Data transmission method, apparatus, device and system for direct communication

A data transmission method for direct communication, comprising:

• transmitting, by an access network device, information to a first terminal, the information being configured to instruct the first terminal to transmit sidelink data to a second terminal through a sidelink, receive sidelink hybrid auto repeat request (HARQ) feedback information fed back by the second terminal and report the sidelink HARQ feedback information to the access network device, the sidelink HARQ feedback information being configured to indicate a receiving state corresponding to the sidelink data;
• receiving, by the access network device, the sidelink HARQ feedback information reported by the first terminal, wherein receiving the sidelink HARQ feedback information reported by the first terminal comprises:
• receiving the sidelink HARQ feedback information transmitted by the first terminal in a first time-frequency resource through a physical uplink control channel (PUCCH);
• and
• transmitting a first configuration signaling to the first terminal, the first configuration signaling being configured to indicate a first time interval set, wherein the first time interval set is corresponding to the sidelink HARQ feedback information;
• wherein the first time interval set comprises configured time intervals between sidelink data transmission and reporting corresponding sidelink HARQ feedback information by the first terminal.

A terminal, comprising:

• a processor;
• a transceiver connected to the processor;
• a memory configured to store instructions executable by the processor;
• wherein, the processor is configured to implement acts comprising:
• transmitting sidelink data to a second terminal through a sidelink according to information transmitted by an access network device;
• receiving sidelink hybrid auto repeat request (HARQ) feedback information fed back by the second terminal, the sidelink HARQ feedback information being configured to indicate a receiving state corresponding to the sidelink data;
• and
• reporting the sidelink HARQ feedback information to the access network device, wherein reporting the sidelink HARQ feedback information to the access network device comprises:
• reporting the sidelink HARQ feedback information to the access network device in a first time-frequency resource through a physical uplink control channel (PUCCH);
• and
• receiving a first configuration signaling transmitted by the access network device, the first configuration signaling being configured to indicate a first time interval set, wherein the first time interval set is corresponding to the sidelink HARQ feedback information,
• wherein the first time interval set comprises configured time intervals between sidelink data transmission and reporting corresponding sidelink HARQ feedback information by the terminal.