# US 12,114,320 B2 · DCI-based tone reservation for power control > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,320 B2 - Document ID: US12114320B2 - Status: Granted - Kind: B2 - Application number: 17/377,153 - Filed: 2021-07-15 - Published: 2022-01-20 - Granted: 2024-10-08 - Earliest claimed: 2020-07-16 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Junyi Li; Juergen Cezanne; Vasanthan Raghavan - Web page: https://patentgrep.com/patent/US12114320B2 ## CPC - H04L 27/2618: {Reduction thereof using auxiliary subcarriers} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 27/2614: {Peak power aspects} - H04W 28/26: Resource reservation - H04W 52/365: {Power headroom reporting} - 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 Methods, systems, and devices for wireless communications are described. To reduce peak-to-average power ratio (PAPR) associated with transmissions in a wireless communications system, a user equipment (UE) may implement tone reservation techniques. The UE may receive downlink control information from a base station that indicates a set of allocated resources that the UE is to use for the tone reservation. The UE may identify a first set of tones of the set of allocated resources for transmitting a data signal and a second set of tones of the set of allocated resources for transmitting a peak-reduction signal that reduces the peak power of the data signal. The UE may transmit the data signal and the peak-reduction signal based on the received downlink control information. ## Claims ### Claim 1 An apparatus for wireless communications at a user equipment (UE), comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to cause the UE to: receive downlink control information (DCI) that indicates a set of allocated resources the UE is to utilize for tone reservation, wherein the DCI comprises a first DCI and a second DCI, wherein the first DCI is indicative of a first set of data tones and the second DCI is indicative of a first set of peak-reduction tones; and transmit a signal comprising a combination of the first set of data tones and the first set of peak-reduction tones from the set of allocated resources based at least in part on the DCI, wherein the first set of data tones is different from the first set of peak-reduction tones. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to cause the UE to: receive, in a first codeword, the first DCI associated with a first radio network temporary identifier (RNTI); and receive, in a second codeword, the second DCI associated with a second RNTI, the first RNTI different from the second RNTI. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the one or more processors are further configured to cause the UE to: determine the second RNTI indicates one or more resources from the set of allocated resources for transmission of the first set of peak-reduction tones; and transmit a peak-reduction signal on the first set of peak-reduction tones based at least in part on the second RNTI. ### Claim 4 (depends on 2) The apparatus of claim 2, wherein the first codeword and the first RNTI is different from the second codeword and the second RNTI. ### Claim 5 (depends on 2) The apparatus of claim 2, wherein the one or more processors are further configured to cause the UE to: receive a message comprising a configuration to monitor for the first RNTI and the second RNTI; and monitor for the first RNTI or the second RNTI based at least in part on the configuration. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the configuration comprises a radio resource control (RRC) message, a remaining minimum system information (RMSI) message, or both. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to cause the UE to: determine the signal comprises a peak-reduction signal that reduces a peak to average power ratio (PAPR) value associated with an uplink transmission; identify a PAPR value that exceeds a threshold PAPR value for the uplink transmission; and receive, in the first DCI, an allocation of the first set of data tones that is within a threshold frequency distance from the first set of peak-reduction tones based at least in part on the identified PAPR value. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the one or more processors are further configured to cause the UE to: transmit a request for a quantity of tones to be allocated to the first set of peak-reduction tones for transmission of the peak-reduction signal in accordance with a reduced PAPR value; and receive the second DCI based at least in part on the request. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the request for the quantity of tones comprises at least a portion of a power headroom report. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to cause the UE to: determine that the first set of peak-reduction tones is common to the UE and one or more other UEs; identify a proximity relationship between the first set of data tones and the first set of peak-reduction tones, wherein a tone reservation capability of the UE is based at least in part on the proximity relationship; and transmit the signal based at least in part on the proximity relationship. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the one or more processors are configured to cause the UE to: determine the proximity relationship is associated with a difference in frequency between the first set of data tones and the first set of peak-reduction tones. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to cause the UE to: transmit an indication of a tone reservation capability for an uplink transmission by the UE; determine the set of allocated resources is scheduled by the DCI in accordance with the tone reservation capability of the UE; and configure the signal based at least in part on the tone reservation capability. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the tone reservation capability of the UE comprises a power amplification class, a quantity of antenna elements, a quantity of radio frequency chains, a quantity of multiple-input multiple-output layers, a maximum power reduction value, or any combination thereof. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to cause the UE to: determine that the first set of data tones to transmit a data signal at the UE is different from a second set of data tones to transmit a second data signal by a second UE; determine that the first set of peak-reduction tones associated with a first peak-reduction signal at the UE at least partially overlaps with a second set of peak-reduction tones associated with a second peak-reduction signal; and transmit the first peak-reduction signal on the first set of peak-reduction tones based at least in part on a simultaneous transmission by the second UE. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the one or more processors are further configured to cause the UE to: identify a first RNTI associated with the first set of data tones associated with the data signal at the UE that is different from a second RNTI associated with the second set of data tones associated with the second data signal, wherein the first RNTI and the second RNTI are different from a third RNTI that is common to the first set of peak-reduction tones and the second set of peak-reduction tones. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the one or more processors are further configured to cause the UE to: determine the first set of peak-reduction tones associated with the first peak-reduction signal at least partially overlaps with the second set of data tones associated with the second data signal, wherein the second set of peak-reduction tones is associated with the second peak-reduction signal; and transmit the first peak-reduction signal based at least in part on the overlap. ### Claim 17 (depends on 14) The apparatus of claim 14, wherein the one or more processors are further configured to cause the UE to: transmit the first set of data tones on a first beam of the set of allocated resources; and transmit the first set of peak-reduction tones on a second beam of the set of allocated resources. ### Claim 18 (depends on 14) The apparatus of claim 14, wherein the one or more processors are further configured to cause the UE to: determine that the second DCI indicates whether the first set of peak-reduction tones are allocated for transmission of the first peak-reduction signal; identify a quantity of the first set of peak-reduction tones based at least in part on a function of the set of allocated resources; and transmit the first peak-reduction signal on the first set of peak-reduction tones allocated by the second DCI. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the one or more processors are further configured to cause the UE to: refrain from monitoring an RNTI associated with the first set of peak-reduction tones based at least in part on a determination that the first set of peak-reduction tones are not allocated for transmission of the first peak-reduction signal. ### Claim 20 (depends on 18) The apparatus of claim 18, wherein the function of the set of allocated resources comprises a fraction of the set of allocated resources, a fraction of a total quantity of tones, or both. ### Claim 21 (depends on 18) The apparatus of claim 18, wherein the one or more processors are further configured to cause the UE to: receive a control message that comprises a configuration for the first set of peak-reduction tones. ### Claim 22 An apparatus for wireless communications at a network device, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to cause the network device to: transmit downlink control information (DCI) that indicates a set of allocated resources a user equipment (UE) is to utilize for tone reservation, the set of allocated resources comprising a first set of data tones and a first set of peak-reduction tones for transmission of a signal, wherein the first set of peak-reduction tones is different from the first set of data tones, and wherein the DCI comprises a first DCI and a second DCI, wherein the first DCI is indicative of the first set of data tones and the second DCI is indicative of the first set of peak-reduction tones; and receive the signal comprising a combination of the first set of data tones and the first set of peak-reduction tones based at least in part on the DCI. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the one or more processors are further configured to cause the network device to: transmit the first DCI in a first codeword associated with a first radio network temporary identifier (RNTI); and transmit the second DCI in a second codeword associated with a second RNTI, the first RNTI different from the second RNTI. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the one or more processors are further configured to cause the network device to: determine the second RNTI indicates one or more resources from the set of allocated resources for transmission of the first set of peak-reduction tones; and receive the signal on the first set of peak-reduction tones based at least in part on the second RNTI. ### Claim 25 (depends on 23) The apparatus of claim 23, wherein the first codeword and the first RNTI is different from the second codeword and the second RNTI. ### Claim 26 (depends on 23) The apparatus of claim 23, wherein the one or more processors are further configured to cause the network device to: transmit a message comprising a configuration to monitor for the first RNTI and the second RNTI; and monitor for the first RNTI or the second RNTI based at least in part on the configuration. ### Claim 27 A method for wireless communications at a user equipment (UE), comprising: receiving, downlink control information (DCI) that indicates a set of allocated resources the UE is to utilize for tone reservation, wherein the DCI comprises a first DCI and a second DCI, wherein the first DCI is indicative of a first set of data tones and the second DCI is indicative of a first set of peak-reduction tones; and transmitting a signal comprising a combination of the first set of data tones and the first set of peak-reduction tones from the set of allocated resources based at least in part on the DCI, wherein the first set of data tones is different from the first set of peak-reduction tones. ### Claim 28 (depends on 27) The method of claim 27, further comprising: receiving, in a first codeword, the first DCI associated with a first radio network temporary identifier (RNTI); and receiving, in a second codeword, the second DCI associated with a second RNTI, the first RNTI different from the second RNTI. ### Claim 29 (depends on 28) The method of claim 28, further comprising: determining the second RNTI indicates one or more resources from the set of allocated resources for transmission of the first set of peak-reduction tones; and transmitting a peak-reduction signal on the first set of peak-reduction tones based at least in part on the second RNTI. ### Claim 30 (depends on 28) The method of claim 28, wherein the first codeword and the first RNTI are different from the second codeword and the second RNTI. ### Claim 31 (depends on 28) The method of claim 28, further comprising: receiving a message comprising a configuration to monitor for the first RNTI and the second RNTI; and monitoring for the first RNTI or the second RNTI based at least in part on the configuration. ### Claim 32 A method for wireless communications at a network device, comprising: transmitting downlink control information (DCI) that indicates a set of allocated resources that a user equipment (UE) is to utilize for tone reservation, the set of allocated resources comprising a first set of data tones and a first set of peak-reduction tones for transmission of a signal, the first set of peak-reduction tones is different from the first set of data tones, and wherein the DCI comprises a first DCI and a second DCI, wherein the first DCI is indicative of the first set of data tones and the second DCI is indicative of the first set of peak-reduction tones; and receiving the signal comprising a combination of the first set of data tones and the first set of peak-reduction tones based at least in part on the DCI. ### Claim 33 (depends on 32) The method of claim 32, the method further comprising: transmitting the first DCI in a first codeword associated with a first radio network temporary identifier (RNTI); and transmitting the second DCI in a second codeword associated with a second RNTI, the first RNTI different from the second RNTI. ### Claim 34 (depends on 33) The method of claim 33, further comprising: determining the second RNTI indicates one or more resources from the set of allocated resources for transmission of the first set of peak-reduction tones; and receiving a peak-reduction signal on the first set of peak-reduction tones based at least in part on the second RNTI. ### Claim 35 (depends on 33) The method of claim 33, wherein the first codeword and the first RNTI that is different from the second codeword and the second RNTI. ### Claim 36 (depends on 33) The method of claim 33, further comprising: transmitting a message comprising a configuration for the UE to monitor for the first RNTI and the second RNTI; and monitoring for the first RNTI or the second RNTI based at least in part on the configuration. ### Claim 37 A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE), the code comprising instructions executable by one or more processors to cause the UE to: receive downlink control information (DCI) indicating a set of allocated resources the UE is to utilize for tone reservation, wherein the DCI comprises a first DCI and a second DCI, wherein the first DCI is indicative of a first set of data tones and the second DCI is indicative of a first set of peak-reduction tones; and transmit a signal comprising a combination of the first set of data tones and the first set of peak-reduction tones from the set of allocated resources based at least in part on the DCI, wherein the first set of data tones is different from the first set of peak-reduction tones. ### Claim 38 (depends on 37) The non-transitory computer-readable medium of claim 37, wherein the instructions are further executable by the one or more processors to cause the UE to: receive, in a first codeword, the first DCI associated with a first radio network temporary identifier (RNTI); and receive, in a second codeword, the second DCI associated with a second RNTI, the first RNTI different from the second RNTI. ### Claim 39 (depends on 38) The non-transitory computer-readable medium of claim 38, wherein the instructions are further executable by the one or more processors to cause the UE to: determine the second RNTI indicates one or more resources from the set of allocated resources for transmission of the first set of peak-reduction tones; and transmit a peak-reduction signal on the first set of peak-reduction tones based at least in part on the second RNTI. ### Claim 40 (depends on 38) The non-transitory computer-readable medium of claim 38, wherein the first codeword and the first RNTI are different from the second codeword and the second RNTI. ### Claim 41 (depends on 38) The non-transitory computer-readable medium of claim 38, wherein the instructions are further executable by the one or more processors to cause the UE to: receive a message comprising a configuration to monitor for the first RNTI and the second RNTI; and monitor for the first RNTI or the second RNTI based at least in part on the configuration. ### Claim 42 A non-transitory computer-readable medium storing code for wireless communications at a network device, the code comprising instructions executable by one or more processors to cause the network device to: transmit downlink control information (DCI) that indicates a set of allocated resources a user equipment (UE) is to utilize for tone reservation, the set of allocated resources comprising a first set of data tones and a first set of peak-reduction tones for transmission of a signal, wherein the first set of peak-reduction tones is different from the first set of data tones, and wherein the DCI comprises a first DCI and a second DCI, wherein the first DCI is indicative of the first set of data tones and the second DCI is indicative of the first set of peak-reduction tones; and receive the signal comprising a combination of the first set of data tones and the first set of peak-reduction tones based at least in part on the DCI. ### Claim 43 (depends on 42) The non-transitory computer-readable medium of claim 42, wherein the instructions are further executable by the one or more processors to cause the network device to: transmit the first DCI in a first codeword associated with a first radio network temporary identifier (RNTI); and transmit the second DCI in a second codeword associated with a second RNTI, the first RNTI different from the second RNTI. ### Claim 44 (depends on 43) The non-transitory computer-readable medium of claim 43, wherein the instructions are further executable by the one or more processors to cause the network device to: determine the second RNTI indicates one or more resources from the set of allocated resources for transmission of the first set of peak-reduction tones; and receive a peak-reduction signal on the first set of peak-reduction tones based at least in part on the second RNTI. ### Claim 45 (depends on 43) The non-transitory computer-readable medium of claim 43, wherein the first codeword and the first RNTI are different from the second codeword and the second RNTI. ### Claim 46 (depends on 43) The non-transitory computer-readable medium of claim 43, wherein the instructions are further executable by the one or more processors to cause the network device to: transmit a message comprising a configuration to monitor for the first RNTI and the second RNTI; and monitor for the first RNTI or the second RNTI based at least in part on the configuration.