Apparatus and method for transmitting feedback information in wireless communication systems

1. A method for operating a receiving end of a wireless communication system, the method comprising:

receiving, by the receiving end, information on a reference amount for a hybrid automatic repeat request (HARQ) feedback from a transmitting end;

receiving, by the receiving end, a plurality of packets from the transmitting end; and

transmitting, by the receiving end, a feedback signal comprising HARQ feedback information for packets corresponding to the reference amount responsive to an amount of the plurality of packets reaching the reference amount, to the transmitting end.

2. The method of claim 1 , further comprising:

determining, by the receiving end, the reference amount for which the HARQ feedback information is not transmitted to the transmitting end.

3. The method of claim 1 , wherein the transmitting of the feedback signal comprises:

determining, by the receiving end, whether a first reference time passes from a reception of a last packet among the plurality of packets; and

after the first reference time has passed, transmitting, by the receiving end, the feedback signal comprising the HARQ feedback information, to the transmitting end.

4. The method of claim 1 , wherein the transmitting of the feedback signal comprises:

transmitting, by the receiving end, the feedback signal indicating the HARQ feedback information of each of the plurality of packets, to the transmitting end.

5. The method of claim 1 , further comprising:

determining, by the receiving end, whether a second reference time passes from a reception of an initial packet among the plurality of packets; and

when the second reference time passes from the reception of the first packet, transmitting a feedback signal comprising HARQ feedback information for packets received until the second reference time has passed.

6. The method of claim 1 , further comprising:

receiving, by the receiving end, feedback mode change information from the transmitting end; and

confirming, by the receiving end, an operation variable for the HARQ feedback in the feedback mode change information.

7. The method of claim 6 , wherein the operation variable comprises at least one of the reference amount, a first reference time, a reference time for retransmission of the transmitting end, and a feedback mode change time.

8. A method for operating a transmitting end of a wireless communication system, the method comprising:

transmitting, by the transmitting end, information on a reference amount for a hybrid automatic repeat request (HARQ) feedback to a receiving end;

transmitting, by the transmitting end, a plurality of packets to the receiving end; and

receiving, by the transmitting end, a feedback signal comprising HARQ feedback information for packets corresponding to the reference amount responsive to an amount of the plurality of packets reaching the reference amount, from the receiving end.

9. The method of claim 8 , wherein the transmitting of the plurality of packets comprises:

transmitting, by the transmitting end, the plurality of packets and control information comprising a packet index of each of the plurality of packets, to the receiving end.

10. The method of claim 8 , further comprising:

changing, by the transmitting end, a feedback mode for transmitting the HARQ feedback information of the receiving end; and

transmitting, by the transmitting end, feedback mode change information comprising an operation variable for the HARQ feedback, to the receiving end.

11. The method of claim 10 , wherein the operation variable comprises at least one of the reference amount, a first reference time, a reference time for retransmission of the transmitting end, and a feedback mode change time.

12. The method of claim 10 , further comprising:

determining, by the transmitting end, whether to change the feedback mode based on at least one of a service characteristic provided to the receiving end and a channel characteristic in relation to the receiving end.

13. The method of claim 8 , wherein the HARQ feedback information comprises at least one of ACK indicating successful packet reception, NACK indicating packet reception failure, and discontinuous transmission (DTX) indicating no packet reception confirmed.

14. An apparatus for operating a receiving end of a wireless communication system, the apparatus comprising:

at least one processor; and

at least one transceiver configured to:

receive, by the receiving end, information on a reference amount for a hybrid automatic repeat request (HARQ) feedback from a transmitting end;

receive, by the receiving end, a plurality of packets from the transmitting end; and

transmit, by the receiving end, a feedback signal comprising HARQ feedback information for packets corresponding to the reference amount responsive to an amount of the plurality of packets reaching the reference amount, to the transmitting end.

15. The apparatus of claim 14 , wherein the at least one processor is further configured to determine the reference amount for which the HARQ feedback information is not transmitted to the transmitting end.

16. The apparatus of claim 14 , wherein the at least one processor is further configured to:

determine whether a first reference time passes from a reception of a last packet among the plurality of packets; and

after the first reference time has passed, transmit the feedback signal comprising the HARQ feedback information, to the transmitting end.

17. The apparatus of claim 14 , wherein the at least one transceiver is further configured to transmit the feedback signal indicating the HARQ feedback information of each of the plurality of packets, to the transmitting end.

18. The apparatus of claim 14 , wherein the at least one processor is further configured to:

determine whether a second reference time passes from a reception of an initial packet among the plurality of packets; and

when the second reference time passes from the reception of the first packet, transmit a feedback signal comprising HARQ feedback information for packets received until the second reference time has passed.

19. The apparatus of claim 14 , wherein the at least one transceiver is further configured to:

receive feedback mode change information from the transmitting end; and

confirm an operation variable for the HARQ feedback in the feedback mode change information.

20. The apparatus of claim 19 , wherein the operation variable comprises at least one of the reference amount, a first reference time, a reference time for retransmission of the transmitting end, and a feedback mode change time.

21. An apparatus for operating a transmitting end of a wireless communication system, the apparatus comprising:

at least one processor;

at least one transceiver configured to:

transmit information on a reference amount for a hybrid automatic repeat request (HARQ) feedback to a receiving end;

transmit a plurality of packets to the receiving end; and

receive a feedback signal comprising HARQ feedback information for packets corresponding to the reference amount responsive to an amount of the plurality of packets reaching the reference amount, from the receiving end.

22. The apparatus of claim 21 , wherein the at least one transceiver is further configured to transmit the plurality of packets and control information comprising a packet index of each of the plurality of packets, to the receiving end.

23. The apparatus of claim 21 , wherein the at least one processor is further configured to determine whether to change the feedback mode based on at least one of a service characteristic provided to the receiving end and a channel characteristic in relation to the receiving end.

24. The apparatus of claim 23 , wherein the at least one processor is further configured to:

change a feedback mode for transmitting the HARQ feedback information of the receiving end; and

transmit feedback mode change information comprising an operation variable for the HARQ feedback, to the receiving end.

25. The apparatus of claim 24 , wherein the operation variable comprises at least one of the reference amount, a first reference time, a reference time for retransmission of the transmitting end, and a feedback mode change time.

26. The apparatus of claim 21 , wherein the HARQ feedback information comprises at least one of ACK indicating successful packet reception, NACK indicating packet reception failure, and discontinuous transmission (DTX) indicating no packet reception confirmed.