# US 11,445,509 B1 · Downlink beam management using a configurable deflector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,509 B1 - Document ID: US11445509B1 - Status: Granted - Kind: B1 - Application number: 17/245,961 - Filed: 2021-04-30 - Granted: 2022-09-13 - Earliest claimed: 2021-04-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Shay Landis; Ran Berliner; Yehonatan Dallal - Web page: https://patentgrep.com/patent/US11445509B1 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04B 7/026: Co-operative diversity, e.g. using fixed or mobile stations as relays - H04B 7/06966: {using beam correspondence; using channel reciprocity, e.g. downlink beam training based on uplink sounding reference signal [SRS]} - H04B 7/088: {using beam selection} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - 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 - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/15528: {Control of operation parameters of a relay station to exploit the physical medium} - H04W 88/04: adapted for relaying to or from another terminal or user - 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) - H04B: TRANSMISSION ## Abstract Methods, systems, and devices for wireless communications are described. Generally, the described techniques allow a channel engineering device (CED) to identify a suitable configuration for deflecting downlink transmissions from a base station to a user equipment (UE). The base station may transmit control signaling to the CED indicating multiple configurations for deflecting downlink reference signals from the base station. The base station may then transmit the downlink reference signals to the CED, and the CED may deflect the downlink reference signals using the indicated configurations. The UE may receive the downlink reference signals from the base station via the CED, and the UE may perform measurements on the downlink reference signals. The UE may then report the measurements to the base station, and the base station may indicate a configuration for the CED to use to deflect subsequent transmissions from the base station to the UE based on the measurements. ## Claims ### Claim 1 A method for wireless communication at a channel engineering device, comprising: receiving, from a base station, control signaling indicating a plurality of configurations for deflecting a set of downlink reference signal transmissions received from the base station; deflecting each downlink reference signal transmission of the set of downlink reference signal transmissions according to a corresponding configuration of the plurality of configurations; and receiving, from the base station, an indication of a configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to a user equipment (UE) based at least in part on deflecting each downlink reference signal transmission from the base station. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving a report from the UE indicating the configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE; and deflecting the report from the UE to the base station, wherein receiving the indication of the configuration from the base station is based at least in part on deflecting the report from the UE to the base station. ### Claim 3 (depends on 2) The method of claim 2, wherein receiving the report from the UE comprises: receiving the report from the UE on a resource corresponding to the configuration indicated by the base station for the channel engineering device to use to deflect subsequent transmissions to the UE. ### Claim 4 (depends on 2) The method of claim 2, wherein receiving the report from the UE comprises: receiving the report from the UE on a beam corresponding to the configuration indicated by the base station for the channel engineering device to use to deflect subsequent transmissions to the UE. ### Claim 5 (depends on 1) The method of claim 1, further comprising: receiving the set of downlink reference signal transmissions from the base station on a single beam, wherein deflecting each downlink reference signal transmission of the set of downlink reference signal transmissions according to the corresponding configuration of the plurality of configurations comprises beam sweeping the set of downlink reference signal transmissions. ### Claim 6 (depends on 5) The method of claim 5, wherein receiving the set of downlink reference signal transmissions from the base station on the single beam comprises: receiving the set of downlink reference signal transmissions from the base station in consecutive symbols. ### Claim 7 (depends on 1) The method of claim 1, wherein each of the plurality of configurations corresponds to a different angle at which the channel engineering device is to deflect a downlink reference signal transmission. ### Claim 8 (depends on 1) The method of claim 1, wherein the set of downlink reference signal transmissions comprises a set of channel state information reference signal transmissions. ### Claim 9 A method for wireless communication at a base station, comprising: transmitting, to a channel engineering device, control signaling indicating a plurality of configurations for deflecting a set of downlink reference signal transmissions received from the base station; transmitting, to the channel engineering device, the set of downlink reference signal transmissions based at least in part on transmitting the control signaling indicating the plurality of configurations; and receiving, from the UE, a report indicating a configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE based at least in part on transmitting the set of downlink reference signal transmissions. ### Claim 10 (depends on 9) The method of claim 9, further comprising: transmitting, to the channel engineering device, an indication of the configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE based at least in part on receiving the report from the UE. ### Claim 11 (depends on 9) The method of claim 9, wherein receiving the report from the UE indicating the configuration for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE comprises: receiving the report from the UE on a resource corresponding to the configuration for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE. ### Claim 12 (depends on 11) The method of claim 11, further comprising: transmitting, to the UE, an indication of a plurality of resources each allocated for transmitting the report, wherein each resource is allocated to indicate a different configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE. ### Claim 13 (depends on 9) The method of claim 9, wherein transmitting the set of downlink reference signal transmissions comprises: transmitting the set of downlink reference signal transmissions on a single beam for deflection by the channel engineering device to the UE in a beam sweep using the plurality of configurations. ### Claim 14 (depends on 13) The method of claim 13, wherein transmitting the set of downlink reference signal transmissions on the single beam comprises: transmitting the set of downlink reference signal transmissions in consecutive symbols. ### Claim 15 (depends on 9) The method of claim 9, wherein the set of downlink reference signal transmissions comprises a set of channel state information reference signal transmissions. ### Claim 16 A method for wireless communication at a user equipment (UE), comprising: receiving, from a channel engineering device, a set of downlink reference signal transmissions from a base station each deflected by the channel engineering device using a corresponding configuration of a plurality of configurations; performing measurements on each of the set of downlink reference signal transmissions deflected by the channel engineering device based at least in part on the receiving; and transmitting, to the channel engineering device, a report on the measurements performed on each of the set of downlink reference signal transmissions, wherein a resource on which the report is transmitted indicates a configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE. ### Claim 17 (depends on 16) The method of claim 16, further comprising: receiving, from the base station, an indication of a plurality of resources allocated for transmitting the report, wherein each resource is allocated to indicate a different configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE. ### Claim 18 (depends on 16) The method of claim 16, wherein transmitting the report comprises: transmitting the report on a beam corresponding to the configuration for the channel engineering device to use to deflect subsequent transmissions to the UE. ### Claim 19 (depends on 16) The method of claim 16, wherein the measurements comprise reference signal received power measurements, reference signal received quality measurements, signal-to-interference-plus-noise ratio measurements, or a combination thereof. ### Claim 20 (depends on 16) The method of claim 16, wherein the set of downlink reference signal transmissions comprises a set of channel state information reference signal transmissions. ### Claim 21 An apparatus for wireless communication at a channel engineering device, 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, from a base station, control signaling indicating a plurality of configurations for deflecting a set of downlink reference signal transmissions received from the base station; deflect each downlink reference signal transmission of the set of downlink reference signal transmissions according to a corresponding configuration of the plurality of configurations; and receive, from the base station, an indication of a configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to a user equipment (UE) based at least in part on deflecting each downlink reference signal transmission from the base station. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the instructions are further executable by the processor to cause the apparatus to: receive a report from the UE indicating the configuration of the plurality of configurations for the channel engineering device to use to deflect subsequent transmissions from the base station to the UE; and deflect the report from the UE to the base station, wherein receiving the indication of the configuration from the base station is based at least in part on deflecting the report from the UE to the base station. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the instructions to receive the report from the UE are executable by the processor to cause the apparatus to: receive the report from the UE on a resource corresponding to the configuration indicated by the base station for the channel engineering device to use to deflect subsequent transmissions to the UE. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the instructions to receive the report from the UE are executable by the processor to cause the apparatus to: receive the report from the UE on a beam corresponding to the configuration indicated by the base station for the channel engineering device to use to deflect subsequent transmissions to the UE. ### Claim 25 (depends on 21) The apparatus of claim 21, wherein the instructions are further executable by the processor to cause the apparatus to: receive the set of downlink reference signal transmissions from the base station on a single beam, wherein deflecting each downlink reference signal transmission of the set of downlink reference signal transmissions according to the corresponding configuration of the plurality of configurations comprises beam sweeping the set of downlink reference signal transmissions. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein the instructions to receive the set of downlink reference signal transmissions from the base station on the single beam are executable by the processor to cause the apparatus to: receive the set of downlink reference signal transmissions from the base station in consecutive symbols. ### Claim 27 (depends on 21) The apparatus of claim 21, wherein each of the plurality of configurations corresponds to a different angle at which the channel engineering device is to deflect a downlink reference signal transmission. ### Claim 28 (depends on 21) The apparatus of claim 21, wherein the set of downlink reference signal transmissions comprises a set of channel state information reference signal transmissions.