Timing method for time division duplex communication, base station, and user equipment

A base station, wherein the base station comprises a processor and a transmitter;

• the processor is configured to determine, for a given radio frame structure, whether grouping needs to be performed on uplink short transmission time intervals sTTIs and/or downlink sTTIs;
• the processor is further configured to, when grouping needs to be performed on the uplink sTTIs and the downlink sTTIs, group and pair the uplink sTTIs and the downlink sTTIs, add first indication information to control signaling, and send the control signaling to user equipment, wherein the first indication information is used to indicate an uplink sTTI sequence number in an uplink sTTI group for uplink data transmission or feedback to downlink data scheduling, and the uplink sTTI group is corresponding to a downlink sTTI group for uplink data scheduling or downlink data scheduling;
• the processor is further configured to, when grouping needs to be performed only on the uplink sTTIs, group the uplink sTTIs into one group, wherein during uplink data scheduling, all downlink sTTIs that are at an interval of k or more sTTIs from the uplink sTTIs in the uplink sTTI group are usable for sending uplink data scheduling instructions, and k is a preset minimum scheduling gap;
• and add second indication information to the control signaling, wherein the second indication information is used to indicate an uplink sTTI sequence number in an uplink sTTI group for uplink data transmission;
• the transmitter is configured to send the control signaling to user equipment;
• and
• the processor is further configured to, when grouping does not need to be performed on the uplink sTTIs or the downlink sTTIs, instruct to transmit uplink data or send feedback to downlink data scheduling in a first uplink sTTI that is at an interval of k or more sTTIs from a downlink sTTI in which an uplink or downlink data scheduling instruction is sent.