# US 12,225,580 B2 · Method and UE for uplink transmission in base station shared channel occupancy time > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,580 B2 - Document ID: US12225580B2 - Status: Granted - Kind: B2 - Application number: 17/805,203 - Filed: 2022-06-02 - Published: 2022-09-15 - Granted: 2025-02-11 - Earliest claimed: 2019-12-03 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Hao Lin - Web page: https://patentgrep.com/patent/US12225580B2 ## CPC - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04L 27/2607: {Cyclic extensions} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method and UE for determining a CPE, and a computer readable medium are provided. The method includes: determining the CPE based on a first information amongst at least one of the following: (i) CPE indication carried in a first DCI, if an UL transmission is scheduled with the first DCI; or (ii) CPE indication configured in a UE-specific RRC configuration; or (iii) CPE indication configured in cell-specific configuration; or (iv) CPE indication carried in a second DCI; or (v) CPE indication carried in a third DCI; or (vi) CPE indication carried in RAR; or (vii) pre-defined CPE indication; or determining CPE based on a second information amongst at least one of the following: (i) frequency domain resource allocation (FDRA) for the UL transmission; or (ii) time domain resource allocation (TDRA) for the UL transmission; or (iii) slot format indicator (SFI); or (iv) COT information. ## Claims ### Claim 1 A method, performed by a user equipment (UE), for determining a cyclic prefix extension (CPE) when the UE switches a Listen-Before-Talk (LBT) category of the UE from a first LBT category to a second LBT category in base station channel occupancy time (gNB COT), comprising: determining the CPE based on a first information amongst at least one of the following: CPE indication carried in a first downlink control information (DCI), if an uplink (UL) transmission is scheduled with the first DCI; or pre-defined CPE indication. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first DCI is chosen amongst one of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_0, or DCI format 1_0. ### Claim 3 (depends on 2) The method according to claim 2, wherein the CPE is indicated in the first DCI, the method further comprising: using the indicated CPE when performing the second LBT category in gNB COT. ### Claim 4 (depends on 2) The method according to claim 2, wherein the CPE is indicated in the first DCI, the method further comprising: using the indicated CPE when UE performs the second LBT category in gNB COT, if a first condition is satisfied, the first condition being that the indicated CPE contains a gap duration which is equal to a first gap duration of the second LBT category. ### Claim 5 (depends on 4) The method according to claim 4, wherein the first gap duration is 25 us or 16 us. ### Claim 6 (depends on 1) The method according to claim 1, further comprising: determining the CPE, when performing the second LBT category in gNB COT, by a predefined CPE. ### Claim 7 (depends on 6) The method according to claim 6, wherein the predefined CPE is a direct CPE value or a predefined CPE formula with parameters being further determined by UE-specific or cell-specific RRC configurations. ### Claim 8 (depends on 1) The method according to claim 1, wherein the first LBT category is type1-UL channel access or Category 4 (Cat4), the second LBT category is type 2C UL channel access or type 2B channel access or type 2A channel access. ### Claim 9 (depends on 8) The method according to claim 8, wherein the type 2C UL channel access is category 1 (Cat1) with 16 μs gap duration, the type 2B channel access is category 2 with 16 μs gap duration and the type 2A channel access is category 2 (Cat2) with 25 μs gap duration. ### Claim 10 A user equipment (UE), operable for determining a cyclic prefix extension (CPE) when the UE switches a Listen-Before-Talk (LBT) category of the UE from a first LBT category to a second LBT category in base station channel occupancy time (gNB COT), comprising one or more processors configured to: determine the CPE based on a first information amongst at least one of the following: CPE indication carried in a first downlink control information (DCI), if an uplink (UL) transmission is scheduled with the first DCI; or pre-defined CPE indication. ### Claim 11 (depends on 10) The UE according to claim 10, wherein the first DCI is chosen amongst one of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_0, or DCI format 1_0. ### Claim 12 (depends on 11) The UE according to claim 11, wherein the CPE is indicated in the first DCI, and the one or more processors are further configured to: use the indicated CPE when performing the second LBT category in gNB COT. ### Claim 13 (depends on 11) The UE according to claim 11, wherein the CPE is indicated in the first DCI, and the one or more processors are further configured to: use the indicated CPE when the UE performs the second LBT category in gNB COT, if a first condition is satisfied, the first condition being that the indicated CPE contains a gap duration which is equal to a first gap duration of the second LBT category. ### Claim 14 (depends on 13) The UE according to claim 13, wherein the first gap duration is 25 us or 16 us. ### Claim 15 (depends on 10) The UE according to claim 10, wherein the one or more processors are further configured to: determine the CPE, when performing the second LBT category in gNB COT, by a predefined CPE. ### Claim 16 (depends on 15) The UE according to claim 15, wherein the predefined CPE is a direct CPE value or a predefined CPE formula with parameters being further determined by UE- specific or cell-specific RRC configurations. ### Claim 17 (depends on 10) The UE according to claim 10, wherein the first LBT category is type1-UL channel access or Category 4 (Cat4), the second LBT category is type 2C UL channel access or type 2B channel access or type 2A channel access. ### Claim 18 (depends on 17) The UE according to claim 17, wherein the type 2C UL channel access is category 1 (Cat1) with 16 μs gap duration, the type 2B channel access is category 2 with 16 μs gap duration and the type 2A channel access is category 2 (Cat2) with 25 μs gap duration. ### Claim 19 A non-transitory computer readable medium comprising program instructions for causing a user equipment (UE) to perform a method for determining a cyclic prefix extension (CPE) when the UE switches a Listen-Before-Talk (LBT) category of the UE from a first LBT category to a second LBT category in base station channel occupancy time (gNB COT), the method comprising: determining the (CPE) based on a first information amongst at least one of the following: pre-defined CPE indication. ### Claim 20 (depends on 19) The non-transitory computer readable medium according to claim 19, wherein the first DCI is chosen amongst one of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_0, or DCI format 1_0.