# US 11,451,360 B2 · Priority-based feedback triggering > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,360 B2 - Document ID: US11451360B2 - Status: Granted - Kind: B2 - Application number: 16/737,738 - Filed: 2020-01-08 - Published: 2020-07-16 - Granted: 2022-09-20 - Earliest claimed: 2019-01-10 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Tien Viet Nguyen; Sudhir Kumar Baghel; Kapil Gulati; Arjun Bharadwaj; Shailesh Patil - Web page: https://patentgrep.com/patent/US11451360B2 ## CPC - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04L 5/16: Half-duplex systems; Simplex/duplex switching; Transmission of break signals {non-automatically inverting the direction of transmission} - H04L 2001/0093: {Point-to-multipoint} - 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 communication are described. A user equipment (UE) may utilize priority levels associated with packets or transmissions to determine whether to transmit feedback for a received transmission. The UE may compare priority levels between a transmission subject to a feedback condition and a transmission scheduled to be received when the feedback is scheduled to be transmitted to determine whether to send the feedback. The UE may communicate with the transmitting device according to the comparison and the determining. The UE may determine signal conditions causing a NAK and determine to send the NAK based on the signal conditions. ## Claims ### Claim 1 A method for wireless communication at a user equipment (UE), comprising: identifying a first priority level of a first transmission by a transmitting device, wherein the first transmission is subject to a feedback condition; identifying a second priority level associated with a second transmission scheduled to be received at a time that the UE is scheduled to transmit feedback for the first transmission in accordance with the feedback condition; comparing the first priority level with the second priority level; determining whether to transmit the feedback for the first transmission based at least in part on the comparing and on the UE operating in half duplex; and communicating with the transmitting device in accordance with the determining. ### Claim 2 (depends on 1) The method of claim 1, wherein identifying the second priority level comprises: identifying the second priority level based at least in part on a priority level associated with a transmission by the UE, wherein the second transmission is feedback corresponding to the transmission by the UE. ### Claim 3 (depends on 1) The method of claim 1, wherein determining whether to transmit the feedback for the first transmission comprises: determining that the first priority level is greater than the second priority level based at least in part on the comparing; and determining to transmit the feedback for the first transmission to the transmitting device based at least in part on the first priority level being greater than the second priority level. ### Claim 4 (depends on 1) The method of claim 1, wherein determining whether to transmit the feedback for the first transmission comprises: determining that the first priority level is less than the second priority level based at least in part on the comparing; and determining to avoid transmission of the feedback for the first transmission based at least in part on the first priority level being less than the second priority level. ### Claim 5 (depends on 1) The method of claim 1, wherein determining whether to transmit the feedback for the first transmission comprises: determining that the first priority level is less than the second priority level based at least in part on the comparing; estimating a decoding performance associated with receipt of the second transmission that would result from transmission of the feedback for the first transmission during the time that the second transmission is scheduled to be received; and determining to transmit the feedback for the first transmission during the time based at least in part on the decoding performance. ### Claim 6 (depends on 5) The method of claim 5, wherein the estimating is dependent on a capability of the UE. ### Claim 7 (depends on 1) The method of claim 1, wherein determining whether to transmit the feedback for the first transmission comprises: determining that the first priority level corresponds to the second priority level based at least in part on the comparing. ### Claim 8 (depends on 7) The method of claim 7, further comprising: determining to transmit the feedback to the transmitting device based at least in part on a feedback transmission probability. ### Claim 9 (depends on 8) The method of claim 8, wherein the feedback transmission probability is based at least in part on a distance between the UE and the transmitting device, a determined congestion level, or a combination thereof. ### Claim 10 (depends on 8) The method of claim 8, further comprising: receiving, from the transmitting device, sidelink control signaling indicating the feedback transmission probability. ### Claim 11 (depends on 7) The method of claim 7, further comprising: identifying that the first transmission is subject to a negative acknowledgement (NAK) in accordance with the feedback condition; and identifying a signal condition from which the NAK arises, wherein the signal condition indicates at least whether the NAK is caused by signal interference. ### Claim 12 (depends on 11) The method of claim 11, further comprising: identifying that the NAK is caused by the signal interference; and determining, responsive to the signal interference causing the NAK, to transmit the NAK to the transmitting device based at least in part on a NAK transmission probability. ### Claim 13 (depends on 12) The method of claim 12, wherein the NAK transmission probability is based at least in part on a distance between the UE and the transmitting device, a determined congestion level, or a combination thereof. ### Claim 14 (depends on 11) The method of claim 11, further comprising: identifying a source other than signal interference from which the NAK arises; and determining to transmit the NAK based at least in part on the identifying the source other than signal interference. ### Claim 15 (depends on 14) The method of claim 14, wherein determining to transmit the NAK comprises: comparing a congestion level to a threshold, wherein the determining to transmit the NAK is based at least in part on the comparing. ### Claim 16 (depends on 15) The method of claim 15, further comprising: receiving the threshold from the transmitting device. ### Claim 17 (depends on 15) The method of claim 15, further comprising: determining the threshold at the UE. ### Claim 18 (depends on 15) The method of claim 15, further comprising: comparing a distance between the UE and the transmitting device to the threshold, wherein the determining to transmit the NAK is based at least in part on the comparing and wherein the threshold is a distance threshold. ### Claim 19 (depends on 11) The method of claim 11, wherein identifying the signal condition comprises: determining a measurement for one or both of reference signal received power (RSRP) and reference signal received quality (RSRQ); and identifying whether the measurement is higher than a threshold to identify the signal condition. ### Claim 20 (depends on 11) The method of claim 11, wherein identifying the signal condition comprises: receiving a first control signal from a first transmitting device and a second control signal from a second transmitting device, wherein the first transmitting device and the second transmitting device are determined to satisfy a proximity condition based at least in part on the first control signal and the second control signal; decoding the first control signal and the second control signal to identify that the first control signal and the second control signal are subject to interference; and identifying that the NAK is caused by the signal interference based at least in part on the decoding. ### Claim 21 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: identify a first priority level of a first transmission by a transmitting device, wherein the first transmission is subject to a feedback condition; identify a second priority level associated with a second transmission scheduled to be received at a time that the UE is scheduled to transmit feedback for the first transmission in accordance with the feedback condition; compare the first priority level with the second priority level; determine whether to transmit the feedback for the first transmission based at least in part on the comparing and on the UE operating in half duplex; and communicate with the transmitting device in accordance with the determining. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the instructions to identify the second priority level are executable by the processor to cause the apparatus to: identify the second priority level based at least in part on a priority level associated with a transmission by the UE, wherein the second transmission is feedback corresponding to the transmission by the UE. ### Claim 23 (depends on 21) The apparatus of claim 21, wherein the instructions to determine whether to transmit the feedback for the first transmission are executable by the processor to cause the apparatus to: determine that the first priority level is greater than the second priority level based at least in part on the comparing; and determine to transmit the feedback for the first transmission to the transmitting device based at least in part on the first priority level being greater than the second priority level. ### Claim 24 An apparatus for wireless communication at a user equipment (UE), comprising: means for identifying a first priority level of a first transmission by a transmitting device, wherein the first transmission is subject to a feedback condition; means for identifying a second priority level associated with a second transmission scheduled to be received at a time that the UE is scheduled to transmit feedback for the first transmission in accordance with the feedback condition; means for comparing the first priority level with the second priority level; means for determining whether to transmit the feedback for the first transmission based at least in part on the comparing and on the UE operating in half duplex; and means for communicating with the transmitting device in accordance with the determining. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the means for identifying the second priority level comprise: means for identifying the second priority level based at least in part on a priority level associated with a transmission by the UE, wherein the second transmission is feedback corresponding to the transmission by the UE. ### Claim 26 (depends on 24) The apparatus of claim 24, wherein the means for determining whether to transmit the feedback for the first transmission comprise: means for determining that the first priority level is greater than the second priority level based at least in part on the comparing; and means for determining to transmit the feedback for the first transmission to the transmitting device based at least in part on the first priority level being greater than the second priority level. ### Claim 27 (depends on 24) The apparatus of claim 24, wherein the means for determining whether to transmit the feedback for the first transmission comprise: means for determining that the first priority level is less than the second priority level based at least in part on the comparing; and means for determining to avoid transmission of the feedback for the first transmission based at least in part on the first priority level being less than the second priority level. ### Claim 28 A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to: identify a first priority level of a first transmission by a transmitting device, wherein the first transmission is subject to a feedback condition; identify a second priority level associated with a second transmission scheduled to be received at a time that the UE is scheduled to transmit feedback for the first transmission in accordance with the feedback condition; compare the first priority level with the second priority level; determine whether to transmit the feedback for the first transmission based at least in part on the comparing and on the UE operating in half duplex; and communicate with the transmitting device in accordance with the determining. ### Claim 29 (depends on 28) The non-transitory computer-readable medium of claim 28, wherein the instructions to identify the second priority level are executable by the processor to: identify the second priority level based at least in part on a priority level associated with a transmission by the UE, wherein the second transmission is feedback corresponding to the transmission by the UE. ### Claim 30 (depends on 28) The non-transitory computer-readable medium of claim 28, wherein the instructions to determine whether to transmit the feedback for the first transmission are executable by the processor to: determine that the first priority level is greater than the second priority level based at least in part on the comparing; and determine to transmit the feedback for the first transmission to the transmitting device based at least in part on the first priority level being greater than the second priority level.