Wireless, Mobile Computing & Mobile Commerce

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Across
  1. 5. a wireless access point that provides service to a number of users within a small geographical perimeter (up to approximately 300 feet).
  2. 6. virtually every object has processing power with either wireless or wired connections to a global network.
  3. 9. networks using multiple Wi-Fi access points to create a wide area network that can be quite large and are essentially a series of interconnected local area networks.
  4. 10. a medium-range WLAN.
  5. 12. a real-time, wireless connection between a mobile device and other computing environments, such as the Internet or an intranet.
  6. 13. offers uninterrupted, near CD-quality transmission that is beamed to your radio, either at home or in your car, from both GEO (XM Radio) and MEO (Sirius) satellites in space
  7. 14. networks that connect users to the Internet over a geographically dispersed territory, they typically operate over the licensed spectrum (government regulation).that is, they use portions of the wireless spectrum that are regulated by the government.
  8. 15. One major limitation of GEO satellites is that their transmissions take a quarter of a second to send and return from the earth's surface.
  9. 18. the area of Earth’s surface reached by a satellite’s transmission overcomes the limitations of microwave data relay stations. The higher a satellite orbits, the larger its footprint
  10. 19. enables peer-to-peer communications, so devices can connect directly allowing users to transfer content among devices without having to rely on a wireless antenna. It can connect pairs or groups of devices at Wi-Fi speeds of up to 250 Mbps and at distances of up to 800 feet.
Down
  1. 1. uses radio-wave frequencies to send data directly between transmitters and receivers
  2. 2. a small, portable wireless device that provides users with a permanent Wi-Fi hotspot wherever they go with a range of about 10 meters (roughly 30 feet).
  3. 3. a wireless system that utilizes satellites to enable users to determine their position anywhere on Earth. GPS is supported by 24 MEO satellites that are shared worldwide
  4. 4. e-commerce (EC) transactions conducted with a mobile device.
  5. 7. in remote parts of the world it is the only option available for Internet connections because installing cables is either too expensive or physically impossible.
  6. 8. Networks the familiar wireless local area networks (WLANs) and the most common type of Medium-Range network is wireless fidelity (Wi-Fi).
  7. 11. a phenomenon that occurs when the functions of many physical devices are included in one other physical device. Consider that your smartphone includes the functions of digital cameras for images and video, radios, televisions, Internet access via Web browsers, recording studios, editing suites, movie theaters, GPS navigators, word processors, spreadsheets, stereos, flashlights, board games, card games, video games, an entire range of medical devices, maps, atlases, encyclopedias, dictionaries, translators, textbooks, watches, alarm clocks, books, calculators, address books, credit card swipers, magnifying glasses, money and credit cards, car keys, hotel keys, cellular telephony, Wi-Fi, e-mail access, text messaging, a full QWERTY keyboard, and many, many others.
  8. 16. something that changes its location over time
  9. 17. without wires.
  10. 20. is red light that is not commonly visible to human eyes and common applications of infrared light are found in remote control units for televisions and DVD and CD players.