# US 11,909,690 B2 · Feedback for beam changes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,690 B2 - Document ID: US11909690B2 - Status: Granted - Kind: B2 - Application number: 17/224,893 - Filed: 2021-04-07 - Published: 2021-11-25 - Granted: 2024-02-20 - Earliest claimed: 2020-05-22 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Mahmoud Taherzadeh Boroujeni; Tao Luo; Sony Akkarakaran - Web page: https://patentgrep.com/patent/US11909690B2 ## 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)} - H04B 7/0623: {Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04L 1/1671: {the supervisory signal being transmitted together with control information} - H04L 1/1896: {ARQ related signaling} - H04L 5/0023: {Time-frequency-space} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A UE may be configured to receive, from a base station, a downlink transmission on a downlink data channel including data and an indication of a beam switch; transmit first ACK feedback to the base station in response to receiving the data; and transmit second ACK feedback to the base station in response to receiving the indication of the beam switch, the second ACK feedback being separate from the first ACK feedback. A base station may be configured to transmit, to a UE, a downlink transmission on a downlink data channel including data and an indication of a beam switch; receive first ACK feedback from the UE in response to transmitting the data; and receive second ACK feedback from the UE in response to transmitting the indication of the beam switch, the second ACK feedback being separate from the first ACK feedback. ## Claims ### Claim 1 A method of wireless communication at a user equipment (UE), comprising: receiving, from a base station, a downlink transmission on a downlink data channel including data and an indication of a beam switch; transmitting first acknowledgement (ACK) feedback to the base station in response to receiving the data; and transmitting, on a same beam set as the first ACK feedback, second ACK feedback to the base station in response to receiving the indication of the beam switch, the second ACK feedback being separate from the first ACK feedback. ### Claim 2 (depends on 1) The method of claim 1, wherein the downlink transmission includes a medium access control (MAC) control element (CE) that includes the indication of the beam switch. ### Claim 3 (depends on 1) The method of claim 1, wherein the transmitting second ACK feedback to the base station in response to receiving the indication of the beam switch comprises: transmitting second ACK feedback to the base station in response to receiving the indication of the beam switch after a first time period following the downlink transmission on the downlink data channel. ### Claim 4 (depends on 3) The method of claim 3, wherein the first time period is one of received from the base station or preconfigured at the UE. ### Claim 5 (depends on 1) The method of claim 1, wherein the second ACK feedback is at least one of: transmitted on a second set of resources different from a first set of resources on which the first ACK feedback is transmitted, transmitted in a second format different from a first format in which the first ACK feedback is transmitted, transmitted as a second type different from a first type as the first ACK feedback is transmitted, or transmitted using a second transmission method different from a first transmission method used for transmitting the first ACK feedback. ### Claim 6 (depends on 1) The method of claim 1, wherein the second ACK feedback is transmitted based on a set of parameters that includes at least one of: a configuration associated with repeated transmissions of the second ACK feedback, a set of resources on an uplink control channel that carries the second ACK feedback, or a format of the uplink control channel that carries the second ACK feedback. ### Claim 7 (depends on 6) The method of claim 6, wherein the set of parameters is preconfigured at the UE. ### Claim 8 (depends on 6) The method of claim 6, further comprising: receiving, from the base station, information indicating the set of parameters. ### Claim 9 (depends on 8) The method of claim 8, wherein the information indicating the set of parameters is received via one of radio resource control (RRC) signaling or the indication of the beam switch. ### Claim 10 (depends on 1) The method of claim 1, further comprising: receiving, from the base station, information activating the indication of the beam switch on the downlink data channel. ### Claim 11 (depends on 10) The method of claim 10, wherein the information activating the indication of the beam switch on the downlink data channel is received via downlink control information (DCI) that is one of specific to the UE or common to a group of UEs. ### Claim 12 A method of wireless communication at a base station, comprising: transmitting, to a user equipment (UE), a downlink transmission on a downlink data channel including data and an indication of a beam switch; receiving first acknowledgement (ACK) feedback from the UE in response to transmitting the data; and receiving, on a same beam set as the first ACK feedback, second ACK feedback from the UE in response to transmitting the indication of the beam switch, the second ACK feedback being separate from the first ACK feedback. ### Claim 13 (depends on 12) The method of claim 12, wherein the downlink transmission includes a medium access control (MAC) control element (CE) that includes the indication of the beam switch. ### Claim 14 (depends on 12) The method of claim 12, wherein the receiving the second ACK feedback from the UE in response to transmitting the indication of the beam switch comprises: receiving second ACK feedback from the UE in response to transmitting the indication of the beam switch after a first time period following the downlink transmission on the downlink data channel. ### Claim 15 (depends on 14) The method of claim 14, wherein the first time period is one of transmitted to the UE or preconfigured at the UE. ### Claim 16 (depends on 12) The method of claim 12, wherein the second ACK feedback is at least one of: received on a second set of resources different from a first set of resources on which the first ACK feedback is received, received in a second format different from a first format in which the first ACK feedback is received, received as a second type different from a first type as the first ACK feedback is received, or received according to a second transmission method different from a first transmission method used for transmitting the first ACK feedback. ### Claim 17 (depends on 12) The method of claim 12, wherein the second ACK feedback is received based on a set of parameters that includes at least one of: a configuration associated with repeated transmissions of the second ACK feedback, a set of resources on an uplink control channel that carries the second ACK feedback, or a format of the uplink control channel that carries the second ACK feedback. ### Claim 18 (depends on 17) The method of claim 17, further comprising: transmitting, to the UE, information indicating the set of parameters. ### Claim 19 (depends on 18) The method of claim 18, wherein the information indicating the set of parameters is transmitted via one of radio resource control (RRC) signaling or the indication of the beam switch. ### Claim 20 (depends on 12) The method of claim 12, further comprising: transmitting, to the UE, information activating the indication of the beam switch on the downlink data channel. ### Claim 21 (depends on 20) The method of claim 20, wherein the information activating the indication of the beam switch on the downlink data channel is transmitted via downlink control information (DCI) that is one of specific to the UE or common to a group of UEs. ### Claim 22 An apparatus for wireless communication by a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to: receive, from a base station, a downlink transmission on a downlink data channel including data and an indication of a beam switch; transmit first acknowledgement (ACK) feedback to the base station in response to reception of the data; and transmit, on a same beam set as the first ACK feedback, second ACK feedback to the base station in response to reception of the indication of the beam switch, the second ACK feedback being separate from the first ACK feedback. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the downlink transmission includes a medium access control (MAC) control element (CE) that includes the indication of the beam switch. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein to transmit the second ACK feedback to the base station in response to reception of the indication of the beam switch, the at least one processor is configured to: transmit second ACK feedback to the base station in response to reception of the indication of the beam switch after a first time period following the downlink transmission on the downlink data channel. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the first time period is one of received from the base station or preconfigured at the UE. ### Claim 26 (depends on 22) The apparatus of claim 22, wherein the second ACK feedback is at least one of: transmitted on a second set of resources different from a first set of resources on which the first ACK feedback is transmitted, transmitted in a second format different from a first format in which the first ACK feedback is transmitted, transmitted as a second type different from a first type as the first ACK feedback is transmitted, or transmitted using a second transmission apparatus different from a first transmission apparatus used for transmitting the first ACK feedback. ### Claim 27 (depends on 22) The apparatus of claim 22, wherein the second ACK feedback is transmitted based on a set of parameters that includes at least one of: a configuration associated with repeated transmissions of the second ACK feedback, a set of resources on an uplink control channel that carries the second ACK feedback, or a format of the uplink control channel that carries the second ACK feedback. ### Claim 28 An apparatus for wireless communication by a base station, comprising: a memory; and at least one processor coupled to the memory and configured to: transmit, to a user equipment (UE), a downlink transmission on a downlink data channel including data and an indication of a beam switch; receive first acknowledgement (ACK) feedback from the UE in response to transmission of the data; and receive, on a same beam set as the first ACK feedback, second ACK feedback from the UE in response to transmission of the indication of the beam switch, the second ACK feedback being separate from the first ACK feedback. ### Claim 29 (depends on 28) The apparatus of claim 28, wherein the downlink transmission includes a medium access control (MAC) control element (CE) that includes the indication of the beam switch. ### Claim 30 (depends on 28) The apparatus of claim 28, wherein to receive the second ACK feedback from the UE in response to transmitting the indication of the beam switch, the at least one processor is configured to: receive second ACK feedback from the UE in response to transmitting the indication of the beam switch after a first time period following the downlink transmission on the downlink data channel.