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Cyber Space vs. Ubiquitous Space
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Internet Space and Virtual Reality
Gates to Dive into Internet Space Real World user
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Ubiquitous Space and Augmented Reality
Cyber Space Real World user Augmented Reality Ubiquitous Space 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
[Univ. Rochester] [INRIA]
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Example of Augmented Reality: Pedestrian Information
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Example: Scenario Retrieve Context Information Detection by Sensor
Provide Augmented Reality
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Interaction with the real world is substantial
Context Awareness Augmented Reality Interaction with the real world is substantial Context-Awareness Real World Device A Keyword of Ubiquitous Computing
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(Information-Driven)
Context-Awareness Static Context (Information-Driven) Dynamic Context (Sensor-Driven) Context Internal Context
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Spatial Context-Awareness (Geographic Awareness)
Euclidean Space Static Context Dynamic Context Road Network Space Geographic Information Geo-Sensor Indoor Space Spatial Context Seamless Space My Status + Location, Speed, Orientation Internal Context
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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
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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
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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) Covergence Coverage : WLAN (100m), CDMA (1~3Km), WiBro(1Km) IPv6 and Ad-Hoc Network Cheap Price Security
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But Not Like This !
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