It is provided a method, comprising estimating a future instantaneously required processing effort required by a terminal to process symbols received in at least one first transmission time interval and at least one second transmission time interval; checking if the estimated future instantaneously required processing effort exceeds a capability of the terminal to process the symbols; modifying a future scheduling of the symbols for the terminal if the future instantaneously required processing effort exceeds the capability; wherein the first transmission time intervals and the second transmission time intervals are of different types.