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The two main methods of mobile backhaul implementations are fiber-based backhaul and wireless point-to-point backhaul. [2] Other methods, such as copper-based wireline, satellite communications and point-to-multipoint wireless technologies are being phased out as capacity and latency requirements become higher in 4G and 5G networks.
All 5G wireless devices in a cell communicate by radio waves with a cellular base station via fixed antennas, over frequencies assigned by the base station. The base stations, termed nodes, are connected to switching centers in the telephone network and routers for Internet access by high-bandwidth optical fiber or wireless backhaul connections.
By early 2017, the Webpass division of Google Fiber expanded 1 Gbit/s wireless service to customers in many cities in the United States. [ 22 ] In November 2016, Atlas Networks, an ISP that serves Seattle , deployed its V-band Gbit/s service to customers within the 750-metre (0.47-mile) to its fiber networks.
Ceragon provides wireless equipment with capacities of up to 20 Gbit/s and plans to add products based on higher frequency bands, to support up to 100 Gbit/s. [citation needed] Ceragon markets its products under the IP-20 and IP-50 brands. Ceragon has sales offices located throughout North and South America, EMEA, and Asia that handle direct sales.
Radio over fiber (RoF) or RF over fiber (RFoF) refers to a technology whereby light is modulated by a radio frequency signal and transmitted over an optical fiber link. Main technical advantages of using fiber optical links are lower transmission losses and reduced sensitivity to noise and electromagnetic interference compared to all-electrical signal transmission.
For wider area communications, wireless local area network (WLAN) is used. WLANs are often known by their commercial product name Wi-Fi. These systems are used to provide wireless access to other systems on the local network such as other computers, shared printers, and other such devices or even the internet.
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