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Mobile computing

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Transcript

  • 1. Mobile Computing
  • 2. Definition
    • A technology that allows transmission of data, via a computer, without having to be connected to a fixed physical link.
    • ( Koudounas and Iqbal)
  • 3. Introduction
    • Emerging technology with intercross of many subjects.
    • Human–computer interaction to be transported during normal usage.
    • Hotspot in computing technology sector
    • One of the four far-reaching implications technologies.
    • New technology grwoing up with mobile communication, Internet, database, distributed computing...
  • 4. Purpose
    • Provide any clients at any time in any location with useful, accurate and timely information.
    • Altering people's life style and working method drastically.
  • 5. Aspects
    • Mobile communication
    • Mobile hardware
    • Mobile software
  • 6. Mobile communication
    • Communication between moving body, or moving body and fixed objects.
    • Features:
      • Mobility.
      • Complicated to propagate radio wave.
      • Severe noise and interference.
      • Complex system and network configuration.
  • 7. Mobile hardware Mobile software
  • 8. Mobile software
    • Run on handheld computers, PDAs, EDAs, smartphones and cellphones.
    • Popularity of these platforms has risen considerably since the first handheld computers invented in 1980s.
  • 9. Mobile computing
    • Portable technologies.
    • Internet access on the go.
    • Laptops, PDAs, standard cell phones.
    • Indispensable way of life.
  • 10. WiFi
    • Common, cheap
    • Radio waves used to broadcast Internet signal from wireless router.
    • Anyone can jump on if not encrypted.
    • Commonly used in public places to create hotspot.
    • Hotspot must be located, stay put within broadcasting range.
  • 11. Cellular broadband
    • Cellular modem or AirCard used to connect to cell towers.
    • AirCard fits into PC Card or ExpressCard slot, delivering Internet access on the go.
    • Needn’t remain stationary as signal remain strong.
    • Cell phones and PDAs also use it.
    • Access considered premium service which increases cost.
  • 12. Others
    • Cloud computing.
    • Use website services from mobile computers.
    • Access to a company’s VPN by tunneling through Internet.
  • 13. Importance
    • Increasing business value.
    • Staying connected.
    • Email to Facebook, Skype to socializing sites, cloud computing to VPNs,
    • No longer do without mobile computing anymore.
  • 14. Future
    • Wireless connect and pocket PC
    • Balance between autonomy and interdependence
    David Krebs, analyst, VDC introduced how mobile computing involved in next 10 years http://www.youtube.com/watch?v=-MnX6zJzKIU&feature=player_embedded
  • 15. Challenge and Suggestion
    • 1. Constraints for Mobility
    •  
    • Mobile components are resource-poor relative to static elements.
    • Mobility is essentially hazardous
    • Mobile connection is highly flexible in performance and variability.
    • Mobile computing is interdependent on energy source
    • It requires us to rethink the traditional  approaches to information access.
  • 16.
    • 2. Extended Client-Server Model
    • Security
    • System
    • Rethinking and extending
    • May suffer temporarily blurring
    Temporary Blurring of Roles resource-rich server and certain connectivity security and system administration changes
  • 17.
    • 3. Reliability in Presence of Disconnection
    •   WiMAX (Ease of Use)
    • - Worldwide Interoperability for Microwave Access
    • - June 2001
    • - High speed internet access and flexible ease of use
    • - Current :120 Mb-it/s downlink and 60 Mb-it/s up-link per site 
    • - Release 2 expected to be commercial in 2011-2012
  • 18.
    • 4. Security and Privacy  
    • Payment, E-agency, E-currency
    • Cyber-crime
    • The way mobile security is developing as:
    •      1.  Authentication
    • Access to documents
    • Handling of personal information
    • Privacy safeguard
    • 2.  Authorization
    • Requires high supervision from servers to clients. 
    • 3.  Encryption
    • Decryption
  • 19.
    • 5. Battery Technology
    • faster processors with mutil-cores and high-end graphic card
    • battery power
    • cloud computing
    • faster, safer, elastic and full-managed

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