| abstract |
There is provided a method, comprising: generating, by a network element, a radio map of a single-frequency network having a plurality of cells, wherein the radio map represents power levels of radio signals at several locations in the network; selecting a first function to be applied, wherein the first function is at least partly based on the radio map and comprises physical cell identity, PCI, modulo 3 values for the plurality of cells as input variables; applying different combinations of the PCI modulo 3 values in the first function, wherein each candidate PCI modulo 3 value is selected from a group of three available options; determining the output of the first function with respect to each combination; determining which combination provides the output fulfilling a predefined criterion; and allocating those PCI modulo 3 values, which correspond to the output fulfilling the predefined criterion, to the plurality of cells in order to reduce the interference between primary synchronization sequences. |