According to another aspect of the disclosure, the determining of neighbour cell relations between the first network and one or more cells of the second network comprises associating the measurement results to a location in a location oriented map. Thus, in addition to gathering information on cell-to-cell relationships, it is also possible to associate such cell-to-cell relationships to geographical locations. Such a map may be used as an input to respective distribution functions in the first network and/or the second network, but also shared as input to further cellular networks providing coverage in the area of the second network. The distributions functions execute the distribution between various networks.

Thus, according to an aspect of the disclosure, the method further comprises transmitting information on the neighbor cell relations to one or more neighbouring network nodes of the first network or to one or more neighbouring network nodes of the second network.

The above mentioned object of the disclosure is also obtained by a computer readable storage medium, having stored thereon a computer program which, when executed in a network node, causes the network node to execute any of the above mentioned method embodiments.