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A mobile phone connects to the telephone network by radio waves exchanged with a local antenna and automated transceiver called a cellular base station ( cell site or cell tower ). The service area served by each provider is divided into small geographical areas called cells, and all the phones in a cell communicate with that cell's antenna.
A wireless repeater (also called wireless range extender or wifi extender) is a device that takes an existing signal from a wireless router or wireless access point and rebroadcasts it to create a second network. When two or more hosts have to be connected with one another over the IEEE 802.11 protocol and the distance is too long for a direct ...
A service set is the set of all the devices associated with a particular Wi-Fi network. Devices in a service set need not be on the same wavebands or channels. A service set can be local, independent, extended, mesh, or a combination. Each service set has an associated identifier, a 32-byte service set identifier (SSID), which identifies the ...
Wireless Emergency Alerts ( WEA, formerly known as the Commercial Mobile Alert System ( CMAS ), and prior to that as the Personal Localized Alerting Network ( PLAN )), [1] is an alerting network in the United States designed to disseminate emergency alerts to mobile devices such as cell phones and pagers. Organizations are able to disseminate and coordinate emergency alerts and warning ...
Some of these technologies include standards such as ANT UWB, Bluetooth, Zigbee, and Wireless USB . Wireless Sensor Networks (WSN / WSAN) are, generically, networks of low-power, low-cost devices that interconnect wirelessly to collect, exchange, and sometimes act-on data collected from their physical environments - "sensor networks".
Default mode network connectivity. This image shows main regions of the default mode network (yellow) and connectivity between the regions color-coded by structural traversing direction (xyz → rgb). [1] [2]
Guifi.net is a free, open and neutral, mostly wireless community network, with over 37,000 active nodes and about 71,000 km of wireless links (as of December 2021). [1] The majority of these nodes are located in Catalonia and the Valencian Community, in Spain, but the network is growing in other parts of the world. The network is self-organized and operated by the users using unlicensed ...
Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the triggering radar, providing range, bearing and ...