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New Technologies

New Technologies. Wireless Communication Really Personal Computers Network Object-Oriented Processing The Changing Internet The Next Big Thing. Wireless Communication. Site Wireless Networking 802.11 For large site networks with many stations Bluetooth

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New Technologies

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  1. New Technologies Wireless Communication Really Personal Computers Network Object-Oriented Processing The Changing Internet The Next Big Thing

  2. Wireless Communication • Site Wireless Networking • 802.11 • For large site networks with many stations • Bluetooth • For a few devices close to one another • Personal area networking • May Interfere with Each Other if Both are Implemented

  3. Wireless Communication • Metropolitan Wireless Networking • For an urban area • Exists now, but slow (around 9,600 bps) • Soon 100 kbps • Megabit (up to 3 Mbps) services coming • Will make notebooks, etc. far more useful • Satellite Wireless Networking • Megabit speeds anywhere

  4. Wireless Communication • Cellular Systems • Service area is broken up into several small areas called cells

  5. Wireless Communication • Cellular Systems • Within each cell, there is a cellsite that transmits to and receives from cellular devices Cellsite

  6. Wireless Communication • Cellular Systems • Channel reuse. Channels can be reused in non-adjacent cells Yes No Can Reuse Ch. 232? Uses Channel 232 No No Yes Yes No No Channel 232 Used in 4 cells No

  7. Wireless Communication • Cellular Systems • Channel reuse is very important because available frequencies are very limited

  8. Wireless Communication • The Wireless Revolution • New freedom for users • Anything, anytime, anywhere • Likely to spawn new applications

  9. Really Personal Computing • Both Desktop PCs and Notebook PCs are Large • This limits their portability

  10. Really Personal Computing • Many Future Access Devices Will be Smaller • Personal digital assistants (PDAs) • Cellphones • Etc.

  11. Really Personal Computing • New “Form Factors” • Size and shape

  12. Cellphone Access • Cellphones will be Very Popular for Internet Access • Cellphones are very widespread • In Japan, the number of cellphones passed the number of wired phones in early 2000 • This is happening in other countries aswell • The U.S. is somewhat behind becauseit did not settle on the world cellphonestandard, GSM

  13. Cellphone Access • Cellphones will be Very Popular for Internet Access • Almost all cellphones are now being built with Internet access capability • International Data Corporationpredicts that by the end of 2002there will be more wirelessdevices accessing the Internetthan wired devices; cellphoneswill be the most popular

  14. Cellphone Access • Starting to have small displays capable of showing a few lines of data • Good for short messages • Good for data retrieval ifquery is very targeted • May be supplemented with voicegeneration so that cellphones canspeak the answer

  15. Cellphone Access • Wireless Access Protocol (WAP) • Emerging standard for cellphone web access • Also for other small devices, such as personal digital assistants (PDAs)

  16. Cellphone Access • Wireless Markup Language (WML) • Way of formatting webpagesfor small displays • Simpler than HTML • Reformatting may be expensive • Part of WAP

  17. Cellphone Access • Wireless Access Protocol (WAP) • Device will communicate over the Internet with WAP server via WAP protocols rather than with webservers directly WAP Protocols WAP Protocols Wireless Carrier WAP Server

  18. Cellphone Access • Wireless Access Protocol (WAP) • WAP server may get content from full webserver using full webservice protocols (HTTP, TCP), probably translating webpages to WML Webservice Protocols Wireless Carrier WAP Server Full Webserver

  19. The Problem of Input • Keyboards • Cannot be too small and still allow typing • Voice Input • Not very accurate, especially inreal (noisy) environments • Not private

  20. Network Object-Oriented Processing • Traditional Object-Oriented Programming • Programs consist of many objects (forms, buttons, etc.) • Objects send messages to one another to ask others to do certain tasks by executingmethods Message OBJ OBJ OBJ OBJ

  21. Network Object-Oriented Processing • Network Object-Oriented Programming (NOOP) • Objects can run on multiple machines • Still communicate by sending messages OBJ Message OBJ OBJ OBJ OBJ OBJ

  22. Network Object-Oriented Processing • NOOP takes advantage of available capacity on computers on the network • If computer has idle capacity, it will be sent objects OBJ OBJ OBJ OBJ OBJ OBJ

  23. Network Object-Oriented Processing • NOOP Standards are Needed for Object-Object Communication • Microsoft’s standards are DCOM and .NET • CORBA is a competing consortium standard OBJ OBJ OBJ OBJ OBJ OBJ

  24. The Changing Internet • Today’s Internet • Throughput is too low • Delays (Latencies) are too long • Reliability is too slow • Need a “Business Class Internet” • Faster • Lower Latency • High reliability

  25. The Changing Internet • Two Classes of Service? • Regular versus Business Class? • Haves versus Have-Nots?

  26. The Changing Internet • Speeds • Gigabit to the desktop • Will make entirely new applications possible • Internet2 (Abeline)

  27. The Next Big Thing • The PC Revolution of the 1980s was not anticipated • The Internet Revolution of the 1990s was not anticipated • Will the future simply be an extension of the past, or will there be a Next Big Thing?

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