Tone preservation for peak-to-average power ratio reduction

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user device may receive a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of peak reduction tones (PRTs) in a plurality of PRTs, wherein the resource allocation indicates a location for the plurality of data tones and a location for the plurality of PRTs within a particular bandwidth, wherein the locations for the plurality of PRTs are arranged relative to the locations for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth; and sending a data transmission using a waveform based at least in part on the resource allocation. Many other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 019,806, filed on May 4, 2020, entitled “TONE RESERVATION FOR PEAK TO AVERAGE POWER RATIO REDUCTION,” and U.S. Non-Provisional Patent Application No. 17 / 306,762, filed on May 3, 2021, entitled “TONE RESERVATION FOR PEAK TO AVERAGE POWER RATIO REDUCTION,” which are expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for tone preservation for peak-to-average power ratio reduction. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a collection of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include several base stations (BSs) that may support communications for several user equipments (UEs). A UE may communicate with a BS via a downlink and an uplink. A "downlink" (or "forward link") refers to a communication link from a BS to a UE, and an "uplink" (or "reverse link") refers to a communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate at municipal, national, regional and even global levels. NR (which may also be referred to as 5G) is a collection of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL) to better integrate with other open standards, as well as support beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR and other radio access technologies remain useful. Summary of the invention

[0007] In some aspects, a method of wireless communications performed by a user equipment (UE) may include receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones among a plurality of data tones and a subset of peak reduction tones (PRTs) among a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth; and sending a data transmission using a waveform based at least in part on the resource allocation.

[0008] In some aspects, a method of wireless communications performed by a base station may include sending a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones among a plurality of data tones and a subset of PRTs among a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRTs correspond to a subband of the particular bandwidth; and receiving a data transmission including a waveform based at least in part on the resource allocation.

[0009] In some aspects, a UE for wireless communication may include a memory; one or more processors operably coupled to the memory; and instructions stored in the memory. The instructions in the memory, when executed by the one or more processors, are operable to cause the UE to receive a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of PRTs in a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth; and send a data transmission using a waveform based at least in part on the resource allocation.

[0010] In some aspects, a base station for wireless communication may include a memory; one or more processors operably coupled to the memory; and instructions stored in the memory. The instructions in the memory, when executed by the one or more processors, are operable to cause the base station to send a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of PRTs in a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRTs correspond to a subband of the particular bandwidth; and receive a data transmission including a waveform based at least in part on the resource allocation.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication, which when executed by one or more processors of a UE may cause the UE to receive a resource allocation indicating multiple transmission tones, the multiple transmission tones including a subset of data tones among a plurality of data tones and a subset of PRTs among a plurality of PRTs, wherein the resource allocation indicates positions for the multiple data tones and positions for the multiple PRTs within a specific bandwidth, wherein the positions for the multiple PRTs are arranged relative to the positions for the multiple data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the specific bandwidth; and send a data transmission using a waveform based at least in part on the resource allocation.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication, which when executed by one or more processors of a base station may cause the base station to send a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones among a plurality of data tones and a subset of PRTs among a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRTs correspond to a subband of the particular bandwidth; and receive a data transmission including a waveform based at least in part on the resource allocation.

[0013] In some aspects, an apparatus for wireless communication may include components for receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones among a plurality of data tones and a subset of PRTs among a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth; and components for sending a data transmission using a waveform based at least in part on the resource allocation.

[0014] In some aspects, an apparatus for wireless communication may include components for sending a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones among a plurality of data tones and a subset of PRTs among a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth; and components for receiving a data transmission including a waveform based at least in part on the resource allocation.

[0015] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as generally described herein with reference to and as illustrated in the accompanying drawings and description.

[0016] The features and technical advantages of the examples according to the present disclosure have been outlined quite extensively above so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein (both their organization and methods of operation) and the associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and not as a definition of the limitations of the claims.

[0017] Although various aspects are described in the present disclosure by illustrating some examples, it will be understood by those skilled in the art that these aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip embodiments or other non-module-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchase equipment, medical devices, or devices supporting artificial intelligence). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. The device incorporating the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or summers, etc.). The aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements, or end-user devices of different sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order that the above-mentioned features of the present disclosure may be understood in detail, a more specific description of the contents briefly summarized above may be obtained by reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings illustrate only certain typical aspects of the present disclosure and should not be considered as limiting the scope thereof, as the description may allow for other equivalent aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 is a diagram illustrating an example of a base station communicating with a UE in a wireless network according to the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of tone preservation for peak-to-average power ratio reduction according to the present disclosure.

[0022] Figure 4 is a diagram illustrating an example process performed, for example, by a user device according to the present disclosure.

[0023] Figure 5 is a diagram illustrating an example process performed, for example, by a base station according to the present disclosure. DETAILED DESCRIPTION

[0024] Typical methods for peak reduction tone (PRT) selection to reduce the peak-to-average power ratio (PAPR) in a power amplifier of a user equipment (UE) using an orthogonal frequency division multiplexing (OFDM) signal may introduce unnecessary processing, which may cause performance degradation. In addition, the selection of the PRT may not be known to the base station, and therefore will need to be signaled to the base station to facilitate decoding by the base station, thereby increasing signaling overhead. Aspects of the techniques and devices described herein can facilitate PRT reservation for reducing the PAPR of a power amplifier in a UE. In some aspects, the tone reservation techniques described herein can facilitate PRT position determination based on established patterns, sequences, tables, etc. In some aspects, a PRT subsequence of a general PRT sequence can be associated with an allocated bandwidth. The UE can use a PRT subsequence and / or a PRT from the remainder of the PRT sequence. The base station can indicate the PRT sequence to the UE. In this way, the PRT position can be determined without optimizing the random PRT index selection in real time, thereby reducing the complexity of the operation of the transmitter. This can facilitate saving power and time during transmission, thereby improving performance, reducing computational burden, etc.

[0025] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms, and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings of this article, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method that is practiced using other structures, functions, or structures and functions other than the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claim.

[0026] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0027] It should be noted that although terms generally associated with 5G or NR radio access technologies (RATs) are used herein to describe various aspects, various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or RATs after 5G (e.g., 6G).

[0028] Figure 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. Among other examples, the wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network. The wireless network 100 may include several base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0029] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access to UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1In the example shown, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "node B", "5G NB", and "cell" may be used interchangeably herein.

[0030] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces (such as direct physical connections or virtual networks) using any suitable transport network.

[0031] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that is capable of relaying transmissions for other UEs. Figure 1 In the illustrated example, a relay BS 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay BS may also be referred to as a relay station, a relay base station, a relay, or the like.

[0032] The wireless network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay BS, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0033] The network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. These BSs may also communicate with each other directly or indirectly via a wireless or wired backhaul.

[0034] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0035] Some UEs may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to a network (e.g., a wide area network, such as the Internet or a cellular network) or to a network, for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as user premises equipment (CPE). UE 120 may be included in a housing that houses components of UE 120 (such as a processor component and / or a memory component). In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0036] Generally, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0037] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more side link channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol or vehicle-to-infrastructure (V2I) protocol) and / or mesh network. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0038] The devices of the wireless network 100 can communicate using an electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 can communicate using an operating frequency band having a first frequency range (FR1), which can span from 410 MHz to 7.125 GHz, and / or can communicate using an operating frequency band having a second frequency range (FR2), which can span from 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as a "below 6 GHz" band. Similarly, FR2 is generally referred to as a "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise specifically stated, it should be understood that the terms "sub-6 GHz," etc., if used herein, may broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that the terms "millimeter wave," etc., if used herein, may broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0039] As mentioned above, Figure 1 are provided as examples. Other examples may be related to Figure 1 Different than described.

[0040] Figure 2is a diagram illustrating an example 200 of a base station 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with T antennas 234a through 234t, and the UE 120 may be equipped with R antennas 252a through 252r, where in general T≥1 and R≥1.

[0041] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for the UE based at least in part on the (multiple) MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively.

[0042] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0043] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0044] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include, or may be included within, one or more antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include sets of coplanar antenna elements and / or sets of non-coplanar antenna elements. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include antenna elements within a single housing and / or antenna elements within multiple housings. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include antenna elements coupled to one or more transmitting and / or receiving components (such as Figure 2 One or more antenna elements of one or more components).

[0045] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antennas 252, modulators and / or demodulators 254, MIMO detectors 256, receive processors 258, transmit processors 264, and / or TX MIMO processors 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (e.g., as described in reference to Figure 3-Figure 5 described).

[0046] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communications. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antennas 234, modulators and / or demodulators 232, MIMO detectors 236, receive processors 238, transmit processors 220, and / or TX MIMO processors 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (e.g., as described in reference to Figure 3-Figure 5 described).

[0047] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components of the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the can perform or direct e.g. Figure 4 The process of 400 Figure 5 10 and / or other processes described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, conversion, and / or interpretation), may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example, Figure 4 The process of 400 Figure 5 The process 500 and / or operations of other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0048] When the stored program code is executed by the processor 280 and / or other processors and modules at the UE 120, the UE 120 may perform the following operations: Figure 4 The stored program code, when executed by the processor 240 and / or other processors and modules at the base station 110, may cause the base station 110 to perform operations related to Figure 5 The operations described by process 500 and / or other processes as described herein. The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0049] In some aspects, UE 120 may include means for receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of PRTs in a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth; and means for sending a data transmission using a waveform based at least in part on the resource allocation, among other things. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are described.

[0050] In some aspects, base station 110 may include means for transmitting a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of PRTs in a plurality of PRTs, wherein the resource allocation indicates a plurality of data tone locations within a particular bandwidth, wherein the resource allocation indicates locations for the plurality of data tones and locations for the plurality of PRTs within the particular bandwidth, wherein the locations for the plurality of PRTs are arranged relative to the locations for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth; means for receiving a data transmission including a waveform based at least in part on the resource allocation, etc. In some aspects, such means may include in conjunction with Figure 2 One or more components of base station 110 are described.

[0051] Although Figure 2 The blocks in the 200 and 210 are illustrated as distinct components, but the functionality described above with respect to the blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0052] As mentioned above, Figure 2 are provided as examples. Other examples may be related to Figure 2 Different than described.

[0053] Commercial power amplifiers typically have nonlinear behavior if operated at high input power. This nonlinearity can cause in-band and out-of-band distortion of the signal, as well as a degraded error vector magnitude (EVM) at the receiver of the signal. To avoid nonlinearity, the power amplifier can be operated at an average input power several dB below the saturation point. The appropriate power level can be determined by determining the input power that keeps the peak-to-average power ratio (PAPR) of the signal below a certain level.

[0054] It is known that Orthogonal Frequency Division Multiplexing (OFDM) signals suffer from significant PAPR, which grows rapidly due to the size of the frequency blocks. 5G NR is being developed to support higher data rates than LTE. Therefore, the 5G NR OFDM block size can be larger than the LTE block size, further increasing the PAPR of the signal. Some PAPR reduction techniques may be data-dependent and computationally expensive, making them unsuitable for real-time implementation in the context of 5G NR transmitters. As a result, limiting and filtering (CF) is often used in industry. CF causes in-band distortion and usually does not converge to the desired solution.

[0055] 5G NR provides ample bandwidth in both uplink and downlink. This is true because of the increase in frequency range 2 (FR2) in 5G NR and the increase in available bandwidth to 100MHz in the sub-6GHz frequency range. This excess bandwidth is partially utilized by using longer OFDM symbols, which further increases the PAPR of OFDM. This excess bandwidth can also be used for PAPR reduction through a technique called tone reservation.

[0056] Tone reservation can allow a transmitter to utilize some otherwise idle tones to reduce the PAPR of an OFDM signal. The amplitude and phase of the reserved tones can be optimized for a given OFDM symbol to minimize the PAPR of the associated signal. In some cases, there may be no overlap between data tones and reserved tones. In this way, tone reservation can be used without introducing any EVM or adjacent channel leakage ratio. The receiver can simply ignore the signal portion associated with the reserved tones and only decode the signal portion associated with the data tones.

[0057] Tone retention can be performed by determining a PRT that is configured to reduce the peak value of the resulting OFDM signal so that the PAPR of the resulting signal meets a threshold. The PRT can be generated using a signal-to-clipping-to-noise ratio tone retention (SCR-TR) algorithm. The SCR-TR algorithm can be used to optimize the value of the PRT tone based at least in part on the position of the PRT tone.

[0058] The UE may be assigned a plurality of N transmission tones with corresponding plurality of tone position indices {1, ..., N}. If Φ is a subset of {1, ..., N} corresponding to the PRT positions, the remaining transmission tone positions may be assigned to data tones with the subset of tone position indices {1, ..., N}\Φ. The frequency domain kernel P may be constructed i , so that:

[0059]

[0060] and p = iDFT(P). X can be frequency domain data. Therefore, if i∈Φ and x = iDFT(X), then X i =0.

[0061] According to the SCR-TR algorithm, the location of the maximum peak of x is identified and its index is denoted by j∈[LN], where L is the oversampling factor. SCR-TR consists of cyclic shifts p, p j = circshift(p,j) so that the peaks are aligned. SCR-TR also includes subtracting the scaled and shifted p from x to obtain:

[0062]

[0063] where μ is the target peak, <x(j) is the phase of x(j), This process is iterated several times to reduce several peaks. If the number of retained tones is large enough and the positions are chosen appropriately, the time domain kernel p looks like a narrow delta. In addition, the cyclic shift p in the time domain does not affect the position of the PRTs in the frequency domain - it only disturbs their phase.

[0064] In some cases, PRT position selection may be performed by randomly selecting a plurality of PRT indices representing PRT positions, generating an OFDM signal based on the PRT and data tones, and determining whether the PAPR of the resulting signal satisfies a PAPR threshold. However, due to the random nature of the PRT selection for each iteration, these methods may introduce unnecessary processing, which may result in reduced performance. In addition, the selection of the PRT may not be known to the base station, and therefore will need to be signaled to the base station to facilitate decoding by the base station, thereby increasing signaling overhead.

[0065] Aspects of the techniques and apparatus described herein can facilitate PRT reservation for reducing the PAPR of a power amplifier in a UE. In some aspects, the tone reservation techniques described herein can facilitate PRT position determination based on established patterns, sequences, tables, etc. In this way, the PRT position can be determined without optimizing the random PRT index selection in real time, thereby reducing the complexity of the operation of the transmitter. This can facilitate power and time savings during transmission, thereby improving performance, reducing computational burden, etc.

[0066] In some aspects, a base station may allocate a plurality of transmission tones including a plurality of data tones and a plurality of PRTs to a UE. The plurality of transmission tones may indicate a position for the plurality of PRTs (a set of which may be referred to as a plurality of PRT positions), which is arranged according to a PRT subsequence of a general PRT sequence associated with a specific bandwidth, relative to a position for the plurality of data tones (a set of which may be referred to as a plurality of data tone positions). The PRT subsequence may correspond to a subband of a bandwidth associated with a resource allocation. In some aspects, the UE may be able to use all PRT tones in a general PRT sequence. In this way, aspects described herein provide a simple PRT selection that facilitates determination of PRT positions with little processing overhead, signaling overhead, etc. In some aspects, a plurality of PRT sequences, PRT subsequences, etc. may be used, and they may have varying power constraints. The base station may be able to scan the PRT sequence and / or instruct the UE to perform rate matching around one or more PRT subsequences, PRT sequences, etc. In this way, transmission conflicts may be minimized without unnecessary signaling overhead.

[0067] Figure 3 is a diagram illustrating an example 300 of tone preservation for peak-to-average power ratio reduction according to the present disclosure. As shown, a base station 110 and a UE 120 may communicate with each other.

[0068] As shown in reference numeral 302, the base station 110 may send a resource allocation and the UE 120 may receive the resource allocation. In some aspects, the resource allocation may be carried in a downlink control information (DCI), a radio resource control (RRC) message, a medium access control (MAC) control element (CE), etc. The resource allocation may indicate a plurality of transmission tones. The set 304 of transmission tones may include a plurality of data tones 306 (shown by the longer vertical bars) and a plurality of PRTs 308 (shown by the shorter vertical bars). The resource allocation may indicate a plurality of data tone locations 310 within a particular bandwidth (shown as "BW"). The resource allocation may indicate a plurality of PRT locations 312 within a particular bandwidth.

[0069] In some aspects, locations for multiple PRTs (multiple PRT locations) 312 may be arranged relative to locations for multiple data tones (multiple data tone locations) 310 according to a common PRT sequence 314. The common PRT sequence is a PRT sequence for the entire available bandwidth (e.g., 100 MHz bandwidth, etc.) and is used to allocate PRTs to multiple UEs. Figure 3Another universal PRT sequence 316 is shown. In some aspects, any number of universal PRT sequences 314, 316 can be configured for use in tone selection. As shown, resource allocation can indicate a PRT subsequence 318 of the universal PRT sequence 314. In some aspects, the PRT subsequence 318 corresponds to a subband of a specific bandwidth and is allocated to the UE. Other PRT subsequences 320, 322 and / or 324 of the universal PRT sequence 314 can be allocated to other UEs. In some aspects, each of the PRT subsequences 318, 320, 322 and 324 can be allocated to one of four different UEs 120. In some aspects, each UE in the UE set can use all PRT subsequences 318, 320, 322 and 324.

[0070] In some aspects, the subset of PRTs 308 may include all of the plurality of PRTs 308, and the subset of data tones 306 may include fewer data tones than the entire plurality of data tones 306. In other words, while the UE 120 may use only the data tones 306 of the allocated subband, in some aspects the UE 120 may use all of the PRTs 308 in the common PRT sequence 314 across bandwidth for PAPR reduction.

[0071] In some aspects, the resource allocation may indicate the PRT subsequence 318 by indicating a deterministic function for determining the PRT subsequence 318. In some aspects, the resource allocation may indicate the PRT subsequence 318 by referencing a PRT table (PRTT). In some aspects, the resource allocation may indicate a set of RBs, and the UE 120 may determine the PRT subsequence 318 based at least in part on the set of RBs using the PRTT. The PRTT may include multiple entries. In some aspects, an entry in the multiple entries may include a PRT subsequence 318, wherein the PRT subsequence 318 corresponds to a set of RBs, wherein at least one additional PRT subsequence 320, 322, and / or 324 corresponds to at least one additional set of RBs, one or more parameters of the deterministic function for determining the PRT subsequence 318, and the like.

[0072] In some aspects, the base station 110 may send, and the UE 120 may receive, an indication of a location of the universal PRT sequence 314 relative to the set of allocated RBs. In some aspects, the base station 110 may send, and the UE 120 may receive, an indication of a starting location of the universal PRT sequence 314. In some aspects, the starting location of the universal PRT sequence 314 comprises a PRT position 312 associated with an initial PRT 308 of the universal PRT sequence 314.

[0073] In some aspects, the indication of the starting position of the universal PRT sequence 314 may indicate the starting position of the universal PRT sequence 314 relative to the center of an initial subcarrier in an initial common RB. In some aspects, the indication of the starting position of the universal PRT sequence 314 may indicate the starting position of the universal PRT sequence 314 by indicating a frequency offset from the center of the initial subcarrier. In some aspects, the indication of the starting position of the universal PRT sequence 314 may indicate the starting position of the universal PRT sequence 314 relative to a synchronization signal block (SSB), wherein the SSB includes an initial RB of a common RB grid. In some aspects, the indication of the starting position of the universal PRT sequence 314 may be carried in a broadcast message, system information (SI), an RRC message, and the like.

[0074] As shown in the PRT sequence 316, in some aspects, there can be overlap between the PRT 308 and at least some of the data tones 306. For example, in various aspects, when bandwidth is insufficient, the base station 110 can instruct the UE 120 to transmit on one or more PRTs 308. In this way, the efficiency associated with resource allocation can be improved at the expense of a certain EVM. As shown in conjunction with the first PRT subsequence 326, there may be a partial overlap of the data tones 306 and the PRT 308. In some aspects, this partial overlap can introduce some EVM at the receiver (e.g., the base station 110). As shown in conjunction with the second PRT subsequence 328, there can be a complete overlap of the data tones 306 and the PRT 308. In some aspects, this situation can introduce a higher EVM than the EVM introduced in conjunction with the first PRT subsequence 326.

[0075] As shown in conjunction with the third PRT subsequence 330, a subset of the PRT 308 may not overlap with a subset of the data tones 306. In some aspects, the UE 120 may send a data transmission by rate matching around the subset of the PRT 308 associated with the PRT subsequence 330. As shown in conjunction with the fourth PRT subsequence 332, all available transmission tones associated with the corresponding subband may be used for both the data tones 306 and the PRT 308.

[0076] In some aspects, different energy constraints can be associated with different general PRT sequences 314 and 316, different PRT subsequences 318-332, etc. In some aspects, multiple sets of PRTs 308 can be defined, each set having a corresponding energy constraint that is different from each other corresponding energy constraint. For example, in some aspects, the set 304 of PRTs 308 associated with the first general PRT sequence 314 can correspond to a first energy constraint, and the additional plurality of PRTs 308 associated with the second general PRT sequence 316 can correspond to a second energy constraint. Any number n of additional sets of PRTs 308 can be defined. Each has a corresponding energy constraint P1, P2, ..., P n In some aspects, UE 120 may use all sets of PRT 308 And according to the energy constraints P1,P2,...,P n to limit the power of the corresponding PRT 308.

[0077] In some aspects, P1>P2>…>P n Base station 110 may scan the set of PRTs 308 from right to left (eg, from n to 1). tones for the UE 120 also for data tones because the set of PRTs 308 with higher indices have tighter energy constraints and, therefore, data transmissions will experience less interference from the corresponding PRTs 308.

[0078] As shown in reference numeral 334, UE 120 may generate a waveform based at least in part on the resource allocation. In some aspects, UE 120 may generate a waveform by determining an inverse discrete Fourier transform of the plurality of transmission tones. In some aspects, the waveform may include a CP-OFDM waveform. In some aspects, the waveform may include a DFT-s-OFDM waveform. In some aspects, a plurality of PRTs may be selected such that a PAPR associated with the waveform satisfies a PAPR threshold.

[0079] As indicated by reference number 336, the UE 120 may use the waveform to send data transmissions, and the base station 110 may use the waveform to receive data transmissions.

[0080] As mentioned above, Figure 3 are provided as examples. Other examples may be related to Figure 3 Different than described.

[0081] Figure 4 is a diagram illustrating an example process 400 performed, for example, by a UE in accordance with the present disclosure. Example process 400 is an example of a UE (eg, UE 120, etc.) performing operations associated with tone reservation for PAPR reduction.

[0082] like Figure 4As shown, in some aspects, process 400 may include receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of PRTs in a plurality of PRTs, wherein the resource allocation indicates a location for the plurality of data tones and a location for the plurality of PRTs within a particular bandwidth, wherein the location for the plurality of PRTs is arranged relative to the location for the plurality of data tones according to a PRT subsequence of a common PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth (block 410). For example, a UE (e.g., using a receive processor 258, a controller / processor 280, a memory 282, etc.) may receive a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of PRTs in a plurality of PRTs, as described above. In some aspects, the resource allocation indicates a location for the plurality of data tones and a location for the plurality of PRTs within a particular bandwidth. In some aspects, the location for the plurality of PRTs is arranged relative to the location for the plurality of data tones according to a PRT subsequence of a common PRT sequence. In some aspects, the PRT subsequences correspond to subbands of the particular bandwidth.

[0083] like Figure 4 As further shown, in some aspects, process 400 may include transmitting a data transmission using a waveform based at least in part on the resource allocation (block 420). For example, the UE (e.g., using transmit processor 264, controller / processor 280, memory 282, etc.) may transmit a data transmission using a waveform based at least in part on the resource allocation, as described above.

[0084] Process 400 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0085] In a first aspect, process 400 includes generating a waveform by determining an inverse discrete Fourier transform of a plurality of transmitted tones.

[0086] In a second aspect, alone or in combination with the first aspect, the waveform comprises a CP-OFDM waveform or a DFT-s-OFDM waveform.

[0087] In a third aspect, alone or in combination with one or more of the first and second aspects, the resource allocation is carried in at least one of: a DCI, an RRC message, a MAC-CE, or a combination thereof.

[0088] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the plurality of PRTs are selected such that a PAPR associated with the waveform satisfies a PAPR threshold.

[0089] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the subset of PRTs includes the entire plurality of PRTs, and the subset of data tones includes data tones less than the entire plurality of data tones.

[0090] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the resource allocation indicates the PRT subsequence by indicating a deterministic function used to determine the PRT subsequence.

[0091] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the resource allocation indicates a PRT subsequence by reference to a PRTT.

[0092] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the resource allocation indicates a set of RBs, and the process 400 further comprises determining a PRT subsequence based at least in part on the set of RBs using the PRTT.

[0093] In a ninth aspect, either alone or in combination with one or more of aspects one to eight, the PRTT comprises a plurality of entries, and the entries in the plurality of entries comprise at least one of: the PRT subsequence, wherein the PRT subsequence corresponds to a set of RBs, an additional PRT subsequence corresponding to an additional set of RBs, one or more parameters of a deterministic function for determining the PRT subsequence, or a combination thereof.

[0094] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, process 400 includes receiving an indication of a location of a common PRT sequence relative to a set of allocated RBs.

[0095] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the process 400 includes receiving an indication of a starting position of a generic PRT sequence.

[0096] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the starting position of the universal PRT sequence comprises a PRT position associated with an initial PRT of the universal PRT sequence.

[0097] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the indication of the starting position of the common PRT sequence indicates the starting position of the common PRT sequence relative to the center of an initial subcarrier in an initial common resource block.

[0098] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the indication of the starting position of the universal PRT sequence indicates the starting position of the universal PRT sequence by indicating a frequency offset from the center of an initial subcarrier.

[0099] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the indication of the starting position of the universal PRT sequence indicates the starting position of the universal PRT sequence relative to the SSB, and the SSB includes an initial RB of a common RB grid.

[0100] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, an indication of the starting position of the universal PRT sequence is carried in a broadcast message.

[0101] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, an indication of the starting position of the universal PRT sequence is carried in the SI.

[0102] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, an indication of a starting position of a universal PRT sequence is carried in an RRC message.

[0103] In a nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the subset of PRTs does not overlap with the subset of data tones, and sending the data transmission includes rate matching around the subset of PRTs.

[0104] In a twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, one or more PRTs in the subset of PRTs include data tones.

[0105] In a twenty-first aspect, alone or in combination with one or more of the first to twentieth aspects, the resource allocation is based at least in part on availability of uplink resources.

[0106] In a twenty-second aspect, alone or in combination with one or more of the first to twenty-first aspects, the plurality of PRTs corresponds to a first energy constraint and the additional plurality of PRTs corresponds to a second energy constraint.

[0107] In a twenty-third aspect, alone or in combination with one or more of the first to twenty-second aspects, the first energy constraint comprises a first maximum PRT power, and the second energy constraint comprises a second maximum PRT power.

[0108] In aspect twenty-four, alone or in combination with one or more of aspects one to twenty-three, sending the data transmission includes sending the multiple PRTs using a first PRT power no greater than the first maximum PRT power, and sending the additional multiple PRTs using a second PRT power no greater than the second maximum PRT power.

[0109] In aspect twenty-fifth, alone or in combination with one or more of aspects one to twenty-fourth, the second maximum PRT power is greater than the first maximum PRT power, and process 400 further comprises: receiving an additional resource allocation comprising an additional plurality of transmission tones, wherein the additional plurality of transmission tones comprises the additional plurality of PRTs, and the additional resource allocation is based at least in part on the availability of uplink resources, and after sending the data transmission, sending an additional data transmission using an additional waveform based at least in part on the additional resource allocation.

[0110] In the twenty-sixth aspect, either alone or in combination with one or more of the first to twenty-fifth aspects, at least a third maximum PRT power corresponding to at least one other plurality of PRTs is greater than the second maximum PRT power, and process 400 further comprises: receiving at least one other resource allocation comprising at least one other plurality of transmission tones, wherein the at least one other plurality of transmission tones comprises the at least one other plurality of PRTs, and after sending the additional data transmission, sending at least one other data transmission using at least one other waveform based at least in part on the at least one other resource allocation.

[0111] although Figure 4 An example block diagram of process 400 is shown, but in some aspects, process 400 may include Figure 4 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 400. Additionally or alternatively, two or more blocks of the process 400 may be executed in parallel.

[0112] Figure 5 is a diagram illustrating an example process 500 performed, for example, by a base station in accordance with the present disclosure. Example process 500 is an example of a base station (eg, base station 110, etc.) performing operations associated with tone reservation for PAPR reduction.

[0113] like Figure 5As shown, in some aspects, process 500 may include sending a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of PRTs in a plurality of PRTs, wherein the resource allocation indicates a location for the plurality of data tones and a location for the plurality of PRTs within a particular bandwidth, wherein the location for the plurality of PRTs is arranged relative to the location for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the particular bandwidth (block 510). For example, a base station (e.g., using transmit processor 220, controller / processor 240, memory 242, etc.) may send a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones in a plurality of data tones and a subset of PRTs in a plurality of PRTs, as described above. In some aspects, the resource allocation indicates a location for the plurality of data tones and a location for the plurality of PRTs within a particular bandwidth. In some aspects, the resource allocation indicates a location for the plurality of PRTs within a particular bandwidth. In some aspects, the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence.In some aspects, the PRT subsequence corresponds to a subband of the particular bandwidth.

[0114] like Figure 5 As further shown, in some aspects, process 500 may include receiving a data transmission including a waveform based at least in part on the resource allocation (block 520). For example, a base station (e.g., using receive processor 238, controller / processor 240, memory 242, etc.) may receive a data transmission including a waveform based at least in part on the resource allocation, as described above.

[0115] Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0116] In a first aspect, the waveform is based at least in part on an inverse discrete Fourier transform of the plurality of transmitted tones.

[0117] In a second aspect, alone or in combination with the first aspect, the waveform comprises a CP-OFDM waveform or a DFT-s-OFDM waveform.

[0118] In a third aspect, alone or in combination with one or more of the first and second aspects, the resource allocation is carried in at least one of: a DCI, an RRC message, a MAC-CE, or a combination thereof.

[0119] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the plurality of PRTs are selected such that a PAPR associated with the waveform satisfies a PAPR threshold.

[0120] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the subset of PRTs includes the entire plurality of PRTs, and the subset of data tones includes data tones less than the entire plurality of data tones.

[0121] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the resource allocation indicates the PRT subsequence by indicating a deterministic function used to determine the PRT subsequence.

[0122] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the resource allocation indicates the PRT subsequence by reference to a PRTT.

[0123] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the resource allocation indicates a set of RBs, and the PRT subsequence is at least partially based on the PRTT and the set of RBs.

[0124] In a ninth aspect, either alone or in combination with one or more of aspects one to eight, the PRTT comprises a plurality of entries, and the entries in the plurality of entries comprise at least one of: the PRT subsequence, wherein the PRT subsequence corresponds to a set of RBs, an additional PRT subsequence corresponding to an additional set of RBs, one or more parameters of a deterministic function for determining the PRT subsequence, or a combination thereof.

[0125] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, process 500 includes sending an indication of a location of the common PRT sequence relative to a set of allocated RBs.

[0126] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, process 500 includes sending an indication of a starting position of the generic PRT sequence.

[0127] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the starting position of the universal PRT sequence comprises a PRT position associated with an initial PRT of the universal PRT sequence.

[0128] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the indication of the starting position of the universal PRT sequence indicates the starting position of the universal PRT sequence relative to the center of an initial subcarrier in an initial common resource block.

[0129] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the indication of the starting position of the universal PRT sequence indicates the starting position of the universal PRT sequence by indicating a frequency offset from a center of an initial subcarrier.

[0130] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the indication of the starting position of the universal PRT sequence indicates the starting position of the PRT sequence relative to the SSB, and the SSB includes an initial RB of a common RB grid.

[0131] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, an indication of the starting position of the universal PRT sequence is carried in a broadcast message.

[0132] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, an indication of the starting position of the universal PRT sequence is carried in the SI.

[0133] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, an indication of the starting position of the universal PRT sequence is carried in an RRC message.

[0134] In a nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the subset of PRTs does not overlap with the subset of data tones, and the data transmission is rate matched based at least in part around the subset of PRTs.

[0135] In a twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, one or more PRTs in the subset of PRTs include data tones.

[0136] In a twenty-first aspect, alone or in combination with one or more of the first to twentieth aspects, the resource allocation is based at least in part on availability of uplink resources.

[0137] In a twenty-second aspect, alone or in combination with one or more of the first to twenty-first aspects, the plurality of PRTs corresponds to a first energy constraint and the additional plurality of PRTs corresponds to a second energy constraint.

[0138] In a twenty-third aspect, alone or in combination with one or more of the first to twenty-second aspects, the first energy constraint comprises a first maximum PRT power, and the second energy constraint comprises a second maximum PRT power.

[0139] In aspect twenty-four, alone or in combination with one or more of aspects one to twenty-three, receiving the data transmission includes: receiving the multiple PRTs based at least in part on a first PRT power that is not greater than the first maximum PRT power, and receiving the additional multiple PRTs based at least in part on a second PRT power that is not greater than the second maximum PRT power.

[0140] In aspect twenty-fifth, alone or in combination with one or more of aspects one to twenty-fourth, the second maximum PRT power is greater than the first maximum PRT power, and process 500 further comprises: sending an additional resource allocation comprising an additional plurality of transmission tones, wherein the additional plurality of transmission tones comprises the additional plurality of PRTs, and the additional resource allocation is based at least in part on the availability of uplink resources, and after receiving the data transmission, receiving an additional data transmission comprising an additional waveform based at least in part on the additional resource allocation.

[0141] In the twenty-sixth aspect, either alone or in combination with one or more of aspects one to twenty-fifth, at least a third maximum PRT power corresponding to at least one other plurality of PRTs is greater than the second maximum PRT power, and process 500 further comprises: sending at least one other resource allocation comprising at least one other plurality of transmission tones, wherein the at least one other plurality of transmission tones comprises the at least one other plurality of PRTs, and after receiving the additional data transmission, receiving at least one other data transmission comprising at least one other waveform based at least in part on the at least one other resource allocation.

[0142] although Figure 5 An example block diagram of process 500 is shown, but in some aspects, process 500 may include Figure 5 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 500. Additionally or alternatively, two or more blocks of the process 500 may be executed in parallel.

[0143] The following provides an overview of some aspects of the disclosure:

[0144] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones including a subset of data tones among a plurality of data tones and a subset of peak reduction tones (PRTs) among a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a specific bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, and wherein the PRT subsequence corresponds to a subband of the specific bandwidth; and sending a data transmission using a waveform based at least in part on the resource allocation.

[0145] Aspect 2: The method according to aspect 1, further comprising generating the waveform by determining an inverse discrete Fourier transform of the plurality of transmission tones.

[0146] Aspect 3: The method according to any one of aspects 1 or 2, wherein the waveform comprises a cyclic prefix orthogonal frequency division multiplexing (OFDM) waveform or a discrete Fourier transform extended OFDM waveform.

[0147] Aspect 4: The method according to any one of aspects 1-3, wherein the resource allocation is carried in at least one of: downlink control information, a radio resource control message, a medium access control control element, or a combination thereof.

[0148] Aspect 5: The method according to any one of aspects 1-4, wherein the plurality of PRTs are selected such that a peak-to-average power ratio (PAPR) associated with the waveform satisfies a PAPR threshold.

[0149] Aspect 6: The method of any of aspects 1-5, wherein the subset of PRTs includes all of the plurality of PRTs, and wherein the subset of data tones includes less than all of the plurality of data tones.

[0150] Aspect 7: The method according to any one of aspects 1-6, wherein the resource allocation indicates the PRT subsequence by indicating a deterministic function used to determine the PRT subsequence.

[0151] Aspect 8: The method according to any one of aspects 1-7, wherein the resource allocation indicates the PRT subsequence by referring to a PRT table (PRTT).

[0152] Aspect 9: The method according to aspect 8, wherein the resource allocation indicates a set of resource blocks (RBs), and the method further comprises determining the PRT subsequence based at least in part on the set of RBs using the PRTT.

[0153] Aspect 10: A method according to any one of Aspects 8 or 9, wherein the PRTT comprises a plurality of entries, wherein an entry among the plurality of entries comprises at least one of: the PRT subsequence, wherein the PRT subsequence corresponds to a set of resource blocks (RBs), an additional PRT subsequence corresponding to an additional set of RBs, one or more parameters of a deterministic function for determining the PRT subsequence, or a combination thereof.

[0154] Aspect 11: The method according to any of aspects 1-10, further comprising receiving an indication of a location of the common PRT sequence relative to a set of allocated resource blocks (RBs).

[0155] Aspect 12: The method according to any one of aspects 1-11 further comprises receiving an indication of a starting position of the universal PRT sequence.

[0156] Aspect 13: The method according to Aspect 12, wherein the starting position of the universal PRT sequence comprises a PRT position associated with an initial PRT of the universal PRT sequence.

[0157] Aspect 14: The method according to Aspect 13, wherein the indication of the starting position of the common PRT sequence indicates the starting position of the common PRT sequence relative to the center of the initial subcarrier in the initial common resource block.

[0158] Aspect 15: The method according to Aspect 14, wherein the indication of the starting position of the universal PRT sequence indicates the starting position of the universal PRT sequence by indicating a frequency offset from the center of an initial subcarrier.

[0159] Aspect 16: A method according to any one of Aspects 12-15, wherein the indication of the starting position of the universal PRT sequence indicates the starting position of the universal PRT sequence relative to a synchronization signal block (SSB), wherein the SSB includes an initial RB of a common resource block (RB) grid.

[0160] Aspect 17: The method according to any one of aspects 12-16, wherein the indication of the starting position of the universal PRT sequence is carried in a broadcast message.

[0161] Aspect 18: The method according to any one of aspects 12-17, wherein the indication of the starting position of the universal PRT sequence is carried in system information.

[0162] Aspect 19: The method according to any one of aspects 12-18, wherein the indication of the starting position of the common PRT sequence is carried in a radio resource control message.

[0163] Aspect 20: The method according to any of aspects 1-19, wherein the subset of PRTs does not overlap with the subset of data tones, and wherein sending the data transmission includes rate matching around the subset of PRTs.

[0164] Aspect 21: The method according to any of aspects 1-20, wherein one or more PRTs in the subset of PRTs include data tones.

[0165] Aspect 22: The method according to any of aspects 1-21, wherein the resource allocation is based at least in part on availability of uplink resources.

[0166] Aspect 23: The method according to any of aspects 1-22, wherein the plurality of PRTs corresponds to a first energy constraint, and wherein the additional plurality of PRTs corresponds to a second energy constraint.

[0167] Aspect 24: The method according to Aspect 23, wherein the first energy constraint comprises a first maximum PRT power, and wherein the second energy constraint comprises a second maximum PRT power.

[0168] Aspect 25: The method according to Aspect 24, wherein sending the data transmission comprises: sending the multiple PRTs using a first PRT power not greater than the first maximum PRT power; and sending the additional multiple PRTs using a second PRT power not greater than the second maximum PRT power.

[0169] Aspect 26: According to the method of Aspect 25, wherein the second maximum PRT power is greater than the first maximum PRT power, the method also includes: receiving an additional resource allocation including an additional multiple transmission tones, wherein the additional multiple transmission tones include the additional multiple PRTs, and the additional resource allocation is based at least in part on the availability of uplink resources, and after sending the data transmission, sending an additional data transmission using an additional waveform based at least in part on the additional resource allocation.

[0170] Aspect 27: A method according to Aspect 26, wherein at least a third maximum PRT power corresponding to at least one other multiple PRT is greater than the second maximum PRT power, the method further comprising: receiving at least one other resource allocation comprising at least one other multiple transmission tone, wherein the at least one other multiple transmission tone comprises the at least one other multiple PRT; and after sending the additional data transmission, sending at least one other data transmission using at least one other waveform based at least in part on the at least one other resource allocation.

[0171] Aspect 28: A method of wireless communication performed by a base station, comprising: sending a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones among a plurality of data tones and a subset of peak reduction tones (PRTs) among a plurality of PRTs, wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a specific bandwidth, wherein the positions of the plurality of PRTs are arranged according to a PRT subsequence of a general PRT sequence, relative to the positions of the plurality of data tones, and wherein the PRT subsequence corresponds to a subband of the specific bandwidth; and receiving a data transmission comprising a waveform based at least in part on the resource allocation.

[0172] Aspect 29: The method of Aspect 28, wherein the waveform is based at least in part on an inverse discrete Fourier transform of the plurality of transmitted tones.

[0173] Aspect 30: The method according to aspect 29, wherein the waveform comprises a cyclic prefix orthogonal frequency division multiplexing (OFDM) waveform or a discrete Fourier transform spread OFDM waveform.

[0174] Aspect 31: The method according to any of aspects 28-30, wherein the resource allocation is carried in at least one of: downlink control information, a radio resource control message, a medium access control control element, or a combination thereof.

[0175] Aspect 32: The method according to any of aspects 28-31, wherein the plurality of PRTs are selected such that a peak-to-average power ratio (PAPR) associated with the waveform satisfies a PAPR threshold.

[0176] Aspect 33: The method according to any of Aspects 28-32, wherein the subset of PRTs includes all of the plurality of PRTs, and wherein the subset of data tones includes data tones less than all of the plurality of data tones.

[0177] Aspect 34: The method according to any one of aspects 28-33, wherein the resource allocation indicates the PRT subsequence by indicating a deterministic function used to determine the PRT subsequence.

[0178] Aspect 35: The method according to any one of aspects 28-34, wherein the resource allocation indicates the PRT subsequence by referring to a PRT table (PRTT).

[0179] Aspect 36: The method according to Aspect 35, wherein the resource allocation indicates a set of resource blocks (RBs), and wherein the PRT subsequence is based at least in part on the PRTT and the set of RBs.

[0180] Aspect 37: A method according to any of Aspects 35 or 36, wherein the PRTT comprises a plurality of entries, wherein the entries in the plurality of entries comprise at least one of: the PRT subsequence, wherein the PRT subsequence corresponds to a set of resource blocks (RBs), an additional PRT subsequence corresponding to an additional set of RBs, one or more parameters of a deterministic function for determining the PRT subsequence, or a combination thereof.

[0181] Aspect 38: The method according to any of aspects 28-37, further comprising sending an indication of the location of the common PRT sequence relative to a set of allocated resource blocks (RBs).

[0182] Aspect 39: The method according to any one of aspects 28-38 further comprises sending an indication of the starting position of the universal PRT sequence.

[0183] Aspect 40: The method according to Aspect 39, wherein the starting position of the universal PRT sequence comprises a PRT position associated with an initial PRT of the universal PRT sequence.

[0184] Aspect 41: The method according to any one of Aspects 39 or 40, wherein the indication of the starting position of the common PRT sequence indicates the starting position of the common PRT sequence relative to the center of an initial subcarrier in an initial common resource block.

[0185] Aspect 42: The method according to Aspect 41, wherein the indication of the starting position of the universal PRT sequence indicates the starting position of the universal PRT sequence by indicating a frequency offset from a center of an initial subcarrier.

[0186] Aspect 43: A method according to any one of Aspects 39-42, wherein the indication of the starting position of the universal PRT sequence indicates the starting position of the PRT sequence relative to a synchronization signal block (SSB), wherein the SSB includes an initial RB of a common resource block (RB) grid.

[0187] Aspect 44: A method according to any one of aspects 39-43, wherein an indication of the starting position of the universal PRT sequence is carried in a broadcast message.

[0188] Aspect 45: The method according to any one of aspects 39-44, wherein the indication of the starting position of the universal PRT sequence is carried in system information.

[0189] Aspect 46: The method according to any one of aspects 39-45, wherein the indication of the starting position of the common PRT sequence is carried in a radio resource control message.

[0190] Aspect 47: The method according to any of Aspects 28-46, wherein the subset of PRTs does not overlap with the subset of data tones, and wherein the data transmission is rate matched based at least in part around the subset of PRTs.

[0191] Aspect 48: The method according to any of Aspects 28-47, wherein one or more PRTs in the subset of PRTs include data tones.

[0192] Aspect 49: The method according to any of aspects 28-48, wherein the resource allocation is based at least in part on availability of uplink resources.

[0193] Aspect 50: The method according to any of aspects 28-49, wherein the plurality of PRTs corresponds to a first energy constraint, and wherein the additional plurality of PRTs corresponds to a second energy constraint.

[0194] Aspect 51: The method according to Aspect 50, wherein the first energy constraint comprises a first maximum PRT power, and wherein the second energy constraint comprises a second maximum PRT power.

[0195] Aspect 52: A method according to Aspect 51, wherein receiving the data transmission includes: receiving the multiple PRTs based at least in part on a first PRT power that is not greater than the first maximum PRT power; and receiving the additional multiple PRTs based at least in part on a second PRT power that is not greater than the second maximum PRT power.

[0196] Aspect 53: According to the method of Aspect 52, wherein the second maximum PRT power is greater than the first maximum PRT power, the method further includes: sending an additional resource allocation comprising an additional plurality of transmission tones, wherein the additional plurality of transmission tones comprises the additional plurality of PRTs, and wherein the additional resource allocation is based at least in part on the availability of uplink resources; and after receiving the data transmission, receiving an additional data transmission, the additional data transmission comprising an additional waveform based at least in part on the additional resource allocation.

[0197] Aspect 54: A method according to Aspect 53, wherein at least a third maximum PRT power corresponding to at least one other multiple PRT is greater than the second maximum PRT power, the method further comprising: sending at least one other resource allocation comprising at least one other multiple transmission tone, wherein the at least one other multiple transmission tone comprises the at least one other multiple PRT; and after receiving the additional data transmission, receiving at least one other data transmission comprising at least one other waveform based at least in part on the at least one other resource allocation.

[0198] Aspect 55: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more aspects of aspects 1-27.

[0199] Aspect 56: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more aspects of aspects 1-27.

[0200] Aspect 57: An apparatus for wireless communication, comprising at least one component for performing a method according to one or more of aspects 1-27.

[0201] Aspect 58: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-27.

[0202] Aspect 59: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more methods of aspects 1-27.

[0203] Aspect 60: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more aspects of aspects 28-54.

[0204] Aspect 61: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more of aspects 28-54.

[0205] Aspect 62: An apparatus for wireless communication, comprising at least one component for performing the method of one or more of aspects 28-54.

[0206] Aspect 63: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of aspects 28-54.

[0207] Aspect 64: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more methods of aspects 28-54.

[0208] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the described aspects.

[0209] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other, "software" should be broadly interpreted as representing instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes and / or functions, etc. As used herein, the processor is implemented in a combination of hardware and / or hardware and software. It is obvious that the systems and / or methods described herein can be implemented in different forms of hardware and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Therefore, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes-it should be understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description of this article.

[0210] As used herein, satisfying a threshold may refer to a value that is greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0211] Although specific combinations of features are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner that is not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of different aspects includes that each dependent claim is combined with each other claim in the claim set. As used herein, the phrase "at least one of" the list of items refers to any combination of those items, including a single member. As an example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc and abc, and any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other ordering of a, b and c).

[0212] Elements, actions or instructions used herein should not be interpreted as critical or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "an" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more items quoted in combination with the article "the", and can be used interchangeably with "the one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, a combination of related items and non-related items), and can be used interchangeably with "one or more". In the case of being intended to have only one item, the phrase "only one" or similar language is used. Moreover, as used herein, the term "has, have, having" etc. is intended to be an open term. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used consecutively is intended to be inclusive and may be used interchangeably with "and / or" unless expressly stated otherwise (e.g., if used in combination with "either of" or "only one of").

Claims

1. A user equipment UE for wireless communication, comprising: Memory; as well as One or more processors, coupled to the memory, configured to: receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones from a plurality of data tones and a subset of PRTs from a plurality of peak reducing tones (PRTs), wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, wherein the general PRT sequence is a PRT sequence for an entire available bandwidth, and wherein the PRT subsequences correspond to subbands of the particular bandwidth; and A data transmission is sent using a waveform based at least in part on the resource allocation.

2. The UE of claim 1, wherein the one or more processors are further configured to generate the waveform by determining an inverse discrete Fourier transform of the plurality of transmission tones.

3. The UE according to claim 1, wherein the waveform comprises a cyclic prefix orthogonal frequency division multiplexing (OFDM) waveform or a discrete Fourier transform spread (DFT) OFDM waveform.

4. The UE of claim 1 , wherein the resource allocation is carried in at least one of: Downlink control information, Radio Resource Control messages, Media Access Control element, or Its combination. 5 . The UE of claim 1 , wherein the plurality of PRTs are selected such that a peak-to-average power ratio (PAPR) associated with the waveform satisfies a PAPR threshold.

6. The UE of claim 1, wherein the subset of PRTs includes all of the plurality of PRTs, and wherein the subset of data tones includes data tones less than all of the plurality of data tones. 7 . The UE of claim 1 , wherein the resource allocation indicates the PRT subsequence by indicating a deterministic function used to determine the PRT subsequence.

8. The UE according to claim 1, wherein the resource allocation indicates the PRT subsequence by referring to a PRT table PRTT.

9. The UE according to claim 8, wherein the resource allocation indicates a set of resource blocks (RBs), and The one or more processors are further configured to determine the PRT subsequence based at least in part on the set of RBs using the PRTT.

10. The UE of claim 8, wherein the PRTT comprises a plurality of entries, wherein an entry in the plurality of entries comprises at least one of the following: The PRT subsequence, wherein the PRT subsequence corresponds to a set of resource blocks RB, Additional PRT subsequences corresponding to additional sets of RBs, one or more parameters of a deterministic function for determining said PRT subsequence, or Its combination.

11. The UE of claim 1, wherein the one or more processors are further configured to receive an indication of a location of the common PRT sequence relative to a set of allocated resource blocks (RBs).

12. The UE of claim 1, wherein the one or more processors are further configured to receive an indication of a starting position of the general PRT sequence. 13 . The UE of claim 12 , wherein the starting position of the universal PRT sequence comprises a PRT position associated with an initial PRT of the universal PRT sequence.

14. The UE of claim 13, wherein the indication of the starting position of the common PRT sequence indicates the starting position of the common PRT sequence relative to a center of an initial subcarrier in an initial common resource block. 15 . The UE of claim 14 , wherein the indication of the starting position of the common PRT sequence indicates the starting position of the common PRT sequence by indicating a frequency offset from the center of the initial subcarrier.

16. The UE of claim 12, wherein the indication of the starting position of the universal PRT sequence indicates the starting position of the universal PRT sequence relative to a synchronization signal block (SSB), wherein the SSB comprises an initial RB of a common resource block (RB) grid.

17. The UE of claim 12, wherein the indication of the starting position of the common PRT sequence is carried in a broadcast message.

18. The UE of claim 12, wherein the indication of the starting position of the common PRT sequence is carried in system information.

19. The UE of claim 12, wherein the indication of the starting position of the common PRT sequence is carried in a radio resource control message.

20. The UE of claim 1, wherein the subset of PRTs does not overlap with the subset of data tones, and Wherein to send the data transmission, the one or more processors are configured to perform rate matching around the subset of PRTs.

21. The UE of claim 1, wherein one or more PRTs in the subset of PRTs include data tones.

22. The UE of claim 1, wherein the resource allocation is based at least in part on availability of uplink resources.

23. The UE of claim 1, wherein the plurality of PRTs corresponds to a first energy constraint, and wherein the additional plurality of PRTs corresponds to a second energy constraint.

24. The UE of claim 23, wherein the first energy constraint comprises a first maximum PRT power, and wherein the second energy constraint comprises a second maximum PRT power.

25. The UE of claim 24, wherein to send the data transmission, the one or more processors are configured to: transmitting the plurality of PRTs using a first PRT power no greater than the first maximum PRT power; and The additional plurality of PRTs are transmitted using a second PRT power that is no greater than the second maximum PRT power.

26. The UE of claim 25, wherein the second maximum PRT power is greater than the first maximum PRT power, and the one or more processors are further configured to: receiving an additional resource allocation comprising an additional plurality of transmission tones, wherein the additional plurality of transmission tones comprises the additional plurality of PRTs, and wherein the additional resource allocation is based at least in part on availability of uplink resources; and After sending the data transmission, an additional data transmission is sent using an additional waveform based at least in part on the additional resource allocation.

27. The UE of claim 26, wherein at least a third maximum PRT power corresponding to at least one other plurality of PRTs is greater than the second maximum PRT power, and the one or more processors are further configured to: receiving at least one other resource allocation comprising at least one other plurality of transmission tones, wherein the at least one other plurality of transmission tones comprises the at least one other plurality of PRTs; and After sending the additional data transmission, at least one other data transmission is sent using at least one other waveform based at least in part on the at least one other resource allocation.

28. A base station for wireless communication, comprising: Memory; as well as One or more processors, coupled to the memory, configured to: transmitting a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones from a plurality of data tones and a subset of PRTs from a plurality of peak reducing tones (PRTs), wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, wherein the general PRT sequence is a PRT sequence for an entire available bandwidth, and wherein the PRT subsequences correspond to subbands of the particular bandwidth; and A data transmission is received including a waveform based at least in part on the resource allocation.

29. A method of wireless communication performed by a user equipment UE, comprising: receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones from a plurality of data tones and a subset of PRTs from a plurality of peak reducing tones (PRTs), wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, wherein the general PRT sequence is a PRT sequence for an entire available bandwidth, and wherein the PRT subsequences correspond to subbands of the particular bandwidth; and A data transmission is sent using a waveform based at least in part on the resource allocation.

30. A method of wireless communication performed by a base station, comprising: transmitting a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones from a plurality of data tones and a subset of PRTs from a plurality of peak reducing tones (PRTs), wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, wherein the general PRT sequence is a PRT sequence for an entire available bandwidth, and wherein the PRT subsequences correspond to subbands of the particular bandwidth; and A data transmission is received including a waveform based at least in part on the resource allocation.

31. An apparatus for performing wireless communication at a user equipment (UE), the apparatus comprising: means for receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones from a plurality of data tones and a subset of PRTs from a plurality of peak reducing tones (PRTs), wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, wherein the general PRT sequence is a PRT sequence for an entire available bandwidth, and wherein the PRT subsequences correspond to subbands of the particular bandwidth; and Means for sending a data transmission using a waveform based at least in part on the resource allocation.

32. An apparatus for performing wireless communication at a base station, the apparatus comprising: means for transmitting a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones from a plurality of data tones and a subset of PRTs from a plurality of peak reducing tones (PRTs), wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, wherein the general PRT sequence is a PRT sequence for an entire available bandwidth, and wherein the PRT subsequences correspond to subbands of the particular bandwidth; and Means for receiving a data transmission comprising a waveform based at least in part on the resource allocation.

33. A computer readable medium having program code stored thereon, wherein: The program code may be executed by one or more processors of the user equipment UE, so that the one or more processors: receiving a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones from a plurality of data tones and a subset of PRTs from a plurality of peak reducing tones (PRTs), wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, wherein the general PRT sequence is a PRT sequence for an entire available bandwidth, and wherein the PRT subsequences correspond to subbands of the particular bandwidth; and A data transmission is sent using a waveform based at least in part on the resource allocation.

34. A computer readable medium having program code stored thereon, wherein: The program code may be executed by one or more processors of the base station so that the one or more processors: transmitting a resource allocation indicating a plurality of transmission tones, the plurality of transmission tones comprising a subset of data tones from a plurality of data tones and a subset of PRTs from a plurality of peak reducing tones (PRTs), wherein the resource allocation indicates positions for the plurality of data tones and positions for the plurality of PRTs within a particular bandwidth, wherein the positions for the plurality of PRTs are arranged relative to the positions for the plurality of data tones according to a PRT subsequence of a general PRT sequence, wherein the general PRT sequence is a PRT sequence for an entire available bandwidth, and wherein the PRT subsequences correspond to subbands of the particular bandwidth; and A data transmission is received including a waveform based at least in part on the resource allocation.

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