Term
|
Definition
| 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. |
|
|
Term
| 2. Microwave transmission systems |
|
Definition
| are widely used for high-volume, long-distance, point-to-point communication. Point-to-point has two characteristics: first, the transmitter and receiver must be in view of each other (called line-of-sight); and second, the transmission itself must be tightly directed from transmitter to receiver. |
|
|
Term
| 3. Satellite transmission |
|
Definition
| systems make use of communication satellites; three types of satellites,each in a different orbit: |
|
|
Term
|
Definition
| 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. |
|
|
Term
| 5. Medium-earth-orbit (MEO) |
|
Definition
| are located 6,000 miles above the earths surface and move; used for the GPS system. |
|
|
Term
|
Definition
| are 400 to 700 miles above the surface, so they move much faster with respect to a point on the earths surface; require many to cover the earth. |
|
|
Term
| 7. Global Positioning System |
|
Definition
| a wireless system that uses MEO satellites to enable users to determine their position anywhere on the earth. |
|
|
Term
| 8. Internet over satellite |
|
Definition
| allows users to access the Internet via GEO satellites from a dish mounted on the side of their homes. |
|
|
Term
|
Definition
| uses radio-wave frequencies to send data directly between transmitters and receivers. |
|
|
Term
| 10. Satellite radio (digital radio) |
|
Definition
| 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. |
|
|
Term
|
Definition
| 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. |
|
|
Term
| 12. Short-range wireless networks |
|
Definition
| generally have a range of 100 feet or less. |
|
|
Term
| 13. Medium-range wireless networks |
|
Definition
| are the familiar wireless local area networks (WLANs). |
|
|
Term
| 15. Wide-area wireless networks |
|
Definition
| connect users to each other and to the Internet over geographically dispersed distances. |
|
|
Term
|
Definition
| Can link up to eight devices within a 30-foot area and transmit up to 2.1 megabits per second. |
|
|
Term
|
Definition
| high-bandwidth wireless technology with transmission speeds in excess of 100 megabits per second. |
|
|
Term
| 18. Near-field Communications |
|
Definition
| shortest range of any wireless network; designed to be embedded in mobile devices such as cell phones and credit cards. |
|
|
Term
| 19. Near-field communications (NFC) |
|
Definition
| 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). |
|
|
Term
| 20. Wireless fidelity (Wi-Fi) |
|
Definition
| used in wireless local area networks |
|
|
Term
| 21. Wireless access point |
|
Definition
| a transmitter with an antenna |
|
|
Term
|
Definition
| a geographical perimeter with in which a wireless access point provides wireless access for users |
|
|
Term
| 23. Wireless network interface card |
|
Definition
| enables mobile devices to communicate wirelessly. |
|
|
Term
|
Definition
| is a small, portable, wireless device that provides users with a permanent Wi-Fi hotspot wherever they go. |
|
|
Term
| 25. Wireless mesh networks |
|
Definition
| use multiple Wi-Fi access points to create a wide-area network that can be very large. |
|
|
Term
|
Definition
| use radio waves to provide two-way communication |
|
|
Term
|
Definition
| analog signals and low bandwidth |
|
|
Term
|
Definition
| digital signals for voice and data communication up to 10 Kbps |
|
|
Term
|
Definition
| digital voice and data communication up to 144 Kbps |
|
|
Term
|
Definition
| 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 |
|
|
Term
|
Definition
| 100 Mbps for high- mobility communications and 1Gbps for low-mobility applications. |
|
|
Term
| 32. Wireless Broadband or WiMax |
|
Definition
| access range up to 31 miles and data-transfer rate up to 75 Mbps |
|
|
Term
|
Definition
| refers to real-time, wireless connection between a mobile device and other computing environments, such as the Internet and an intranet. |
|
|
Term
|
Definition
| users carry a mobile device and can initiate a real-time contact with other systems from wherever they happen to be. |
|
|
Term
|
Definition
| users can be reached instantly when they carry an open mobile device. |
|
|
Term
|
Definition
| mobile device can provide information and communications regardless of users location. |
|
|
Term
| 37. Convenience and Instant Connectivity |
|
Definition
| 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. |
|
|
Term
|
Definition
| information can be customized and sent to individual consumers (e.g., as a short message service). |
|
|
Term
| 39. Localization of products and services |
|
Definition
| knowing a users location helps companies advertise their products and services. |
|
|
Term
|
Definition
| refers to electronic commerce transactions that are conducted in a wireless environment, especially via the Internet. |
|
|
Term
| 41. Shopping from Wireless Devices |
|
Definition
| online vendors allow customers to shop from wireless devices. |
|
|
Term
| 42. Location-based Advertising |
|
Definition
| is when 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. |
|
|
Term
| 43. Location-based Services |
|
Definition
| provide information to customers about local services and conditions via cell phones. |
|
|
Term
|
Definition
| include banking, wireless payments, micropayments, wireless wallets, bill-payment services, brokerage services, and money transfers. |
|
|
Term
|
Definition
| 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. |
|
|
Term
| 46. Wireless Electronic Payment Systems |
|
Definition
| these systems transfer mobile phones into secure, self-contained purchasing tools capable of instantly authorizing payments over the cellular network. |
|
|
Term
|
Definition
| electronic payments for small purchase amounts (generally less than $10). |
|
|
Term
| 48. Mobile (Wireless) Wallets |
|
Definition
| technologies that allow cardholders to make purchases with a single click from their mobile devices. |
|
|
Term
| 49. Wireless Bill Payments |
|
Definition
| Services provided by banking institutions that allow customers to pay their bills directly from their cell phones. |
|
|
Term
|
Definition
| aggregates and provides content and services for mobile users that include news, sports, email, entertainment, travel and restaurant information; community services; and stock trading. |
|
|
Term
|
Definition
| is a Web site with an audio interface and can also be accessed through a standard phone or cell phone. |
|
|
Term
|
Definition
| is the wireless transmission and receipt of data gathered from remote sensors. |
|
|
Term
|
Definition
| is the use of modern telecommunications and information technologies to provide clinical care to individuals located at a distance and for the transmission of information to provide that care. |
|
|
Term
| 54. Pervasive Computing (Ubiquitous computing) |
|
Definition
| 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) |
|
|
Term
| 55. Radio frequency identification (RFID) |
|
Definition
| technology allows manufacturers to attach tags with antennas and computer chips on goods and then track their movement through radio signals. |
|
|
Term
| 56. Wireless sensor networks (WSNs) |
|
Definition
| are networks of interconnected, battery-powered, wireless sensors that are placed into the physical environment. |
|
|
Term
|
Definition
| is an unauthorized access point to a wireless network. |
|
|
Term
|
Definition
| is the act of locating WLANs while driving around a city or elsewhere. |
|
|
Term
|
Definition
| refers to efforts by unauthorized users to try to access data traveling over wireless networks. |
|
|
Term
| 60. RF (Radio frequency) jamming |
|
Definition
| is when a person or a device intentionally or unintentionally interferes with your wireless network transmissions. |
|
|
