Speed, but Very Limited AreaBluetooth : High Speed, but Very Limited Area
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RequirementsRequirements
Communication Infrastructure
Mobility : WLAN (very limited), CDMA (>250 Km/h), WiBro (>60 Km/h ?)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)
Bandwidth : Very Large Number of Messages due to Massive Parallelism WLAN (>1 Mbps), CDMA( 100Kbps), WiBro ( 1Mbps)
IPv6 and Ad-Hoc NetworkIPv6 and Ad-Hoc Network
Cheap PriceCheap Price SecuritySecurity
Coverage : WLAN (100m), CDMA (1~3Km), WiBro(1Km)Coverage : WLAN (100m), CDMA (1~3Km), WiBro(1Km)
CovergenceCovergence
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But Not Like This !
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Summary: Part I
Ubiquitous Computing Environment Augmented Reality Context-Awareness
Context-Awareness Location-Awareness Geographic (Spatial) Awareness
Issues for Ubiquitous Computing