Chapter 8 Flashcards
mobile wallet
debit/credit cards in your phone.
wireless
electromagnetic waves rather than wire or cable carries signal between communicating devices.
mobile computing
real-time, wireless connection between a mobile device and other computing environments, such as the internet or an intranet. Basically using the phones various functions.
Mobile Commerce
(m-commerce) e-commerce activities conducted through mobile device.
persuasive computing
(Ubiquitous computing) devices have processing power with wireless or wired connections to a global network
ubiquitous computing
(Pervasive computing) devices have processing power with wireless or wired connections to a global network
What are the key advantages of wireless devices?
1) small and easy to carry/wear,
2) they have sufficient computing power to perform productive tasks,
3) communicate wirelessly with the internet and other devices.
microwave transmissions
systems transmit data via electromagnetic waves. High-volume, long distance, line of sight communication. Easily disrupted by weather.
line of sight communications
transmitter and receiver must be in view of each other.
satellite transmission
use communication satellites (GEO, LEO, and MEO)
satellite footprint
the area of the earth’s surface covered by a satellite transmission
broadcast
satellites transmit signals to many receivers at one time.
propagation delay
quarter second delay to send and return signals (ie lag in telephone communication)
global positioning system
GPS, uses MEO satellites to enable users to determine their position anywhere on the earth.
radio transmission
radio-frequencies to send data directly between transmitters and receivers.
satellite radio
uninterrupted, near CD quality music sent to the radio
infrared
a red light not visible to the human eye. Remote controls, CD and DVD players. Uses a transceiver to transmit and receive short distance signals.
bluetooth
used to create small personal area networks.
Personal Area Network (PAN)
computer network used for communication among computer devices, all located in close proximity.
ultra-wideband (UWB)
a high speed wireless technology. Ie streaming movies.
near-field communications
embedded in mobile devices and credit cards. The smallest range of all short range wireless networks.
list short range wireless networks
Bluetooth, Ultra-wideband, Near-field Communications
list medium range wireless networks
Wireless fidelity (WIFI), Wireless mesh networks
Wireless Fidelity (WIFI)
medium range WLAN wireless local area network. Basically a LAN without the cables.
wireless access point
a transmitter with an antenna connect to a wire LAN that provides internet connection.
MiFi
portable wifi, hotspot wherever you go
mesh networks
uses multiple wifi access points to create a wide area network.
list wide area wireless networks
Cellular radio, wireless broadband or WiMax
cells
radio antennas or towers for each geographic region. used for cell phones.
Location Based Commerce
(L-commerce) mobile commerce that uses your location
telemetry
wireless transmission and receipt of data gathered from remote sensors. Ie if you lose you iphone…
Radio Frequency Identification
manufacturers attach tags with antennas and computer chips to goods then tracks their movements through radio signal
Wireless Sensor Networks (WSN’s)
interconnected sensors called “motes” placed into the physical environment.
Rouge Access Points
unauthorized access point to a wireless network
