Method and apparatus for transmitting and receiving signal in wireless communication system
AssigneeLG Electronics Inc.
InventorsSuckchel YANG, Seonwook KIM, Sechang MYUNG, Duckhyun BAE
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Abstract
According to an embodiment of the present disclosure, a user equipment (UE) may obtain fixed frame period (FFP)-related information, and perform clear channel assessment (CCA) for at least one FFP starting with a UE-initiated channel occupancy time (COT) for transmission of an uplink signal. The FFP-related information may include information about an FFP starting offset and information about an FFP duration or period, and the UE may identify a starting time of the FFP, based on the FFP starting offset having an orthogonal frequency division multiplexing (OFDM) symbol-level granularity.
Claims14
A method of performing a channel access procedure on a shared spectrum by a user equipment (UE) in a wireless communication system, the method comprising:
- receiving, in a first period for a base station (BS)-initiated channel occupancy, downlink control information (DCI) for a scheduled uplink (UL) transmission, and
- performing a channel access procedure for the scheduled UL transmission associated with a UE-initiated channel occupancy,
- wherein, based on i) the scheduled UL transmission being confined in the first period for the BS-initiated channel occupancy and ii) the scheduled UL transmission being not time-aligned with a beginning of a second period for the UE-initiated channel occupancy:
- the UE performs the scheduled UL transmission based on that the UE has already initiated a channel occupancy in the second period.
A device for wireless communication, the device comprising:
- a memory configured to store instructions;
- and
- a processor configured to perform operations by executing the instructions, the operations comprising:
- receiving, in a first period for a base station (BS)-initiated channel occupancy, downlink control information (DCI) for a scheduled uplink (UL) transmission on a shared spectrum, and
- performing a channel access procedure for the scheduled UL transmission associated with a device-initiated channel occupancy,
- wherein, based on i) the scheduled UL transmission being confined in the first period for the BS-initiated channel occupancy and ii) the scheduled UL transmission being not time-aligned with a beginning of a second period for the device-initiated channel occupancy:
- the processor performs the scheduled UL transmission based on that the device has already initiated a channel occupancy in the second period.
A method of receiving a signal on a shared spectrum by a base station (BS) in a wireless communication system, the method comprising:
- transmitting, to a user equipment (UE) in a first period for a BS-initiated channel occupancy, downlink control information (DCI) for a scheduled uplink (UL) reception, and
- performing the scheduled UL reception associated with a UE-initiated channel occupancy,
- wherein, based on i) the scheduled UL reception being confined in the first period for the BS-initiated channel occupancy and ii) the scheduled UL reception being not time-aligned with a beginning of a second period for the UE-initiated channel occupancy:
- the BS performs the scheduled UL reception based on that the UE has already initiated a channel occupancy in the second period.
A base station (BS), the BS comprising:
- a transceiver;
- and
- a processor configured to control the transceiver to:
- transmit, to a user equipment (UE) in a first period for a BS-initiated channel occupancy, downlink control information (DCI) for a scheduled uplink (UL) reception on a shared spectrum, and
- perform the scheduled UL reception associated with a UE-initiated channel occupancy,
- wherein, based on i) the scheduled UL reception being confined in the first period for the BS-initiated channel occupancy and ii) the scheduled UL reception being not time-aligned with a beginning of a second period for the UE-initiated channel occupancy:
- the processor performs the scheduled UL reception based on that the UE has already initiated a channel occupancy in the second period.
Dependencies are inferred from the claim text.