Method and apparatus for transmitting/receiving wireless signal in wireless communication system
The present disclosure relates to a wireless communication system and, more particularly, to a method and an apparatus therefor, the method comprising the steps of: detecting an SSB in an unlicensed band, the SSB including an index related to a CORESET configuration; determining, on the basis of the index, an RB offset used for identifying the position of a CORESET frequency associated with the SSB; and monitoring the CORESET in the unlicensed band on the basis of the RB offset.
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a synchronization signal/physical broadcast channel (SS/PBCH) block in an unlicensed band;
obtaining master information block (MIB) from the SS/PBCH block, wherein the MIB includes an index related to configuration of a control resource set (CORESET);
determining an offset from a smallest resource block (RB) index of the CORESET to a smallest RB index of the SS/PBCH block based on the index; and
based on the offset, monitoring a Type0-physical downlink control channel (PDCCH) common search space (CSS) set associated with the CORESET in the unlicensed band,
wherein, based on a subcarrier spacing (SCS) of the SS/PBCH block, the offset is determined as follows:
SCS of SS/PBCH
SCS of SS/PBCH
block = 30 kHz
block = 15 kHz
Index
offset
offset
n
0
10
n + 1
1
12
n + 2
2
14
where n represents an integer.
2. The method of claim 1 ,
wherein, based on that the offset corresponding to the SCS of 30 kHz is k, the offset corresponding to the SCS of 15 kHz is determined as 2*k+10,
where k represents an integer.
3. The method of claim 1 ,
wherein a center frequency of the SS/PBCH block corresponds to a synchronization raster.
4. The method of claim 1 , further comprising:
detecting a PDCCH from the Type-0 PDCCH CSS set based on the monitoring.
5. The method of claim 4 , further comprising:
receiving system information via a physical downlink shared channel (PDSCH) related to the PDCCH.
6. The method of claim 1 ,
wherein the offset is a RB-based offset.
7. A user equipment (UE) used in a wireless communication system, the UE comprising:
at least one transceiver;
at least one processor; and
at least one computer memory operably connected to the at least one processor and configured to, when executed, cause the at least one processor to perform operations comprising:
receiving a synchronization signal/physical broadcast channel (SS/PBCH) block in an unlicensed band;
obtaining master information block (MIB) from the SS/PBCH block, wherein the MIB includes an index related to configuration of a control resource set (CORESET);
determining an offset from a smallest resource block (RB) index of the CORESET to a smallest RB index of the SS/PBCH block based on the index; and
based on the offset, monitoring a Type0-physical downlink control channel (PDCCH) common search space (CSS) set associated with the CORESET in the unlicensed band,
wherein, based on a subcarrier spacing (SCS) of the SS/PBCH block, the offset is determined as follows:
SCS of SS/PBCH
SCS of SS/PBCH
block = 30 kHz
block = 15 kHz
Index
offset
offset
n
0
10
n + 1
1
12
n + 2
2
14
where n represents an integer.
8. The UE of claim 7 ,
wherein, based on that the offset corresponding to the SCS of 30 kHz is k, the offset corresponding to the SCS of 15 kHz is determined as 2*k+10,
where k represents an integer.
9. The UE of claim 7 ,
wherein a center frequency of the SS/PBCH block corresponds to a synchronization raster.
10. The UE of claim 7 ,
wherein the operations further comprise detecting a PDCCH from the Type-0 PDCCH CSS set based on the monitoring.
11. The UE of claim 10 ,
wherein the operations comprise receiving system information via a physical downlink shared channel (PDSCH) related to the PDCCH.
12. The UE of claim 7
wherein the offset is a RB-based offset.
13. An apparatus for a user equipment (UE), the apparatus comprising:
at least one processor; and
at least one computer memory operably connected to the at least one processor and configured to, when executed, cause the at least one processor to perform operations comprising:
receiving a synchronization signal/physical broadcast channel (SS/PBCH) block in an unlicensed band;
obtaining master information block (MIB) from the SS/PBCH block, wherein the MIB includes an index related to configuration of a control resource set (CORESET);
determining an offset from a smallest resource block (RB) index of the CORESET to a smallest RB index of the SS/PBCH block based on the index; and
based on the offset, monitoring a Type0-physical downlink control channel (PDCCH) common search space (CSS) set associated with the CORESET in the unlicensed band,
wherein, based on a subcarrier spacing (SCS) of the SS/PBCH block, the offset is determined as follows:
SCS of SSB = 30 kHz
SCS of SSB = 15 kHz
Index
offset
offset
n
0
10
n + 1
1
12
n + 2
2
14
where n represents an integer.
14. The apparatus of claim 13 ,
wherein, based on that the offset corresponding to the SCS of 30 kHz is k, the offset corresponding to the SCS of 15 kHz is determined as 2*k+10,
where k represents an integer.
15. The apparatus of claim 13 ,
wherein a center frequency of the SS/PBCH block corresponds to a synchronization raster.
16. The apparatus of claim 13 ,
wherein the operations further comprise detecting a PDCCH from the Type-0 PDCCH CSS set based on the monitoring.
17. The apparatus of claim 16 ,
wherein the operations comprise receiving system information via a physical downlink shared channel (PDSCH) related to the PDCCH.
18. The apparatus of claim 13 ,
wherein the offset is a RB-based offset.