Method and device for transmitting and receiving wireless signal in wireless communication system
The present disclosure relates to: a method comprising: a step for receiving a synchronization signal/public broadcast channel (SS/PBCH) block within a plurality of SS/PBCH block candidates located on an unlicensed band; and a step for obtaining time synchronization on the basis of the SS/PBCH block, wherein on the basis of subcarrier spacing (SCS) of the SS/PBCH block being set to 240 kHz, the plurality of SS/PBCH block candidates are located in both a first half section and a second half section of a time window set for transmission of the SS/PBCH block; and a device therefor.
1. A method of receiving downlink signal by a user equipment (UE) in a wireless communication system supporting an unlicensed band, the method comprising:
receiving information on a QCL relationship between SS/PBCH block candidates,
receiving information representing a position in which a SS/PBCH block is transmitted within a predetermined time duration,
wherein the information includes a first 8-bit bitmap representing groups in which each of the groups includes a plurality of SS/PBCH block candidates within the predetermined time duration and a second 8-bit bitmap representing the plurality of SS/PBCH block candidates included in each of the group,
receiving, through the unlicensed band, the SS/PBCH block in the position determined based on a combination of the first 8-bit bitmap and the second 8-bit bitmap,
wherein, based on that a value determined based on the information on the QCL relationship is 32, bits other than 4 leftmost bits in the first 8-bit bitmap is set to zero.
2. The method of claim 1 ,
wherein the predetermined time duration includes 8 groups and each of the groups includes 8 SS/PBCH block candidates.
3. The method of claim 1 ,
wherein the 4 leftmost bits in the first bitmap are valid.
4. The method of claim 1 ,
wherein the SS/PBCH block is received through the unlicensed band within a specific frequency range including 60 GHz frequency band.
5. The method of claim 1 ,
wherein the information on the QCL relationship is received through a higher layer signaling.
6. The method of claim 1 ,
wherein the predetermined time duration is a half frame.
7. A user equipment (UE) configured to receive a downlink signal in a wireless communication system supporting an unlicensed band, the UE comprising:
at least one radio frequency (RF) unit;
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 information on a QCL relationship between SS/PBCH block candidates,
receiving information representing a position in which a SS/PBCH block is transmitted within a predetermined time duration,
wherein the information includes a first 8-bit bitmap representing groups in which each of the groups includes a plurality of SS/PBCH block candidates within the predetermined time duration and a second 8-bit bitmap representing the plurality of SS/PBCH block candidates included in each of the group,
receiving, through the unlicensed band, the SS/PBCH block in the position determined based on a combination of the first 8-bit bitmap and the second 8-bit bitmap,
wherein, based on that a value determined based on the information on the QCL relationship is 32, bits other than 4 leftmost bits in the first 8-bit bitmap is set to zero.
8. The UE of claim 7 ,
wherein the predetermined time duration includes 8 groups and each of the groups includes 8 SS/PBCH block candidates.
9. The UE of claim 7 ,
wherein the 4 leftmost bits in the first bitmap are valid.
10. The UE of claim 7 ,
wherein the SS/PBCH block is received through the unlicensed band within a specific frequency range including 60 GHz frequency band.
11. The UE of claim 7 ,
wherein the information on the QCL relationship is received through a higher layer signaling.
12. The UE of claim 7 ,
wherein the predetermined time duration is a half frame.
13. A method of transmitting a downlink signal by a base station (BS) in a wireless communication system supporting an unlicensed band, the method comprising:
transmitting information on a QCL relationship between SS/PBCH block candidates,
transmitting information representing a position in which a SS/PBCH block is transmitted within a predetermined time duration,
wherein the information includes a first 8-bit bitmap representing groups in which each of the groups includes a plurality of SS/PBCH block candidates within the predetermined time duration and a second 8-bit bitmap representing the plurality of SS/PBCH block candidates included in each of the group,
transmitting, through the unlicensed band, the SS/PBCH block in the position determined based on a combination of the first 8-bit bitmap and the second 8-bit bitmap,
wherein, based on that a value determined based on the information on the QCL relationship is 32, bits other than 4 leftmost bits in the first 8-bit bitmap is set to zero.
14. A base station (BS) configured to transmit a downlink signal in a wireless communication system supporting an unlicensed band, the UE comprising:
at least one radio frequency (RF) unit;
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:
transmitting information on a QCL relationship between SS/PBCH block candidates,
transmitting information representing a position in which a SS/PBCH block is transmitted within a predetermined time duration,
wherein the information includes a first 8-bit bitmap representing groups in which each of the groups includes a plurality of SS/PBCH block candidates within the predetermined time duration and a second 8-bit bitmap representing the plurality of SS/PBCH block candidates included in each of the group,
transmitting, through the unlicensed band, the SS/PBCH block in the position determined based on a combination of the first 8-bit bitmap and the second 8-bit bitmap,
wherein, based on that a value determined based on the information on the QCL relationship is 32, bits other than 4 leftmost bits in the first 8-bit bitmap is set to zero.