The present invention relates to an arrangement adapted to be located in a network node, e.g. in a RNC, in a mobile communication network. The arrangement selects at least one diversity handover, DHO, node, that is to perform macro diversity functions, amongst the nodes of the mobile communication network comprising macro diversity functionality means. The selection is based on base station combinations of said mobile communication network. The arrangement comprises means for retrieving at least one DHO node, that is to perform macro diversity functions, from a database comprising base station combinations of said mobile communication network and a pre-calculated DHO node selection for each such base station combination. The present invention also relates to said database. The database comprises means for storing base station combinations of said mobile communication network and means for storing a pre-calculated Diversity Handover node selection for each such base station combination.