Migration of nodes in an IAB communication system

Managing transport migration for traffic related to an Integrated Access Backhaul, IAB, node is disclosed. The transport migration is to be performed after a Distributed Unit, DU, of the IAB node has been migrated from a source IAB topology managed by a source IAB donor Central Unit, CU, to a target IAB topology managed by a target IAB donor CU. The target IAB donor CU receives a notification including identification information for identifying an IAB donor CU serving a Mobile Termination, MT, of the IAB node, the IAB donor CU serving the MT of the IAB node being a different IAB donor CU to the target IAB donor CU. Based on the identification information and after the DU of the IAB node has been migrated to the target IAB topology, performing transport migration for migrating traffic related to the IAB node for routing over at least one path between the target IAB donor CU and the IAB node through an IAB topology managed by the IAB donor CU serving the MT.