STEM-PNU Augmented Reality

yardbellΤεχνίτη Νοημοσύνη και Ρομποτική

14 Νοε 2013 (πριν από 4 χρόνια)

109 εμφανίσεις

1

Ubiquitous Computing

Nov. 15, 2006

Ki
-
Joune Li


STEM

Pusan National University


2

Cyber Space vs. Ubiquitous Space

VS.


STEM

Pusan National University


3

Ubiquitous Space vs. Internet Space

Internet Space

Real World

user

user

user

Gates to Dive into

the Internet Space

Virtual Reality


STEM

Pusan National University


4

Ubiquitous Space vs. Internet Space

Cyber

Space

Real

World

user

user

user

user

Ubiquitous

Space

Augmented

Reality


Bridge to

connect

Cyber space

and real world


STEM

Pusan National University


5

Ubiquitous Space vs. Internet Space

Human
-
Computer

Interface

Multimedia Interface


1 Computer : 1 Human

Invisible Interface


N

Devices : 1 Human

System Architecture

Client
-
Server or

Centralized Architecture

Massive Parallelism

Internet Computing

Ubiquitous Computing

Reality

Virtual Reality and

Cyber Space

Augmented Reality and

Context Awareness

Mobility

Limited Mobility

Mobility


STEM

Pusan National University


6

Augmented Reality ?


STEM

Pusan National University


7

Example of Augmented Reality

Case 1: Multi
-
Projector

[Bauhaus Institute]


STEM

Pusan National University


8

Example of Augmented Reality

Case 2: Surgery

[INRIA]

[Univ. Rochester]


STEM

Pusan National University


9

Example of Augmented Reality

Case 3: Pedestrian Information


STEM

Pusan National University


10

Augmented Reality !


STEM

Pusan National University


11

Requirements of Ubiquitous Computing

Requirements of Ubiquitous Computing

Mobility

Wireless Communication

Context
-
Awareness

Scalability

Energy Efficiency

Tiny Hardware

Tiny Hardware


STEM

Pusan National University


12

Architecture of Ubiquitous Computing

Wireless Communication

CDMA, WCDMA

WiBro

WLAN

DMB

MANET

Middleware

Applications

Telematics, ITS

Logistics

Emergency

Tourism

Home Network

Device

Stationary Device

Mobile Device

Sensor

Actuator


STEM

Pusan National University


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


STEM

Pusan National University


14

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(


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Goal : To Cover the space with Broadband Mobile Wireless Communication

Energy Consumption


STEM

Pusan National University


15

But Not Like This !


STEM

Pusan National University


16

Sensors and Devices

Bridge between Real World and Cyber Space

Size : From Smart Dust to PDA, Cellular Phone or PC

Wireless communication with other sensors or devices is essential

Sensor : Context
-
Awareness (Temperature, Light, Humidity, and
POSITION
)

Location
-
Awareness

GPS, RFID, RTLS, etc..

Energy Consumption Problem


STEM

Pusan National University


17

Context Awareness and Sensors


STEM

Pusan National University


18

Should be processed

in Real
-
Time

Large Number of Nodes

e.g. 1 Million Nodes


1

獥振潤e

Scalability and Real
-
Time Constraint

Central Server for Contextual Information

Mobile

Node

Dynamic

Updates of

Position

Context

Request

Mobile

Node

Mobile

Node

Mobile

Node

DB

stationary and mobile nodes


STEM

Pusan National University


19

Ubiquitous Computing Architecture

Middleware

Mobile

Node

Mobile

Node

Mobile

Node

Middleware

Middleware

Middleware

Mobile

Node

Mobile

Node

Mobile

Node

Middleware

Middleware

Middleware

3
-
Tiers Architecture

Server

Server

Server

Middleware

Client

Client

Client

Massively Distributed

Environment

Binding Client and Server

Binding Mobile Nodes


STEM

Pusan National University


20

P2P or MANET