Abstract: A method and associated hardware for managing communications in a cellular network. Network usage is monitored by signaling mediation probes, either by monitoring signaling links or by receiving usage information from network elements. Based on the monitored network usage, an activity server predicts a forthcoming time interval during which sufficient network resources will be available to allow a predetermined message to be sent to one or more users of the network. When the time interval arrives, the activity server initiates the sending of the message, either by itself sending the message or by triggering another device to send the message.