Method for performing channel estimation in wireless communication system and apparatus therefor

1. A method of monitoring, by a user equipment (UE), non-overlapped control channel elements (CCEs) in a wireless communication system, the method comprising:

receiving, from a base station, configuration information for a physical downlink control channel (PDCCH);

transmitting, to the base station, UE capability information for a maximum number of non-overlapped CCEs that the UE can monitor per monitoring span;

monitoring non-overlapped CCEs based on the maximum number of non-overlapped CCEs,

wherein the UE capability information includes information related to at least one interval between monitoring spans per numerology, and

wherein the maximum number of non-overlapped CCEs is determined based on the at least one interval between monitoring spans and the numerology.

2. The method of claim 1 ,

wherein the maximum number of non-overlapped CCEs is determined based on a length of the monitoring span.

3. The method of claim 1 ,

wherein the maximum number of non-overlapped CCEs is determined based on at least one of a service type, quality of service (QoS), a service requirement and/or a processing time.

4. The method of claim 1 ,

wherein the maximum number of non-overlapped CCEs is determined based on at least one of a physical downlink shared channel (PDSCH) processing time and/or physical uplink shared channel (PUSCH) preparation time of the UE.

5. The method of claim 1 ,

wherein the maximum number of non-overlapped CCEs is determined based on at least one of a transport block size, number of layers and/or number of resource blocks of a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH).

6. The method of claim 1 ,

wherein a timing gap from the PDCCH to a physical downlink shared channel (PDSCH) is configured based on the maximum number of non-overlapped CCEs.

7. A user equipment (UE) configured to monitor non-overlapped control channel elements (CCEs) in a wireless communication system, the UE comprising:

a transceiver for transmitting and receiving radio signals, and

at least one processor functionally coupled to the transceiver,

wherein the at least one processor is configured to:

receive, from a base station, configuration information for a physical downlink control channel (PDCCH),

transmit, to the base station, UE capability information for a maximum number of non-overlapped CCEs that the UE can monitor per monitoring span, and

monitor non-overlapped CCEs based on the maximum number of non-overlapped CCEs,

wherein the UE capability information includes information related to at least one interval between monitoring spans per numerology, and

wherein the maximum number of non-overlapped CCEs is determined based on the at least one interval between monitoring spans and the numerology.

8. The UE of claim 7 ,

wherein the maximum number of non-overlapped CCEs is determined based on a length of the monitoring span.

9. The UE of claim 7 ,

wherein the maximum number of non-overlapped CCEs is determined based on at least one of a service type, quality of service (QoS), a service requirement and/or a processing time.

10. The UE of claim 7 ,

wherein the maximum number of non-overlapped CCEs is determined based on at least one of a physical downlink shared channel (PDSCH) processing time and/or physical uplink shared channel (PUSCH) preparation time of the UE.

11. The UE of claim 7 ,

wherein the maximum number of non-overlapped CCEs is determined based on at least one of a transport block size, number of layers and/or number of resource blocks of a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH).

12. The UE of claim 7 ,

wherein a timing gap from the PDCCH to a physical downlink shared channel (PDSCH) is configured based on the maximum number of non-overlapped CCEs.

13. A processing apparatus configured to control a user equipment (UE) to monitor non-overlapped control channel elements (CCEs) in a wireless communication system, the processing apparatus comprising:

at least one processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:

receiving, from a base station, configuration information for a physical downlink control channel (PDCCH);

transmitting, to the base station, UE capability information for a maximum number of non-overlapped CCEs that the UE can monitor per monitoring span; and

monitoring non-overlapped CCEs based on the maximum number of non-overlapped CCEs,

wherein the UE capability information includes information related to at least one interval between monitoring spans per numerology, and

wherein the maximum number of non-overlapped CCEs is determined based on the at least one interval between monitoring spans and the numerology.

14. A computer-readable storage medium storing at least one instruction which, when executed by at least one processor, perform operations comprising:

receiving, from a base station, configuration information for a physical downlink control channel (PDCCH),

transmitting, to the base station, user equipment (UE) capability information for a maximum number of non-overlapped control channel elements (CCEs) that a UE can monitor per monitoring span, and

monitoring non-overlapped CCEs based on the maximum number of non-overlapped CCEs,

wherein the UE capability information includes information related to at least one interval between monitoring spans per numerology, and

wherein the maximum number of non-overlapped CCEs is determined based on the at least one interval between monitoring spans and the numerology.