The Personal Server Changing the Way We Think About Ubiquitous Computing Roy Want, et al. / Intel Research UBICOMP 2002 Nov Seungjae Lee

2 / 13 Device capability and Mobile affordance Display/Input Capability Mobile Affordance The Personal Server Cell phones PDAs Laptops Desktops

3 / 13 The Personal Server  Features Large display Full-sized keyboard Small enough to carry  How this can be done? Large-screen PCs are everywhere! an airport a trade show a commercial district The Personal Server

4 / 13 The Personal Server No display Very limited input method High-density storage Low-power communication Short-range wireless capability

5 / 13 Contents  Introduction  Implementation< Mobile Platform System Architecture Applications and Usage Models  Architectural Issues & Future Work  Conclusion

6 / 13 Mobile Platform  No real display or keyboard  The device is only accessible via the wireless link High performance processor Low power short range radio High density storage

7 / 13 System Architecture FILE VIEWER IEXPLORER PERSONAL SERVER (Linux) ACCESS HOST (Windows XP) TCP/IP Connectivity WEBSERVER WEBDAV DISCOVERY BLUETOOTH WINDOWS XP PAN PROFILE RADIO LINUX DISCOVERY BLUETOOTH PAN PROFILE RADIO HTTP Transactions Wireless Baseband

8 / 13 Applications and Usage Models  Web browsing Mobile personal webpage Bookmarks, address book, …  Wireless file access Operates like an USB memory device  Remote control E.g. Presentation sourced from a personal server

9 / 13 Architectural Issues & Future Works  Discovery delay  Privacy & security  Adaptive user interfaces  Usage models  Power management  Distributed file systems  Mobile execution  Industrial design

10 / 13 Conclusion  Utilizing computers in the local environment Considerably improves the mobile user experience Allows the mobile device itself to disappear from a users interaction  Enabling factors High-density portable storage devices Low-power, high-performance processors Short-range, low power wireless standards Extensive public computing infrastructure

11 / 13 This paper was published in JUNE 2002

12 / 13 Then how’s the personal server NOWADAYS?

13 / 13 The Personal Server, Practically  Main limitation Computers must be equipped with wireless device.  The alternatives energy deployment EnvironmentSolution Without Internet accessUSB drive With Internet accessWeb Service With RICH Internet accessWindows Terminal Service An energy barrier!