1. A device for managing selection of dormancy timers in a mobile network, the device comprising: a receiver that receives a request for establishment of a new radio channel, the radio channel used for transmission of data packets associated with a flow; a channel establishment block that establishes the radio channel and sets a value of a corresponding dormancy timer to a default dormancy timer value for a requested channel type; a mapping function that provides a correspondence between applications and optimal dormancy timer values; and a dormancy timer controller that: receives application information from a Deep Packet Inspection (DPI) device, the application information specifying an application associated with the flow, determines a modified dormancy timer value by querying the mapping function using the application information received from the DPI device, and changes the value of the dormancy timer to the modified dormancy timer value.