Phase tracking reference signal power boost for up to 8 layer uplink transmissions

Abstract

Techniques related to multi-layer wireless communication are disclosed. Some aspects of the present disclosure relate to an apparatus and method for determining a transmit power boost for a phase tracking reference signal (PT-RS). A wireless user equipment (UE) may map multi-layer uplink transmissions to a plurality of PT-RS ports by distributing layers of the multi-layer uplink transmissions among the plurality of PT-RS ports. The UE may determine a first transmit power boost for a first PT-RS port and a second transmit power boost for a second PT-RS port, the second transmit power boost being different from the first transmit power boost. The UE may use the first transmit power boost to transmit a first PT-RS corresponding to the first PT-RS port, and use the second transmit power boost to transmit a second PT-RS corresponding to the second PT-RS port, the second PT-RS and the first PT-RS being frequency division multiplexed. Other aspects, embodiments, and features are also claimed and described.

Description

[0001] This application claims priority to U.S. Patent Application No. 18 / 351,941, filed on July 13, 2023, and U.S. Provisional Patent Application No. 63 / 371,368, filed on August 12, 2022, the entire contents of which are incorporated herein by reference. U.S. Patent Application No. 18 / 351,941, filed on July 13, 2023, claims the benefit of U.S. Provisional Patent Application No. 63 / 371,368, filed on August 12, 2022. Technical Field

[0002] The techniques discussed below relate generally to wireless communication systems, and more particularly to multi-layer uplink transmissions. Certain aspects may relate to techniques for implementing and providing a communication device configured to boost the transmit power of a phase tracking reference signal (PT-RS) in a multi-layer uplink transmission. Background Art

[0003] Oscillator phase noise generally increases with carrier frequency. Therefore, especially for higher frequencies (e.g., mmWave communications), phase noise may introduce significant common phase errors or common phase rotations of subcarriers in the wireless signal. A Phase Tracking Reference Signal (PT-RS) enables tracking the phase of the local oscillator at the UE to compensate for such phase noise. Summary of the invention

[0004] In order to provide a basic understanding of one or more aspects of the present disclosure, an overview of such aspects is provided below. This overview is not a broad review of all expected features of the present disclosure, and is neither intended to identify the key or important elements of all aspects of the present disclosure, nor is it intended to describe the scope of any or all aspects of the present disclosure. Its sole purpose is to provide some concepts of one or more aspects of the present disclosure in a simplified form, as a preface to the more detailed description given later. Although some examples may be discussed as including certain aspects or features, all discussed examples may include any discussed features. And unless explicitly described, no aspect or feature is necessary to achieve the technical effects or solutions discussed herein.

[0005] In various aspects, a power boost for a phase tracking reference signal (PT-RS) is determined and applied to multi-layer uplink transmissions. In some examples, for multi-port PTRS transmissions, different power boosts may be applied to different PT-RS ports. That is, a wireless user equipment (UE) may individually determine a PT-RS transmit power boost for each of a plurality of PT-RS ports. By implementing separate power boosts for separate PT-RS ports, a receiving node (such as a base station) may be enabled to better measure the PT-RS to compensate for phase noise at the UE. By compensating for phase noise, wireless communications with higher data rates may be achieved. In addition, improved cell capacity and / or cell spectrum efficiency may be achieved.

[0006] In one example, a method, apparatus, and non-transitory computer-readable medium for wireless communication are disclosed. A UE may map multiple layers of uplink transmissions to multiple phase tracking reference signal (PT-RS) ports, wherein the mapping includes distributing layers of the multiple layers of uplink transmissions between the multiple PT-RS ports. The UE may also determine a first transmit power boost for a first PT-RS port among the multiple PT-RS ports. The UE may also determine a second transmit power boost for a second PT-RS port among the multiple PT-RS ports, the second transmit power boost being different from the first transmit power boost. The UE may then utilize the first transmit power boost to transmit a first PT-RS corresponding to the first PT-RS port, and utilize the second transmit power boost to transmit a second PT-RS corresponding to the second PT-RS port, the second PT-RS being frequency division multiplexed with the first PT-RS.

[0007] In another example, a method, apparatus, and non-transitory computer-readable medium for wireless communication are disclosed. A UE may map a multi-layer uplink transmission to a plurality of PT-RS ports, including distributing the layers of the multi-layer uplink transmission among the plurality of PT-RS ports; determining a first transmit power boost for a first PT-RS port among the plurality of PT-RS ports based on the number of layers of the multi-layer uplink transmission transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port of the plurality of PT-RS ports and the total number of PT-RS ports associated with the multi-layer uplink transmission; and transmitting a first PT-RS corresponding to the first PT-RS port using the first transmit power boost.

[0008] After reading the following specific embodiments, these and other aspects of the technology discussed herein will become more fully appreciated. After reading the description of the following specific examples in conjunction with the accompanying drawings, other aspects and features will become apparent to those of ordinary skill in the art. Although the following description may discuss various advantages and features with respect to certain examples, specific implementations, and accompanying drawings, all examples may include one or more of the advantageous features discussed herein. In other words, although this description may discuss one or more examples as having certain advantageous features, one or more such features may also be used according to other various examples discussed herein. In a similar manner, although this description may discuss certain examples as devices, systems, or methods, it should be understood that such examples of the teachings of the present disclosure may be implemented in various devices, systems, and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic diagram of a wireless communication system according to some aspects of the present disclosure.

[0010] Figure 2 is a conceptual diagram of an example of a radio access network according to some aspects of the present disclosure.

[0011] Figure 3 is a schematic diagram of a distributed base station in an open radio access network architecture according to some aspects of the present disclosure.

[0012] Figure 4 is a conceptual diagram of a user plane protocol stack and a control plane protocol stack according to some aspects of the present disclosure.

[0013] Figure 5 is a schematic diagram of the organization of wireless resources in an air interface utilizing orthogonal frequency division multiplexing (OFDM) according to some aspects of the present disclosure.

[0014] Figure 6 is a block diagram illustrating a wireless communication system supporting multiple-input multiple-output (MIMO) communications in accordance with some aspects of the present disclosure.

[0015] Figure 7 is a conceptual diagram of an OFDM symbol including a phase tracking reference signal (PT-RS) according to some aspects of the present disclosure.

[0016] Figure 8 is a table illustrating power boosting to be applied to PT-RS transmissions based on input parameters according to some aspects of the present disclosure.

[0017] Fig. 9 is a conceptual diagram of port assignments for multi-panel user equipment according to some aspects of the present disclosure.

[0018] Fig.10is a table illustrating power boosting to be applied to PT-RS transmissions based on input parameters according to some aspects of the present disclosure.

[0019] Fig.11 is a conceptual diagram of layer mapping for multi-layer uplink transmission to multiple PT-RS ports according to some aspects of the present disclosure.

[0020] Fig.12 is a conceptual diagram of another example of layer mapping for multi-layer uplink transmission to multiple PT-RS ports according to some aspects of the present disclosure.

[0021] Fig.13 is a conceptual diagram of a technique for determining a power boost to apply to PT-RS transmissions in accordance with some aspects of the present disclosure.

[0022] Fig.14 is a block diagram conceptually illustrating an example of a hardware implementation for a base station according to some aspects of the present disclosure.

[0023] Fig.15 is a block diagram conceptually illustrating an example of a hardware implementation for a user equipment (UE) according to some aspects of the present disclosure.

[0024] Fig.16 is a call flow diagram illustrating wireless communications between user equipment and a base station according to some aspects of the present disclosure.

[0025] Fig.17 is a flow chart illustrating an example of a process for determining a transmit power boost for PT-RS transmissions in accordance with some aspects of the present disclosure. DETAILED DESCRIPTION

[0026] Oscillator phase noise generally increases with carrier frequency. Therefore, especially for higher frequencies (e.g., FR2 or mmWave communications), phase noise may introduce significant common phase errors or common phase rotations of subcarriers in orthogonal frequency division multiplexing (OFDM) signals. The Phase Tracking Reference Signal (PT-RS) enables tracking the phase of the local oscillator at the UE to compensate for such phase noise. In order to provide more robust phase noise compensation, the power of PT-RS transmission can be increased in some scenarios.

[0027] The following disclosure presents various concepts that can be implemented across various telecommunication systems, network architectures, and communication standards. Figure 1, by way of illustrative example and not limitation, the schematic diagram shows various aspects of the present disclosure with reference to a wireless communication system 100. The wireless communication system 100 includes several interacting domains: a core network 102, a radio access network (RAN) 104, and a user equipment (UE) 106. By means of the wireless communication system 100, the UE 106 may be enabled to perform data communications with an external data network 110, such as (but not limited to) the Internet.

[0028] The RAN 104 may implement any suitable one or more wireless communication technologies to provide radio access to the UE 106. As an example, the RAN 104 may operate in accordance with the 3rd Generation Partnership Project (3GPP) New Radio (NR) specification, commonly referred to as 5G or 5GNR. In some examples, the RAN 104 may operate under a mix of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, commonly referred to as Long Term Evolution (LTE). 3GPP refers to this hybrid RAN as the Next Generation RAN, or NG-RAN. Of course, many other examples may be utilized within the scope of the present disclosure.

[0029] As illustrated, the RAN 104 includes a plurality of base stations 108. In a broad sense, a base station is a network element in a radio access network that is responsible for radio transmission and reception to or from a UE in one or more cells. In different technologies, standards, or contexts, those skilled in the art may refer to a "base station" as a base transceiver station (BTS), a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), an access point (AP), a node B (NB), an evolved node B (eNB), a next generation node B (gNB), a 5G NB, a serving cell, or some other suitable terminology in different ways.

[0030] The radio access network (RAN) 104 supports wireless communications for multiple mobile devices. Those skilled in the art may refer to mobile devices as UEs as in the 3GPP specifications, but UEs may also be referred to as mobile stations (MSs), subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals (ATs), mobile terminals, wireless terminals, remote terminals, handsets, terminals, user agents, mobile clients, clients, or some other suitable terms. A UE may be a device that provides access to network services. A UE may take many forms and may include a range of devices.

[0031] Within this document, a "mobile" device (also referred to as a UE) does not necessarily need to have the ability to move, and can be stationary. The term mobile device or mobile device refers to a wide variety of devices and technologies. A UE may include a plurality of hardware structural components whose size, shape, and arrangement facilitate communication; such components may include antennas, antenna arrays, RF chains, amplifiers, one or more processors, etc. that are electrically coupled to each other. For example, some non-limiting examples of mobile devices include mobile stations, cellular (cell) phones, smart phones, session initiation protocol (SIP) phones, laptops, personal computers (PCs), notebooks, netbooks, smartbooks, tablet devices, personal digital assistants (PDAs), and a wide range of embedded systems, for example, corresponding to the "Internet of Things" (IoT). A mobile device may additionally be a car or other transportation vehicle, a remote sensor or actuator, a robot or robotic device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-rotor aircraft, a quadcopter, a remote control device, a consumer and / or wearable device (such as glasses, wearable cameras, virtual reality devices, smart watches, health or fitness trackers, digital audio players (e.g., MP3 players), cameras, game consoles, etc.). The mobile device may additionally be a digital home or smart home device, such as home audio, video and / or multimedia equipment, appliances, vending machines, smart lighting, home security systems, smart meters, etc. The mobile device may additionally be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device that controls power (e.g., smart grid), lighting, water, etc.; industrial automation and enterprise equipment; logistics controllers; and agricultural equipment; etc. Further, the mobile device may provide connected medicine or telemedicine support, such as health care at a distance. Telemedicine devices may include telemedicine monitoring devices and telemedicine management devices, whose communications may be given priority or access over other types of information, for example, in terms of priority access for the transmission of critical service data and / or related QoS for the transmission of critical service data. The mobile device may further include two or more decomposed devices that communicate with each other, including, for example, wearable devices paired with smart phones, tactile sensors, limb movement sensors, eye movement sensors, etc. In various examples, such disaggregated devices may communicate directly with each other through any suitable communication channel or interface, or may communicate with each other indirectly through a network, such as a local area network (LAN).

[0032] Wireless communication between RAN 104 and UE 106 may be described as utilizing an air interface. Transmissions from a base station (e.g., base station 108) to one or more UEs (e.g., UE 106) over the air interface may be referred to as downlink (DL) transmissions. According to certain aspects of the present disclosure, the term "downlink" may refer to point-to-multipoint transmissions originating at a scheduling entity (described further below; e.g., base station 108). Another way to describe this scheme may be to use the term "broadcast channel multiplexing". Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) may be referred to as uplink (UL) transmissions. According to further aspects of the present disclosure, the term "uplink" may refer to point-to-point transmissions originating at a scheduled entity (described further below; e.g., UE 106).

[0033] In some examples, access to the air interface may be scheduled, wherein a scheduling entity (e.g., a base station 108) allocates resources for communication between some or all devices and equipment within its service area or cell. Within the present disclosure, as discussed further below, a scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communications, a UE 106 (which may be a scheduled entity) may utilize resources allocated by the scheduling entity 108.

[0034] The base station is not the only entity that can be used as a scheduling entity. That is, in some examples, a UE or a network node can act as a scheduling entity, scheduling resources for one or more scheduled entities (eg, one or more UEs).

[0035] like Figure 1 As illustrated, a base station 108 may broadcast downlink traffic 112 to one or more UEs 106. In a broad sense, a base station 108 is a node or device responsible for scheduling traffic in a wireless communication network, including downlink traffic 112 and (in some examples) uplink traffic 116 from one or more UEs 106 to the base station 108. On the other hand, a UE 106 is a node or device that receives downlink control information 114 (including, but not limited to, scheduling information (e.g., grants), synchronization or timing information, or other control information) from another entity in the wireless communication network, such as a base station 108.

[0036] Generally, base stations 108 may include a backhaul interface for communicating with a backhaul portion 120 of a wireless communication system. Backhaul 120 may provide a link between base stations 108 and core network 102. Additionally, in some examples, a backhaul network may provide interconnections between respective base stations 108. Various types of backhaul interfaces may be employed, such as a direct physical connection using any suitable transport network, a virtual network, or the like.

[0037] The core network 102 may be part of the wireless communication system 100 and may be independent of the radio access technology used in the RAN 104. In some examples, the core network 102 may be configured according to 5G standards (e.g., 5GC). In other examples, the core network 102 may be configured according to 4G Evolved Packet Core (EPC) or any other suitable standard or configuration.

[0038] By way of example and not limitation, Figure 2 A schematic diagram of a RAN 200 is provided. In some examples, the RAN 200 may be similar to the ones described above and in Figure 1 The geographic area covered by the RAN 200 may be divided into cellular areas (cells) that a user equipment (UE) may uniquely identify based on an identity broadcast from one base station. Figure 2 Macro cells 202, 204, and 206 and a small cell 208 are illustrated.

[0039] Figure 2 Three base stations 210, 212, and 214 are shown in cells 202, 204, and 206. In the illustrated example, cells 202, 204, and 206 may be referred to as macro cells because base stations 210, 212, and 214 support cells with larger sizes. In addition, base station 218 is shown in a small cell 208 (e.g., a micro cell, a pico cell, a femto cell, a home base station, a home node B, a home evolved node B, etc.), which may overlap with one or more macro cells. In this example, cell 208 may be referred to as a small cell because base station 218 supports a cell with a relatively small size. Cell size settings may be made based on system design and component constraints.

[0040] RAN 200 may include any number of wireless base stations and cells. In addition, the RAN may include relay nodes to extend the size or coverage area of ​​a given cell. Base stations 210, 212, 214, 218 provide wireless access points to the core network for any number of mobile devices. In some examples, base stations 210, 212, 214, and / or 218 may be similar to those described above and in Figure 1 is the same as the base station / scheduling entity 108 illustrated in .

[0041] Figure 2 Also included is a quadcopter or drone 220 that can be configured to act as a base station. That is, in some examples, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move depending on the location of a mobile base station (such as a quadcopter 220).

[0042] In the RAN 200, each base station 210, 212, 214, 218, and 220 may be configured to provide access to the core network 102 (see FIG. 1 ) for all UEs in the corresponding cell. Figure 1 ) access point. For example, UEs 222 and 224 may communicate with base station 210; UEs 226 and 228 may communicate with base station 212; UEs 230 and 232 may communicate with base station 214; UE 234 may communicate with base station 218; and UE 236 may communicate with mobile base station 220. In some examples, UEs 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, and / or 242 may communicate with the above-described and Figure 1 The same as the UE / scheduled entity 106 illustrated in .

[0043] In some examples, a mobile node (e.g., quadcopter 220) can be configured to function as a UE. For example, quadcopter 220 can operate within cell 202 by communicating with base station 210.

[0044] In another aspect of RAN 200, side link signals may be used between UEs without having to rely on scheduling or control information from a base station (e.g., a scheduling entity). For example, two or more UEs (e.g., UEs 226 and 228) may communicate with each other using peer-to-peer (P2P) or side link signals 227 without relaying the communication through a base station. In another example, UE 238 is illustrated as communicating with UEs 240 and 242. Here, UE 238 may be used as a scheduling entity or a primary side link device, and UE 240 or 242 may be used as a scheduled entity or a non-primary (e.g., auxiliary) side link device. In yet another example, a UE may be used as a scheduling entity in a device-to-device (D2D), peer-to-peer (P2P), or vehicle-to-vehicle (V2V) network and / or a mesh network. In the mesh network example, in addition to communicating with the scheduling entity 238, UEs 240 and 242 may optionally communicate directly with each other. Therefore, in a wireless communication system with scheduled access to time-frequency resources and having a cellular configuration, a P2P configuration, or a mesh configuration, a scheduling entity and one or more scheduled entities may communicate using the scheduled resources.

[0045] The air interface in the RAN 200 may utilize one or more duplex algorithms. Duplex refers to a point-to-point communication link in which two endpoints can communicate with each other in two directions. Full-duplex means that two endpoints can communicate with each other simultaneously. Half-duplex means that only one endpoint can transmit information to the other endpoint using a given resource at a time. In a wireless link, a full-duplex channel generally relies on physical isolation of the transmitter and receiver and appropriate interference cancellation techniques. Full-duplex simulation is often implemented for a wireless link by utilizing frequency division duplex (FDD) or time division duplex (TDD). In FDD, transmissions in different directions operate at different carrier frequencies. In TDD, transmissions in different directions on a given channel are separated from each other using time division multiplexing. That is, at certain times, the channel is dedicated to transmissions in one direction, and at other times, the channel is dedicated to transmissions in another direction, where the direction can change very quickly, for example, several times per time slot.

[0046] Figure 3 A diagram illustrating an example decomposed base station 300 architecture is shown. The decomposed base station 300 architecture may include one or more central units (CUs) 310 that may communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more decomposed base station units, such as a near real-time (near-RT) RAN intelligent controller (RIC) 325 via an E2 link, or a non-real-time (non-RT) RIC 315 associated with a service management and orchestration (SMO) framework 305, or both. The CU 310 may communicate with one or more distributed units (DUs) 330 via respective midhaul links, such as an F1 interface. The DU 330 may communicate with one or more radio units (RUs) 340 via respective fronthaul links. The RU 340 may communicate with respective UEs 106 via one or more radio frequency (RF) access links. In some implementations, a UE 106 may be served simultaneously by multiple RUs 340.

[0047] Each of these units (i.e., CU 310, DU 330, RU 340, near-RT RIC 325, non-RT RIC 315, and SMO framework 305) may include one or more interfaces, or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of these units or an associated processor or controller that provides instructions to the communication interface of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface that is configured to receive or send signals to one or more of the other units via a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, a transmitter, or a transceiver (such as a radio frequency (RF) transceiver) that is configured to receive or send signals, or both, to one or more of the other units via a wireless transmission medium.

[0048] In some aspects, CU 310 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), or service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 310. CU 310 may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 310 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 310 may be implemented to communicate with DU 330 for network control and signaling.

[0049] DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RU 340. In some aspects, DU 330 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling or modulation and demodulation, etc.) at least in part according to a functional split such as those defined by the 3rd Generation Partnership Project (3GPP). In some aspects, DU 330 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 330 or with control functions hosted by CU 310.

[0050] The lower layer functionality may be implemented by one or more RUs 340. In some deployments, a RU 340 controlled by a DU 330 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, or physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on a functional split (such as a lower layer functional split). In such an architecture, the RU 340 may be implemented to handle over-the-air (OTA) communications with one or more UEs 106. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration may enable the implementation of the DU 330 and the CU 310 in a cloud-based RAN architecture (such as a vRAN architecture).

[0051] The SMO framework 305 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 390) to perform network element lifecycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, and near-RT RIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 311) via the O1 interface. Additionally, in some specific implementations, the SMO framework 305 may communicate directly with one or more RUs 340 via the O1 interface. The SMO framework 305 may also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305 .

[0052] The non-RT RIC 315 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or in communication with the near-RT RIC 325 (such as via an A1 interface). The near-RT RIC 325 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 310, one or more DUs 330, or both, and the O-eNB with the near-RT RIC 325.

[0053] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 325 and may be received from a non-network data source or from a network function at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0054] Figure 4 402 and 452 according to some aspects of the present disclosure. In wireless telecommunications systems, the communication protocol architecture can take on many forms depending on the application. For example, in a 3GPP NR system, the signaling protocol stack is divided into non-access stratum (NAS, 458) and access stratum (AS, 402-406 and 452-457) layers and protocols. NAS protocol 458 provides an upper layer for UE 106 to communicate with core network 102 (refer to Figure 1 ). AS protocols 402-406 and 452-457 provide lower layers for signaling between the RAN 104 (e.g., gNB or other network node 108) and the UE 106.

[0055] Go to Figure 4 , the radio protocol architecture is illustrated with a user plane protocol stack 402 and a control plane protocol stack 452, which show their corresponding layers or sublayers. The radio bearers between the network node 108 and the UE 106 can be classified into data radio bearers (DRBs) for carrying user plane data corresponding to the user plane protocol 402; and signaling radio bearers (SRBs) for carrying control plane data corresponding to the control plane protocol 452.

[0056] In the AS, both the user plane 402 and the control plane 452 protocols include a physical layer (PHY) 402 / 452, a medium access control layer (MAC) 403 / 453, a radio link control layer (RLC) 404 / 454, and a packet data convergence protocol layer (PDCP) 405 / 455. PHY 402 / 452 is the lowest layer and implements various physical layer signal processing functions. The MAC layer 403 / 453 provides multiplexing between logical channels and transport channels and is responsible for various functions. For example, the MAC layer 403 / 453 is responsible for reporting scheduling information, priority processing and priority determination, and error correction through hybrid automatic repeat request (HARQ) operations. The RLC layer 404 / 454 provides functions such as sequence numbering, segmentation and reassembly of upper layer data packets, and duplicate packet detection. The PDCP layer 405 / 455 provides functions including header compression of upper layer data packets to reduce radio transmission overhead, security by encrypting data packets, and integrity protection and verification.

[0057] In the user plane protocol stack 402, the service data adaptation protocol (SDAP) layer 406 provides services and functions for maintaining the desired quality of service (QoS). In the control plane protocol stack 452, the radio resource control (RRC) layer 457 includes multiple functional entities for routing higher layer messages, handling broadcast and paging functions, establishing and configuring radio bearers, NAS message delivery between NAS and UE, etc.

[0058] The NAS protocol layer 458 provides various control functions between the UE 106 and the core network 102. These functions include, for example, registration management functionality, connection management functionality, and user plane connection activation and deactivation.

[0059] Figure 5 Various aspects of the present disclosure are schematically illustrated with reference to an orthogonal frequency division multiplexing (OFDM) waveform. One of ordinary skill in the art will appreciate that various aspects of the present disclosure may be applied to DFT-s-OFDMA waveforms in substantially the same manner as described below. That is, while some examples of the present disclosure may focus on OFDM links for clarity, it will be appreciated that the same principles may also be applied to DFT-s-OFDMA waveforms.

[0060] In some examples, a frame may refer to a predetermined time duration (e.g., 10 ms) for wireless transmission. And further, each frame may include a set of subframes (e.g., 10 subframes of 1 ms each). A given carrier may include one set of frames in the UL and another set of frames in the DL. Figure 5An expanded view of an exemplary downlink subframe 502 is illustrated, showing an OFDM resource grid 504. However, as will be readily apparent to one skilled in the art, the PHY transmit structure for any application may differ from the examples described herein, depending on any number of factors. Here, time is in units of OFDM symbols in the horizontal direction; and frequency is in units of subcarriers or tones in the vertical direction.

[0061] The resource grid 504 may schematically represent the time-frequency resources for a given antenna port. That is, in a multiple-input multiple-output (MIMO) implementation with multiple available antenna ports (described further below), a corresponding plurality of resource grids 504 may be used for communication. The resource grid 504 is divided into a plurality of resource elements (REs) 506. An RE (which is 1 subcarrier x 1 symbol) is the smallest discrete portion of the time-frequency grid and may contain a single complex value representing data from a physical channel or signal. Depending on the modulation utilized in a particular implementation, each RE may represent one or more bits of information. In some examples, a block of REs may be referred to as a physical resource block (PRB), or more simply a resource block (RB) 508, which may include any suitable number of consecutive subcarriers in the frequency domain. In one example, an RB may span 12 subcarriers (a number independent of the parameter set used). In some examples, depending on the parameter set, an RB may include any suitable number of consecutive OFDM symbols in the time domain.

[0062] A given UE typically utilizes only a subset of the resource grid 504. An RB may be the smallest resource unit that a scheduler may allocate to a UE. Thus, the more RBs scheduled for a UE, and the higher the modulation scheme selected for the air interface, the higher the data rate for the UE.

[0063] In this illustration, RB 508 occupies less than the entire bandwidth of subframe 502, with some subcarriers illustrated above and below RB 508. In a given implementation, subframe 502 may have a bandwidth corresponding to any number of one or more RBs 508. Additionally, RB 508 is shown as occupying less than the entire duration of subframe 502, although this is only one possible example.

[0064] Each 1 ms subframe 502 may include one or more adjacent time slots. Figure 5In the embodiment of the present invention, a subframe 502 includes four time slots 510 as an illustrative example. In some examples, a time slot may be defined according to a specified number of OFDM symbols with a given cyclic prefix (CP) length. For example, a time slot may include 7 or 14 OFDM symbols with a nominal CP. Other examples may include mini-time slots with shorter durations (e.g., one or two OFDM symbols). In some cases, a network node may occupy resources scheduled for ongoing time slot transmissions for the same or different UEs to transmit these mini-time slots.

[0065] The expanded view of one of the time slots 510 illustrates that the time slot 510 includes a control region 512 and a data region 514. Generally speaking, the control region 512 may carry a control channel (e.g., PDCCH), and the data region 514 may carry a data channel (e.g., PDSCH or PUSCH). Of course, a time slot may contain full DL, full UL, or at least one DL portion and at least one UL portion. Figure 5 The structures illustrated in are merely exemplary in nature, and different slot structures may be utilized and may include one or more regions in each of the control region and the data region.

[0066] Although not in Figure 5 508, but each RE 506 within an RB 508 may carry one or more physical channels, including a control channel, a shared channel, a data channel, etc. Other REs 506 within an RB 508 may also carry pilot signals or reference signals. These pilot signals or reference signals may be provided to a receiving device to perform channel estimation of the corresponding channel, which may enable coherent demodulation / detection of a control channel and / or a data channel within the RB 508.

[0067] In a downlink transmission, a transmitting device (e.g., a base station 108) may allocate one or more REs 506 (e.g., within a control region 512) to carry one or more downlink control channels. These downlink control channels include downlink control information (DCI) 114, which typically carries information originating from higher layers (such as a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), etc.) to one or more UEs 106. In addition, a network node may allocate one or more downlink REs to carry downlink physical signals that typically do not carry information originating from higher layers. These downlink physical signals may include a primary synchronization signal (PSS); a secondary synchronization signal (SSS); a demodulation reference signal (DM-RS); a phase tracking reference signal (PT-RS); a channel state information reference signal (CSI-RS); etc.

[0068] The network node may send synchronization signals PSS and SSS (collectively referred to as SS) in an SS block comprising 4 consecutive OFDM symbols, and in some examples, PBCH. In the frequency domain, the SS block may extend over 240 consecutive subcarriers. Of course, the present disclosure is not limited to this particular SS block configuration. Other non-limiting examples within the scope of the present disclosure may utilize more or less than two synchronization signals; may include one or more supplemental channels in addition to the PBCH; may omit the PBCH; and / or may use non-contiguous symbols for the SS block.

[0069] The PDCCH may carry downlink control information (DCI) for one or more UEs in a cell. This may include, but is not limited to, power control commands, scheduling information, grants, and / or assignments of REs for downlink and uplink transmissions.

[0070] In an uplink transmission, a transmitting device (e.g., UE 106) may utilize one or more REs 506 to carry one or more uplink control channels, such as a physical uplink control channel (PUCCH), a physical random access channel (PRACH), etc. These uplink control channels include uplink control information (UCI) 118, which typically carries information originating from higher layers. In addition, uplink REs may carry uplink physical signals that typically do not carry information originating from higher layers, such as a demodulation reference signal (DM-RS), a phase tracking reference signal (PT-RS), a sounding reference signal (SRS), etc. In some examples, the control information 118 may include a scheduling request (SR), i.e., a request for the network node 108 to schedule an uplink transmission. Here, in response to the SR sent on the uplink control channel 118 (e.g., PUCCH), the network node 108 may send downlink control information (DCI) 114, which may schedule resources for uplink packet transmission.

[0071] The uplink control information may also include hybrid automatic repeat request (HARQ) feedback, such as an acknowledgement (ACK) or negative acknowledgement (NACK), channel state information (CSI), or any other suitable uplink control information. HARQ is a technology known to those of ordinary skill in the art, in which a receiving device may verify the integrity of a packet transmission for accuracy, for example, using any suitable integrity check mechanism, such as a checksum or a cyclic redundancy check (CRC). If the receiving device confirms the integrity of the transmission, it may send an ACK, and if the integrity of the transmission is not confirmed, it may send a NACK. In response to the NACK, the sending device may transmit a HARQ retransmission, which may implement tracking combining, incremental redundancy, etc.

[0072] In addition to control information, one or more REs 506 (e.g., within the data region 514) may also be allocated for user data or traffic data. Such traffic may be carried on one or more traffic channels, such as, for downlink transmissions, on a physical downlink shared channel (PDSCH) or, for uplink transmissions, on a physical uplink shared channel (PUSCH).

[0073] Described above and in Figure 1 and Figure 5 The channels or carriers illustrated in are not necessarily all channels or carriers that may be utilized between the network node 108 and the UE 106, and one of ordinary skill in the art will recognize that other channels or carriers may be utilized in addition to those illustrated, such as other traffic, control, and feedback channels.

[0074] In some aspects of the present disclosure, a network node and / or a UE may be configured with multiple antennas for beamforming and / or multiple-input multiple-output (MIMO) techniques. Figure 6 An example of a wireless communication system 600 with multiple antennas, supporting beamforming and / or MIMO is illustrated. The use of such multiple antenna technology enables the wireless communication system to exploit the spatial domain to support spatial multiplexing, beamforming, and transmit diversity.

[0075] Beamforming generally refers to directional signal transmission or reception. For beamforming transmission, the transmitting device may pre-code or control the amplitude and phase of each antenna in the antenna array to create a desired (e.g., directional) pattern of constructive and destructive interference in the wavefront. In a MIMO system, the transmitter 602 includes multiple transmit antennas 604 (e.g., N transmit antennas), and the receiver 606 includes multiple receive antennas 608 (e.g., M receive antennas). Therefore, there are N×M signal paths 610 from the transmit antenna 604 to the receive antenna 608. Each of the transmitter 602 and the receiver 606 may be implemented, for example, within the scheduling entity 108, the scheduled entity 106, or any other suitable wireless communication device.

[0076] In a MIMO system, spatial multiplexing can be used to simultaneously transmit multiple different data streams (also referred to as layers) on the same time-frequency resources. In some examples, transmitter 602 can transmit multiple data streams to a single receiver. In this way, MIMO systems take advantage of the capacity gains and / or increased data rates associated with using multiple antennas in a rich scattering environment where channel variations can be tracked. Here, receiver 606 can track these channel variations and provide corresponding feedback to transmitter 602. In an example scenario, as shown in FIG. Figure 6As shown, a rank 2 (i.e., including 2 data streams) spatial multiplexing transmission on a 2x2 MIMO antenna configuration will transmit two data streams via two transmit antennas 604. The signal from each transmit antenna 604 arrives at each receive antenna 608 along a different signal path 610. The receiver 606 can then use the received signal from each receive antenna 608 to reconstruct the data stream.

[0077] The number of data streams or layers in a MIMO or MU-MIMO (commonly referred to as MIMO) system corresponds to the rank of transmission. In general, the rank of a MIMO system is limited to the lower of the number of transmit antennas 604 or receive antennas 608. In addition, the channel conditions at the receiver 606 and other considerations (such as the available resources at the transmitter 602) may also affect the transmission rank. For example, a base station in a RAN (e.g., a transmitter 602) may assign a rank (and therefore, the number of data streams) for DL ​​transmission to a particular UE (e.g., a receiver 606) based on a rank indicator (RI) sent by the UE to the base station. The UE may determine the RI based on the antenna configuration (e.g., the number of transmit antennas and receive antennas) and the signal to interference and noise ratio (SINR) measured on each receive antenna. For example, the RI may indicate the number of layers that the UE can support under the current channel conditions. The base station may use the RI together with resource information (e.g., available resources and the amount of data to be scheduled for the UE) to assign a DL transmission rank to the UE.

[0078] The transmitter 602 determines the precoding of the one or more data streams being transmitted based on, for example, known channel state information of the channel on which the transmitter 602 transmits the data streams. For example, the transmitter 602 may transmit one or more suitable reference signals (e.g., channel state information reference signals or CSI-RS) that the receiver 606 may measure. The receiver 606 may then report the measured channel quality information (CQI) back to the transmitter 602. This CQI typically reports the current communication channel quality and, in some examples, reports the requested transport block size (TBS) for future transmissions to the receiver. In some examples, the receiver 606 may further report a precoding matrix indicator (PMI) to the transmitter 602. The PMI typically reports the preferred precoding matrix of the receiver 606 for use by the transmitter 602 and may be indexed into a predefined codebook. The transmitter 602 may then utilize the CQI / PMI to determine a suitable precoding matrix for transmission to the receiver 606.

[0079] In the upcoming 5G NR release, the UE's ability to transmit uplink MIMO transmissions will increase from a maximum of 4 layers to a maximum of 8 layers. That is, 8-layer uplink MIMO is a new feature being standardized. As a result of this change, there are possible further associated features / enhancements. Among these is uplink power boost for PT-RS transmissions.

[0080] PT-RS

[0081] Oscillator phase noise generally increases with carrier frequency. Therefore, especially for higher frequencies (e.g., FR2 or mmWave communications), phase noise may introduce significant common phase errors or common phase rotations of subcarriers in the OFDM signal. The Phase Tracking Reference Signal (PT-RS) enables tracking the phase of the local oscillator at the UE to compensate for such phase noise.

[0082] Figure 7 An example of an OFDM symbol 700 including two PT-RS tones 704 and 706 is illustrated. PT-RS is typically transmitted in a single layer. That is, each PT-RS tone 704, 706 transmits a single PT-RS port. In order to transmit multiple PT-RS ports, multiple PT-RS tones 704, 706 are transmitted in a given OFDM symbol 700 using frequency division multiplexing (FDM). For example, PT-RS may be transmitted in every second resource block (RB), every fourth RB, and so on.

[0083] Since each PT-RS tone is a single layer transmission, the UE may be able to "borrow" power from the muting layer on the PT-RS tone, depending on the pre-decoder used by the UE for the PUSCH transmission 702 and the capabilities of the UE's power amplifier. In other words, the single layer PT-RS tones 704, 706 may receive a power boost depending on the pre-decoder used for the PUSCH transmission 702 and the capabilities of the UE's power amplifier.

[0084] The magnitude of the PT-RS power boost depends on several factors. In some examples, one factor is the power amplifier capability of the UE. For example, some UEs may be considered to have (or be configured to have) a "small" power amplifier, where the full power that each power amplifier can generate is equal to the following amount: (the full power of the UE's power class) / (the number of transmit layers). Other UEs may be considered to have a "large" power amplifier, where the full power that each power amplifier can generate is equal to the full power of the UE's power class. In some examples, the configuration of a given UE with "small" and "large" power amplifier capabilities may be configured by the serving cell. That is, the serving cell may send an appropriate control message (e.g., RRC parameter ptrs-Power) to configure the UE for "small" or "large" power amplifier functionality, as described above.

[0085] According to the 3GPP Release 15 specification for 5G NR, for UEs where each power amplifier can support full power transmission for the power class of the UE (i.e., "large" power amplifier functionality, where ptrs-Power=01), the power ratio of PT-RS to PUSCH may be equal to 10log 10 (number of layers). And for UEs where not every power amplifier can support full-power transmission with respect to the UE's power class (i.e., "small" power amplifier functionality, where ptrs-Power=00), the power ratio of PT-RS to PUSCH may depend on whether the predecoder is fully coherent, partially coherent, or non-coherent. One of ordinary skill in the art will understand the difference between fully coherent, partially coherent, and non-coherent predecoders. In short, the precoding matrix represents the weights applied to each antenna (represented by the rows of the matrix) for each PUSCH port (represented by the columns of the matrix). For a fully coherent precoder, all elements in the precoding matrix are non-zero; for a non-coherent precoder, each column of the precoding matrix (corresponding to each PUSCH port) has a single non-zero element; for a partially coherent precoder, at least one column of the precoding matrix has two or more non-zero elements (but at least one element in the matrix is ​​equal to zero).

[0086] For configurations with fully coherent precoders, and for configurations with "large" power amplifier functionality (ptrs-Power=01), the PT-RS to PUSCH power ratio (in dB) is given as 10log 10 (Number of PUSCH layers).

[0087] For a non-coherent interdecoder, for a “small” power amplifier functionality (ptrs-Power=00), the PT-RS power ratio (in dB) is 10log 10 (Q p ), where Q p ∈{1,2} represents the number of PT-RS ports that the UE is configured with (maximum 2 PT-RS ports).

[0088] And in terms of partially correlated precoders, for "small" power amplifier functionality (ptrs-Power=00), the PT-RS to PUSCH power ratio depends on the number of PUSCH layers. If the number of PUSCH layers is 3 or less, the PT-RS to PUSCH power ratio (in dB) is 10log 10 (Q p). If the number of PUSCH layers is 4, the power ratio of PT-RS to PUSCH (in dB) is 10log 10 (Q p +3). These values ​​are summarized in Figure 8 shown in the table.

[0089] like Figure 8 As shown, for single-layer PUSCH, PT-RS power boost is not available. Therefore, for all cases, including "small" and "large" power amplifier functionality, the value of PT-RS power boost is 0dB. However, for multi-layer PUSCH (e.g., 2, 3, and 4 layers of PUSCH), PT-RS power boost may be available to borrow power from the silent layer. For example, in terms of fully correlated precoder, for 2-layer PUSCH, the PT-RS to PUSCH power ratio for both "small" and "large" power amplifier functionality may be 10log 10 (2) = 3dB. For 3-layer PUSCH, the power ratio of PT-RS to PUSCH can be 10log 10 (3) = 4.77 dB. And for 4-layer PUSCH, the power ratio of PT-RS to PUSCH is 10log 10 (4) = 6dB.

[0090] For partially coherent and non-coherent pre-decoders, the PT-RS to PUSCH power ratio can be 10log for 2-layer and 3-layer PUSCH. 10 (Q p ). For "small" power amplifier functionality, this Figure 8 3Q p –3dB, which is equivalent to 10log for up to 2 PT-RS ports 10 (Q p ). And for "large" power amplifier functionality, this is Figure 8 It is illustrated as 3dB for 2 layers and 4.77dB for 3 layers.

[0091] And for 4-layer PUSCH, with partial inter-decoder, for "small" power amplifier functionality (ptrs-Power=00), the power ratio of PT-RS to PUSCH can be 10log 10 (Q p +3). This is exemplified as 3Q p dB, which is equivalent to 10log for up to 2 PT-RS ports 10 (Q p+3). And for a non-coherent pre-decoder, for a "small" power amplifier functionality, the power ratio of PT-RS to PUSCH can be 10log 10 (Q p ), for up to 2 PT-RS ports, it is equivalent to 3Q p –3dB.

[0092] As described above, newer versions of 5G NR (e.g., specified for Release 18 specifications) are expanding from a maximum of 4 layers for uplink MIMO to a maximum of 8 layers. In various aspects, the present disclosure provides rules for PT-RS power boosting for up to 8 layers of PUSCH.

[0093] like Fig. 9 As illustrated, a UE with the ability to utilize 8 layers of PUSCH may have 8 antenna ports. This may be implemented in different UEs, for example, with a set of 4 antenna panels 902 or a set of 2 antenna panels 904. As will be appreciated by one of ordinary skill in the art, in the first example 902 with 4 antenna panels, there may be 4 associated local oscillators, one for each antenna panel. Therefore, in one aspect of the present disclosure, in order to support 8 layers of PUSCH transmission, the maximum number of PT-RS ports may be increased from 2 to 4. In this way, PT-RS transmission may provide compensation for phase noise from the 4 local oscillators. In the second example 204 with 2 antenna panels, there may be 2 associated local oscillators, one for each antenna panel. Therefore, some devices capable of supporting 8 layers of PUSCH may only require 2 PT-RS ports.

[0094] According to one aspect of the present disclosure, in the case of 8-layer uplink MIMO, for configurations with fully coherent precoders, and for configurations with "large" power amplifier functionality (ptrs-Power=01), the PT-RS to PUSCH power ratio (in dB) for any number of PUSCH layers (up to 8 layers) can be 10log 10 (Number of PUSCH layers). These values ​​are in Fig.10 In other words, Fig.10 Reproduced for up to 4 PUSCH layers Figure 8 and extended to up to 8 layers for 8x uplink MIMO.

[0095] For a configuration with non-coherent precoder and with “small” power amplifier functionality (ptrs-Power=00), the PT-RS to PUSCH power ratio (in dB) can be 10log 10 (Qp ), where Q p ∈{1,2,3,4} represents the number of PT-RS ports (up to 4 PT-RS ports). These values ​​are Fig.10 is exemplified in the table as 10log 10 (Q p ).

[0096] According to another aspect of the present disclosure, for a configuration with a partially phased precoder and with "small" power amplifier functionality (ptrs-Power=00), the power ratio of PT-RS to PUSCH may be configured for each PT-RS port. That is, for different PT-RS ports, the power ratio of PT-RS to PUSCH may be different.

[0097] For example, Fig.11 An example of layer mapping of 5 PUSCH layers corresponding to 4 antenna panels 1110 to 4 PT-RS ports is illustrated. In the illustrated example, for a UE configured for a "small" power amplifier (ptrs-Power=00), 5 layers of PUSCH are mapped to 4 corresponding PT-RS ports. For this example, the precoding matrix is ​​partially coherent. Three of these ports (ports 0, 1, and 2: 1110-1, 1110-2, and 1110-3) are mapped to one layer, and one of these ports (port 3: 1110-4) is mapped to 2 layers. According to one aspect of the present disclosure, the UE may individually determine the PT-RS power boost for each of the PT-RS ports. For example, see again Fig.10 , which illustrates a table showing the PT-RS to PUSCH power ratio for up to 8 PUSCH layers, which the UE can refer to separately for each PT-RS port. Thus, for PT-RS ports 0, 1, and 2, each mapped to one layer, 0 dB of PT-RS power boost (i.e., no boost) is available. And for PT-RS port 3, mapped to 2 layers, the power boost depends on the 2x2 (sub) pre-decoder matrix used for this port 1110-4. If the corresponding 2x2 (sub) pre-decoder is fully coherent, then according to Fig.10 , the UE may apply a 3dB power boost to the corresponding PT-RS tone. If the corresponding 2x2 (sub) pre-decoder matrix is ​​partially coherent or incoherent, then according to Fig.10 The UE can convert 10log 10 (Q p ) is applied to the corresponding PT-RS frequency modulation. Here, due to the existence of Q p = 4 PT-RS frequencies, so the UE can use 10log 10(4) = 6dB boost is applied to the corresponding PT-RS tone.

[0098] Fig.12 Another example of mapping 5 PUSCH layers to 2 PT-RS ports corresponding to 2 antenna panels 1210 is illustrated. In the illustrated example, for a UE configured with a "small" power amplifier (ptrs-Power=00), 5 layers of PUSCH are mapped to 2 corresponding PT-RS ports. For this example, the precoding matrix is ​​partially coherent. One of these ports (port 0: 1210-1) is mapped to two layers, and one of these ports (port 1: 1210-2) is mapped to 3 layers. According to one aspect of the present disclosure, the UE may individually determine the PT-RS power boost for each of the PT-RS ports. For example, see again Fig.10 , the UE can refer to this table separately for each PT-RS port. Therefore, for PT-RS port 0 mapped with 2 layers, the PT-RS power boost depends on the 4x2 (sub) pre-decoder matrix used for this port 1210-1. If the corresponding 4x2 (sub) pre-decoder is fully coherent, then according to Fig.10 , the UE may apply a 3dB power boost to the corresponding PT-RS tone. If the corresponding 4x2 (sub) pre-decoder matrix is ​​partially coherent or incoherent, then according to Fig.10 The UE can convert 10log 10 (Q p )=10log10(2)=3dB boost is applied to the corresponding PT-RS tone. And for PT-RS port 1 mapped with 3 layers, the power boost also depends on the 4x3 (sub) pre-decoder matrix used for this port 1210-2. If the corresponding 4x3 (sub) pre-decoder matrix is ​​fully coherent, then according to Fig.10 , the UE can apply a 4.77dB boost. If the corresponding 4x3 (sub)predecoder matrix is ​​partially coherent or incoherent, then according to Fig.10 The UE can convert 10log 10 (Q p )=10log10(2)=3dB boost is applied to the corresponding PT-RS frequency modulation.

[0099] Therefore, if Fig.11 and Fig.12 As shown in the illustrative example of , since the UE can individually determine the PT-RS power boost for each PT-RS port in the PT-RS port, the PT-RS power boost for one PT-RS port can be different from the PT-RS power boost for another different PT-RS port.

[0100] Fig.13 is a schematic diagram showing details of another technique for determining PT-RS power boost according to another aspect of the present disclosure. In this figure, for illustrative purposes only, similar to Fig.12 , 5 layers of uplink MIMO transmission are mapped to 2 PT-RS ports corresponding to a 2-panel UE capable of supporting 8x uplink MIMO. Of course, in other examples, any suitable number of layers (e.g., up to 8 layers) may be mapped to any suitable number of PT-RS ports (e.g., up to 4 ports). The illustrated example also corresponds to a UE configured for "small" power amplifier functionality (ptrs-Power=00). As in Fig.12 In the example of , the layer mapping function 1302 maps 2 layers to panel 1 1304 and maps 3 layers to panel 2 1306.

[0101] In this example, the lookup table 1308 (e.g., Fig.10 1308 is used to determine a preliminary parameter β, and an operator 1310 is applied to the preliminary parameter β to determine the power boost to be applied to the corresponding PT-RS port. In this example, each lookup table 1308 depends on three input parameters: the number of PUSCH layers mapped to the corresponding PT-RS port, the RRC parameter ptrs-Power, and a parameter indicating whether the (sub) pre-decoder matrix for the corresponding panel is fully coherent, partially coherent, or incoherent. Fig.12 In the described example, the first lookup table 1308 takes as input a 2-layer PUSCH transmission, a ptrs-Power parameter of 00, and an indication that the (sub)predecoder matrix for the first panel 1304 is a fully correlated predecoder (as an example). Fig.10 The preliminary parameter β of the first lookup table 1308-1 is 3 dB. The second lookup table 1308-2 takes as input the 3-layer PUSCH transmission, the ptrs-Power parameter 00, and an indication that the (sub) pre-decoder matrix for the second panel 1306 is a fully correlated pre-decoder (as an example). Therefore, according to Fig.10 The preliminary parameter β of the second lookup table 1308-2 is 4.77dB.

[0102] In various examples, any suitable function or operator may be applied by the operator block 1310. For example, the operator block 1310 may be an identity function such that α=β. As another example, the operator block 1310 may apply a maximum function, where the output value of α is equal to the maximum value of the input preliminary parameter β or some other suitable value that may be configured by the UE. As an example for illustrative purposes, the operator block 1310 may apply the function α=max{β,10log10 (Q p )}. That is, the power boost α to be applied to the PT-RS frequency modulation is β or 10log 10 (Q p ) is the larger of the values ​​of Fig.13 In the example illustrated in and described above, the first PT-RS boost value α0=max{β0,10log 10 (Q p )}=max{3dB,3dB}=3dB. And the second PT-RS boost value α1=max{β1,10log 10 (Q p )}=max{4.77dB,3dB}=4.77dB.

[0103] In another aspect, the operator block 1310 may apply a summation function where the output value of α is equal to the sum of the input preliminary parameter β and some other suitable value that may be configured by the UE. As an example for illustrative purposes, the operator block 1310 may apply the function α=β+10log 10 (Q p ). That is, the power boost α to be applied to the PT-RS frequency modulation is β times 10log 10 (Q p ). Therefore, in Fig.13 In the example illustrated in and described above, the first PT-RS boost value α0=3dB+3dB=6dB. And the second PT-RS boost value α1=4.77dB+3dB=7.77dB.

[0104] This example (where operator block 1310 is a sum function) can be written in a simplified manner. That is, α = β + 10log 10 (Q p )=10log 10 (Q p *L), where L represents the number of PUSCH layers transmitted by the PUSCH port mapped to the corresponding PT-RS port. For example, see again Fig.13 , there are 2 layers mapped to the first PT-RS port 1304. Therefore, the first PT-RS boost value α0 = 10log 10 (Q p *L), = 10log10(2*2) = 6dB. And the second PT-RS boost value α1 = 10log 10 (Q p *L),=10log10(2*3)=7.78dB.

[0105] In another aspect, operator block 1310 may apply a minimum function, where the output value of α is equal to the minimum value of the summation function just described above or some other suitable parameter that may be configured by the UE. As an illustrative example, operator block 1310 may apply the function α=min{10log 10 (Q p *L),10log 10 (total number of PUSCH layers)}. That is, the power boost α to be applied to the PT-RS frequency modulation is the sum function 10log 10 (Q p *L) or 10log 10 (the total number of PUSCH layers) is the smaller one. Fig.13 In the example illustrated in and described above, the first PT-RS boost value α0=min{10log 10 (Q p *L),10log10(5)}=min{6dB,6.99dB}=6dB. And the second PT-RS boost value α1=min{10log 10 (Q p *L),10log10(5)}=min{7.78dB,6.99dB}=6.99dB.

[0106] Fig.14 14 is a block diagram illustrating an example of a hardware implementation for a base station 1400 employing a processing system 1414. For example, the base station 1400 may be as described in Figure 1 , Figure 2 and / or Figure 3 A base station as illustrated in any one or more of .

[0107] The network node 1400 may include a processing system 1414 having one or more processors 1404. Examples of processors 1404 include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. In various examples, the network node 1400 may be configured to perform any one or more of the functions described herein. For example, the processor 1404 as utilized in the network node 1400 may be configured (e.g., in coordination with the memory 1405) to implement the functions described below and in Fig.16 and any one or more of the processes and procedures illustrated in Figure 114.

[0108] The processing system 1414 may be implemented using a bus architecture, generally represented by bus 1402. Bus 1402 may include any number of interconnecting buses and bridges, depending on the specific application of the processing system 1414 and the overall design constraints. Bus 1402 communicatively couples various circuits including one or more processors (generally represented by processor 1404), memory 1405, and computer-readable media (generally represented by computer-readable media 1406). Bus 1402 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further. Bus interface 1408 provides an interface between bus 1402 and transceiver 1410. Transceiver 1410 provides a communication interface or component for communicating with various other devices via a transmission medium. Depending on the nature of the device, a user interface 1412 (e.g., keypad, display, speaker, microphone, joystick) may also be provided. Of course, such a user interface 1412 is optional, and some examples (such as base stations) may omit it.

[0109] In some aspects of the present disclosure, processor 1404 may include a communication controller 1440 configured (e.g., in coordination with memory 1405) for various functions, including, for example, sending and / or receiving user data and / or control signaling to and / or from a wireless UE. Processor 1404 may also include a PT-RS measurement circuit 1442 configured (e.g., in coordination with memory 1405) for various functions, including, for example, measuring one or more PT-RS transmissions at the UE and compensating for phase noise.

[0110] The processor 1404 is responsible for managing the bus 1402 and general processing, including executing software stored on the computer-readable medium 1406. The software, when executed by the processor 1404, causes the processing system 1414 to perform the various functions described below for any particular device. The processor 1404 may also use the computer-readable medium 1406 and the memory 1405 for storing data that the processor 1404 manipulates when executing the software.

[0111] One or more processors 1404 in the processing system can execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language or other. The software may reside on a computer-readable medium 1406. The computer-readable medium 1406 may be a non-transitory computer-readable medium. Non-transitory computer-readable media include, for example, magnetic storage devices (e.g., hard disks, floppy disks, magnetic strips), optical disks (e.g., compact discs (CDs) or digital versatile discs (DVDs)), smart cards, flash memory devices (e.g., cards, sticks or key drives), random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, removable disks, and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. The computer readable medium 1406 may reside in the processing system 1414, be external to the processing system 1414, or be distributed across multiple entities including the processing system 1414. The computer readable medium 1406 may be embodied in a computer program product. For example, a computer program product may include a computer readable medium in packaging materials. Those skilled in the art will recognize how to best implement the described functionality presented throughout this disclosure, depending on the specific application and the overall design constraints imposed on the overall system.

[0112] In one or more examples, the computer-readable storage medium 1406 may store computer-executable code including communication control instructions 1462 that configure the base station 1400 for various functions, including, for example, sending and / or receiving user data and / or control signaling to and / or from a wireless UE. The computer-readable storage medium 1406 may also store computer-executable code including PT-RS measurement instructions 1464 that configure the base station 1400 for various functions, including, for example, measuring one or more PT-RS transmissions at the UE and compensating for phase noise.

[0113] Of course, in the above examples, the circuits included in the processor 1404 are provided only as examples, and other components for performing the described functions may be included in various aspects of the present disclosure, including but not limited to storage in the computer-readable storage medium 1406, or in Figure 1 , Figure 2 and / or Figure 3 In any other suitable device or component described in any of the foregoing and utilizing, for example, Fig. 9 and / or Fig.10Instructions for the described processes and / or algorithms.

[0114] Fig.15 1500 is a conceptual diagram illustrating an example of a hardware implementation for an exemplary UE 1500 employing a processing system 1514. According to various aspects of the present disclosure, the processing system 1514 may include an element, or any portion of an element, or any combination of elements, having one or more processors 1504. For example, the UE 1500 may be as in Figure 1 , Figure 2 and / or Figure 3 A user equipment (UE) is illustrated in any one or more of the embodiments.

[0115] Processing system 1514 may be used with Fig.14 The processing system 1414 illustrated in FIG. 1 is substantially the same as that illustrated in FIG. 1 , which includes a bus interface 1508, a bus 1502, a memory 1505, a processor 1504, and a computer-readable medium 1506. In addition, the UE 1500 may include substantially the same as that described above in FIG. Fig.14 A user interface 1512 and transceiver 1510 similar to those described in .

[0116] In some examples, transceiver 1510 may include multiple antenna panels, each such antenna panel having an associated local oscillator. Fig. 9 A configuration with four antenna panels and a configuration with two antenna panels are schematically illustrated. However, the transceiver 1510 may include any suitable number of antenna panels. In a further example, the transceiver 1510 may include a plurality of power amplifiers that may be configured according to the RRC parameter ptrs-Power. For example, the transceiver 1510 may include a plurality of power amplifiers that may be configured for "small" or "large" functionality in some examples. Here, the "small" power amplifier configuration indicates that the full power that each power amplifier can generate is equal to the following amount: (full power of the UE's power class) / (number of transmit layers). And the "large" power amplifier configuration indicates that the full power that each power amplifier can generate is equal to the full power of the UE's power class.

[0117] The processor 1504 as utilized in the UE 1500 may be configured (eg, in coordination with the memory 1505) to implement the following and Fig.16 and / or Fig.17 Any one or more of the processes illustrated in .

[0118] In some aspects of the present disclosure, the processor 1504 may include a communication controller 1540 configured (e.g., in coordination with the memory 1505) for various functions, including, for example, sending and / or receiving user data and / or control signaling (including reference signals) to and / or from a base station. The processor 1504 may also include a transmit power booster 1542 configured (e.g., in coordination with the memory 1505) for various functions, including, for example, determining a transmit power boost for a PT-RS port among a plurality of PT-RS ports. The transmit power booster 1542 may also coordinate with the transceiver 1510 to determine a transmit power for PT-RS transmission and transmit the PT-RS.

[0119] And further, the computer-readable storage medium 1506 may store computer-executable code including communication control instructions 1560 that configure the UE 1500 for various functions, including, for example, sending and / or receiving user data and / or control signaling (including reference signals) to and / or from a base station. The computer-readable storage medium 1506 may also store computer-executable code including transmit power boost instructions 1562 that configure the UE 1500 for various functions, including, for example, determining a transmit power boost for a PT-RS port among a plurality of PT-RS ports. The transmit power boost instructions 1562 may also cause the processor 1504 to coordinate with the transceiver 1510 to determine a transmit power for PT-RS transmission and to transmit the PT-RS.

[0120] Of course, in the above examples, the circuits included in the processor 1504 are provided only as examples, and other components for performing the described functions may be included in various aspects of the present disclosure, including but not limited to storage in the computer-readable storage medium 1506, or in Figure 1 , Figure 2 and / or Figure 3 In any other suitable device or component described in any of the foregoing and utilizing, for example, Fig.16 and / or Fig.17 Instructions for the described processes and / or algorithms.

[0121] Fig.16 1 is a call flow diagram illustrating an exemplary UE 1500 communicating with an exemplary base station 1400 according to one aspect of the present disclosure. For purposes of illustration, the UE 1500 may be Fig.15 The same UE 1500 illustrated in FIG. 1 and the base station 1400 may be Fig.14 The same base station 1400 illustrated in .

[0122] At any suitable time after the radio connection is established, the UE 1500 may communicate a set of UE capability information 1602 to its serving cell. The UE capability information 1602 may include various capabilities of the UE 1500. According to one aspect of the present disclosure, the UE capability information 1602 may be configured to report to the network capabilities indicating the power amplifier capabilities of the UE 1500. For example, see Fig.10 , the UE 1500 may report whether it is capable of supporting "small" power amplifier functionality (ptrs-Power=00), "large" power amplifier functionality (ptrs-Power=01), or both. In some examples, the UE capability information 1602 may have a per-UE granularity, where one common capability indication applies to all PUSCH layers. In another example, the UE capability information 1602 may have a per-PUSCH layer granularity, where separate capabilities are reported for each PUSCH layer or each subset of PUSCH layers. For example, a given UE may have the capability to use "large" power amplifier functionality for a subset of PUSCH layers, but may have the capability to use only "small" power amplifier functionality for another subset of PUSCH layers.

[0123] At 1604, the base station 1400 may send RRC configuration information to the UE 1500. For example, the base station 1400 may provide an RRC configuration of the parameter ptrs-Power, which may indicate which row in the lookup table to apply (row 00 for "small" power amplifier functionality or row 01 for "large" power amplifier functionality). In some examples, the RRC configuration message 1604 may have a per-UE granularity, where one common power amplifier functionality is configured for all PUSCH layers. In another example, the RRC configuration message 1604 may have a per-PUSCH layer granularity, where a separate power amplifier functionality is configured for each PUSCH layer or each subset of PUSCH layers. For example, a given UE may be configured to utilize a "large" power amplifier functionality for a subset of PUSCH layers, but may be configured to utilize a "small" power amplifier functionality for another subset of PUSCH layers.

[0124] Once the UE 1400 is configured, the network may send a grant 1606 to the UE 1500. For example, the grant 1606 may grant or schedule radio resources for the UE 1500 to use for an uplink transmission (e.g., a PUSCH). At block 1608, the UE 1500 may determine a transmit power boost for one or more PT-RS ports to be sent with the scheduled uplink transmission. For example, the UE 1500 may determine a first transmit power boost for a first PT-RS port, and a second transmit power boost for a second PT-RS port, the second transmit power boost being different from the first transmit power boost. Fig.171700 is a flow chart illustrating further details of a process 1700 for determining a transmit power boost for a PT-RS port according to some aspects of the present disclosure. As described below, certain implementations may omit some or all of the illustrated features, and some of the illustrated features may not be required to implement all embodiments. In some examples, Fig.15 The UE 1500 illustrated in FIG. 17 may be configured to perform process 1700. In some examples, any suitable device or component for performing the functions or algorithms described below may perform process 1700.

[0125] At block 1702, UE 1500 may map multiple layers of uplink transmissions to multiple PTRS ports by distributing the layers of the multiple layers of uplink transmissions among the multiple PTRS ports. For example, the communication controller 1540 of UE 1500 may include a layer mapping function for mapping multiple layers of uplink transmissions (e.g., up to 8 layers of uplink MIMO PUSCH transmissions) to multiple PT-RS ports corresponding to multiple antenna panels. In various examples, the multiple layers of uplink transmissions may be distributed among the multiple PT-RS ports in any suitable manner. That is, via the layer mapping function, the same number or different numbers of PUSCH layers may be mapped to corresponding PT-RS ports.

[0126] At block 1704, UE 1500 may determine a first transmit power boost for a first PT-RS port of the plurality of PT-RS ports. For example, Tx power booster 1542 of UE 1500 may refer to a lookup table (e.g., Fig.10 ) to determine the first transmit power boost. As described above, in some examples, the value determined via the lookup table may depend on several parameters, including: the number of PUSCH layers mapped to the corresponding PT-RS port, a power amplifier configuration such as an RRC parameter ptrs-Power (i.e., whether UE 1500 is configured for a "small" or "large" power amplifier), and a (sub) pre-decoder configuration for the PUSCH layer mapped to the corresponding PT-RS port. In some examples, determining the first transmit power boost may additionally involve applying an operator to the value found by the lookup table, as described above. For example, the first transmit power boost may be the larger of the value found by the lookup table or the predetermined minimum power boost. In another example, the first transmit power boost may be the value found by the lookup table plus the predetermined power boost value. In yet another example, the first transmit power boost may be the smaller of a power boost based on the value found by the lookup table or the predetermined maximum power boost.

[0127] And at block 1706, the UE 1500 may determine a second transmit power boost for a second PT-RS port of the plurality of PT-RS ports, the second transmit power boost being different from the first transmit power boost. Here, the UE 1500 may determine the second transmit power in the same manner as the first transmit power, with reference to the lookup table and corresponding to the associated PT-RS port. According to one aspect of the present disclosure, since the power determination for the second transmit power boost is separate or independent from the power determination for the first transmit power boost, the second transmit power boost may be different from the first transmit power boost depending on the value of the parameter input to the lookup table.

[0128] See also Fig.16 , the UE may utilize the determined transmit power boost to transmit PUSCH and PT-RS 1610. That is, at block 1708, the UE 1500 may utilize the first transmit power boost to transmit a first PT-RS corresponding to the first PT-RS port. And at block 1710, the UE 1500 may utilize the second transmit power boost to transmit a second PT-RS corresponding to the second PT-RS port, the second PT-RS being frequency division multiplexed with the first PT-RS. For example, the UE 1500 may cause the transceiver 1510 to transmit a multi-layer uplink MIMO transmission using multiple PT-RS ports.

[0129] With the PT-RS transmission 1610 , at block 1612 , the base station 1300 may measure the PT-RS and compensate for phase noise.

[0130] Other embodiments with various features:

[0131] Clause 1A: A method, apparatus, and non-transitory computer-readable medium for wireless communications are disclosed. A UE maps multiple layers of uplink transmissions to multiple phase tracking reference signal (PT-RS) ports, the mapping comprising distributing the layers of the multiple layers of uplink transmissions among the multiple PT-RS ports. The UE also determines a first transmit power boost for a first PT-RS port among the multiple PT-RS ports. The UE also determines a second transmit power boost for a second PT-RS port among the multiple PT-RS ports, the second transmit power boost being different from the first transmit power boost. The UE transmits a first PT-RS corresponding to the first PT-RS port using the first transmit power boost, and transmits a second PT-RS corresponding to the second PT-RS port using the second transmit power boost, the second PT-RS being frequency division multiplexed with the first PT-RS.

[0132] Clause 2A: A method, apparatus, and non-transitory computer-readable medium according to clause 1A, wherein determining the first transmit power boost for the first PT-RS port includes referencing a lookup table to determine the first transmit power boost based on: (1) the number of layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port; (2) a PT-RS power boost configuration; or (3) a first predecoder configuration for the layer of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port.

[0133] Clause 3A: The method, apparatus, and non-transitory computer-readable medium of any of clauses 1A to 2A, further comprising applying an operator to a value found by the lookup table.

[0134] Clause 4A: The method, apparatus, and non-transitory computer-readable medium of any of clauses 1A to 3A, wherein the operator is a maximum function that returns the greater of the value found by the lookup table or a predetermined minimum power boost.

[0135] Clause 5A: The method, apparatus, and non-transitory computer-readable medium of clause 4A, wherein the method, apparatus, and non-transitory computer-readable medium further comprise determining the predetermined minimum power boost based on the number of PT-RS ports in the plurality of PT-RS ports transmitted by the multi-layer uplink.

[0136] Clause 6A: The method, apparatus, and non-transitory computer-readable medium of any of Clauses 1A to 3A, wherein the operator is a summation function that returns the value found by the lookup table plus a predetermined power boost value.

[0137] Clause 7A: The method, apparatus, and non-transitory computer-readable medium of clause 6A, further comprising determining the predetermined power boost value based on a total number of layers of the multi-layer uplink transmission.

[0138] Clause 8A: The method, apparatus, and non-transitory computer-readable medium of any of clauses 1A to 3A, wherein the operator is a minimum function that returns the lesser of a first value based on the value found by the lookup table or a maximum power boost.

[0139] Clause 9A: The method, apparatus, and non-transitory computer-readable medium of clause 8A, further comprising determining the maximum power boost based on a total number of the layers of the multi-layer uplink transmission.

[0140] Clause 10A: The method, apparatus, and non-transitory computer-readable medium of any of clauses 1A to 3A, wherein the operator is the function:

[0141] α=min{10log 10 Q p *L 端口 ,10log 10 L 总数}

[0142] Wherein: α represents the first transmit power boost for the first PT-RS port; Q p represents the total number of PT-RS ports associated with the multi-layer uplink transmission; L 端口 represents the number of layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port; and L 总数 Indicates the total number of layers sent by the multi-layer uplink.

[0143] Clause 11A: A method, apparatus, and non-transitory computer-readable medium as described in any of clauses 1A to 10A, wherein determining the second transmit power boost for the second PT-RS port includes referencing a lookup table to determine the second transmit power boost based on: (1) the number of layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the second PT-RS port; (2) the PT-RS power boost configuration; or (3) a second predecoder configuration for the layer of the multi-layer uplink transmission sent by the PUSCH port mapped to the second PT-RS port.

[0144] Clause 12A: The method, apparatus, and non-transitory computer-readable medium of any of clauses 1A to 11A, further comprising sending a capability information message indicating an ability to utilize a PT-RS power boosting configuration.

[0145] Clause 13A: The method, apparatus, and non-transitory computer-readable medium of any of clauses 1A to 12A, wherein the capability information message comprises individual capabilities to use the PT-RS power boosting configuration for individual layers of the multi-layer uplink transmission.

[0146] Clause 14A: The method, apparatus, and non-transitory computer-readable medium of any of clauses 1A to 13A, further comprising receiving a configuration message indicating a PT-RS power boosting configuration.

[0147] Clause 15A: The method, apparatus, and non-transitory computer-readable medium of any of clauses 1A to 14A, wherein the configuration message comprises a separate configuration for the PT-RS power.

[0148] Clause 1B: A method of wireless communication, the method comprising: mapping a multi-layer uplink transmission to a plurality of phase tracking reference signal (PT-RS) ports, the mapping comprising distributing the layers of the multi-layer uplink transmission among the plurality of PT-RS ports; determining a first transmit power boost for a first PT-RS port among the plurality of PT-RS ports based on a number of layers of the multi-layer uplink transmission transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port of the plurality of PT-RS ports and a total number of PT-RS ports associated with the multi-layer uplink transmission; and transmitting a first PT-RS corresponding to the first PT-RS port using the first transmit power boost.

[0149] Clause 2B: A method according to clause 1B, wherein determining the first transmit power boost comprises: determining the first transmit power boost according to the following function: α=10log 10 (Q p *L), where α is the first transmit power boost, Q p is the total number of the PT-RS ports associated with the multi-layer uplink transmission, and L is the number of the layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port.

[0150] Clause 3B: A method according to clause 1B, wherein determining the first transmit power boost further includes: determining the first transmit power boost for the first PT-RS port based on the number of layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port among the multiple PT-RS ports, the total number of the PT-RS ports associated with the multi-layer uplink transmission, and the total number of layers of the multi-layer uplink transmission.

[0151] Clause 4B: A method according to clause 3B, wherein determining the first transmit power boost comprises: determining the first transmit power boost according to the following function: α = min{10log 10 Q p *L 端口 ,10log 10 L 总数}, where α is the first transmit power boost, min is the minimum function, Q p is the total number of PT-RS ports associated with the multilayer uplink transmission, and L端口 is the number of layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port, and L 总数 is the total number of the layers sent by the multi-layer uplink.

[0152] Clause 5B: A method according to any one of clauses 1B to 4B, wherein determining the first transmit power boost for the first PT-RS port further comprises: referring to a lookup table to determine the first transmit power boost based on: the number of layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port; a PT-RS power boost configuration; and a first predecoder configuration for the layer of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port.

[0153] Clause 6B: The method of clause 5B, further comprising: applying an operator to a value found by the lookup table.

[0154] Clause 7B: The method of clause 6B, wherein the operator is a maximum function that returns the greater of the value found by the lookup table or a predetermined minimum power boost.

[0155] Clause 8B: The method of clause 6B, wherein the operator is a summation function that returns the value found by the lookup table plus a predetermined power boost value.

[0156] Clause 9B: The method of clause 6B, wherein the operator is a minimum function that returns the lesser of a first value based on the value found by the lookup table or a maximum power boost.

[0157] Clause 10B: A method according to any one of clauses 1B to 9B, the method further comprising: determining a second transmit power boost for a second PT-RS port among the multiple PT-RS ports, the second transmit power boost being different from the first transmit power boost; and utilizing the second transmit power boost to transmit a second PT-RS corresponding to the second PT-RS port, the second PT-RS being frequency division multiplexed with the first PT-RS.

[0158] Clause 11B: A method as set forth in any of clauses 1B to 10B, the method further comprising: sending a capability information message indicating the capability to utilize a PT-RS power boosting configuration.

[0159] Clause 12B: The method of clause 11B, wherein the capability information message comprises individual capabilities to use the PT-RS power boosting configuration for individual layers of the multi-layer uplink transmission.

[0160] Clause 13B: A method as set forth in any of clauses 1B to 12B, further comprising: receiving a configuration message indicating a PT-RS power boost configuration.

[0161] Clause 14B: The method of clause 13B, wherein the configuration message comprises individual configurations of the PT-RS power boosting configurations for individual layers of the multi-layer uplink transmission.

[0162] Clause 15B: A device configured for wireless communication, the device comprising: one or more memories; and one or more processors, the one or more processors coupled to the one or more memories and configured to cause the device to: map multi-layer uplink transmissions to multiple phase tracking reference signal (PT-RS) ports, including distributing layers of the multi-layer uplink transmissions among the multiple PT-RS ports; determine a first transmit power boost for a first PT-RS port among the multiple PT-RS ports based on the number of layers of the multi-layer uplink transmissions transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port in the multiple PT-RS ports and the total number of PT-RS ports associated with the multi-layer uplink transmission; and transmit a first PT-RS corresponding to the first PT-RS port using the first transmit power boost.

[0163] Clause 16B: The apparatus of clause 15B, wherein to determine the first transmit power boost, the one or more processors are further configured to cause the apparatus to: determine the first transmit power boost according to the following function: α=10log 10 (Q p *L), where α is the first transmit power boost, Q p is the total number of the PT-RS ports associated with the multi-layer uplink transmission, and L is the number of the layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port.

[0164] Clause 17B: An apparatus according to clause 15B, wherein in order to determine the first transmit power boost, the one or more processors are further configured to cause the apparatus to: determine the first transmit power boost for the first PT-RS port based on the number of layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port among the multiple PT-RS ports, the total number of the PT-RS ports associated with the multi-layer uplink transmission, and the total number of layers of the multi-layer uplink transmission.

[0165] Clause 18B: The apparatus of clause 17B, wherein to determine the first transmit power boost, the one or more processors are further configured to cause the apparatus to: determine the first transmit power boost according to the following function:

[0166] α=min{10log 10 Q p *L 端口 ,10log 10 L 总数}, where α is the first transmit power boost, min is the minimum function, Q p is the total number of PT-RS ports associated with the multilayer uplink transmission, and L 端口 is the number of layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port, and L 总数 is the total number of the layers sent by the multi-layer uplink.

[0167] Clause 19B: An apparatus according to any one of clauses 15B to 18B, wherein in order to determine the first transmit power boost, the one or more processors are further configured to cause the apparatus to: refer to a lookup table to determine the first transmit power boost based on: the number of layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port; a PT-RS power boost configuration; and a first predecoder configuration for the layer of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port.

[0168] Clause 20B: The apparatus of clause 19B, wherein the one or more processors are further configured to cause the apparatus to: apply an operator to a value found by the lookup table.

[0169] Clause 21B: The device of clause 20B, wherein the operator is a maximum function that returns the greater of the value found by the lookup table or a predetermined minimum power boost.

[0170] Clause 22B: The apparatus of clause 20B, wherein the operator is a summation function that returns the value found by the lookup table plus a predetermined power boost value.

[0171] Clause 23B: The device of clause 20B, wherein the operator is a minimum function that returns the lesser of a first value based on the value found by the lookup table or a maximum power boost.

[0172] Clause 24B: An apparatus according to any one of clauses 15B to 23B, wherein the one or more processors are further configured to cause the apparatus to: determine a second transmit power boost for a second PT-RS port among the multiple PT-RS ports, the second transmit power boost being different from the first transmit power boost; and utilize the second transmit power boost to transmit a second PT-RS corresponding to the second PT-RS port, the second PT-RS being frequency division multiplexed with the first PT-RS.

[0173] Clause 25B: An apparatus as set forth in any of clauses 15B to 24B, wherein the one or more processors are further configured to cause the apparatus to: send a capability information message indicating an ability to utilize a PT-RS power boosting configuration.

[0174] Clause 26B: The apparatus of clause 25B, wherein the capability information message comprises individual capabilities for using the PT-RS power boosting configuration for individual layers of the multi-layer uplink transmission.

[0175] Clause 27B: An apparatus as set forth in any of clauses 15B to 26B, wherein the one or more processors are further configured to cause the apparatus to: receive a configuration message indicating a PT-RS power boosting configuration.

[0176] Clause 28B: The apparatus of clause 27B, wherein the configuration message comprises individual configurations of the PT-RS power boosting configurations for individual layers of the multi-layer uplink transmission.

[0177] Clause 29B: An apparatus configured for wireless communication, the apparatus comprising: means for mapping multi-layer uplink transmissions to multiple phase tracking reference signal (PT-RS) ports, the means for mapping comprising means for distributing layers of the multi-layer uplink transmissions among the multiple PT-RS ports; means for determining a first transmit power boost for a first PT-RS port among the multiple PT-RS ports based on the number of layers of the multi-layer uplink transmissions transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port of the multiple PT-RS ports and the total number of PT-RS ports associated with the multi-layer uplink transmission; and means for transmitting a first PT-RS corresponding to the first PT-RS port using the first transmit power boost.

[0178] Item 30B: A non-transitory computer-readable storage medium storing instructions that, when executed, cause one or more processors to: map a multi-layer uplink transmission to a plurality of phase tracking reference signal (PT-RS) ports, including distributing the layers of the multi-layer uplink transmission among the plurality of PT-RS ports; determine a first transmit power boost for a first PT-RS port among the plurality of PT-RS ports based on a number of layers of the multi-layer uplink transmission transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port of the plurality of PT-RS ports and a total number of PT-RS ports associated with the multi-layer uplink transmission; and transmit a first PT-RS corresponding to the first PT-RS port using the first transmit power boost.

[0179] The detailed description set forth above in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configuration in which the concepts described herein may be practiced. In order to provide a thorough understanding of the various concepts, the specific embodiments include specific details. However, those skilled in the art will readily appreciate that these concepts may be practiced without these specific details. In some cases, this specification provides well-known structures and components in block diagram form in order to avoid obscuring such concepts.

[0180] Although this specification describes certain aspects and examples with reference to some illustrations, it will be understood by those skilled in the art that additional specific implementations and use cases may be generated in many different arrangements and scenarios. The innovation described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, each specific implementation and / or use may be generated via an integrated chip (IC) implementation and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment, devices that enable artificial intelligence (AI), etc.). Although some examples may or may not specifically point to use cases or applications, the applicability of a wide range of described innovations may occur. The specific implementation may span the spectrum from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to the spectrum of aggregated, distributed, or original equipment manufacturer (OEM) devices or systems in conjunction with one or more aspects of the disclosed technology. In some practical environments, the device in conjunction with the various aspects and features described must also include additional components and features for the specific implementation and practice of the embodiments protected and described by the claims. For example, the transmission and reception of wireless signals includes several components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). It is intended that the disclosed technology can be practiced in various devices, chip-level components, systems, distributed arrangements, end-user devices, etc., having various sizes, shapes, and configurations.

[0181] By way of example, various aspects of the present disclosure may be implemented within systems defined by 3GPP, such as Fifth Generation New Radio (5GNR), Long Term Evolution (LTE), Evolved Packet System (EPS), Universal Mobile Telecommunications System (UMTS), and / or Global System for Mobile Communications (GSM). Various aspects may also be extended to systems defined by the Third Generation Partnership Project 2 (3GPP2), such as CDMA2000 and / or Evolution-Data Optimized (EV-DO). Other examples may be implemented within systems employing IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra Wideband (UWB), Bluetooth, and / or other suitable systems. The actual telecommunication standard, network architecture, and / or communication standard employed will depend on the specific application and the overall design constraints imposed on the system.

[0182] The present disclosure uses the word "exemplary" to mean "serving as an example, instance, or illustration". Any specific implementation or aspect described herein as "exemplary" is not necessarily to be construed as superior or superior to other aspects of the present disclosure. Likewise, the term "aspect" does not require that all aspects of the present disclosure include the discussed features, advantages, or modes of operation. The present disclosure uses the terms "coupled" and / or "communicatively coupled" to refer to a direct or indirect coupling between two objects. For example, if object A physically contacts object B, and object B contacts object C, objects A and C may still be considered to be coupled to each other, even if they are not in direct physical contact with each other. For example, a first object may be coupled to a second object, even if the first object has never been in direct physical contact with the second object. The present disclosure uses the terms "circuit" and "circuitry" broadly to include both hardware implementations of electronic devices and conductors (where these electronic devices and conductors, when connected and configured, implement the execution of the functions described in the present disclosure, without limitation on the type of electronic circuits) and software implementations of information and instructions (where these information and instructions, when executed by a processor, implement the execution of the functions described in the present disclosure).

[0183] Figures 1 to 17 One or more of the components, steps, features, and / or functions illustrated in the present invention may be rearranged and / or combined into a single component, step, feature, or function, or may be embodied in several components, steps, or functions. Additional elements, components, steps, and / or functions may also be added without departing from the novel features disclosed herein. Figures 1 to 17 The apparatus, device and / or components illustrated in the can be configured to perform one or more of the methods, features or steps described herein. The novel algorithms described herein can also be efficiently implemented in software and / or embedded in hardware.

[0184] It should be understood that the specific order or hierarchy of steps in the disclosed methods is an illustration of an exemplary process. It should be understood that the specific order or hierarchy of steps in these methods can be rearranged based on design preferences. The attached method claims present elements of various steps in an example order, but are not meant to be limited to the specific order or hierarchy presented unless explicitly stated herein.

[0185] The applicant provides this description to enable any person skilled in the art to practice the various aspects described herein. Those skilled in the art will readily recognize various modifications to these aspects, and the general principles defined herein may be applied to other aspects. The applicant does not intend that the claims be limited to the various aspects shown herein, but should be given the full scope consistent with the language of the claims, wherein unless specifically stated otherwise, references to elements in the singular form are not intended to mean "one and only one", but "one or more". Unless otherwise specifically stated, the present disclosure uses the term "some" to refer to one or more. The phrase "at least one" referring to a list of items refers to any combination of those items, including a single member. As an example, "at least one of a, b, or c" is intended to cover: a; b; c; a and b; a and c; b and c; and a, b, and c. All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure that are known or will be known later to those of ordinary skill in the art are expressly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly recorded in the claims. No claim element is to be construed under 35 USC §112(f) unless the element is expressly recited using the phrase “means for” or, in the case of a method claim, the phrase “step for.”

Claims

1. A method for wireless communication, the method comprising: mapping a multi-layer uplink transmission to a plurality of phase tracking reference signal (PT-RS) ports, the mapping comprising distributing layers of the multi-layer uplink transmission among the plurality of PT-RS ports; determining a first transmit power boost for a first PT-RS port among the plurality of PT-RS ports based on a number of layers of the multi-layer uplink transmission transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port and a total number of PT-RS ports associated with the multi-layer uplink transmission; as well as A first PT-RS corresponding to the first PT-RS port is transmitted using the first transmit power boost.

2. The method of claim 1 , wherein determining the first transmit power boost comprises: The first transmit power boost is determined according to the following function: α=10log 10 (Q p *L), where α is the first transmit power boost, Q p is the total number of the PT-RS ports associated with the multi-layer uplink transmission, and L is the number of the layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port.

3. The method of claim 1 , wherein determining the first transmit power boost further comprises: The first transmit power boost for the first PT-RS port is determined based on the number of layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port among the multiple PT-RS ports, the total number of the PT-RS ports associated with the multi-layer uplink transmission, and the total number of layers of the multi-layer uplink transmission.

4. The method of claim 3, wherein determining the first transmit power boost comprises: The first transmit power boost is determined according to the following function: α=min{10log 10 Q p *L 端口 ,10log 10 L 总数 }, Where α is the first transmit power boost, min is the minimum function, Q p is the total number of PT-RS ports associated with the multilayer uplink transmission, and L 端口 is the number of layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port, and L 总数 is the total number of the layers sent by the multi-layer uplink.

5. The method of claim 1 , wherein determining the first transmit power boost for the first PT-RS port further comprises: Refer to a lookup table to determine the first transmit power boost based on: the number of the layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port; PT-RS power boost configuration; as well as A first precoder configuration for the layer of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port.

6. The method according to claim 5, further comprising: Applies an operator to the value found by the lookup table.

7. The method of claim 6, wherein the operator is a maximum function that returns the greater of the value found by the lookup table or a predetermined minimum power boost.

8. The method of claim 6, wherein the operator is a summation function that returns the value found by the lookup table plus a predetermined power boost value.

9. The method of claim 6, wherein the operator is a minimum function that returns the lesser of a first value or a maximum power boost based on the value found by the lookup table.

10. The method according to claim 1, further comprising: determining a second transmit power boost for a second PT-RS port among the plurality of PT-RS ports, the second transmit power boost being different from the first transmit power boost; as well as The second transmit power boost is used to transmit a second PT-RS corresponding to the second PT-RS port, and the second PT-RS is frequency division multiplexed with the first PT-RS.

11. The method according to claim 1, further comprising: A capability information message is sent indicating the capability to utilize the PT-RS power boosting configuration.

12. The method of claim 11, wherein the capability information message includes individual capabilities of using the PT-RS power boosting configuration for individual layers of the multi-layer uplink transmission.

13. The method according to claim 1, further comprising: A configuration message indicating a PT-RS power boost configuration is received.

14. The method of claim 13, wherein the configuration message comprises individual configurations of the PT-RS power boosting configurations for individual layers of the multi-layer uplink transmission.

15. An apparatus configured for wireless communication, the apparatus comprising: one or more memories; and one or more processors coupled to the one or more memories and configured to cause the apparatus to: Mapping a multi-layer uplink transmission to a plurality of phase tracking reference signal (PT-RS) ports, comprising distributing layers of the multi-layer uplink transmission among the plurality of PT-RS ports; determining a first transmit power boost for a first PT-RS port among the plurality of PT-RS ports based on a number of layers of the multi-layer uplink transmission transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port and a total number of PT-RS ports associated with the multi-layer uplink transmission; as well as A first PT-RS corresponding to the first PT-RS port is transmitted using the first transmit power boost.

16. The apparatus of claim 15, wherein to determine the first transmit power boost, the one or more processors are further configured to cause the apparatus to: The first transmit power boost is determined according to the following function: α=10log 10 (Q p *L), where α is the first transmit power boost, Q p is the total number of the PT-RS ports associated with the multi-layer uplink transmission, and L is the number of the layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port.

17. The apparatus of claim 15, wherein to determine the first transmit power boost, the one or more processors are further configured to cause the apparatus to: The first transmit power boost for the first PT-RS port is determined based on the number of layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port among the multiple PT-RS ports, the total number of the PT-RS ports associated with the multi-layer uplink transmission, and the total number of layers of the multi-layer uplink transmission.

18. The apparatus of claim 17, wherein to determine the first transmit power boost, the one or more processors are further configured to cause the apparatus to: The first transmit power boost is determined according to the following function: α=min{10log 10 Q p *L 端口 ,10log 10 L 总数 }, Where α is the first transmit power boost, min is the minimum function, Q p is the total number of PT-RS ports associated with the multilayer uplink transmission, and L 端口 is the number of layers of the multi-layer uplink transmission transmitted by the PUSCH port mapped to the first PT-RS port, and L 总数 is the total number of the layers sent by the multi-layer uplink.

19. The apparatus of claim 15, wherein to determine the first transmit power boost, the one or more processors are further configured to cause the apparatus to: Refer to a lookup table to determine the first transmit power boost based on: the number of the layers of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port; PT-RS power boost configuration; and A first precoder configuration for the layer of the multi-layer uplink transmission sent by the PUSCH port mapped to the first PT-RS port.

20. The apparatus of claim 19, wherein the one or more processors are further configured to cause the apparatus to: Applies an operator to the value found by the lookup table.

21. The apparatus of claim 20, wherein the operator is a maximum function that returns the greater of the value found by the lookup table or a predetermined minimum power boost.

22. The apparatus of claim 20, wherein the operator is a summation function that returns the value found by the lookup table plus a predetermined power boost value.

23. The device of claim 20, wherein the operator is a minimum function that returns the lesser of a first value or a maximum power boost based on the value found by the lookup table.

24. The apparatus of claim 15, wherein the one or more processors are further configured to cause the apparatus to: determining a second transmit power boost for a second PT-RS port of the plurality of PT-RS ports, the second transmit power boost being different from the first transmit power boost; and The second transmit power boost is used to transmit a second PT-RS corresponding to the second PT-RS port, and the second PT-RS is frequency division multiplexed with the first PT-RS.

25. The apparatus of claim 15, wherein the one or more processors are further configured to cause the apparatus to: A capability information message is sent indicating the capability to utilize the PT-RS power boosting configuration.

26. The apparatus of claim 25, wherein the capability information message comprises individual capabilities of using the PT-RS power boosting configuration for individual layers of the multi-layer uplink transmission.

27. The apparatus of claim 15, wherein the one or more processors are further configured to cause the apparatus to: A configuration message indicating a PT-RS power boost configuration is received.

28. The apparatus of claim 27, wherein the configuration message comprises individual configurations of the PT-RS power boosting configurations for individual layers of the multi-layer uplink transmission.

29. An apparatus configured for wireless communication, the apparatus comprising: means for mapping a multi-layer uplink transmission to a plurality of phase tracking reference signal (PT-RS) ports, the means for mapping comprising means for distributing layers of the multi-layer uplink transmission among the plurality of PT-RS ports; means for determining a first transmit power boost for a first PT-RS port of the plurality of PT-RS ports based on a number of layers of the multi-layer uplink transmission transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port of the plurality of PT-RS ports and a total number of PT-RS ports associated with the multi-layer uplink transmission; and Means for transmitting a first PT-RS corresponding to the first PT-RS port using the first transmit power boost.

30. A non-transitory computer-readable storage medium storing instructions that, when executed, cause one or more processors to: Mapping a multi-layer uplink transmission to a plurality of phase tracking reference signal (PT-RS) ports, comprising distributing layers of the multi-layer uplink transmission among the plurality of PT-RS ports; determining a first transmit power boost for a first PT-RS port among the plurality of PT-RS ports based on a number of layers of the multi-layer uplink transmission transmitted by a physical uplink shared channel (PUSCH) port mapped to the first PT-RS port and a total number of PT-RS ports associated with the multi-layer uplink transmission; and A first PT-RS corresponding to the first PT-RS port is transmitted using the first transmit power boost.

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