Control channel transmitting and receiving method and apparatus in wireless communication system

1. A method performed by a terminal in a communication system, the method comprising:

receiving, from a base station, configuration information for a preemption indication via higher layer signaling;

receiving, from the base station, downlink control information (DCI) including a preemption indicator on a physical downlink control channel (PDCCH), the preemption indicator being applied to a last period of associated with the PDCCH;

and

identifying that resources which are preempted are indicated by the preemption indicator,

wherein the preemption indicator indicates the resources in a unit of symbols based on a bitmap, and

wherein the unit of symbols is based on a period associated with the PDCCH.

2. The method of claim 1 , wherein the downlink control information is received based on a radio network temporary identifier (RNTI) for the preemption indicator.

3. The method of claim 1 , wherein uplink resources configured by the base station are excluded from the resources.

4. The method of claim 1 , wherein the configuration information includes information indicating a type for the unit of symbols and a unit of frequency band associated with the preemption indicator.

5. The method of claim 1 , further comprising:

discarding downlink data obtained based on the resources from a buffer.

6. The method of claim 1 ,

wherein the preemption indicator indicates the resources in a unit of a physical resource block (PRB) group based on the bitmap.

7. A method performed by a base station in a communication system, the method comprising:

transmitting, to a terminal, configuration information for a preemption indication via higher layer signaling; and

transmitting, to the terminal, downlink control information (DCI) including a preemption indicator indicating resources to be assumed as preempted on a physical downlink control channel (PDCCH),

wherein the preemption indicator is applied to a last period associated with the PDCCH,

wherein the preemption indicator indicates the resources in a unit of symbols based on a bitmap, and

wherein the unit of symbols is based on a period associated with the PDCCH.

8. The method of claim 7 , wherein the downlink control information is transmitted based on a radio network temporary identifier (RNTI) for the preemption indicator.

9. The method of claim 7 , wherein uplink resources configured by the base station are excluded from the resources.

10. The method of claim 7 , wherein the configuration information includes information indicating a type for the unit of symbols and a unit of frequency band associated with the preemption indicator.

11. The method of claim 7 ,

wherein the preemption indicator indicates the resources in a unit of a physical resource block (PRB) group based on the bitmap.

12. A terminal in a communication system, the terminal comprising:

a transceiver; and

a controller coupled with the transceiver and configured to:

receive, from a base station, configuration information for a preemption indication via higher layer signaling,

receive, from the base station, downlink control information (DCI) including a preemption indicator on a physical downlink control channel (PDCCH), the preemption indicator being applied to a last period associated with the PDCCH;

and

identify that resources which are preempted are indicated by the preemption indicator,

wherein the preemption indicator indicates the resources in a unit of symbols based on a bitmap, and

wherein the unit of symbols is based on a period associated with the PDCCH.

13. The terminal of claim 12 , wherein the downlink control information is received based on a radio network temporary identifier (RNTI) for the preemption indicator.

14. The terminal of claim 12 , wherein uplink resources configured by the base station are excluded from the resources.

15. The terminal of claim 12 , wherein the configuration information includes information indicating a type for the unit of symbols and a unit of frequency band associated with the preemption indicator.

16. The terminal of claim 12 , wherein the controller is further configured to discard downlink data obtained based on the resources from a buffer.

17. The terminal of claim 12 ,

wherein the preemption indicator indicates the resources in a unit of a physical resource block (PRB) group based on the bitmap.

18. A base station in a communication system, the base station comprising:

a transceiver; and

a controller coupled with the transceiver and configured to:

transmit, to a terminal, configuration information for a preemption indication via higher layer signaling, and

transmit, to the terminal, downlink control information (DCI) including a preemption indicator indicating resources to be assumed as preempted on a physical downlink control channel (PDCCH),

wherein the preemption indicator is applied to a last period associated with the PDCCH,

wherein the preemption indicator indicates the resources in a unit of symbols based on a bitmap, and

wherein the unit of symbols is based on a period associated with the PDCCH.

19. The base station of claim 18 , wherein the downlink control information is transmitted based on a radio network temporary identifier (RNTI) for the preemption indicator.

20. The base station of claim 18 , wherein uplink resources configured by the base station are excluded from the resources.

21. The base station of claim 18 , wherein the configuration information includes information indicating a type for the unit of symbols and a unit of frequency band associated with the preemption indicator.

22. The base station of claim 18 ,

wherein the preemption indicator indicates the resources in a unit of a physical resource block (PRB) group based on the bitmap.