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Ubiquitous Computing

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

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  1. Ubiquitous Computing Nov. 15, 2006 Ki-Joune Li

  2. Cyber Space vs. Ubiquitous Space VS.

  3. Virtual Reality Gates to Dive into the Internet Space Real World user user user Ubiquitous Space vs. Internet Space Internet Space

  4. 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

  5. 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

  6. Augmented Reality ?

  7. Example of Augmented RealityCase 1: Multi-Projector [Bauhaus Institute]

  8. Example of Augmented RealityCase 2: Surgery [Univ. Rochester] [INRIA]

  9. Example of Augmented RealityCase 3: Pedestrian Information

  10. Augmented Reality !

  11. Energy Efficiency Tiny Hardware Tiny Hardware Requirements of Ubiquitous Computing Requirements of Ubiquitous Computing Mobility Wireless Communication Context-Awareness Scalability

  12. 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

  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. 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

  15. But Not Like This !

  16. 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..

  17. Context Awareness and Sensors

  18. 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

  19. 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

  20. P2P or MANET

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