# US 11,445,539 B2 · Handling gaps in uplink transmission in new radio unlicensed > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,539 B2 - Document ID: US11445539B2 - Status: Granted - Kind: B2 - Application number: 16/915,686 - Filed: 2020-06-29 - Published: 2021-01-07 - Granted: 2022-09-13 - Earliest claimed: 2019-07-02 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Kapil Bhattad; Tanumay Datta; Pravjyot Singh Deogun; Xiaoxia Zhang; Jing Sun - Web page: https://patentgrep.com/patent/US11445539B2 ## CPC - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/0008: {by supplementing frame payload, e.g. with padding bits} - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 1/1896: {ARQ related signaling} - H04L 5/0082: {at predetermined intervals} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)} - H04W 72/1268: of uplink data flows - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04L 5/0078: {Timing of allocation} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a set of one or more uplink grants scheduling at least a first uplink transmission and a second uplink transmission during a channel occupancy time of an unlicensed radio frequency spectrum band. The UE may identify a transmission gap between the first uplink transmission and the second uplink transmission of the plurality of uplink transmissions by the UE during the channel occupancy time, the transmission gap exceeding a threshold time. The UE may determine that the transmission gap corresponds to a lost uplink grant. The UE may modify the first uplink transmission or the second uplink transmission based at least in part on the determination that the transmission gap corresponds to the lost uplink grant. ## Claims ### Claim 1 A method for wireless communication at a user equipment (UE), comprising: receiving an uplink grant scheduling a plurality of uplink transmissions during a plurality of transmission time intervals (TTIs) in an unlicensed radio frequency spectrum band; modifying, based at least in part on the uplink grant, one or more uplink transmissions of the plurality of uplink transmissions by reordering the one or more uplink transmissions of the plurality of uplink transmissions; and performing the plurality of uplink transmissions based at least in part on the uplink grant and the modifying. ### Claim 2 (depends on 1) The method of claim 1, wherein the reordering the one or more uplink transmissions comprises scheduling uplink retransmissions before scheduling new uplink transmissions. ### Claim 3 (depends on 1) The method of claim 1, wherein modifying the one or more uplink transmissions comprises: adding padding bits to a subset of the plurality of uplink transmissions for which no data is available. ### Claim 4 (depends on 1) The method of claim 1, wherein modifying the one or more uplink transmissions comprises: adding padding bits to each of the plurality of uplink transmissions that are associated with the an empty uplink buffer status. ### Claim 5 (depends on 1) The method of claim 1, wherein modifying the one or more uplink transmissions comprises: determining, based at least in part on the uplink grant, that the plurality of uplink transmissions are configured for skipping; and skipping one or more uplink transmissions associated with a transmission gap of the plurality of uplink transmissions. ### Claim 6 (depends on 1) The method of claim 1, wherein modifying the one or more uplink transmissions comprises: detecting, based at least in part on the uplink grant and an uplink buffer status, a transmission gap associated with a lost uplink grant in the plurality of TTIs; and performing a full listen-before-talk procedure before an uplink transmission following the transmission gap based at least in part on the determination that the transmission gap corresponds to the lost uplink grant. ### Claim 7 (depends on 1) The method of claim 1, wherein modifying the one or more uplink transmissions comprises: detecting, based at least in part on the uplink grant and an uplink buffer status, a transmission gap in the plurality of TTIs; determining that a duration of the transmission gap is within a threshold range; and performing, based at least in part on the duration being within the threshold range, a short listen-before-talk procedure before an uplink transmission following the transmission gap. ### Claim 8 (depends on 1) The method of claim 1, wherein modifying the one or more uplink transmissions comprises: detecting, based at least in part on the uplink grant and an uplink buffer status, a transmission gap in the plurality of TTIs; and performing a short listen-before-talk procedure before an uplink transmission following the transmission gap based at least in part on the uplink grant configuring the short listen-before-talk procedure or on the uplink transmission being performed during a channel occupancy time associated with the plurality of TTIs. ### Claim 9 An apparatus for wireless communication at a user equipment (UE), comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive an uplink grant scheduling a plurality of uplink transmissions during a plurality of transmission time intervals (TTIs) in an unlicensed radio frequency spectrum band; modify, based at least in part on the uplink grant, one or more uplink transmissions of the plurality of uplink transmissions by reordering the plurality of uplink transmissions; and perform the plurality of uplink transmissions based at least in part on the uplink grant and the modifying. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the instructions to reorder the one or more uplink transmissions are executable by the processor to cause the apparatus to: schedule uplink retransmissions before scheduling new uplink transmissions. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein the instructions to modify the one or more uplink transmissions are executable by the processor to cause the apparatus to: add padding bits to a subset of the plurality of uplink transmissions for which no data is available. ### Claim 12 (depends on 9) The apparatus of claim 9, wherein the instructions to modify the one or more uplink transmissions are executable by the processor to cause the apparatus to: add padding bits to each of the plurality of uplink transmissions that are associated with the an empty uplink buffer status. ### Claim 13 (depends on 9) The apparatus of claim 9, wherein the instructions to modify the one or more uplink transmissions are executable by the processor to cause the apparatus to: determine, based at least in part on the uplink grant, that the plurality of uplink transmissions are configured for skipping; and skip one or more uplink transmissions that are associated with a transmission gap of the plurality of uplink transmissions. ### Claim 14 (depends on 9) The apparatus of claim 9, wherein the instructions to modify the one or more uplink transmissions are executable by the processor to cause the apparatus to: detect, based at least in part on the uplink grant and an uplink buffer status, a transmission gap associated with a lost uplink grant in the plurality of TTIs; and perform a full listen-before-talk procedure before an uplink transmission following the transmission gap based at least in part on the determination that the transmission gap corresponds to the lost uplink grant. ### Claim 15 (depends on 9) The apparatus of claim 9, wherein the instructions to modify the one or more uplink transmissions are executable by the processor to cause the apparatus to: detect, based at least in part on the uplink grant and an uplink buffer status, a transmission gap in the plurality of TTIs; determine that a duration of the transmission gap is within a threshold range; and perform, based at least in part on the duration being within the threshold range, a short listen-before-talk procedure before an uplink transmission following the transmission gap. ### Claim 16 (depends on 9) The apparatus of claim 9, wherein the instructions to modify the one or more uplink transmissions are executable by the processor to cause the apparatus to: detect, based at least in part on the uplink grant and an uplink buffer status, a transmission gap in the plurality of TTIs; and perform a short listen-before-talk procedure before an uplink transmission following the transmission gap based at least in part on the uplink grant configuring the short listen-before-talk procedure or on the uplink transmission being performed during a channel occupancy time associated with the plurality of TTIs.