7-1 Chapter 7- Memory System Design Chapter 7- Memory System Design
CHAPTER 7
description
Transcript of CHAPTER 7
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CHAPTER 7
Wireless, Mobile Computing and Mobile Commerce
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CHAPTER OUTLINE
7.1 Wireless Technologies7.2 Wireless Computer Networks and Internet
Access7.3 Mobile Computing and Mobile Commerce7.4 Pervasive Computing7.5 Wireless Security
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LEARNING OBJECTIVES
• Discuss the various types of wireless devices and wireless transmission media.
• Describe wireless networks according to their effective distance.
• Define mobile computing and mobile commerce.
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LEARNING OBJECTIVES (continued)
• Discuss the major m-commerce applications.• Define pervasive computing and describe two
technologies that underlie this technology.• Discuss the four major threats to wireless
networks.
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7.1 Wireless Technologies
Wireless devicesWireless Application Protocol (WAP) -
Microbrowsers -
Wireless transmission media
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Capabilities of Wireless Devices
Cellular telephony E-mail accessBluetooth Short message serviceWi-Fi Instant messagingDigital camera Text messagingGlobal positioning systemOrganizer MP2 music playerScheduler Video playerAddress book Internet accessCalculator QWERTY keyboard
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Examples of today’s wireless devicesBlackberry Curve 8900
Sony Mylo
T-Mobile MyTouch 3G
T-Mobile G1 and G2
Helio Ocean
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Wireless Transmission Media• Microwave Transmission
• Satellite transmission
– Geostationary Orbit (GEO)
– Middle Earth Orbit (MEO)
– Low Earth Orbit (LEO)
– Global Positioning System (GPS)
– Internet Over Satellite (IOS)
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Wireless Transmission Media (continued)
Radio
Satellite Radio
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Infrared
Infrared -
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7.2 Wireless Computer Networks and Internet Access
Short range wireless networks
Medium range wireless networks
Wide area wireless networks
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Short Range Wireless Networks
Bluetooth
Ultra-wideband
Near-field Communications
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Near-Field Communications in action
Near-field Communications (NFC) -
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Medium Range Wireless Networks
Wireless fidelity (Wi-Fi)
Wireless access point
Hotspot
Wireless network interface card
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Wireless Mesh Networks
Wireless Mesh Networks -
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Wide-Area Wireless Networks• Cellular Radio
– 1st Generation
– 2nd Generation
– 2.5 Generation
– 3rd Generation
• Wireless Broadband or WiMax
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7.3 Mobile Computing and Mobile Commerce
Mobile computing
Mobility
Broad reach
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Mobile Computing• The characteristics, mobility and broad reach,
create five value-added attributes that break the barriers of geography and time:– Ubiquity
– Convenience
– Instant connectivity
– Personalization
– Localization of products and services
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Mobile Commerce
• Mobile Commerce
• The development of m-commerce is driven by the following factors:
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Mobile Commerce ApplicationsFinancial Services
Mobile Banking
Wireless Electronic Payment Systems
Micropayments
Mobile (Wireless) Wallets
Wireless Bill Payments
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Intrabusiness Applications
Accessing Information – Mobile Portal
– Voice Portal
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Location-Based ApplicationsShopping from Wireless Devices
Location-based Advertising
Location-based Services
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Telemetry Applications– Technicians can use telemetry to identify
maintenance problems in equipment; Doctors can monitor patients and control medical equipment from a distance; Car manufacturers use telemetry for remote vehicle diagnosis and preventive maintenance.
• Medical
• Automotive
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7.4 Pervasive Computing• Pervasive Computing (Ubiquitous Computing
• Radio Frequency Identification (RFID)
• Wireless Sensor Networks (WSNs)
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7.5 Wireless Security
Four major threatsRogue access point
War driving
Eavesdropping
RF (Radio frequency) jamming