# US 2025/0097977 A1 · Method for transmitting/receiving uplink signal and apparatus for same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0097977 A1 - Document ID: US20250097977A1 - Status: Published application - Kind: A1 - Application number: 18/726,969 - Filed: 2023-01-04 - Published: 2025-03-20 - Earliest claimed: 2022-01-07 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Sechang MYUNG; Suckchel YANG; Seonwook KIM - Web page: https://patentgrep.com/patent/US20250097977A1 ## CPC - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04W 16/28: using beam steering - H04W 72/044: based on the type of the allocated resource - H04W 74/085: {collision avoidance} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract Disclosed is a method by which a terminal performs UL transmission in a wireless communication system. In particular, the method comprises transmitting an LBT failure indication to an MAC entity on the basis of first LBT based on a first sensing beam from among a plurality of sensing beams being failed, selecting a second sensing beam different from the first sensing beam, from among the plurality of sensing beams, on the basis of the number LBT failure indications transmitted by continuous failure of the first LBT reaching a maximum counter value associated with the first sensing beam, and performing the UL transmission through a transmission beam covered by the second sensing beam, on the basis of second LBT based on the second sensing beam being successful, wherein maximum counter values associated with the plurality of sensing beams may be individually associated with the plurality of sensing beams, respectively. ## Claims ### Claim 1 A method of performing uplink (UL) transmission by a user equipment (UE) in a wireless communication system, the method comprising: performing first listen before talk (LBT) based on a first sensing beam from among a plurality sensing beams; transmitting an LBT failure indication to a medium access control (MAC) entity based on failure of the first LBT; counting a number of the transmitted LBT failure indications due to consistent failure of the first LBT by the MAC entity; based on that the number of the LBT failure indications reaches a maximum counter value related to the first sensing beam, selecting a second sensing beam different from the first sensing beam from among the plurality of sensing beams; performing second LBT based on the second sensing beam; and based on success of the second LBT, performing the UL transmission through a transmission beam covered by the second sensing beam, wherein maximum counter values related to the plurality of sensing beams are separately related to the plurality of sensing beams, respectively. ### Claim 2 (depends on 1) The method of claim 1, wherein the first sensing beam is related to a specific synchronization signal block (SSB) index. ### Claim 3 (depends on 2) The method of claim 2, wherein, based on the failure of the first LBT, the number of LBT failure indications related to the third sensing beam related to the specific SSB index is also counted. ### Claim 4 (depends on 1) The method of claim 1, wherein the first sensing beam covers a transmission beam known by spatial relation information or a unified transmission configuration indicator (TCI) framework. ### Claim 5 (depends on 4) The method of claim 4, wherein, based on the failure of the first LBT, both a first LBT failure counter value related to the transmission beam and the second LBT failure counter value related to the first sensing beam are counted. ### Claim 6 (depends on 5) The method of claim 5, wherein the second sensing beam is selected based on at least one of the first LBT failure counter value reaching a first maximum value and the second LBT failure counter value reaching a second maximum value. ### Claim 7 A user equipment (UE) for performing uplink (UL) transmission in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; and at least one computer memory operatively connected to the at least one processor and configured to store instructions that when executed causes the at least one processor to perform operations including: performing first listen before talk (LBT) based on a first sensing beam from among a plurality sensing beams; transmitting an LBT failure indication to a medium access control (MAC) entity based on failure of the first LBT; counting a number of the transmitted LBT failure indications due to consistent failure of the first LBT by the MAC entity; based on that the number of the LBT failure indications reaches a maximum counter value related to the first sensing beam, selecting a second sensing beam different from the first sensing beam from among the plurality of sensing beams; performing second LBT based on the second sensing beam; and based on success of the second LBT, performing the UL transmission through a transmission beam covered by the second sensing beam, through the at least one transceiver, wherein maximum counter values related to the plurality of sensing beams are separately related to the plurality of sensing beams, respectively. ### Claim 8 (depends on 7) The UE of claim 7, wherein the first sensing beam is related to a specific synchronization signal block (SSB) index. ### Claim 9 (depends on 8) The UE of claim 8, wherein, based on the failure of the first LBT, the number of LBT failure indications related to the third sensing beam related to the specific SSB index is also counted. ### Claim 10 (depends on 7) The UE of claim 7, wherein the first sensing beam covers a transmission beam known by spatial relation information or a unified transmission configuration indicator (TCI) framework. ### Claim 11 (depends on 10) The UE of claim 10, wherein, based on the failure of the first LBT, both a first LBT failure counter value related to the transmission beam and the second LBT failure counter value related to the first sensing beam are counted. ### Claim 12 (depends on 11) The UE of claim 11, wherein the second sensing beam is selected based on at least one of the first LBT failure counter value reaching a first maximum value and the second LBT failure counter value reaching a second maximum value. ### Claim 13 (canceled) ### Claim 14 A method for performing uplink (UL) reception by a base station (BS) in a wireless communication system, the method comprising: transmitting information related to a transmission beam for the UL reception; and performing the UL reception based on the information related to the transmission beam, wherein the UL reception is performed based on success of a first LBT based on a first sensing beam covering the transmission beam, the first sensing beam is reselected from among a plurality of sensing beams based on that a number of consistent failures of a second LBT based on a sensing beam different from the first sensing beam reaches a maximum counter value related to the second sensing beam, and maximum counter values related to the plurality of sensing beams are separately related to the plurality of sensing beams, respectively. ### Claim at position 15 15-16. (canceled)