Apparatus and methods for LBT in a BWP

1. A terminal apparatus for performing a listen-before-talk (LBT) procedure in a bandwidth part (BWP), the terminal apparatus comprising:

one or more non-transitory computer-readable media having computer-executable instructions embodied thereon; and

at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor being configured to execute the computer-executable instructions to:

configure a plurality of control resource sets based on radio resource control (RRC) signaling, each of the plurality of control resource sets being a set of control channels to be monitored by the terminal apparatus;

monitor a plurality of physical downlink control channels (PDCCHs) in the plurality of control resource sets; and

decode the plurality of PDCCHs, wherein:

each of the plurality of control resource sets is configured for a corresponding one of a plurality of LBT subbands in a bandwidth part (BWP), and

each of the plurality of LBT subbands is a specific subband of the BWP.

2. The terminal apparatus according to claim 1 , wherein in each of the plurality of control resource sets, a PDCCH of the plurality of PDCCHs is received and includes control information indicating a subframe configuration of a corresponding LBT subband of the plurality of LBT subbands.

3. The terminal apparatus according to claim 1 , wherein each of the plurality of control resource sets is configured by using a plurality of resource blocks in a corresponding LBT subband of the plurality of LBT subbands.

4. A communication method used in a terminal apparatus for performing a listen-before-talk (LBT) procedure in a bandwidth part (BWP), the communication method comprising:

configuring a plurality of control resource sets based on radio resource control (RRC) signaling, each of the plurality of control resource sets being a set of control channels to be monitored by the terminal apparatus;

monitoring a plurality of physical downlink control channels (PDCCHs) in the plurality of control resource sets; and

decoding the plurality of PDCCHs, wherein:

each of the plurality of control resource sets is configured for a corresponding one of a plurality of LBT subbands in a bandwidth part (BWP), and

each of the plurality of LBT subbands is a specific subband of the BWP.

5. The communication method according to claim 4 , wherein in each of the plurality of control resource sets, a PDCCH of the plurality of PDCCHs is received and includes control information indicating a subframe configuration of a corresponding LBT subband of the plurality of LBT subbands.

6. The communication method according to claim 4 , wherein each of the plurality of control resource sets is configured by using a plurality of resource blocks in a corresponding LBT subband of the plurality of LBT subbands.

7. A base station apparatus for configuring a listen-before-talk (LBT) procedure in a bandwidth part (BWP), the base station apparatus comprising:

one or more non-transitory computer-readable media having computer-executable instructions embodied thereon; and

at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor being configured to execute the computer-executable instructions to:

configure a plurality of control resource sets for a terminal apparatus, each of the plurality of control resource sets being a set of control channels to be monitored by the terminal apparatus; and

transmit a plurality of physical downlink control channels (PDCCHs) in the plurality of control resource sets, wherein:

each of the plurality of control resource sets is configured for a corresponding one of a plurality of LBT subbands in a bandwidth part (BWP) for the terminal apparatus to perform the LBT procedure, and

each of the plurality of LBT subbands is a specific subband of the BWP.

8. The base station apparatus according to claim 7 , wherein in each of the plurality of control resource sets, a PDCCH of the plurality of PDCCHs is transmitted and includes control information indicating a subframe configuration of a corresponding LBT subband of the plurality of LBT subbands.

9. The base station apparatus according to claim 7 , wherein each of the plurality of control resource sets is configured by using a plurality of resource blocks in a corresponding LBT subband of the plurality of LBT subbands.

10. A communication method used in a base station apparatus for configuring a listen-before-talk (LBT) procedure in a bandwidth part (BWP), the communication method comprising:

configuring a plurality of control resource sets for a terminal apparatus, each of the plurality of control resource sets being a set of control channels to be monitored by the terminal apparatus; and

transmitting a plurality of physical downlink control channels (PDCCHs) in the plurality of control resource sets, wherein:

each of the plurality of control resource sets is configured for a corresponding one of a plurality of LBT subbands in a bandwidth part (BWP) for the terminal apparatus to perform the LBT procedure, and

each of the plurality of LBT subbands is a specific subband of the BWP.

11. The communication method according to claim 10 , wherein in each of the plurality of control resource sets, a PDCCH of the plurality of PDCCHs is transmitted and includes control information indicating a subframe configuration of a corresponding LBT subband of the plurality of LBT subbands.

12. The communication method according to claim 10 , wherein each of the plurality of control resource sets is configured by using a plurality of resource blocks in a corresponding LBT subband of the plurality of LBT subbands.