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Wireless network
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===Cellular network=== {{main|cellular network}} [[Image:frequency reuse.svg|thumb|Example of frequency reuse factor or pattern, for four frequencies (F1-F4)]] A '''cellular network''' or '''mobile network''' is a radio network distributed over land areas called cells, each served by at least one fixed-location [[transceiver]], known as a [[cell site]] or [[base station]]. In a cellular network, each cell characteristically uses a different set of radio frequencies from all their immediate neighbouring cells to avoid any interference. When joined these cells provide radio coverage over a wide geographic area. This enables a large number of portable transceivers (e.g., mobile phones, [[pager]]s, etc.) to communicate with each other and with fixed transceivers and telephones anywhere in the network, via base stations, even if some of the transceivers are moving through more than one cell during transmission. Although originally intended for cell phones, with the development of [[smartphone]]s, [[cellular telephone network]]s routinely carry data in addition to telephone conversations: *[[Global System for Mobile Communications]] (GSM): The GSM network is divided into three major systems: the switching system, the base station system, and the operation and support system. The cell phone connects to the base system station which then connects to the operation and support station; it then connects to the switching station where the call is transferred to where it needs to go. GSM is the most common standard and is used for a majority of cell phones.<ref>{{Cite web | title = GSM World statistics | publisher = GSM Association | year = 2010 | url = http://www.gsmworld.com/newsroom/market-data/market_data_summary.htm | access-date = 16 March 2011 | url-status = dead | archive-url = https://web.archive.org/web/20110719033744/http://www.gsmworld.com/newsroom/market-data/market_data_summary.htm | archive-date = 19 July 2011 }}</ref> *[[Personal Communications Service]] (PCS): PCS is a radio band that can be used by mobile phones in North America and South Asia. Sprint happened to be the first service to set up a PCS. *[[D-AMPS]]: Digital Advanced Mobile Phone Service, an upgraded version of AMPS, is being phased out due to advancements in technology. The newer GSM networks are replacing the older system. ====Private LTE/5G networks==== Private LTE/5G networks use licensed, shared or unlicensed wireless spectrum thanks to LTE or 5G cellular network base stations, small cells and other radio access network (RAN) infrastructure to transmit voice and data to edge devices (smartphones, embedded modules, routers and gateways. 3GPP defines 5G private networks as non-public networks that typically employ a smaller-scale deployment to meet an organization's needs for reliability, accessibility, and maintainability. ====Open Source==== Open source private networks are based on a collaborative, community-driven software that relies on peer review and production to use, modify and share the source code.
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