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Level 144

Wireless, Mobile Computing & Mobile Commerce II


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Wireless devices:
are small enough to easily carry or wear, have sufficient computing power to perform productive tasks and can communicate wirelessly with the Internet and other devices.
microwave transmission
A wireless system that uses microwaves for high-volume, long-distance, point-to-point communication.
satellite transmission
A wireless transmission system that uses satellites for broadcast communications.
Geostationary (GEO)
orbits 22,300 miles directly above the equator and maintains a relatively fixed position in relation to a dish on earth; excellent for TV signals
Medium-earth-orbit (MEO)
are located 6,000 miles above the earth's surface and move; used for the GPS system.
Low-earth-orbit (LEO)
are 400 to 700 miles above the surface, so they move much faster with respect to a point on the earth's surface; require many to cover the earth.
Global Positioning System
a wireless system that uses MEO satellites to enable users to determine
Internet over satellite
allows users to access the Internet via GEO satellites from a dish mounted
radio transmission
Uses radio-wave frequencies to send data directly between transmitters and receivers.
Satellite radio
offers uninterrupted, near CD-quality music your radio from space
infrared
A type of wireless transmission that uses red light not usually visible to human eyes.
Short-range
wireless networks generally have a range of 100 feet or less.
Medium-range
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
Bluetooth
A personal wireless network protocol. IT enables wireless communication between input devices and computers and among other devices within 10 meters
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.
Wireless Fidelity
An Ethernet-compatible network that transmits data as radio waves.
Wireless access point
a transmitter with an antenna
Wireless network interface card
enables mobile devices to communicate wirelessly
MiFi
is a small, portable, wireless device that provides users with a permanent Wi-Fi hotspot wherever they go.
Wireless mesh networks
use multiple Wi-Fi access points to create a wide-area network that can be very large.
Cellular Radio
use radio waves to provide two-way communication
Wireless Broadband
access range up to 31 miles and data-transfer rate up to 75 Mbps
mobile computing
A real-time connection between a mobile device and other computing environments, such as the Internet or an intrane
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
Ubiquity
: mobile device can provide information and communications regardless of user's location
Convenience
Internet-enabled mobile device makes it easy and fast to
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.
Mobile commerce
refers to electronic commerce transactions that are conducted in a
Financial Services
include banking, wireless payments, micropayments, wireless wallets, bill-payment services, brokerage services, and money transfers.
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.
mobile portal
A portal that aggregates and provides content and services for mobile users.
voice portal
A Web site with an audio interface.
Telemetry
is the wireless transmission and receipt of data gathered from remote sensors.
Telemedicine
Form of long-distance health care where health-care professionals in separate locations conduct live conferences on the computer.
Pervasive Computing
(Ubiquitous computing) is invisible "everywhere computing" that is
Radio frequency identification
(RFID) technology allows manufacturers to attach tags with antennas and computer chips on goods and then track their movement through radio signals.
Wireless sensor networks
(WSNs) are networks of interconnected, battery-powered, wireless sensors that are placed into the physical environment
Rogue access point
is an unauthorized access point to a wireless network.
War driving
is the act of locating WLANs while driving around a city or elsewhere.
RF (Radio frequency) jamming
is when a person or a device intentionally or unintentionally interferes with your wireless network transmissions.
Eavesdropping
refers to efforts by unauthorized users to try to access data traveling over wireless networks.