# US 2022/0286339 A1 · Peak-to-average power ratio management for relayed communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0286339 A1 - Document ID: US20220286339A1 - Status: Published application - Kind: A1 - Application number: 17/567,687 - Filed: 2022-01-03 - Published: 2022-09-08 - Earliest claimed: 2021-03-05 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jing Lei; Wei Yang; Tingfang Ji - Web page: https://patentgrep.com/patent/US20220286339A1 ## CPC - H04L 27/2618: {Reduction thereof using auxiliary subcarriers} - H04B 1/005: {adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges} - H04B 17/354: Adjacent channel leakage power - H04L 27/262: {Reduction thereof by selection of pilot symbols} - H04W 52/16: Deriving transmission power values from another channel - H04W 52/46: in multi-hop networks, e.g. wireless relay networks - H04W 52/52: using AGC [Automatic Gain Control] circuits or amplifiers - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/155: Ground-based stations (H04B7/204 takes precedence) - 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 Methods, systems, and devices for wireless communications are described. PAPR may be relevant to managing transmitter power, receiver sensitivity, or both, and transmissions of a particular device may consider various PAPR reduction strategies to manage transmission power at the device. However, relay devices may be configured to forward communications from multiple transmitting devices, and PAPR may not be considered for aggregate signaling via such a relay device. In some examples of the described PAPR management techniques, assisting transmitters may be configured to transmit PAPR reduction signaling that may be received by a relay device, such that an aggregated signal that is received and forwarded by the relay device may have lower PAPR. Additionally, or alternatively, in some examples of the described PAPR management techniques, a relay device itself may inject PAPR reduction signaling into a received signal to reduce PAPR of a transmission by the relay device. ## Claims ### Claim 1 An apparatus for wireless communication, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: evaluate peak-to-average power ratio (PAPR) for communications from a set of user equipments (UEs) for a time interval, wherein the set of UEs communicate with the apparatus via a relay device; and transmit, to a transmitting device, an indication of a configuration for PAPR reduction signals that is based at least in part on evaluating the PAPR. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the set of UEs comprises a plurality of UEs, and wherein: the instructions to evaluate PAPR for the communications from the set of UEs are executable by the processor to cause the apparatus to evaluate PAPR for a composite signal that includes respective communications from each UE of the plurality of UEs for the time interval; and the instructions to transmit the indication of the configuration for PAPR reduction signals are executable by the processor to cause the apparatus to transmit an indication of a cell-specific or group-specific PAPR reduction scheme based at least in part on evaluating PAPR for the composite signal. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: transmit, to the transmitting device, a request for capability information associated with support of PAPR reduction, wherein the configuration for PAPR reduction signals is based at least in part on a response to the request for capability information associated with support of PAPR reduction. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the instructions to transmit the indication of the configuration for PAPR reduction signals are executable by the processor to cause the apparatus to: transmit, to one or more UEs of the set of UEs, an indication of PAPR reduction signals for transmission during the time interval by the one or more UEs of the set of UEs. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the instructions are further executable by the processor to cause the apparatus to: transmit, to each UE of the one or more UEs, a first uplink grant associated with a portion of the communications from the each UE for the time interval and a second uplink grant comprising the indication of PAPR reduction signals for transmission during the time interval. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the instructions to transmit the indication of the configuration for PAPR reduction signals are executable by the processor to cause the apparatus to: transmit, to one or more UEs not included in the set of UEs, an indication of PAPR reduction signals for transmission during the time interval by the one or more UEs not included in the set of UEs. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the instructions to transmit the indication of the configuration for PAPR reduction signals are executable by the processor to cause the apparatus to: transmit, to a plurality of UEs, an indication of PAPR reduction signals for transmission during the time interval by each of the plurality of UEs using a same resource in the time domain and frequency domain. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the instructions to transmit the indication of the configuration for PAPR reduction signals are executable by the processor to cause the apparatus to: transmit, to the relay device, an indication of PAPR reduction signals for transmission during the time interval by the relay device. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the configuration for PAPR reduction signals is based at least in part on a bandwidth of the communications from the set of UEs, or a transmission bandwidth of the relay device. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the configuration for PAPR reduction signals is based at least in part on a UE capability associated with PAPR reduction or a PAPR target for a transmission by the relay device, or a PAPR reduction capability or a PAPR target for a reception by the relay device, or a combination thereof. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the configuration for PAPR reduction signals is based at least in part on a numerology, a waveform, an adjacent channel leakage ratio, a guard band configuration, a UE capability indication, a UE power class, a bandwidth of an active bandwidth part, a number of transmit antennas, a link budget or coverage requirement, or a combination thereof. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: receive, from the relay device, signals comprising the communications from the UEs and one or more PAPR reduction signals in accordance with the indicated configuration; demultiplex communications signaling associated with the communications from the received signals; and process the communications signaling independent of the one or more PAPR reduction signals to obtain data streams, control information, reference signals, or a combination thereof from the set of UEs. ### Claim 13 An apparatus for wireless communication, 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 network node, an indication of a peak-to-average power ratio (PAPR) reduction configuration; receive, from a set of one or more user equipments (UEs), communications to be forwarded by the apparatus; generate a PAPR reduction signal based at least in part on the PAPR reduction configuration; and transmit signaling including the communications and the generated PAPR reduction signal. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein: the instructions to receive the indication of the PAPR reduction configuration are executable by the processor to cause the apparatus to receive an indication of a frequency resource allocated for PAPR reduction signals; and the instructions to generate the PAPR reduction signal are executable by the processor to cause the apparatus to generate the PAPR reduction signal for transmission using the frequency resource. ### 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, from the network node, a request for capability information associated with support of PAPR reduction; and transmit, to the network node, a response indicating a capability to support the PAPR reduction, wherein receiving the indication of the PAPR reduction configuration is based at least in part on the response. ### Claim 16 (depends on 13) The apparatus of claim 13, wherein the instructions are further executable by the processor to cause the apparatus to: evaluate PAPR of the received communications to be forwarded by the apparatus; and generate the PAPR reduction signal based at least in part on evaluating PAPR of the received communications. ### Claim 17 (depends on 13) The apparatus of claim 13, wherein the instructions to receive the indication of the PAPR reduction configuration are executable by the processor to cause the apparatus to: receive a command to multiplex PAPR reduction signals with the communications to be forwarded by the apparatus. ### Claim 18 An apparatus for wireless communication, 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 command from a network node to perform a peak-to-average power ratio (PAPR) reduction transmission to a relay device; generate a PAPR reduction signal for a time interval based at least in part on the received command; and transmit the generated PAPR reduction signal to the relay device during the time interval. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the instructions are further executable by the processor to cause the apparatus to: receive, from the network node, a request for capability information associated with support of PAPR reduction; and transmit, to the network node, a response indicating a capability of the apparatus to support the PAPR reduction, wherein receiving the command to perform the PAPR reduction transmission is based at least in part on transmitting the response. ### Claim 20 (depends on 18) The apparatus of claim 18, wherein the instructions are further executable by the processor to cause the apparatus to: receive a first uplink grant associated with uplink communications from the apparatus to the relay device and a second uplink grant comprising the command to perform a PAPR reduction transmission to the relay device; and transmit, to the relay device, the generated PAPR reduction signal concurrently with the uplink communications. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein the first uplink grant indicates a first transmission power for communications from the apparatus to the relay device and the second uplink grant indicates a second transmission power for the generated PAPR reduction signal that is different than the first transmission power. ### Claim 22 (depends on 18) The apparatus of claim 18, wherein the command comprises an indication of a frequency for PAPR reduction signals, an indication of a power for PAPR reduction signals, an indication of a set of one or more symbols for PAPR reduction signals, an indication of a set of one or more resource elements for PAPR reduction signals, an indication of a set of one or more physical resource blocks for PAPR reduction signals, an indication of a set of one or more tones for PAPR reduction signals, or a combination thereof. ### Claim 23 A method for wireless communication, comprising: evaluating, at a network node, peak-to-average power ratio (PAPR) for communications from a set of user equipments (UEs) for a time interval, wherein the set of UEs communicate with the network node via a relay device; and transmitting, by the network node and to a transmitting device, an indication of a configuration for PAPR reduction signals that is based at least in part on evaluating the PAPR. ### Claim 24 (depends on 23) The method of claim 23, wherein the set of UEs comprises a plurality of UEs, and wherein: evaluating PAPR for the communications from the set of UEs comprises evaluating PAPR for a composite signal that includes respective communications from each UE of the plurality of UEs for the time interval; and transmitting the indication of the configuration for PAPR reduction signals comprises transmitting an indication of a cell-specific or group-specific PAPR reduction scheme based at least in part on evaluating PAPR for the composite signal. ### Claim 25 (depends on 23) The method of claim 23, further comprising: transmitting, to each UE of the one or more UEs, a first uplink grant associated with a portion of the communications from the each UE for the time interval and a second uplink grant comprising the indication of PAPR reduction signals for transmission during the time interval. ### Claim 26 (depends on 23) The method of claim 23, wherein transmitting the indication of the configuration for PAPR reduction signals comprises: transmitting, to a plurality of UEs, an indication of PAPR reduction signals for transmission during a first time interval by each of the plurality of UEs; and transmitting, to the relay device, an indication of PAPR reduction signals for transmission during a second time interval by the relay device. ### Claim 27 (depends on 23) The method of claim 23, wherein the configuration for PAPR reduction signals is based at least in part on a first bandwidth of the communications from the set of UEs or a second bandwidth of the communication from the relay device. ### Claim 28 (depends on 23) The method of claim 23, wherein the configuration for PAPR reduction signals is based at least in part on a UE capability associated with PAPR reduction or a PAPR target for a transmission by the relay device, or a PAPR reduction capability or a PAPR target for a reception by the relay device, or a combination thereof. ### Claim 29 (depends on 23) The method of claim 23, wherein the configuration for PAPR reduction signals is based at least in part on a numerology, a waveform, an adjacent channel leakage ratio, a guard band configuration, a UE capability indication, a UE power class, a bandwidth of an active bandwidth part, a number of transmit antennas, a link budget or coverage requirement, or a combination thereof. ### Claim 30 (depends on 23) The method of claim 23, further comprising: receiving, from the relay device, signals comprising the communications from the UEs and one or more PAPR reduction signals in accordance with the indicated configuration; demultiplexing communications signaling associated with the communications from the received signals; and processing the communications signaling independent of the one or more PAPR reduction signals to obtain data streams, control information, reference signals, or a combination thereof from the set of UEs.