A network node serves a cell of a mobile network. The network node indicates an offset value to a user equipment in the cell. The offset value is added to a channel quality value measured by the user equipment for triggering a handover from the cell to a further cell of the mobile network. The network node increases the indicated offset value until a handover of the user equipment to the further cell of the mobile network is triggered. After the handover to the further cell, the network node receives an indication of a channel quality of a downlink control channel of the further cell as experienced by the user equipment, e.g., in control signalling of a further handover of the user equipment back to the cell or in a request to protect radio resources of the downlink control channel.