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US 11,706,633 B2Granted
Method and apparatus for performing wireless communication in unlicensed band
AssigneeKt Corporation
InventorsKi-Hyeon Park, Ki-tae Kim
Life of this patent
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Abstract
Provided are a method and a device performing wireless communication in an unlicensed band, which receives information on allocating a radio resource in a system bandwidth made up of a plurality of subbands, receives information on a LBT (Listen Before Talk) failure region among the radio resource, and receives a downlink signal in other regions in the radio resource, except the LBT failure region.
Claims13
A wireless device, comprising:
- a transmitter;
- a receiver;
- and
- a controller which controls one or more of the transmitter and the receiver to:
- receive, from a base station, configuration information about a plurality of subbands in an unlicensed band;
- and
- receive, from the base station, downlink control information (DCI) including a bitmap,
- wherein each bit in the bitmap indicates an availability or unavailability for a reception in a corresponding subband,
- wherein based on the bitmap indicating at least one subband as available for the reception, the wireless device is able to receive a downlink signal from the base station,
- wherein based on that all subbands in the bitmap are determined as unavailable for the reception, the wireless device does not receive a channel state information reference signal (CSI-RS), and
- wherein the DCI further includes information indicating whether a listen before talk (LBT) succeeds for each of the plurality of subbands.
8 more elements
An apparatus for a wireless device, comprising:
- a controller which controls one or more of a transmitter and a receiver of the wireless device to:
- receive, from a base station, configuration information about a plurality of subbands in an unlicensed band;
- and
- receive, from the base station, downlink control information (DCI) including a bitmap,
- wherein each bit in the bitmap indicates an availability or unavailability for a reception in a corresponding subband,
- wherein based on the bitmap indicating at least one subband as available for the reception, the wireless device is able to receive a downlink signal from the base station,
- wherein based on that all subbands in the bitmap are determined as unavailable for the reception, the wireless device does not receive a channel state information reference signal (CSI-RS), and
- wherein the DCI further includes information indicating whether a listen before talk (LBT) succeeds for each of the plurality of subbands.
5 more elements
A base station, comprising:
- a transmitter;
- a receiver;
- and
- a controller which controls one or more of the transmitter and receiver to:
- transmit, to a wireless device, configuration information about a plurality of subbands in an unlicensed band;
- and
- transmit, to the wireless device, downlink control information (DCI) including a bitmap,
- wherein each bit in the bitmap indicates an availability or unavailability for a reception in a corresponding subband,
- wherein based on the bitmap indicating at least one subband as available for the reception, the wireless device is able to receive a downlink signal from the base station,
- wherein based on that all subbands in the bitmap are determined as unavailable for the reception, the wireless device does not receive a channel state information reference signal (CSI-RS), and
- wherein the DCI further includes information indicating whether a listen before talk (LBT) succeeds for each of the plurality of subbands.
8 more elements
Dependencies are inferred from the claim text.