Channel access and bandwidth part switching
AssigneeOfinno, LLC
InventorsAlireza Babaei, Esmael Dinan, Hyoungsuk Jeon, Hua Zhou, Ali Cirik, Kyungmin Park
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Abstract
A wireless device receives configuration parameters of a first bandwidth part and a second bandwidth part of an unlicensed cell. An active bandwidth part is switched from the first bandwidth part to the second bandwidth part. A first contention window size determined based on the switching. Based on the first contention window size, a listen before talk procedure is performed for transmission of a transport block in one or more subbands of the second bandwidth part. A transport block is transmitted based on a listen before talk procedure indicating a clear channel.
Claims20
A method comprising:
- receiving, by a wireless device, configuration parameters of a first bandwidth part (BWP) and a second BWP of an unlicensed cell;
- determining, based on hybrid automatic repeat request (HARQ) feedback of one or more transmissions via a first channel of the first BWP, a first contention window for a first listen before talk (LBT) procedure for the first BWP;
- switching from the first BWP to the second BWP as an active BWP;
- based on the switching, determining a second contention window to be a minimum contention window of a plurality of contention windows, wherein the second contention window is for a second LBT procedure of a second channel of the second BWP;
- and
- transmitting, via the second BWP, a transport block based on the second LBT procedure using the determined second contention window and indicating a clear channel.
A wireless device comprising:
- one or more processors;
- and
- memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
- receive configuration parameters of a first bandwidth part (BWP) and a second BWP of an unlicensed cell;
- determine, based on hybrid automatic repeat request (HARQ) feedback of one or more transmissions via a first channel of the first BWP, a first contention window for a first listen before talk (LBT) procedure for the first BWP;
- switch from the first BWP to the second BWP as an active BWP;
- based on the switching, determine a second contention window to be a minimum contention window of a plurality of contention windows, wherein the second contention window is for a second LBT procedure of a second channel of the second BWP;
- and
- transmit, via the second BWP, a transport block based on the second LBT procedure using the determined second contention window and indicating a clear channel.
A system comprising:
- a base station;
- and
- a wireless device comprising:
- one or more processors;
- and
- memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
- receive, from the base station, configuration parameters of a first bandwidth part (BWP) and a second BWP of an unlicensed cell;
- determine, based on hybrid automatic repeat request (HARQ) feedback of one or more transmissions via a first channel of the first BWP, a first contention window for a first listen before talk (LBT) procedure for the first BWP;
- switch from the first BWP to the second BWP as an active BWP;
- based on the switching, determine a second contention window size based a reference duration associated with to be a minimum contention window of a plurality of contention windows, wherein the second contention window is for a second LBT procedure of a second channel of the second BWP;
- and
- transmit, to the base station and via the second BWP, a transport block based on the second LBT procedure using the determined second contention window and indicating a clear channel.
Dependencies are inferred from the claim text.