1/15

STEMPNU

Cyber Space vs. Ubiquitous Space

VS.

2/15

STEMPNU

Internet Space and Virtual Reality

Internet Space

Real World

user user user

Gates to Dive into Internet Space

3/15

STEMPNU

Ubiquitous Space and Augmented Reality

Cyber Space

Real World

user

user

user

user

Ubiquitous Space

AugmentedReality

Bridge to connect

Cyber space and real world

4/15

STEMPNU

Augmented Reality ?

5/15

STEMPNU

Example of Augmented Reality: Primitive One

[Bauhaus Institute]

6/15

STEMPNU

Example of Augmented Reality: Overlapping Two Realities

[INRIA]

[Univ. Rochester]

7/15

STEMPNU

Example of Augmented Reality:Pedestrian Information

8/15

STEMPNU

Example: Scenario

Detection by Sensor

RetrieveContextInformation

Provide AugmentedReality

9/15

STEMPNU

Real World

Context Awareness

Device

Augmented Reality Interaction with the real world is substantial

Context-Awareness

A Keyword of Ubiquitous Computing

10/15

STEMPNU

Context-Awareness

Context

Internal Context

Static Context(Information-Driven)

Dynamic Context(Sensor-Driven)

11/15

STEMPNU

Indoor SpaceRoad Network Space

Euclidean Space

Spatial Context-Awareness(Geographic Awareness)

SpatialContext

My Status + Location, Speed, Orientation

Geographic InformationStatic Context

Geo-SensorDynamic Context

Internal Context

Seamless Space

12/15

STEMPNU

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

13/15

STEMPNU

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

14/15

STEMPNU

Requirements

Communication Infrastructure

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)

IPv6 and Ad-Hoc Network

Cheap Price Security

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

Covergence

15/15

STEMPNU

But Not Like This !