# US 12,184,582 B2 · Multi-beam CSI feedback > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,582 B2 - Document ID: US12184582B2 - Status: Granted - Kind: B2 - Application number: 18/477,322 - Filed: 2023-09-28 - Published: 2024-01-25 - Granted: 2024-12-31 - Earliest claimed: 2018-07-18 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Tianyang Bai; Makesh Pravin John Wilson; Kiran Venugopal; Jung Ho Ryu; Xiaoxia Zhang; Yan Zhou; Tao Luo - Web page: https://patentgrep.com/patent/US12184582B2 ## CPC - H04L 1/0026: {Transmission of channel quality indication} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04B 7/088: {using beam selection} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0057: {Physical resource allocation for CQI} - 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 In multi-beam communication, the UE may assist in the scheduling of beams utilized during the multi-beam communication by improving the manner in which the quality of the beam is reported to the network. The apparatus may measure a signal received from a base station on at least one beam. The apparatus may detect a triggering event for providing CSI for the at least one beam. The apparatus may transmit an uplink transmission comprising a CSI report in response to detecting the triggering event. The apparatus may receive an uplink request from a UE for providing CSI for at least one beam. The apparatus may transmit an indication scheduling a CSI report in response to the uplink request. The apparatus may receive an uplink transmission from the UE comprising the CSI report for the at least one beam. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: measuring a signal received from a base station via a beam; detecting a triggering event for providing channel state information (CSI) for the beam, wherein the triggering event comprises a beam failure; sending an uplink request based on the triggering event to reserve uplink resources for reporting of the CSI, wherein the uplink request is sent via a scheduling request (SR) for which selection of a physical uplink control channel (PUCCH) resource on which the SR is sent indicates that the beam is associated with an occurrence of the triggering event; receiving an indication scheduling a CSI report in response to the uplink request; and transmitting an uplink transmission comprising the CSI report in response to detecting the triggering event, wherein the CSI report is transmitted according to the indication. ### Claim 2 (depends on 1) The method of claim 1, wherein detecting the triggering event comprises detecting that a measurement of the signal meets a threshold. ### Claim 3 (depends on 1) The method of claim 1, wherein detecting the triggering event comprises detecting that at least one of a reference signal received power (RSRP) or a channel quality indicator (CQI) is below a threshold. ### Claim 4 (depends on 1) The method of claim 1, wherein the indication comprises an uplink grant and the CSI report comprises a medium access control-control element (MAC-CE). ### Claim 5 (depends on 1) The method of claim 1, wherein the CSI report comprises an indication of a recommended beam. ### Claim 6 (depends on 1) The method of claim 1, wherein the triggering event is detected based on the measuring the signal. ### Claim 7 (depends on 1) The method of claim 1, wherein the transmitting comprises transmitting, to the base station, on a plurality of uplink transmission configuration indicator (TCI) beams via a physical uplink control channel (PUCCH), the CSI report, and wherein a first uplink TCI beam of the plurality of uplink TCI beams corresponds to the beam from which the signal is received. ### Claim 8 (depends on 7) The method of claim 7, wherein the CSI report comprises information of each of the plurality of uplink TCI beams, wherein the information indicates the first uplink TCI beam is associated with the beam failure. ### Claim 9 (depends on 7) The method of claim 7, further comprising receiving, from the base station, instructions for the UE to change at least one of the plurality of uplink TCI beams based on the uplink transmission from the UE. ### Claim 10 (depends on 1) The method of claim 1, wherein the beam from which the signal is received from the base station is a first downlink beam, wherein the uplink transmission is transmitted on an uplink beam that corresponds to a second downlink beam different from the first downlink beam, and wherein selection of the uplink beam implicitly indicates to the base station that the first downlink beam is associated with the occurrence of the triggering event. ### Claim 11 (depends on 1) The method of claim 1, further comprising receiving, from the base station, a downlink control signal comprising an indication in a medium access control-control element (MAC-CE) of the downlink control signal, the indication indicating activation of one or more new beams based on the occurrence of the triggering event. ### Claim 12 (depends on 1) The method of claim 1, further comprising receiving, from the base station, an uplink grant indicating allocation of uplink resources for each of a plurality of uplink beams, wherein the uplink resources of each of the plurality of uplink beams includes a particular time-frequency resource that corresponds to a unique triggering event, wherein the uplink transmission is transmitted using the particular time-frequency resource that corresponds to the detected triggering event and implicitly indicates to the base station the occurrence of the triggering event. ### Claim 13 (depends on 1) The method of claim 1, further comprising receiving, from the base station, an uplink grant indicating allocation of uplink resources for each of a plurality of uplink beams, wherein the uplink resources of each of the plurality of uplink beams includes a plurality of carrier frequencies that each respectively correspond to a unique triggering event, wherein the uplink transmission is transmitted using a particular carrier frequency of the plurality of carrier frequencies that corresponds to the detected triggering event and implicitly indicates to the base station the occurrence of the triggering event. ### Claim 14 (depends on 1) The method of claim 1, wherein the uplink request is mapped to the SR, wherein the SR is transmitted using multiple PUCCH resource identifiers. ### Claim 15 (depends on 1) The method of claim 1, wherein the SR is a first SR, wherein the uplink request is mapped to multiple SRs including the first SR, and wherein each of the multiple SRs uses a same PUCCH resource identifier. ### Claim 16 An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: a transceiver; one or more memories, individually or in combination, having instructions; and one or more processors, individually or in combination, configured to execute the instructions and cause the apparatus to: measure a signal received via a beam from a base station, the signal received via the transceiver; detect a triggering event for providing channel state information (CSI) for the beam, wherein the triggering event comprises a beam failure; send, via the transceiver an uplink request based on the triggering event to reserve uplink resources for reporting of the CSI, wherein the uplink request is sent via a scheduling request (SR) for which selection of a physical uplink control channel (PUCCH) resource on which the SR is sent indicates that the beam is associated with an occurrence of the triggering event; receive, via the transceiver, an indication scheduling a CSI report in response to the uplink request; and transmit, via the transceiver, an uplink transmission comprising the CSI report in response to detecting the triggering event, wherein the CSI report is transmitted according to the indication. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the one or more processors, being configured to detect the triggering event, are further configured to detect that a measurement of the signal meets a threshold. ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the one or more processors, being configured to detect the triggering event, are further configured to detect that at least one of a reference signal received power (RSRP) or a channel quality indicator (CQI) is below a threshold. ### Claim 19 (depends on 16) The apparatus of claim 16, wherein the indication comprises an uplink grant and the CSI report comprises a medium access control-control element (MAC-CE). ### Claim 20 (depends on 16) The apparatus of claim 16, wherein the CSI report comprises an indication of a recommended beam. ### Claim 21 (depends on 16) The apparatus of claim 16, wherein the triggering event is detected based on the signal measurement. ### Claim 22 (depends on 16) The apparatus of claim 16, wherein the one or more processors, being configured to transmit the uplink transmission, are further configured to transmit, to the base station, on a plurality of uplink transmission configuration indicator (TCI) beams via a physical uplink control channel (PUCCH), the CSI report, and wherein a first uplink TCI beam of the plurality of uplink TCI beams corresponds to the beam from which the signal is received. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the CSI report comprises information of each of the plurality of uplink TCI beams, wherein the information indicates the first uplink TCI beam is associated with the beam failure. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the one or more processors are further configured to receive, from the base station via the transceiver, instructions for the UE to change at least one of the plurality of uplink TCI beams based on the uplink transmission from the UE. ### Claim 25 (depends on 16) The apparatus of claim 16, wherein the uplink request is mapped to the SR, wherein the SR is transmitted using multiple PUCCH resource identifiers. ### Claim 26 (depends on 16) The apparatus of claim 16, wherein the SR is a first SR, wherein the uplink request is mapped to multiple SRs including the first SR, and wherein each of the multiple SRs uses a same PUCCH resource identifier. ### Claim 27 A method of wireless communication performed by a base station, the method comprising: receiving an uplink request from a user equipment (UE) for providing channel state information (CSI) for a beam, wherein the uplink request is received via a scheduling request (SR) for which selection of a physical uplink control channel (PUCCH) resource on which the SR is received indicates that the beam is associated with an occurrence of a triggering event, wherein the triggering event comprises a beam failure; transmitting an indication scheduling a CSI report in response to the uplink request; and receiving an uplink transmission from the UE comprising the CSI report for the beam wherein the CSI report is received according to the indication. ### Claim 28 (depends on 27) The method of claim 27, wherein the indication comprises an uplink grant and the CSI report comprises a medium access control-control element (MAC-CE). ### Claim 29 An apparatus for wireless communication at a base station, the apparatus comprising: a transceiver; one or more memories, individually or in combination, having instructions; and one or more processors, individually or in combination, configured to execute the instructions and cause the apparatus to: receive, via the transceiver, an uplink request from a user equipment (UE) for providing channel state information (CSI) for a beam, wherein the uplink request is received via a scheduling request (SR) for which selection of a physical uplink control channel (PUCCH) resource on which the SR is received indicates that the beam is associated with an occurrence of a triggering event, wherein the triggering event comprises a beam failure; transmitting, via the transceiver, an indication scheduling a CSI report in response to the uplink request; and receiving, via the transceiver, an uplink transmission from the UE comprising the CSI report for the beam wherein the CSI report is received according to the indication. ### Claim 30 (depends on 29) The apparatus of claim 29, wherein the indication comprises an uplink grant and the CSI report comprises a medium access control-control element (MAC-CE).