Adaptive Retransmission Method and Device for Delay Reduction in Wireless Cellular Communication System

1. A method performed by a terminal for receiving a reference signal (RS) in a wireless communication system, the method comprising: receiving, from a base station, a control message including first information indicating that a first channel and a second channel share an RS on the first channel and second information configuring a transmission mode for the first channel and the second channel; receiving the RS on the first channel; identifying whether a first transmission mode for the first channel and a second transmission mode for the second channel support a sharing of the received RS; and receiving, in case that the first transmission mode and the second transmission mode support the sharing of the received RS, data on the second channel based on the RS received on the first channel.

2. The method of claim 1, wherein the control message comprises a radio resource control (RRC) signaling, and wherein the control message further includes information on a number of antenna ports to share the RS.

3. The method of claim 2, wherein a first antenna port for the first channel and a second antenna port for the second channel are different from each other, and wherein the first antenna port and the second antenna port are quasi co-located.

4. The method of claim 3, wherein the first channel is a control channel, and the second channel is a data channel, and wherein the first channel and the second channel are received in a slot.

5. A terminal for receiving a reference signal (RS) in a wireless communication system, the terminal comprising: a transceiver configured to transmit and receive signals; and a controller configured to: receive, from a base station, a control message including first information indicating that a first channel and a second channel share an RS on the first channel and second information configuring a transmission mode for the first channel and the second channel, receive the RS on the first channel, identify whether a first transmission mode for the first channel and a second transmission mode for the second channel support a sharing of the received RS, and receive, in case that the first transmission mode and the second transmission mode support the sharing of the received RS, data on the second channel based on the RS received on the first channel.

6. The terminal of claim 5, wherein the control message comprises a radio resource control (RRC) signaling, and wherein the control message further includes information on a number of antenna ports to share the RS.

7. The terminal of claim 6, wherein a first antenna port for the first channel and a second antenna port for the second channel are different from each other, and wherein the first antenna port and the second antenna port are quasi co-located.

8. The terminal of claim 7, wherein the first channel is a control channel, and the second channel is a data channel, and wherein the first channel and the second channel are received in a slot.

9. A method performed by a base station for transmitting a reference signal (RS) in a wireless communication system, the method comprising: transmitting, to a terminal, a control message including first information indicating that a first channel and a second channel share an RS on the first channel and second information configuring a transmission mode for the first channel and the second channel; and transmitting the RS to the terminal on the first channel, wherein, in case that a first transmission mode for the first channel and a second transmission mode for the second channel support are identified to support a sharing of the transmitted RS, the RS transmitted on the first channel is used for receiving of data on the second channel.

10. The method of claim 9, wherein the control message comprises a radio resource control (RRC) signaling, and wherein the control message further includes information on a number of antenna ports to share the RS.

11. The method of claim 10, wherein a first antenna port for the first channel and a second antenna port for the second channel are different from each other, and wherein the first antenna port and the second antenna port are quasi co-located.

12. The method of claim 11, wherein the first channel is a control channel, and the second channel is a data channel, and wherein the first channel and the second channel are transmitted in a slot.

13. A base station for transmitting a reference signal (RS) in a wireless communication system, the base station comprising: a transceiver configured to transmit and receive signals; and a controller configured to: transmit, to a terminal, a control message including first information indicating that a first channel and a second channel share an RS on the first channel and second information configuring a transmission mode for the first channel and the second channel, and transmit the RS to the terminal on the first channel, wherein in case that a first transmission mode for the first channel and a second transmission mode for the second channel support are identified to support a sharing of the transmitted RS, the RS transmitted on the first channel is used for receiving of data on the second channel.

14. The base station of claim 13, wherein the control message comprises a radio resource control (RRC) signaling, and wherein the control message further includes information on a number of antenna ports to share the RS.

15. The base station of claim 14, wherein a first antenna port for the first channel and a second antenna port for the second channel are different from each other, and wherein the first antenna port and the second antenna port are quasi co-located.

16. The base station of claim 15, wherein the first channel is a control channel, and the second channel is a data channel, and wherein the first channel and the second channel are transmitted in a slot.

17. A method performed by a user equipment (UE) in a communication system, the method comprising: receiving, from a base station, a configuration for disabling hybrid automatic repeat request (HARQ) feedback for a HARQ process identifier (ID) among a plurality of HARQ process IDs, through UE-specific radio resource control (RRC) signaling; and receiving, from the base station, data for the HARQ process ID among the plurality of HARQ process IDs, wherein the HARQ feedback associated with the data for the HARQ process ID among the plurality of HARQ process IDs is not performed.

18. The method of claim 17, wherein the HARQ process ID is included in downlink control information (DCI) associated with the data.

19. The method of claim 17, wherein the configuration for disabling the HARQ feedback comprises a plurality of bits, and the plurality of bits corresponds to the plurality of HARQ process IDs.

20. The method of claim 17, wherein the configuration for disabling the HARQ feedback is set per a HARQ process ID.

21. A method performed by a base station in a communication system, the method comprising: transmitting, to a user equipment UE a configuration for disabling hybrid automatic repeat request (HARQ) feedback for a HARQ process (ID) among a plurality of HARQ process IDs, through UE-specific radio resource control (RRC) signaling; and transmitting, to the UE, data for the HARQ process ID among the plurality of HARQ process IDs, wherein the HARQ feedback associated with the data for the HARQ process ID among the plurality of HARQ process IDs is not performed.

22. The method of claim 21, wherein the HARQ process ID is included in downlink control information (DCI) associated with the data.

23. The method of claim 21, wherein the configuration for disabling the HARQ feedback comprises a plurality of bits, and the plurality of bits corresponds to the plurality of HARQ process IDs.

24. The method of claim 21, wherein the configuration for disabling the HARQ feedback is set per a HARQ process ID.

25. A user equipment (UE) in a communication system, the UE comprising: a transceiver; and a controller configured to: receive, from a base station, a configuration for disabling hybrid automatic repeat request (HARQ) feedback for a HARQ process identifier (ID) among a plurality of HARQ process IDs, through UE-specific radio resource control (RRC) signaling, and receive, from the base station, data for the HARQ process ID among the plurality of HARQ process IDs, wherein the HARQ feedback associated with the data for the HARQ process ID among the plurality of HARQ process IDs is not performed.

26. The UE of claim 25, wherein the HARQ process ID is included in downlink control information (DCI) associated with the data.

27. The UE of claim 25, wherein the configuration for disabling the HARQ feedback comprises a plurality of bits, and the plurality of bits corresponds to the plurality of HARQ process IDs.

28. The UE of claim 25, wherein the configuration for disabling the HARQ feedback is set per a HARQ process ID.

29. A base station in a communication system, the base station comprising: a transceiver; and a controller configured to: transmit to a user equipment UE a configuration for disabling hybrid automatic repeat request (HARQ) feedback for a HARQ process identifier (ID) among a plurality of HARQ process IDs, through UE-specific radio resource control (RRC) signaling, and transmit, to the UE, data for the HARQ process ID among the plurality of HARQ process IDs, wherein the HARQ feedback associated with the data for the HARQ process ID among the plurality of HARQ process IDs is not performed.

30. The base station of claim 29, wherein the HARQ process ID is included in downlink control information (DCI) associated with the data.

31. The base station of claim 29, wherein the configuration for disabling the HARQ feedback comprises a plurality of bits, and the plurality of bits corresponds to the plurality of HARQ process IDs.

32. The base station of claim 29, wherein the configuration for disabling the HARQ feedback is set per a HARQ process ID.