Rate matching for channel awareness tone reservation

Abstract

The first wireless device outputs to the second wireless device a first indication of a TR location set associated with the communication channel, wherein the TR location set is selected based on an estimate of the associated communication channel. The first indication of the set of TR positions includes at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR. The network entity outputs a communication for the second wireless device based on the first indication of the TR location set, the communication comprising a first set of data tones and a second set of reserved tones in the same symbol.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to U.S. Provisional Application Serial No. 63 / 399,714, filed on August 21, 2022, entitled “Techniques to Facilitate RateMatching for Channel Aware Tone Reservation,” and U.S. Non-Provisional Patent Application Serial No. 18 / 446,423, filed on August 8, 2023, entitled “RateMatching for Channel Aware Tone Reservation,” the entire contents of which are expressly incorporated herein by reference. Technical Field

[0003] The present disclosure relates generally to communication systems, and more particularly to wireless communications employing peak-to-average power ratio (PAPR) reduction. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, or even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continued mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Certain aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0006] A simplified summary of one or more aspects is presented below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all contemplated aspects. This summary is neither intended to identify key or important elements of all aspects nor to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description presented later.

[0007] In one aspect of the present disclosure, a method for wireless communication at a network entity is provided. The method includes: selecting a tone reservation (TR) position set associated with a downlink channel, the TR position set selected based on an estimate of an uplink channel; outputting a first indication of the TR position set associated with the downlink channel to a user equipment (UE), the first indication of the TR position set comprising at least one of a subcarrier bitmap, a subcarrier resource indicator value (RIV), or a channel state information (CSI) reference signal for TR; and outputting a communication of a first data tone set and a second reserved tone set included in the same symbol to the UE based on the first indication of the TR position set.

[0008] In one aspect of the present disclosure, a computer-readable storage medium storing computer-executable code for wireless communication at a network entity is provided. The code, when executed by a processor, causes the processor to: select a TR position set associated with a downlink channel, the TR position set selected based on an estimate of an uplink channel; output a first indication of the TR position set associated with the downlink channel to a UE, the first indication of the TR position set comprising at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and output to the UE, based on the first indication of the TR position set, a communication of a first data tone set and a second reserved tone set included in the same symbol.

[0009] In one aspect of the present disclosure, an apparatus for wireless communication at a network entity is provided. The apparatus includes: a component for selecting a TR position set associated with a downlink channel, the TR position set selected based on an estimate of an uplink channel; a component for outputting a first indication of the TR position set associated with the downlink channel to a UE, the first indication of the TR position set comprising at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and a component for outputting to the UE, based on the first indication of the TR position set, a communication of a first data tone set and a second reserved tone set included in the same symbol.

[0010] In one aspect of the present disclosure, a device for wireless communication at a network entity is provided. The device includes: a memory; and at least one processor, the at least one processor coupled to the memory and configured to: select a TR position set associated with a downlink channel, the TR position set selected based on an estimate of an uplink channel; output a first indication of the TR position set associated with the downlink channel to a UE, the first indication of the TR position set including at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and output to the UE, based on the first indication of the TR position set, a communication of a first data tone set and a second reserved tone set included in the same symbol.

[0011] In one aspect of the present disclosure, a method for wireless communication at a UE is provided. The method includes: receiving a first indication of a TR position set associated with a downlink channel from a network entity, the first indication of the TR position set including at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; receiving a communication including one or more data tones and one or more reserved tones in the same symbol; and decoding the communication based on the TR position set.

[0012] In one aspect of the present disclosure, a computer-readable storage medium storing computer-executable code for wireless communication at a UE is provided. The code, when executed by a processor, causes the processor to receive a first indication of a TR position set associated with a downlink channel from a network entity, the first indication of the TR position set including at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; receive a communication including one or more data tones and one or more reserved tones in the same symbol; and decode the communication based on the TR position set.

[0013] In one aspect of the present disclosure, an apparatus for wireless communication at a UE is provided. The apparatus includes a component for receiving a first indication of a TR position set associated with a downlink channel from a network entity, the first indication of the TR position set including at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; a component for receiving a communication including one or more data tones and one or more reserved tones in the same symbol; and a component for decoding the communication based on the TR position set.

[0014] In one aspect of the present disclosure, a device for wireless communication at a UE is provided. The device includes: a memory; and at least one processor, the at least one processor is coupled to the memory and is configured to: receive a first indication of a TR position set associated with a downlink channel from a network entity, the first indication of the TR position set including at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; receive a communication including one or more data tones and one or more reserved tones in the same symbol; and decode the communication based on the TR position set.

[0015] In one aspect of the present disclosure, a method, apparatus, and computer-readable medium for wireless communication at a first wireless device are provided. The apparatus outputs a first indication of a set of TR positions associated with a communication channel to a second wireless device. The set of TR positions is selected based on an estimate of the associated communication channel. The first indication of the set of TR positions includes at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI reference signal for TR. The apparatus outputs a communication for the second wireless device based on the first indication of the set of TR positions, the communication including a first set of data tones and a second set of reserved tones in the same symbol.

[0016] In one aspect of the present disclosure, a method, apparatus, and computer-readable medium for wireless communication at a second wireless device are provided. The apparatus receives a first indication of a set of TR positions associated with a communication channel from a first wireless device. The first indication of the set of TR positions includes at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI reference signal for TR. The apparatus receives a communication including one or more data tones and one or more reserved tones in the same symbol and decodes the communication based on the set of TR positions.

[0017] To achieve the aforementioned and related purposes, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain exemplary features of one or more aspects. However, these features are only indicative of only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0019] Figure 2 A diagram illustrating an example decomposed base station architecture is shown.

[0020] Figure 3A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0021] Figure 3B is a diagram illustrating an example of downlink (DL) channels within a subframe according to various aspects of the present disclosure.

[0022] Figure 3C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0023] Figure 3D is a diagram illustrating an example of uplink (UL) channels within a subframe according to various aspects of the present disclosure.

[0024] Figure 4 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0025] Figure 5 is a diagram illustrating an example allocation of reserved tones and data tones in accordance with various aspects of the present disclosure.

[0026] Figure 6 is a diagram illustrating an example of a time-domain data signal according to various aspects of the present disclosure.

[0027] Figure 7 is a diagram illustrating an example in which a transmitting device according to various aspects of the present disclosure allocates a reserved tone based on a signal-to-noise ratio of a channel.

[0028] Figure 8 is a diagram illustrating an example of channel aware tone reservation according to various aspects of the present disclosure.

[0029] Fig. 9 An example communication flow between a network entity and a UE according to various aspects of the present disclosure is illustrated.

[0030] Fig.10 is a diagram illustrating an example of a physical resource block (PRB)-symbol rate matching pattern according to various aspects of the present disclosure.

[0031] Fig.11 Depicted is an example pseudo code for facilitating a PRB-symbol rate matching mode in accordance with various aspects of the present disclosure.

[0032] Fig.12 is a diagram illustrating an example mapping of channel state information (CSI) reference signals (CSI-RS) to physical resources according to various aspects of the present disclosure.

[0033] Fig.13 is a flow chart of a method of wireless communication at a UE in accordance with various aspects presented herein.

[0034] Fig.14is a diagram illustrating an example of a hardware implementation for an example apparatus and / or UE in accordance with various aspects presented herein.

[0035] Fig.15 is a flow chart of a method of wireless communication at a network entity in accordance with various aspects presented herein.

[0036] Fig.16 is a diagram illustrating an example of a hardware implementation for an example network entity in accordance with various aspects presented herein. DETAILED DESCRIPTION

[0037] Various aspects disclosed herein provide techniques for indicating tone reservation (TR) locations to improve the efficiency of PAPR. Tone reservation is a technique for reducing the PAPR at a transmitting device (such as a network entity). For example, when tone reservation is employed, a transmitting device may replace certain data tones transmitted with reserved tones. Inserting the reserved tones may result in some data loss, but may also reduce the amount of power associated with the transmission.

[0038] In some aspects, the transmitting device may use existing signaling between the transmitting device and the receiving device to indicate the location of the reserved tone. For example, the transmitting device may use zero power (ZP) CSI-RS (ZP-CSI-RS) to indicate the location of the reserved tone in the communication. In some examples, the transmitting device may indicate the location of the reserved tone that is configured not to allocate the reserved tone on the PRB containing certain subcarriers. In some examples, the transmitting device may indicate the location of the reserved tone via a PRB-symbol bitmap rate matching pattern.

[0039] The receiving device can use the indication of the position of the reserved tone to facilitate decoding the communication received from the transmitting device. For example, the receiving device can determine the position of the reserved tone and then perform rate matching around the determined position. The use of the reserved tone presented herein achieves a reduction in PAPR and can help provide power savings. Wireless communication performance can be improved by selecting the tone based on the channel conditions. Since the tone may change due to changing channel conditions, the present disclosure provides various aspects that enable the receiver to identify the selected tone and perform rate matching around the selected tone. Although some examples are described for a base station as a transmitter and a UE as a receiver, these aspects can be similarly applied to the reserved tones in uplink communication or sidelink communication.

[0040] The detailed description set forth below in conjunction with the accompanying drawings is a description of various configurations and does not represent the only configurations with which the concepts described herein can be practiced. In order to provide a thorough understanding of the various concepts, the specific embodiments include specific details. However, these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0041] Several aspects of telecommunication systems are also presented with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any 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.

[0042] As an example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system", which includes one or more processors. When multiple processors are implemented, the multiple processors can perform functions individually or in combination. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic components, discrete hardware circuits, and other suitable hardware configured to perform various functions described throughout the present disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination thereof.

[0043] Thus, in one or more example aspects, specific implementations and / or use cases, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. By way of example, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0044] Although various aspects, specific implementations and / or use cases are described in this application by the illustration of some examples, additional or different aspects, specific implementations and use cases may be generated in many different arrangements and scenarios. The various aspects, specific implementations and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes and packaging arrangements. For example, various aspects, specific implementations and / or use cases can be generated via integrated chip specific implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / purchase equipment, medical equipment, artificial intelligence (AI) enabled devices, etc.). Although some examples may or may not be specifically for use cases or applications, the examples described may have wide applicability. Various aspects, specific implementations and / or use cases can be implemented from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to the range of aggregated, distributed or original equipment manufacturer (OEM) devices or systems in combination with one or more technologies herein. In some practical environments, the equipment combined with the various aspects and features described may also include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). The various techniques described herein can be practiced in a wide variety of devices of various sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc.

[0045] The deployment of a communication system (such as a 5G NR system) can be arranged in a variety of ways using various components or constituent parts. In a 5G NR system or network (NW), a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or network equipment (such as a base station (BS)), or one or more units (or one or more components) that perform base station functionality can be implemented in an aggregated or decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0046] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0047] Base station operation or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as that initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0048] Figure 1 1 is a diagram illustrating an example of a wireless communication system and an access network 100. The wireless communication system (which is also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (e.g., EPC 160), and another core network 190 (e.g., 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0049] The base station 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a first backhaul link 132 (e.g., S1 interface). The base station 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) can interface with the core network 190 via a second backhaul link 184. Among other functions, the base station 102 can perform one or more of the following functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations 102 may communicate with each other directly or indirectly (eg, via the EPC 160 or the core network 190) via the third backhaul link 134 (eg, an X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless.

[0050] In some aspects, a base station (e.g., one of base stations 102 or one of base stations 180) may be referred to as a RAN and may include aggregated components or disaggregated components. As an example of a disaggregated RAN, a base station may include a central unit (CU) (e.g., CU 106), one or more distributed units (DUs) (e.g., DU 105), and / or one or more remote units (RUs) (e.g., RU 109), such as Figure 1 As illustrated. The RAN may be decomposed using a split between the RU 109 and the aggregated CU / DU. The RAN may be decomposed using a split between the CU 106, DU 105, and RU 109. The RAN may be decomposed using a split between the CU 106 and the aggregated DU / RU. The CU 106 and one or more DUs may be connected via an F1 interface. The DU 105 and the RU 109 may be connected via a fronthaul interface. The connection between the CU 106 and the DU 105 may be referred to as midhaul, and the connection between the DU 105 and the RU 109 may be referred to as fronthaul. The connection between the CU 106 and the core network 190 may be referred to as backhaul.

[0051] The RAN may be based on a functional split between various components of the RAN (e.g., between the CU 106, DU 105, or RU 109). The CU 106 may be configured to perform one or more aspects of a wireless communication protocol, for example, one or more layers of a protocol stack, and one or more DUs may be configured to handle other aspects of the wireless communication protocol, for example, other layers of the protocol stack. In different implementations, the split between the layers handled by the CU and the layers handled by the DU may occur at different layers of the protocol stack. As a non-limiting example, the DU 105 may provide a logical node for hosting at least a portion of a radio link control (RLC) layer, a medium access control (MAC) layer, and a physical (PHY) layer based on the functional split. The RU may provide a logical node configured to host at least a portion of the PHY layer and radio frequency (RF) processing. The CU 106 may host, for example, higher layer functions above the RLC layer, such as a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, and / or an upper layer. In other implementations, the split between the layer functions provided by the CU, DU, or RU may be different.

[0052] Base station 102 can communicate wirelessly with UE 104. Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas. For example, a small cell 102' may have a coverage area 110' that overlaps with a corresponding geographic coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between base station 102 and UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from UE 104 to base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from base station 102 to UE 104. The communication link 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link may be through one or more carriers. For each carrier allocated in the carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 can use spectrum with a bandwidth of up to Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.). The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​compared to UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0053] Some UEs 104 may communicate with each other using device-to-device (D2D) communication links, such as D2D communication link 158. D2D communication link 158 may use DL / UL WWAN spectrum. D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be performed via various wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, and the like. TM (Bluetooth is a trademark of the Bluetooth Special Interest Group (SIG)), Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard TM (Wi-Fi is a trademark of the Wi-Fi Alliance), LTE or NR.

[0054] The wireless communication system may also include a Wi-Fi access point (AP), such as AP 150, that communicates with a Wi-Fi station (STA), such as STA 152, via a communication link 154, e.g., in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether a channel is available.

[0055] The small cell 102' may operate in licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may improve the coverage of the access network and / or increase the capacity of the access network.

[0056] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "sub-6 GHz" band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0057] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125GHz-24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and therefore the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, currently exploring higher frequency bands to extend 5G NR operation to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6GHz-71GHz), FR4 (71GHz-114.25GHz) and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0058] In view of the above, unless otherwise specifically stated, if the term "below 6 GHz" or the like is used in this document, it may broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specifically stated, if the term "millimeter wave" or the like is used in this document, it may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2, and / or FR5, or may be within the EHF band.

[0059] The base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), may include and / or be referred to as an eNB, a gNodeB (gNB), or another type of base station. Some base stations, such as gNBs, may operate in conventional sub-6 GHz spectrum, in millimeter wave frequencies, and / or near millimeter wave frequencies to communicate with the UE 104. When the gNB operates in millimeter wave or near millimeter wave frequencies, the base station 180 may be referred to as a millimeter wave base station. The millimeter wave base station may utilize beamforming 182 with the UE 104 to compensate for path loss and short range. The base station 180 and the UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming.

[0060] Base station 180 may send beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182". UE 104 may also send beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or different. The transmit direction and receive direction of UE 104 may be the same or different.

[0061] The EPC 160 may include a mobility management entity (e.g., MME 162), other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway (e.g., PDN gateway 172). The MME 162 may communicate with a home subscriber server (HSS) (e.g., HSS 174). The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are passed through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to the IP service 176. The IP service 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service configuration and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS delivery, may be used to authorize and initiate MBMS bearer services in a public land mobile network (PLMN), and may be used to schedule MBMS delivery. The MBMS gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS-related billing information.

[0062] The core network 190 may include an access and mobility management function (AMF) (e.g., AMF 192), other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) (e.g., UPF 195). AMF 192 may communicate with a unified data management (UDM) 196. AMF 192 is a control node that handles signaling between UE 104 and the core network 190. Generally speaking, AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are passed through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 is connected to IP services 197. IP services 197 may include the Internet, intranet, IP multimedia subsystem (IMS), packet switching (PS) streaming (PSS) services, and / or other IP services.

[0063] Base stations may include and / or be referred to as gNBs, Node Bs, eNBs, access points, base transceivers, radio base stations, radio transceivers, transceiver functions, basic service sets (BSSs), extended service sets (ESSs), transmit receive points (TRPs), or some other suitable terminology. Base stations 102 provide access points to EPC 160 or core network 190 for UEs 104. Examples of UEs 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablets, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional devices. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term. In some scenarios, the term UE may also be applied to one or more supporting devices, such as in a device constellation arrangement. One or more of these devices may access a network together and / or individually.

[0064] Reference again Figure 1In some aspects, a second wireless device (such as UE 104) may include a TR component 198 configured to receive a first indication of a set of TR positions associated with a communication channel from a network entity. The set of TR positions may be selected based on an estimate of the associated channel. The first indication of the set of TR positions may include at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR. The TR component 199 may be configured to: receive a communication including one or more data tones and one or more reserved tones in the same symbol; and decode the communication based on the set of TR positions. In some aspects, a first wireless device (such as base station 180 or a component of a base station) may include a TR component 199 configured to select a set of TR positions associated with a communication channel, the set of TR positions selected based on an estimate of the associated communication channel. TR component 199 may be configured to: output a first indication of a set of TR positions associated with a communication channel to a second wireless device, the first indication of the set of TR positions including at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and output a communication of a first data tone set and a second reserved tone set included in the same symbol to the second wireless device based on the first indication of the set of TR positions. Although example aspects may be described for communications from a base station to a UE to illustrate the concepts, these aspects may also be applied to tone reservation for uplink communications and / or sidelink communications. For example, a UE may include TR component 198 and / or TR component 199. Similarly, a base station or one or more components of a base station (such as a CU, DU, and / or DU) may include TR component 199 and / or TR component 198.

[0065] Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, 6G, and other wireless technologies.

[0066] The deployment of a communication system (such as a 5G NR system) can be arranged in a variety of ways using various components or constituent parts. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or network equipment (such as a base station (BS)), or one or more units (or one or more components) performing base station functionality can be implemented in an aggregated or decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0067] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0068] Base station operation or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as that initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0069] The deployment of a communication system such as a 5G New Radio (NR) system may be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or network equipment such as a base station (BS), or one or more units (or one or more components) performing base station functionality may be implemented in an aggregated or decomposed architecture. For example, a BS such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP), or a cell, etc. may be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0070] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may also be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0071] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configurations such as those initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0072] Figure 2 A diagram illustrating an example decomposed base station 200 architecture is shown. The decomposed base station 200 architecture may include one or more CUs 210, which may communicate directly with the core network 220 via a backhaul link, or indirectly communicate with the core network 220 through one or more decomposed base station units (such as a near real-time (near RT) RAN intelligent controller (RIC) (e.g., near RT RIC 225) via an E2 link, or a non-real-time (non-RT) RIC (e.g., non-RT RIC 215) associated with a service management and orchestration (SMO) framework (e.g., SMO framework 205), or both). The CUs in the one or more CUs 210 may communicate with one or more DUs 230 via corresponding midhaul links such as F1 interfaces. The one or more DUs 230 may communicate with one or more RUs 240 via corresponding fronthaul links. The one or more RUs 240 may communicate with corresponding UEs via one or more radio frequency (RF) access links. In some specific implementations, a UE may be served by multiple RUs at the same time.

[0073] Each of the units (i.e., one or more CUs 210, one or more DUs 230, one or more RUs 240, and near-RTRICs 225, non-RT RICs 215, and SMO frameworks 205) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to the communication interfaces of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, the unit may include a wired interface configured to receive or send signals to one or more of the other units on a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, a transmitter, or a transceiver (such as a radio frequency (RF) transceiver) configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0074] In some aspects, one or more CUs 210 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by one or more CUs 210. The CU may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, the CU may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, the CU may be implemented to communicate with the DU for network control and signal notification.

[0075] One or more DUs 230 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 240. In some aspects, one or more DUs 230 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) depending at least in part on functional splits such as those defined by the Third Generation Partnership Project (3GPP). In some aspects, one or more DUs 230 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by one or more DUs 230 or with control functions hosted by one or more CUs 210.

[0076] Lower layer functionality may be implemented by one or more RUs 240. In some deployments, a RU controlled by a DU may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.) or both based at least in part on functional splitting such as lower layer functional splitting. In such an architecture, one or more RUs 240 may be implemented to handle over-the-air (OTA) communications with one or more UEs 204. In some specific implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU may be controlled by the corresponding DU. In some scenarios, this configuration may enable one or more DUs 230 and one or more CUs 210 to be implemented in a cloud-based RAN architecture such as a vRAN architecture.

[0077] The SMO framework 205 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 205 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 205 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 290) to perform network element lifecycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, one or more CUs 210, one or more DUs 230, one or more RUs 240, and near-RT RICs 225. In some specific implementations, the SMO framework 205 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 211) via the O1 interface. Additionally, in some specific implementations, the SMO framework 205 may communicate directly with one or more RUs 240 via the O1 interface. The SMO framework 205 may also include a non-RT RIC 215 configured to support the functionality of the SMO framework 205 .

[0078] The non-RT RIC 215 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 225. The non-RT RIC 215 may be coupled to or in communication with the near-RT RIC 225 (such as via an A1 interface). The near-RT RIC 225 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 210, one or more DUs 230, or both, and the O-eNB with the near-RT RIC 225.

[0079] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 225, the non-RT RIC 215 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 225 and may be received from a non-network data source or from a network function at the SMO framework 205 or the non-RT RIC 215. In some examples, the non-RT RIC 215 or the near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 215 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 205 (such as via reconfiguration of O1) or via creation of RAN management policies (such as A1 policies).

[0080] As combined Figure 1 The second wireless device, which may correspond to UE 204 or a network component (such as CU 210, DU 230 and / or RU 240), may include a TR component 198, which is configured to: receive a first indication of a TR position set associated with a communication channel from a network entity, the first indication of the TR position set including at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; receive a communication including one or more data tones and one or more reserved tones in the same symbol; and decode the communication based on the TR position set. In some aspects, a first wireless device (such as a base station 180, a component of a base station, or a UE) may include a TR component 199 configured to: select a TR position set associated with a communication channel, the TR position set selected based on an estimate of the associated channel; output a first indication of the TR position set associated with the downlink channel to a second wireless device, the first indication of the TR position set including at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and output communications including a first data tone set and a second reserved tone set in the same symbol to the second wireless device based on the first indication of the TR position set.

[0081] Figure 3A FIG300 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 3B is a diagram 330 illustrating an example of DL channels within a 5G NR subframe. Figure 3C FIG350 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 3DFIG380 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or may be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 3A , Figure 3C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (most of which are DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with slot format 1 (all of which are UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are both DL and both UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. The slot format is configured for the UE via a received slot format indicator (SFI) (dynamically configured via DL control information (DCI) or semi-statically / statically configured via radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0082] FIG. 3A to FIG. 3D The frame structure is illustrated, and various aspects of the present disclosure may be applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 subframes of the same size (1ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4 or 2 symbols. Each time slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For a normal CP, each time slot may include 14 symbols, and for an extended CP, each time slot may include 12 symbols. The symbol on the DL may be a CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) extended OFDM (DFT-s-OFDM) symbol (for power-limited scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the CP and the parameter set. The parameter set defines the subcarrier spacing (SCS) (see Table 1). Symbol length / duration can be scaled with 1 / SCS.

[0083]

[0084] Table 1: Parameter set, SCS and CP

[0085] For normal CP (14 symbols / slot), different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, parameter set 2 allows 4 slots per subframe. Accordingly, for normal CP and parameter set μ, there are 14 symbols / slot and 2 μ time slots / subframe. As shown in Table 1, the subcarrier spacing may be equal to 2μ*15kHz, where μ is a parameter set 0 to 4. Thus, the subcarrier spacing for parameter set μ=0 is 15kHz, and the subcarrier spacing for parameter set μ=4 is 240kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIG. 3A to FIG. 3D An example of a parameter set μ=2 with a normal CP of 14 symbols per slot and 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is about 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 3B ). Each BWP may have a specific parameter set and CP (normal or extended).

[0086] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a plurality of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0087] like Figure 3A As illustrated, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) (indicated as R for a particular configuration, but other DM-RS configurations are possible) (e.g., PDSCH DM-RS) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0088] Figure 3BExamples of various DL channels within a subframe of a frame are illustrated. A physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six RE groups (REGs), each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring opportunity on a CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies on the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the system frame number (SFN) and the number of RBs in the system bandwidth. The physical downlink shared channel (PDSCH) carries user data, broadcast system information such as system information blocks (SIBs) that are not sent over the PBCH, and paging messages. The PDSCH may include DM-RS, for example, as combined with Figure 3A as described in the examples.

[0089] like Figure 3C As illustrated, some of the REs carry DM-RS (indicated as R for a particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may send a DM-RS for a physical uplink control channel (PUCCH) and a DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first or first two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, the PUCCH DM-RS may be sent in different configurations. The UE may send a sounding reference signal (SRS). The SRS may be sent in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the teeth of the comb. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0090] Figure 3D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0091] Figure 4 is a block diagram illustrating an example of a first wireless device configured to exchange wireless communications with a second wireless device. Figure 4 In the illustrated example of , the first wireless device may include a base station 410, the second wireless device may include a UE 450, and the base station 410 may communicate with the UE 450 in an access network. Figure 4 As shown, base station 410 includes a transmit processor (TX processor 416), a transmitter 418Tx, a receiver 418Rx, an antenna 420, a receive processor (RX processor 470), a channel estimator 474, a controller / processor 475, and a memory 476. Example UE 450 includes antenna 452, a transmitter 454Tx, a receiver 454Rx, an RX processor 456, a channel estimator 458, a controller / processor 459, a memory 460, and a TX processor 468. In other examples, base station 410 and / or UE 450 may include additional or alternative components.

[0092] In the DL, Internet Protocol (IP) packets may be provided to the controller / processor 475. The controller / processor 475 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 475 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0093] The TX processor 416 and the RX processor 470 implement layer 1 functionality associated with various signal processing functionalities. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transport channel, forward error correction (FEC) coding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 416 processes the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-order phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols can then be divided into parallel streams. Subsequently, each stream can be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from channel estimator 474 may be used to determine coding and modulation schemes and for spatial processing. Channel estimates may be derived based on reference signals and / or channel condition feedback sent by UE 450. Each spatial stream may then be provided to a different one of antennas 420 via a separate transmitter (e.g., transmitter 418Tx). Each transmitter 418Tx may modulate a radio frequency (RF) carrier with a corresponding spatial stream for transmission.

[0094] At the UE 450, each receiver 454Rx receives a signal through its corresponding antenna in the antenna 452. Each receiver 454Rx recovers the information modulated onto the RF carrier and provides the information to the RX processor 456. The TX processor 468 and the RX processor 456 implement layer 1 functionality associated with various signal processing functionalities. The RX processor 456 can perform spatial processing on the information to recover any spatial stream to the UE 450. In the case where multiple spatial streams are to the UE 450, two or more of the multiple spatial streams can be combined into a single OFDM symbol stream by the RX processor 456. The RX processor 456 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbol on each subcarrier and the reference signal are recovered and demodulated by determining the most likely signal constellation point sent by the base station 410. These soft decisions can be based on the channel estimate calculated by the channel estimator 458. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by base station 410. The data and control signals are then provided to controller / processor 459, which implements layer 3 and layer 2 functionality.

[0095] The controller / processor 459 may be associated with a memory 460 that stores program codes and data. The memory 460 may be referred to as a computer readable medium. In the UL, the controller / processor 459 provides demultiplexing between transmit channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets. The controller / processor 459 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0096] Similar to the functionality described in conjunction with DL transmissions performed by the base station 410, the controller / processor 459 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0097] Channel estimates derived by the channel estimator 458 from a reference signal or feedback sent by the base station 410 may be used by the TX processor 468 to select the appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the TX processor 468 may be provided to different ones of the antennas 452 via separate transmitters (e.g., transmitter 454Tx). Each transmitter 454Tx may modulate an RF carrier with a corresponding spatial stream for transmission.

[0098] UL transmissions are processed at the base station 410 in a manner similar to that described in connection with the receiver functionality at the UE 450. Each receiver 418Rx receives a signal through its corresponding one of the antennas 420. Each receiver 418Rx recovers information modulated onto an RF carrier and provides the information to the RX processor 470.

[0099] The controller / processor 475 may be associated with a memory 476 that stores program codes and data. The memory 476 may be referred to as a computer readable medium. In the UL, the controller / processor 475 provides demultiplexing between transmit channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets. The controller / processor 475 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0100] At least one of the TX processor 468, the RX processor 456, and the controller / processor 459 may be configured to perform operations related to Figure 1 and / or Figure 2 The TR components 198 or 199 combine various aspects.

[0101] At least one of the TX processor 416, the RX processor 470, and the controller / processor 475 may be configured to perform operations related to Figure 1 and / or Figure 2 The TR components 198 or 199 combine various aspects.

[0102] A power amplifier is a device that can be used to increase the amplitude (e.g., voltage, current, power, etc.) of an input signal. A power amplifier can take an input signal or waveform, apply power to the input signal, and output an output signal that is similar to the input signal but has a stronger waveform than the input signal. The design and specific implementation of a power amplifier in wireless communications can help a signal sent by a transmitting device become strong enough to reach a receiving device (e.g., be received by a receiving device).

[0103] Since a power amplifier may consume additional power to amplify an input signal, a goal in designing a power amplifier would be to have a linear relationship between the input signal and the output signal. For a power amplifier with linear behavior, the power of the output signal may be proportional to the power of the input signal. For example, if an input signal power of 10 milliwatts (mW) corresponds to an output signal power of 15 mW, an input signal power of 20 mW may correspond to an output signal power of 30 mW, and so on.

[0104] However, the power amplifier may approximately follow linear behavior for a limited range of input signals, and may have nonlinear behavior outside the range of the input signal. Due to physical constraints, the output signal power of the power amplifier may not increase indefinitely, so at certain points (e.g., at the saturation point), an increase in the input signal power of the power amplifier may not produce a discernible increase in the output signal power. Therefore, the power amplifier may begin to follow nonlinear behavior. Additionally, when the power amplifier is operating at a higher input signal power, the nonlinear behavior may become particularly significant. For example, when the power amplifier is saturated (e.g., across the saturation point), the output signal power may no longer be proportional to the input signal power, where a substantial increase in the input signal power exceeding the saturated input signal power point may produce a relatively small increase in the output signal power from the saturated output signal power point. Since the power amplifier may consume a considerable portion of the power in the communication device, operating the power amplifier beyond the saturation point may waste additional power and may be an inefficient use of the power amplifier. In addition, the nonlinear behavior of the power amplifier may also cause in-band and out-of-band distortion of the signal, and may degrade the error vector magnitude (EVM) at the receiving device when the input signal power and the output power are not proportional.

[0105] In order to avoid operating the power amplifier beyond the saturation point (e.g., to avoid disadvantages associated with nonlinearity at high input powers), the power amplifier may be configured to operate at an average input power several decibels (dB) lower than the saturation point so that the input signal power may not exceed the saturated input signal power point. For example, for an input signal waveform having a high peak-to-average power ratio (PAPR), the input signal waveform may be sent in the linear region of the power amplifier by reducing the average power of the input signal. This may be referred to as "input backoff" (IBO), which may result in a proportional "output backoff" (OBO). The power amplifier may operate most efficiently when the IBO is close to or equal to the PAPR of the input signal. For example, if the input signal has a PAPR of XdB, an IBO of XdB may be applied to the power amplifier to avoid nonlinear behavior. This enables the input signal to be amplified in the linear region when the input signal waveform of the input signal is at a peak. Such techniques may prevent the output signal waveform from being distorted during amplification, which may occur when the output signal waveform or a portion of the output signal waveform is amplified in a nonlinear region.

[0106] However, if a high IBO is applied to the power amplifier, but the input signal does not have a high PAPR (e.g., IBO>>PAPR), this may be an inefficient use of the power amplifier because it may reduce the maximum amplification of the power amplifier. For example, due to the high IBO, a portion of the linear region within the power amplifier may not be used, especially the region near the saturation point, where a high input signal may be amplified to an almost proportionally high output signal. This may limit the maximum performance of the power amplifier and reduce the transmission range of the transmitting device. However, if the IBO applied to the power amplifier is too low and the input signal has a PAPR that exceeds the IBO (e.g., PAPR>>IBO), at least a portion of the input signal may be amplified at the nonlinear region of the power amplifier, which may cause the output signal to be distorted and the bit error rate (BER) performance of the transmitting device may be degraded.

[0107] Although OFDM signals may have tolerance to inter-symbol interference and good spectral efficiency, due to the large fluctuations in their signal envelopes, OFDM signals may suffer from significant PAPR, which may grow rapidly with the size of the OFDM block. For example, for networks that employ larger OFDM blocks, such as those that may be employed in 5G NR and above, the OFDM blocks may have higher PAPR. Due to the high PAPR, power amplifiers designed for communication devices capable of sending larger OFDM blocks may be configured with high IBO, which may result in inefficient use of the power amplifier when the communication device is not sending a signal with a high PAPR. Therefore, as an alternative or supplement to applying a high IBO to a power amplifier, a PAPR reduction technique may be used to reduce the PAPR of the input signal so that the IBO applied to the power amplifier can be kept at a low value to maintain the spectrum and energy efficiency of the power amplifier. In addition, by reducing the PAPR, the power amplifier can amplify the signal at a higher input power (e.g., as close to the saturation point as possible and in the linear region) and produce a higher output signal.

[0108] In some examples, PAPR reduction techniques may be data-dependent and / or computationally expensive, which may make them unsuitable for real-time implementation. For example, when a PAPR reduction mechanism is designed for the front end of a real-time transmission chain (e.g., to operate on the fly), the PAPR reduction mechanism may have a relatively short time to process the input signal. For example, each time the PAPR reduction mechanism receives an OFDM symbol, it may have less than one millisecond to process the OFDM symbol to reduce the PAPR. For most PAPR techniques, one millisecond may not be enough because a lot of processing may be involved during PAPR reduction. Clipping and filtering (CF) is one of the PAPR reduction techniques that can be used for real-time implementation, for example, because of its low complexity and low processing time. However, CF and similar techniques may distort the signal itself and cause in-band signal distortion, which may not converge to the desired solution.

[0109] Cellular networks operating in higher and wider frequency ranges (e.g., 4G LTE, 5G NR, etc.) may have abundant bandwidth in both the uplink and downlink. This may include the addition of FR2 and increasing the available bandwidth to 100 MHz in frequencies below 6 (e.g., frequencies below 6 GHz). Cellular networks with abundant or excess bandwidth may use longer OFDM symbols (e.g., larger OFDM blocks) for transmission. Although, as mentioned above, increasing the OFDM symbol size may increase the PAPR of the OFDM symbol, excess bandwidth may also be used for PAPR reduction. For example, when a transmitting device is transmitting in the uplink, there may be multiple resource blocks available for the transmitting device to use.

[0110] In some techniques described herein, a transmitting device may use a tone reservation (TR) method to reduce the PAPR of an OFDM symbol. These techniques may include scenarios in which a transmitting device may use unused, originally idle, or reserved tones (e.g., unused or reserved subcarriers) of an OFDM symbol to accommodate a peak cancellation signal that can reduce the PAPR of an OFDM symbol. For example, in a sample deployment scenario, the amplitude and phase of the reserved tones may be optimized for a given OFDM symbol to minimize the PAPR. Additionally or alternatively, a transmitting device may reserve some tones in the subcarriers of an OFDM symbol, and the reserved tones may be used for PAPR reduction rather than for sending data.

[0111] The tones used for PAPR reduction in the reservation technique may have various characteristics. For example, the tones reserved for PAPR reduction (e.g., tones containing peak cancellation signals) may be referred to as peak reduction tones (PRTs). Given that in some scenarios, there may be no overlap between one or more reserved tones and one or more data tones within one or more corresponding OFDM symbols (e.g., the reserved tones may be orthogonal to the data tones), the tone reservation scheme does not introduce any EVM and / or adjacent channel leakage ratio (ACLR) restrictions. Therefore, the receiving device may be configured to perform rate matching around the reserved tones and decode the signals in the data tones. Performing rate matching around the reserved tones (e.g., bypassing and not decoding the signals in the reserved tones) implements and provides improved device signal processing and improves communication throughput. Therefore, the reserved tones may also be referred to as "non-data tones" herein, which may include PRTs.

[0112] Different tone characteristics may help some deployments. As an example, the amplitude and phase of one or more reserved tones may be adjusted for each OFDM symbol to produce a suitable PRT. And the allocation of PRTs in each OFDM symbol may also be customized for optimized PAPR reduction. Additionally or alternatively, the number of PRTs used for each OFDM symbol may vary depending on the available bandwidth. Although the position of the PRT may be determined based on each OFDM symbol, fixing the position of the PRT for the OFDM symbol in advance may reduce the complexity of the transmitter device. Since the optimization (e.g., allocation) may be performed in advance rather than in real time, the performance of the transmitting device may be significantly improved. In addition, there may be a generally good index allocation for the PRT within the OFDM symbol.

[0113] Figure 5 5 is a diagram 500 illustrating an example allocation of reserved tones 502 (e.g., PRTs) and data tones 504 (e.g., tones containing data information) in accordance with various aspects of the present disclosure, wherein several tones are depicted within an OFDM symbol in the frequency domain. In some examples, the reserved tones 502 may be arranged between the data tones 504 such that some of the data tones 504 may be located on both sides of the reserved tones 502. In some aspects, the allocation of reserved tones 502 in the OFDM symbol may achieve low PAPR in the time domain. For example, a transmitting device may obtain a waveform of an OFDM symbol in the time domain by performing an inverse fast Fourier transform (IFFT) on the signal in the frequency domain. It should be understood that Figure 5 A sample arrangement of reserved tones and data tones is illustrated, and other examples may apply many other reserved / data tone arrangements. In some aspects, the reserved tones may be between 2% and 10% of the used tones and may be continuous tones. For example, Figure 5 Examples of consecutive tones at tones 5 and 6 and tones 10, 11, and 12 are illustrated.

[0114] In some examples, the transmitting device can customize the location and / or number of reserved tones 502 of an OFDM symbol. For example, if the transmitting device is granted / scheduled to transmit with two (2) resource blocks including twenty-four (24) tones, the transmitting device can use half of the available tones (e.g., twelve (12) tones) for the reserved tones 502, and the transmitting device can optionally use the other half of the available tones for data tones 504. In some examples, if the receiving device recognizes that the selection can be configured and / or fixed in advance through signaling, the transmitting device can select any subset of the twenty-four available tones for the reserved tones 502. For example, the transmitting device can select subsets 1, 5, 6, 8, 10, 11, 12, 15, 16, 19, 21, and 22 for the reserved tones 502, and can inform the receiving device of its selection of the subset via signaling. In some examples, the subset may be fixed in advance so that a receiving device may know which tones are reserved tones 502 without receiving additional signaling from a transmitting device.

[0115] Figure 6 600 is a diagram illustrating an example of a time domain data signal (e.g., an OFDM signal), as presented herein. A threshold 606 may be defined / configured for a transmitting device to determine whether a particular waveform of the time domain data signal has one or more peaks that exceed the threshold 606. The transmitting device may then determine whether to reduce any of the one or more peaks. For example, based on the threshold 606, the transmitting device may be able to determine that the waveform has a first peak 602 and a second peak 604 that exceed the threshold 606. The transmitting device may also determine the magnitude and location of each peak and / or the maximum peak (e.g., the first peak 602) among the peaks.

[0116] In mmWave (e.g., FR2) and sub-THz (e.g., FR4 and above) frequencies, while an increase in bandwidth (e.g., above 1 GHz) can provide a larger subcarrier spacing (SCS) (e.g., 1 MHz or above), the slot latency can also be reduced linearly. In some examples, RF power consumption (e.g., power used to transmit signals) at these frequencies can be much higher than RF power consumption at lower frequencies, where, for example, each base station or component of a base station may consume thousands of watts for a power amplifier. Therefore, PAPR reduction techniques can provide multiple benefits. For example, PAPR reduction techniques can improve the efficiency and performance of a power amplifier, thereby reducing the power used for the power amplifier.

[0117] As combined Figure 5As described, the transmitting device may select the position of the reserved tone. Since the receiving device may be configured to skip decoding the reserved tone, the frequency resource with better channel conditions (e.g., stronger tone) may be more suitable for sending data. Therefore, in some examples, the transmitting device may be configured to allocate one or more reserved tones on a channel and / or RE with a weaker channel condition. For example, a power reduction-PAPR reduction scheme based on TR may be configured to use REs (e.g., tones) where the channel is weak based on channel estimation, such as REs with a signal-to-noise ratio (SNR) below a threshold. That is, the transmitting device may allocate reserved tones (e.g., TR may be applied) to frequency resources with lower SNR. In other examples, other techniques may be used to project the signal peak into the desired SC based on TR. For example, an iterative method may be used, in which the peak distortion (e.g., equal to the desired signal minus the clipping signal) may be passed through FFT to zero the data tone and maintain the TR tone. Then, the resulting TR tone may be passed through IFFT to recalculate the peak distortion again.

[0118] Figure 7 700 is a diagram illustrating an example of a transmitting device allocating reserved tones based on the SNR 706 of a channel as presented herein. In one example, the transmitting device may first estimate the channel conditions of a channel by measuring the SNR 706 of the channel within a frequency resource or band, wherein the frequency resource or band may include multiple tones (e.g., SC). The transmitting device may obtain the SNR 706 based on one or more reference signals (e.g., CSI-RS, DMRS, SRS, etc.) sent from a receiving device. After the transmitting device estimates the channel conditions (e.g., SNR 706) of the multiple tones, the transmitting device may allocate the reserved tones to the multiple tones based at least in part on the estimated channel conditions. For example, if the transmitting device is configured to allocate reserved tones on tones with lower / lowest SNRs, the transmitting device may allocate reserved tones at tone index numbers 1, 6, 7, 8, 15, 16, and 17 because these tones may have SNRs below a threshold or lower than other tones. Because the receiving device can skip decoding the reserved tones (e.g., by performing rate matching around the reserved tones), the SNR of the reserved tones may be less important to the receiving device than the SNR of the data tones. That is, the transmitting device can use tones with lower SNRs (e.g., tones with tone index numbers 1, 6, 7, 8, 15, 16, and 17) for the reserved tones 702 and use tones with higher SNRs (e.g., tones with tone index numbers 2 to 5, 10 to 13, and 19 to 22) for the data tones 704 (e.g., for transmitting data).

[0119] In some examples, the transmitting device may indicate TR information to the receiving device indicating the allocation / position of reserved tones in one or more transmissions, so that the receiving device can recognize which tones (e.g., REs) are reserved tones and / or which tones are data tones, etc. The receiving device may then decode the one or more transmissions based on the TR information. For example, the receiving device may be configured to decode the data tones and perform rate matching around the reserved tones.

[0120] In some examples, if the receiving device has complete knowledge of the location of the reserved tones (e.g., TR information is indicated to the transmitting device), a higher PAPR gain can be achieved at the receiving device. However, depending on the number of tones (e.g., data tones and reserved tones), the TR information may take up a lot of signaling overhead. For example, referring again to Figure 7 In the example of , since there are twenty-two (22) tones in the transmission (e.g., tone indexes #1 through #22), the transmitting device may use a twenty-two bit field to indicate the location of the reserved tones 702 and / or data tones 704. For example, a bit value of one ("1") may be used to indicate a data tone, and a bit value of zero ("0") may be used to indicate a reserved tone, or vice versa.

[0121] For purposes of this disclosure, the terms "tone reservation" and "reserved tone" may be used interchangeably and may refer to tones / SCs that are not used to carry data (e.g., data tones) and / or tones / SCs used for PAPR reduction. Additionally, for purposes of this disclosure, tone reservations that are known to a receiving device (e.g., the location of the reserved tones is indicated to the receiving device) may be referred to as channel-aware tone reservations.

[0122] Figure 8 8 is a diagram 800 illustrating an example of channel-aware tone reservation as presented herein. Figure 8 In the illustrated example of , the transmitting device may be configured to map the reserved tones based on one or more criteria. For example, the transmitting device may be configured to map the reserved tones to the subcarrier (SC) with the lowest channel energy (or a channel energy below a threshold) and / or to the SC with the lowest channel capacity (or a channel capacity below a threshold) (e.g., this may be applied to MIMO), etc. For example, the transmitting device may be configured to select tone reservation positions on multiple subcarriers (e.g., allocate reserved tones) based on the measured channel powers of the subcarriers. In one example, as shown at 802, the transmitting device may be configured to select tone reservation positions on subcarriers with measured channel powers below a threshold (e.g., -10 dB).

[0123] After the transmitting device determines the location of the reserved tones and / or data tones, the transmitting device may use the data tones (e.g., represented by "X") to carry the data signal, as shown at 804. Additionally, the transmitting device may use the reserved tones (e.g., represented by "C") for PAPR reduction (e.g., for generating / constructing a tone reservation signal for PAPR reduction), as shown at 806. Then, as shown at 808, the transmitting device may send the PAPR-reduced data signal to the receiving device.

[0124] exist Figure 8 In the illustrated example of , after determining the location of the reserved tones and / or data tones, the transmitting device may indicate the location of the reserved tones and / or data tones to the receiving device, as shown at 810. The receiving device may use the indicated location to perform rate matching around the reserved tones and decode the data tones. For example, referring again to Figure 7 For example, if each data tone 704 in the vector (e.g., TR information to be indicated) is represented by a bit value of one ("1") and each reserved tone in the vector is represented by a second bit value of zero ("0"), the vector may be represented by [0,1,1,1,1,0,0,0,1,1,1,1,1,1,0,0,0,1,1,1,1,1]. In some examples, such as in Figure 7 Neutralization Figure 8 As shown at 802, due to the existing channel coherence bandwidth (e.g., similar to or equal to the channel delay spread), most of the tone reservations may be in consecutive positions. Therefore, the vector indicating the positions of the reserved tones and / or data tones may include multiple groups of zeros and ones.

[0125] Fig. 9 An example communication flow 900 is illustrated between a first wireless device 902 (e.g., which may be referred to herein as a transmitting device) and a second wireless device 904 (e.g., which may be referred to as a receiving device). In some aspects, the first wireless device may be a network entity, and various aspects may be performed by a base station or a component of the network entity (such as a CU, DU, and / or RU). Various aspects of the network entity may be performed by Figure 1 Base station 102 and / or Figure 4 In some aspects, the second wireless device 904 may be a UE, which may correspond to Figure 1 UE 104, Figure 2 204 and / or Figure 4 UE 450. Despite the Fig. 9It is not shown in the illustrated example of, but it should be understood that in additional or alternative examples, the first wireless device 902 and / or the second wireless device 904 can communicate with one or more other base stations or UEs. For example, in some aspects, the first wireless device 902 can be a network entity, the second wireless device 904 can be a UE, and the communication at 924 can be a downlink transmission. In some aspects, the first wireless device 902 can be a UE, the second wireless device 904 can be a network entity, and the communication at 924 can be an uplink transmission. In some aspects, the first wireless device 902 can be a first UE, the second wireless device 904 can be a second UE, and the communication at 924 can be a sidelink transmission.

[0126] In the illustrated example, the communication flow 900 facilitates a first wireless device 902 providing an indication of a TR position to a second wireless device 904. The second wireless device 904 may use the indication of the TR position to decode a communication from the first wireless device, for example, by performing rate matching around a reserved tone in a downlink communication. The communication may be a downlink, uplink, or sidelink communication. Fig. 9 In an example of , the tone used for TR can be a subcarrier (SC) for the entire time slot or at least for the duration of a communication (such as PDSCH, PUSCH or PSSCH). In some examples, the pattern of TR positions can be different for each time slot, for example, to indicate another spatial direction for which a new possible channel null can be calculated.

[0127] although Fig. 9 The examples described illustrate that the first wireless device 902 applies tone reservation for transmissions to the second wireless device 904 (e.g., for downlink (DL) transmissions), but they are for illustrative purposes only. The aspects presented herein may also be applied to uplink (UL) transmissions or sidelink (SL) transmissions of the second wireless device. In addition, the numbers associated with the communication flows (e.g., 914, 916, etc.) do not specify a particular time order and are merely used as reference labels for the communication flows.

[0128] At 912, the second wireless device 904 may transmit one or more reference signals received by the first wireless device 902, such as a sounding reference signal (SRS) from a UE or another reference signal from a network entity. Based on the received reference signals, the first wireless device 902 may estimate a channel condition of a channel (e.g., a channel for receiving data from the second wireless device 904) at 914 and associate with a channel for transmitting data to the second wireless device. In one example, the first wireless device 902 may estimate a downlink channel (e.g., a channel for transmitting data to the first wireless device 902) at 916 based on channel reciprocity, wherein the first wireless device 902 may be configured to assume that the channel conditions of the downlink channel and the uplink channel will be similar or the same. In another example, the first wireless device 902 may estimate an uplink channel (e.g., a channel for transmitting data to the first wireless device 902) at 916 based on channel reciprocity, wherein the first wireless device 902 may be configured to assume that the channel conditions of the uplink channel and the downlink channel will be similar or the same. In one example, the first wireless device 902 may estimate a first side link channel (e.g., a channel used to send data to the first wireless device 902) based on channel reciprocity at 916, wherein the first wireless device 902 may be configured to assume that channel conditions of the second side link channel and the first side link channel will be similar or identical.

[0129] At 920, the first wireless device 902 can select a location for the reserved tones. In some examples, the first wireless device 902 can determine the number of tones (e.g., SC) to be transmitted for one or more transmissions (e.g., communication at 924) and the number of tones to be designated / allocated as reserved tones. That is, the first wireless device 902 can determine the number of tones to be used for TR, such as in conjunction with Figure 7 and Figure 8 The first wireless device 902 can then determine the location of the reserved tones based on the determined number of tones. In one example, as combined with Figure 7 and Figure 8 As described, the first wireless device 902 may determine the location of the reserved tones based on the channel conditions (e.g., measured energy) of the tones (e.g., associated SCs), wherein the first wireless device 902 may allocate the determined number of reserved tones to the SC with the minimum energy or the lowest SNR. For purposes of this disclosure, the SC with the minimum energy or the lowest SNR may also be referred to as a "channel null."

[0130] like Fig. 9As shown, the first wireless device 902 may output a TR position indication 922, which is received by the second wireless device 904. The TR position indication 922 may indicate the location of the reserved tone in the communication. In some examples, the signaling for the TR position may be carried by downlink control information (DCI), medium access control (MAC)-control element (CE) (MAC-CE) and / or radio resource control (RRC) message, or any combination of those signaling.

[0131] exist Fig. 9 In the example of , the first wireless device 902 can send a communication 924, which is received by the second wireless device 904. The communication 924 can be based on the TR (e.g., based on the TR position indication 922). The communication 924 can be a downlink communication, an uplink communication, or a sidelink communication. For example, the first wireless device 902 can insert the TR position and value into the mapper along with the data. The first wireless device 902 can then continue with the conventional OFDM transmission protocol (IFFT, etc.) along with the added signaling.

[0132] In some examples, if aspects disclosed herein are applied at the second wireless device 904 for uplink transmissions to the first wireless device 902 (e.g., the second wireless device 904 performs TR signaling for uplink transmissions), the first wireless device 902 can signal the second wireless device 904 to use the channel null TR and the positions of those tones (or the second wireless device 904 can report the selected positions to the first wireless device 902). For example, if the second wireless device 904 is to send an uplink transmission to the first wireless device 902 based on the TR, the second wireless device 904 can use the same TR position as used by the first wireless device 902 (e.g., in a previous transmission), the first wireless device 902 can indicate to the second wireless device 904 which TR position to use (e.g., if different from the TR position used by the first wireless device 902), and / or the second wireless device 904 can determine the TR position itself (e.g., such as based on the SC with the lowest SNR or the smallest measured energy, etc.) and indicate the TR position to the first wireless device 902.

[0133] At 930 , the second wireless device 904 may determine and / or calculate a TR position for transmission (eg, communication 924 ) based on the TR position indication 922 .

[0134] At 932, the second wireless device 904 may decode the communication 924 based on the determined TR position (e.g., at 930). For example, the second wireless device 904 may be configured to decode the data tones and skip / ignore the reserved tones. Fig. 9In the illustrated example of , the second wireless device 904 may perform rate matching around the determined TR position at 934 as part of decoding the communication 924 .

[0135] In some examples, the TR position indication 922 can use existing signaling so that the second wireless device 904 can skip decoding the subcarriers at the location of the reserved tone without receiving specific signaling dedicated to indicating the TR position.

[0136] For example, the TR position indication 922 can be based on a CSI-RS, such as a zero-point (ZP) CSI-RS (ZP-CSI-RS). For example, the first wireless device 902 can send a ZP-CSI-RS at a position corresponding to a reserved tone (e.g., as selected by the first wireless device 902 at 920). In such an example, the second wireless device 904 can determine to rate match around the position of the ZP-CSI-RS because the ZP-CSI-RS may not include data for decoding by the second wireless device 904. However, such techniques may increase the amount of CSI-RS resources because there may be a large number of selected TR positions.

[0137] In some examples, the TR position indication 922 can be implemented via a MAC scheduler at the first wireless device 902. For example, for the TR position selected by the first wireless device 902 (e.g., at 920), the MAC scheduler of the first wireless device 902 may not allocate data tones to PRBs corresponding to reserved tones (SC). Figure 8 In an example of , the MAC scheduler may skip using the PRBs corresponding to the selected tone reservation positions on the subcarrier at 802. However, such techniques may place constraints on the MAC scheduler regarding which PRBs may be used to communicate a transmission (e.g., communication 924) to the second wireless device 904.

[0138] In some examples, the TR position indication 922 may be implemented using a PRB-symbol bitmap rate matching pattern. Fig.10 and Fig.11 Aspects of the PRB-symbol bitmap rate matching mode are described.

[0139] Fig.10 is a diagram 1000 illustrating an example of a PRB-symbol rate matching pattern as presented herein. Fig.11 Depicted are a first pseudo-code 1100 and a second pseudo-code 1150 for facilitating an example PRB-symbol rate matching mode as presented herein.

[0140] exist Fig.11In the example, the first pseudocode 1100 shows information that can be provided to configure multiple PRB rate matching patterns with corresponding identifiers ("rateMatchPatternID"). Each PRB rate matching pattern may include a pattern type, a bitmap indicating the length in a resource block. The pattern may indicate the symbols in the resource block. For example, the PRB rate matching pattern may be based on a bitmap ("resourceBlocks") with a length of 275 bits. Additionally, when the symbols in a resource block are used for one time slot ("oneSlot"), a bitmap with a length of 14 bits may be used, or when the symbols in a resource block are used for two time slots ("twoSlots"), a bitmap with a length of 28 bits may be used. The pattern may include periodicity and a pattern. The pattern may be associated with a control resource set (CORESET) and / or a subcarrier spacing. The second pseudocode 1150 illustrates an additional example of the configuration of a rate matching pattern associated with a cell-specific reference signal (CRS) (e.g., a PRB rate matching pattern configured via the first pseudocode 1100).

[0141] Reference again Fig.10 For example, the RB bitmap 1002 may indicate the locations of RBs around which the second wireless device 904 may perform rate matching. For example, with respect to the RB bitmap 1002, a first bit value ("1") may be used to indicate RBs around which rate matching is to be performed (e.g., RBs corresponding to the selected TR position), and a second bit zero ("0") may be used to indicate RBs to be decoded (e.g., RBs corresponding to data tones), or vice versa.

[0142] Fig.10 The example also includes a symbol bitmap 1004, which can indicate the positions of symbols around which the second wireless device 904 can perform rate matching. For example, with respect to the symbol bitmap 1004, a first bit value ("1") can be used to indicate a symbol around which rate matching is to be performed (e.g., a symbol corresponding to a selected TR position), and a second bit zero ("0") can be used to indicate a symbol to be decoded (e.g., a symbol corresponding to a data tone), or vice versa.

[0143] Fig.10 The example also includes a slot bitmap 1006, which can indicate the positions of time slots around which the second wireless device 904 can perform rate matching. For example, with respect to the slot bitmap 1006, a first bit value ("1") can be used to indicate a time slot around which rate matching is to be performed (e.g., a time slot corresponding to a selected TR position), and a second bit zero ("0") can be used to indicate a time slot to be decoded (e.g., a time slot corresponding to a data tone), or vice versa.

[0144] exist Fig.10 In the illustrated example, although the corresponding bitmap can be Fig. 9 The first wireless device 902 can indicate certain RBs, symbols and / or time slots around which rate matching is to be performed, but Fig.10 The example of does not provide information at a granular level suitable for the selected TR position. For example, the selected TR position may correspond to a tone (or subcarrier) at a finer granularity than an RB, symbol, and / or slot. Thus, there may be RBs, symbols, and / or slots around which rate matching is performed, while the selected TR position may correspond to a tone within a symbol.

[0145] Reference again Fig. 9 In some examples, the TR position indication 922 may correspond to a subcarrier bitmap. For example, each bit of the subcarrier bitmap may indicate whether the corresponding subcarrier corresponds to a data tone or a reserved tone. Such a subcarrier bitmap may provide an appropriate level of granularity so that additional resources are not wasted by performing rate matching around an entire RB, symbol, and / or time slot. However, compared to the PRB rate matching mode, the subcarrier bitmap may have a large message size. For example, and again referring to Fig.11 In the example first pseudo code 1100, the PRB rate matching pattern may include 275 bits corresponding to a resource block and another 14 bits corresponding to one time slot (e.g., 275+14=289 bits). In contrast, the subcarrier bitmap may have a much larger message size because there may be 12 tones (subcarriers) in a PRB, which may result in a bitmap of 3300 bits (e.g., 275×12=3300 bits). That is, each subcarrier bitmap bit may correspond to one subcarrier of a time slot.

[0146] In an example where the first wireless device 902 employs a subcarrier bitmap, the first wireless device 902 can output a TR position configuration 910 that configures one or more subcarrier bitmap patterns at the second wireless device 904. The first wireless device 902 can signal the TR position configuration 910 via RRC signaling received by the second wireless device 904. In some such examples, the TR position indication 922 can include a DCI indicating a particular subcarrier bitmap pattern from among the one or more subcarrier bitmap patterns.

[0147] In some examples, to facilitate reducing the size of the subcarrier bitmap, the granularity level of the subcarrier bitmap may correspond to a subcarrier group (SCG) including N subcarriers, where N is an integer greater than one. In some such examples, the size of the subcarrier bitmap may be reduced by a factor of N. For example, if an SCG includes 4 SCs, the length of the subcarrier bitmap may be reduced by a factor of four (e.g., 275 / 4×12=825 bits).

[0148] In some examples, the TR position indication 922 may correspond to signaling including a subcarrier resource indicator value (subcarrier RV). The subcarrier RIV may be referred to as an SRIV, a TR RIV (TRIV), a RIV for TR, etc. For example, the TR position indication 922 may include a DCI that includes one or more subcarrier RVs. In some such examples, each subcarrier RIV of the one or more subcarrier RIVs may correspond to an SCG including N subcarriers, where N is an integer greater than or equal to one. For example, the TR position indication 922 may include a cumulative number of subcarrier RIVs per SCG. In some examples, the subcarrier RIV may be an encoded value (e.g., a subcarrier RIV code point) that may correspond to a starting subcarrier and a subcarrier length. For example, after receiving the TR position indication 922 including one or more subcarrier RIVs, the second wireless device 904 may determine the TR position at 930 by decoding each subcarrier RIV code point to determine each corresponding starting subcarrier and a corresponding subcarrier length. That is, for the first subcarrier RIV code point received by the TR position indication 922, the second wireless device 904 can determine the first starting subcarrier and the corresponding subcarrier length. The subcarrier length can correspond to the number of consecutive subcarriers included in the TR position.

[0149] It should be understood that the DCI indicating the subcarrier RIV (e.g., TR position indication 922) may have a larger size in terms of bits than the DCI scheduling the communication 924 at the second wireless device 904. In some aspects, if the granularity is increased from 1 subcarrier to N subcarriers, the increase in DCI size may be smaller (e.g., fewer added bits), as described above. Additionally, the subcarrier RIV size at the subcarrier granularity may be different for different frequency ranges. For example, for FR2, the subcarrier RIV size may vary between 11 bits and 18 bits for FR2, and may vary between 15 bits and 22 bits for FR1.

[0150] In some examples, TR position indication 922 may correspond to signaling including CSI-RS for TR. In some examples, CSI-RS for TR may correspond to a pattern of physical resources allocated to corresponding CSI-RS for TR. For example, Fig.12 1200 is a diagram illustrating an example mapping of CSI-RS to physical resources as presented herein. Fig.12 In the example of , different patterns are called "rows" and may include different combinations of physical resources mapped to different CSI-RS. Fig.12 As shown, the physical resources mapped to the CSI-RS pattern are limited to a subset of the symbols in the time slot. However, the CSI-RS for TR can be mapped so that the corresponding resources are allocated for the entire time slot.

[0151] Reference again Fig. 9 In some examples, the TR position indication 922 may include an indication of a CSI-RS for a TR and correspond to a CSI-RS pattern. For example, the first wireless device 902 may send a TR position configuration 910 received by the second wireless device 904. The TR position configuration 910 may map one or more CSI-RS to a pattern of corresponding physical resources, such as Fig.12 In some examples, TR position configuration 910 may indicate a first CSI-RS set mapped to a first pattern of a first physical resource, where the first pattern of the first physical resource occupies less than all symbols of a time slot for a first subcarrier, such as Fig.12 As shown. TR location configuration 910 may also indicate a second CSI-RS set mapped to a second pattern of a second physical resource, the second pattern of the second physical resource occupying all symbols of the time slot for the second subcarrier. It should be understood that the first CSI-RS set may correspond to a CSI-RS for a non-tone reserved scenario, and the second CSI-RS set may correspond to a CSI-RS for a TR. For example, in Fig.12 In the example of , there are 18 different CSI-RS patterns that may correspond to the first CSI-RS set. TR position configuration 910 may include additional CSI-RS patterns that may correspond to a second CSI-RS set (e.g., a CSI-RS for TR, which may be different from the CSI-RS for non-tone reserved purposes). For example, the CSI-RS for TR may have a different subcarrier allocation, a different number of contiguous subcarriers in a PRB, a different density (e.g., every PRB, every other PRB, or more), or a different CDM group than the CSI-RS for non-tone reserved purposes.

[0152] In some examples, TR location configuration 910 may include a set of CSI-RS mapped to a first pattern of a first physical resource, such as Fig.12 The TR position configuration 910 may also include a flag indicating whether a particular CSI-RS pattern is to be extended across the entire time slot. For example, the configuration of each CSI-RS pattern may include a flag that may be set to a bit value of one (1) to indicate that the corresponding mapping is extended across the entire time slot, or may be set to a bit value of zero (0) to indicate that the corresponding mapping is not extended across the entire time slot (e.g., leaving the corresponding mapping as Fig.12 ). The CSI-RS for the TR may also be activated in other ways (e.g., based on an indication for the TR in the reporting amount or reporting type configuration). In some examples, the TR position indication 922 indicates whether the CSI mode is applied or not applied (e.g., activated or deactivated).

[0153] In some examples, the pattern of physical resources for the CSI-RS of the TR configured by the TR position configuration 910 may include a starting resource block indicator of the time slot and an indicator of the number of resource blocks spanned by the CSI-RS. In some examples, the starting block indicator and the indicator of the number of resource blocks may each correspond to a multiple of one resource block, which may improve the granularity of the RBs indicated for rate matching to be performed around them by the second wireless device 904.

[0154] Fig.13 1300 is a flowchart of a method of wireless communication. The method may be performed by a second wireless device (e.g., UE 104; UE 450; apparatus 1404). The method may be performed by a second wireless device 904. The method may be performed by a network entity such as a base station or a component of a base station (e.g., base station 102; base station 410; CU 106, one or more CU 210; DU 105, one or more DU 230; RU 109, one or more RU 240; network entity 1602). The method provides various aspects for improved signaling of tone reservation information, such as between a network and a UE or between UEs. Using channel-aware tone reservation can reduce PAPR while informing a receiver (e.g., such as a UE receiving a downlink or sidelink transmission or a network entity receiving uplink communications) of tones to be discarded. Using tone reservation can improve wireless communication performance, and Fig.13 The method provides signaling to inform the receiving device of the TR in a manner that helps reduce receiver complexity.

[0155] At 1302, the second wireless device receives a first indication of a TR position set associated with a communication channel from the first wireless device, the first indication of the TR position set including at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR. The communication channel may be a downlink channel and an uplink channel or a sidelink channel. Receiving may be performed, for example, by the TR component 198, the transceiver 1422, and / or one or more antennas 1480. In some aspects, the first indication of the TR position set may be received via RRC signaling (e.g., included in the RRC signaling) and may include one or more subcarrier bitmaps. In some aspects, the second wireless device may also receive a second indication of activation of the TR position set from the first wireless device. As an example, the second indication may be received via DCI (e.g., included in the DCI). Each of the one or more subcarrier bitmaps may indicate a pattern of TR positions for a time slot. Each subcarrier bitmap bit may correspond to a subcarrier of a time slot. Each subcarrier bitmap bit may correspond to a subcarrier group (SCG) including N subcarriers, where N is an integer greater than or equal to one.

[0156] In some aspects, a first indication of a set of TR positions may be received via DCI (e.g., included in the DCI) and may include one or more subcarrier RIVs. The indication may be similar to a RIV (which may provide resource allocations for consecutive PRBs), but may provide an indication of one or more subcarriers used for TR. The indication may be referred to as a class RIV, a subcarrier RIV, a TR RIV, etc. Each of the one or more subcarrier RIVs may correspond to an SCG including N subcarriers, where N is an integer greater than one. Each of the one or more subcarrier RIVs may correspond to a coded value indicating a starting subcarrier and a subcarrier length. The DCI includes a cumulative number of subcarrier RIVs per SCG.

[0157] In some aspects, the first indication of the set of TR positions may be received via a CSI reference signal for TR (e.g., included in a CSI-RS for TR) and may correspond to a pattern of physical resources allocated to the CSI reference signal for TR. In some aspects, the second wireless device may also receive a configuration from the first wireless device that maps one or more CSI reference signals to a pattern of corresponding physical resources. The configuration may indicate a first set of CSI reference signals mapped to a first pattern of first physical resources, where the first pattern of the first physical resource occupies less than all symbols of the time slot for a first subcarrier, and the configuration may indicate a second set of CSI reference signals mapped to a second pattern of second physical resources, where the second pattern of the second physical resource occupies all symbols of the time slot for a second subcarrier. In some aspects, the indication may add a flag after the first set of resources (e.g., rows 1 to 18) indicating whether the CSI-RS resources for TR extend over the entire time slot. The configuration may indicate a set of CSI reference signals mapped to a first pattern of first physical resources, and the configuration includes a second indication indicating whether the corresponding pattern of physical resources extends to all symbols of the time slot of the subcarrier. The pattern of physical resources may include a starting resource block indicator of a time slot and an indicator of the number of resource blocks spanned by the CSI reference signal. The starting resource block indicator and the indicator of the number of resource blocks may each correspond to a multiple of one resource block.

[0158] At 1304, the second wireless device receives a communication including one or more data tones and one or more reserved tones in the same symbol. The reception may be performed, for example, by the TR component 198, the transceiver 1422, and / or the one or more antennas 1480. For example, the second wireless device may receive a downlink transmission from a first wireless device, such as a base station or a component of a base station. As another example, the second wireless device may receive an uplink or sidelink transmission from a first wireless device, such as a UE.

[0159] At 1306, the second wireless device decodes the communication based on the TR position set. In some aspects, as part of decoding the communication, the second wireless device may rate match around the one or more reserved tones based on the first indication of the TR position set. The decoding and / or rate matching may be performed, for example, by the TR component 198.

[0160] Fig.141400 is a diagram illustrating an example of a hardware implementation for an apparatus 1404. The apparatus 1404 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 1404 may include one or more processors (or processing circuits) including a cellular baseband processor 1424 (also referred to as a modem) coupled to one or more transceivers (e.g., a cellular RF transceiver 1422). The cellular baseband processor 1424 may include at least one on-chip memory 1424'. In some aspects, the apparatus 1404 may also include one or more subscriber identity module (SIM) cards 1420 and an application processor 1406 coupled to a secure digital (SD) card 1408 and a screen 1410. The application processor 1406 may include an on-chip memory 1406'. In some aspects, the device 1404 may also include a Bluetooth module 1412, a WLAN module 1414, an SPS module 1416 (e.g., a GNSS module), one or more sensor modules 1418 (e.g., an atmospheric pressure sensor / altimeter; a motion sensor such as an inertial measurement unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio-aided detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 1426, a power source 1430, and / or a camera 1432. The Bluetooth module 1412, the WLAN module 1414, and the SPS module 1416 may include an on-chip transceiver (TRX) (or in some cases, only a receiver (RX)). The Bluetooth module 1412, the WLAN module 1414, and the SPS module 1416 may include their own dedicated antennas and / or communicate using one or more antennas 1480. The cellular baseband processor 1424 communicates with the UE 104 and / or with the RU associated with the network entity 1402 via one or more antennas 1480 through a transceiver (e.g., a cellular RF transceiver 1422). The cellular baseband processor 1424 and the application processor 1406 may each include a computer-readable medium / memory, such as an on-chip memory 1424' and an on-chip memory 1406', respectively. The additional memory module 1426 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory (e.g., on-chip memory 1424', on-chip memory 1406', and / or additional memory module 1426) may be non-transitory. The cellular baseband processor 1424 and the application processor 1406 are each responsible for general processing, including executing software stored on a computer-readable medium / memory. The software, when executed by the cellular baseband processor 1424 / application processor 1406, enables the cellular baseband processor 1424 / application processor 1406 to perform the various functions described above.The cellular baseband processor 1424 and the application processor 1406 are configured to perform the various functions described above based at least in part on information stored in the memory. That is, the cellular baseband processor 1424 and the application processor 1406 may be configured to perform a first subset of the various functions described above without the information stored in the memory, and may be configured to perform a second subset of the various functions described above based on the information stored in the memory. The computer-readable medium / memory (or memory circuit) may also be used to store data manipulated by the cellular baseband processor 1424 / application processor 1406 when executing software. The cellular baseband processor 1424 / application processor 1406 may be a component of the UE 450 and may include a memory 460, and / or at least one of the TX processor 468, the RX processor 456, and the controller / processor 459. In one configuration, the device 1404 may be at least one processor chip (modem and / or application) and include only the cellular baseband processor 1424 and / or the application processor 1406, while in another configuration, the device 1404 may be the entire UE (e.g., see. Figure 4 UE 450) and includes additional modules of device 1404.

[0161] As discussed above, the TR component 198 is configured to: receive a first indication of a TR position set associated with a communication channel from a first wireless device (e.g., a network entity or another UE), the first indication of the TR position set comprising at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; receive a communication comprising one or more data tones and one or more reserved tones in the same symbol; and decode the communication based on the TR position set. In some aspects, for example, to decode the communication, the TR component 198 may be further configured to rate match around the one or more reserved tones based on the first indication of the TR position set. In some aspects, the TR component 198 may be further configured to receive a second indication of activation of the TR position set from the first wireless device. In some aspects, the TR component 198 may be further configured to receive a configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources from the first wireless device. The TR component 198 may be further configured to perform a combined Fig.13 The flowcharts described in and / or by Fig. 9Any of the aspects performed by the second wireless device 904 in the communication process 900 of the present invention. The TR component 198 may be within the cellular baseband processor 1424, the application processor 1406, or both the cellular baseband processor 1424 and the application processor 1406. As discussed above, the TR component 199 is configured to: select a TR position set associated with a channel, the TR position set selected based on an estimate of the associated channel; output a first indication of the TR position set associated with the communication channel, the first indication of the TR position set including at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and output a communication of a first data tone set and a second reserved tone set included in the same symbol based on the first indication of the TR position set. In some aspects, the TR component 199 may be further configured to output a second indication of activation of the TR position set. In some aspects, the TR component 199 may be further configured to output a configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources. The TR component 199 may be further configured to perform a combination Fig.15 The flowcharts described in and / or by Fig. 9 The TR component 199 may be within the cellular baseband processor 1424, the application processor 1406, or both the cellular baseband processor 1424 and the application processor 1406.

[0162] TR component 198 or 199 can be one or more hardware components that are specifically configured to perform the stated process / algorithm, implemented by one or more processors (or processor circuits) configured to perform the stated process / algorithm, stored in a computer-readable medium (e.g., at least one memory or memory circuit) for implementation by one or more processors, or some combination of these operations. When multiple processors are implemented, the multiple processors can perform the stated process / algorithm individually or in any combination.

[0163] As shown, the device 1404 may include multiple components configured for various functions. In one configuration, the device 1404, and specifically the cellular baseband processor 1424 and / or the application processor 1406, includes: a component for receiving a first indication of a TR position set associated with a downlink channel from a network entity, the first indication of the TR position set including at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; a component for receiving a communication including one or more data tones and one or more reserved tones in the same symbol; and a component for decoding the communication based on the TR position set. In some aspects, for example, in order to decode the communication, the device 1404 may also include: a component for performing rate matching around one or more reserved tones based on the first indication of the TR position set. In some aspects, the device 1404 may also include a component for receiving a second indication of activation of the TR position set from the network entity. In some aspects, the device 1404 may also include a component for receiving a configuration of a mode for mapping one or more CSI reference signals to corresponding physical resources from the network entity. The device 1404 may also include a device for performing the combination Fig.13 The flowcharts described in and / or by Fig. 9 Any of the aspects performed by the UE in the communication process 900.

[0164] In one configuration, the apparatus 1404 may include: means for selecting a TR position set associated with a communication channel, the TR position set selected based on an estimate of the associated channel; means for outputting a first indication of the TR position set associated with the communication channel, the first indication of the TR position set comprising at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and means for outputting a communication of a first data tone set and a second reserved tone set included in the same symbol based on the first indication of the TR position set. In some aspects, the apparatus 1404 may also include means for receiving a second indication of activation of the TR position set. The apparatus 1404 may also include means for performing a combined Fig.15 The flowcharts described in and / or by Fig. 9 The apparatus 1404 may further include means for outputting a configuration of a pattern for mapping one or more reference signals to corresponding physical resources.

[0165] A means may be a TR component 198 and / or a TR component 199 of the apparatus 1404 configured to perform the functions recited by the means. As described above, the apparatus 1404 may include a TX processor 468, an RX processor 456, and a controller / processor 459. Thus, in one configuration, a means may be a TX processor 468, an RX processor 456, and / or a controller / processor 459 configured to perform the functions recited by the means.

[0166] Fig.15 1500 is a flow chart of a method of wireless communication at a first wireless device. The method may be performed by a network entity such as a base station or a component of a base station (e.g., base station 102; base station 410; CU 106, one or more CU 210; DU 105, one or more DU 230; RU 109, one or more RU 240; network entity 1602). The network entity may be referred to as a network node. The method may be performed by a UE (e.g., UE 104, UE 450; device 1404). The method may be performed by Fig. 9 The method provides various aspects for improved signaling of tone reservation information, such as between a network and a UE or between UEs. Using channel-aware tone reservation can reduce PAPR while informing a receiver (e.g., such as a UE or a network entity) of tones to be discarded. Using tone reservation can improve wireless communication performance, and Fig.15 The method provides signaling to inform the receiver of the TR in a manner that helps reduce receiver complexity.

[0167] At 1502, the first wireless device selects a TR position set associated with a communication channel, the TR position set selected based on an estimate of the associated channel. The selection may be performed, for example, by the TR component 199. TR selection may be based on channel conditions to reduce PAPR and improve communication performance. In some aspects, the communication channel may be a downlink channel, and the associated channel may be an uplink channel. In some aspects, the communication channel may be an uplink channel, and the associated channel may be a downlink channel. In some aspects, the communication channel may be a first side link channel, and the second channel may be a second side link channel.

[0168] At 1504, the first wireless device outputs a first indication of a set of TR positions associated with the downlink channel to the second wireless device, the first indication of the set of TR positions comprising at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR. As an example, the first wireless device may send a first indication of a set of TR positions associated with the communication channel to the second wireless device, the first indication of the set of TR positions comprising at least one of a subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR. The outputting may be performed, for example, by the TR component 199.

[0169] In some aspects, a first indication of a TR position set may be output via RRC signaling (e.g., included in RRC signaling) and may include one or more subcarrier bitmaps. In some aspects, the first wireless device may also output (e.g., send to the second wireless device) a second indication of activation of the TR position set to the second wireless device. As an example, the second indication may be output via DCI (e.g., included in DCI). Each of the one or more subcarrier bitmaps may indicate a pattern of TR positions for a time slot. Each subcarrier bitmap bit may correspond to a subcarrier of a time slot. Each subcarrier bitmap bit may correspond to a subcarrier group (SCG) including N subcarriers, where N is an integer greater than or equal to one.

[0170] In some aspects, a first indication of a set of TR positions may be output via a DCI (e.g., included in the DCI) and may include one or more subcarrier RIVs. The indication may be similar to a RIV (which may provide resource allocations for consecutive PRBs), but may provide an indication of one or more subcarriers used for TR. The indication may be referred to as a class RIV, a subcarrier RIV, a TR RIV, etc. Each of the one or more subcarrier RIVs may correspond to an SCG including N subcarriers, where N is an integer greater than one. Each of the one or more subcarrier RIVs may correspond to a coded value indicating a starting subcarrier and a subcarrier length. The DCI includes a cumulative number of subcarrier RIVs per SCG.

[0171] In some aspects, a first indication of a set of TR positions may be output via a CSI reference signal for TR (e.g., included in a CSI-RS for TR) and may correspond to a pattern of physical resources allocated to the CSI reference signal for TR. In some aspects, the first wireless device may also output to the second wireless device a configuration of a pattern of mapping one or more CSI reference signals to corresponding physical resources. The configuration may indicate a first set of CSI reference signals mapped to a first pattern of first physical resources, where the first pattern of the first physical resource occupies less than all symbols of the time slot for a first subcarrier, and the configuration may indicate a second set of CSI reference signals mapped to a second pattern of second physical resources, where the second pattern of the second physical resource occupies all symbols of the time slot for a second subcarrier. In some aspects, the indication may add a flag after the first set of resources (e.g., rows 1 to 18 or less) indicating whether the CSI-RS resources for TR extend over the entire time slot. In some aspects, the resource set may be less than rows 1 to 18, for example, if the CSI-RS patterns are distinguished by the number of symbols. The configuration may indicate a set of CSI reference signals of a first pattern mapped to a first physical resource, and the configuration includes a second indication indicating whether the corresponding pattern of the physical resource extends to all symbols of the time slot of the subcarrier. The pattern of the physical resource may include a starting resource block indicator of the time slot and an indicator of the number of resource blocks spanned by the CSI reference signal. The starting resource block indicator and the indicator of the number of resource blocks may each correspond to a multiple of one resource block.

[0172] At 1506, the first wireless device may output communications including the first set of data tones and the second set of reserved tones in the same symbol to the second wireless device based on the first indication of the set of TR positions. For example, the network entity may send communications including the first set of data tones and the second set of reserved tones in the same symbol to the second wireless device based on the first indication of the set of TR positions. The outputting may be performed, for example, by a TR component.

[0173] Fig.161600 is a diagram illustrating an example of a hardware implementation for a network entity 1602. The network entity 1602 may be a BS, may be a component of a BS, or may implement BS functionality. The network entity 1602 may include at least one of a CU 1610, a DU 1630, or a RU 1640. For example, depending on the layer functionality handled by the TR component 199, the network entity 1602 may include a CU 1610; both a CU 1610 and a DU 1630; each of the CU 1610, the DU 1630, and the RU 1640; the DU 1630; both a DU 1630 and a RU 1640; or the RU 1640. The CU 1610 may include at least one CU processor 1612 (or processor circuit). The CU processor 1612 may include at least one on-chip memory 1612' (or memory circuit). In some aspects, the CU may also include an additional memory module 1614 and a communication interface 1618. CU 1610 communicates with DU 1630 via a midhaul link (such as an F1 interface). DU 1630 may include at least one DU processor 1632 (or processor circuit). DU processor 1632 may include at least one on-chip memory 1632' (or memory circuit). In some aspects, DU 1630 may also include an additional memory module 1634 and a communication interface 1638. DU 1630 communicates with RU 1640 via a fronthaul link. RU 1640 may include at least one RU processor 1642 (or processor circuit). RU processor 1642 may include at least one on-chip memory 1642' (or memory circuit). In some aspects, RU 1640 may also include an additional memory module 1644, one or more transceivers 1646, an antenna 1680, and a communication interface 1648. RU 1640 communicates with UE 104. On-chip memory (e.g., on-chip memory 1612', on-chip memory 1632', and / or on-chip memory 1642') and / or additional memory modules (e.g., additional memory module 1614, additional memory module 1634, and / or additional memory module 1644) may each be considered to be a computer-readable medium / memory. Each computer-readable medium / memory may be non-transitory. Each of the CU processor 1612, the DU processor 1632, and the RU processor 1642 is responsible for general processing, including executing software stored on the computer-readable medium / memory. The software, when executed by the corresponding processor, enables the processor to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the processor when executing the software.

[0174] As discussed above, the TR component 199 is configured to: select a TR position set associated with a downlink channel, the TR position set selected based on an estimate of an uplink channel; output a first indication of the TR position set associated with the downlink channel to the UE, the first indication of the TR position set including at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and output to the UE, based on the first indication of the TR position set, a communication of a first data tone set and a second reserved tone set included in the same symbol. In some aspects, the TR component 199 may be further configured to output to the UE a second indication of activation of the TR position set. In some aspects, the TR component 199 may be further configured to output to the UE a configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources. The TR component 199 may be further configured to perform a combined Fig.15 The flowcharts described in and / or by Fig. 9 Any aspects of the network execution in the communication process 900.

[0175] As discussed above, the TR component 198 may be configured to: receive a first indication of a TR position set associated with an uplink channel from a UE, the first indication of the TR position set comprising at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; receive a communication comprising one or more data tones and one or more reserved tones in the same symbol; and decode the communication based on the TR position set. In some aspects, for example, to decode the communication, the TR component 198 may be further configured to rate match around the one or more reserved tones based on the first indication of the TR position set. In some aspects, the TR component 198 may be further configured to receive a second indication of activation of the TR position set from the UE. In some aspects, the TR component 198 may be further configured to receive a configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources from the UE. The TR component 198 may be further configured to perform a combined Fig.13 The flowcharts described in and / or by Fig. 9 Any of the aspects performed by the second wireless device in the communication process 900.

[0176] The TR component 198 or 199 may be within one or more processors of one or more of the CU 1610, DU 1630, and RU 1640. The TR component 199 may be one or more hardware components specifically configured to perform the stated process / algorithms, implemented by one or more processors configured to perform the stated process / algorithms, stored in a computer-readable medium for implementation by one or more processors, or some combination of these operations. When multiple processors are implemented, the multiple processors may perform the stated process / algorithms individually or in combination.

[0177] The network entity 1602 may include a variety of components configured for various functions. In one configuration, the network entity 1602 includes a component for selecting a TR position set associated with a downlink channel, the TR position set selected based on an estimate of an uplink channel; a component for outputting a first indication of the TR position set associated with the downlink channel to a UE, the first indication of the TR position set including at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; and a component for outputting to the UE, based on the first indication of the TR position set, a communication of a first data tone set and a second reserved tone set included in the same symbol. In some aspects, the network entity 1602 may also include a component for outputting a second indication of activation of the TR position set to the UE. The network entity 1602 may also include a component for performing a combined Fig.15 The flowcharts described in and / or by Fig. 9 The network entity 1602 may further include a component for outputting to the UE a configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources.

[0178] The network entity 1602 may include: a component for receiving a first indication of a TR position set associated with an uplink channel from a first wireless device, the first indication of the TR position set including at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI-RS for TR; a component for receiving a communication including one or more data tones and one or more reserved tones in the same symbol; and a component for decoding the communication based on the TR position set. In some aspects, for example, to decode the communication, the network entity 1602 may also include: a component for performing rate matching around the one or more reserved tones based on the first indication of the TR position set. In some aspects, the network entity 1602 may also include a component for receiving a second indication of activation of the TR position set from the first wireless device. In some aspects, the network entity 1602 may also include a component for receiving a configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources from the first wireless device. The device 1404 may also include a component for performing a combined Fig.13 The flowcharts described in and / or by Fig. 9 Any of the aspects of the communication process 900 performed by the second wireless device.

[0179] The means may be a TR component 199 or 198 of the network entity 1602 configured to perform the functions recited by the means. As described above, the network entity 1602 may include the TX processor 416, the RX processor 470, and the controller / processor 475. Thus, in one configuration, the means may be the TX processor 416, the RX processor 470, and / or the controller / processor 475 configured to perform the functions recited by the means.

[0180] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is merely an illustration of the exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged based on design preferences. Further, some blocks can be combined or omitted. The attached method claims provide the elements of the various blocks in a sample order, but are not limited to the specific order or hierarchy presented.

[0181] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not limited to the various aspects described herein, but should be given the full scope consistent with the language claims. Unless otherwise specified, reference to an element in the singular form does not mean "one and only one", but "one or more". Terms such as "if", "when" and "while" do not mean a direct temporal relationship or reaction. That is, these phrases, such as "when ......", do not mean an immediate action in response to the occurrence of an action or during the occurrence of an action, but simply imply that if the conditions are met, the action will occur, but no specific or immediate time limit is required for the occurrence of the action. The word "exemplary" is used herein to mean "used as an example, instance, or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or having advantages over other aspects. Unless otherwise specified, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may contain one or more members of A, B, or C. A set should be interpreted as a set of elements, where the number of elements is one or more. Thus, for a set of X, X will include one or more elements. When at least one processor is configured to perform a set of functions, the at least one processor is configured to perform the set of functions, either individually or in any combination. Thus, each of the at least one processor may be configured to perform a specific subset of the set of functions, where the subset is the complete set, a proper subset of the set, or an empty subset of the set. If a first device receives data from or sends data to a second device, the data may be received / sent directly between the first device and the second device, or indirectly between the first device and the second device through a set of devices. A device configured to "output" data or other information or instructions (such as a transmission, signal, or message) may, for example, send the data, instructions, or information using a transceiver, or may transmit the data or other information to a device that sends the data or information.A device configured to "obtain" data or other information (such as transmission, signal or message) may, for example, receive data with a transceiver, or may obtain the data from a device that receives the data or other information. The information stored in the memory includes instructions and / or data. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or will later be known to a person of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims. Words such as "module", "mechanism", "element", "device" cannot replace the word "component". Therefore, no claim element will be understood as a component plus function unless the element is explicitly stated using the phrase "component for..."

[0182] As used herein, the phrase "based on" should not be interpreted as referring to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, a condition, a factor, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0183] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0184] Aspect 1 is a method for wireless communication at a first wireless device, comprising: outputting a first indication of a TR position set associated with a communication channel to a second wireless device, the TR position set being selected based on an estimate of the corresponding channel, the first indication of the TR position set comprising at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI reference signal for TR; and outputting communications to the second wireless device based on the first indication of the TR position set, the communications comprising a first data tone set and a second reserved tone set in the same symbol.

[0185] In aspect 2, the method according to aspect 1 further comprises the first indication of the TR position set being output via RRC signaling and comprising one or more subcarrier bitmaps.

[0186] In aspect 3, the method according to aspect 2 further comprises outputting a second indication of activation of the set of TR positions to the second wireless device.

[0187] In aspect 4, the method according to aspect 3 further includes the second indication being output via DCI.

[0188] In aspect 5, the method according to any one of aspects 2 to 4 further includes each of the one or more subcarrier bitmaps indicating a pattern of TR positions of time slots.

[0189] In aspect 6, the method according to aspect 5 further includes each subcarrier bitmap bit corresponding to a subcarrier of the time slot.

[0190] In aspect 7, the method according to aspect 5 further comprises each subcarrier bitmap bit corresponding to an SCG including N subcarriers, N being an integer greater than one.

[0191] In aspect 8, the method according to aspect 1 also includes the first indication of the TR position set being output via DCI and including one or more subcarrier RIVs.

[0192] In aspect 9, the method according to aspect 8 also includes each of the one or more subcarriers RIV corresponding to a SCG including N subcarriers, N being an integer greater than or equal to one.

[0193] In aspect 10, the method according to aspect 8 or 9 further comprises each of the one or more subcarrier RIVs corresponding to a coded value indicating a starting subcarrier and a subcarrier length.

[0194] In aspect 11, the method according to aspect 9 also includes the DCI including a cumulative number of subcarrier RIVs per SCG.

[0195] In aspect 12, the method according to aspect 1 further includes the first indication of the set of TR positions being output via the CSI reference signal for the TR and corresponding to a pattern of physical resources allocated to the CSI reference signal for the TR.

[0196] In aspect 13, the method according to aspect 12 further comprises outputting to the second wireless device a configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources.

[0197] In aspect 14, the method according to aspect 13 also includes the configuration indicating a first CSI reference signal set of a first pattern mapped to a first physical resource, for a first subcarrier, the first pattern of the first physical resource occupies less than all symbols of the time slot, and the configuration indicating a second CSI reference signal set of a second pattern mapped to a second physical resource, for a second subcarrier, the second pattern of the second physical resource occupies all of the symbols of the time slot.

[0198] In aspect 15, the method according to aspect 13 also includes the configuration indicating a CSI reference signal set of a first pattern mapped to a first physical resource, and the configuration includes a second indication indicating whether the corresponding pattern of the physical resource extends to all symbols of a time slot of a subcarrier.

[0199] In aspect 16, the method according to any one of aspects 12 to 15 further comprises the pattern of the physical resources comprising a starting resource block indicator of a time slot and an indicator of a number of resource blocks spanned by the CSI reference signal.

[0200] In aspect 17, the method according to aspect 16 further comprises the starting resource block indicator and the resource block number indicator each corresponding to a multiple of one resource block.

[0201] In aspect 18, the method according to any one of aspects 1 to 17 further comprises selecting a set of TR positions associated with a communication channel, the set of TR positions being selected based on an estimate of the associated channel.

[0202] Aspect 19 is an apparatus for wireless communication at a first wireless device, comprising means for performing a method according to any one of aspects 1 to 18.

[0203] Aspect 20 is an apparatus for wireless communication at a first wireless device, comprising: a memory; and at least one processor coupled to the memory and configured to perform the method according to any one of aspects 1 to 18.

[0204] Aspect 21 is an apparatus for wireless communication at a first wireless device, comprising: at least one memory; and at least one processor, the at least one processor being coupled to the at least one memory, and being configured, alone or in any combination, to cause the first wireless device to perform a method according to any one of Aspects 1 to 18 based at least in part on information stored in the at least one memory.

[0205] Aspect 22 is an apparatus for wireless communication at a first wireless device, comprising: one or more memories; one or more processors, the one or more processors being coupled to the one or more memories, and based at least in part on information stored in the one or more memories, the one or more processors being operable individually or in any combination to cause the first wireless device to perform a method as described in any one of Aspects 1 to 18.

[0206] Aspect 23 is an apparatus for wireless communication at a first wireless device, comprising: one or more memories; one or more processors, the one or more processors being coupled to the one or more memories and operable individually or in any combination to cause the first wireless device to perform a method according to any one of Aspects 1 to 18.

[0207] Aspect 24 is an apparatus for wireless communication at a first wireless device, comprising: a processing system, the processing system comprising a processor circuit and a memory circuit, the memory circuit storing code and coupled to the processor circuit, the processing system being configured to cause the first wireless device to perform a method according to any one of Aspects 1 to 18.

[0208] Aspect 25 is an apparatus according to any one of aspects 19 to 24, further comprising at least one antenna or at least one transceiver.

[0209] Aspect 26 is a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer-executable code at a first wireless device, which, when executed by at least one processor, causes the first wireless device to perform a method according to any one of Aspects 1 to 18.

[0210] Aspect 27 is a method for performing wireless communications at a second wireless device, comprising: receiving a first indication of a TR position set associated with a communication channel from a first wireless device, the first indication of the TR position set comprising at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier RIV, or a CSI reference signal for TR; receiving communications comprising one or more data tones and one or more reserved tones in the same symbol; and decoding the communications based on the TR position set.

[0211] In aspect 28, the method of aspect 27 further comprises performing rate matching around the one or more reserved tones based on the first indication of the set of TR positions.

[0212] In aspect 29, the method according to aspect 27 or aspect 26 further comprises the first indication of the TR position set being received via RRC signaling and comprising one or more subcarrier bitmaps.

[0213] In aspect 30, the method of aspect 29 further comprises receiving a second indication of activation of the set of TR positions from the first wireless device.

[0214] In aspect 31, the method according to aspect 30 further comprises the second indication being received via DCI.

[0215] In aspect 32, the method according to aspect 29 further comprises each of the one or more subcarrier bitmaps indicating a pattern of TR positions of time slots.

[0216] In aspect 33, the method according to aspect 32 further comprises each subcarrier bitmap bit corresponding to a subcarrier of the time slot.

[0217] In aspect 34, the method according to aspect 32 further includes each subcarrier bitmap bit corresponding to an SCG including N subcarriers, N being an integer greater than or equal to one.

[0218] In aspect 35, the method according to aspect 27 or 28 further comprises the first indication of the set of TR positions being received via DCI and comprising one or more subcarrier RIVs.

[0219] In aspect 36, the method according to aspect 35 also includes each of the one or more subcarriers RIV corresponding to a SCG including N subcarriers, N being an integer greater than one.

[0220] In aspect 37, the method according to aspect 36 also includes each of the one or more sub-carrier RIVs corresponding to a coded value indicating a starting sub-carrier and a sub-carrier length.

[0221] In aspect 38, the method according to aspect 36 also includes the DCI including a cumulative number of subcarrier RIVs per SCG.

[0222] In aspect 39, the method according to aspect 27 or 28 also includes the first indication of the set of TR positions being received via the CSI reference signal for the TR and corresponding to a pattern of physical resources allocated to the CSI reference signal for the TR.

[0223] In aspect 40, the method of aspect 39 further comprises receiving, from the first wireless device, a configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources.

[0224] In aspect 41, the method according to aspect 40 also includes the configuration indicating a first CSI reference signal set of a first pattern mapped to a first physical resource, for a first subcarrier, the first pattern of the first physical resource occupies less than all symbols of the time slot, and the configuration indicating a second CSI reference signal set of a second pattern mapped to a second physical resource, for a second subcarrier, the second pattern of the second physical resource occupies all of the symbols of the time slot.

[0225] In aspect 42, the method according to aspect 40 also includes the configuration indicating a set of CSI reference signals of a first pattern mapped to a first physical resource, and the configuration includes a second indication indicating whether the corresponding pattern of the physical resource extends to all symbols of a time slot of a subcarrier.

[0226] In aspect 43, the method according to aspect 29 further comprises the pattern of the physical resources comprising an indicator of a starting resource block of a time slot and an indicator of a number of resource blocks spanned by the CSI reference signal.

[0227] In aspect 44, the method according to aspect 43 further comprises the starting resource block indicator and the resource block number indicator each corresponding to a multiple of one resource block.

[0228] Aspect 45 is an apparatus for wireless communication at a second wireless device, comprising means for performing a method according to any one of aspects 27 to 44.

[0229] Aspect 46 is an apparatus for wireless communication at a second wireless device, comprising: a memory; and at least one processor, the at least one processor coupled to the memory and configured to perform a method according to any one of aspects 27 to 44.

[0230] Aspect 47 is an apparatus for wireless communication at a second wireless device, comprising: at least one memory; and at least one processor, the at least one processor being coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor being configured, alone or in any combination, to cause the second wireless device to perform a method according to any one of Aspects 27 to 44.

[0231] Aspect 48 is an apparatus for wireless communication at a second wireless device, comprising: one or more memories; one or more processors, the one or more processors being coupled to the one or more memories, and based at least in part on information stored in the one or more memories, the one or more processors being operable individually or in any combination to cause the second wireless device to perform a method as described in any one of Aspects 27 to 44.

[0232] Aspect 49 is an apparatus for wireless communication at a second wireless device, comprising: one or more memories; one or more processors, the one or more processors being coupled to the one or more memories and operable individually or in any combination to cause the second wireless device to perform a method as described in any one of Aspects 27 to 44.

[0233] Aspect 50 is an apparatus for wireless communication at a second wireless device, comprising: a processing system, the processing system comprising a processor circuit and a memory circuit, the memory circuit storing code and coupled to the processor circuit, the processing system being configured to cause the second wireless device to perform a method according to any one of aspects 27 to 44.

[0234] Aspect 51 is an apparatus according to any one of aspects 45 to 50, further comprising at least one antenna or at least one transceiver.

[0235] Aspect 52 is a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer-executable code at a second wireless device, which, when executed by one or more processors, causes the second wireless device to perform a method according to any one of Aspects 27 to 44.

Claims

1. An apparatus for wireless communication at a first wireless device, the apparatus comprising: at least one memory; and at least one processor coupled to the memory and, based at least in part on information stored in the at least one memory, configured, alone or in any combination, to cause the first wireless device to: outputting to a second wireless device a first indication of a tone reservation (TR) position set associated with a communication channel, the TR position set selected based on an estimate of the associated communication channel, and the first indication of the TR position set comprising at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier resource indicator value (RIV), or a channel state information (CSI) reference signal for the TR; as well as A communication is output for the second wireless device based on the first indication of the set of TR positions, the communication comprising a first set of data tones and a second set of reserved tones in a same symbol.

2. The apparatus of claim 1, wherein the first indication of the set of TR positions is included in radio resource control (RRC) signaling and comprises one or more subcarrier bitmaps.

3. The device according to claim 2, further comprising: at least one antenna, the at least one antenna coupled to the at least one processor, wherein the at least one processor is further configured to: A second indication of activation of the set of TR positions is outputted to the second wireless device via the at least one antenna.

4. The apparatus of claim 3, wherein the first wireless device is a network entity and the second wireless device is a user equipment (UE), and wherein the second indication is included in downlink control information (DCI).

5. The apparatus of claim 2, wherein each of the one or more subcarrier bitmaps indicates a pattern of TR positions of a time slot.

6. The apparatus of claim 5, wherein each subcarrier bitmap bit corresponds to one subcarrier of the time slot, or each subcarrier bitmap bit corresponds to a subcarrier group (SCG) including N subcarriers, N being an integer greater than one.

7. An apparatus according to claim 1, wherein the communication channel corresponds to a downlink channel and the associated communication channel corresponds to an uplink channel, and wherein the first indication of the TR position set is included in downlink control information (DCI) and includes one or more subcarriers RIV.

8. The apparatus of claim 7, wherein each of the one or more subcarriers RIV corresponds to a subcarrier group (SCG) including N subcarriers, N being an integer greater than or equal to one.

9. The apparatus of claim 8, wherein each of the one or more subcarrier RIVs corresponds to a coded value indicating a starting subcarrier and a subcarrier length.

10. The apparatus of claim 8, wherein the DCI comprises a cumulative number of subcarrier RIVs per SCG.

11. The apparatus of claim 1, wherein the first indication of the set of TR positions is included in the CSI reference signal for the TR and corresponds to a pattern of physical resources allocated to the CSI reference signal for the TR.

12. The apparatus of claim 11, wherein the at least one processor is further configured to cause the first wireless device to: A configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources is outputted for the second wireless device.

13. The apparatus of claim 12, wherein the configuration indicates a first set of CSI reference signals mapped to a first pattern of a first physical resource, the first pattern of the first physical resource occupying less than all symbols of a time slot for a first subcarrier, and the configuration indicates a second set of CSI reference signals mapped to a second pattern of a second physical resource, the second pattern of the second physical resource occupying all of the symbols of the time slot for a second subcarrier.

14. The apparatus of claim 12, wherein the configuration indicates a set of CSI reference signals of a first pattern mapped to a first physical resource, and the configuration comprises a second indication indicating whether the corresponding pattern of the physical resource extends to all symbols of a time slot of a subcarrier.

15. The apparatus of claim 11, wherein the pattern of the physical resources comprises a starting resource block indicator of a time slot and an indicator of the number of resource blocks spanned by the CSI reference signal, wherein the starting resource block indicator and the indicator of the number of resource blocks each correspond to a multiple of one resource block.

16. An apparatus for wireless communication at a second wireless device, the apparatus comprising: at least one memory; and at least one processor coupled to the memory and, based at least in part on information stored in the at least one memory, configured, alone or in any combination, to cause the second wireless device to: receiving, from a first wireless device, a first indication of a set of tone reservation (TR) positions associated with a communication channel, The first indication of the set of TR positions comprises at least one of a subcarrier bitmap, a granularity of the subcarrier bitmap, a subcarrier resource indicator value (RIV), or a channel state information (CSI) reference signal for TR; receiving a communication including one or more data tones and one or more reserved tones in the same symbol; as well as The communication is decoded based on the set of TR positions.

17. The apparatus of claim 16, wherein to decode the communication, the at least one processor is further configured to cause the second wireless device to: Rate matching is performed around the one or more reserved tones based on the first indication of the set of TR positions.

18. The apparatus of claim 16, wherein the first indication of the set of TR positions is included in radio resource control (RRC) signaling and comprises one or more subcarrier bitmaps.

19. The apparatus according to claim 18, further comprising: at least one antenna coupled to the at least one processor, wherein the at least one processor is further configured to cause the second wireless device to: A second indication of activation of the set of TR positions is received from the first wireless device and via the at least one antenna, wherein the second indication is included in downlink control information (DCI).

20. The apparatus of claim 18, wherein each of the one or more subcarrier bitmaps indicates a pattern of TR positions of a time slot, wherein each subcarrier bitmap bit corresponds to one subcarrier of the time slot.

21. The apparatus of claim 20, wherein each subcarrier bitmap bit corresponds to a subcarrier group (SCG) including N subcarriers, N being an integer greater than or equal to one.

22. The apparatus of claim 16, wherein the first wireless device is a network entity and the second wireless device is a user equipment (UE), and wherein the first indication of the set of TR positions is included in downlink control information (DCI) and includes one or more subcarrier RIVs.

23. The apparatus of claim 22, wherein each of the one or more subcarriers RIV corresponds to a subcarrier group (SCG) including N subcarriers, N being an integer greater than one.

24. The apparatus of claim 23, wherein each of the one or more subcarrier RIVs corresponds to a coded value indicating a starting subcarrier and a subcarrier length.

25. The apparatus of claim 23, wherein the DCI comprises a cumulative number of subcarrier RIVs per SCG.

26. The apparatus of claim 16, wherein the first indication of the set of TR positions is included in the CSI reference signal for the TR and corresponds to a pattern of physical resources allocated to the CSI reference signal for the TR.

27. The apparatus of claim 26, wherein the at least one processor is further configured to cause the second wireless device to: A configuration of a pattern for mapping one or more CSI reference signals to corresponding physical resources is received from the first wireless device.

28. The apparatus of claim 27, wherein the configuration indicates a first set of CSI reference signals mapped to a first pattern of a first physical resource, wherein for a first subcarrier, the first pattern of the first physical resource occupies less than all symbols of a time slot, and the configuration indicates a second set of CSI reference signals mapped to a second pattern of a second physical resource, wherein for a second subcarrier, the second pattern of the second physical resource occupies all of the symbols of the time slot.

29. The apparatus of claim 27, wherein the configuration indicates a set of CSI reference signals of a first pattern mapped to a first physical resource, and the configuration comprises a second indication indicating whether the corresponding pattern of the physical resource extends to all symbols of a time slot of a subcarrier.

30. The apparatus of claim 26, wherein the pattern of the physical resources comprises a starting resource block indicator of a time slot and an indicator of a number of resource blocks spanned by the CSI reference signal, wherein the starting resource block indicator and the indicator of the number of resource blocks each correspond to a multiple of one resource block.

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