# US 2025/0097976 A1 · Radio resource control and downlink control information signaling for listen-before-talk type > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0097976 A1 - Document ID: US20250097976A1 - Status: Published application - Kind: A1 - Application number: 18/291,720 - Filed: 2021-09-13 - Published: 2025-03-20 - Earliest claimed: 2021-09-13 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Giovanni CHISCI; Jing SUN; Vinay CHANDE; Arumugam CHENDAMARAI KANNAN; Siyi CHEN; Xiaoxia ZHANG - Web page: https://patentgrep.com/patent/US20250097976A1 ## CPC - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, an indication associated with performing listen-before-talk relative to a channel occupancy time (COT). Accordingly, the UE may transmit, to the base station, an uplink communication, where the uplink communication is transmitted using a listen-before-talk (LBT) procedure based at least in part on the indication. For example, the LBT procedure may be selected from a category 1 (Cat1) LBT procedure, a category 2 (Cat2) LBT procedure, or a category 3 (Cat3) LBT procedure based at least in part on the indication (e.g., included in a radio resource control message). The LBT procedure may be further based at least in part on downlink control information from the base station. Numerous other aspects are described. ## Claims ### Claim 1 An apparatus for wireless communication at a user equipment (UE), comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to: receive an indication associated with performing listen-before-talk relative to a channel occupancy time (COT); and transmit an uplink communication, wherein the uplink communication is transmitted using a listen-before-talk procedure based at least in part on the indication. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the indication is included in a radio resource control (RRC) message. ### Claim 3 (canceled) ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the uplink communication is associated with a dynamic grant. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to: receive an indication of the COT, wherein the listen-before-talk procedure is based at least in part on the indication of the COT. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the listen-before-talk (LBT) procedure is a category 1 (Cat1) LBT procedure based at least in part on the indication of the COT. ### Claim 7 (depends on 5) The apparatus of claim 5, wherein the listen-before-talk (LBT) procedure is a category 2 (Cat2) LBT procedure based at least in part on the indication of the COT. ### Claim 8 (depends on 5) The apparatus of claim 5, wherein the one or more processors are further configured to: determine a gap between an end of a downlink period and a beginning of an uplink period, wherein the listen-before-talk (LBT) procedure is a category 1 (Cat1) LBT procedure or a category 2 (Cat2) LBT procedure based at least in part on the gap. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to: receive downlink control information (DCI) that indicates a listen-before-talk type, wherein the listen-before-talk procedure is based at least in part on the DCI. ### Claim at position 10 10-13. (canceled) ### Claim 14 (depends on 9) The apparatus of claim 9, wherein the one or more processors are further configured to: receive an indication of the COT, wherein the listen-before-talk (LBT) procedure is a category 1 (Cat1) LBT procedure based at least in part on the DCI and the indication of the COT. ### Claim 15 (depends on 9) The apparatus of claim 9, wherein the one or more processors are further configured to: receive an indication of the COT, wherein the listen-before-talk (LBT) procedure is a category 2 (Cat2) LBT procedure based at least in part on the DCI and the indication of the COT. ### Claim at position 13 16-17. (canceled) ### Claim 18 An apparatus for wireless communication at a network node, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to: transmit an indication associated with performing listen-before-talk relative to a channel occupancy time (COT); and receive an uplink communication, wherein the uplink communication was transmitted using a listen-before-talk procedure based at least in part on the indication. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the indication is included in a radio resource control (RRC) message. ### Claim 20 (depends on 18) The apparatus of claim 18, wherein the uplink communication is associated with a dynamic grant. ### Claim 21 (depends on 18) The apparatus of claim 18, wherein the one or more processors are further configured to: transmit an indication of the COT, wherein the listen-before-talk procedure is based at least in part on the indication of the COT. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the listen-before-talk (LBT) procedure is a category 1 (Cat1) LBT procedure based at least in part on the indication of the COT. ### Claim 23 (depends on 21) The apparatus of claim 21, wherein the listen-before-talk (LBT) procedure is a category 2 (Cat2) LBT procedure based at least in part on the indication of the COT. ### Claim 24 (depends on 21) The apparatus of claim 21, wherein the listen-before-talk (LBT) procedure is a category 1 (Cat1) LBT procedure or a category 2 (Cat2) LBT procedure based at least in part on a gap between an end of a downlink period and a beginning of an uplink period. ### Claim 25 (depends on 18) The apparatus of claim 18, wherein the one or more processors are further configured to: transmit downlink control information (DCI) that indicates a listen-before-talk type, wherein the listen-before-talk procedure is based at least in part on the DCI. ### Claim at position 22 26-33. (canceled) ### Claim 34 A method of wireless communication performed by a user equipment (UE), comprising: receiving an indication associated with performing listen-before-talk relative to a channel occupancy time (COT); and transmitting an uplink communication, wherein the uplink communication is transmitted using a listen-before-talk procedure based at least in part on the indication. ### Claim 35 (canceled) ### Claim 36 (depends on 34) The method of claim 34, further comprising: receiving an indication of the COT, wherein the listen-before-talk procedure is based at least in part on the indication of the COT.