Enhanced PTRS for phase noise suppression

Abstract

For example, an apparatus may be a wireless device configured to: transmit, for a network device, a first indication that maps each of a plurality of residual integrated phase noise powers (RIPNPs) to a corresponding number of subcarriers; receiving a second indication of a number of subcarriers including a phase tracking reference signal (PTRS) based on the first indication; receiving, via one or more symbols, a transmission including the data signal and the PTRS on the number of subcarriers indicated in the second indication; and performing demodulation of the data signal using the PTRS-based phase noise estimation. The apparatus may be a network device configured to: obtain a first indication from a wireless device; outputting a second indication based on the first indication; and transmitting a transmission comprising the data signal and the PTRS via the one or more symbols.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of U.S. non-provisional patent application No. 18 / 477,448, filed on September 28, 2023, entitled “ENHANCED PTRS FOR MITIGATION OFPHASE NOISE”, the entire contents of which are expressly incorporated herein by reference. Technical Field

[0003] This disclosure relates generally to communication systems, and more specifically to general noise suppression, and even more specifically to wireless communication including a reference signal for noise suppression. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. 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, 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 telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the city, national, regional, and even global levels. An example telecommunications standard is 5G New Radio (NR). 5G NR is part of the Continuous Evolution of Mobile Broadband (CEM) program issued by the 3rd 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). Some aspects of 5G NR can be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. Furthermore, these improvements can also be applied to other multiple access technologies and telecommunications standards that adopt these technologies. Summary of the Invention

[0006] The following is a simplified summary of one or more aspects to provide a basic understanding of these aspects. This summary is not a comprehensive overview of all conceived aspects. It neither identifies key or essential elements of all aspects nor describes 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 the more detailed descriptions that follow.

[0007] For higher-order modulation schemes, phase noise (e.g., which may be referred to as PN) can represent a significant component of the total noise in the downlink signal received at the wireless device (e.g., UE). In some respects, the impact of phase noise increases with increasing carrier frequency. Additionally, demodulation of higher-order constellations can be based on higher operating signal-to-noise ratios (SNR), and phase noise reduces the ability to demodulate such higher-order constellations. Phase tracking reference signals (PTRS) incur significant overhead, which reduces throughput. The aspects presented in this paper provide more efficient PTRS, which also reduces the complexity of estimation and cancellation at the receiver. This reduced complexity provides power savings and reduces demodulation latency.

[0008] In one aspect of this disclosure, a method, computer-readable medium, and apparatus are provided. The apparatus may be a wireless device configured to: transmit to a network device a first indication mapping each of a plurality of residual integrated phase noise powers (RIPNPs) to a corresponding number of subcarriers; receive, based on the first indication, a second indication of the number of subcarriers including a phase tracking reference signal (PTRS); receive, via one or more symbols, a transmission including a data signal and the PTRS on the number of subcarriers indicated in the second indication; and perform demodulation of the data signal using a phase noise estimation based on the PTRS.

[0009] In one aspect of this disclosure, a method, computer-readable medium, and apparatus are provided. The apparatus may be a network device configured to: obtain from a wireless device a first indication of the number of subcarriers corresponding to each of a plurality of RIPNPs; output a second indication of the number of subcarriers including PTRS based on the first indication; and transmit via one or more symbols a data signal and the PTRS on the number of subcarriers indicated in the second indication.

[0010] To achieve the foregoing and related objectives, one or more aspects may include the features fully described below and specifically pointed out in the claims. The following description and drawings set forth some exemplary features of one or more aspects in detail. However, these features indicate only a few of the various ways in which the principles of the various aspects may be employed. Attached Figure Description

[0011] Figure 1 This is a diagram illustrating an example of a wireless communication system and an access network.

[0012] Figure 2A This is an illustration of an example of the first frame according to various aspects of this disclosure.

[0013] Figure 2B This is a diagram illustrating examples of downlink (DL) channels within a subframe according to various aspects of this disclosure.

[0014] Figure 2C This is an illustration of an example of a second frame according to various aspects of this disclosure.

[0015] Figure 2D This is a diagram illustrating examples of uplink (UL) channels within a subframe according to various aspects of this disclosure.

[0016] Figure 3 This is a diagram illustrating examples of base stations and user equipment (UEs) in an access network.

[0017] Figure 4 This includes a first graph illustrating phase noise power as a function of frequency offset relative to the associated carrier frequency, and a second graph illustrating phase noise power as a function of subcarriers used to carry a specific SCS for a PTRS.

[0018] Figure 5 Includes charts similar to graphs and tables illustrating the number of taps and / or subcarriers corresponding to each of the multiple threshold SNR values ​​for a particular wireless device.

[0019] Figure 6 This is a call flowchart illustrating a method for allocating PTRS resources for wireless communication.

[0020] Figure 7 This is a flowchart of a wireless communication method.

[0021] Figure 8 This is a flowchart of a wireless communication method.

[0022] Figure 9 This is a flowchart of a wireless communication method.

[0023] Figure 10 This is a flowchart of a wireless communication method.

[0024] Figure 11 This is a diagram illustrating an example of the hardware implementation of the device.

[0025] Figure 12This is a diagram illustrating an example of the hardware implementation of a network entity. Detailed Implementation

[0026] For higher-order modulation schemes, phase noise (e.g., which may be referred to as PN) can represent a significant component of the total noise in the downlink signal received at a wireless device (e.g., a UE). In some respects, the impact of phase noise increases with increasing carrier frequency. For example, in some respects, because phase noise is generated by asynchronous phase-locked loops (PLLs), the inaccurate timing of the PLL (e.g., asynchronous) becomes more dominant relative to the carrier or the frequency used as the frequency increases. Phase noise suppression at a wireless device configured for lower-order modulation (e.g., quadrature amplitude modulation (QAM) up to 256-QAM) may be insufficient for higher-order modulation (e.g., 4K-QAM or 16K-QAM). To achieve demodulation of such higher-order constellations, the operating signal-to-noise ratio (SNR) should be very high. Therefore, in some respects, if phase noise remains untreated, it may become a limiting noise floor, and wireless devices (e.g., receivers) may be configured to cancel or otherwise account for phase noise.

[0027] A first configuration of discontinuous PTRS in the frequency domain (e.g., a PTRS configuration in discontinuous frequency resources, such as including one PTRS in each resource block in the time-frequency domain) may allow for the suppression of constant phase noise (e.g., based on constant phase noise estimation) in some respects. In some respects, phase noise includes a contribution from variations across a wide frequency range around the center (or carrier) frequency, and in a second PTRS configuration, continuous PTRS (in the frequency domain) can be used to estimate the phase noise across that frequency range for phase noise suppression. While a wide frequency range may contribute to phase noise, the contribution tends to decrease at larger frequency offsets, and the results of ignoring those larger frequency offsets (e.g., the maximum power associated with the omitted frequency offset) can be described and / or defined as RIPNP. Therefore, while phase noise estimation (and cancellation) can be improved by considering a larger frequency range (e.g., transmitting PTRS on a larger number of subcarriers), a larger frequency range (e.g., a larger number of subcarriers) may be associated with increased overhead, power consumption, complexity, and delay. Therefore, the frequency range used and / or the number of subcarriers including PTRS can be selected based on threshold phase noise estimation accuracy (e.g., by estimating the threshold of the maximum unidentified phase noise), threshold overhead, threshold power consumption, and / or threshold delay, depending on the characteristics of the communication, the characteristics of the wireless device, or other considerations.

[0028] The detailed descriptions following, illustrated with reference to the accompanying drawings, describe various configurations and do not represent the only configurations in which the concepts described herein can be practiced. To provide a thorough understanding of the various concepts, the detailed descriptions 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.

[0029] Various apparatuses and methods are presented with reference to several aspects of a telecommunications system. These apparatuses and methods are described in detail below and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively, “elements”). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0030] As an example, an element, any part of an element, or any combination of elements may be implemented as a "processing system" including one or more processors. When multiple processors are implemented, the multiple processors may 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, system-on-a-chip (SoCs), baseband processors, field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionalities described throughout this disclosure. One or more processors in the 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 instructions, instruction sets, code, code segments, program code, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, or any combination thereof.

[0031] Therefore, in one or more example aspects, specific implementations, and / or use cases, the described functionality may be implemented in hardware, software, or any combination thereof. If implemented in software, the functionality may be stored or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available medium accessible to 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 disc storage devices, magnetic disk storage devices, 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 accessible to a computer.

[0032] While aspects, implementations, and / or use cases are described herein by way of example, additional or different aspects, implementations, and / or use cases may arise in many different arrangements and scenarios. The aspects, implementations, and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and package arrangements. For example, aspects, implementations, and / or use cases may arise via integrated chip implementations and other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, AI-enabled devices, etc.). While some examples may or may not be specific to a use case or application, the described examples may exhibit broad applicability. Aspects, implementations, and / or use cases can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more of the technologies described herein. In some practical settings, devices incorporating the described aspects and features 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 involve 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 techniques described herein can be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or decomposed components, end-user equipment, etc., of various sizes, shapes, and configurations.

[0033] The deployment of communication systems such as 5G NR systems can be arranged in a variety of ways using various components or parts. In a 5G NR system or network, network nodes, network entities, network mobility elements, radio access network (RAN) nodes, core network nodes, network elements or network equipment (such as base stations (BS)), or one or more units (or components) performing base station functionality can be implemented in aggregated or decomposed architectures. For example, BSs (such as Node B (NB), evolved NB (eNB), NR BS, 5G NB, access point (AP), transmit / receive point (TRP), or cell, etc.) can be implemented as aggregated base stations (also known as standalone BS or monolithic BS) or decomposed base stations.

[0034] Aggregated base stations can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. Decentralized base stations can be configured to utilize a protocol stack that is physically or logically distributed across 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 respects, the CU may be implemented within a RAN node, and one or more DUs may co-located with the CU, or alternatively, may be geographically or virtually distributed across one or more other RAN nodes. DUs may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU may be implemented as a virtual unit, namely a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0035] Base station operation or network design can take into account the aggregation characteristics of base station functionality. For example, decomposed base stations can be utilized in Integrated Access Backhaul (IAB) networks, Open Radio Access Networks (O-RAN (such as network configurations initiated by the O-RAN Alliance)), or Virtualized Radio Access Networks (vRAN, also known as Cloud Radio Access Networks (C-RAN)). Decomposition can include distributing functionality across two or more units in various physical locations, as well as virtually distributing the functionality of at least one unit, which enables flexibility in network design. The various units of a decomposed base station or decomposed RAN architecture can be configured to communicate wirelessly with at least one other unit.

[0036] Figure 1Figure 100 illustrates an example of a wireless communication system and access network. The illustrated wireless communication system includes a decomposed base station architecture. The decomposed base station architecture may include one or more CUs 110, which may communicate directly with the core network 120 via a backhaul link, or indirectly with the core network 120 via one or more decomposed base station units, such as a near real-time (near-RT) RAN Intelligent Controller (RIC) 125 via an E2 link, or a non-real-time (non-RT) RIC 115 associated with a Service Management and Orchestration (SMO) framework 105, or both. CUs 110 may communicate with one or more DUs 130 via a corresponding midhaul link (such as an F1 interface). DUs 130 may communicate with one or more RUs 140 via a corresponding fronthaul link. RUs 140 may communicate with a corresponding UE 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 140.

[0037] Each of the units (i.e., CU 110, DU 130, RU 140, and near-RT RIC 125, non-RT RIC 115, and SMO frame 105) may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via wired or wireless transmission media. Each unit in the unit, or an associated processor or controller providing instructions to the communication interfaces of these units, may be configured to communicate with one or more other units via transmission media. For example, these units may include wired interfaces configured to receive signals or transmit signals to one or more other units via wired transmission media. Additionally, these units may include wireless interfaces that may include receivers, transmitters, or transceivers (such as RF transceivers) configured to receive signals via wireless transmission media and / or transmit signals to one or more other units.

[0038] In some aspects, the CU 110 can host one or more higher-level control functions. Such control functions may include Radio Resource Control (RRC), Packet Data Convergence Protocol (PDCP), Serving Data Adaptation Protocol (SDAP), etc. Each control function can be implemented using an interface configured to signal to other control functions hosted by the CU 110. The CU 110 can 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 implementations, the CU 110 can be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units can communicate bidirectionally with the CU-CP units via an interface such as an E1 interface. The CU 110 can be implemented to communicate with the DU 130 for network control and signaling, as needed.

[0039] DU 130 may correspond to a logic unit that includes one or more base station functions for controlling the operation of one or more RU 140s. In some aspects, DU 130 may at least partially host one or more of the Radio Link Control (RLC) layer, Media 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, demodulation, etc.) according to functional splits (such as those defined by 3GPP). In some aspects, DU 130 may further host one or more low PHY layers. Each layer (or module) may be implemented using an interface configured to communicate signaling with other layers (and modules) hosted by DU 130 or with control functions hosted by CU 110.

[0040] Lower-layer functionality can be implemented by one or more RU 140s. In some deployments, an RU140 controlled by a DU 130 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, or both, based at least in part on functional decomposition (such as lower-layer functional decomposition). In such architectures, the RU 140 may be implemented to handle over-the-air (OTA) communications with one or more UE 104s. In some specific implementations, the real-time and non-real-time aspects of control plane and user plane communications with the RU 140 may be controlled by the corresponding DU 130. In some scenarios, this configuration enables the implementation of the DU 130 and CU 110 in cloud-based RAN architectures such as vRAN architectures.

[0041] SMO framework 105 can be configured to support RAN deployment and provisioning of both non-virtualized and virtualized network elements. For non-virtualized network elements, SMO framework 105 can be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, SMO framework 105 can be configured to interact with a cloud computing platform such as Open Cloud (O-Cloud) 190 to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface such as the O2 interface. Such virtualized network elements may include, but are not limited to, CU 110, DU 130, RU 140, and near-RT RIC 125. In some implementations, SMO framework 105 can communicate with the hardware aspects of the 4G RAN (such as Open eNB (O-eNB) 111) via the O1 interface. Additionally, in some implementations, SMO framework 105 can communicate directly with one or more RU 140s via the O1 interface. SMO framework 105 may also include a non-RT RIC 115 configured to support the functionality of SMO framework 105.

[0042] The non-RT RIC 115 can be configured to include logical functions enabling non-real-time control and optimization of RAN elements and resources, including artificial intelligence (AI) / machine learning (ML) workflows for model training and updates, or policy-based guidance for applications / features in the near-RT RIC 125. The non-RT RIC 115 can be coupled to or communicate with the near-RT RIC 125, such as via an A1 interface. The near-RT RIC 125 can be configured to include logical functions enabling near real-time control and optimization of RAN elements and resources via an interface, such as via an E2 interface, connecting one or more CU 110s, one or more DU 130s, or both, and O-eNBs to the near-RT RIC 125.

[0043] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 125, the non-RT RIC 115 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 125 and may be received from non-network data sources or network functions at the SMO framework 105 or the non-RT RIC 115. In some examples, the non-RT RIC 115 or the near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 115 may monitor long-term trends and patterns in performance and employ AI / ML models to perform corrective actions via the SMO framework 105 (such as reconfiguration via O1) or by creating RAN management policies (such as A1 policies).

[0044] At least one of CU 110, DU 130, and RU 140 may be referred to as base station 102. Therefore, base station 102 may include one or more of CU 110, DU 130, and RU 140 (each component is indicated by a dashed line to indicate that each component may or may not be included in base station 102). Base station 102 provides UE 104 with an access point to core network 120. Base station 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Small cells include femtocells, picocells, and microcells. A network that includes both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include an evolved home node B (eNB) (HeNB), which can provide service to a restricted group referred to as a closed subscriber group (CSG). The communication link between RU 140 and UE 104 may include uplink (UL) transmission (also known as reverse link) from UE 104 to RU 140 and / or downlink (DL) transmission (also known as forward link) transmission from RU 140 to UE 104. The communication link may utilize multiple-input multiple-output (MIMO) antenna techniques, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link may use one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, base station 102 / UE 104 may use a spectrum with a bandwidth of up to Y MHz (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz, etc.). Carriers may be adjacent to each other or may not be adjacent to each other. Carrier allocation may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). Component carriers may include primary component carriers and one or more secondary component carriers. The primary component carrier can be referred to as the primary cell (PCell) and the secondary component carrier can be referred to as the secondary cell (SCell).

[0045] Some UEs 104 can communicate with each other using device-to-device (D2D) communication link 158. D2D communication link 158 can use DL / UL wireless wide area network (WWAN) spectrum. D2D communication link 158 can use one or more sidelink channels, such as Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Shared Channel (PSSCH), and Physical Sidelink Control Channel (PSCCH). D2D communication can be performed through various wireless D2D communication systems, such as Bluetooth. ™ (Bluetooth is a trademark of the Bluetooth Special Interest Group (SIG), and is based on the IEEE 802.11 standard for Wi-Fi.) ™ (Wi-Fi is a trademark of the Wi-Fi Alliance), LTE, or NR.

[0046] The wireless communication system may also include a Wi-Fi AP 150, which communicates with the UE 104 (also referred to as a Wi-Fi station (STA)) via a communication link 154, for example, in an unlicensed spectrum such as 5 GHz. When communicating in unlicensed spectrum, the UE 104 / AP 150 may perform a free channel assessment (CCA) to determine whether the channel is available before communication.

[0047] 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 designated as frequency ranges FR1 (410MHz to 7.125GHz) and FR2 (24.25GHz to 52.6GHz). Although a portion of FR1 is greater than 6GHz, in various documents and articles, FR1 is often (interchangeably) referred to as the "sub-6GHz" band. Similar naming issues sometimes occur with FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although this is distinct from the Extremely High Frequency (EHF) band (30GHz to 300GHz) designated as "millimeter wave" by the International Telecommunication Union (ITU).

[0048] The frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR studies have designated the operating bands for these mid-band frequencies as the frequency range designation FR3 (7.125 GHz to 24.25 GHz). Bands falling within FR3 can inherit FR1 and / or FR2 characteristics, thus effectively extending the features of FR1 and / or FR2 to mid-band frequencies. Additionally, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been designated as the frequency range designations FR2-2 (52.6 GHz to 71 GHz), FR4 (71 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher bands falls within the EHF band.

[0049] In view of the above, unless otherwise specifically stated, the term "below 6 GHz" as used herein can broadly refer to frequencies less than 6 GHz, within FR1, or including intermediate frequency band frequencies. Furthermore, unless otherwise specifically stated, the term "millimeter wave" as used herein can broadly refer to frequencies that can include intermediate frequency band frequencies, within FR2, FR4, FR2-2 and / or FR5, or within the EHF band.

[0050] Base station 102 and UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming. Base station 102 may transmit beamformed signals 182 to UE 104 in one or more transmit directions. UE 104 may receive beamformed signals from base station 102 in one or more receive directions. UE 104 may also transmit beamformed signals 184 to base station 102 in one or more transmit directions. Base station 102 may receive beamformed signals from UE 104 in one or more receive directions. Base station 102 / UE 104 may perform beamforming training to determine the optimal receive and transmit directions for each of base station 102 / UE 104. The transmit and receive directions of base station 102 may be the same or different. The transmit and receive directions of UE 104 may be the same or different.

[0051] Base station 102 may include and / or be referred to as gNB, Node B, eNB, access point, transceiver base station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), TRP, network node, network entity, network equipment, or some other suitable terminology. Base station 102 may be implemented as an integrated access and backhaul (IAB) node, relay node, sidelink node, aggregated (monolithic) base station with baseband units (BBU) (including CU and DU) and RU, or may be implemented as a decomposed base station including one or more of CU, DU, and / or RU. A collection of base stations that may include decomposed base stations and / or aggregated base stations may be referred to as Next Generation (NG) RAN (NG-RAN).

[0052] The core network 120 may include Access and Mobility Management Function (AMF) 161, Session Management Function (SMF) 162, User Plane Function (UPF) 163, Unified Data Management (UDM) 164, one or more location servers 168, and other functional entities. AMF 161 is the control node that handles signaling between UE 104 and the core network 120. AMF 161 supports registration management, connection management, mobility management, and other functions. SMF 162 supports session management and other functions. UPF 163 supports packet routing, packet forwarding, and other functions. UDM 164 supports authentication and key agreement (AKA) credential generation, user identity processing, access authorization, and subscription management. One or more location servers 168 are exemplified as including a Gateway Mobile Location Center (GMLC) 165 and a Location Management Function (LMF) 166. However, generally, one or more location servers 168 may include one or more location / positioning servers, which may include one or more of GMLC 165, LMF 166, Position Determination Entity (PDE), Serving Mobile Location Center (SMLC), Mobile Location Center (MPC), etc. GMLC 165 and LMF 166 support UE location services. GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE location information. LMF 166 receives measurement and auxiliary information from NG-RAN and UE 104 via AMF 161 to calculate the location of UE 104. NG-RAN may use one or more positioning methods to determine the location of UE 104. Positioning UE 104 may involve signal measurement, location estimation, and optional speed calculation based on these measurements. Signal measurement may be performed by UE 104 and / or base station 102 serving UE 104. The measured signals may be based on one or more of the following systems / signals / sensors: Satellite Positioning System (SPS) 170 (e.g., one or more of Global Navigation Satellite System (GNSS), Global Positioning System (GPS), Non-Terrestrial Network (NTN) or other position / location systems), LTE signals, Wireless Local Area Network (WLAN) signals, Bluetooth signals, Terrestrial Beacon System (TBS), sensor-based information (e.g., barometric pressure sensor, motion sensor), NR Enhanced Cell ID (NR E-CID) method, NR signals (e.g., multiple round-trip time (multiple RTT), DL departure angle (DL-AoD), DL time difference of arrival (DL-TDOA), UL time difference of arrival (UL-TDOA), and UL angle of arrival (UL-AoA) positioning) and / or other systems / signals / sensors.

[0053] Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, GPS devices, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional device. Some UEs in UE 104 may be referred to as IoT devices (e.g., parking meters, air 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, mobile phone, user agent, mobile client, client, or some other suitable terminology. In some scenarios, the term UE may also be applied to one or more companion devices, such as in a device constellation arrangement. One or more of these devices may access the network together and / or individually.

[0054] Refer again Figure 1 In some aspects, UE 104 may have a PTRS mask reporting component 198, which is configured to: send a first indication to the network device of a corresponding number of RIPNPs mapped to subcarriers; receive a second indication based on the first indication of the number of subcarriers including PTRS; receive, via one or more symbols, a transmission including a data signal and the PTRS on the number of subcarriers indicated in the second indication; and perform demodulation of the data signal using phase noise estimation based on the PTRS. In some aspects, base station 102 may have a PTRS BW allocation component 199, which is configured to: obtain from the radio device a first indication of a corresponding number of RIPNPs mapped to subcarriers of a plurality of RIPNPs; output a second indication based on the first indication of the number of subcarriers including PTRS; and transmit, via one or more symbols, a transmission including a data signal and the PTRS on the number of subcarriers indicated in the second indication. While 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, and other wireless technologies.

[0055] Figure 2A Figure 200 illustrates an example of the first subframe within a 5G NR frame structure. Figure 2B Figure 230 illustrates an example of a DL channel within a 5G NR subframe. Figure 2CFigure 250 is an example of a second subframe within a 5G NR frame structure. Figure 2D Figure 280 illustrates an example of a UL channel within a 5G NR subframe. The 5G NR frame structure can be Frequency Division Duplex (FDD) (where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to either DL or UL), or Time Division Duplex (TDD) (where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to both DL and UL). Figure 2A , Figure 2C In the provided example, 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 can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are both DL and UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The slot format is configured for the UE via the 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.

[0056] Figures 2A to 2D The frame structure is illustrated, and aspects of this disclosure are applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10 ms) can be divided into 10 equal-sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include micro-time slots, 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 normal CP, each time slot may include 14 symbols, and for extended CP, each time slot may include 12 symbols. Symbols on the DL may be CP Orthogonal Frequency Division Multiplexing (OFDM) (CP-OFDM) symbols. Symbols on the UL may be CP-OFDM symbols (for high-throughput scenarios) or Discrete Fourier Transform (DFT) Extended OFDM (DFT-s-OFDM) symbols (for power-constrained scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the CP and a parameter set. The parameter set defines the subcarrier spacing (SCS) (see Table 1). The symbol length / duration can be scaled by 1 / SCS.

[0057]

[0058] Table 1: Parameter Set, SCS, and CP

[0059] For a normal CP (14 symbols / slot), different parameter sets µ 0 through 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For an extended CP, parameter set 2 allows 4 slots per subframe. Therefore, for a normal CP and parameter set µ, there are 14 symbols / slot and 2... µ One time slot / subframe. Subcarrier spacing can be equal to ,in The parameter sets are 0 to 4. Therefore, the subcarrier spacing is 15 kHz for parameter set µ=0 and 240 kHz for parameter set µ=4. The symbol length / duration is negatively correlated with the subcarrier spacing. Figures 2A to 2D Examples of a normal frequency division multiplexing (CP) with 14 symbols per time slot and a parameter set of µ=2 with 4 time slots per subframe are provided. The time slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within the frame set, there may be one or more distinct bandwidth portions (BWPs) of frequency division multiplexing (see [link to relevant documentation]). Figure 2B Each BWP can have a specific set of parameters and CP (normal or extended).

[0060] A resource grid can be used to represent the frame structure. Each time slot consists of a resource block (RB) extending for 12 consecutive subcarriers (also known as a physical RB (PRB)). The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0061] like Figure 2A As illustrated, some REs carry reference (pilot) signals (RS) for the UE. RS may include demodulation RS (DM-RS) (indicated as R for a particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. RS may also include beam measurement RS (BRS), beam refinement RS (BRRS), and phase tracking RS (PT-RS).

[0062] Figure 2BExamples of various DL channels within a subframe of a frame are illustrated. The Physical Downlink Control Channel (PDCCH) carries the DCI within one or more Control Channel Elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE comprising six RE Groups (REGs), each REG comprising 12 consecutive REs in the OFDM symbol of the RB. A PDCCH within a BWP can 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 PDCCH monitoring timing on the CORESET, where 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. The Primary Synchronization Signal (PSS) may be located within symbol 2 of a specific subframe of the frame. The PSS is used by the UE 104 to determine subframe / symbol timing and physical layer identification. The Secondary Synchronization Signal (SSS) may be located within symbol 4 of a specific subframe of the frame. The SSS is used by the UE to determine the Physical Layer Cell Identifier Group Number and radio frame timing. Based on the Physical Layer Identifier and the Physical Layer Cell Identifier 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 known as an SS block (SSB)). The MIB provides the System Frame Number (SFN) and the number of Restricted Blocks (RBs) in the system bandwidth. The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted via the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0063] like Figure 2C As illustrated, some REs in the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE can transmit DM-RS for the Physical Uplink Control Channel (PUCCH) and DM-RS for the Physical Uplink Shared Channel (PUSCH). The PUSCH DM-RS can be transmitted in the first or first two symbols of the PUSCH. Depending on whether a short or long PUCCH is transmitted and depending on the specific PUCCH format used, the PUCCH DM-RS can be transmitted in different configurations. The UE can transmit a Sounding Reference Signal (SRS). The SRS can be transmitted in the last symbol of a subframe. The SRS can have a comb structure, and the UE can transmit the SRS on one of the comb teeth. The SRS can be used by the base station for channel quality estimation to enable frequency-dependent scheduling of the UL.

[0064] Figure 2DExamples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), pre-decoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgment (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUCCH carries data and may additionally be used to carry buffer status reports (BSR), power clearance reports (PHR), and / or UCIs.

[0065] Figure 3 This is a block diagram illustrating communication between base station 310 and UE 350 in the access network. In the DL, Internet Protocol (IP) packets can be provided to controller / processor 375. Controller / processor 375 implements Layer 3 and Layer 2 functionality. Layer 3 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Service Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and Media Access Control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting 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 the delivery of upper-layer packet data units (PDUs), error correction via ARQ, concatenation, segmentation, and reassembly of RLC service data units (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 transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel priority ordering.

[0066] Transmit (TX) processor 316 and receive (RX) processor 370 implement Layer 1 functionality associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transport channel, forward error correction (FEC) decoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. TX processor 316 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. Each stream can then be mapped to OFDM subcarriers, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domains, and subsequently combined using inverse fast Fourier transform (IFFT) to produce a physical channel carrying a stream of time-domain OFDM symbols. The OFDM stream undergoes spatial pre-decoding to generate multiple spatial streams. A channel estimate from channel estimator 374 can be used to determine the decoding and modulation scheme, as well as for spatial processing. This channel estimate can be derived from a reference signal transmitted by UE 350 and / or channel condition feedback. Each spatial stream can then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx can use the corresponding spatial stream to modulate a radio frequency (RF) carrier for transmission.

[0067] At UE 350, each receiver 354Rx receives signals via its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides that information to the receive (RX) processor 356. The TX processor 368 and RX processor 356 implement Layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for UE 350. If multiple spatial streams are destined for UE 350, the RX processor 356 can combine them into a single OFDM symbol stream. The RX processor 356 then uses a Fast Fourier Transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal consists of a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, along with the reference signal, are recovered and demodulated by determining the most probable signal constellation points transmitted by base station 310. These soft decisions can be based on a channel estimate calculated by channel estimator 358. Subsequently, the soft decision is decoded and deinterleaved to recover the data and control signals originally transmitted by base station 310 on the physical channel. The data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functionality.

[0068] The controller / processor 359 may be associated with at least one memory 360 storing program code and data. The at least one memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operation.

[0069] Similar to the functionality described in conjunction with DL transmission performed by base station 310, controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connectivity, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with upper-layer PDU delivery, error correction via 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 via HARQ, priority handling, and logical channel priority ordering.

[0070] The TX processor 368 can use the channel estimate derived from the reference signal or feedback transmitted by the channel estimator 358 from the base station 310 to select an appropriate decoding and modulation scheme and facilitate spatial processing. The spatial stream generated by the TX processor 368 can be provided to different antennas 352 via individual transmitters 354Tx. Each transmitter 354Tx can use the corresponding spatial stream to modulate an RF carrier for transmission.

[0071] UL transmission is processed at base station 310 in a manner similar to that described in conjunction with the receiver function at UE 350. Each receiver 318Rx receives signals via its corresponding antenna 320. Each receiver 318Rx recovers the information modulated onto the RF carrier and provides that information to RX processor 370.

[0072] The controller / processor 375 may be associated with at least one memory 376 storing program code and data. The at least one memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets between transport and logical channels. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operation.

[0073] At least one of the TX processor 368, RX processor 356, and controller / processor 359 can be configured to combine Figure 1 The PTRS masking report component 198 performs various aspects.

[0074] At least one of the TX processor 316, RX processor 370, and controller / processor 375 can be configured to combine Figure 1 The PTRS BW allocation component 199 performs various aspects.

[0075] As discussed above, for higher-order modulation schemes, phase noise can represent a significant component of the total noise in the DL signal received at the wireless device, and continuous PTRS (in the frequency domain) can be used (e.g., transmitted with data) to estimate phase noise across a frequency range for phase noise suppression. In some aspects, phase noise suppression can include phase noise estimation operations and phase noise correction operations. For example, continuous PTRS can be used to estimate the phase noise power (e.g., a phase noise mask) relative to the associated carrier frequency, based on the range of continuous PTRS in the frequency domain, for a frequency range. Based on the estimated phase noise mask, the wireless device can be able to deconvolve the received signal (as part of the phase noise correction operation) to recover the transmitted signal.

[0076] Figure 4The system includes a first graph 400 illustrating phase noise power (e.g., phase noise mask) as a function of frequency offset relative to the carrier frequency (e.g., relative phase noise power) with respect to the associated carrier frequency; a second graph 450 illustrating relative phase noise power as a function of subcarriers carrying PTRS for a particular SCS; and a set of illustrations of PTRS configurations associated with different RIPNPs. While the second graph 450 illustrates relative phase noise power as a function of subcarriers, in some aspects it may represent an estimate of the graph of relative phase noise power as a function of frequency offset. For example, the second graph 450 may represent an assumption of constant phase noise over the bandwidth associated with a particular SCS (e.g., the frequency range may be divided into units corresponding to the frequencies of individual subcarriers based on the SCS) and the specific SCS. In some aspects, the first graph 400 and the second graph 450 may be specific to a particular radio device (e.g., UE-specific). In some aspects, the first graph 400 for a particular wireless device may be identified based on one or more of the wireless device's manufacturer, model, or specific components, and may be known in advance based on prior testing of an equivalent wireless device. In some aspects, the function (or curve 455) illustrated in the second graph 450 may be used to determine or calculate the residual integrated phase noise (relative) power (e.g., RIPNP) as a function of the number of subcarriers (tap) used to carry PTRS (e.g., for a particular SCS). In some aspects, the determination and / or calculation of RIPNP may be performed based on the prior-known first graph 400, such that the wireless device may be configured (e.g., by the manufacturer) with RIPNP functions and / or RIPNP-related information (e.g., data indicating the number of taps and / or subcarriers associated with different RIPNP amounts).

[0077] The second graph 450 illustrates curve 455 representing the power associated with each subcarrier and / or tap carrying the PTRS, measured from a starting frequency (e.g., a frequency selected as a reference frequency). In some aspects, the starting frequency may be one of the starting (e.g., lowest) frequency of a continuous subcarrier block including the PTRS, the ending (e.g., highest) frequency of a continuous subcarrier block including the PTRS, or a frequency located at the center within a continuous subcarrier block including the PTRS. The second graph 450 further illustrates that the correctable phase noise for a selected number (N4) of taps and / or subcarriers carrying the PTRS is the area 460 below curve 455 from 0 taps and / or subcarriers to the selected number (N4) of taps and / or subcarriers. The second figure 450 further illustrates that for a selected number (N4) of taps and / or subcarriers carrying PTRS, the residual phase noise power (e.g., RIPNP) associated with omitting PTRS from the remaining taps and / or subcarriers is the area 470 below curve 455 from the selected number (N4) of taps and / or subcarriers to the upper limit.

[0078] As illustrated in the first graph 400 and the second graph 450, while the ability to estimate and / or correct (or suppress) phase noise increases with each additional tap and / or subcarrier carrying or including PTRS, the amount of additional phase noise correction per tap and / or subcarrier decreases with each subcarrier. For example, the function (or curve 405) illustrated in the first graph 400 (and the associated function (or curve 455) illustrated in the second graph 450) indicates that a wide range of frequencies may contribute to phase noise, but this contribution tends to decrease at larger frequency offsets. In some respects, each additional bit encoded in a symbol will reduce the threshold SNR used for accurate demodulation (e.g., demodulation with an error rate below a threshold such as bit error rate (BER), symbol error rate (SER), or block error rate (BLER)) by approximately 3 dB (e.g., about half the SNR). For example, the threshold SNR associated with 256-QAM (e.g., 8 bits per symbol) can be about –35 dB, while the threshold SNR associated with 512-QAM (e.g., 9 bits per symbol) can be about –38 dB.

[0079] Figure 480 illustrates a first configuration of PTRS on a set of discontinuous subcarriers, which can be used to estimate and / or correct constant phase noise. In some aspects, the first configuration of PTRS may include PTRS on a subset of discontinuous subcarriers of one or more resource blocks. Figures 491, 493, 495, 497, and 499 illustrate continuous PTRS for estimation and / or correction of non-constant phase noise according to some aspects of this disclosure. For example, Figures 491 to 499 illustrate the use of different numbers of continuous PTRS, which may be associated with at least... Figure 5 The different RIPNPs discussed are related.

[0080] Figure 5 This includes a graph 500 (including curve 505) similar to the first graph 450, and a table 550 illustrating the number of taps and / or subcarriers corresponding to each of a plurality of threshold SNR values ​​for a particular wireless device. Table 550, or the data represented by Table 550, may be stored in the particular wireless device to be shared, as described below regarding... Figure 6 As described. Although as shown in Table 550, the information can be any data format that stores a mapping between one or more (e.g., multiple) RIPNPs and corresponding numbers of taps and / or subcarriers. Table 550 includes different thresholds (θ) for identifying the residual integrated phase noise power associated with the maximum phase noise power. i The corresponding number of taps and / or subcarriers (N) iA set of entries (e.g., including entries 560, 570, 580, and 590) whose maximum phase noise power allows demodulation of the corresponding modulation order. For example, a first threshold 563 (e.g., θ0) that may be associated with a first modulation (e.g., 256-QAM) (or modulation and decoding scheme (MCS)) is identified as corresponding to a first number 561 (N0) of taps and / or subcarriers (e.g., 13 taps and / or subcarriers associated with approximately –35.5 dB of RIPNP). Similarly, a second threshold 573 (e.g., θ1), a fifth threshold 583 (e.g., θ4), and a sixth threshold 593 (e.g., θ5) may be identified as corresponding to a second number 571 (N1) of taps and / or subcarriers, a fifth number 581 (N4) of taps and / or subcarriers, and a sixth number 591 (N5) of taps and / or subcarriers, respectively. For example, Table 550 may identify 23, 36, 57, 102, 205, 327, and 464 taps and / or subcarriers that may be associated with RIPNPs of approximately –39.2 dB, approximately –42.8 dB, approximately –45.2 dB, approximately –48.2 dB, approximately –51.6 dB, approximately –53.9 dB, and approximately –55.8 dB, respectively. As described above, the indicated thresholds are separated from adjacent thresholds by approximately 3 dB (e.g., the difference between the first threshold 563 and the second threshold 573, or the difference between the fifth threshold 583 and the sixth threshold 593), but the difference in the number of taps and / or subcarriers between adjacent entries increases as the threshold RIPNP decreases (e.g., the difference between N0 and N1 is 10, while for a similar approximately 3 dB difference, the difference between N4 and N5 is 103). While the specific number of taps and / or subcarriers and the thresholds may differ for different wireless devices (e.g., associated with different phase noise masks), the general trends illustrated by Figures 500 and Tables 550 (e.g., the number of additional subcarriers used to achieve similar gains in phase noise suppression for adjacent thresholds) can represent the relationship between the number of taps and / or subcarriers used to transmit PTRS and the corresponding RIPNPs of other devices.

[0081] As described above, some PTRS configurations may use a fixed number of consecutive taps and / or subcarriers carrying PTRS based on a desired phase noise mask and, in some respects, based on a desired modulation order for all communications (e.g., UE-specific phase noise mask information and, in some respects, modulation order associated with a particular communication or transmission). In some aspects, the desired phase noise mask and / or the fixed number of consecutive taps and / or subcarriers carrying PTRS may be configured to achieve a specific error rate (e.g., 10) for a specific percentage (e.g., 90% to 99%) of radio devices. -5(SER of the PTRS). In some respects, the fixed number of consecutive taps and / or subcarriers carrying the PTRS may be further determined based on the expected highest-order modulation, or based on the modulation order selected or known by the transmitting device. Since the number of taps and / or subcarriers carrying the PTRS for phase noise estimation and correction may vary significantly between devices and for different demodulation orders (or MCS), using a number of taps and / or subcarriers corresponding to (1) a phase noise mask with a high RIPNP for the same number of taps and / or subcarriers or (2) a demodulation order higher than the demodulation order used for a particular communication may be wasteful of resources (e.g., may increase overhead, power consumption, complexity and / or delay).

[0082] For example, using the examples in Table 550, if an incorrect MCS or threshold RIPNP value is identified for communication, such that a sixth number of 591 (N5) taps and / or subcarriers (e.g., 205 taps and / or subcarriers) is used based on applying a sixth threshold 593 (e.g., θ5), instead of using a fifth number of 581 (N4) taps and / or subcarriers (e.g., 102 taps and / or subcarriers) based on applying a fifth threshold 583 (e.g., θ4), it will result in the use of approximately 100 additional taps and / or subcarriers, exceeding the number sufficient to estimate and correct phase noise. In this case, approximately 100 additional taps and / or subcarriers would represent an increase in overhead of approximately 100%. Similarly, if a general table is used with a RIPNP threshold that maps to a phase noise mask that is expected to be as bad as or worse than the phase noise mask associated with most devices (e.g., one of 50%, 85%, 90%, or 95% of devices), then the selected RIPNP threshold may be associated with a larger number of taps and / or carriers than the number of taps and / or carriers that would be sufficient for phase noise estimation and correction at the specific device associated with Table 550.

[0083] Figure 6 This is a call flowchart 600 illustrating a method for PTRS resource allocation for wireless communication. Call flowchart 600 includes a base station 602 (e.g., as an example of a network device or network node that may include one or more components of a decomposed base station), which may be involved in communication with a UE 604 (e.g., as an example of a wireless device). In some aspects, the functionality attributable to base station 602 may be provided by network entities, network nodes, or network devices (as described above regarding...). Figure 1The functions described herein are performed by one or more components of a single network entity / node / device or a decomposed network entity / node / device. Similarly, in some aspects, the functions attributable to UE 604 may be performed by one or more components of a wireless device that supports communication with the network entity / node / device. Therefore, the reference to “transmit” in the following description may be understood to mean that the first component of base station 602 (or UE 604) outputs (or provides) an indication of the content to be transmitted by different components of base station 602 (or UE 604). Similarly, the reference to “receive” in the following description may be understood to mean that the first component of base station 602 (or UE 604) receives the transmitted signal and outputs (or provides) the received signal (or information based on the received signal) to different components of base station 602 (or UE 604).

[0084] In some aspects, base station 602 may send a phase noise cancellation capability request 605, which UE 604 may receive. This phase noise cancellation capability request includes an indication of whether UE 604 is capable of performing phase noise estimation and cancellation using continuous PTRS and reporting the RIPNP mapping associated with performing phase noise estimation and cancellation using continuous PTRS. UE 604 may send a phase noise cancellation capability indication 606, which base station 602 may receive. In some aspects, the phase noise cancellation capability indication 606 may be sent in response to the phase noise cancellation capability request 605. In some aspects, the phase noise cancellation capability request 605 may be omitted, and the phase noise cancellation capability indication 606 may be sent in association with attachment to base station 602 (e.g., acting as a serving cell). For example, the phase noise cancellation capability indication 606 may be sent via RRC and / or MAC layer signaling associated with the attachment process. In some respects, the phase noise cancellation capability indication 606 may include an indication (e.g., a unit indication or a multi-bit indication) of the UE 604’s ability to report information about the mapping of RIPNP to the number of taps and / or subcarriers.

[0085] In some aspects, base station 602 may send a RIPNP indication request 608, and UE 604 may receive the RIPNP indication request. In some aspects, RIPNP indication request 608 may be sent based on phase noise cancellation capability indication 606. In some aspects, phase noise cancellation capability indication 606 may be omitted, and base station may send RIPNP indication request 608 as part of or after the attachment process. In some aspects, RIPNP indication request 608 may instruct UE 604 to report (or indicate) at least one of (1) the ability to report RIPNP information (e.g., where phase noise cancellation capability indication 606 may be sent in response to RIPNP indication request 608) and / or (2) RIPNP information. In some respects, RIPNP indication request 608 may indicate a set of parameters for generating RIPNP information, such as an MCS indication table for an associated communication (e.g., an associated data signal) or a set of threshold RIPNP values ​​associated with that communication (e.g., a RIPNP list to provide a corresponding number of taps and / or subcarriers).

[0086] At 610, UE 604 may identify a mapping of RIPNPs to the number of taps and / or subcarriers (e.g., RIPNPs associated with a phase noise mask) associated with the receiver of UE 604. The mapping may indicate a mapping associated with a configured set of RIPNP thresholds for a known set of RIPNP thresholds associated with different modulation orders and / or MCS indices. In some aspects, UE 604 may be configured with multiple mappings of RIPNPs to corresponding multiple numbers of taps and / or subcarriers for carrying PTRS. For example, the multiple RIPNPs may include a set of RIPNP thresholds associated with different QAM orders (e.g., 256-QAM, 512-QAM, etc.), or may include a set of RIPNP values ​​separated by the same scaling factor (e.g., a set of RIPNP values ​​in 1 dB steps), which may then be selected based on an MCS index table configured during the attachment process. In some aspects, multiple RIPNPs may include RIPNPs that allow different possible MCSs or MCS indexes (e.g., for each MCS table in multiple MCS tables). In some aspects, mapping information (e.g., table 650) may further identify MCS index tables and MCS indexes associated with each mapping (e.g., MCS index 680) to identify the relevant set of mappings for a particular communication session using a specific MCS index table.

[0087] Additionally, at 610, the mapping of RIPNPs can be identified based on additional considerations or characteristics of communication with base station 602. For example, the communication type (eMBB, mMTC, or URLLC) can be indicated to or known to UE 604 and can be used to determine the acceptable BER, BLER, or SER that can be associated with a specific set of RIPNP values ​​for different MCS indices or modulation orders. Additionally or alternatively, the application type can similarly affect that specific set of RIPNP values ​​for different MCS indices or modulation orders. In some aspects, the parameter set or SCS can be used to determine the number of subcarriers corresponding to the frequency range or bandwidth associated with the selected and / or identified RIPNPs. Therefore, the mapping of RIPNPs to the number of identified taps and / or subcarriers can be based on a variety of factors.

[0088] Based on the mapping identified at 610, and in some aspects, based on RIPNP indication request 608, UE 604 may send RIPNP indication 612, and base station 602 may receive the RIPNP indication. In some aspects, RIPNP indication 612 may include (1) information (e.g., table 650) mapping each of a plurality of RIPNPs (e.g., RIPNP 670) to a corresponding number of subcarriers (e.g., the number of taps 660) or (2) an index identifying one of a plurality of mappings of each of the plurality of RIPNPs to a corresponding number of subcarriers, wherein the index is included in a set of mappings maintained at the network. In some aspects, using the index identifying one of the plurality of mappings, base station 602 may indicate the plurality of mappings in RIPNP indication request 608 (or other related transmission as part of attachment or RRC configuration), or the plurality of mappings may be a known (e.g., configured) plurality of mappings. As discussed with respect to identifying RIPNP mappings at 610, RIPNP indication 612 may be communication-specific.

[0089] Based on RIPNP indication 612, at 614, base station 602 can determine a PTRS allocation (e.g., PTRS BW) within a frequency set (e.g., BW or BWP) associated with the communication. In some aspects, the PTRS allocation determined at 614 can be further based on the MCS index associated with the communication, the application type associated with the communication, or other relevant characteristics of the communication.

[0090] Based on the PTRS allocation determined at 614, base station 602 may transmit PTRS configuration indication 616, and UE 604 may receive the PTRS configuration indication. In some aspects, PTRS configuration indication 616 may be transmitted via a PDCCH (e.g., via DCI) associated with a specific communication (e.g., including data signals and the indicated PTRS). In some aspects, PTRS configuration indication 616 may include indications of the number of subcarriers carrying or associated with the PTRS and the location of consecutive PTRSs. In some aspects, the indication of the location of the PTRS may include a start position (e.g., using an absolute or relative indication to indicate a specific RE in the frequency domain) and a length (e.g., in terms of the number of subcarriers or resource elements in the frequency domain).

[0091] Base station 602 may subsequently transmit communication 618 including a configured PTRS and associated data signals, and UE 604 may receive this communication. In some aspects, the configured PTRS may be included in at least each symbol associated with the data signal to be demodulated. At 620, UE 604 may perform phase noise estimation and correction operations for the data signals included in communication 618 based on the configured PTRS. In some aspects, the phase noise estimation may be dynamic phase noise estimation (e.g., per OFDM symbol). Based on the phase noise estimation and correction operations, at 620, UE 604 may demodulate the data signals included in communication 618 and associated with the configured PTRS. For example, phase noise estimation and correction may include adjusting the phase and / or amplitude identified for one or more symbols of the data signal based on the phase noise estimation.

[0092] In some respects, phase noise estimation can be based on a set of equations (or a similar set of equations) given below. For example, the received signal can be expressed as... ,in Indicates the effect of the channel. The signal sent It is phase noise in the frequency domain. It is additive white Gaussian noise (AWGN), and It is a circular convolution operator. In some aspects, channel estimation (e.g., where the estimated channel is...) This can be performed as part of the phase noise estimation. Additionally, a vector of the phase noise BW assumed according to the subcarrier representation at the transmitter phase noise can be used. In order to calculate the signal The following equation can be used.

[0093] ,in The known symbol interval (PTRS) is such that the least squares estimator can be given by the following equation: Based on the calculated In some aspects, deconvolution (e.g., correction) operations can be performed to recover the transmitted signal. In other aspects, channel estimation may be slightly affected by phase noise, allowing the use of iterative methods, such as performing successive iterations of channel estimation followed by phase noise estimation that may terminate based on convergence or other criteria. While a method consistent with OFDM configurations has been proposed, other estimation methods can be used based on relevant configurations and / or constraints.

[0094] Figure 7 This is a flowchart 700 of a wireless communication method. This method can be performed by a wireless device such as a UE (e.g., UE 104, 604; device 1104). In some aspects, the UE can receive from a network device a request for an indication (e.g., a capability indication) of the ability of the wireless device to perform phase noise estimation and correction operations using PTRS on a number of consecutive subcarriers. In some aspects, for example, if the UE is configured to send a capability indication without a request, the request for providing the capability indication can be omitted. For example, refer to... Figure 6 UE 604 can receive a phase noise cancellation capability request 605 from base station 602.

[0095] In some respects, the UE may send an indication to the network equipment of its capability to perform phase noise estimation and correction operations using PTRS transmitted on a certain number of consecutive subcarriers. In other respects, the capability indication may be sent in response to a request for providing a capability indication, or it may be sent without a request, as discussed above. Reference Figure 6 For example, in response to or independently of the phase noise cancellation capability request 605, the UE 604 may send a phase noise cancellation capability indication 606, and the base station 602 may receive the phase noise cancellation capability indication.

[0096] In some aspects, the UE may receive from the network device a request for providing an indication of the mapping of RIPNP to the number of subcarriers (e.g., a RIPNP indication). In some aspects, the request may indicate an MCS index table for providing an indication of the mapping of RIPNP to the number of subcarriers. In some aspects, the request may also indicate a set of parameters (or SCS) associated with communication, which can be used to determine the mapping of RIPNP to the number of subcarriers. For example, referring to... Figure 6 UE 604 can receive RIPNP indication request 608 from base station 602.

[0097] At 708, the UE may send a first indication to the network device of mapping each of the multiple RIPNPs to a corresponding number of subcarriers. For example, 708 may be provided by... Figure 11 The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to execute this. In some aspects, the first indication may be associated with MAC layer signaling. In some aspects, the MAC layer signaling may be associated with attachment to a serving cell or base station. In some aspects, the first indication may include one of the following: information mapping each of a plurality of RIPNPs to a corresponding number of subcarriers, or an index identifying one of a plurality of mappings of each of a plurality of RIPNPs to a corresponding number of subcarriers maintained at a network device. The first indication may include information mapping each of a plurality of RIPNPs to a corresponding number of subcarriers, and each mapping may be associated with at least one modulation and decoding scheme (MCS) index. For example, refer to... Figure 6 UE604 may send RIPNP indication 612 (e.g., may include an indication of a table such as table 650 or other indication of mapping as described above), and base station 602 may receive the RIPNP indication.

[0098] At 710, the UE can receive a second indication of the number of subcarriers including PTRS based on the first indication. For example, 710 can be... Figure 11 The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to execute this. In some aspects, the second indication may be associated with PDCCH communication related to the data signal to be transmitted. In some aspects, the number of subcarriers may be indicated based on the number of RBs or REGs (e.g., a set of 12 subcarriers) or other units (e.g., CCEs) associated with resources in the frequency domain. In some aspects, the second indication may further indicate the frequency (or set of frequency domain resources) associated with the number of consecutive subcarriers, such as one of a center frequency, a start frequency, or an end frequency. For example, refer to Figure 6 UE 604 can receive PTRS configuration instruction 616 from base station 602.

[0099] At 712, the UE can receive transmissions of PTRS, including data signals and the number of subcarriers indicated in the second indication, via one or more symbols. For example, 712 can be... Figure 11The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to perform this. In some aspects, PTRS includes a continuous signal over a set of consecutive symbols associated with the data signal (e.g., in the time domain). In some aspects, this set of consecutive symbols may include each symbol of the data signal. In some aspects, the number of subcarriers is the number of consecutive subcarriers in the frequency domain. For example, refer to... Figure 6 UE 604 can receive communication 618 from base station 602, including PTRS and data signals on a specified number of subcarriers.

[0100] In some aspects, the UE can estimate the phase noise associated with the data signal based on the PTRS received on that number of subcarriers. In some aspects, the estimation can be performed per OFDM symbol or per symbol of the modulated data signal (e.g., a signal associated with a specific orthogonality, or phase, and amplitude representing multiple bits). For example, refer to Figure 6 At 620, UE 604 can perform phase noise estimation operation on communication 618.

[0101] In some aspects, the UE may perform adjustment of the received data signal based on the estimated phase noise. In some aspects, adjustment may be performed per OFDM symbol or per symbol of the modulated data signal (e.g., a signal associated with a specific orthogonality, or phase, and amplitude representing multiple bits). In some aspects, adjustment may include removing phase noise from the observed signal based on the estimated phase noise, or eliminating the phase noise effect of the observed signal based on the estimated phase noise. In some aspects, adjustment may include a deconvolution function or operation in the frequency domain (utilizing the estimated phase noise mask). For example, refer to... Figure 6 At 620, UE 604 can perform phase noise cancellation operation on communication 618.

[0102] At 718, the UE can perform demodulation of the data signal based on PTRS (e.g., based on phase noise estimation and cancellation). For example, 718 can be... Figure 11 The application processor 1106, cellular baseband processor 1124, and / or PTRS mask reporting component 198 are used to perform this. In some aspects, the cancellation described above may be part of demodulation, or it may be omitted if the estimated phase noise is used to determine the likelihood of a particular demodulation (e.g., to represent the interpretation of a particular received signal for a particular symbol). For example, refer to... Figure 6 At 620, UE 604 can perform demodulation on communication 618. After demodulation, the UE can send feedback indicating whether the demodulation was successful, and the base station can receive this feedback.

[0103] Figure 8 This is a flowchart of a wireless communication method, 800. This method can be performed by a wireless device such as a UE (e.g., UE 104, 604; device 1104). At 802, the UE can receive from a network device a request for an indication (e.g., a capability indication) of the ability of the wireless device to perform phase noise estimation and correction operations using PTRS on a number of consecutive subcarriers. For example, 802 can be performed by… Figure 11 The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to perform this function. In some aspects, for example, if the UE is configured to send a capability indication without a request, the request for providing the capability indication can be omitted. For example, refer to... Figure 6 UE 604 can receive a phase noise cancellation capability request 605 from base station 602.

[0104] At 804, the UE can send an indication to the network device regarding its ability to perform phase noise estimation and correction operations using PTRS transmitted on a certain number of consecutive subcarriers. For example, 804 can be... Figure 11 The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to perform this function. In some aspects, the capability indication may be transmitted in response to a request received at 802, or it may be transmitted without a request, as discussed above. Reference Figure 6 For example, in response to a phase noise cancellation capability request 605 or independently, the UE 604 may send a phase noise cancellation capability indication 606, and the base station 602 may receive the phase noise cancellation capability indication.

[0105] At 806, the UE may receive a request from the network device for an indication (e.g., a RIPNP indication) of providing a mapping of the number of RIPNP to subcarriers. For example, 806 may be provided by... Figure 11 The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to perform this operation. In some aspects, the request may instruct an MCS index table to provide an indication of the mapping of RIPNP to the number of subcarriers. In some aspects, the request may also instruct a set of parameters (or SCS) associated with communication, which can be used to determine the mapping of RIPNP to the number of subcarriers. For example, refer to... Figure 6 UE 604 can receive RIPNP indication request 608 from base station 602.

[0106] At 808, the UE may send a first indication to the network device of mapping each of the multiple RIPNPs to a corresponding number of subcarriers. For example, 808 may be... Figure 11 The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to execute this. In some aspects, the first indication may be associated with MAC layer signaling. In some aspects, the MAC layer signaling may be associated with attachment to a serving cell or base station. In some aspects, the first indication may include one of the following: information mapping each of a plurality of RIPNPs to a corresponding number of subcarriers, or an index identifying one of a plurality of mappings of each of a plurality of RIPNPs to a corresponding number of subcarriers maintained at a network device. The first indication may include information mapping each of a plurality of RIPNPs to a corresponding number of subcarriers, and each mapping may be associated with at least one modulation and decoding scheme (MCS) index. For example, refer to... Figure 6 UE604 may send RIPNP indication 612 (e.g., may include an indication of a table such as table 650 or other indication of mapping as described above), and base station 602 may receive the RIPNP indication.

[0107] At 810, the UE can receive a second indication of the number of subcarriers including PTRS based on the first indication. For example, 810 can be... Figure 11 The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to execute this. In some aspects, the second indication may be associated with PDCCH communication related to the data signal to be transmitted. In some aspects, the number of subcarriers may be indicated based on the number of RBs or REGs (e.g., a set of 12 subcarriers) or other units (e.g., CCEs) associated with resources in the frequency domain. In some aspects, the second indication may further indicate the frequency (or set of frequency domain resources) associated with the number of consecutive subcarriers, such as one of a center frequency, a start frequency, or an end frequency. For example, refer to Figure 6 UE 604 can receive PTRS configuration instruction 616 from base station 602.

[0108] At 812, the UE can receive, via one or more symbols, the transmission of PTRS, including data signals and the number of subcarriers indicated in the second indication. For example, 812 can be... Figure 11The application processor 1106, cellular baseband processor 1124, transceiver 1122, antenna 1180, and / or PTRS mask reporting component 198 are used to perform this. In some aspects, PTRS includes a continuous signal over a set of consecutive symbols associated with the data signal (e.g., in the time domain). In some aspects, this set of consecutive symbols may include each symbol of the data signal. In some aspects, the number of subcarriers is the number of consecutive subcarriers in the frequency domain. For example, refer to... Figure 6 UE 604 can receive communication 618 from base station 602, including PTRS and data signals on a specified number of subcarriers.

[0109] At 814, the UE can estimate the phase noise associated with the data signal based on the PTRS received on that number of subcarriers. For example, 814 can be... Figure 11 The application processor 1106, cellular baseband processor 1124, and / or PTRS mask reporting component 198 are used to perform this. In some aspects, the estimation can be performed per OFDM symbol or per symbol of the modulated data signal (e.g., a signal associated with a specific quadrature, or phase, and amplitude representing multiple bits). For example, refer to Figure 6 At 620, UE 604 can perform phase noise estimation operation on communication 618.

[0110] At 816, the UE can perform adjustment of the received data signal based on the estimated phase noise. For example, 816 can be... Figure 11 The application processor 1106, cellular baseband processor 1124, and / or PTRS mask reporting component 198 are used to perform the adjustment. In some aspects, the adjustment can be performed per OFDM symbol or per symbol of the modulated data signal (e.g., a signal associated with a specific orthogonality, or phase, and amplitude representing multiple bits). In some aspects, the adjustment can include removing phase noise from the observed signal based on estimated phase noise, or eliminating the phase noise effect of the observed signal based on estimated phase noise. In some aspects, the adjustment can include a deconvolution function or operation in the frequency domain (utilizing the estimated phase noise mask). For example, refer to... Figure 6 At 620, UE 604 can perform phase noise cancellation operation on communication 618.

[0111] At 818, the UE can perform demodulation of the data signal based on PTRS (e.g., based on phase noise estimation and cancellation). For example, 818 can be performed by... Figure 11The application processor 1106, cellular baseband processor 1124, and / or PTRS mask reporting component 198 are used to perform this. In some aspects, the cancellation described above may be part of demodulation, or it may be omitted if the estimated phase noise is used to determine the likelihood of a particular demodulation (e.g., to represent the interpretation of a particular received signal for a particular symbol). For example, refer to... Figure 6 At 620, UE 604 can perform demodulation on communication 618. After demodulation, the UE can send feedback indicating whether the demodulation was successful, and the base station can receive this feedback.

[0112] Figure 9 This is a flowchart 900 of a wireless communication method. This method can be performed by network devices such as base stations (e.g., base stations 102, 602; network entities 1102, 1202). In some aspects, the base station can output a request to a wireless device (e.g., a UE) for an indication (e.g., a capability indication) of the ability of the wireless device to perform phase noise estimation and correction operations using PTRS on a number of consecutive subcarriers. In some aspects, for example, if the UE is configured to send a capability indication without a request, the request to provide the capability indication can be omitted. For example, refer to... Figure 6 Base station 602 may output phase noise cancellation capability request 605 to UE 604.

[0113] In some respects, a base station may receive from a radio device an indication of its capability to perform phase noise estimation and correction operations using PTRS transmitted on a number of consecutive subcarriers. In some respects, the capability indication may be received in response to a request, or may be received without a request, as discussed above. Reference Figure 6 For example, in response to or independently of the phase noise cancellation capability request 605, the base station 602 may receive the phase noise cancellation capability indication 606, and the UE 604 may output the phase noise cancellation capability indication.

[0114] In some aspects, a base station may output a request to a wireless device for providing an indication of the mapping of the number of RIPNPs to subcarriers (e.g., a RIPNP indication). In some aspects, the request may indicate an MCS index table for providing an indication of the mapping of the number of RIPNPs to subcarriers. In some aspects, the request may also indicate a set of parameters (or SCS) associated with communication, which can be used to determine the mapping of the number of RIPNPs to subcarriers. For example, refer to... Figure 6 Base station 602 can output RIPNP indication request 608 to UE 604.

[0115] At point 910, the base station can receive from the radio device a first indication of the corresponding number of subcarriers mapped to each of the plurality of RIPNPs. For example, point 910 can be... Figure 12 The first indication is executed by the CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW allocation component 199. In some aspects, the first indication may be associated with MAC layer signaling. In some aspects, the MAC layer signaling may be associated with attachment to the serving cell or base station. In some aspects, the first indication may include one of the following: information mapping each of a plurality of RIPNPs to a corresponding number of subcarriers, or an index identifying one of a plurality of mappings of each of a plurality of RIPNPs to a corresponding number of subcarriers maintained at the network device. The first indication may include information mapping each of a plurality of RIPNPs to a corresponding number of subcarriers, and each mapping may be associated with at least one modulation and decoding scheme (MCS) index. For example, refer to... Figure 6 Base station 602 may receive RIPNP indication 612 (e.g., may include an indication of a table such as table 650 or other indication of mapping as described above), and UE 604 may send the RIPNP indication.

[0116] In some aspects, the base station may determine the number of subcarriers indicated in the second indication based on a first indication and an MCS (or MCS index) associated with the data signal. In some aspects, the base station may determine a PTRS allocation (e.g., PTRS BW) within a frequency set (e.g., BW or BWP) associated with the communication. In some aspects, the determined PTRS allocation may be further based on the application type associated with the communication or other relevant characteristics of the communication. In some aspects, this determination may be based on threshold phase noise associated with the MCS or MCS index. For example, referencing... Figure 6 Base station 602 can determine the PTRS allocation within the frequency set associated with communication at 614.

[0117] At point 912, the base station can output a second indication of the number of subcarriers, including PTRS, based on the first indication. For example, 912 can be determined by... Figure 12The second indication is executed by the CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW allocation component 199. In some aspects, the second indication may be further based on the first indication and the MCS (or MCS index) associated with the data signal to determine the PTRS allocation. In some aspects, the second indication may be associated with PDCCH communication related to the data signal to be transmitted. In some aspects, the number of subcarriers may be indicated based on the number of RBs or REGs (e.g., a set of 12 subcarriers) or other units (e.g., CCEs) associated with resources in the frequency domain. In some aspects, the second indication may further indicate the frequency (or set of frequency domain resources) associated with the number of consecutive subcarriers, such as one of the center frequency, start frequency, or end frequency. For example, refer to... Figure 6 The base station 602 can output a PTRS configuration instruction 616 to the UE 604.

[0118] At 914, the base station can output transmissions including data signals and PTRS on subcarriers of the number indicated in the second indication via one or more symbols. For example, 914 can be... Figure 12 The CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW allocation component 199 are used to perform this operation. In some aspects, PTRS comprises a continuous signal over a set of consecutive symbols associated with the data signal (e.g., in the time domain). In some aspects, this set of consecutive symbols may include each symbol of the data signal. In some aspects, the number of subcarriers is the number of consecutive subcarriers in the frequency domain. For example, refer to... Figure 6 The base station 602 can output communication 618 from the UE 604, including PTRS and data signals on the indicated number of subcarriers.

[0119] In some aspects, the UE can estimate the phase noise associated with the data signal based on the PTRS received on that number of subcarriers. In some aspects, the estimation can be performed per OFDM symbol or per symbol of the modulated data signal (e.g., a signal associated with a specific orthogonality, or phase, and amplitude representing multiple bits). For example, refer to Figure 6At 620, UE 604 may perform a phase noise estimation operation on communication 618. In some aspects, the UE may perform adjustments to the received data signal based on the estimated phase noise. In some aspects, adjustments may be performed per OFDM symbol or per symbol of the modulated data signal (e.g., a signal associated with a specific orthogonality, or phase, and amplitude representing multiple bits). In some aspects, the adjustment may include removing phase noise from the observed signal based on the estimated phase noise, or eliminating the phase noise effect of the observed signal based on the estimated phase noise. In some aspects, the adjustment may include a deconvolution function or operation in the frequency domain (using the estimated phase noise mask). For example, refer to... Figure 6 At 620, UE 604 can perform phase noise cancellation operation on communication 618.

[0120] In some aspects, the UE may perform demodulation of the data signal based on PTRS (e.g., based on phase noise estimation and cancellation). In some aspects, the cancellation described above may be part of demodulation, or it may be omitted if the estimated phase noise is used to determine the likelihood of a particular demodulation (e.g., representing the interpretation of a particular received signal for a particular symbol). For example, refer to Figure 6 At 620, UE 604 can perform demodulation on communication 618. After demodulation, the UE can send feedback indicating whether the demodulation was successful, and the base station can receive this feedback.

[0121] Figure 10 This is a flowchart 1000 of a wireless communication method. This method can be performed by a network device such as a base station (e.g., base station 102, 602; network entity 1102, 1202). At 1002, the base station can output a request to a wireless device (e.g., a UE) for an indication (e.g., a capability indication) of the ability of the wireless device to perform phase noise estimation and correction operations using PTRS on a number of consecutive subcarriers. For example, 1002 can be performed by... Figure 12 The CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW allocation component 199 perform this function. In some aspects, for example, if the UE is configured to transmit a capability indication without a request, the request for providing a capability indication can be omitted. For example, refer to... Figure 6 Base station 602 may output phase noise cancellation capability request 605 to UE 604.

[0122] At point 1004, the base station can receive from the radio device an indication of its ability to perform phase noise estimation and correction operations using PTRS transmitted on a certain number of consecutive subcarriers. For example, 1004 can be... Figure 12 The CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW distribution assembly 199 perform this function. In some aspects, the capability indication may be received in response to a request output at 1002, or it may be received without a request, as discussed above. Reference Figure 6 For example, in response to or independently of the phase noise cancellation capability request 605, the base station 602 may receive the phase noise cancellation capability indication 606, and the UE 604 may output the phase noise cancellation capability indication.

[0123] At point 1006, the base station may output a request to the radio device for an indication (e.g., a RIPNP indication) of providing a mapping of the number of RIPNP to subcarriers. For example, 1006 may be provided by... Figure 12 The CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW allocation component 199 are used to perform this action. In some aspects, the request may instruct an MCS index table to provide an indication of the mapping of RIPNP to the number of subcarriers. In some aspects, the request may also instruct a set of parameters (or SCS) associated with communication, which can be used to determine the mapping of RIPNP to the number of subcarriers. For example, refer to... Figure 6 Base station 602 can output RIPNP indication request 608 to UE 604.

[0124] At point 1008, the base station may receive from the radio device a first indication of the corresponding number of subcarriers mapped to each of the plurality of RIPNPs. For example, 1008 may be provided by... Figure 12 The first indication is executed by the CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW allocation component 199. In some aspects, the first indication may be associated with MAC layer signaling. In some aspects, the MAC layer signaling may be associated with attachment to the serving cell or base station. In some aspects, the first indication may include one of the following: information mapping each of a plurality of RIPNPs to a corresponding number of subcarriers, or an index identifying one of a plurality of mappings of each of a plurality of RIPNPs to a corresponding number of subcarriers maintained at the network device. The first indication may include information mapping each of a plurality of RIPNPs to a corresponding number of subcarriers, and each mapping may be associated with at least one modulation and decoding scheme (MCS) index. For example, refer to... Figure 6Base station 602 may receive RIPNP indication 612 (e.g., may include an indication of a table such as table 650 or other indication of mapping as described above), and UE 604 may send the RIPNP indication.

[0125] At point 1010, the base station can determine the number of subcarriers indicated in the second indication based on the first indication and the MCS (or MCS index) associated with the data signal. For example, 1010 can be determined by... Figure 12 The CU processor 1212, DU processor 1232, RU processor 1242, and / or PTRS BW allocation component 199 perform this operation. In some aspects, the base station may determine a PTRS allocation (e.g., PTRS BW) within a frequency set (e.g., BW or BWP) associated with the communication. In some aspects, the PTRS allocation determined at 1010 may be further based on the application type associated with the communication or other relevant characteristics of the communication. In some aspects, this determination may be based on threshold phase noise associated with the MCS or MCS index. For example, referring to... Figure 6 Base station 602 can determine the PTRS allocation within the frequency set associated with communication at 614.

[0126] At point 1012, the base station can output a second indication of the number of subcarriers including PTRS based on the first indication and the determination at point 1010. For example, point 1012 can be determined by... Figure 12 The second indication is executed by the CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW allocation component 199. In some aspects, the second indication may be associated with PDCCH communication related to the data signal to be transmitted. In some aspects, the number of subcarriers may be indicated based on the number of RBs or REGs (e.g., a set of 12 subcarriers) or other units (e.g., CCEs) associated with resources in the frequency domain. In some aspects, the second indication may further indicate the frequency (or set of frequency domain resources) associated with the number of consecutive subcarriers, such as a center frequency, start frequency, or end frequency. For example, refer to... Figure 6 The base station 602 can output a PTRS configuration instruction 616 to the UE 604.

[0127] At point 1014, the base station can output transmissions including data signals and PTRS on subcarriers of the number indicated in the second indication via one or more symbols. For example, 1014 can be... Figure 12The CU processor 1212, DU processor 1232, RU processor 1242, transceiver 1246, antenna 1280, and / or PTRS BW allocation component 199 are used to perform this operation. In some aspects, PTRS comprises a continuous signal over a set of consecutive symbols associated with the data signal (e.g., in the time domain). In some aspects, this set of consecutive symbols may include each symbol of the data signal. In some aspects, the number of subcarriers is the number of consecutive subcarriers in the frequency domain. For example, refer to... Figure 6 The base station 602 can output communication 618 from the UE 604, including PTRS and data signals on the indicated number of subcarriers.

[0128] In some aspects, the UE can estimate the phase noise associated with the data signal based on the PTRS received on that number of subcarriers. In some aspects, the estimation can be performed per OFDM symbol or per symbol of the modulated data signal (e.g., a signal associated with a specific orthogonality, or phase, and amplitude representing multiple bits). For example, refer to Figure 6 At 620, UE 604 may perform a phase noise estimation operation on communication 618. In some aspects, the UE may perform adjustments to the received data signal based on the estimated phase noise. In some aspects, adjustments may be performed per OFDM symbol or per symbol of the modulated data signal (e.g., a signal associated with a specific orthogonality, or phase, and amplitude representing multiple bits). In some aspects, the adjustment may include removing phase noise from the observed signal based on the estimated phase noise, or eliminating the phase noise effect of the observed signal based on the estimated phase noise. In some aspects, the adjustment may include a deconvolution function or operation in the frequency domain (using the estimated phase noise mask). For example, refer to... Figure 6 At 620, UE 604 can perform phase noise cancellation operation on communication 618.

[0129] In some aspects, the UE may perform demodulation of the data signal based on PTRS (e.g., based on phase noise estimation and cancellation). In some aspects, the cancellation described above may be part of demodulation, or it may be omitted if the estimated phase noise is used to determine the likelihood of a particular demodulation (e.g., representing the interpretation of a particular received signal for a particular symbol). For example, refer to Figure 6 At 620, UE 604 can perform demodulation on communication 618. After demodulation, the UE can send feedback indicating whether the demodulation was successful, and the base station can receive this feedback.

[0130] Figure 11Figure 1100 illustrates an example of a hardware implementation for device 1104. Device 1104 may be a UE, a component of a UE, or implement UE functionality. In some aspects, device 1104 may include at least one cellular baseband processor 1124 (also referred to as a modem) coupled to one or more transceivers 1122 (e.g., cellular RF transceivers). Cellular baseband processor 1124 may include at least one on-chip memory 1124'. In some aspects, device 1104 may also include one or more Subscriber Identity Module (SIM) cards 1120 and at least one application processor 1106 coupled to a Secure Digital Card (SD) card 1108 and a screen 1110. Application processor 1106 may include on-chip memory 1106'. In some aspects, device 1104 may also include a Bluetooth module 1112, a WLAN module 1114, an SPS module 1116 (e.g., a GNSS module), one or more sensor modules 1118 (e.g., a barometric pressure sensor / altimeter; motion sensors such as an inertial measurement unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio-assisted detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 1126, a power supply 1130, and / or a camera 1132. Bluetooth module 1112, WLAN module 1114, and SPS module 1116 may include on-chip transceivers (TRX) (or in some cases, only receivers (RX)). Bluetooth module 1112, WLAN module 1114, and SPS module 1116 may include their own dedicated antennas and / or communicate using one or more antennas 1180. Cellular baseband processor 1124 communicates with UE 104 and / or RU associated with network entity 1102 via transceiver 1122 through one or more antennas 1180. Cellular baseband processor 1124 and application processor 1106 may each include computer-readable media / memory 1124', 1106'. Additional memory module 1126 may also be considered as computer-readable media / memory. Each computer-readable media / memory 1124', 1106', 1126 may be non-transitory. Cellular baseband processor 1124 and application processor 1106 are each responsible for general processing, including the execution of software stored on the computer-readable media / memory. When executed by cellular baseband processor 1124 / application processor 1106, the software causes cellular baseband processor 1124 / application processor 1106 to perform the various functions described above. The computer-readable media / memory may also be used to store data manipulated by cellular baseband processor 1124 / application processor 1106 during software execution.Cellular baseband processor 1124 / application processor 1106 may be a component of UE 350 and may include at least one of memory 360 and / or TX processor 368, RX processor 356 and controller / processor 359. In one configuration, device 1104 may be at least one processor chip (modem and / or application) and may include only cellular baseband processor 1124 and / or application processor 1106, while in another configuration, device 1104 may be the entire UE (e.g., see below). Figure 3 The UE 350 includes an additional module of the device 1104.

[0131] As discussed above, the PTRS mask reporting component 198 can be configured to: send a first indication to a network device of the corresponding number of RIPNPs mapped to subcarriers; receive a second indication based on the first indication of the number of subcarriers including PTRS; receive, via one or more symbols, the transmission of the PTRS on the subcarriers including a data signal and the number indicated in the second indication; and perform demodulation of the data signal using a phase noise estimation based on the PTRS. The PTRS mask reporting component 198 can be within the cellular baseband processor 1124, the application processor 1106, or both. The PTRS mask reporting component 198 can be one or more hardware components specifically configured to execute the stated process / algorithm, implemented by one or more processors configured to execute the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. When multiple processors are implemented, the multiple processors can execute the stated process / algorithm individually or in combination. As shown, the apparatus 1104 can include a variety of components configured for various functions. In one configuration, device 1104 (and particularly cellular baseband processor 1124 and / or application processor 1106) may include components for transmitting a first indication to a network device of a corresponding number of subcarriers mapping each of a plurality of RIPNPs. In some aspects, device 1104 (and particularly cellular baseband processor 1124 and / or application processor 1106) may include components for receiving a second indication of the number of subcarriers including PTRS based on the first indication. In some aspects, device 1104 (and particularly cellular baseband processor 1124 and / or application processor 1106) may include components for receiving, via one or more symbols, the transmission of data signals and PTRS on subcarriers of the number indicated in the second indication. In some aspects, device 1104 (and particularly cellular baseband processor 1124 and / or application processor 1106) may include components for performing demodulation of the data signals using PTRS-based phase noise estimation. In some aspects, the apparatus 1104 (and in particular the cellular baseband processor 1124 and / or application processor 1106) may include components for estimating the phase noise associated with the data signal based on the PTRS received on that number of subcarriers. In some aspects, the apparatus 1104 (and in particular the cellular baseband processor 1124 and / or application processor 1106) may include components for performing adjustments to the received data signal based on the estimated phase noise.In some aspects, apparatus 1104 (and particularly cellular baseband processor 1124 and / or application processor 1106) may include components for transmitting a third indication to a network device regarding the capability to perform phase noise estimation and correction operations using PTRS transmitted on that number of consecutive subcarriers. In some aspects, apparatus 1104 (and particularly cellular baseband processor 1124 and / or application processor 1106) may include components for receiving from a network device a request for providing a third indication regarding the capability to perform phase noise estimation and correction operations using PTRS on that number of consecutive subcarriers. In some aspects, apparatus 1104 (and particularly cellular baseband processor 1124 and / or application processor 1106) may include components for receiving from a network device a request for providing a first indication. The component may be a PTRS mask reporting component 198 of apparatus 1104 configured to perform the functions described by the component. As described above, apparatus 1104 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Therefore, in one configuration, a component may be configured to perform actions described by the component or as per the description. Figure 7 and Figure 8 The functions described are TX processor 368, RX processor 356 and / or controller / processor 359.

[0132] Figure 12Figure 1200 illustrates an example of a hardware implementation for network entity 1202. Network entity 1202 may be a BS, a component of a BS, or implement BS functionality. Network entity 1202 may include at least one of CU 1210, DU 1230, or RU 1240. For example, depending on the layer functionality handled by the PTRS BW allocation component 199, network entity 1202 may include: CU 1210; both CU 1210 and DU 1230; each of CU 1210, DU 1230, and RU 1240; DU 1230; both DU 1230 and RU 1240; or RU 1240. CU 1210 may include at least one CU processor 1212. CU processor 1212 may include on-chip memory 1212'. In some aspects, CU 1210 may also include an additional memory module 1214 and a communication interface 1218. CU 1210 communicates with DU 1230 via a midhaul link (such as an F1 interface). DU 1230 may include at least one DU processor 1232. DU processor 1232 may include on-chip memory 1232'. In some aspects, DU 1230 may also include an additional memory module 1234 and a communication interface 1238. DU 1230 communicates with RU 1240 via a fronthaul link. RU 1240 may include at least one RU processor 1242. RU processor 1242 may include on-chip memory 1242'. In some aspects, RU 1240 may also include an additional memory module 1244, one or more transceivers 1246, one or more antennas 1280, and a communication interface 1248. RU 1240 communicates with UE 104. On-chip memories 1212', 1232', 1242' and additional memory modules 1214, 1234, 1244 can each be considered as computer-readable media / memory. Each computer-readable medium / memory can be non-transitory. Each of processors 1212, 1232, 1242 is responsible for general processing, including executing software stored on the computer-readable medium / memory. When executed by the corresponding processor, the software causes that processor to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the processor when executing the software.

[0133] As discussed above, the PTRS BW allocation component 199 can be configured to: obtain from a wireless device a first indication of the corresponding number of RIPNPs among a plurality of RIPNPs mapped to subcarriers; output a second indication of the number of subcarriers including PTRS based on the first indication; and transmit via one or more symbols the transmission of PTRS on the subcarriers including data signals and the number indicated in the second indication. The PTRS BW allocation component 199 may be located within one or more processors of one or more of CU 1210, DU 1230, and RU 1240. The PTRS BW allocation component 199 may be one or more hardware components specifically configured to implement the stated process / algorithm, implemented by one or more processors configured to execute the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. When multiple processors are implemented, the multiple processors may execute the stated process / algorithm individually or in combination. Network entity 1202 may include a variety of components configured for various functions. In one configuration, network entity 1202 may include components for obtaining from a wireless device a first indication of the corresponding number of subcarriers to which each of a plurality of RIPNPs is mapped. Network entity 1202 may include components for outputting a second indication of the number of subcarriers including PTRS based on the first indication. Network entity 1202 may include components for transmitting, via one or more symbols, data signals and PTRS on the number of subcarriers indicated in the second indication. Network entity 1202 may include components for determining the number of subcarriers indicated in the second indication based on the first indication and the MCS associated with the associated data signals. Network entity 1202 may include components for requesting the wireless device to provide a third indication of the capability to perform phase noise estimation and correction operations using PTRS transmitted on that number of consecutive subcarriers. Network entity 1202 may include components for receiving from the wireless device a third indication of the capability to perform phase noise estimation and correction operations using PTRS transmitted on that number of consecutive subcarriers. Network entity 1202 may include components for requesting the network device to provide the first indication. The component may be a PTRS BW allocation component 199 of network entity 1202 configured to perform the functions described by the component. As described above, network entity 1202 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Therefore, in one configuration, the component may be configured to perform the functions described by the component or as described above. Figure 9 and Figure 10 The functions described are TX processor 316, RX processor 370 and / or controller / processor 375.

[0134] Various aspects generally relate to a method for improving the allocation of PTRS BW by using device-specific phase noise masking information. Some aspects more specifically relate to sending an indication of a UE-specific phase noise mask to a network node, and receiving an indication of the number of subcarriers including PTRS and PTRS for phase noise estimation and cancellation. In some examples, the radio device may send a first indication of the corresponding number of subcarriers mapped to RIPNP (e.g., UE-specific mapping), and the network device may receive the first indication. Based on the first indication, the network node may send a second indication of the number of subcarriers including PTRS, and the radio device may receive the second indication. The network node may send PTRS on the number of subcarriers indicated in the second indication, and the radio device may receive the PTRS for estimating the phase noise of one or more symbols of the associated data signal.

[0135] Specific aspects of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some examples, the described techniques can be used to optimize the allocation of resources for PTRS transmission by indicative of a UE-specific phase noise mask (e.g., a mapping from RIPNP to a corresponding number of subcarriers for the radio device or UE). In some aspects, the optimized allocation can introduce minimized overhead associated with PTRS, and allow the receiving device to minimize the resources and / or energy used to perform phase noise estimation and correction operations.

[0136] It should be understood that the specific order or hierarchy of the boxes in the disclosed process / flowcharts is merely an example of the exemplary method. It should be understood that the specific order or hierarchy of the boxes in the process / flowcharts may be rearranged based on design preferences. Furthermore, some boxes may be combined or omitted. The appended method claims present the elements of various boxes in a sample order, but are not limited to the given specific order or hierarchy.

[0137] 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 aspects described herein but should be given the full scope consistent with the language of the claims. Unless specifically stated otherwise, references to elements in the singular form do not mean “one and only one” but rather “one or more.” Terms such as “if,” “when,” and “simultaneously” do not imply a direct temporal relationship or reaction. That is, these phrases, such as “when…”, do not imply an immediate action in response to the occurrence of an action or during the occurrence of an action, but simply suggest that if a condition is met, then the action will occur, without requiring a specific or immediate time limit for the occurrence of the action. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or superior to other aspects. Unless specifically stated otherwise, 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" can 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 collection of elements with a number of one or more elements. Therefore, for a set of X, X will include one or more elements. When at least one processor is configured to execute a set of functions, the at least one processor is configured to execute the set of functions individually or in any combination. Therefore, each of the at least one processor can be configured to perform a specific subset of the set of functions, wherein the subset is the complete set, a suitable subset of the set, or an empty subset of the set. A processor may be referred to as a processor circuit. A memory / memory module may be referred to as a memory circuit. If the first device receives data from or sends data to the second device, data can be received / sent directly between the first and second devices, or indirectly between the first and second devices through a set of devices. A device configured to "output" data (such as transmission, signal, or message) may, for example, transmit the data using a transceiver, or may transmit the data to the device that sent the data.A device configured to "acquire" data (such as, transmit, signal, or message) may, for example, receive the data using a transceiver, or may obtain the data from a device that receives the data. Information stored in memory includes instructions and / or data. All structural and functional equivalents of the elements throughout the various aspects described herein that are known to those skilled in the art or will later be known are expressly incorporated herein by reference and are covered by the claims. Furthermore, nothing disclosed herein is intended to be offered to the public, whether or not such disclosure is expressly recited in the claims. The words "module," "mechanism," "element," "device," etc., cannot replace the word "component." Therefore, no claim element will be construed as a functional component unless the element is expressly recited using the phrase "component for..."

[0138] As used in this article, 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, conditions, factors, etc.) should be interpreted as “based on at least A”, unless specifically stated differently.

[0139] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0140] Aspect 1 is a method for performing wireless communication at a wireless device, the method comprising: transmitting to a network device a first indication of mapping each of a plurality of residual integrated phase noise power (RIPNP) to a corresponding number of subcarriers; receiving, based on the first indication, a second indication of the number of subcarriers including a phase tracking reference signal (PTRS); receiving, via one or more symbols, a transmission of the PTRS on the number of subcarriers indicated in the second indication, including a data signal; and performing demodulation of the data signal using a phase noise estimation based on the PTRS.

[0141] Aspect 2 is the method according to aspect 1, the method further comprising: estimating phase noise associated with the data signal based on the PTRS received on the number of subcarriers; and performing adjustment of the received data signal based on the estimated phase noise, wherein the demodulation of the data signal is based on the adjusted data signal.

[0142] Aspect 3 is the method according to any one of Aspects 1 and 2, wherein the second indication is associated with physical downlink control channel (PDCCH) communication related to the data signal.

[0143] Aspect 4 is the method according to any one of Aspects 1 to 3, wherein the PTRS comprises a continuous signal on a set of continuous symbols associated with the data signal.

[0144] Aspect 5 is the method according to any one of aspects 1 to 4, wherein the number of subcarriers is the number of consecutive subcarriers in the frequency domain.

[0145] Aspect 6 is the method according to aspect 5, wherein the second indication further indicates the frequency associated with the number of consecutive subcarriers.

[0146] Aspect 7 is the method according to any one of aspects 5 and 6, the method further comprising: transmitting a third indication to the network device of its ability to perform phase noise estimation and correction operations using the PTRS transmitted on the number of consecutive subcarriers.

[0147] Aspect 8 is the method according to aspect 7, the method further comprising: receiving from the network device a request for a third indication of the capability to perform phase noise estimation and correction operations using the PTRS on the number of consecutive subcarriers, wherein the third indication is sent based on receiving the request.

[0148] Aspect 9 is the method according to any one of aspects 7 and 8, the method further comprising: receiving from the network device a request to provide the first indication, wherein the first indication is sent based on receiving the request.

[0149] Aspect 10 is the method according to any one of aspects 1 to 9, wherein the first indication is associated with media access control (MAC) layer signaling.

[0150] Aspect 11 is the method according to aspect 10, wherein the MAC layer signaling is associated with attachment to the serving cell.

[0151] Aspect 12 is a method according to any one of aspects 1 to 11, wherein the first indication includes one of the following: information mapping each of the plurality of RIPNPs to the corresponding number of subcarriers, or an index identifying one of the plurality of mappings of each of the plurality of RIPNPs to the corresponding number of subcarriers maintained at the network device.

[0152] Aspect 13 is the method according to aspect 12, wherein the first indication includes the information mapping each of the plurality of RIPNPs to the corresponding number of subcarriers, and each mapping is associated with at least one modulation and decoding scheme (MCS) index.

[0153] Aspect 14 is a method for wireless communication at a network device, the method comprising: obtaining from the wireless device a first indication of a corresponding number of residual integrated phase noise power (RIPNP) of a plurality of residual integrated phase noise power (RIPNP) to subcarriers; outputting, based on the first indication, a second indication of the number of subcarriers including a phase tracking reference signal (PTRS); and transmitting the PTRS on the number of subcarriers indicated in the second indication in order to estimate the phase noise of one or more symbols of an associated data signal at the wireless device.

[0154] Aspect 15 is the method according to aspect 14, wherein the second indication is associated with physical downlink control channel (PDCCH) communication related to the associated data signal.

[0155] Aspect 16 is the method according to any one of aspects 14 and 15, wherein the PTRS comprises a continuous signal on a set of continuous symbols associated with the associated data signal.

[0156] Aspect 17 is the method according to any one of aspects 14 to 16, wherein the number of subcarriers is the number of consecutive subcarriers in the frequency domain.

[0157] Aspect 18 is the method according to aspect 17, wherein the second indication further indicates the frequency associated with the number of consecutive subcarriers.

[0158] Aspect 19 is a method according to any one of aspects 17 and 18, the method further comprising: receiving from the wireless device a third indication of the ability to perform phase noise estimation and correction operations using the PTRS transmitted on the number of consecutive subcarriers.

[0159] Aspect 20 is the method according to aspect 19, the method further comprising: outputting a request to the wireless device for providing the capability to perform phase noise estimation and correction operations using the PTRS on the number of consecutive subcarriers, wherein the third indication is received based on receiving the request.

[0160] Aspect 21 is a method according to any one of aspects 14 to 20, the method further comprising: receiving from the network device a request to provide the first indication, wherein the first indication is sent based on receiving the request.

[0161] Aspect 22 is the method according to any one of aspects 14 to 21, wherein the first indication is associated with media access control (MAC) layer signaling.

[0162] Aspect 23 is the method according to aspect 22, wherein the MAC layer signaling is associated with attachment to the serving cell.

[0163] Aspect 24 is a method according to any one of aspects 14 to 23, wherein the first indication includes one of the following: information mapping each of the plurality of RIPNPs to the corresponding number of subcarriers, or an index identifying one of the plurality of mappings of each of the plurality of RIPNPs to the corresponding number of subcarriers maintained at the network device.

[0164] Aspect 25 is the method according to aspect 24, wherein the first indication includes the information mapping each of the plurality of RIPNPs to the corresponding number of subcarriers, and each mapping is associated with at least one modulation and decoding scheme (MCS) index.

[0165] Aspect 26 is a method according to any one of aspects 14 to 25, the method further comprising: determining the number of subcarriers indicated in the second indication based on the first indication and a modulation and decoding scheme (MCS) associated with the associated data signal.

[0166] Aspect 27 is an apparatus for wireless communication at a device, the apparatus including a memory and at least one processor coupled to the memory and based at least in part on information stored in the memory, the at least one processor being configured to implement any one of aspects 1 to 13.

[0167] Aspect 28 is the apparatus according to aspect 27, the apparatus further comprising a transceiver or antenna coupled to the at least one processor.

[0168] Aspect 29 is an apparatus for wireless communication at a device, the apparatus including components for implementing any one of aspects 1 to 13.

[0169] Aspect 30 is a computer-readable medium (e.g., a non-transitory computer-readable medium) that stores computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 1 to 13.

[0170] Aspect 31 is an apparatus for wireless communication at a device, the apparatus including a memory and at least one processor coupled to the memory and based at least in part on information stored in the memory, the at least one processor being configured to implement any one of aspects 14 to 26.

[0171] Aspect 32 is the apparatus according to aspect 31, the apparatus further comprising a transceiver or antenna coupled to the at least one processor.

[0172] Aspect 33 is an apparatus for wireless communication at a device, the apparatus including components for implementing any one of aspects 14 to 26.

[0173] Aspect 34 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 14 to 26.

Claims

1. An apparatus for performing wireless communication at a wireless device, the apparatus comprising: At least one memory; and At least one processor, coupled to the at least one memory, and based at least in part on stored information stored in the at least one memory, wherein the at least one processor is configured individually or in any combination as follows: For network devices, a first indication is sent to map each of the multiple residual integrated phase noise power (RIPNP) to a corresponding number of subcarriers; Based on the first indication, a second indication is received regarding the number of subcarriers, including the phase tracking reference signal (PTRS); Receive, via one or more symbols, data signals and the transmission of the PTRS on the number of subcarriers indicated in the second indication; and Demodulation of the data signal is performed using phase noise estimation based on the PTRS.

2. The apparatus of claim 1, wherein the at least one processor is further configured, alone or in any combination, to: The phase noise associated with the data signal is estimated based on the PTRS received on the stated number of subcarriers; and The received data signal is adjusted based on the phase noise estimation, wherein the at least one processor is configured individually or in any combination to perform the demodulation of the data signal based on the adjusted data signal.

3. The apparatus of claim 1, wherein the second indication is associated with physical downlink control channel (PDCCH) communication related to the data signal.

4. The apparatus of claim 1, wherein the PTRS comprises a continuous signal on a set of continuous symbols associated with the data signal.

5. The apparatus of claim 1, wherein the number of subcarriers is the number of consecutive subcarriers in the frequency domain.

6. The apparatus of claim 5, wherein the second indication further indicates a frequency associated with the number of consecutive subcarriers.

7. The apparatus of claim 5, wherein the at least one processor is further configured, alone or in any combination, to: A third indication is given to the network device regarding its ability to perform phase noise estimation and correction operations using the PTRS transmitted on the number of consecutive subcarriers.

8. The apparatus of claim 7, wherein the at least one processor is further configured, alone or in any combination, to: The network device receives a request for a third indication of the capability to perform the phase noise estimation and correction operation using the PTRS on the number of consecutive subcarriers, wherein the at least one processor is configured, individually or in any combination, to send the third indication based on the receipt of the request.

9. The apparatus of claim 7, wherein the at least one processor is further configured, alone or in any combination, to: The network device receives a request to provide the first indication, wherein the at least one processor is configured, individually or in any combination, to send the first indication based on the receipt of the request.

10. The apparatus of claim 1, wherein the first indication is associated with Media Access Control (MAC) layer signaling.

11. The apparatus of claim 10, wherein the MAC layer signaling is associated with attachment to the serving cell.

12. The apparatus of claim 1, wherein the first indication comprises one of: information mapping each of the plurality of RIPNPs to a corresponding number of subcarriers, or an index identifying one of a plurality of mappings of each of the plurality of RIPNPs to a corresponding number of subcarriers maintained at the network device.

13. The apparatus of claim 12, wherein the first indication includes the information mapping each of the plurality of RIPNPs to a corresponding number of subcarriers, and each mapping is associated with at least one modulation and decoding scheme (MCS) index.

14. An apparatus for wireless communication at a network device, the apparatus comprising: At least one memory; and At least one processor, coupled to the at least one memory, and based at least in part on stored information stored in the at least one memory, wherein the at least one processor is configured individually or in any combination as follows: Obtain a first indication from the wireless device of the corresponding number of residual integrated phase noise power (RIPNP) maps to subcarriers. Based on the first indication, output a second indication of the number of subcarriers including the phase tracking reference signal (PTRS); as well as Transmission of data signals and the PTRS on the number of subcarriers indicated in the second indication is carried out via one or more symbols.

15. The apparatus of claim 14, wherein the second indication is associated with physical downlink control channel (PDCCH) communication related to the data signal.

16. The apparatus of claim 14, wherein the PTRS comprises a continuous signal on a set of continuous symbols associated with the data signal.

17. The apparatus of claim 14, wherein the number of subcarriers is the number of consecutive subcarriers in the frequency domain.

18. The apparatus of claim 17, wherein the second indication further indicates a frequency associated with the number of consecutive subcarriers.

19. The apparatus of claim 17, wherein the at least one processor is further configured, alone or in any combination, to: The third indication is received from the wireless device regarding the ability to perform phase noise estimation and correction operations using the PTRS transmitted on the number of consecutive subcarriers.

20. The apparatus of claim 19, wherein the at least one processor is further configured, alone or in any combination, to: The request for the wireless device to output a third indication of the capability to perform the phase noise estimation and correction operation using the PTRS on the number of consecutive subcarriers, wherein the at least one processor is configured individually or in any combination to receive the third indication based on receiving the request.

21. The apparatus of claim 14, wherein the at least one processor is further configured, alone or in any combination, to: In response to a request from the wireless device to provide the first indication, wherein the at least one processor is configured individually or in any combination to receive the first indication based on receiving the request.

22. The apparatus of claim 14, wherein the first indication is associated with Media Access Control (MAC) layer signaling.

23. The apparatus of claim 22, wherein the MAC layer signaling is associated with attachment to the serving cell.

24. The apparatus of claim 14, wherein the first indication comprises one of: information mapping each of the plurality of RIPNPs to a corresponding number of subcarriers, or an index identifying one of a plurality of mappings of each of the plurality of RIPNPs to a corresponding number of subcarriers maintained at the network device.

25. The apparatus of claim 24, wherein the first indication includes the information mapping each of the plurality of RIPNPs to the corresponding number of subcarriers, and each mapping is associated with at least one modulation and decoding scheme (MCS) index.

26. The apparatus of claim 14, wherein the at least one processor is further configured, alone or in any combination, to: The number of subcarriers indicated in the second indication is determined based on the first indication and the modulation and decoding scheme (MCS) associated with the data signal.

27. A method for conducting wireless communication at a wireless device, the method comprising: For network devices, a first indication is sent to map each of the multiple residual integrated phase noise power (RIPNP) to a corresponding number of subcarriers; Based on the first indication, a second indication is received regarding the number of subcarriers, including the phase tracking reference signal (PTRS); Receive, via one or more symbols, data signals and the transmission of the PTRS on the number of subcarriers indicated in the second indication; and Demodulation of the data signal is performed using phase noise estimation based on the PTRS.

28. The method of claim 27, further comprising: The phase noise associated with the data signal is estimated based on the PTRS received on the number of subcarriers; as well as The received data signal is adjusted based on the phase noise estimation, wherein the demodulation of the data signal is based on the adjusted data signal.

29. A method for wireless communication at a network device, the method comprising: Obtain a first indication from the wireless device of the corresponding number of residual integrated phase noise power (RIPNP) maps to subcarriers. Based on the first indication, output a second indication of the number of subcarriers including the phase tracking reference signal (PTRS); as well as Transmission of data signals and the PTRS on the number of subcarriers indicated in the second indication is carried out via one or more symbols.

30. The method according to claim 29, further comprising: The number of subcarriers indicated in the second indication is determined based on the first indication and the modulation and decoding scheme (MCS) associated with the data signal.

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