# US 11,910,402 B2 · Feedback techniques for group-common PDCCH transmissions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,402 B2 - Document ID: US11910402B2 - Status: Granted - Kind: B2 - Application number: 18/059,053 - Filed: 2022-11-28 - Published: 2023-04-20 - Granted: 2024-02-20 - Earliest claimed: 2020-01-14 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Wooseok Nam; Tao Luo; Peter Pui Lok Ang; Linhai He; Jelena Damnjanovic - Web page: https://patentgrep.com/patent/US11910402B2 ## CPC - H04L 1/1685: {the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1867: Arrangements specially adapted for the transmitter end - 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 A user equipment (UE) may receive a first group downlink control information transmission associated with a UE group, where the first group downlink control information transmission may reference a second group downlink control information transmission (e.g., according to a pre-notification indication). The UE may determine a feedback condition for the second group downlink control information transmission and monitor for the second group downlink control information transmission. Alternatively, the UE may receive a second group downlink control information transmission referencing the first group downlink control information transmission (e.g., according to a post-confirmation indication), and the UE may determine a feedback condition for the first group downlink control information transmission. Based on the feedback condition, the UE may transmit feedback information, for example, indicating that the UE did not correctly receive the indicated group downlink control information transmission. ## Claims ### Claim 1 An apparatus, 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 a first group downlink control information transmission associated with a UE group, the first group downlink control information transmission comprising an indication for a second group downlink control information transmission; monitor for the second group downlink control information transmission based at least in part on the first group downlink control information transmission; and transmit feedback information for the second group downlink control information transmission based at least in part on the indication for the second group downlink control information transmission. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the instructions to transmit the feedback information are further executable by the processor to cause the apparatus to: transmit the feedback information based at least in part on a feedback condition associated with the indication for the second group downlink control information transmission. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the instructions to transmit the feedback information are executable by the processor to cause the apparatus to: determine that the second group downlink control information transmission was not received according to the indication; and transmit negative feedback based at least in part on the feedback condition. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the indication for the second group downlink control information transmission signals a search space set to monitor. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the second group downlink control information transmission is within a subsequent control channel opportunity to the first group downlink control information transmission. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: receive a first switching flag in a first downlink control information; and switch monitoring from a first search space set associated with the first group downlink control information transmission to a second search space set associated with the second group downlink control information transmission based at least in part on the first switching flag. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the instructions are further executable by the processor to cause the apparatus to: start an inactivity timer upon switching monitoring to the second search space set; and upon expiration of the inactivity timer, switch monitoring from the second search space set to the first search space set. ### Claim 8 (depends on 6) The apparatus of claim 6, wherein the instructions are further executable by the processor to cause the apparatus to: receive a second switching flag in a second downlink control information; and restart an inactivity timer while continuing to monitor the second search space set. ### Claim 9 An apparatus, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: monitor for a first group downlink control information transmission; receive a second group downlink control information transmission comprising an indication for the first group downlink control information transmission; and transmit feedback information for the first group downlink control information transmission based at least in part on the indication for the first group downlink control information transmission. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the instructions to transmit the feedback information are further executable by the processor to cause the apparatus to: transmit the feedback information based at least in part on a first feedback condition for the first group downlink control information transmission associated with the indication. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the instructions to transmit the feedback information are executable by the processor to cause the apparatus to: determine that the first group downlink control information transmission was not received according to the indication; and transmit negative feedback based at least in part on the first feedback condition. ### Claim 12 (depends on 10) The apparatus of claim 10, wherein the second group downlink control information transmission references a third group downlink control information transmission, wherein the instructions are further executable by the processor to cause the apparatus to: determine a second feedback condition for the third group downlink control information transmission based at least in part on the second group downlink control information transmission. ### Claim 13 (depends on 10) The apparatus of claim 10, wherein the instructions are further executable by the processor to cause the apparatus to: receive a first switching flag in a first downlink control information; and switch monitoring from a first search space set associated with the first group downlink control information transmission to a second search space set associated with the second group downlink control information transmission based at least in part on the first switching flag. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the instructions are further executable by the processor to cause the apparatus to: start an inactivity timer upon switching monitoring to the second search space set; and upon expiration of the inactivity timer, switch monitoring from the second search space set to the first search space set. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein the instructions are further executable by the processor to cause the apparatus to: receive a second switching flag in a second downlink control information; and restart an inactivity timer while continuing to monitor the second search space set. ### Claim 16 (depends on 9) The apparatus of claim 9, wherein the second group downlink control information transmission indicates a set of resources for transmitting the feedback information. ### Claim 17 (depends on 9) The apparatus of claim 9, wherein the first group downlink control information transmission is in a control channel opportunity preceding the second group downlink control information transmission. ### Claim 18 A method for wireless communication at a user equipment (UE), comprising: receiving a first group downlink control information transmission associated with a UE group, the first group downlink control information transmission comprising an indication for a second group downlink control information transmission; monitoring for the second group downlink control information transmission based at least in part on the first group downlink control information transmission; and transmitting feedback information for the second group downlink control information transmission based at least in part on the indication for the second group downlink control information transmission. ### Claim 19 (depends on 18) The method of claim 18, wherein transmitting the feedback information is based at least in part on a feedback condition associated with the indication for the second group downlink control information transmission. ### Claim 20 (depends on 19) The method of claim 19, wherein transmitting the feedback information further comprises: determining that the second group downlink control information transmission was not received according to the indication; and transmitting negative feedback based at least in part on the feedback condition.