Adaptive frequency planning in a cellular network

Radio frequencies of a base station in a cellular network are selected adaptively so that when selecting the uplink frequency, the base station measures at all frequencies or at some frequencies in the receiving band used in the system, what is the total effect of the signal received at the frequency in question. The frequency at which the lowest power is received is selected as the uplink frequency. When you select the downlink frequency, a setting signal is transmitted at all frequencies or at some frequencies in the transmission band. Mobiles located in areas of other cells and operating at the same frequency experience the effect of the tuning signal as an interference. The base station is set to use the downlink frequency at which the interference caused by itself on other traffic is sufficiently low.