Mobile telecommunication device includes an application module to execute applications, radio module to communicate radio signals to and from a remote network node, and base band module to communicate data to and from the radio module, and to code and decode the data using a communication protocol. The base band module includes modem usage analyzing submodule to receive modem requests from applications, and to analyze all modem requests received during predefined time period. The base band module includes pattern suggestion submodule to receive information on the modem requests from the modem usage analyzing submodule, and to select reception and transmission pattern using information on the modem requests. The base band module includes Radio Resource Control protocol handler configured to send one or more parameters defining the selected reception and transmission pattern to the network node. The utilized DRX/DTX parameters can be optimized to save battery in the device.