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Ubiquitous Computing. Nov. 15, 2006 Ki-Joune Li. Cyber Space vs. Ubiquitous Space. VS. Virtual Reality. Gates to Dive into the Internet Space. Real World. user. user. user. Ubiquitous Space vs. Internet Space. Internet Space. Real World. Augmented Reality. user. user. user.

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ubiquitous computing

Ubiquitous Computing

Nov. 15, 2006

Ki-Joune Li

ubiquitous space vs internet space

Virtual Reality

Gates to Dive into the Internet Space

Real World

user

user

user

Ubiquitous Space vs. Internet Space

Internet Space

ubiquitous space vs internet space1

Real World

Augmented

Reality

user

user

user

user

Bridge to

connect

Cyber space

and real world

Ubiquitous Space vs. Internet Space

Cyber

Space

Ubiquitous Space

ubiquitous space vs internet space2
Ubiquitous Space vs. Internet Space

Internet Computing

Ubiquitous Computing

Human-Computer Interface

Multimedia Interface

1 Computer : 1 Human

Invisible Interface

N Devices : 1 Human

System Architecture

Client-Server or

Centralized Architecture

Massive Parallelism

Reality

Virtual Reality and

Cyber Space

Augmented Reality and

Context Awareness

Mobility

Limited Mobility

Mobility

requirements of ubiquitous computing

Energy Efficiency

Tiny Hardware

Tiny Hardware

Requirements of Ubiquitous Computing

Requirements of Ubiquitous Computing

Mobility

Wireless Communication

Context-Awareness

Scalability

architecture of ubiquitous computing

Applications

Telematics, ITS

Logistics

Tourism

Home Network

Emergency

Device

Stationary Device

Mobile Device

Sensor

Actuator

Wireless Communication

CDMA, WCDMA

WiBro

WLAN

DMB

MANET

Architecture of Ubiquitous Computing

Middleware

communication infrastructure
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

communication infrastructure1

Goal : To Cover the space with Broadband Mobile Wireless Communication

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)

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

Convergence

IPv6 and Ad-Hoc Network

Cheap Price

Security

Energy Consumption

sensors and devices

Location-Awareness

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 )

Energy Consumption Problem

GPS, RFID, RTLS, etc..

scalability and real time constraint

Should be processed

in Real-Time

Scalability and Real-Time Constraint

Central Server for Contextual Information

DBstationary and mobile nodes

Dynamic

Updates ofPosition

ContextRequest

Large Number of Nodes

e.g. 1 Million Nodes

→ 1 sec/ node

Mobile

Node

Mobile

Node

Mobile

Node

Mobile

Node

middleware

3-Tiers Architecture

Client

Client

Client

Massively Distributed Environment

Middleware

Server

Server

Server

MobileNode

MobileNode

MobileNode

Middleware

Middleware

Middleware

Binding Client and Server

Middleware

Middleware

Middleware

MobileNode

MobileNode

MobileNode

Binding Mobile Nodes

Middleware

Ubiquitous Computing Architecture