# US 12,193,054 B2 · Contention resolution window size based on uplink carrier switching > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,193,054 B2 - Document ID: US12193054B2 - Status: Granted - Kind: B2 - Application number: 18/230,217 - Filed: 2023-08-04 - Published: 2024-06-20 - Granted: 2025-01-07 - Earliest claimed: 2018-08-09 - Assignees: Ofinno, LLC - Applicants: Ofinno, LLC - Inventors: Alireza Babaei; Esmael Hejazi Dinan; Hyoungsuk Jeon; Hua Zhou; Ali Cagatay Cirik; Kyungmin Park - Web page: https://patentgrep.com/patent/US12193054B2 ## CPC - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04W 16/04: Traffic adaptive resource partitioning - H04W 48/12: using downlink control channel - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A wireless device may receive one or more radio resource control (RRC) messages comprising configuration parameters of a first uplink carrier and a second uplink carrier of an unlicensed cell. Based on switching from the first uplink carrier to the second uplink carrier and a priority class of a listen-before-talk (LBT) procedure for a first transmission of a transport block on the second uplink carrier, the wireless device may determine a contention window to be a minimum contention window of a plurality of contention windows for the LBT procedure. The wireless device may transmit, via the second uplink carrier, the transport block based on the LBT procedure using the contention window. ## Claims ### Claim 1 A method comprising: receiving, by a wireless device, one or more radio resource control (RRC) messages comprising configuration parameters of a first uplink carrier and a second uplink carrier of an unlicensed cell; based on switching from the first uplink carrier to the second uplink carrier and a priority class of a listen-before-talk (LBT) procedure for a first transmission of a transport block on the second uplink carrier, determining a contention window to be a minimum contention window of a plurality of contention windows for the LBT procedure; and transmitting, via the second uplink carrier, the transport block based on the LBT procedure using the contention window. ### Claim 2 (depends on 1) The method of claim 1, wherein: the first uplink carrier is a normal uplink (NUL) carrier; and the second uplink carrier is a supplementary uplink (SUL) carrier. ### Claim 3 (depends on 1) The method of claim 1, wherein: the first uplink carrier is a supplementary uplink (SUL) carrier; and the second uplink carrier is a normal uplink (NUL) carrier. ### Claim 4 (depends on 1) The method of claim 1, wherein the first transmission is an initial transmission of the transport block. ### Claim 5 (depends on 1) The method of claim 1, further comprising receiving an uplink grant for the first transmission of the transport block, wherein the uplink grant indicates that the first transmission is an initial transmission of the transport block. ### Claim 6 (depends on 1) The method of claim 1, further comprising determining a second contention window, based on the priority class and from the plurality of contention windows, for a second LBT procedure on the first uplink carrier. ### Claim 7 (depends on 1) The method of claim 1, wherein the priority class is a channel access priority class. ### Claim 8 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 one or more radio resource control (RRC) messages comprising configuration parameters of a first uplink carrier and a second uplink carrier of an unlicensed cell; based on switching from the first uplink carrier to the second uplink carrier and a priority class of a listen-before-talk (LBT) procedure for a first transmission of a transport block on the second uplink carrier, determine a contention window to be a minimum contention window of a plurality of contention windows for the LBT procedure; and transmit, via the second uplink carrier, the transport block based on the LBT procedure using the contention window. ### Claim 9 (depends on 8) The wireless device of claim 8, wherein: the first uplink carrier is a normal uplink (NUL) carrier; and the second uplink carrier is a supplementary uplink (SUL) carrier. ### Claim 10 (depends on 8) The wireless device of claim 8, wherein: the first uplink carrier is a supplementary uplink (SUL) carrier; and the second uplink carrier is a normal uplink (NUL) carrier. ### Claim 11 (depends on 8) The wireless device of claim 8, wherein the first transmission is an initial transmission of the transport block. ### Claim 12 (depends on 8) The wireless device of claim 8, wherein: the instructions further cause the wireless device to receive an uplink grant for the first transmission of the transport block; and the uplink grant indicates that the first transmission is an initial transmission of the transport block. ### Claim 13 (depends on 8) The wireless device of claim 8, wherein the instructions further cause the wireless device to determine a second contention window, based on the priority class and from the plurality of contention windows, for a second LBT procedure on the first uplink carrier. ### Claim 14 (depends on 8) The wireless device of claim 8, wherein the priority class is a channel access priority class. ### Claim 15 A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to: receive one or more radio resource control (RRC) messages comprising configuration parameters of a first uplink carrier and a second uplink carrier of an unlicensed cell; based on switching from the first uplink carrier to the second uplink carrier and a priority class of a listen-before-talk (LBT) procedure for a first transmission of a transport block on the second uplink carrier, determine a contention window to be a minimum contention window of a plurality of contention windows for the LBT procedure; and transmit, via the second uplink carrier, the transport block based on the LBT procedure using the contention window. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein: the first uplink carrier is a normal uplink (NUL) carrier; and the second uplink carrier is a supplementary uplink (SUL) carrier. ### Claim 17 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein: the first uplink carrier is a supplementary uplink (SUL) carrier; and the second uplink carrier is a normal uplink (NUL) carrier. ### Claim 18 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the first transmission is an initial transmission of the transport block. ### Claim 19 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein: the instructions further cause the wireless device to receive an uplink grant for the first transmission of the transport block; and the uplink grant indicates that the first transmission is an initial transmission of the transport block. ### Claim 20 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the instructions further cause the wireless device to determine a second contention window, based on the priority class and from the plurality of contention windows, for a second LBT procedure on the first uplink carrier.