Data transmission method and device

1. A data transmission method, applied to a network access device, comprising:

determining a size of a first transmission sub-block sent on an available time-domain resource of a target time slot based on a first length of the available time-domain resource, a size of an available frequency-domain resource, and a modulation mode and a code rate used in physical layer resource mapping, when a target length of a time-domain resource required by a target transmission block is greater than the first length of the available time-domain resource of the target time slot;

dividing the target transmission block into the first transmission sub-block and a second transmission sub-block based on the size of the first transmission sub-block and a size of the target transmission block, wherein a second length of a time-domain resource required by the second transmission sub-block is equal to a difference between the target length and the first length;

determining a first time-domain resource of the second length for sending the second transmission sub-block in the next time slot after the target time slot based on the second length of the time-domain resource required by the second transmission sub-block; and

sending a first resource allocation message to a terminal, wherein the first resource allocation message comprises the size of the first transmission sub-block, first indication information representing the available time-domain resource of the target time slot configured to send the first transmission sub-block, and second indication information of the first time-domain resource configured to send the second transmission sub-block in the next time slot after the target time slot.

2. The method of claim 1 , wherein the first indication information comprises the first length and a number of a first start symbol of the available time-domain resource of the target time slot, and the second indication information comprises the second length and a number of a second start symbol of the first time-domain resource configured to transmit the second transmission sub-block in the next time slot after the target time slot.

3. The method of claim 1 , wherein before sending the first resource allocation message to the terminal, the method further comprises:

determining a first indicator value and determination information indicating whether the number of the first start symbol is greater than a preset value, according to the first length and the number of the first start symbol of the available time-domain resource of the target time slot;

determining a second indicator value according to the second length and the number of the second start symbol of the first time-domain resource configured to transmit the second sub-transmission block in the next time slot after the target time slot; wherein

the first indication information comprises the first indicator value and the determination information, and the second indication information comprises the second indicator value.

4. The method of claim 1 , further comprising:

determining whether the target length of the time-domain resource required by the target transmission block is greater than the first length of the available time-domain resource of the target time slot;

determining a second time-domain resource for sending the target transmission block on the available time-domain resource of the target time slot, when the target length of the time-domain resource required by the target transmission block is greater than the first length of the available time-domain resource of the target time slot; and

sending a second resource allocation message to the terminal, wherein the second resource allocation message comprises third indication information representing the second time-domain resource configured to send the target transmission block on the available time-domain resource of the target time slot.

5. A data transmission method, applied to a terminal, comprising:

receiving a first resource allocation message sent by a network access device, wherein the first resource allocation message comprises a size of a first transmission sub-block, first indication information representing an available time-domain resource of a target time slot configured to send the first transmission sub-block, and second indication information of a first time-domain resource configured to send a second transmission sub-block in the next time slot after the target time slot;

dividing a target transmission block into the first transmission sub-block and a second transmission sub-block based on the size of the first transmission sub-block and a size of the target transmission block, wherein a size of the second transmission sub-block is equal to a difference between the size of the target transmission block and the size of the first transmission sub-block; and

sending the first transmission sub-block on the available time-domain resource of the target time slot, and sending the second transmission sub-block on the first time-domain resource configured to send the second transmission sub-block in the next time slot after the target time slot.

6. The method of claim 5 , wherein the first indication information comprises a first length and a number of a first start symbol of the available time-domain resource of the target time slot, and the second indication information comprises a second length and a number of a second start symbol of the first time-domain resource configured to transmit the second transmission sub-block in the next time slot after the target time slot.

7. The method of claim 5 , wherein the first indication information comprises a first indicator value and determination information, and the second indication information comprises a second indicator value; and

after receiving the first resource allocation message sent by the network access device, the method further comprises:

determining the first length and the number of the first start symbol of the available time-domain resource of the target time slot according to the first indicator value and the determination information; and

determining the second length and a number of the second start symbol of the first time-domain resource configured to transmit the second transmission sub-block in the next time slot after the target time slot based on the second indicator value.

8. A data transmission device, implementing the method of claim 1 , comprising:

a processor; and

a memory configured to store instructions executable by the processor; wherein

the processor is configured to perform steps of the method of claim 1 .

9. A data transmission device, comprising:

a processor;

a memory configured to store executable instructions of the processor; wherein

the processor is configured to:

receive a first resource allocation message sent by a network access device, wherein the first resource allocation message comprises a size of a first transmission sub-block, first indication information representing an available time-domain resource of a target time slot configured to send the first transmission sub-block, and second indication information of a first time-domain resource configured to send a second transmission sub-block in the next time slot after the target time slot;

divide a target transmission block into the first transmission sub-block and a second transmission sub-block based on the size of the first transmission sub-block and a size of the target transmission block, wherein a size of the second transmission sub-block is equal to a difference between the size of the target transmission block and the size of the first transmission sub-block; and

send the first transmission sub-block on the available time-domain resource of the target time slot, and send the second transmission sub-block on the first time-domain resource configured to send the second transmission sub-block in the next time slot after the target time slot.

10. The device of claim 9 , wherein the first indication information comprises a first length and a number of a first start symbol of the available time-domain resource of the target time slot, and the second indication information comprises a second length and a number of a second start symbol of the first time-domain resource configured to transmit the second transmission sub-block in the next time slot after the target time slot.

11. The device of claim 9 , wherein the first indication information comprises a first indicator value and determination information, and the second indication information comprises a second indicator value; and

after receiving the first resource allocation message sent by the network access device, the processor is further configured to:

determine the first length and the number of the first start symbol of the available time-domain resource of the target time slot according to the first indicator value and the determination information; and

determine the second length and a number of the second start symbol of the first time-domain resource configured to transmit the second transmission sub-block in the next time slot after the target time slot based on the second indicator value.