Method, device, and system for cancelling uplink transmission in wireless communication system
View Patent ↗Disclosed is a method in which a user equipment receives downlink control information in a wireless communication system. The user equipment may receive configuration information for reception of a physical downlink control channel (PDCCH) from a base station, and may receive a PDCCH including downlink control information (DCI) on the basis of the configuration information.
1. A user equipment (UE) configured to operate in a wireless communication system, the user equipment comprising:
a communication module; and
a processor configured to control the communication module,
wherein the processor is configured to,
receive radio resource control (RRC) configuration information, and
receive a physical downlink control channel (PDCCH) including a downlink control information (DCI),
wherein the DCI includes an uplink cancellation indication(UL CI) indicating cancellation or non-cancellation of UL transmission in a UL bandwidth part (BWP),
wherein the RRC configuration information includes a resource indication value (RIV) related to a reference resource region,
wherein the RIV is related to an index of a starting resource block (RB) and a number of consecutive RBs,
wherein the index of the starting RB is used to determine an index of a starting physical resource block (PRB) of the reference resource region,
wherein the RIV related to the reference resource region is interpreted under an assumption that a size of the UL BWP is 275 RBs, and
wherein a symbol parameter related to resources for which the cancellation or non-cancellation of the UL transmission is indicated by the UL CI in the reference resource region is determined by a subcarrier spacing of a downlink (DL) BWP in which the DCI is monitored.
2. The user equipment of claim 1 ,
wherein the resources in the reference resource region includes at least one symbol excluding DL symbols and symbols for a synchronization signal (SS)/a physical broadcast channel (PBCH) from the reference resource region, and
wherein a number of symbols in the reference resource region is determined based on a monitoring periodicity for monitoring the PDCCH or on a predetermined value.
3. The user equipment of claim 1 ,
wherein a starting symbol in the reference resource region is a symbol positioned after “X” symbols from a symbol in which the PDCCH is received.
4. The user equipment of claim 3 ,
wherein the value of “X” is determined based on a subcarrier spacing, and
wherein the first subcarrier spacing is a smallest value between the subcarrier spacing of the DL BWP in which the DCI is monitored and a smallest subcarrier spacing among subcarrier spacings of uplink cells.
5. The user equipment of claim 1 , wherein the resources for the cancellation or the non-cancellation of the UL transmission includes a plurality of resource of which the cancellation of the non-cancellation is indicated by respective bits of the UL CI.
6. The user equipment of claim 1 , wherein the resources for the cancellation or the non-cancellation of the UL transmission includes a plurality of first groups on a time domain, each of which includes at least one symbol and at least one second group on a frequency domain, each of which includes at least one physical resource block (PRB).
7. The user equipment of claim 1 ,
wherein, when scheduling information for a physical uplink shared channel (PUSCH) transmission is received before the DCI including the UL CI, and a region where the cancellation is indicated by the UL CI in the resources overlaps with some or all symbols of UL resources allocated for the PUSCH transmission according to the scheduling information, the PUSCH transmission is cancelled.
8. The user equipment of claim 1 ,
wherein the index of the starting PRB of the reference resource region is obtained by adding an offset value to the index of the starting RB.
9. A method for receiving downlink control information (DCI) in a wireless communication system, the method comprising:
receiving radio resource control (RRC) configuration information; and
receiving a physical downlink control channel (PDCCH) including a DCI,
wherein the DCI includes an uplink cancellation indication(UL CI) indicating cancellation or non-cancellation of UL transmission in a UL bandwidth part (BWP),
wherein the RRC configuration information includes a resource indication value (RIV) related to a reference resource region,
wherein the RIV is related to an index of a starting resource block (RB) and a number of consecutive RBs,
wherein the index of the starting RB is used to determine an index of a starting physical resource block (PRB) of the reference resource region,
wherein the RIV related to the reference resource region is interpreted under an assumption that a size of the UL BWP is 275 RBs, and
wherein a symbol parameter related to resources for which the cancellation or non-cancellation of the UL transmission is indicated by the UL CI in the reference resource region is determined by a subcarrier spacing of a downlink (DL) BWP in which the DCI is monitored.
10. The method of claim 9 ,
wherein the resources in the reference resource region includes at least one symbol excluding DL symbols and symbols for a synchronization signal (SS)/a physical broadcast channel (PBCH) from the reference resource region, and
wherein a number of symbols in the reference resource region is determined based on a monitoring periodicity for monitoring the PDCCH or on a predetermined value.
11. The method of claim 9 ,
wherein a starting symbol in the reference resource region is a symbol positioned after “X” symbols from a symbol in which the PDCCH is received.
12. The method of claim 11 ,
wherein the value of “X” is determined based on a subcarrier spacing, and
wherein the subcarrier spacing is a smallest value between the subcarrier spacing of the DL BWP in which the DCI is monitored and a smallest subcarrier spacing among subcarrier spacings of uplink cells.
13. The method of claim 9 , wherein the resources for the cancellation or the non-cancellation of the UL transmission includes a plurality of resources of which the cancellation or the non-cancellation is indicated by respective bits of the UL CI.
14. The method of claim 9 , wherein the resources for the cancellation or the non-cancellation of the UL transmission includes a plurality of first groups on a time domain, each of which includes at least one symbol and at least one second group on a frequency domain, each of which includes at least one physical resource block (PRB).
15. The method of claim 9 ,
wherein, when scheduling information for a physical uplink shared channel (PUSCH) transmission is received before the DCI including the UL CI, and a region where the cancellation is indicated by the UL CI in the resources overlaps with some or all symbols of UL resources allocated for the PUSCH transmission according to the scheduling information, the PUSCH transmission is cancelled.
16. The method of claim 9 ,
wherein the index of the starting PRB of the reference resource region is obtained by adding an offset value to the index of the starting RB.