What is ‘uplink’ and ‘downlink’ in a satellite communication system?
What are their functions? Answer: An uplink (UL or U/L) is the portion of a communications link used for the transmission of signals from an Earth terminal to a satellite or to an airborne platform. An uplink is the inverse of a downlink. An uplink or downlink is distinguished from reverse link or forward link (see below). * Pertaining to data transmission from a data station to the head end. * Pertaining to GSM and cellular networks, the radio uplink is the transmission path from the Mobile Station (Cell Phone) to a Base Station (Cell Site). Traffic and signaling flows within the BSS and NSS may also be identified as uplink and downlink. A downlink (DL) is the link from a satellite to a ground station. * Pertaining to cellular networks, the radio downlink is the transmission path from a Base Transceiver Station (Cell Site) to the Mobile Station (Cell Phone). Traffic and signaling flows within the BSS and NSS may also be identified as uplink and downlink. (b) Explain two (2) techniques
