# US 2022/0022236 A1 · 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 2022/0022236 A1 - Document ID: US20220022236A1 - Status: Published application - Kind: A1 - Application number: 17/377,153 - Filed: 2021-07-15 - Published: 2022-01-20 - Earliest claimed: 2020-07-16 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Junyi Li; Juergen Cezanne; Vasanthan Raghavan - Web page: https://patentgrep.com/patent/US20220022236A1 ## 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: a processor; and memory coupled to the processor, the processor and memory configured to: receive, from a base station, downlink control information (DCI) indicating a set of allocated resources that the UE is to utilize for tone reservation; transmit a data signal on a first set of tones from the set of allocated resources based at least in part on the DCI; and transmit a peak-reduction signal on a second set of tones being different from the first set of tones. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the processor and memory are further configured to: determine the DCI comprises a first DCI and a second DCI, the first DCI indicating the first set of tones and the second DCI indicating the second set of tones; 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 processor and memory are further configured to: determine the second RNTI indicates one or more resources from a set of allocated resources for transmission of the second set of tones; and transmit a peak-reduction signal on the second set of tones based at least in part on the second RNTI. ### Claim 4 (depends on 2) The apparatus of claim 2, 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 processor and memory are further configured to: receive a message comprising a monitoring configuration for the first RNTI and the second RNTI; and monitor for the first RNTI or the second RNTI based at least in part on receiving the monitoring configuration. ### Claim 6 (depends on 5) The apparatus of claim 5, the monitoring configuration comprising 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 processor and memory are further configured to: determine the DCI comprises a first field and a second field, the first field indicating the first set of tones and the second field indicating the second set of tones; and receive, in a codeword, the first field and the second field. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the processor and memory are further configured to: determine the peak-reduction signal reduces a peak to average power ratio (PAPR) value associated with the uplink transmission; identify a PAPR value that exceeds a threshold PAPR value for an uplink transmission; and receive, in the DCI, an allocation of the first set of tones that is within a threshold frequency distance from the second set of tones based at least in part on the identified PAPR value. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the processor and memory are further configured to: transmit, to the base station, a request for a number of tones to be allocated to the second set of tones for transmission of the peak-reduction signal in accordance with a reduced PAPR value; and receive the DCI based at least in part on the request. ### Claim 10 (depends on 9) The apparatus of claim 9, the request for the number of tones comprising at least portion of a power headroom report. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the processor and memory are further configured to: determine that the second set of tones is common to the UE and one or more other UEs; identify a proximity relationship between the first set of tones and the second set of tones of the set of allocated resources, a tone reservation capability of the UE being based at least in part on the proximity relationship; and transmit the data signal and the peak-reduction signal based at least in part on the proximity relationship. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the processor and memory are further configured to: determine the proximity relationship is associated with a difference in frequency between the first set of tones and the second set of tones. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the processor and memory are further configured to: transmit, to a base station, 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 peak-reduction signal based at least in part on the tone reservation capability. ### Claim 14 (depends on 13) The apparatus of claim 13, the tone reservation capability of the UE comprising a power amplification class, a number of antenna elements, a number of radio frequency chains, a number of multiple-input multiple-output layers, a maximum power reduction value, or any combination thereof. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein the processor and memory are further configured to: determine that the first set of tones for transmitting the data signal at the UE is different from a third set of tones for transmitting a second data signal by a second UE; determine that the second set of tones for transmitting the peak-reduction signal at the UE at least partially overlap with a fourth set of tones for transmitting a second peak reduction-signal by the second UE; and transmit the peak-reduction signal on the second set of tones based at least in part on a simultaneous transmission by the second UE. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the processor and memory are further configured to: identify a first RNTI associated the first set of tones for transmitting the data signal at the UE that is different from a second RNTI associated with the third set of tones for transmitting the second data signal by the second UE, the first RNTI and the second RNTI being different from a third RNTI that is common to the second set of tones and the fourth set of tones. ### Claim 17 (depends on 15) The apparatus of claim 15, wherein the processor and memory are further configured to: determine the second set of tones for transmitting the peak-reduction signal at least partially overlap with the third set of tones for transmitting the second data signal, the fourth set of tones for transmitting the second peak-reduction signal, or both; and transmit the peak-reduction signal based at least in part on the overlap. ### Claim 18 (depends on 15) The apparatus of claim 15, wherein the processor and memory are further configured to: transmit the first set of tones on a first beam of the set of allocated resources; and transmit the second set of tones on a second beam of the set of allocated resources. ### Claim 19 (depends on 1) The apparatus of claim 1, wherein the processor and memory are further configured to: determine that the DCI indicates whether the second set of tones are allocated for transmission of the peak-reduction signal; identify a number of the second set of tones based at least in part on a function of the set of allocated resources; and transmit the peak-reduction signal on the second set of tones allocated by the DCI. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the processor and memory are further configured to: refrain from monitoring an RNTI associated with the second set of tones based at least in part on a determination that the second set of tones are not allocated for transmission of the peak-reduction signal. ### Claim 21 (depends on 19) The apparatus of claim 19, the function of the set of allocated resources comprising a fraction of the set of allocated resources, a fraction of a total number of tones, or both. ### Claim 22 (depends on 19) The apparatus of claim 19, wherein the processor and memory are further configured to: receive a control message that comprises a configuration for the second set of tones. ### Claim 23 An apparatus for wireless communications at a base station, comprising: a processor; and memory coupled to the processor, the processor and memory configured to: transmit downlink control information (DCI) indicating 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 tones for transmission of a data signal and a second set of tones for transmission of a peak-reduction signal, the second set of tones being different from the first set of tones; and receive, from the UE, the data signal on the first set of tones and the peak-reduction signal on the second set of tones based at least in part on the DCI. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the DCI comprises a first DCI and a second DCI, the first DCI indicating the first set of tones and the second DCI indicating the second set of tones, wherein the processor and memory are further configured 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 25 (depends on 24) The apparatus of claim 24, wherein the processor and memory are further configured to: determine the second RNTI indicates one or more resources from a set of allocated resources for transmission of the second set of tones; and receive a peak-reduction signal on the second set of tones based at least in part on the second RNTI. ### Claim 26 (depends on 24) The apparatus of claim 24, the first codeword and the first RNTI being different from the second codeword and the second RNTI. ### Claim 27 (depends on 24) The apparatus of claim 24, wherein the processor and memory are further configured to: transmit a message comprising a monitoring configuration for the first RNTI and the second RNTI; and monitor for the first RNTI or the second RNTI based at least in part on receiving the monitoring configuration. ### Claim 28 (depends on 24) The apparatus of claim 24, wherein the processor and memory are further configured to: transmit, in a codeword, the DCI comprising a first field and a second field, the first field indicating the first set of tones and the second field indicating the second set of tones. ### Claim 29 A method for wireless communications at a user equipment (UE), comprising: receiving, from a base station, downlink control information (DCI) indicating a set of allocated resources that the UE is to utilize for tone reservation; transmitting a data signal on a first set of tones from the set of allocated resources based at least in part on the DCI; and transmitting a peak-reduction signal on a second set of tones being different from the first set of tones. ### Claim 30 A method for wireless communications at a base station, comprising: transmitting downlink control information (DCI) indicating 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 tones for transmission of a data signal and a second set of tones for transmission of a peak-reduction signal, the second set of tones being different from the first set of tones; and receiving, from the UE, the data signal on the first set of tones and the peak-reduction signal on the second set of tones based at least in part on the DCI.