Method and terminal for data transmission

A terminal for data transmission, comprising a processor;

• and a memory for storing instructions executable by the processor, wherein execution of the instructions by the processor causes the processor to perform:
• determining, according to configuration information sent by a base station, to use at least two different Transmission Time Intervals (TTIs) to transmit different Physical Downlink Shared Channels (PDSCHs) and/or different Physical Uplink Shared Channels (PUSCHs) on a target carrier;
• detecting whether first Downlink Control Information (DCI) is present in at least one Physical Downlink Control Channel (PDCCH) in a target subframe on the target carrier, the first DCI being used to schedule at least one PDSCH transmitted in the target subframe on the target carrier;
• and
• detecting, in the case that the terminal detects that the first DCI is not present in the at least one PDCCH in the target subframe, or in the case that the terminal detects that the first DCI is present in the at least one PDCCH in the target subframe and a TTI of the at least one PDSCH scheduled by the first DCI is smaller in length than the target subframe, a dedicated downlink control channel in the target subframe, the dedicated control channel merely being used to transmit dedicated DCI, a TTI of a PDSCH or PUSCH scheduled by the dedicated DCI being smaller in length than the target subframe.