Mobile computing allows transmission of data without a fixed physical connection via a computer. It involves human-computer interaction and transportation of computing during normal usage. It aims to provide useful information to clients anywhere and anytime, altering lifestyles and work methods. Key aspects include mobile communication, mobile hardware, and mobile software running on handheld devices. Mobile computing is now an indispensable part of everyday life via technologies like WiFi, cellular broadband, and cloud computing.

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