Data transmission method and apparatus

A data transmission method, comprising:

• in a first sub-cycle of an event cycle and in a first slot corresponding to a first slave device, receiving data sent by a master device, and feeding back indication information to the master device based on a data receiving status;
• and
• if the indication information comprises first-type indication information, continuously performing data monitoring in a plurality of second slots of a second sub-cycle of the event cycle, and detecting, in at least one second slot, retransmission data sent by the master device, wherein the at least one second slot is a retransmission slot configured by the master device for the first slave device based on the indication information fed back by the first slave device, and the first-type indication information indicates that there is data that is not successfully received by the first slave device.

A data transmission apparatus, comprising:

• a transceiver configured to transmit data to a plurality of slave devices in a plurality of first slots of a first sub-cycle of an event cycle, and receive indication information fed back by each of the slave devices based on a data receiving status;
• and
• a processor configured to configure a retransmission slot for each of the slave devices in a plurality of second slots of a second sub-cycle of the event cycle based on the indication information.