Chapter 2: Architecture — Private 5G: A Systems
These functions imply a global decision-making process, whereby it''s possible to forward traffic to a different base station (or to multiple base
A cell site, cell phone tower, cell base tower, or cellular base station is a cellular -enabled mobile device site where antennas and electronic communications equipment are placed (typically on a radio mast, tower, or other raised structure) to create a cell, or adjacent cells, in a cellular network.
Multi-User MIMO (MU-MIMO) in 4G networks is a type of MIMO antenna technology that allows a base station to use multiple layers of data streams to communicate with multiple devices. Multi-User MIMO improves the system capacity by enabling the LTE network to support more users per cell.
Mobile and base stations communicate using radio frequency (RF) or electromagnetic waves. Specific RF frequencies are planned based on regional needs. For example, GSM uses the 900 MHz band. Two-way communication requires a frequency pair: one for the uplink (mobile to base station) and one for the downlink (base station to mobile).
4G LTE networks were introduced as per the specifications in 3GPP release 8. In the original LTE release, the Multiple Input Multiple Output (MIMO) configuration is 4 x 4 for the downlink (DL) and 2 x 2 for the uplink (UL).
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