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[10] Presentation Transcript

  • 1. Personal Server: Pervasive Computing and Beyond
  • 2. Existing Mobile Technology
    • Cell Phones
      • Small User Interface
      • Limited Input/Output
      • Reduced Processing capabilities
    • Personal Data Assistants
      • Powered Down Most of The Time
      • Little Connectivity
      • Limited User Interface
  • 3. Existing Mobile Technology
    • Notebook Computers
      • Limited Uptime due to Batteries
      • Large Size
      • Cumbersome Weight
      • Connectivity
      • PC Comparable Input and Output
  • 4. Personal Server Prototype
    • User Interface
      • Limited to a jog dial and 2 buttons
    • Input and Output
      • No significant built in input or output
      • Uses devices from the surrounding environment to keep the device itself very small
    • Data Storage
      • Enables carrying large amounts of data easily via FLASH based technologies such as Compact Flash and MicroDrives
      • Uses processing and networking capabilities from environment
  • 5. Personal Server Prototype (cont.)
    • Always On
      • Only limited connectivity by devices in the surrounding environment
    • Size, Weight
      • Same size as a deck of cards
      • Weighs only 135 grams, comparable to a wallet
    • Processing
      • Much more processing capability than other mobile devices by using processing power from devices in surrounding environment
      • Built in Processor
  • 6. Implementation
    • Storage
      • FLASH memory of 32MB and a 64MB DRAM
      • Only 16MB required for Linux based OS
      • Compact Flash Slot for memory of up to 1GB
    • Processing
      • StrongARM SA1110 processor with maximum speed at 206Mhz
      • Augmented Processing Capabilities through using devices in the environment
  • 7. Implementation (cont.)
    • Connectivity
      • Bluetooth, capable of a 723kbps maximum data rate
      • Provides a direct connection to emerging sensor networks or wearable systems
      • CompactFlash slot enables FLASH based technologies such as 802.11
    • Input/Output
      • StrongARM 1111 companion chip handles Bluetooth and CF slot input/output
      • Most user input and output done via Bluetooth on devices in environment
  • 8. Implementation (cont.)
    • Power
      • Uses a 920mAhr Li-ion battery similar to those in current cell phones
      • Processor consumes only 650mW running at 206Mhz
      • Dynamic Voltage Management allows the processor to self-regulate its processing speed and conserve considerable amount of energy while still operating instead of going into a non-active mode
      • Uses between 1 and 700 mW depending on system usage.
  • 9. Future Work . . .
    • Discovery
      • An out-of-band discovery signal to reduce power consumption and alleviate discovery traffic pollution on the radio spectrum
      • Reduction in discovery and setup time which currently takes 21 seconds
    • Privacy & Security
      • Passive Discovery to reduce personal information being broadcast
      • User Awareness of public displays or computers being used
    • Power Management
      • Further power reduction through closed loop power monitoring or mobile agents
  • 10. Future Work . . . . (cont.)
    • Adaptive UI
      • Automatically detect the type and size of display and adjust accordingly without being programmed for each one
      • Automatically detect the security and accessibility of the display and adapt the available content
    • Usage Models
      • Possible use as a central control unit for devices surrounding it like a remote control, watch, health monitoring device, wireless headsets, etc.
      • Could be used in conjunction with other prototypes or ideas such as the EasyLiving Project
  • 11. Future Work . . . . . (cont.)
    • Distributed File Systems
      • Implementing Bayou or Coda style distributed file systems to protect the data on the Personal Server if it is lost, stolen, or damaged
      • These would also facilitate automatic synchronization and migration
    • Industrial Design
      • Integration capabilities including a non obtrusive renewable recharging capability is required.
      • Example, if the personal server was embedded into a shoe, a special shoe rack for night time recharging
  • 12. Conclusions
    • Emerging Technologies
      • Emergence and abundance of wireless and mobile technologies will help facilitate the Personal Server Prototype
      • Further development of decreasing chip size, increasing chip processing power, and increasing battery lifetimes will increase the Personal Server’s potential as a true personal computer replacement
    • Mobile Awareness
      • People need to become comfortable with mobile technology and its ability to replace the existing computer paradigm
  • 13. Conclusions (cont.)
    • Suggestions
      • Abundance of private display booths in public places like a telephone booth
      • Some type of user authentication
      • Allow the Personal Server to work similar to iButton as well
      • Second CF slot for both memory and future expansion
  • 14. Conclusions (cont..)
    • Problems
      • When multiple devices present in environment, lack of user discretion
      • Limited to Bluetooth
      • User input on whether or not to connect to devices
      • Possible LCD display for device selection
      • Full power drain?
  • 15. Q&A
    • Questions?