CHAPTER 7 Wireless Mobile Computing and Mobile Commerce
CHAPTER 7 Wireless, Mobile Computing and Mobile Commerce
CHAPTER OUTLINE § Wireless Devices and Media § Wireless Networking Technologies § Mobile commerce § Pervasive Computing 2
Wireless Devices and Media Device Capabilities Telephony Texting Web/Email Apps, Apps … GPS Organizer/scheduler QWERTY keyboard Music/Video player Digital camera Point-of-Sale terminal? Martin Cooper: Inventor of the 3
Microbrowsers in Wireless Devices Opera Mobile i. Phone Safari 4
Wireless Communication Media n Infrared n Slow; very short range; requires line-of-sight n Laser (free space optics) n Fast, but requires line-of-sight n High-frequency Radio (900 MHz and above) n Wireless local area networks (Wi-Fi) n Cellular networks n Bluetooth (personal area networks) n Microware / Wi. Max 5
Wireless Networking Technologies § Short range § Bluetooth, Near-field communications § Medium range § Wireless LAN (Wi. Fi) § Wide area § Cellular, Wi. Max 6
Short Range: Bluetooth and Its Applications Body Area Network (BAN) Personal Area Network (PAN) Range: 30 feet 7
Short Range: Near-Field Communications 8
Medium Range: Wireless LAN (Wi-Fi) Wired LAN Medium Wireless Clients Wireless Access Points (AP) Provide Hotspots AP Range: 50 - 300 feet 9
Wi-Fi Coverage at CSUN 10
Long Range: Cellular Radio Communication 11
Long Range: Wi. Max n Worldwide Interoperability for Microwave Access (Wi. Max) Wi. MAX transmitting tower (range: 30 miles) 12
Terrestrial Microwave Radio n Used to cross inaccessible terrain or to connect buildings where cable installation would be expensive. n Antennas are about 30 miles apart n Requires line of sight 13
Satellite-based Microwave Radio n Geosynchronous Earth Orbit Satellites (GEOs) n Long propagation delays n There also Medium and Low Earth Orbit Satellites (MEOs and LEOs) 14
Application Example: GPS § Global Positioning System v 24 satellites 12, 000 miles above earth v Receivers pick up signals from at least 4 satellites v GPS receivers triangulate position using time stamps v Accuracy: as close as 10 square centimeters Source: en. wikipedia. org 15
Mobile Commerce n An extension of E-Commerce n Driven by: n Widespread availability of mobile devices n Bandwidth improvement n Popular Applications n Financial transactions n Reservations/bookings n Location-based applications Mobile wallet 16
Location-Based M-Commerce n Highly personalized mobile services n Based on location n Use GPS- or Bluetooth-enabled cell phones n Pull-based – consumers seeking information n Push-based – companies sending (unrequested) information to the consumer (hence the sellphone) 17
Wikitude: Aumented Reality 18
Location-based advertising Digital screen 19
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
Example of RFID Application Coming soon to a supermarket near you See video 21
Various RFID Tags and a Reader 22
RFID at Selexyz RFID tag on book RFID reader at Selexyz 23
Wireless Sensor Networks (WSNs) Mote 24
WSN Application Example 1: Real-time Traffic System 25
WSN Application Example 2: “Smart” Electric Grid by Visualization of home energy usage 26
Geosynchronous Earth Orbit 27
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