What Is uplink

Pertaining to radiocommunication service, an uplink (UL or U/L) is the portion of a feeder link used for the transmission of signals from an earth station to a space radio station, space radio system or high altitude platform station .

Based on different functions and configurations, network switch ports have two main categories: uplink port and normal port (downlink port). The uplink port on switch is usually a higher-speed port used to connect a device to other higher-speed ones in the topology or smaller local network to a larger network .

In satellite communication, the uplink frequency is higher than the downlink frequency because the attenuation level increase with an increase in frequency . The power at the ground station (Base Station) is more than compared to the power available at the satellite.

In satellite telecommunication, a downlink is the link from a satellite down to one or more ground stations or receivers, and an uplink is the link from a ground station up to a satellite .