User equipment and method for performing repetition

1. A user equipment, comprising:

a processor, being configured to:

determine a repetition sequence, wherein the repetition sequence comprises a plurality of repetitions; and

schedule the repetition sequence on a time slot or on a plurality of consecutive time slots, wherein the time slot or at least one of the plurality of consecutive time slots is arranged to contain at least two of the plurality of repetitions; and

a transceiver electrically connected with the processor, being configured to transmit the plurality of repetitions to a base station;

wherein when any one of the plurality of repetitions crosses a slot boundary, or when at least one symbol location corresponding to any one of the plurality of repetitions is unusable in the time slot or in the plurality of time slots, the processor is further configured to:

divide the repetition into a former partition and a latter partition;

transmit the former partition via the transceiver; and

postpone or drop the latter partition.

2. The user equipment of claim 1 , wherein:

the transceiver is further configured to receive a resource allocation from the base station in advance, wherein the resource allocation is comprised in a Radio Resource Control (RRC) message or Downlink Control Information (DCI), and the resource allocation comprises at least a Starting symbol Length Indication Value (SLIV) and a repetition number; and

the processor is further configured to determine the repetition sequence and the starting time point of the repetition sequence according to the resource allocation.

3. The user equipment of claim 1 , wherein the transceiver is further configured to receive an instruction from the base station, and determine, based on the instruction, whether a semi-static flexible symbol of a symbol location corresponding to any one of the plurality of repetitions is usable.

4. The user equipment of claim 1 , wherein the processor drops all repetitions that are not yet transmitted when the number of postponing repetitions exceeds a maximum number of postponement.

5. The user equipment of claim 1 , wherein the processor is further configured to perform a Redundancy Version (RV) mapping to the plurality of repetitions according to a preset rule.

6. The user equipment of claim 1 , wherein the transceiver transmits the plurality of repetitions in a transmission period or across a plurality of transmission periods.

7. The user equipment of claim 1 , wherein:

the repetition sequence is based on configured-grant transmission; and

the plurality of repetitions correspond to the same hybrid automatic repeat request (HARQ) process.

8. The user equipment of claim 1 , wherein:

the repetition sequence is based on configured-grant transmission; and

the transceiver is further configured to receive an HARQ acknowledgement (HARQ ACK) from the base station, and terminate the remaining repetitions of the repetition sequence according to the HARQ ACK.

9. The user equipment of claim 8 , wherein the HARQ ACK corresponds to one or more HARQ processes, and the processor is further configured to stop a configured-grant timer related to the one or more HARQ processes according to the HARQ ACK.

10. A method for performing repetition, comprising:

determining, by a user equipment, a repetition sequence, wherein the repetition sequence comprises a plurality of repetitions;

scheduling, by the user equipment, the repetition sequence on a time slot or on a plurality of consecutive time slots, wherein the time slot or at least one of the plurality of consecutive time slots is arranged to contain at least two of the plurality of repetitions; and

transmitting, by the user equipment, the plurality of repetitions to a base station;

wherein when any one of the plurality of repetitions crosses a slot boundary, or when at least one symbol location corresponding to any one of the plurality of repetitions is unusable in the time slot or in the plurality of time slots, the method for performing repetition further comprises:

dividing the repetition into a former partition and a latter partition by the user equipment;

transmitting the former partition by the user equipment; and

postponing or dropping the latter partition by the user equipment.

11. The method for performing repetition of claim 10 , further comprising:

receiving in advance, by the user equipment, a resource allocation from the base station, wherein the resource allocation is comprised in a Radio Resource Control (RRC) message or Downlink Control Information (DCI), and the resource allocation comprises at least a Starting symbol Length Indication Value (SLIV) and a repetition number; and

determining, by the user equipment, the repetition sequence and the starting time point of the repetition sequence according to the resource allocation.

12. The method for performing repetition of claim 10 , further comprising:

receiving, by the user equipment, an instruction from the base station; and

determining, by the user equipment, whether a semi-static flexible symbol of a symbol location corresponding to any one of the plurality of repetitions is usable based on the instruction.

13. The method for performing repetition of claim 10 , further comprising: dropping, by the user equipment, all repetitions that are not yet transmitted when the number of postponing repetitions exceeds a maximum number of postponement.

14. The method for performing repetition of claim 10 , further comprising: performing, by the user equipment, a Redundancy Version (RV) mapping to the plurality of repetitions according to a preset rule.

15. The method for performing repetition of claim 10 , wherein the user equipment transmits the plurality of repetitions in a transmission period or across a plurality of transmission periods.

16. The method for performing repetition of claim 10 , wherein:

the repetition sequence is based on configured-grant transmission; and

the plurality of repetitions correspond to the same hybrid automatic repeat request (HARQ) process.

17. The method for performing repetition of claim 10 , wherein the repetition sequence is based on configured-grant transmission; and the method for performing repetition further comprises:

receiving, by the user equipment, an HARQ acknowledgement (HARQ ACK) from the base station; and

terminating, by the user equipment, the remaining repetitions of the repetition sequence according to the HARQ ACK.

18. The method for performing repetition of claim 17 , wherein the HARQ ACK corresponds to one or more HARQ processes, and the method for performing repetition further comprises: stopping, by the user equipment, a configured-grant timer related to the one or more HARQ processes according to the HARQ ACK.