1. CHAPTER 7 Wireless, Mobile Computing and Mobile Commerce

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

3. Wireless Devices and Media TelephonyMusic/Video player TextingTextingDigital camera Web/EmailPoint-of-Sale terminal? Apps, Apps, Apps Apps, Apps, Apps … GPS Organizer/scheduler QWERTY keyboard Device Capabilities 3 Martin Cooper: Inventor of the cellphone

4. Microbrowsers in Wireless Devices Opera Mobile iPhone Safari 4

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 5

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

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

8. Short Range: Near-Field Communications 8

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

10. Wi-Fi Coverage at CSUN 10

11. 11 Long Range: Cellular Radio Communication

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

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 13

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

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.orgen.wikipedia.org 15

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 16 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) 17

18. Wikitude: Aumented Reality 18

19. Location-based advertising Digital screen 19

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) 20

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

22. Various RFID Tags and a Reader 22

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

24. Wireless Sensor Networks (WSNs) Mote 24

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

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

27. Geosynchronous Earth Orbit 27

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