information technology foundations-bit 112 chapter 7 wireless, mobile computing and mobile commerce
TRANSCRIPT
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Information Technology Foundations-BIT 112
CHAPTER 7
Wireless, Mobile Computing and Mobile Commerce
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Chapter Outline
• 7.1 Wireless Technologies
• 7.2 Wireless Computer Networks and InternetAccess
• 7.3 Mobile Computing and Mobile commerce
• 7.4 Pervasive Computing
• 7.5 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.
• 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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Chapter Opening Case P. 200
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Chapter Opening Case (continued)
Disconnect?
Manufacturers
Retailers
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7.1 Wireless Technologies
• Wireless devices– Devices small enough to easily carry or wear, have
sufficient computing power to perform productive tasks and can communicate wirelessly with the Internet.
• Wireless Application Protocol (WAP) – The standard that enables wireless devices to access Web-
based information and services.
• Microbrowser– Internet browser with a small file size that can work within
the confines of the small screen sizes found on wireless devices and the relatively low bandwidths of wireless networks.
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Browser vs. Early Microbrowser
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Deepfish Microbrowser
• As wireless devices become more powerful, they have browsers with more functionality, such as Deepfish from Microsoft Labs.
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Apple iPhone with Safari browser
• The Apple iPhone is a wireless device (smart phone) that is powerful enough to run the full-function Apple Safari browser.
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Capabilities of Wireless Devices
• Cellular telephony
• E-mail access
• Bluetooth
• Short message service
• Wi-Fi
• Instant messaging
• Digital camera
• Text messaging
• Global positioning system
• Organizer
• MP2 music player
• Scheduler
• Video player
• Address book
• Internet access
• Calculator
• QWERTY keyboard
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Examples of today’s wireless devices
Blackberry Curve Treo 750
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Examples of today’s wireless devices (continued)
Motorola QHelio Ocean
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Examples of today’s wireless devices (continued)
Nokia N95
HTC Touch Dual
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Examples of today’s wireless devices (continued)
Samsung i620 Nokia E90
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Wireless Transmission Media – Table 7.1 P 204
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Satellite Footprint Comparison
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Satellite Footprint Comparison – Table 7.2 Page 205
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Global Star LEO Coverage
• Global Star is the leading provider of satellite phone service with its low-earth orbit (LEO) constellation of satellites. The image shows the company’s coverage of the earth.
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How the Global Positioning System Works
• GPS is supported by 24 MEO satellites that are shared worldwide.
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Wireless Transmission Media - Radio
• Radio transmission uses radio-wave frequencies to send data directly between transmitters and receivers.
• Satellite Radio (digital radio) – offers uninterrupted, near CD-quality music that is beamed
to your radio from space. XM satellite radio and Sirius have agreed to merge as of mid-2007.
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Wireless Transmission Media - Infrared
• Infrared light is red light that is not commonly visible to human eyes; common uses are in remote control units for TVs, VCRs, DVDs, CD players.
• You can use the digital camera on your cell phone to see if your TV remote control is working.
A test to see if your TV remote control is working.
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7.2 Wireless Computer Networks and Internet Access
• Short-range wireless networks – Generally have a range of 100 feet or less.
• Medium-range wireless networks – Are the familiar wireless local area networks (WLANs).– The most common type of medium-range wireless network
is Wireless Fidelity (Wi-Fi).
• Wide-area wireless networks – Connect users to each other and to the Internet over
geographically dispersed distances.
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Wireless Computer Networks and Internet Access
NETWORK TYPE SUB-TYPE MAXIMUM TRANSMISSION SPEED
MAXIMUM RANGE
Short Range Networks
Bluetooth 2.1 Mbps (megabits per second)
10 Meter
Ultra-wideband (UWB) 100 Mbps 60 Centimeters
Near-Field Communication 424 Kbps ~20 Centimeters
Medium Range Networks
Wireless Fidelity (Wi-Fi) 300 Mbps 600 Feet
Wireless Mesh Networks Node dependent Node dependent
Wide-Area Wireless Networks
Cellular Radio 384 Kbps – 2Mbps (3G) 25 miles
Wireless Broadband/ WiMax 75 Mbps 31 miles
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*Short Range Wireless Networks
• Bluetooth– Can link up to eight devices within a
30-foot area and transmit up to 2.1 megabits per second.
• Ultra-wideband– High-bandwidth wireless technology
with transmission speeds in excess of 100 megabits per second.
• Near-field Communications– shortest range of any wireless
network; designed to be embedded in mobile devices such as cell phones and credit cards.
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Short Range Wireless Networks-Bluetooth
• Can link up to eight devices within a 30-foot area and transmit up to 2.1 megabits per second.
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Short Range Wireless Networks- Ultra-Wideband (UWB)
• High-bandwidth wireless technology with transmission speeds in excess of 100 megabits per second.
• Ultra-wideband has many uses as you can see at the TimeDomain Web site.
• This article discusses the use of UWB in fire-fighting.
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Short Range Wireless Networks-Near-Field Communications
• Shortest range of any wireless network; designed to be embedded in mobile devices such as cell phones and credit cards.
• Near-field communications (NFC) is the enabling technology behind (a) contactless payments with credit cards and (b) the substitution of a cell phone for a credit card (the wave of the future).
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The Nokia 6131 phone
This video shows the Nokia 6131 phone in action.
The Nokia 6131 NFC-enabled phone, which is used in the video
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*Medium Range Wireless Networks
• Medium-range wireless networks are the familiar wireless local area networks (WLANs).
• The most common type of medium-range wireless network is Wireless Fidelity (Wi-Fi).
• Wireless fidelity (Wi-Fi)– Wireless access point
• a transmitter with an antenna– Hotspot
• A geographical perimeter with in which a wireless access point provides wireless access for users
– Wireless network interface card
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Diagram of wireless hotspot
• The irregularity of the hotspot is a result of intervening buildings, trees, etc.
• Note the protrusions generally follow streets.
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Diagram of wireless hotspot – 3D View
• Wi-Fi hotspots are three-dimensional and thus, roughly spherical, depending on buildings, trees, etc that weaken the signal.
• This image shows a schematic of a wireless hotspot at the Moscone Convention Center in San Francisco. It is a sphere with a radius of about 100 meters.
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Medium Range Wireless Networks- Wireless Mesh Networks
• Wireless mesh networks use multiple Wi-Fi access points to create a wide-area network that can be very large.
• A series of interconnected local area networks.
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Example of a mesh network
A mesh network from Meraki and one node
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Wide-Area Wireless Networks
• Cellular Radio: use radio waves to provide two-way communication– 1st Generation: analog signals and low bandwidth.– 2nd Generation: digital signals for voice and data
communication up to 10 Kbps.– 2.5 Generation: digital voice and data communication up to
144 Kbps.– 3rd Generation: digital voice and data communication up to
384 Kbps when device is moving at walking pace; 128 Kbps when moving in car; and 2Mbps when device is stationary.
• Wireless Broadband or WiMax: access range up to 31 miles and data-transfer rate up to 75 Mbps.
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Wide-Area Wireless Networks- Cellular Radio Network
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University of Phoenix stadium (IT’s About Business 7.1) P. 212
• The stadium uses a distributed antenna system, where relatively low-power antennas are place throughout the facility, rather than having a few high-powered antennas.
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Wi-Fi and Wi-Max in Rhode Island (IT’s About Business 7.2) P. 212
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7.3 Mobile Computing and Mobile Commerce
• Mobile computing– Refers to real-time, wireless connection between a mobile
device and other computing environments, such as the Internet and an intranet.
– Has two major characteristics that differentiate it from other forms of computing:• Mobility
– Users carry a mobile device and can initiate a real-time contact with other systems from wherever they happen to be.
• Broad reach– Users can be reached instantly when they carry an
open mobile device.
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Mobility And Broad Reach
• Create four value-added attributes that break the barriers of geography and time:– Ubiquity: mobile device can provide information and
communications regardless of user’s location.– Convenience and Instant Connectivity: Internet-enabled
mobile device makes it easy and fast to access the Web, intranets, and other mobile devices without booting up a PC or placing a call.
– Personalization: information can be customized and sent to individual consumers (e.g., as a short message service).
– Localization of products and services: knowing a user’s location helps companies advertise their products and services.
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Mobile Commerce
• Electronic commerce transactions that are conducted in a wireless environment, especially via the Internet.
• The development of Mobile Commerce (m-commerce) is driven by the following factors:– Widespread availability of mobile devices– No need for a PC– The “Cell phone culture”– Declining prices– Bandwidth improvement
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Example of Mobile Commerce
• Speedpass is a keychain RFID device.
• When you buy your gas, you simply “wave” your Speedpass near the reader on the gas pump and your credit card is debited.
Car key and the Speedpass
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Example of Mobile Commerce
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Mobile Commerce Applications
• Financial Services– Mobile Banking– Wireless Electronic Payment Systems– Micropayments– Mobile (Wireless) Wallets– Wireless Bill Payments
• Accessing Information – Mobile Portal– Voice Portal
• Location-Based Applications– Shopping from Wireless Devices – Location-based Advertising– Location-based Services
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Mobile Commerce Applications - Financial Services
• Mobile Banking: – Many banks now offer access to financial & account information, the
ability to transfer funds, and receive alerts on digital cell phones, smart phones, and PDAs.
• Wireless Electronic Payment Systems: – These systems transfer mobile phones into secure, self-contained
purchasing tools capable of instantly authorizing payments over the cellular network.
• Micropayments: – Electronic payments for small purchase amounts (generally less than $10).
• Mobile (Wireless) Wallets: – Technologies that allow cardholders to make purchases with a single click
from their mobile devices.
• Wireless Bill Payments: – Services provided by banking institutions that allow customers to pay
their bills directly from their cell phones.
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Mobile Commerce Applications - Intrabusiness Applications & Accessing Information
• Mobile Portal: – Aggregates and provides content and services for mobile
users that include news, sports, email, entertainment, travel and restaurant information; community services; and stock trading.
• Voice Portal: – Is a Web site with an audio interface and can also be
accessed through a standard phone or cell phone.
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Mobile Commerce Applications - Location-Based Applications
• Shopping from Wireless Devices – Online vendors allow customers to shop from wireless
devices.
• Location-based Advertising – Marketers know the current locations and preferences of
mobile users, they can send user-specific advertising messages to wireless devices about nearby shops, malls and restaurants.
• Location-based Services – Provide information to customers about local services and
conditions via cell phones.
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Using Google Earth in Location-based Advertising
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Other Mobile Computing - Telemedicine
Telemedicine predicted in 1924 and today
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Other Mobile Computing - Telemetry Applications
• Telemetry is the wireless transmission and receipt of data gathered from remote sensors.– 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.
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Other Mobile Computing - Automotive Telemetry
The OnStar system from GM
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The Aware System (IT’s About Business 7.3) P. 218
Telemetry in the trucking industry
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7.4 Pervasive Computing
• Pervasive Computing (Ubiquitous computing)– Is invisible “everywhere computing” that is embedded in
the objects around us – the floors, the lights, our cars, washing machine, microwave oven, cell phones, clothes, and so on. (e.g., smart home, smart appliances)
– Two technologies provide the infrastructure for pervasive computing• Radio frequency identification (RFID)• Wireless sensor networks (WSNs)
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Infrastructure For Pervasive Computing
• Radio frequency identification (RFID)– Allows manufacturers to attach tags with antennas and
computer chips on goods and then track their movement through radio signals.
• Wireless sensor networks (WSNs) – Networks of interconnected, battery-powered, wireless
sensors that are placed into the physical environment.
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Product with bar code and RFID tag
RFID tag
Bar code
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Anatomy of a Universal Product Code (UPC) a.k.a.; Bar Code
• RFID was developed to replace bar codes.
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Various RFID Tags
• One issue with RFID has been the tag cost.– today < $0.10 apiece
• Another issue, size– today typical small
size is 0.4mm x 0.4mm
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RFID Dust by Hitachi
• This image shows RFID tags produced by Hitachi that measure .05 by .05 millimeter. They are so small, that they are called RFID dust.
Human hair
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RFID and Your Privacy
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Small RFID Reader and Tag
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Small RFID Reader and Tag
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Large RFID Reader
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RuBee an RFID Alternative
• RuBee is a wireless networking protocol that relies on magnetic rather than electrical energy.
A RuBee tag
RuBee signals will go through metal and liquids, where RFID signals will not.
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RFID at Selexyz (IT’s About Business 7.4) P. 221
RFID tag on book
RFID reader at Selexyz
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Infrastructure For Pervasive Computing - Wireless Sensor Networks (WSNs)
• Networks of interconnected, battery-powered, wireless sensors called motes that are placed into the physical environment.
• The motes send information to a base computer, which connects to the satellite above.
Mote
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7.5 Wireless Security
• Four major threats– Rogue Access Point
• is an unauthorized access point to a wireless network.– War Driving
• The act of locating WLANs while driving around a city or elsewhere.
– Eavesdropping • Refers to efforts by unauthorized users to try to access
data traveling over wireless networks.– RF (Radio frequency) Jamming
• Is when a person or a device intentionally or unintentionally interferes with your wireless network transmissions.
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Chapter Closing Case P. 228