An application requirement is identified of a wireless device in communication with an access node using a first radio access technology, and a probability is determined that a communication session of the wireless device using the first radio access technology will be dropped based on a wireless device mobility and characteristics of a plurality of neighbor access nodes of the access node. A handover threshold is calculated based on the application requirement and the determined probability, and when a signal level of the first radio access technology received at the wireless device meets the handover threshold, the wireless device is instructed to change from communicating with the access node using the first radio access technology to communicating with the access node using the second radio access technology.