1. Cyber Space vs. Ubiquitous Space

2. Internet Space and Virtual Reality
Gates to Dive into Internet Space
Real World
user

3. Ubiquitous Space and Augmented Reality
Cyber
Space
Real World
user
Augmented
Reality
Ubiquitous Space
Bridge to
connect
Cyber space
and real world

4. Augmented Reality ?

5. Example of Augmented Reality: Primitive One
[Bauhaus Institute]

6. Example of Augmented Reality: Overlapping Two Realities
[Univ. Rochester]
[INRIA]

7. Example of Augmented Reality: Pedestrian Information

8. Example: Scenario Retrieve Context Information Detection by Sensor
Provide Augmented Reality

9. 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

10. (Information-Driven)
Context-Awareness
Static Context
(Information-Driven)
Dynamic Context
(Sensor-Driven)
Context
Internal Context

11. 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

12. 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

13. 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

14. 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

15. But Not Like This !