There are provided a method and system of controlling traffic in a cellular network comprising at least one site characterized by a plurality of cells sharing a common antenna and operating in different frequencies. The method comprises processing performance-related data and network topology-related to obtain, for each cell of the plurality of cells, a performance score, thus giving rise to a set of frequency-dependent scores associated with the shared antenna; and enabling provisioning of the shared antenna in accordance with the set of frequency-dependent scores associated with the shared antenna. When no leading frequency is configured for the shared antenna, the provisioning is enabled merely when each score in the set of frequency-dependent scores meets respective adjustment criteria; and when a frequency among the different frequencies is configured as a leading frequency, the provisioning is enabled merely when a score corresponding to the leading frequency meets an adjustment criterion for the leading frequency.