A method performed by a first radio network node for handling mobility of a wireless device in a first service area in a wireless communication network, the first radio network node providing radio coverage over the first service area using a first reference signal for identifying the first service area in the wireless communication network, and a second radio network node providing radio coverage over a second service area using a second reference signal for identifying the second service area in the wireless communication network; the method comprising: - receiving a local measurement report from the wireless device, which local measurement report indicates a first local signal strength or quality of the first reference signal and a second local signal strength or quality of the second reference signal at the wireless device; - obtaining a first signal strength or quality of a first dedicated beam for data transmission for the wireless device in the first service area; - receiving a measurement report from the second radio network node, which measurement report indicates a second signal strength or quality of a second dedicated beam used for data transmission for specific wireless devices in the second service area; - computing a first relation between the first local signal strength or quality of the first reference signal and the obtained first signal strength or quality of the first dedicated beam; - computing a second relation between the second local signal strength or quality of the second reference signal and the received second signal strength or quality of the second dedicated beam; and - performing a mobility decision for the wireless device based on the first and second computed relations, wherein the mobility decision comprises handing over the wireless device to the second radio network node when the received first local signal strength or quality of the first reference signal times the computed first relation is smaller than the received second local signal strength or quality of the second reference signal times the computed second relation. - receiving a local measurement report from the wireless device, which local measurement report indicates a first local signal strength or quality of the first reference signal and a second local signal strength or quality of the second reference signal at the wireless device; - obtaining a first signal strength or quality of a first dedicated beam for data transmission for the wireless device in the first service area; - receiving a measurement report from the second radio network node, which measurement report indicates a second signal strength or quality of a second dedicated beam used for data transmission for specific wireless devices in the second service area; - computing a first relation between the first local signal strength or quality of the first reference signal and the obtained first signal strength or quality of the first dedicated beam; - computing a second relation between the second local signal strength or quality of the second reference signal and the received second signal strength or quality of the second dedicated beam; and - performing a mobility decision for the wireless device based on the first and second computed relations, wherein the mobility decision comprises handing over the wireless device to the second radio network node when the received first local signal strength or quality of the first reference signal times the computed first relation is smaller than the received second local signal strength or quality of the second reference signal times the computed second relation.