A method of operation of a network node in a wireless communication system, comprising: selecting a sector-carrier for a wireless device from among a plurality of sector-carriers in accordance with a Multi-User Multiple Input Multiple Output, MU-MIMO, aware sector-carrier allocation procedure that takes into account possible MU-MIMO pairings for the wireless device on the plurality of sector-carriers, comprising: - obtaining predicted channel state information for the wireless device for each of the plurality of sector-carriers, the predicted channel state information being predicted using model training that is based on live network data; - determining a subset of the plurality of sector-carriers for which the predicted channel state information for the wireless device is better than a predefined threshold, wherein the possible MU-MIMO pairings for the wireless device on the subset of the plurality of sector-carriers are pairings with other wireless devices on a same sector-carrier for which a predicted channel orthogonality satisfies a predefined condition that is indicative of good channel orthogonality, and wherein the predicted channel orthogonality is predicted using model training based on live network data, further comprising coordinating and/or signaling with at least one other network node to train and/or use a model for predicting the channel orthogonality; - for each sector-carrier in the subset of the plurality of sector-carriers, determining whether there are any possible MU-MIMO pairings for the wireless device on the sector-carrier; and - selecting the sector-carrier for the wireless device from the sub-set of the plurality of sector-carriers in such a manner as to take into account any possible MU-MIMO pairings for the wireless device on the sector-carriers in the subset of the plurality of sector-carriers; and providing an indication of the sector-carrier selected for the wireless device to at least one node selected from a group consisting of: another network node and the wireless device. selecting a sector-carrier for a wireless device from among a plurality of sector-carriers in accordance with a Multi-User Multiple Input Multiple Output, MU-MIMO, aware sector-carrier allocation procedure that takes into account possible MU-MIMO pairings for the wireless device on the plurality of sector-carriers, comprising: - obtaining predicted channel state information for the wireless device for each of the plurality of sector-carriers, the predicted channel state information being predicted using model training that is based on live network data; - determining a subset of the plurality of sector-carriers for which the predicted channel state information for the wireless device is better than a predefined threshold, wherein the possible MU-MIMO pairings for the wireless device on the subset of the plurality of sector-carriers are pairings with other wireless devices on a same sector-carrier for which a predicted channel orthogonality satisfies a predefined condition that is indicative of good channel orthogonality, and wherein the predicted channel orthogonality is predicted using model training based on live network data, further comprising coordinating and/or signaling with at least one other network node to train and/or use a model for predicting the channel orthogonality; - for each sector-carrier in the subset of the plurality of sector-carriers, determining whether there are any possible MU-MIMO pairings for the wireless device on the sector-carrier; and - selecting the sector-carrier for the wireless device from the sub-set of the plurality of sector-carriers in such a manner as to take into account any possible MU-MIMO pairings for the wireless device on the sector-carriers in the subset of the plurality of sector-carriers; and - obtaining predicted channel state information for the wireless device for each of the plurality of sector-carriers, the predicted channel state information being predicted using model training that is based on live network data; - determining a subset of the plurality of sector-carriers for which the predicted channel state information for the wireless device is better than a predefined threshold, wherein the possible MU-MIMO pairings for the wireless device on the subset of the plurality of sector-carriers are pairings with other wireless devices on a same sector-carrier for which a predicted channel orthogonality satisfies a predefined condition that is indicative of good channel orthogonality, and wherein the predicted channel orthogonality is predicted using model training based on live network data, further comprising coordinating and/or signaling with at least one other network node to train and/or use a model for predicting the channel orthogonality; - for each sector-carrier in the subset of the plurality of sector-carriers, determining whether there are any possible MU-MIMO pairings for the wireless device on the sector-carrier; and - selecting the sector-carrier for the wireless device from the sub-set of the plurality of sector-carriers in such a manner as to take into account any possible MU-MIMO pairings for the wireless device on the sector-carriers in the subset of the plurality of sector-carriers; and providing an indication of the sector-carrier selected for the wireless device to at least one node selected from a group consisting of: another network node and the wireless device.