Radio-resource management, RRM, configuration device, for a network comprising a plurality of access nodes, which is configured to: divide the plurality of access nodes of the network into clusters, select at least one access node of each cluster as RRM controller, and determine the non-selected access nodes of each cluster as slave nodes, select, for each cluster, a RRM split, whereby RRM functions are separated between each slave node and the at least one RRM controller of the respective cluster, and transmit, to each access node, information about its cluster, the at least one RRM controller of the cluster, and the selected RRM split, the device being configured to: select the RRM split based on a type of at least one network slice associated with the cluster, and configured to: select, for each cluster, the RRM split between a slave node and the at least one RRM controller of the respective cluster based on a backhaul quality of the slave node to the at least one RRM controller and/or based on an average load of the access nodes of the respective cluster, and is further configured to: select the RRM split: as centralized RRM to be performed completely at the at least one RRM controller, if the backhaul quality is ideal and if the average load is below a threshold value; or as distributed RRM to be performed distributed among the access nodes of the cluster, if the backhaul quality is ideal and if the average load is above the threshold value; or as semi-centralized RRM, wherein a first type of RRM is performed distributed among the access nodes of the cluster and a second type of RRM is performed at the at least one RRM controller, if the backhaul quality is not ideal. divide the plurality of access nodes of the network into clusters, select at least one access node of each cluster as RRM controller, and determine the non-selected access nodes of each cluster as slave nodes, select, for each cluster, a RRM split, whereby RRM functions are separated between each slave node and the at least one RRM controller of the respective cluster, and transmit, to each access node, information about its cluster, the at least one RRM controller of the cluster, and the selected RRM split, the device being configured to: select the RRM split based on a type of at least one network slice associated with the cluster, and configured to: select, for each cluster, the RRM split between a slave node and the at least one RRM controller of the respective cluster based on a backhaul quality of the slave node to the at least one RRM controller and/or based on an average load of the access nodes of the respective cluster, and is further configured to: select the RRM split: as centralized RRM to be performed completely at the at least one RRM controller, if the backhaul quality is ideal and if the average load is below a threshold value; or as distributed RRM to be performed distributed among the access nodes of the cluster, if the backhaul quality is ideal and if the average load is above the threshold value; or as semi-centralized RRM, wherein a first type of RRM is performed distributed among the access nodes of the cluster and a second type of RRM is performed at the at least one RRM controller, if the backhaul quality is not ideal. select the RRM split: as centralized RRM to be performed completely at the at least one RRM controller, if the backhaul quality is ideal and if the average load is below a threshold value; or as distributed RRM to be performed distributed among the access nodes of the cluster, if the backhaul quality is ideal and if the average load is above the threshold value; or as semi-centralized RRM, wherein a first type of RRM is performed distributed among the access nodes of the cluster and a second type of RRM is performed at the at least one RRM controller, if the backhaul quality is not ideal. as centralized RRM to be performed completely at the at least one RRM controller, if the backhaul quality is ideal and if the average load is below a threshold value; or as distributed RRM to be performed distributed among the access nodes of the cluster, if the backhaul quality is ideal and if the average load is above the threshold value; or as semi-centralized RRM, wherein a first type of RRM is performed distributed among the access nodes of the cluster and a second type of RRM is performed at the at least one RRM controller, if the backhaul quality is not ideal.