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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.
The Cellular band occupies 824–849 MHz and 869–894 MHz ranges. To issue cellular licenses, the FCC divided the U.S. into 734 geographic markets called Cellular Market Areas (CMAs) and divided the 40 MHz of spectrum into two, 20 MHz amounts referred to as channel blocks; channel block A and channel block B.
In the U.S., the analog AMPS standard that used the cellular band (800 MHz) was replaced by a number of digital systems. Initially, systems based upon the AMPS mobile phone model were popular, including IS-95 (often known as " CDMA ", the air interface technology it uses) and IS-136 (often known as D-AMPS, Digital AMPS, or " TDMA ", the air ...
After these transactions, US Cellular will retain 3.4 billion MHz POPs of low and mid-band spectrum (700 MHz, 3.45GHz, CBRS, and C-Band) and 17.2 billion MHz POPs of mmWave spectrum.
In May, U.S. Cellular entered into an agreement with T-Mobile to sell almost all of its wireless operations including customers, stores and 30% of its spectrum assets in a deal valued at $4.4 billion.
The term Cellular is sometimes used to describe GSM services in the 850 MHz band, because the original analog cellular mobile communication system was allocated in this spectrum. Further GSM-850 is also sometimes called GSM-800 because this frequency range was known as the "800 MHz band" (for simplification) when it was first allocated for AMPS ...
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Frequency allocation (or spectrum allocation) ... Cellular AMPS 806–947 0.003 .33 Amateur Land mobile GPS 1200–1600 .23 Cellular PCS 1700–2000