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CHAPTER 7

CHAPTER 7. Wireless, Mobile Computing and Mobile Commerce. CHAPTER OUTLINE. Wireless Devices and Media Wireless Networking Technologies Mobile commerce Pervasive Computing. Wireless Devices and Media. Device Capabilities. Telephony Music/Video player Texting Digital camera

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CHAPTER 7

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  1. CHAPTER 7 Wireless, Mobile Computing and Mobile Commerce

  2. CHAPTER OUTLINE • Wireless Devices and Media • Wireless Networking Technologies • Mobile commerce • Pervasive Computing

  3. Wireless Devices and Media Device Capabilities Telephony Music/Video player Texting Digital camera Web/Email Point-of-Sale terminal? Apps, Apps, Apps … GPS Organizer/scheduler QWERTY keyboard Martin Cooper: Inventor of the cellphone

  4. Microbrowsers in Wireless Devices Opera Mobile iPhone Safari

  5. Wireless Communication Media • Infrared • Slow; very short range; requires line-of-sight • Laser (free space optics) • Fast, but requires line-of-sight • High-frequency Radio (900 MHz and above) • Wireless local area networks (Wi-Fi) • Cellular networks • Bluetooth (personal area networks) • Microware / WiMax

  6. Wireless Networking Technologies • Short range • Bluetooth, Near-field communications • Medium range • Wireless LAN (WiFi) • Wide area • Cellular, WiMax

  7. Short Range: Bluetooth and Its Applications Body Area Network (BAN) Personal Area Network (PAN) Range: 30 feet

  8. Short Range: Near-Field Communications

  9. Medium Range: Wireless LAN (Wi-Fi) Wired LAN Medium Wireless Clients Wireless Access Points (AP) Provide Hotspots AP Range: 50 - 300 feet

  10. Wi-Fi Coverage at CSUN

  11. Long Range: Cellular Radio Communication

  12. Long Range: WiMax • Worldwide Interoperability for Microwave Access (WiMax) WiMAX transmitting tower (range: 30 miles)

  13. Terrestrial Microwave Radio • Used to cross inaccessible terrain or to connect buildings where cable installation would be expensive. • Antennas are about 30 miles apart • Requires line of sight

  14. Geosynchronous Earth Orbit Satellites (GEOs) Long propagation delays There are also Medium and Low Earth Orbit Satellites (MEOs and LEOs) Satellite-based Microwave Radio

  15. Application Example: GPS • Global Positioning System • 24 satellites 12,000 miles above earth • Receivers pick up signals from at least 4 satellites • GPS receivers triangulate position using time stamps • Accuracy: as close as 10 square centimeters Source: en.wikipedia.org

  16. Mobile Commerce • An extension of E-Commerce • Driven by: • Widespread availability of mobile devices • Bandwidth improvement • Popular Applications • Financial transactions • Reservations/bookings • Location-based applications Mobile wallet

  17. Location-Based M-Commerce • Highly personalized mobile services • Based on location • Use GPS- or Bluetooth-enabled cell phones • Pull-based – consumers seeking information • Push-based – companies sending (unrequested) information to the consumer (hence the sellphone)

  18. Wikitude: Aumented Reality

  19. Location-based advertising Digital screen

  20. Pervasive Computing • Aka Ubiquitous Computing (Ubicomp) • Computers seem to disappear but are yet everywhere (called Everyware by Adam Greenfield) • Two infrastructure technologies for Ubicomp • Radio frequency identification (RFID) • Wireless sensor networks (WSNs)

  21. Example of RFID Application Coming soon to a supermarket near you See video

  22. Various RFID Tags and a Reader

  23. RFID at Selexyz RFID tag on book RFID reader at Selexyz

  24. Wireless Sensor Networks (WSNs) Mote

  25. WSN Application Example 1: Real-time Traffic System

  26. WSN Application Example 2: “Smart” Electric Grid by Visualization of home energy usage

  27. Geosynchronous Earth Orbit

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