A method performed by a device, the method comprising: receiving a configuration that configures a set of short physical downlink control channel candidates; monitoring a first subset of the set of short physical downlink control channel candidates associated with a first set of aggregation levels in a first transmit time interval of a subframe; and monitoring a second subset of the set of short physical downlink control channel candidates associated with a second set of aggregation levels in a second transmit time interval of the subframe; wherein the first subset of the set of short physical downlink control channel candidates and the second subset of the short physical downlink control channel candidates are different at least in one short physical downlink control channel candidate, wherein the first subset of the set of short physical downlink control channel candidates is determined by the device based on a first index associated with the first transmit time interval within the subframe, wherein the second subset of the set of short physical downlink control channel candidates is determined by the device based on a second index associated with the second transmit time interval within the subframe, wherein an index associated with a transmit time interval within the subframe is either the transmit time interval index or the slot index corresponding to the transmit time interval, wherein monitoring implies attempting to decode short physical downlink control channel candidates, and wherein the subframe comprises at least the first and the second transmit time intervals, these intervals having a length shorter than the length of the subframe. receiving a configuration that configures a set of short physical downlink control channel candidates; monitoring a first subset of the set of short physical downlink control channel candidates associated with a first set of aggregation levels in a first transmit time interval of a subframe; and monitoring a second subset of the set of short physical downlink control channel candidates associated with a second set of aggregation levels in a second transmit time interval of the subframe; wherein the first subset of the set of short physical downlink control channel candidates and the second subset of the short physical downlink control channel candidates are different at least in one short physical downlink control channel candidate, wherein the first subset of the set of short physical downlink control channel candidates is determined by the device based on a first index associated with the first transmit time interval within the subframe, wherein the second subset of the set of short physical downlink control channel candidates is determined by the device based on a second index associated with the second transmit time interval within the subframe, wherein an index associated with a transmit time interval within the subframe is either the transmit time interval index or the slot index corresponding to the transmit time interval, wherein monitoring implies attempting to decode short physical downlink control channel candidates, and wherein the subframe comprises at least the first and the second transmit time intervals, these intervals having a length shorter than the length of the subframe.