Type II coherent joint transmit channel state information reporting with frequency domain compensation on finer level than sub-band size

Abstract

The present disclosure provides systems, methods, and devices for wireless communication that support coherent joint transmission (CJT) channel state information (CSI) reporting with frequency domain (FD) compensation on a finer level than the sub-band size. In a first aspect, a method of wireless communication includes a user equipment (UE) determining a plurality of CSI parameters for a set of NTRP transmit receive points (TRPs). The UE may identify a reference TRP, calculate an FD compensation for each FD compensation unit, the FD compensation for each FD compensation unit being used to compensate to a pre-decoder of each non-reference TRP and corresponding to a delay difference between the each non-reference TRP and the reference TRP. The UE then transmits a CSI report of the pre-decoder comprising FD compensation for each FD compensation unit, wherein the CSI report comprises the pre-decoder applicable to TRP of less than the total number of reports of NTRP-1. Other aspects and features are also claimed and described.

Description

Technical Field

[0001] Aspects of the present disclosure relate generally to wireless communication systems, and more particularly to coherent joint transmission (CJT) 5G next generation radio (NR) communications. Some features enable and provide improved communications, including type II CJT channel state information (CSI) reporting with frequency domain compensation at a level finer than the subband size. Background Art

[0002] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, etc. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks may be multiple-access networks capable of supporting communication for multiple users by sharing the available network resources.

[0003] A wireless communication network may include several components. These components may include wireless communication devices, such as network entities, base stations (e.g., base stations or node Bs) that may support communication for multiple user equipments (UEs). UEs may communicate with network entities via downlinks and uplinks. A downlink (or forward link) refers to a communication link from a network entity to a UE, and an uplink (or reverse link) refers to a communication link from a UE to a network entity.

[0004] A network entity may send data and control information to a UE on a downlink, or receive data and control information from a UE on an uplink. On the downlink, transmissions from a network entity may encounter interference caused by transmissions from neighboring network entities or other wireless radio frequency (RF) transmitters. On the uplink, transmissions from a UE may encounter interference from uplink transmissions from other UEs communicating with neighboring network entities or from other wireless RF transmitters. Such interference may degrade performance on both the downlink and uplink.

[0005] As the demand for mobile broadband access continues to grow, the potential for interference and congested networks grows as more UEs access long-range wireless communication networks and more short-range wireless systems are deployed in communities. Research and development continues to advance wireless technologies to not only meet the growing demand for mobile broadband access, but also to improve and enhance the user experience with mobile communications. Summary of the invention

[0006] The following summarizes some aspects of the present disclosure to provide a basic understanding of the technology discussed. This summary is not an exhaustive overview of all the 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 to delineate the scope of any or all aspects of the present disclosure. The sole purpose of this summary is to present some concepts of one or more aspects of the present disclosure in a summarized form as a prelude to more specific embodiments presented later.

[0007] In one aspect of the present disclosure, a method for wireless communication by a user equipment (UE) configured with coherent joint transmission (CJT) multiple transmit receive point (mTRP) channel state information (CSI) reporting includes: TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of a CSI reference signal (CSI-RS) received by a set of transmit receive points (TRPs), where N TRP Corresponding to N TRP The number of TRPs in this set of TRPs; N TRP The reference TRP in the set of TRPs; calculating the frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameters applicable to N TRP a predecoder for each non-reference TRP in the set of N TRPs and corresponding to the delay difference between each non-reference TRP and the reference TRP; and sending a CSI report including the CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP There are fewer than N TRPs in this set TRP -1 TRP.

[0008] In an additional aspect of the present disclosure, a device configured for wireless communication is disclosed. The device includes at least one processor and a memory coupled to the at least one processor. The at least one processor is configured to: TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of the CSI-RS received by the set of TRPs, where N TRP Corresponding to N TRP The number of TRPs in this set of TRPs; N TRP The reference TRP in the set of TRPs; calculating the frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameters applicable to N TRPa predecoder for each non-reference TRP in the set of N TRPs and corresponding to the delay difference between each non-reference TRP and the reference TRP; and sending a CSI report including the CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP There are fewer than N TRPs in this set TRP -1 TRP.

[0009] In an additional aspect of the present disclosure, a device configured for wireless communication is disclosed. The device includes: TRP A component for determining a plurality of CSI parameters by measuring one or more channel conditions of a CSI-RS received by a set of TRPs, wherein N TRP Corresponding to N TRP The number of TRPs in this set of TRPs; used to identify N TRP A component for calculating a frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameters applicable to N TRP a predecoder for each non-reference TRP in the set of TRPs and corresponding to a delay difference between each non-reference TRP and the reference TRP; and means for sending a CSI report including the CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP There are fewer than N TRPs in this set TRP -1 TRP.

[0010] In an additional aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that, when executed by a processor, cause the processor to perform operations including: TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of the CSI-RS received by the set of TRPs, where N TRP Corresponding to N TRP The number of TRPs in this set of TRPs; N TRP The reference TRP in the set of TRPs; calculating the frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameters applicable to N TRPa predecoder for each non-reference TRP in the set of N TRPs and corresponding to the delay difference between each non-reference TRP and the reference TRP; and sending a CSI report including the CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP There are fewer than N TRPs in this set TRP -1 TRP.

[0011] Other aspects, features, and implementations will become apparent to those of ordinary skill in the art when reviewing the following description of specific exemplary aspects in conjunction with the accompanying drawings. Although various features may be discussed below with respect to certain aspects and drawings, various aspects may include one or more of the advantageous features discussed herein. In other words, although one or more aspects may be discussed as having certain advantageous features, one or more of such features may also be used according to various aspects. In a similar manner, although exemplary aspects may be discussed below as aspects of devices, systems, or methods, exemplary aspects may be implemented in various devices, systems, and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] A further understanding of the nature and advantages of the present disclosure may be achieved by reference to the following drawings. In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by adding a dash and a second label to distinguish between similar components after the reference label. If only the first reference label is used in the specification, the description applies to any one of the similar components having the same first reference label, regardless of the second reference label.

[0013] Figure 1 is a block diagram illustrating example details of an example wireless communication system that will support Type II coherent joint transmission (CJT) channel state information (CSI) reporting with frequency domain compensation at a level finer than the subband size in accordance with one or more aspects.

[0014] Figure 2 is a block diagram illustrating an example of a base station and a user equipment (UE) according to one or more aspects.

[0015] Figure 3 is a block diagram illustrating a wireless network that will support Type II CJT CSI reporting with frequency domain compensation at a level finer than subband size in accordance with one or more aspects.

[0016] Figure 4is a flow chart illustrating an example process for supporting Type II CJT CSI reporting with frequency domain compensation at a level finer than subband size in accordance with one or more aspects.

[0017] Figure 5A and Figure 5B is a block diagram illustrating a wireless network configured with network entities and a UE configured to support Type II CJT CSI reporting with frequency domain compensation at a level finer than subband size according to one or more aspects.

[0018] Figure 6 is a block diagram illustrating a wireless network configured with network entities and a UE configured to support Type II CJT CSI reporting with frequency domain compensation at a level finer than subband size according to one or more aspects.

[0019] Figure 7 is a block diagram illustrating a wireless network configured with network entities and a UE configured to support Type II CJT CSI reporting with frequency domain compensation at a level finer than subband size according to one or more aspects.

[0020] Figure 8 is a block diagram illustrating a wireless network configured with network entities and a UE configured to support Type II CJT CSI reporting with frequency domain compensation at a level finer than subband size according to one or more aspects.

[0021] Fig. 9 is a block diagram illustrating a wireless network configured with network entities and a UE configured to support Type II CJT CSI reporting with frequency domain compensation at a level finer than subband size according to one or more aspects.

[0022] Fig.10 is a block diagram of an example UE supporting Type II CJT CSI reporting with frequency domain compensation at a level finer than subband size in accordance with one or more aspects.

[0023] The same reference numbers and designations in different drawings represent the same elements. DETAILED DESCRIPTION

[0024] The specific embodiments described below in conjunction with the accompanying drawings are intended as descriptions of various configurations and are not intended to limit the scope of the present disclosure. Instead, the specific embodiments include specific details for providing a thorough understanding of the subject matter of the present invention. It will be apparent to those skilled in the art that these specific details are not required in every case, and in some instances, well-known structures and components are shown in block diagram form for clarity of presentation.

[0025] The present disclosure provides systems, apparatus, methods, and computer-readable media that support Type II CJT CSI reporting with frequency domain compensation at a level finer than the subband size. Specific implementations of the subject matter described in the present disclosure may be implemented to achieve one or more of the following potential advantages or benefits. In some aspects, the present disclosure provides techniques for Type II CJT CSI reporting with frequency domain compensation at a level finer than the subband size. Various aspects of the present disclosure may extend the Type II codebook to include CJT for multiple TRPs, where frequency domain (FD) compensation may be for feedback. The disclosed aspects allow for efficient quantization of FD compensation and define how to assemble CSI reports in order to increase the reliability of higher priority FD compensation information being sent.

[0026] The present disclosure as a whole relates to providing or participating in authorized shared access between two or more wireless devices in one or more wireless communication systems (also referred to as wireless communication networks). In various specific implementations, the techniques and devices can be used in wireless communication networks, such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, fifth generation (5G) or new radio (NR) networks (sometimes referred to as "5G NR" networks, systems or devices) and other communication networks. As described herein, the terms "network" and "system" can be used interchangeably.

[0027] A CDMA network may implement, for example, a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband-CDMA (W-CDMA) and Low Chip Rate (LCR). CDMA2000 covers IS-2000, IS-95, and IS-856 standards.

[0028] For example, a TDMA network may implement a radio technology such as the Global System for Mobile Communications (GSM). The 3rd Generation Partnership Project (3GPP) defines the standard for the GSM EDGE (Enhanced Data Rate for GSM Evolution) Radio Access Network (RAN), also known as GERAN. GERAN is the radio component of the network of GSM / EDGE together with connecting base stations (e.g., Ater and Abis interfaces) and base station controllers (A interfaces, etc.). The radio access network represents a component of the GSM network through which telephone calls and packet data are routed from the public switched telephone network (PSTN) and the Internet to subscriber phones (also known as user terminals or user equipment (UE)) and from subscriber phones to the PSTN and the Internet. The network of a mobile phone operator may include one or more GERANs, which may be coupled to the UTRAN in the case of a UMTS / GSM network. Additionally, the operator network may also include one or more LTE networks, or one or more other networks. Various network types may use different radio access technologies (RATs) and RANs.

[0029] OFDMA network can realize radio technology such as Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM, etc. UTRA, E-UTRA and GSM are part of Universal Mobile Telecommunication System (UMTS). Specifically, Long Term Evolution (LTE) is a UMTS version using E-UTRA. UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided by an organization named "3rd Generation Partnership Project" (3GPP), and cdma2000 is described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). These radio technologies and standards are known or under development. For example, 3GPP is a collaboration between telecommunication association groups with the goal of defining a globally applicable third generation (3G) mobile phone specification. 3GPP LTE is a 3GPP plan with the goal of improving the UMTS mobile phone standard. 3GPP can define the specifications of next generation mobile networks, mobile systems and mobile devices. The present disclosure may describe certain aspects with reference to LTE, 4G or 5G NR technology; however, the description is not intended to be limited to a particular technology or application, and one or more aspects described with reference to one technology may be understood to be applicable to another technology. Additionally, one or more aspects of the present disclosure may relate to shared access to wireless spectrum between networks using different radio access technologies or radio air interfaces.

[0030] 5G networks are expected to have diverse deployments, diverse spectrum, and diverse services and devices that can be implemented using a unified air interface based on OFDM. To achieve these goals, in addition to developing new radio technologies for 5GNR networks, further enhancements to LTE and LTE-A are also being considered. 5GNR will be able to scale to provide coverage (1) to massive Internet of Things (IoT), with ultra-high density (e.g., about 1M nodes / km 2 ), ultra-low complexity (e.g., about 10s of bits / second), ultra-low power consumption (e.g., about 10+ years battery life), and deep coverage with the ability to reach challenging locations; (2) including mission-critical control with strong security to protect sensitive personal, financial, or classified information, ultra-high reliability (e.g., about 99.9999% reliability), ultra-low latency (e.g., about 1 millisecond (ms)), and users with a wide range of mobility or lack of mobility; and (3) providing services with enhanced mobile broadband (including extremely high capacity (e.g., about 10Tbps / km 2 ), extremely high data rates (e.g., multi-Gbps rates, 100+Mbps user experience rates), and deep awareness coverage with advanced discovery and optimization.

[0031] Devices, networks, and systems may be configured to communicate via one or more portions of the electromagnetic spectrum. The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5GNR, two initial operating bands have been identified as frequency ranges designated FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as the "below 6 GHz" band in various documents and articles. Similar naming issues sometimes arise with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" (mmW) band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "mmW" band by the International Telecommunication Union (ITU).

[0032] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.126GHz-24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, so the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, currently exploring higher frequency bands to extend 5G NR operations to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR2x (52.6GHz-71GHz), FR4 (71GHz-114.25GHz) and FR5 (114.25GHz-275GHz). Each of these higher frequency bands falls within the EHF band.

[0033] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used herein, the term "below 6 GHz" or the like can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if the term "mmW" or the like is used herein, it can broadly represent frequencies that can include mid-band frequencies, can be within FR2, FR2x, FR4 and / or FR5, or can be within the EHF band.

[0034] 5G NR devices, networks, and systems may be implemented using optimized OFDM-based waveform features. These features may include scalable parameter sets and transmission time intervals (TTIs); a common flexible framework that efficiently multiplexes services and features using dynamic, low-latency time division duplex (TDD) designs or frequency division duplex (FDD) designs; and advanced wireless technologies such as massive multiple-input multiple-output (MIMO), robust mmW transmission, advanced channel decoding, and device-centric mobility. The scalability of parameter sets in 5GNR and the scaling of subcarrier spacing can efficiently address various services operating across different spectrums and different deployments. For example, in various outdoor and macro coverage deployments of less than 3GHz FDD or TDD implementations, the subcarrier spacing may appear at 15kHz, such as over bandwidths of 1MHz, 5MHz, 10MHz, 20MHz, etc. For various other outdoor and small cell coverage deployments where TDD is greater than 3GHz, the subcarrier spacing may appear at 30kHz over 80MHz / 100MHz bandwidth. For various other indoor broadband implementations, using TDD on the unlicensed portion of the 5GHz band, the subcarrier spacing may occur at 60kHz over a 160MHz bandwidth. Finally, for various deployments transmitting over mmW components at 28GHz TDD, the subcarrier spacing may occur at 120kHz over a 500MHz bandwidth.

[0035] 5G NR's scalable parameter sets facilitate scalable TTIs for diverse latency and quality of service (QoS) requirements. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmission to start on symbol boundaries. 5G NR also anticipates a self-contained integrated subframe design where uplink or downlink scheduling information, data, and acknowledgments are in the same subframe. The self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, and adaptive uplink or downlink can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current business needs.

[0036] For clarity, certain aspects of the devices and techniques may be described below with reference to example 5G NR implementations or in a 5G-centric manner, and 5G terminology may be used as illustrative examples in portions of the description below; however, the description is not intended to be limited to 5G applications.

[0037] Furthermore, it should be understood that in operation, a wireless communication network adapted according to the concepts herein may operate using any combination of licensed or unlicensed spectrum depending on load and availability. It will therefore be apparent to one of ordinary skill in the art that the systems, devices, and methods described herein may be applied to other communication systems and applications beyond the specific examples provided.

[0038] Although various aspects and implementations are described in this application by way of illustration of some examples, it will be appreciated by those skilled in the art that additional implementations and use cases may be generated in many different arrangements and scenarios. The innovations described herein may be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, implementations or uses may be implemented via integrated chip implementations or other non-module component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail devices or purchasing devices, medical devices, AI-enabled devices, etc.). Although some examples may or may not specifically point to use cases or applications, the applicability of a wide variety of described innovations may occur. Implementations may range from chip-level (e.g., or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more of the described aspects. In some practical environments, a device incorporating the various aspects and features described may also necessarily include additional components and features for implementing and practicing the claimed and described aspects. It is intended that the innovations described herein may be implemented in a wide variety of implementations of different sizes, shapes, and configurations, including both large and small devices, chip-level components, multi-component systems (e.g., radio frequency (RF) chains, communication interfaces, processors), distributed arrangements, end-user devices, and the like.

[0039] Figure 1 An example of a wireless communication system 100 that supports scheduling requests for spatial multiplexing according to one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, a new radio (NR) network, or a network operating according to other systems and radio technologies (including future systems and radio technologies not explicitly mentioned herein).

[0040] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may include devices in different forms or with different capabilities. In 3GPP, the term "cell" may refer to a specific geographic coverage area of ​​a network entity (such as the network entity 105) or a network entity subsystem serving the coverage area, depending on the context in which the term is used. In various examples, the network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, etc. In some examples, the network entity 105 and the UE 115 may communicate wirelessly via one or more communication links 125 (e.g., a radio frequency (RF) access link). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UE 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which the network entity 105 and the UE 115 may support signal communications according to one or more radio access technologies (RATs).

[0041] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be devices in different form factors or with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1 . The UEs 115 described herein may be capable of communicating with various types of devices (such as other UEs 115 or network entities 105), such as Figure 1 shown.

[0042] As described herein, a node of the wireless communication system 100 (which may be referred to as a network node or a wireless node) may be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node may be a UE 115. As another example, the node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as a network node. For example, disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from the second node.

[0043] In some examples, the network entities 105 may communicate with the core network 130, or with each other, or both. For example, the network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, the network entities 105 may communicate with each other directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130) via the backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, the network entities 105 may communicate with each other via midhaul communication links 162 (e.g., according to a midhaul interface protocol) or fronthaul communication links 168 (e.g., according to a fronthaul interface protocol), or any combination thereof. The backhaul communication link 120, the midhaul communication link 162, or the fronthaul communication link 168 may be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), etc. or various combinations thereof. The UE 115 may communicate with the core network 130 via the communication link 155.

[0044] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a transceiver base station, a radio base station, an NR base station, an access point, a radio transceiver, a transmit receive point (TRP), a node B, an evolved node B (eNB), a next generation node B, or a gigabit node B (any of which may be referred to as a gNB), a 5G NB, a next generation eNB (ng-eNB), a home node B, a home evolved node B, or other suitable terms). In some examples, the network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, stand-alone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140).

[0045] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that may be configured to utilize a protocol stack that is physically or logically distributed between two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, the network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., a near real-time RIC (near RT RIC), a non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) 180 system, or any combination thereof. The RU 170 may also be referred to as a radio head, an intelligent radio head, a remote radio head (RRH), a remote radio unit (RRU), or a transmit receive point (TRP). One or more components of the network entity 105 in the decomposed RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0046] The functional split between CU 160, DU 165, and RU 175 is flexible, and different functionalities may be supported depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof) are performed at CU 160, DU 165, or RU 175. For example, a functional split of a protocol stack may be employed between CU 160 and DU 165, such that CU 160 may support one or more layers of a protocol stack, and DU 165 may support one or more different layers of a protocol stack. In some examples, CU 160 may host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functionality and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as Layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160.

[0047] Additionally or alternatively, a functional split of the protocol stack may be employed between DU 165 and RU 170, such that DU 165 may support one or more layers of the protocol stack and RU 170 may support one or more different layers of the protocol stack. DU 165 may support one or more different cells (e.g., via one or more RU 170). In some cases, the functional split between CU 160 and DU 165 or between DU 165 and RU 170 may be within the protocol layer (e.g., some functions of the protocol layer may be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer may be performed by a different one of CU 160, DU 165, or RU 170). CU 160 may be further functionally split into CU control plane (CU-CP) functions and CU user plane (CU-UP) functions. CU 160 may be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 may be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., open fronthaul (FH) interfaces). In some examples, midhaul communication links 162 or fronthaul communication links 168 may be implemented according to interfaces (e.g., channels) between layers of a protocol stack supported by the corresponding network entities 105 communicating over these communication links.

[0048] In a wireless communication system (e.g., wireless communication system 100), infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to a core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DUs 165 or one or more RUs 170 may be controlled in part by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a coupled IAB donor's DU 165. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas of the IAB node 104 (e.g., of the RU 170) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0049] For example, an access network (AN) or RAN may include an access node (e.g., an IAB donor), communications between an IAB node 104, and one or more UEs 115. The IAB donor may facilitate connectivity between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130). That is, the IAB donor may refer to a RAN node having a wired or wireless connection to the core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170), wherein the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link). The IAB donor and the IAB node 104 may communicate via an F1 interface according to a protocol defining signaling messages (e.g., an F1 AP protocol). Additionally or alternatively, CU 160 may communicate with the core network via an interface (which may be an example of part of a backhaul link) and may communicate with other CUs 160 (e.g., CU 160 associated with an alternative IAB donor) via an Xn-C interface (which may be an example of part of a backhaul link).

[0050] An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access for UE 115, wireless self-backhaul capabilities, etc.). DU 165 may act as a distributed scheduling node toward child nodes associated with IAB node 104, and IAB-MT may act as a scheduled node toward a parent node associated with IAB node 104. That is, an IAB donor may be referred to as a parent node that communicates with one or more child nodes (e.g., an IAB donor may relay a UE's transmission through one or more other IAB nodes 104). Additionally or alternatively, an IAB node 104 may also be referred to as a parent node or child node of other IAB nodes 104, depending on the relay chain or configuration of the AN. Thus, the IAB-MT entity of the IAB node 104 may provide a Uu interface for the child IAB node 104 to receive signaling from the parent IAB node 104, and a DU interface (eg, DU 165) may provide a Uu interface for the parent IAB node 104 to signal the child IAB node 104 or the UE 115.

[0051] For example, the IAB node 104 may be referred to as a parent node supporting child IAB node communications and as a child node associated with the IAB donor. The IAB donor may include a CU 160 having a wired or wireless connection (e.g., backhaul communication link 120) to the core network 130, and may act as a parent node of the IAB node 104. For example, the DU 165 of the IAB donor may relay transmission to the UE 115 through the IAB node 104, and may directly signal the UE 115 of the transmission. The CU 160 of the IAB donor may signal the IAB node 104 of the communication link establishment via the F1 interface, and the IAB node 104 may schedule the transmission (e.g., the transmission relayed from the IAB donor to the UE 115) through the DU 165. That is, data may be relayed to and from the IAB node 104 via signaling on the NR Uu-interface of the MT to the IAB node 104. Communications with the IAB node 104 may be scheduled by the DU 165 of the IAB donor, and communications with the IAB node 104 may be scheduled by the DU 165 of the IAB node 104 .

[0052] Where the techniques described herein are applied to the context of a decomposed RAN architecture, one or more components of the decomposed RAN architecture may be configured to support scheduling requests for spatial multiplexing as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally or alternatively be performed by one or more components of the decomposed RAN architecture (e.g., an IAB node 104, a DU 165, a CU 160, a RU 170, a RIC 175, a SMO 180).

[0053] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects (such as appliances, or vehicles, meters, satellite radios, global positioning system (GPS) devices, global navigation satellite system (GNSS) devices, logistics controllers, unmanned aerial vehicles (UAVs), drones, smart energy or security devices, solar panels or solar arrays, etc.).

[0054] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 shown.

[0055] The UE 115 and the network entity 105 may communicate wirelessly with each other via one or more communication links 125 (e.g., access links) via one or more carriers. The term "carrier" may refer to a collection of RF spectrum resources having a physical layer structure defined for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of an RF spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communications with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between these devices and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of the network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of the RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0056] The signal waveform transmitted through the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system using MCM technology, a resource element may refer to a resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and the subcarrier spacing may be inversely related. The amount of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both), so that the more resource elements a device receives and the higher the order of the modulation scheme, the higher the data rate of the device can be. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers, beams), and the use of multiple spatial resources may improve the data rate or data integrity of communications with UE 115.

[0057] One or more parameter sets for a carrier may be supported, where the parameter set may include subcarrier spacing (Δf) and cyclic prefix. A carrier may be divided into one or more BWPs with the same or different parameter sets. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications for a UE 115 may be constrained to one or more active BWPs.

[0058] The time interval for the network entity 105 or the UE 115 may be expressed in multiples of a basic time unit, which may be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the maximum supported subcarrier spacing, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources may be organized according to radio frames, each radio frame having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0059] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a certain number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended in front of each symbol period). In some wireless communication systems 100, the time slot may be further divided into a plurality of micro-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling period. The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0060] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmit time interval (TTI). In some examples, the TTI duration (e.g., the amount of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0061] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier using, for example, one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) of a physical control channel may be defined by a set of symbol periods and may extend across a system bandwidth of a carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more UEs in UE 115 may monitor or search a control region to obtain control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate may refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific one of the UEs 115 .

[0062] In some examples, the network entities 105 (e.g., base stations 140, RUs 170) may be mobile and thus provide communication coverage for a mobile one of the coverage areas 110. In some examples, a different one of the coverage areas 110 associated with different technologies may overlap, but may be supported by the same one of the network entities 105. In some other examples, overlapping coverage areas 110 associated with different technologies may be supported by different ones of the network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 provide coverage for respective coverage areas 110 using the same or different radio access technologies.

[0063] Some of the UEs 115 (such as MTC or IoT devices) may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a network entity 105 (e.g., base station 140) without human intervention. In some examples, M2M communication or MTC may include communication from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents the information to a person interacting with the application. Some of the UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Application examples of MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.

[0064] Some of the UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but does not support concurrent transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power saving techniques for the UE 115 include entering a power saving deep sleep mode when not engaged in active communications, or operating over a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some of the UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a subcarrier or resource block (RB) set) within a carrier, within a guard band of a carrier, or outside a carrier.

[0065] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). UE 115 may be designed to support ultra-reliable, low-latency or critical functions. Ultra-reliable communication may include private communication or group communication, and may be supported by one or more services (such as push-to-talk, video or data). Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency and ultra-reliable low-latency can be used interchangeably herein.

[0066] In some examples, a UE 115 may be able to communicate directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P) or D2D or sidelink protocol). In some examples, one or more UEs 115 in a group that are performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support aspects of such D2D communication as configured or scheduled by the network entity 105. In some examples, one or more UEs 115 in such a group may be outside of the coverage area 110 of the network entity 105, or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system in which each UE 115 transmits to each of the other UEs in the group of UEs 115. In some examples, network entity 105 may facilitate scheduling of resources for D2D communications. In some other examples, D2D communications may be performed between UEs 115 without involving network entity 105.

[0067] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units) using vehicle-to-network (V2N) communications, or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170), or both.

[0068] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by a network entity 105 (e.g., a base station 140) associated with the core network 130. User IP packets may be delivered through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the IP service 150 of one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0069] The wireless communication system 100 may operate using one or more frequency bands that may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally speaking, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelength ranges from about one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features (which may be referred to as clusters), but these waves may be sufficient to penetrate structures so that macro cells provide services to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using smaller frequencies and longer wavelengths of the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0070] The wireless communication system 100 may also operate in a super high frequency (SHF) region (also known as a centimeter band) using a frequency band of 3 GHz to 30 GHz or in an extremely high frequency (EHF) region (also known as a millimeter band) of a spectrum (e.g., from 30 GHz to 300 GHz). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between a UE 115 and a network entity 105 (e.g., a base station 140, RU170), and the EHF antenna of the corresponding device may be smaller and closer than the UHF antenna. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be affected by greater atmospheric attenuation and a shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0071] The wireless communication system 100 may utilize both licensed RF spectrum bands and unlicensed RF spectrum bands. For example, the wireless communication system 100 may employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed RF spectrum band, devices such as the network entity 105 and the UE 115 may employ carrier sensing for conflict detection and avoidance. In some examples, operations in an unlicensed band may be based on a carrier aggregation configuration combined with component carriers operating in a licensed band (e.g., LAA). Operations in an unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, and the like.

[0072] The network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the network entity 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with the network entity 105 may be located in different geographic locations. The network entity 105 may have an antenna array having a collection of multiple rows and columns of antenna ports that the network entity 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals transmitted via the antenna ports.

[0073] The network entity 105 or UE 115 may use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technology may be referred to as spatial multiplexing. The multiple signals may be sent, for example, by a transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO), in which multiple spatial layers are sent to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to multiple devices.

[0074] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals conveyed via antenna elements of an antenna array so that some signals propagating in a particular direction relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals conveyed via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of these antenna elements may be defined by a set of beamforming weights associated with a particular direction (e.g., relative to the antenna array of the transmitting device or the receiving device or relative to some other direction).

[0075] The network entity 105 or UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the network entity 105 (e.g., base station 140, RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network entity 105 along different directions. For example, the network entity 105 may send signals according to different sets of beamforming weights associated with different transmission directions. Transmission along different beam directions may be used to identify the beam direction (e.g., by a transmitting device (such as network entity 105) or by a receiving device (such as UE 115)) for later transmission or reception by the network entity 105.

[0076] Some signals, such as data signals associated with a particular receiving device, may be sent by a sending device (e.g., a sending network entity 105, a sending UE 115) along a single beam direction (e.g., a direction associated with a receiving device (such as a receiving network entity 105 or a receiving UE 115)). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on signals sent along one or more beam directions. For example, UE 115 may receive one or more of the signals sent by network entity 105 along different directions and may report to network entity 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0077] In some examples, transmission by a device (e.g., by network entity 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more subbands. Network entity 105 may send a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or unprecoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent along one or more directions by a network entity 105 (e.g., base station 140, RU 170), UE 115 may use similar techniques to send signals multiple times along different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals along a single direction (e.g., to send data to a receiving device).

[0078] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a receiving device (e.g., network entity 105), the receiving device (e.g., UE 115) may perform receiving operations (e.g., directional listening) according to multiple receiving configurations. For example, the receiving device may perform reception according to multiple receiving directions by: receiving via different antenna subarrays, processing the received signals according to different antenna subarrays, receiving according to different receiving beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing the received signals according to different receiving beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0079] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or PDCP layer may be IP-based. The RLC layer may perform packet segmentation and reassembly to communicate through logical channels. The MAC layer may perform priority processing and multiplexing of logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the RRC protocol layer may provide the establishment, configuration, and maintenance of an RRC connection that supports a radio bearer for user plane data between a UE 115 and a network entity 105 or a core network 130. At the PHY layer, transport channels may be mapped to physical channels.

[0080] UE 115 and network entity 105 may support retransmission of data to increase the possibility of successfully receiving data. Hybrid automatic repeat request (HARQ) feedback is a technology for increasing the possibility of correctly receiving data through a communication link (e.g., communication link 125, D2D communication link 135). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support simultaneous slot HARQ feedback, wherein the device may provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In some other examples, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0081] Figure 2 1 is a block diagram illustrating an example of a base station 140 and a UE 115 according to one or more aspects. The base station 140 and the UE 115 may be Figure 1 Any of the network entities and base stations in the network entity 105 and a UE in the UE. For the limited association scenario (as mentioned above), the network entity 105 may be a small cell base station, and the UE 115 may be a UE 115 operating in the service area of ​​the small cell base station. In order to access the small cell base station, the UE will be included in the accessible UE list of the small cell base station. The base station 140 may also be some other type of base station. Figure 2 As shown, a network entity 105, such as a base station 140, may be equipped with antennas 234a through 234t, and a UE 115 may be equipped with antennas 252a through 252r for facilitating wireless communications.

[0082] At the base station 140, the transmit processor 220 may receive data from the data source 212 and control information from the controller 240 (such as a processor). The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ (automatic repeat request) indicator channel (PHICH), a physical downlink control channel (PDCCH), an enhanced physical downlink control channel (EPDCCH), an MTC physical downlink control channel (MPDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. Additionally, the transmit processor 220 may process (e.g., encode and symbol map) the data and the control information, respectively, to obtain data symbols and control symbols. The transmit processor 220 may also generate reference symbols, such as for a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and a cell-specific reference signal. The transmit (TX) MIMO processor 230 may perform spatial processing (e.g., pre-coding) on ​​data symbols, control symbols, or reference symbols, if applicable, and may provide output symbol streams to modulators (MODs) 232a to 232t. For example, the spatial processing performed on the data symbols, control symbols, or reference symbols may include pre-coding. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Additionally or alternatively, each modulator 232 may process the output sample stream (e.g., analog-convert, amplify, filter, and up-convert it) to obtain a downlink signal. The downlink signals from modulators 232a to 232t may be transmitted via antennas 234a to 234t, respectively.

[0083] At the UE 115, antennas 252a to 252r may receive downlink signals from the base station 140 and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the demodulators 254a to 254r, perform MIMO detection on the received symbols when necessary, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 115 to a data sink 260, and provide decoded control information to a controller 280 (e.g., a processor).

[0084] On the uplink, at the UE 115, the transmit processor 264 may receive and process data from the data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from the controller 280 (e.g., for a physical uplink control channel (PUCCH)). Additionally, the transmit processor 264 may also generate reference symbols for reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266 (if applicable), further processed by the modulators 254a to 254r (e.g., for SC-FDM, etc.), and transmitted to the network entity 105. At the network entity 105, the uplink signal from the UE 115 may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 115. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller 240 .

[0085] Controllers 240 and 280 may direct the operation at base station 140 and UE 115, respectively. Controller 240 or other processors and modules at base station 140 or controller 280 or other processors and modules at UE 115 may perform or direct the execution of various processes for the techniques described herein in order to perform or direct the execution of various processes for the techniques described herein. Figure 4 The illustrated execution or other processes for the techniques described herein. Memories 242 and 282 may store data and program codes for base station 140 and UE 115, respectively. Scheduler 244 may schedule UEs for data transmission on the downlink or uplink.

[0086] In some cases, the UE 115 and the base station 140 may operate in a shared radio spectrum band, which may include licensed or unlicensed (e.g., contention-based) spectrum. In the unlicensed frequency portion of the shared radio spectrum band, the UE 115 or the base station 140 may traditionally perform a medium sensing procedure to compete for access to the spectrum. For example, the UE 115 or the base station 140 may perform a listen-before-talk or listen-before-transmit (LBT) process (such as a clear channel assessment (CCA)) before communicating to determine whether the shared channel is available. In some specific implementations, the CCA may include an energy detection process to determine whether there are any other active transmissions. For example, the device may infer that a change in the received signal strength indicator (RSSI) of the power meter indicates that the channel is occupied. Specifically, the signal power concentrated in a certain bandwidth and exceeding a predetermined noise floor may indicate another wireless transmitter. CCA may also include detection of a specific sequence indicating the use of the channel. For example, another device may send a specific preamble before sending a data sequence. In some cases, the LBT process may include the wireless node adjusting its own backoff window based on the amount of energy detected on the channel or acknowledgement / negative acknowledgement (ACK / NACK) feedback for its own transmitted packets (as a manifestation of a collision).

[0087] Generally speaking, four categories of LBT procedures have been proposed for sensing signals on a shared channel that may indicate that the channel is occupied. In the first category (CAT 1 LBT), no LBT or CCA is applied to detect occupancy of a shared channel. The second category (CAT 2 LBT) (which may also be referred to as shortened LBT, single LBT, 16-μs LBT, or 25-μs LBT) specifies that a node performs CCA to detect energy above a predetermined threshold or to detect a message or preamble occupying a shared channel. CAT 2 LBT performs CCA without using a random backoff operation, which results in its shortened length relative to the next category.

[0088] The third category (CAT 3LBT) performs CCA to detect energy or messages on a shared channel, but also uses random backoff and a fixed contention window. Therefore, when a node initiates CAT 3LBT, it performs a first CCA to detect occupancy of the shared channel. If the shared channel is idle for the duration of the first CCA, the node can continue to send. However, if the first CCA detects a signal occupying the shared channel, the node selects a random backoff based on a fixed contention window size and performs an extended CCA. If the shared channel is detected to be idle during the extended CCA and the random number has been decremented to 0, the node can start sending on the shared channel. Otherwise, the node decrements the random number and performs another extended CCA. The node will continue to perform extended CCAs until the random number reaches 0. If the random number reaches 0 and no one of the extended CCAs detects channel occupancy, the node can then send on the shared channel. If in any of the extended CCAs, the node detects channel occupancy, the node can reselect a new random backoff based on a fixed contention window size to start the countdown again.

[0089] The fourth category (CAT 4 LBT) (which may also be referred to as the full LBT procedure) performs CCA with energy or message detection using random backoff and variable contention window size. The sequence of CCA detection proceeds similarly to the process of CAT 3 LBT, except that the contention window size is variable for the CAT 4 LBT procedure.

[0090] Sensing for shared channel access may also be categorized into full or shortened LBT procedures. For example, a full LBT procedure such as a CAT 3 or CAT 4 LBT procedure (including an extended channel clearance assessment (ECCA) over a non-trivial number of 9-μs time slots) may also be referred to as "Type 1 LBT". A shortened LBT procedure such as a CAT 2 LBT procedure (which may include a one-time CCA for 16-μs or 25-μs) may also be referred to as "Type 2 LBT".

[0091] Using medium sensing procedures to compete for access to unlicensed shared spectrum can result in communication inefficiencies. This is particularly evident when multiple network operating entities (e.g., network operators) attempt to access shared resources. In the wireless communication system 100, the network entity 105 and the UE 115 may be operated by the same or different network operating entities. In some examples, a separate network entity 105 or UE 115 may be operated by more than one network operating entity. In other examples, each network entity 105 and UE 115 may be operated by a single network operating entity. Requiring each network entity 105 and UE 115 of different network operating entities to compete for shared resources can result in increased signaling overhead and communication latency.

[0092] In some cases, operation in an unlicensed band may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operation in the unlicensed spectrum may include downlink transmissions, uplink transmissions, peer to peer transmissions, or a combination of these. Duplexing in the unlicensed spectrum may be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of both.

[0093] In advanced wireless communications including 5G NR, joint transmission defines concurrent data transmission from multiple cooperating network entities to a UE. Joint transmission can be implemented as coherent joint transmission (CJT) or non-coherent joint transmission (NCJT). In the case of CJT, the network will have some knowledge of the detailed channels from two or more network entities (such as, for example, transmit receive points (TRPs)) to the UE involved in the joint transmission. The network may then select the transmit weights accordingly, such as to concentrate the energy at the location of the UE. Therefore, CJT may be viewed as similar to a type of pseudo-beamforming, for which the antenna panels participating in the beamforming may not be collocated, but may correspond to different TRPs. In contrast, for NCJT, the network does not exploit any detailed channel knowledge in the joint transmission.

[0094] Rel-16 Type II CSI reporting includes determining the pre-decoder according to the following general equation:

[0095]

[0096] NCJT communication can pre-decode data separately on different TRPs. NCJT Pre-Decoder (Assuming two TRPs, TRP A and TRP B ) identifies a separate pre-decoder, which can then be applied to TRP according to the following equation A and TRP B The data (X) at each A and X B ):

[0097]

[0098] The pre-decoder satisfies V A :4×1,V B :4×2, and the data satisfies (RI TRP ×1)X A :1×1,X B :2×1. With individual precoding, the UE can identify which data is sent from which TRP.

[0099] In contrast, CJT communications can jointly communicate with all TRPs (e.g., TRPA and TRP B ) data. CJT pre-decoder (Assuming two TRPs, TRP A and TRP B ) reflects the joint precoding, which can then be applied to TRP according to the following equation A and TRP B The data (X) at each A and X B ):

[0100]

[0101] The pre-decoder satisfies V A :4×2,V B :4×2, and the data satisfies (RI CJT ×1)X:2×1. With joint precoding, the UE will not know which data is sent from which TRP. Various aspects of the present disclosure may relate to frequency domain (FD) compensation reporting in CJT communication scenarios.

[0102] One area identified for potential enhancement in CJT communications is CSI acquisition. While such enhancements may benefit all specific implementations of CJT communications, there may be increased benefits for communications within FR1. Consideration of enhancements assumes UE communications with multiple TRPs (mTRPs), ideal backhaul and synchronization, and the same number of antenna ports across the TRPs. The Type II codebook for CJT defined in 3GPP Release 16 (Rel-16) and Release 17 (Rel-17) is for single TRP (sTRP) communications, so one enhancement may be to refine this Release 16 / 17 Type II codebook for mTRPs. The maximum number of CSI-RS ports per resource remains the same as in Rel-17 (32). In lower frequency bands within FR1, the size of a single TRP or antenna panel with 32 ports may be too large for practical deployment under current antenna technology. Therefore, for CJT communications using distributed TRPs or antenna panels, a larger number of antenna ports can be more easily enabled.

[0103] Figure 3 1 is a block diagram illustrating a wireless network 30 that will support Type II CJT CSI reporting with frequency domain compensation at a level finer than the subband size in accordance with one or more aspects. The illustrated portion of the wireless network 30 includes network entities 105a and 105b operating in a distributed mTRP communication operation with a UE 115. Due to the relationship between the UE 115 and each of the network entities 105a and 105b, the delay τ associated with the channel between the UE 115 and the network entity 105b is2 may be greater than the delay τ associated with the channel between UE 115 and network entity 105a 1 .

[0104] The larger delay spread in the distributed mTRP scenario may also result in more severe frequency selectivity, even within the precoder subband. One considered solution to this increased selectivity would be to implement a finer or smaller precoding matrix indicator (PMI) subband size. However, reducing the PMI subband size may increase the UE complexity of CSI measurements since the reduced subband size will result in a larger number of subbands. Therefore, another solution proposes determining the FD compensation for downlink data transmission (e.g., PDSCH) relative to a reference TRP. For example, where network entity 105a is identified as reference TRP#1, UE 115 may determine the FD compensation for network entity 105b (as TRP#2) as an FD phase rotation according to the following equation:

[0105] Δφ=2πf rotate (τ 1 -τ 2 ) (4)

[0106] The FD phase rotation of equation (4) is calculated specifically using the ratio given by the FD compensation unit f rotate The PMI subband granularity is represented by a finer granularity to target the relative delay difference (τ 1 -τ 2 ) for compensation.

[0107] Communication flow 300 illustrates a PMI subband size of four resource blocks (RBs). UE 115 may determine Δφ FD compensation based on measurements of CSI reference signals (CSI-RS) and report this FD compensation along with PMI in a CSI report. The reported subband-level precoder for PMI may be given by the following equation:

[0108]

[0109] The pre-decoder W for reference TRP#1 (network entity 105a) TRP#1 No FD compensation will be performed, and the pre-decoder W for TRP#2 (network entity 105b) TRP#2 FD compensation is performed at a reported finer frequency level or FD compensation unit (e.g., at RB level, resource element (RE) level, or up to half of a PMI subband). TRP#2 The FD compensation of each FD compensation unit K is included. Therefore, for each FD compensation unit K, Δφ(K), the FD compensated predecoder w TRP#2,FDU#k ·E -jkΔφIncluding [W TRP#2,FDU#0 ,W TRP#2,FDU#1 ·e -jΔφ ,…,W TRP#2,FDU#(K-1) ·e -j(K-1)Δφ ], where K is the total number of PMI subbands N 3 and FDU#k represents the kth FD compensation unit (FDU) 0 to K-1.

[0110] Various aspects of the present disclosure relating to Type II CJT CSI reporting with FD compensation at a level finer than the subband size provide for reporting relative delay differences τ 1 -τ 2 The solution includes quantized FD compensation Δφ=2πf rotate (τ 1 -τ 2 ), determining a reference TRP, and encapsulating FD compensation into an uplink control information (UCI) message. Additionally, aspects may define handling of a quasi-co-site (QCL) delay of a CJT-PDSCH demodulation reference signal (DMRS), where CSI-RS and tracking reference signals (TRS) are handled without FD compensation.

[0111] Figure 4 4 is a flow chart illustrating an example process 40 for supporting Type II CJT CSI reporting with frequency domain compensation at a level finer than the subband size in accordance with one or more aspects. The operations of process 40 may be performed by a UE (such as the one described above with reference to Figure 1 and Figure 2 The UE 115 or reference Fig.10 The UE) is executed. Fig.10 is a block diagram illustrating an example UE configured to support Type II CJT CSI reporting with frequency domain compensation at a level finer than the subband size in accordance with one or more aspects. For example, example operations (also referred to as “blocks”) of process 40 may enable a UE 115 to support Type II CJT CSI reporting with frequency domain compensation at a level finer than the subband size.

[0112] As shown, the memory 282 may include mTRP logic 1001, CJT CSI reporting logic 1002, measurement logic 1003, reference TRP 1004, and CSI report generator 1005. The mTRP logic 1001 includes code or instructions that, when executed under the control of the controller 280 (referred to herein as the "execution environment" of the mTRP logic 1001), implements the ability of the UE 115 to communicate with the network via multiple distributed antenna panels or TRPs. The CJT CSI reporting logic 1002, when executed under the control of the controller 280, implements the ability of the UE 115 to perform CSI reporting for CJT with mTRP. The measurement logic 1003 includes code or instructions that implement measurement functionality within the UE 115 when executed under the control of the controller 280. The reference TRP 1004 provides a designated storage location within the memory 282 for storing a reference TRP among multiple TRPs operating in the mTRP. The CSI report generator 1005 includes code or instructions that, when executed under the control of the controller 280 , implements the functionality of the UE 115 determining CSI parameters and assembling or packaging the CSI parameters into a CSI report for transmission.

[0113] At block 400, a UE such as UE 115 receives a request from N TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of the CSI-RS received by the set of TRPs, where N TRP Corresponding to N TRP The UE 115 may execute mTRP logic 1001 under the control of the controller 280. The execution environment of the mTRP logic 1001 provides the UE 115 with functionality and capabilities for handling network communications through multiple distributed antenna panels / TRPs. The UE 115 may further execute CJT CSI reporting logic 1002 under the control of the controller 280. The execution environment of the CJT CSI reporting logic 1002 enables the UE 115 to have functionality and capabilities for determining CSI parameters for communication channels between multiple distributed antenna panels / TRPs as part of CJT communications within mTRP operations.

[0114] Within the execution environment of the mTRP logic 1001 and the CJT CSI reporting logic 1002, the UE 115 executes the measurement logic 1003 under the control of the controller 280. The execution environment of the measurement logic 1003 enables the UE 115 to have the functionality and capability to measure reference signals (e.g., CSI-RS) from multiple antenna panels / TRPs within the mTRP operation. Measurements derived from such functionality and capabilities may indicate CSI parameters that may be prepared for the CSI reporting process.

[0115] At block 401, the UE identifies N TRP 1004 in the memory 282.

[0116] At block 402, the UE calculates a frequency domain compensation amount for each frequency domain compensation unit, wherein the frequency domain compensation amount for each frequency domain compensation unit compensates for the frequency domain compensation amount applicable to N in the CSI parameter. TRP The UE 115 may calculate the FD compensation amount for each FD compensation unit within the execution environment of the CJT CSI reporting logic 1002 and the measurement logic 1003. The calculated FD compensation reflects the delay difference between each non-reference TRP and the reference TRP.

[0117] At block 403, the UE sends a CSI report including CSI parameters of a precoder compensated by a frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a precoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP There are fewer than N TRPs in the set TRP -1 TRP. Once the UE 115 determines the CSI parameters including the pre-decoder compensated with the FD compensation amount for mTRPs, the UE 115 executes the CSI report generator 1005 under the control of the controller 280. The execution environment of the CSI report generator 1005 enables the UE 115 to have the functionality and ability to assemble a CSI report including the FD compensated pre-decoder and other CSI parameters derived from the measurement of the reference signal. Within the execution environment of the CJT CSI reporting logic 1002, the UE 115 will use the CSI report generator 1005 with less than N TRPs configured for mTRP operation. TRP N of the sets of TRPs TRP -1 TRP is the total number of TRPs associated with the FD compensated precoder CSI parameters to assemble the CSI report.

[0118] As reference Figure 4The present disclosure provides techniques for Type II CJT CSI reporting with frequency domain compensation at a level finer than the subband size. Various aspects of the present disclosure may extend the Type II codebook to include CJT for multiple TRPs, where frequency domain (FD) compensation may be for feedback. The disclosed aspects allow for efficient quantization of FD compensation and define how to assemble CSI reports in order to increase the reliability of higher priority FD compensation information being sent.

[0119] Figure 5A and Figure 5B is a block diagram illustrating wireless networks 50 and 51 configured with network entities 105a-105c and UE 115 configured to support Type II CJT CSI reporting with frequency domain compensation at a level finer than the subband size according to one or more aspects. TRP The relative delay difference of TRP is CJT mTRP CSI of UE, such as Figure 5A and Figure 5B , UE 115 may send a CSI report with FD compensation having a variable number M of TRPs. Various aspects of the present disclosure may include UE 115 configured with different total numbers of TRPs, where N TRP It can be 2, 3, 4, etc. UE 115 may then send a CSI report with PMI parameters and FD compensation for a variable number of M TRPs, where M ≤ N TRP -1. When M=N TRP In the case of -1, UE 115 includes FD compensation in the PMI parameters associated with all TRPs except the reference TRP.

[0120] Aspects of the present disclosure relate to the case where UE 115 sends a CSI report with PMI parameters and FD compensation for a variable number of M TRPs, where M <N TRP -1. UE 115 may select a reduced number of TRPs based on different capabilities or operations. In a first example, Figure 5A As illustrated, UE 115 has the capability to perform TRP selection. Using this capability, UE 115 identifies the delay associated with each of network entities 105a-105c. UE 115 identifies that the delay in the channel with network entity 105a is τ 1 , the delay in the channel with the network entity 105c is τ 3 , and the delay in the channel with the network entity 105b is τ 2 Considering the delay τ 1 and τ 3 Different from but not related to the delay τ 2 , UE 115 can determine the delay τ 2can complicate mTRP communications. In this determination, UE 115 may then choose to ignore the delay τ 2 , and selects a CSI report with PMI parameters and FD compensation for M=1 (for network entity 105c) TRPs, where network entity 105a is identified as the reference TRP. Therefore, (M=1)<(N TRP -1), where N TRP =3.

[0121] In the second example, Figure 5B As illustrated, UE 115 has the ability to group TRPs that may have the same delay. For example, network entity 105b includes two antenna panels 500 and 501 in mTRP communication with UE 115. Antenna panel 500 may be oriented in a different spatial direction than antenna panel 501 and may therefore be considered a separate TRP for mTRP communication. In this illustrated example, N TRP =3, including antenna panels 500 and 501 of network entity 105a and network entity 105b. UE 115 identifies that the delay in the channel with network entity 105a is τ 1 , the delay in the channel with the antenna panel 500 of the network entity 105b is τ 2 , and the delay in the channel with the antenna panel 501 of the network entity 105b is also τ 2 Due to the delay τ of antenna panels 500 and 501 2 , so UE 115 can group the FD compensation and PMI parameters related to antenna panels 500 and 501 into a single TRP. Therefore, UE 115 selects CSI reporting with PMI parameters and FD compensation for M=1 (for antenna panels 500 and 501 of network entity 105b) TRPs, where network entity 105a is identified as the reference TRP.

[0122] Various aspects of the present disclosure provide for communicating with UE 115. TRP The identification of a reference TRP among multiple TRPs. The identification of the reference TRP may depend on a configuration from a network entity (e.g., network entities 105a-105c), or may be selected by UE115 based on measurements of performance characteristics of each TRP. In a first optional implementation, a network entity such as network entity 105a-105c may send a configuration message (e.g., a master information block (MIB), a system information block (SIB), a radio resource control (RRC) message, a medium access control-control element (MAC-CE), etc.) including the configuration of the reference TRP. UE 115 will then identify the reference TRP in response to the configuration message.

[0123] In a second example implementation, the UE 115 may select a reference TRP based on performance characteristics of the TRPs (e.g., network entities 105a-105c and antenna panels 500-501). The performance characteristics may include measured aspects such as strength or highest total power. Strength may be determined based on the strongest coefficient indicator (SCI) associated with a particular TRP, while power may be determined based on the strongest coefficient indicator (SCI) associated with that TRP. The UE 115 may determine the coefficients to select the TRP with the highest performance characteristics, such as the TRP associated with SCI or the TRP with the highest total power.

[0124] Figure 6 1 is a block diagram illustrating a wireless network 60 configured with network entities 105a-105b and a UE 115 configured to support Type II CJTCSI reporting with frequency domain compensation at a level finer than the subband size in accordance with one or more aspects. The illustrated portion of the wireless network 60 includes network entities 105a and 105b operating in a distributed mTRP communication operation with the UE 115. Due to the relationship between the UE 115 and each of the network entities 105a and 105b, a delay τ associated with a channel between the UE 115 and the network entity 105b is 2 may be greater than the delay τ associated with the channel between UE 115 and network entity 105a 1 Communication flow 600 illustrates an example PMI subband size of four resource blocks (RBs) per subband. UE 115 may determine Δφ FD compensation based on measurements of CSI-RS and report such FD compensation along with PMI in a CSI report. Communication flow 600 further illustrates an example CSI-RS FD density of 0.5 resource elements (REs) per RB, where f interval represents the FD compensation on the CSI-RS FD density or RE interval, where Figure 6 The illustrated example implementations reflect that f interval =2RB.

[0125] It should be noted that the example values ​​of PMI subband size and CSI-RS FD density are only examples. Aspects of the present invention are not limited to the example sizes. The PMI subband size can generally be at least 2 RBs per subband, while the CSI-RS FD density can be a different RE value per RB.

[0126] As in equation (4), Δφ=2πf rotate (τ 1 -τ 2 ) pointed out that f rotate represents the FD compensation unit determined at a finer or smaller scale than the old PMI subband scale.1 -τ 2 The resolution can be inversely proportional to the total bandwidth The maximum measurable delay can be determined by the inverse ratio of the CSI-RS FD density or RE interval. For example, the specific delay difference τ 1 -τ 2 Can be measured or determined as in represents the total number of REs used for each CSI-RS in the CSI-RS, where f sb Indicates the FD compensation calculated based on the old PMI subband scale. Figure 6 The illustrated example implementation reflects: Q = 2N 3 ; However, other example implementations may include different values ​​of Q. Therefore, the quantization resolution Δφ may be determined according to: where K represents the total number of FD compensation units. For example, a particular Δφ compensation is reported as in according to Figure 6 For the illustrated example implementation, the reported maximum Δφ compensation can be expressed as It is approximately half of 2π. Typically, the phase value including the phase compensation value may generally be in the range between 0 and 2π.

[0127] It should be noted that, in an additional or alternative aspect, the FD interval size f of the CSI-RS RE interval and the FD compensation unit size f rotate Can be the same, f interval =f rotate , which would correspond to the special case where the total number Q of REs used for each of the CSI-RSs would be equal to the total number of FD compensation units, K: Q=K.

[0128] Figure 7 1 is a block diagram illustrating a wireless network 70 configured with network entities 105a-105d and a UE 115 configured to support Type II CJTCSI reporting with frequency domain compensation at a level finer than the subband size according to one or more aspects. TRP = 4 TRPs (network entities 105a-105d) communicate. After identifying the reference TRP and determining the N TRPAfter M TRPs out of M TRPs, UE 115 may send a CSI report including PMI parameters and FD compensation for the non-reference TRP. Due to the large CSI report payload size, the CSI report may be divided into two parts, CSI Part 1 and CSI Part 2 for transmission. CSI Part 1 may be considered more important and configured with a smaller, typically fixed, payload size and sent with higher reliability. CSI Part 1 may include a rank indicator, a channel quality indicator (CQI), and a number of non-zero coefficients (NZC).

[0129] CSI part 2 may have a larger dynamic payload side. The network entity may determine the size of CSI part 2 based on the decoded CSI part 1. For example, a network entity such as network entities 105a-105d may use a rank indicator (RI) and a number of NZCs to determine the payload size of CSI part 2. CSI part 2 may include spatial domain basis selection, frequency domain selection of layer 0-(RI-1), SCI of layer 0-(RI-1), coefficient selection of layer 0-(RI-1), and quantization of NZC of layer 0-(RI-1).

[0130] When generating a CSI report, the UE 115 will quantize the FD compensation amount for the non-reference TRP in order to pack (referred to herein as "packed," "packed," "packed") the information into CSI Part 1 or CSI Part 2. To determine the quantized bits, the FD compensation unit according to aspects of the present disclosure is calculated based on a unit size that is finer or smaller than the PMI subband size, which may be represented as f as noted above. rotate The FD compensation calculated based on the PMI subband size can be expressed as f sb The FD compensation calculated based on the PMI subband size can be an integer multiple of the FD interval of the CSI-RS RE, so that f sb =Zf interval Where Z is an integer. As noted above, the total number of FD compensation units at a finer unit size may be the total number of PMI subbands N 3 The same integer Z times, so that Q = Z·N 3 Quantification of FD compensation representing relative delay difference (e.g., Δφ=2πf rotate (τ 1 -τ 2 )) can be based on Q.

[0131] In a first optional aspect, UE 115 may utilize log for each of all M TRPs. 2 Q bits of quantized FD compensation. For example, for M <N TRP -1 reported relative delay difference (τ ref -τ m, m=1,…,M-1), UE 115 may use log for each of the M TRPs 2 Q bits are used to quantize each FD compensation, representing Δφ m =2πq m / K,q m =0, 1, ..., Q-1. Regarding the first optional aspect, the UE 115 may encapsulate the quantized FD compensation into CSI part 2 for transmission.

[0132] In a second optional aspect, the UE 115 may split the reporting of the FD compensation, wherein one portion of the FD compensation may be encapsulated into CSI part 1 and another portion into CSI part 2. For example, the UE 115 may quantize and report the FD compensation (Δφ) for a first specified TRP among the M reported TRPs. 1 (q 1 )). UE 115 may use log 2 Q bits to quantize the FD compensation (Δφ) of the first specified TRP 1 (q 1 )), and packs these parameters into CSI Part 1. UE 115 may use a second number of bits to quantize the FD compensation Δφ of the remaining M-1 TRPs m (q m ) (if M>1, then m=2, ..., M) and pack these parameters into CSI part 2. This second number of bits may depend on the characterization of the first specified TRP.

[0133] In a first example implementation, the first specified TRP may represent a reported TRP having a minimum delay relative to a reference TRP. In this example implementation, UE 115 may use log 2 (Qq 1 ) bits to quantize the FD compensation Δφ of each TRP in the remaining M-1 TRPs m (q m )(If M>1, then m=2,…,M).

[0134] In a second example implementation, the first specified TRP may represent a reported TRP having a maximum delay relative to a reference TRP. In this example implementation, UE 115 may use log 2 q 1 digits to quantify the FD compensation Δφ of each of the remaining M-1 TRPs m (q m )(If M>1, then m=2, ..., M). Therefore, the number of quantization bits of the remaining M-1 TRPs can be selected according to whether the first specified TRP is associated with the minimum delay or the maximum delay, respectively.

[0135] Figure 8 1 is a block diagram illustrating a wireless network 80 configured with network entities 105a-105c and UE 115 according to one or more aspects, the UE being configured to support Type II CSI TCI reporting with frequency domain compensation at a level finer than the subband size. As noted above, CSI Part 2 has a variable payload size. Additionally, depending on available resources, a UE such as UE 115 may choose to ignore some portions of the payload. Different portions of CSI Part 2 have a priority when determining which portions to omit from the report. UE 115 also uses a specific packing order when assembling CSI Part 2. As illustrated, UE 115 may pack the identification of the spatial domain beam and SCI into Group 0, which is first packed into CSI Part 2 and has the highest priority when determining the omitted portion. The next portion of CSI Part 2 (Group 1) is packed by UE 115 with the FD basis, the reference amplitude of the weaker polarization, the first half of the NZC, and the first portion of the NZC selection. Group 1 also has the next highest priority when determining the portions to be omitted from CSI Part 2. The last portion of CSI Part 2 (Group 2) is packaged by UE 115 with the second half of the NZC and the second half of the NZC selection. Group 2 has the lowest priority when determining the portions to be omitted from CSI Part 2.

[0136] refer to Figure 7 In the second optional aspect of the example, the quantized FD of the remaining M-1 TRPs is compensated by Δφ m (k m , if M>1, then m=2,…,M) encapsulation into CSI part 2 may occur in group 0 or group 1. Similarly, with reference to the second example implementation of the second optional aspect, an additional indication of the TRP index associated with the first specified TRP (whether representing the minimum delay or the maximum delay) may also be encapsulated in group 0 or group 1 of CSI part 2.

[0137] It should be noted that the DMRS port of the CJT PDSCH is considered to be QCL for all the transmission configuration indication (TCI) states associated with all the related TRPs. Using this relationship, for a DMRS port with M TRPs (M <N TRP-1), the delay QCL parameters (e.g., average delay and / or delay spread) of the CSI-RS / TRS from these TRPs m=1,…,M will be valid for the reference TRP, but invalid for each non-reference TRP. UE 115 should then obtain an indication that will allow UE 115 to identify the TCI or TRP associated with the invalid delay QCL parameters. In a first optional aspect, a PDSCH with a single TCI associated with a reference TRP may be scheduled. Because there is a single TCI pointing to the reference TRP, the UE 115 will be able to determine that the delay QCL parameters apply to the reference TRP and not to the non-reference TRP.

[0138] In a second optional aspect, UE 115 may receive a configuration message (e.g., RRC configuration, downlink control information (DCI) indication, etc.) that includes notifying UE 115 that when a PDSCH transmission is scheduled with multiple TCIs and has a delayed QCL (average delay and / or delay spread), UE 115 knows that the delayed QCL is invalid relative to a non-reference TRP. In a first optional implementation, an additional bit of the configuration message may be defined to indicate a TCI state with a valid delayed QCL (reference TRP), for example, 1 bit for 2-TCI, 2 bits for 3- / 4-TCI, and so on. In a second optional implementation, UE 115 may assume that the first TCI state of the PDSCH configuration is associated with a reference TRP. In this implementation, no additional indication or bit will be used to identify the TCI associated with the reference TRP.

[0139] Fig. 9 1 is a block diagram illustrating a wireless network 90 configured with network entities 105a-105b and a UE 115 configured to support Type II CJTCSI reporting with frequency domain compensation at a level finer than the subband size in accordance with one or more aspects. The illustrated portion of the wireless network 90 includes network entities 105a and 105b operating in a distributed mTRP communication operation with the UE 115. Due to the relationship between the UE 115 and each of the network entities 105a and 105b, a delay τ associated with a channel between the UE 115 and the network entity 105b is 2 may be greater than the delay τ associated with the channel between UE 115 and network entity 105a 1 Communication flow 900 illustrates a PMI subband size of four resource blocks (RBs). UE 115 may determine Δφ FD compensation based on measurements of a CSI reference signal (CSI-RS) and report such FD compensation along with the PMI in a CSI report.

[0140] According to aspects of the present disclosure, Δφ FD compensation using a FD compensation unit that is finer or smaller than the PMI subband size may be determined. The wideband or subband CQI reported by the UE 115 may be based on a pre-decoder (PMI) report using FD compensation with a granularity unit size that is finer than the PMI subband size. The CQI subband size may be further larger than the PMI subband size. As illustrated and by way of example only, one CQI subband is equivalent to two PMI subbands. However, the reported wideband and sub-band CQI may be based on a pre-decoder (PMI) report using FD compensation with a granularity unit size that is finer than the PMI subband size. For example, the UE 115 may determine the CQI based on the reported pre-decoder:

[0141]

[0142] Before FD compensation, where TRP#1 represents the reference TRP, and the FD-compensated TRP#2 pre-decoder includes [W TRP#2,unit#0 ,W TRP#2,unit#1 ·e -jΔφ ,…,W TRP#2,unit#(K-1) ·e -j(K-1)Δφ ].

[0143] It should be noted that reference Figure 4 One or more blocks (or operations) described herein may be combined with one or more blocks (or operations) described in another figure in the reference figure. Figure 4 One or more boxes (or operations) of Figure 5A and Figure 5B One or more boxes (or operations) of . Figure 4 One or more boxes associated with Figure 6 One or more boxes associated with it. Figure 7 One or more boxes associated with Figure 1 to Figure 2 One or more associated boxes (or operations) are combined. Additionally or alternatively, the above reference Figure 1 to Figure 2 One or more of the operations described may be combined with reference to Fig.10 One or more combinations of the above operations.

[0144] In one or more aspects, techniques for supporting Type II CJT CSI reporting with frequency domain compensation at a level finer than a subband size may include additional aspects, such as any single aspect or any combination of aspects described below or in conjunction with one or more other processes or apparatus described elsewhere herein. In one or more aspects, supporting Type II CJT CSI reporting with frequency domain compensation at a level finer than a subband size may include an apparatus configured to: TRPThe plurality of CSI parameters are determined by measuring one or more channel conditions of the CSI-RS received by the set of TRPs, where N TRP Corresponding to N TRP The number of TRPs in a set of TRPs; N TRP The reference TRP in the set of TRPs; calculating the frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameters applicable to N TRP a predecoder for each non-reference TRP in a set of N TRPs and corresponding to a delay difference between each non-reference TRP and a reference TRP; and sending a CSI report including CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP There are fewer than N TRPs in the set TRP -1 TRP.

[0145] Additionally, the device may be executed or operated according to one or more aspects as described below. In some specific implementations, the device includes a wireless device, such as a UE. In some specific implementations, the device may include at least one processor, and a memory coupled to the processor. The processor may be configured to perform the operations described herein relative to the device. In some other specific implementations, the device may include a non-transitory computer-readable medium having a program code recorded thereon, and the program code may be executable by a computer for causing the computer to perform the operations described herein with reference to the device. In some specific implementations, the device may include one or more components configured to perform the operations described herein. In some specific implementations, the method of wireless communication may include one or more operations described herein with reference to the device. In some specific implementations, the device may include a chipset consisting of a set of processors and integrated circuit chips, and the set of processors and integrated circuit chips may be grouped together as a chipset deployed in a wireless device (including a UE, a receiver, a transmitter, etc.), and the chipset is configured to execute instructions and control components to perform the operations described herein.

[0146] A first aspect may include a UE configured with CJT mTRP CSI reporting, the UE comprising: a memory storing processor readable code; and at least one processor coupled to the memory. The processor readable code is executable by the at least one processor to cause the UE to: TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of the CSI-RS received by the set of TRPs, where N TRP Corresponding to NTRP The number of TRPs in the set of TRPs; identification N TRP a reference TRP in the set of TRPs; calculating a frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameter applicable to N TRP a predecoder for each non-reference TRP in the set of TRPs, and corresponding to the delay difference between each non-reference TRP and the reference TRP; and sending a CSI report including the CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP The set of TRPs is less than N TRP -1 TRP.

[0147] In a second aspect, alone or in combination with the first aspect, comprising the processor readable code executable by the at least one processor to further cause the UE to perform one of the following: selecting the less than N TRP -1 TRP as the one or more reported TRPs, and exclude N TRP an unselected TRP from the set of TRPs; or a predecoder applicable to a reported TRP from the one or more reported TRPs is identified as indicating N TRP The group of two or more TRPs in the set of TRPs has the same delay difference between each TRP in the group of two or more TRPs and the reference TRP.

[0148] In a third aspect, alone or in combination with one or more of the first aspect or the second aspect, the processor-readable code capable of being executed by the at least one processor to enable the UE to identify the reference TRP includes the processor-readable code capable of being executed by the at least one processor to enable the UE to perform one of the following: receiving a configuration message from a serving network entity, wherein the configuration message identifies the reference TRP; or N TRP The reference TRP having the highest performance characteristics determined by the UE is selected from the set of TRPs.

[0149] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the processor-readable code is executable by the at least one processor to further enable the UE to perform the following: generate the CSI report including the CSI parameters having the pre-decoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 with a fixed payload size and a CSI part 2 with a variable payload size; utilize log 2 Q bits quantize the frequency domain compensation amount of each frequency compensation unit into a quantized frequency domain compensation, where Q represents the total number of resource elements (REs) for each CSI-RS in the CSI-RS; and encapsulate the quantized frequency domain compensation into the CSI part 2.

[0150] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, wherein the CSI part 2 is packed according to a plurality of hierarchical bit groups, wherein the plurality of hierarchical bit groups include: a first bit group packed into the CSI part 2 first, a second bit group packed into the CSI part 2 second, and a third bit group packed into the CSI part 2 last, and wherein the log of the quantized frequency domain compensation 2 Q bits are packed into one of the first group of bits or the second group of bits.

[0151] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the processor-readable code is executable by the at least one processor to further enable the UE to perform the following: generate the CSI report including the CSI parameters having the predecoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 with a fixed payload size and a CSI part 2 with a variable payload size; quantize a first specified frequency domain compensation amount associated with a first specified predecoder of a first specified TRP in the one or more reported TRPs in the frequency domain compensation amount of each frequency compensation unit, wherein the first specified frequency domain compensation amount is calculated using log 2 Q bits are quantized into a quantized first specified frequency domain compensation, where Q represents the total number of REs for each CSI-RS in the CSI-RS; one or more remaining frequency domain compensation amounts in the frequency domain compensation amount of each frequency compensation unit are quantized into the quantized remaining frequency domain compensation using a second number of bits; and the quantized first specified frequency domain compensation is encapsulated into the CSI part 1 and the quantized remaining frequency domain compensation is encapsulated into the CSI part 2.

[0152] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, wherein the first specified frequency domain compensation amount represents one of a minimum delay or a maximum delay of the first specified TRP relative to the reference TRP, and wherein the second number of bits includes one of the following: when the specified frequency domain compensation amount represents the log of the minimum delay 2 (Qq 1 ) digits, where q 1 represents the frequency domain compensation amount of each frequency compensation unit corresponding to the first specified TRP; or when the specified frequency domain compensation amount represents the log of the maximum delay 2 q 1 Units digit.

[0153] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, it includes the processor-readable code capable of being executed by the at least one processor to further enable the UE to perform the following: identifying the TRP index of the first specified TRP; and encapsulating the TRP index into the CSI part 2, wherein the CSI part 2 is packaged according to a hierarchical plurality of bit groups, wherein the hierarchical plurality of bit groups include: first encapsulated into the CSI part 2, second encapsulated into the CSI part 2, and third encapsulated into the CSI part 2, and wherein the TRP index and the second number of bits of the quantized residual frequency domain compensation are encapsulated into one of the first bit group or the second bit group.

[0154] In the ninth aspect, alone and in combination with one or more of the first to eighth aspects, it includes the processor-readable code capable of being executed by the at least one processor to further enable the UE to perform the following: obtain the identification of the reference TRP; receive a PDSCH scheduled using multiple TCI states and having one or more QCL parameters including an average delay or a delay spread; identify the average delay or the delay spread applicable to the reference TRP; and invalidate the average delay or the delay spread with respect to each non-reference TRP.

[0155] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, the processor-readable code capable of being executed by the at least one processor to enable the UE to obtain the identification includes a processor-readable code capable of being executed by the at least one processor to enable the UE to perform the following: TRP An identified TRP in the set of TRPs is identified as the reference TRP, wherein the identified TRP is identified by a first TCI state among the multiple TCI states.

[0156] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the processor-readable code capable of being executed by the at least one processor to enable the UE to obtain the identification includes processor-readable code capable of being executed by the at least one processor to enable the UE to perform the following: receive a downlink control message including an identifier of a TCI state associated with the reference TRP among the multiple TCI states.

[0157] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the size of the frequency domain compensation unit is one-tenth of an integer multiple of a PMI subband.

[0158] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the processor-readable code capable of being executed by the at least one processor to enable the UE to determine multiple CSI parameters includes the processor-readable code capable of being executed by the at least one processor to enable the UE to perform the following: determine a wideband CQI and a subband CQI based on the pre-decoder for the TRP for the one or more reports compensated by the frequency domain compensation amount of each frequency compensation unit.

[0159] A fourteenth aspect includes a method of wireless communication performed by a UE, comprising: TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of the CSI-RS received by the set of TRPs, where N TRP Corresponding to N TRP The number of TRPs in the set of TRPs; identification N TRP a reference TRP in the set of TRPs; calculating a frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameter applicable to N TRP a predecoder for each non-reference TRP in the set of TRPs, and corresponding to the delay difference between each non-reference TRP and the reference TRP; and sending a CSI report including the CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP The set of TRPs is less than N TRP -1 TRP.

[0160] In the fifteenth aspect, alone or in combination with the fourteenth aspect, further comprising one of the following: selecting the less than N TRP -1 TRP as the one or more reported TRPs, and exclude NTRP an unselected TRP from the set of TRPs; or a predecoder applicable to a reported TRP from the one or more reported TRPs is identified as indicating N TRP The group of two or more TRPs in the set of TRPs has the same delay difference between each TRP in the group of two or more TRPs and the reference TRP.

[0161] In the sixteenth aspect, alone or in combination with one or more of the fifteenth aspect or the fourteenth aspect, wherein the identifying the reference TRP comprises one of the following: receiving a configuration message from a serving network entity, wherein the configuration message identifies the reference TRP; or N TRP The reference TRP having the highest performance characteristics determined by the UE is selected from the set of TRPs.

[0162] In the seventeenth aspect, alone or in combination with one or more of the fourteenth to sixteenth amendments, it also includes: generating the CSI report including the CSI parameters having the pre-decoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 with a fixed payload size and a CSI part 2 with a variable payload size; using log 2 Q bits quantize the frequency domain compensation amount of each frequency compensation unit into a quantized frequency domain compensation, where Q represents the total number of REs for each CSI-RS in the CSI-RS; and encapsulate the quantized frequency domain compensation into the CSI part 2.

[0163] In an eighteenth aspect, alone or in combination with one or more of the fourteenth to seventeenth amendments, wherein the CSI part 2 is packed according to a plurality of hierarchical bit groups, wherein the plurality of hierarchical bit groups include: a first bit group packed first into the CSI part 2, a second bit group packed second into the CSI part 2, and a third bit group packed last into the CSI part 2, and wherein the log of the quantized frequency domain compensation 2 Q bits are packed into one of the first group of bits or the second group of bits.

[0164] In the nineteenth aspect, alone or in combination with one or more of the fourteenth to eighteenth aspects, it also includes: generating the CSI report including the CSI parameters having the predecoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 with a fixed payload size and a CSI part 2 with a variable payload size; quantizing a first specified frequency domain compensation amount associated with a first specified predecoder of a first specified TRP in the one or more reported TRPs using log 2 Q bits are quantized into a quantized first specified frequency domain compensation, where Q represents the total number of REs for each CSI-RS in the CSI-RS; one or more remaining frequency domain compensation amounts in the frequency domain compensation amount of each frequency compensation unit are quantized into the quantized remaining frequency domain compensation using a second number of bits; and the quantized first specified frequency domain compensation is encapsulated into the CSI part 1 and the quantized remaining frequency domain compensation is encapsulated into the CSI part 2.

[0165] In the twentieth aspect, alone or in combination with one or more of the fourteenth to nineteenth aspects, wherein the first specified frequency domain compensation amount represents one of a minimum delay or a maximum delay of the first specified TRP relative to the reference TRP, and wherein the second number of bits includes one of the following: when the specified frequency domain compensation amount represents the log of the minimum delay 2 (Qq 1 ) digits, where q 1 represents the frequency domain compensation amount of each frequency compensation unit corresponding to the first specified TRP; or when the specified frequency domain compensation amount represents the log of the maximum delay 2 q 1 Units digit.

[0166] In aspect 21, alone or in combination with one or more of aspects 14 to 20 as amended, it also includes: identifying a TRP index of the first specified TRP; and encapsulating the TRP index into the CSI part 2, wherein the CSI part 2 is packaged according to a hierarchical plurality of bit groups, wherein the hierarchical plurality of bit groups includes: firstly encapsulating a first bit group into the CSI part 2, secondly encapsulating a second bit group into the CSI part 2, and thirdly encapsulating a third bit group into the CSI part 2, and wherein the TRP index and the second number of bits of the quantized residual frequency domain compensation are encapsulated into one of the first bit group or the second bit group.

[0167] In aspect 22, alone or in combination with one or more of aspects amended from aspect 14 to aspect 21, it also includes: obtaining an identification of the reference TRP; receiving a PDSCH scheduled using multiple TCI states and having one or more QCL parameters including an average delay or a delay spread; identifying the average delay or the delay spread applicable to the reference TRP; and invalidating the average delay or the delay spread with respect to each non-reference TRP.

[0168] In a twenty-third aspect, alone or in combination with one or more of the fourteenth to twenty-second aspects, obtaining the identification comprises: TRP An identified TRP in the set of TRPs is identified as the reference TRP, wherein the identified TRP is identified by a first TCI state among the multiple TCI states.

[0169] In aspect twenty-four, alone or in combination with one or more of aspects fourteen to twenty-third amendments, wherein obtaining the identification comprises: receiving a downlink control message comprising an identifier of a TCI state among the multiple TCI states associated with the reference TRP.

[0170] In a twenty-fifth aspect, alone or in combination with one or more of the fourteenth to twenty-fourth aspects, the size of the frequency domain compensation unit is one-tenth of an integer multiple of a PMI subband.

[0171] In aspect twenty-six, alone or in combination with one or more of aspects fourteen to twenty-fifth corrections, wherein the determining of multiple CSI parameters includes: determining a wideband CQI and a subband CQI based on the pre-decoder for the TRP for the one or more reports compensated by the frequency domain compensation amount of each frequency compensation unit.

[0172] A twenty-seventh aspect may include a UE configured with a CJT mTRP CSI report, comprising: TRP A component for determining a plurality of CSI parameters by measuring one or more channel conditions of a CSI-RS received by a set of TRPs, wherein N TRP Corresponding to N TRP The number of TRPs in the set of TRPs; used to identify N TRP A component for calculating a frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameter applicable to N TRPa predecoder for each non-reference TRP in the set of TRPs, and corresponding to the delay difference between each non-reference TRP and the reference TRP; and a component for sending a CSI report including the CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP The set of TRPs is less than N TRP -1 TRP.

[0173] In the twenty-eighth aspect, alone or in combination with the twenty-seventh aspect, further comprising one of the following: for selecting the less than N TRP -1 TRP as the one or more reported TRPs, and exclude N TRP or a pre-decoder for identifying a reported TRP in one of the one or more reported TRPs as indicating N TRP The components of the group of two or more TRPs in the set of TRPs have the same delay difference between each TRP in the group of two or more TRPs and the reference TRP.

[0174] In the twenty-ninth aspect, alone or in combination with one or more of the twenty-seventh aspect or the twenty-eighth aspect, the means for identifying the reference TRP comprises one of the following: a means for receiving a configuration message from a serving network entity, wherein the configuration message identifies the reference TRP; or a means for receiving a configuration message from a serving network entity at N TRP The component selecting the reference TRP having the highest performance characteristics determined by the UE from the set of TRPs.

[0175] In the thirtieth aspect, alone or in combination with one or more of the twenty-seventh to twenty-ninth aspects, it also includes: a component for generating the CSI report including the CSI parameters having the pre-decoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 with a fixed payload size and a CSI part 2 with a variable payload size; a component for utilizing log 2 Q bits quantize the frequency domain compensation amount of each frequency compensation unit into a quantized frequency domain compensation component, where Q represents the total number of resource elements (REs) for each CSI-RS in the CSI-RS; and a component for encapsulating the quantized frequency domain compensation into the CSI part 2.

[0176] In the thirty-first aspect, alone or in combination with one or more of the twenty-seventh to thirtieth aspects, wherein the CSI part 2 is encapsulated according to a plurality of hierarchical bit groups, wherein the plurality of hierarchical bit groups include: a first bit group encapsulated first into the CSI part 2, a second bit group encapsulated second into the CSI part 2, and a third bit group encapsulated last into the CSI part 2, and wherein the log of the quantized frequency domain compensation 2 Q bits are packed into one of the first group of bits or the second group of bits.

[0177] In aspect 32, alone or in combination with one or more of aspects 27 to 31, it also includes: a component for generating the CSI report including the CSI parameters having the predecoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 with a fixed payload size and a CSI part 2 with a variable payload size; a component for quantizing a first specified frequency domain compensation amount associated with a first specified predecoder of a first specified TRP in the one or more reported TRPs, wherein the first specified frequency domain compensation amount utilizes log 2 Q bits are quantized into a quantized first specified frequency domain compensation, where Q represents the total number of REs for each CSI-RS in the CSI-RS; a component for quantizing one or more remaining frequency domain compensation amounts in the frequency domain compensation amount of each frequency compensation unit into the quantized remaining frequency domain compensation using a second number of bits; and a component for encapsulating the quantized first specified frequency domain compensation into the CSI part 1 and encapsulating the quantized remaining frequency domain compensation into the CSI part 2.

[0178] In aspect 33, alone or in combination with one or more of aspects 27 to 32, wherein the first specified frequency domain compensation amount represents one of a minimum delay or a maximum delay of the first specified TRP relative to the reference TRP, and wherein the second number of bits includes one of the following: when the specified frequency domain compensation amount represents the log of the minimum delay 2 (Qq 1 ) digits, where q 1 represents the frequency domain compensation amount of each frequency compensation unit corresponding to the first specified TRP; or when the specified frequency domain compensation amount represents the log of the maximum delay 2 q 1 Units digit.

[0179] In aspect thirty-four, alone or in combination with one or more of aspects twenty-seven to thirty-three, it also includes: a component for identifying a TRP index of the first specified TRP; and a component for encapsulating the TRP index into the CSI part 2, wherein the CSI part 2 is packaged according to a hierarchical plurality of bit groups, wherein the hierarchical plurality of bit groups includes: a first bit group encapsulated first into the CSI part 2, a second bit group encapsulated second into the CSI part 2, and a third bit group encapsulated into the CSI part 2, and wherein the TRP index and the second number of bits of the quantized residual frequency domain compensation are encapsulated into one of the first bit group or the second bit group.

[0180] In aspect thirty-fifth, alone or in combination with one or more of aspects twenty-seven to thirty-fourth, it also includes: a component for obtaining an identification of the reference TRP; a component for receiving a PDSCH scheduled using multiple TCI states and having one or more QCL parameters including an average delay or a delay spread; a component for identifying the average delay or the delay spread applicable to the reference TRP; and a component for invalidating the average delay or the delay spread with respect to each non-reference TRP.

[0181] In a thirty-fifth aspect, alone or in combination with one or more of aspects twenty-seven to thirty-four, wherein the means for obtaining the identification comprises: TRP An identified TRP in the set of TRPs is identified as a component of the reference TRP, wherein the identified TRP is identified by a first TCI state among the multiple TCI states.

[0182] In aspect thirty-seven, alone or in combination with one or more of aspects twenty-seven to thirty-six, the component for obtaining the identification includes: a component for receiving a downlink control message including an identifier of a TCI state associated with the reference TRP among the multiple TCI states.

[0183] In a thirty-eighth aspect, alone or in combination with one or more of aspects twenty-seven to thirty-seven, the size of the frequency domain compensation unit is one-tenth of an integer multiple of a PMI subband.

[0184] In aspect thirty-ninth, alone or in combination with one or more of aspects twenty-seven to thirty-eight, the means for determining multiple CSI parameters includes: means for determining a wideband CQI and a subband CQI based on the pre-decoder for the TRP for the one or more reports compensated by the frequency domain compensation amount of each frequency compensation unit.

[0185] The fortieth aspect may include a non-transitory computer readable medium having program code recorded thereon. The program code includes program code executable by a computer to cause the computer to perform the following: TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of the CSI-RS received by the set of TRPs, where N TRP Corresponding to N TRP The number of TRPs in the set of TRPs; program code executable by the computer to cause the computer to: identify N TRP a reference TRP in the set of TRPs; a program code that can be executed by the computer to cause the computer to perform the following: calculating a frequency domain compensation amount for each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameters applicable to N TRP a predecoder for each non-reference TRP in the set of TRPs, and corresponding to a delay difference between each non-reference TRP and the reference TRP; and program code executable by a computer for causing the computer to: send a CSI report including the CSI parameters of the predecoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the predecoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP The set of TRPs is less than N TRP -1 TRP.

[0186] In the forty-first aspect, alone or in combination with the fortieth aspect, it also includes a program code that can be executed by the computer to cause the computer to perform one of the following: select the less than N TRP -1 TRP as the one or more reported TRPs, and exclude N TRP an unselected TRP from the set of TRPs; or a predecoder applicable to a reported TRP from the one or more reported TRPs is identified as indicating N TRP The group of two or more TRPs in the set of TRPs has the same delay difference between each TRP in the group of two or more TRPs and the reference TRP.

[0187] In a 42nd aspect, alone or in combination with one or more of the 40th aspect or the 41st aspect, the program code executable by the computer for causing the computer to identify the reference TRP includes program code executable by the computer for causing the computer to perform one of the following: receiving a configuration message from a serving network entity, wherein the configuration message identifies the reference TRP; or TRP The reference TRP having the highest performance characteristic determined by the computer is selected from the set of TRPs.

[0188] In the 43rd aspect, alone or in combination with one or more of the 40th to 42nd aspects, including program code that can be executed by the computer to cause the computer to perform the following: generate the CSI report including the CSI parameters having the pre-decoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 with a fixed payload size and a CSI part 2 with a variable payload size; utilize log 2 Q bits quantize the frequency domain compensation amount of each frequency compensation unit into a quantized frequency domain compensation, where Q represents the total number of REs for each CSI-RS in the CSI-RS; and encapsulate the quantized frequency domain compensation into the CSI part 2.

[0189] In a 44th aspect, alone or in combination with one or more of aspects 40 to 43, wherein the CSI part 2 is packed according to a plurality of hierarchical bit groups, wherein the plurality of hierarchical bit groups include: a first bit group first packed into the CSI part 2, a second bit group second packed into the CSI part 2, and a third bit group finally packed into the CSI part 2, and wherein the log of the quantized frequency domain compensation 2 Q bits are packed into one of the first group of bits or the second group of bits.

[0190] In the forty-fifth aspect, alone or in combination with one or more of the fortieth to forty-fourth aspects, it also includes program code that can be executed by the computer to cause the computer to perform the following: generate the CSI report including the CSI parameters having the predecoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 with a fixed payload size and a CSI part 2 with a variable payload size; quantize the first specified frequency domain compensation amount associated with the first specified predecoder of the first specified TRP in the one or more reported TRPs using log 2Q bits are quantized into a quantized first specified frequency domain compensation, where Q represents the total number of REs for each CSI-RS in the CSI-RS; one or more remaining frequency domain compensation amounts in the frequency domain compensation amount of each frequency compensation unit are quantized into the quantized remaining frequency domain compensation using a second number of bits; and the quantized first specified frequency domain compensation is encapsulated into the CSI part 1 and the quantized remaining frequency domain compensation is encapsulated into the CSI part 2.

[0191] In a 46th aspect, alone or in combination with one or more of aspects 40 to 45, wherein the first specified frequency domain compensation amount represents one of a minimum delay or a maximum delay of the first specified TRP relative to the reference TRP, and wherein the second number of bits includes one of the following: when the specified frequency domain compensation amount represents the log of the minimum delay 2 (Qq 1 ) digits, where q 1 represents the frequency domain compensation amount of each frequency compensation unit corresponding to the first specified TRP; or when the specified frequency domain compensation amount represents the log of the maximum delay 2 q 1 Units digit.

[0192] In the forty-seventh aspect, alone or in combination with one or more of the fortieth to forty-sixth aspects, it also includes program code capable of being executed by the computer to cause the computer to perform the following: identifying the TRP index of the first specified TRP; and encapsulating the TRP index into the CSI part 2, wherein the CSI part 2 is packaged according to a hierarchical plurality of bit groups, wherein the hierarchical plurality of bit groups includes: first encapsulated into the CSI part 2 a first bit group, secondly encapsulated into the CSI part 2 a second bit group, and thirdly encapsulated into the CSI part 2, and wherein the TRP index and the second number of bits of the quantized residual frequency domain compensation are encapsulated into one of the first bit group or the second bit group.

[0193] In aspect 48, alone or in combination with one or more of aspects 40 to 47, it also includes program code capable of being executed by the computer to cause the computer to perform the following: obtain an identification of the reference TRP; receive a PDSCH scheduled using multiple TCI states and having one or more QCL parameters including an average delay or a delay spread; identify the average delay or the delay spread applicable to the reference TRP; and invalidate the average delay or the delay spread with respect to each non-reference TRP.

[0194] In the 49th aspect, alone or in combination with one or more of the 40th to 48th aspects, the program code capable of being executed by the computer to cause the computer to obtain the identification includes program code capable of being executed by the computer to cause the computer to perform the following: TRP An identified TRP in the set of TRPs is identified as the reference TRP, wherein the identified TRP is identified by a first TCI state among the multiple TCI states.

[0195] In the fiftieth aspect, alone or in combination with one or more of aspects 40 to 49, the program code capable of being executed by the computer to cause the computer to obtain the identification includes program code capable of being executed by the computer to cause the computer to perform the following: receiving a downlink control message including an identifier of a TCI state associated with the reference TRP among the multiple TCI states.

[0196] In the fifty-first aspect, alone or in combination with one or more of the fortieth to fiftieth aspects, the size of the frequency domain compensation unit is one-tenth of an integer multiple of the PMI subband.

[0197] In aspect 52, alone or in combination with one or more of aspects 40 to 51, the program code executable by the computer for causing the computer to determine a plurality of CSI parameters includes program code executable by the computer for causing the computer to perform the following: determining a wideband CQI and a subband CQI based on the pre-decoder for the TRP for the one or more reports compensated by the frequency domain compensation amount of each frequency compensation unit.

[0198] It should be understood by those skilled in the art that any of a variety of different technologies and techniques may be used to represent information and signals. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or optical particles, or any combination thereof.

[0199] In this article, relative to Figures 1 to 10The components, functional blocks and modules include processors, electronic devices, hardware devices, electronic components, logical circuits, memories, software codes, firmware codes, etc. or any combination thereof. Software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, processes, and / or functions and other examples, whether they are described in software, firmware, middleware, microcode, hardware description languages ​​or other terms. In addition, the features discussed herein may be implemented via dedicated processor circuits, via executable instructions or a combination thereof.

[0200] The technician will further understand that the various exemplary logic boxes, modules, circuits and algorithm steps described in conjunction with the disclosure of this article can be implemented as electronic hardware, computer software or a combination of the two. In order to clearly illustrate this interchangeability of hardware and software, various exemplary components, blocks, modules, circuits and steps have been generally described above in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints proposed to the entire system. The technician can implement the described functionality in different ways for each specific application, but such specific implementation decisions should not be interpreted as causing departure from the scope of the present disclosure. The technician will also easily recognize that the order or combination of components, methods or interactions described herein are only examples, and the components, methods or interactions of various aspects of the present disclosure can be combined or performed in a manner other than the manner illustrated and described herein.

[0201] The various illustrative logics, logic blocks, modules, circuits, and algorithmic processes described in conjunction with the specific implementations disclosed herein may be implemented as electronic hardware, computer software, or a combination of both. The interchangeability of hardware and software has been generally described in terms of functionality and exemplified in the various illustrative components, blocks, modules, circuits, and processes described above. Whether such functionality is implemented in hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0202] The hardware and data processing apparatus for implementing the various exemplary logics, logic blocks, modules and circuits described in conjunction with the various aspects disclosed herein may be implemented or executed using a general purpose single-chip or multi-chip processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic component, a discrete hardware component or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller or state machine. In some specific implementations, a processor may be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration. In some specific implementations, specific processes and methods may be performed by circuits specific to a given function.

[0203] In one or more aspects, the functions described may be implemented in hardware, digital electronic circuitry, computer software, firmware, including the structures disclosed in this specification and their structural equivalents, or any combination thereof. Specific implementations of the subject matter described in this specification may also be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on computer storage media for execution by data processing apparatus or for controlling the operation of data processing apparatus.

[0204] If implemented in software, the function may be stored as one or more instructions or codes on a computer-readable medium or sent via a computer-readable medium. The process of the method or algorithm disclosed herein may be implemented in a processor executable software module that may reside on a computer-readable medium. Computer-readable media include both computer storage media and communication media, and the communication media include any media that can be implemented to transfer a computer program from one place to another. The storage medium may be any available medium that a computer can access. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium that can be used to store the required program code in the form of an instruction or data structure and can be accessed by a computer. Moreover, any connection may be appropriately referred to as a computer-readable medium. Disks and optical disks as used herein include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), floppy disks, and blue-ray disks, wherein disks generally reproduce data magnetically, and optical disks reproduce data optically with lasers. The above combination should also be included in the scope of computer-readable media. Additionally, the operations of a method or algorithm may reside as a code and instruction set, or any combination of code and instruction sets, on a machine-readable medium or computer-readable medium, which may be incorporated into a computer program product.

[0205] Various modifications to the specific implementations described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to some other specific implementations without departing from the spirit or scope of the disclosure. Therefore, the claims are not intended to be limited to the specific implementations shown herein, but are to be consistent with the broadest scope consistent with the disclosure, the principles and novel features disclosed herein.

[0206] Additionally, one of ordinary skill in the art will readily recognize that the terms "upper" and "lower" are sometimes used for ease of describing the drawings and indicate relative positions corresponding to the orientation of the drawings on a correctly oriented page, and may not reflect the correct orientation of any device as implemented.

[0207] Certain features described in this specification in the context of separate implementations may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented in multiple implementations, either individually or in any suitable subcombination. Furthermore, while features may be described above as functioning in certain combinations and even initially claimed as such, one or more features from a claimed combination may in some cases be removed from the combination, and a claimed combination may be directed to subcombinations or variations of subcombinations.

[0208] Similarly, although the operations are depicted in a specific order in the figure, this should not be understood as requiring such operations to be performed in the specific order shown or in a sequential order, or to perform all the illustrated operations to achieve the desired result. In addition, the accompanying drawings can schematically depict one or more example processes in the form of a flow chart. However, other operations that are not depicted can be combined in the schematically illustrated example process. For example, one or more additional operations can be performed before, after, at the same time or between any illustrated operations. In some environments, multitasking and parallel processing are advantageous. In addition, the separation of various system components in the specific implementation described above should not be understood as requiring such separation in all specific implementations, and it should be understood that the program components and systems can generally be integrated together in a single software product or packaged into multiple software products. Additionally, some other specific implementations also fall within the scope of the appended claims. In some cases, the actions narrated in the claims can be performed in different orders and still achieve the desired result.

[0209] As used herein, including in the claims, the term "or" used in a list of two or more items means that any of the listed items may be employed alone, or any combination of two or more of the listed items may be employed. For example, if a composition is described as containing components A, B, or C, the composition may contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination. Also, as used herein, including in the claims, "or" as used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) or any combination of any of these. The term "substantially" is defined as to a large extent, but not necessarily entirely, what is specified (and includes what is specified; for example, substantially 90 degrees includes 90 degrees, and substantially parallel includes parallel), as understood by one of ordinary skill in the art. In any disclosed implementation, the term "substantially" may be replaced with "within [percent] of" a specified content, where the percentage includes 0.1%, 1%, 5%, or 10%.

[0210] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Therefore, the disclosure is not intended to be limited to the examples and designs described herein, but to be consistent with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A user equipment (UE) configured with coherent joint transmission (CJT) multiple transmit receive point (mTRP) channel state information (CSI) reporting, the UE comprising: a memory storing processor readable code; and at least one processor, the at least one processor being coupled to the memory, the processor readable code being executable by the at least one processor to cause the UE to: According to N TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of a CSI reference signal (CSI-RS) received by a set of transmit receive points (TRPs), where N TRP Corresponding to N TRP the number of TRPs in the set of TRPs; Logo N TRP a reference TRP in the set of TRPs; Calculate the frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates the CSI parameter applicable to N TRP a predecoder for each non-reference TRP in the set of TRPs and corresponding to a delay difference between each non-reference TRP and the reference TRP; as well as sending a CSI report including the CSI parameters of the pre-decoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the pre-decoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP The set of TRPs is less than N TRP -1 TRP.

2. The UE of claim 1, comprising the processor-readable code executable by the at least one processor to further cause the UE to perform one of the following: Select the number of less than N TRP -1 TRP as the one or more reported TRPs, and exclude N TRP an unselected TRP from the set of TRPs; or A predecoder applicable to a reported TRP of the one or more reported TRPs is identified as N TRP The group of two or more TRPs in the set of TRPs has the same delay difference between each TRP in the group of two or more TRPs and the reference TRP.

3. The UE of claim 1, wherein the processor-readable code executable by the at least one processor to cause the UE to identify the reference TRP comprises processor-readable code executable by the at least one processor to cause the UE to do one of: receiving a configuration message from a serving network entity, wherein the configuration message identifies the reference TRP; or In N TRP The reference TRP having the highest performance characteristics determined by the UE is selected from the set of TRPs.

4. The UE of claim 1, comprising the processor-readable code executable by the at least one processor to further cause the UE to: generating the CSI report including the CSI parameters having the frequency domain compensation amount of the pre-decoder and each frequency compensation unit, wherein the CSI report includes a CSI part 1 having a fixed payload size and a CSI part 2 having a variable payload size; quantizing the frequency domain compensation amount of each frequency compensation unit into a quantized frequency domain compensation using log2Q bits, where Q represents a total number of resource elements (REs) for each of the CSI-RSs; as well as The quantized frequency domain compensation is encapsulated into the CSI part 2.

5. The UE according to claim 4, The CSI part 2 is encapsulated according to a plurality of hierarchical bit groups, wherein the plurality of hierarchical bit groups include: First, the first bit group is packed into the CSI part 2. Next is packed into the second bit group of the CSI part 2, and Finally, it is packed into the third bit group of the CSI part 2, and The log2Q bits of the quantized frequency domain compensation are packed into one of the first bit group or the second bit group.

6. The UE of claim 1, comprising the processor-readable code executable by the at least one processor to further cause the UE to: generating the CSI report including the CSI parameters having the frequency domain compensation amount of the pre-decoder and each frequency compensation unit, wherein the CSI report includes a CSI part 1 having a fixed payload size and a CSI part 2 having a variable payload size; quantizing a first designated frequency domain compensation amount associated with a first designated predecoder of a first designated TRP of the one or more reported TRPs in the frequency domain compensation amount of each frequency compensation unit, wherein the first designated frequency domain compensation amount is quantized into the quantized first designated frequency domain compensation using log2Q bits, wherein Q represents a total number of resource elements (REs) for each of the CSI-RSs; quantizing one or more remaining frequency domain compensation amounts in the frequency domain compensation amount of each frequency compensation unit into quantized remaining frequency domain compensation using a second number of bits; and The quantized first specified frequency domain compensation is packed into the CSI part 1 and the quantized remaining frequency domain compensation is packed into the CSI part 2.

7. The UE according to claim 6, wherein the first specified frequency domain compensation amount represents one of a minimum delay or a maximum delay of the first specified TRP relative to the reference TRP, and wherein the second number of bits comprises one of: when the specified frequency domain compensation amount represents log2(Q-q1) bits of the minimum delay, where q1 represents the frequency domain compensation amount of each frequency compensation unit corresponding to the first specified TRP, or When the specified frequency domain compensation amount represents log2q1 bits of the maximum delay.

8. The UE of claim 7, comprising the processor-readable code executable by the at least one processor to further cause the UE to: A TRP index identifying the first specified TRP; and The TRP index is encapsulated into the CSI part 2, wherein the CSI part 2 is encapsulated according to a hierarchical plurality of bit groups, wherein the hierarchical plurality of bit groups comprises: First, the first bit group is packed into the CSI part 2. Next is packed into the second bit group of the CSI part 2, and is packed into the third bit group of the CSI part 2, and Wherein the TRP index and the second number of bits of the quantized residual frequency domain compensation are packed into one of the first bit group or the second bit group.

9. The UE of claim 1, comprising the processor-readable code executable by the at least one processor to further cause the UE to: Obtaining an identification of the reference TRP; receiving a PDSCH scheduled with a plurality of transmit configuration indication (TCI) states and having one or more quasi co-location (QCL) parameters including an average delay or a delay spread; identifying the average delay or the delay spread applicable to the reference TRP; and Invalidate the average delay or the delay spread with respect to each non-reference TRP.

10. The UE according to claim 9, wherein the processor-readable code executable by the at least one processor to enable the UE to obtain the identification comprises a processor-readable code executable by the at least one processor to enable the UE to perform the following: TRP An identified TRP in the set of TRPs is identified as the reference TRP, wherein the identified TRP is identified by a first TCI state among the multiple TCI states.

11. The UE of claim 9, wherein the processor-readable code executable by the at least one processor to enable the UE to obtain the identification comprises processor-readable code executable by the at least one processor to enable the UE to: Receive a downlink control message including an identifier of a TCI state among the multiple TCI states associated with the reference TRP.

12. The UE according to claim 1, wherein a size of the frequency domain compensation unit is one-tenth of an integer multiple of a precoding matrix indicator (PMI) subband.

13. The UE of claim 12, wherein the processor-readable code executable by the at least one processor to cause the UE to determine a plurality of CSI parameters comprises the processor-readable code executable by the at least one processor to cause the UE to: A wideband channel quality indicator (CQI) and a subband CQI are determined based on the pre-decoder for the one or more reported TRPs compensated by the frequency domain compensation amount of each frequency compensation unit.

14. A method of wireless communication performed by a user equipment (UE), the method comprising: According to N TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of a CSI reference signal (CSI-RS) received by a set of transmit receive points (TRPs), where N TRP Corresponding to N TRP the number of TRPs in the set of TRPs; Logo N TRP a reference TRP in the set of TRPs; Calculate the frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates the CSI parameter applicable to N TRP a predecoder for each non-reference TRP in the set of TRPs and corresponding to a delay difference between each non-reference TRP and the reference TRP; as well as sending a CSI report including the CSI parameters of the pre-decoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the pre-decoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP The set of TRPs is less than N TRP -1 TRP.

15. The method of claim 14, further comprising one of the following: Select the number of less than N TRP -1 TRP as the one or more reported TRPs, and exclude N TRP an unselected TRP from the set of TRPs; or A predecoder applicable to a reported TRP of the one or more reported TRPs is identified as N TRP The group of two or more TRPs in the set of TRPs has the same delay difference between each TRP in the group of two or more TRPs and the reference TRP.

16. The method of claim 14, wherein the identifying the reference TRP comprises one of: receiving a configuration message from a serving network entity, wherein the configuration message identifies the reference TRP; or In N TRP The reference TRP having the highest performance characteristics determined by the UE is selected from the set of TRPs.

17. The method according to claim 14, further comprising: generating the CSI report including the CSI parameters having the frequency domain compensation amount of the pre-decoder and each frequency compensation unit, wherein the CSI report includes a CSI part 1 having a fixed payload size and a CSI part 2 having a variable payload size; quantizing the frequency domain compensation amount of each frequency compensation unit into a quantized frequency domain compensation using log2Q bits, where Q represents a total number of resource elements (REs) for each of the CSI-RSs; as well as The quantized frequency domain compensation is encapsulated into the CSI part 2.

18. The method according to claim 17, The CSI part 2 is encapsulated according to a plurality of hierarchical bit groups, wherein the plurality of hierarchical bit groups include: First, the first bit group is packed into the CSI part 2. Next is packed into the second bit group of the CSI part 2, and Finally, it is packed into the third bit group of the CSI part 2, and The log2Q bits of the quantized frequency domain compensation are packed into one of the first bit group or the second bit group.

19. The method according to claim 14, further comprising: generating the CSI report including the CSI parameters having the frequency domain compensation amount of the pre-decoder and each frequency compensation unit, wherein the CSI report includes a CSI part 1 having a fixed payload size and a CSI part 2 having a variable payload size; quantizing a first designated frequency domain compensation amount associated with a first designated predecoder of a first designated TRP of the one or more reported TRPs in the frequency domain compensation amount of each frequency compensation unit, wherein the first designated frequency domain compensation amount is quantized into the quantized first designated frequency domain compensation using log2Q bits, wherein Q represents a total number of resource elements (REs) for each of the CSI-RSs; quantizing one or more remaining frequency domain compensation amounts in the frequency domain compensation amount of each frequency compensation unit into quantized remaining frequency domain compensation using a second number of bits; as well as The quantized first specified frequency domain compensation is packed into the CSI part 1 and the quantized remaining frequency domain compensation is packed into the CSI part 2.

20. The method according to claim 19, wherein the first specified frequency domain compensation amount represents one of a minimum delay or a maximum delay of the first specified TRP relative to the reference TRP, and wherein the second number of bits comprises one of: when the specified frequency domain compensation amount represents log2(Q-q1) bits of the minimum delay, where q1 represents the frequency domain compensation amount of each frequency compensation unit corresponding to the first specified TRP, or When the specified frequency domain compensation amount represents log2q1 bits of the maximum delay.

21. The method according to claim 20, further comprising: A TRP index identifying the first designated TRP; as well as The TRP index is encapsulated into the CSI part 2, wherein the CSI part 2 is encapsulated according to a hierarchical plurality of bit groups, wherein the hierarchical plurality of bit groups comprises: First, the first bit group is packed into the CSI part 2. Next is packed into the second bit group of the CSI part 2, and is packed into the third bit group of the CSI part 2, and Wherein the TRP index and the second number of bits of the quantized residual frequency domain compensation are packed into one of the first bit group or the second bit group.

22. The method of claim 14, further comprising: Obtaining an identification of the reference TRP; receiving a PDSCH scheduled with a plurality of transmit configuration indication (TCI) states and having one or more quasi co-location (QCL) parameters including an average delay or a delay spread; identifying the average delay or the delay spread applicable to the reference TRP; and Invalidate the average delay or the delay spread with respect to each non-reference TRP.

23. The method according to claim 22, wherein obtaining the identification comprises: N TRP An identified TRP in the set of TRPs is identified as the reference TRP, wherein the identified TRP is identified by a first TCI state among the multiple TCI states.

24. The method according to claim 22, wherein obtaining the identification comprises: Receive a downlink control message including an identifier of a TCI state among the multiple TCI states associated with the reference TRP.

25. The method of claim 14, wherein a size of the frequency domain compensation unit is one-tenth of an integer multiple of a precoding matrix indicator (PMI) subband.

26. The method of claim 25, wherein the determining a plurality of CSI parameters comprises: A wideband channel quality indicator (CQI) and a subband CQI are determined based on the pre-decoder for the one or more reported TRPs compensated by the frequency domain compensation amount of each frequency compensation unit.

27. A user equipment (UE) configured with coherent joint transmission (CJT) multiple transmit receive point (mTRP) channel state information (CSI) reporting, comprising: For use according to N TRP A component for determining a plurality of CSI parameters by measuring one or more channel conditions of a CSI reference signal (CSI-RS) received by a set of transmit receive points (TRPs), wherein N TRP Corresponding to N TRP the number of TRPs in the set of TRPs; Used to identify N TRP a component of a reference TRP in said set of TRPs; A component for calculating a frequency domain compensation amount for each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the CSI parameter applicable to N TRP a predecoder for each non-reference TRP in the set of TRPs and corresponding to a delay difference between each non-reference TRP and the reference TRP; and means for sending a CSI report including the CSI parameters of the pre-decoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the pre-decoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP The set of TRPs is less than N TRP -1 TRP.

28. The UE according to claim 27, further comprising at least one of the following: For selecting the number less than N TRP -1 TRP as the one or more reported TRPs and exclude N TRP components of an unselected TRP in said set of TRPs; or for identifying a predecoder applicable to a reported TRP of the one or more reported TRPs as indicating N TRP The components of the group of two or more TRPs in the set of TRPs have the same delay difference between each TRP in the group of two or more TRPs and the reference TRP.

29. The UE of claim 27, wherein the means for identifying the reference TRP comprises one of: means for receiving a configuration message from a serving network entity, wherein the configuration message identifies the reference TRP; or For use in N TRP A component of selecting the reference TRP having the highest performance characteristics determined by the UE from the set of TRPs.

30. The UE according to claim 27, further comprising: means for generating the CSI report including the CSI parameters having the pre-decoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 having a fixed payload size and a CSI part 2 having a variable payload size; means for quantizing the frequency domain compensation amount of each frequency compensation unit into a quantized frequency domain compensation using log2Q bits, where Q represents a total number of resource elements (REs) for each of the CSI-RSs; and Means for encapsulating the quantized frequency domain compensation into the CSI part 2.

31. The UE according to claim 30, The CSI part 2 is encapsulated according to a plurality of hierarchical bit groups, wherein the plurality of hierarchical bit groups include: First, the first bit group is packed into the CSI part 2. Next is packed into the second bit group of the CSI part 2, and Finally, it is packed into the third bit group of the CSI part 2, and The log2Q bits of the quantized frequency domain compensation are packed into one of the first bit group or the second bit group.

32. The UE according to claim 27, further comprising: means for generating the CSI report including the CSI parameters having the pre-decoder and the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes a CSI part 1 having a fixed payload size and a CSI part 2 having a variable payload size; means for quantizing a first designated frequency domain compensation amount associated with a first designated predecoder of a first designated TRP of the one or more reported TRPs in the frequency domain compensation amount of each frequency compensation unit, wherein the first designated frequency domain compensation amount is quantized into the quantized first designated frequency domain compensation using log2Q bits, wherein Q represents a total number of resource elements (REs) for each of the CSI-RSs; means for quantizing one or more remaining frequency domain compensation amounts in the frequency domain compensation amount of each frequency compensation unit into quantized remaining frequency domain compensation using a second number of bits; and Means for packaging the quantized first specified frequency domain compensation into said CSI Part 1 and packaging the quantized remaining frequency domain compensation into said CSI Part 2.

33. The UE according to claim 32, wherein the first specified frequency domain compensation amount represents one of a minimum delay or a maximum delay of the first specified TRP relative to the reference TRP, and wherein the second number of bits comprises one of: when the specified frequency domain compensation amount represents log2(Q-q1) bits of the minimum delay, where q1 represents the frequency domain compensation amount of each frequency compensation unit corresponding to the first specified TRP, or When the specified frequency domain compensation amount represents log2q1 bits of the maximum delay.

34. The UE according to claim 33, further comprising: means for identifying a TRP index of the first specified TRP; and means for packing the TRP index into the CSI part 2, wherein the CSI part 2 is packed according to a hierarchical plurality of bit groups, wherein the hierarchical plurality of bit groups comprises: First, the first bit group is packed into the CSI part 2. Next is packed into the second bit group of the CSI part 2, and is packed into the third bit group of the CSI part 2, and Wherein the TRP index and the second number of bits of the quantized residual frequency domain compensation are packed into one of the first bit group or the second bit group.

35. The UE according to claim 27, further comprising: means for obtaining an identification of said reference TRP; means for receiving a PDSCH scheduled with multiple transmit configuration indication (TCI) states and having one or more quasi co-location (QCL) parameters including an average delay or a delay spread; means for identifying said average delay or said delay spread applicable to said reference TRP; and Means for invalidating said average delay or said delay spread with respect to said each non-reference TRP.

36. The UE of claim 35, wherein the means for obtaining the identification comprises: For N TRP An identified TRP in the set of TRPs is identified as a component of the reference TRP, wherein the identified TRP is identified by a first TCI state among the multiple TCI states.

37. The UE of claim 35, wherein the means for obtaining the identification comprises: A component for receiving a downlink control message including an identifier of a TCI state associated with the reference TRP among the multiple TCI states.

38. The UE of claim 27, wherein a size of the frequency domain compensation unit is one-tenth of an integer multiple of a precoding matrix indicator (PMI) subband.

39. The UE of claim 38, wherein the means for determining a plurality of CSI parameters comprises: Means for determining a wideband channel quality indicator (CQI) and a subband CQI based on the pre-decoder for the one or more reported TRPs compensated by the frequency domain compensation amount of each frequency compensation unit.

40. A non-transitory computer readable medium having a program code recorded thereon, the program code comprising: The program code capable of being executed by a computer to cause the computer to perform the following: TRP The plurality of CSI parameters are determined by measuring one or more channel conditions of a CSI reference signal (CSI-RS) received by a set of transmit receive points (TRPs), where N TRP Corresponding to N TRP the number of TRPs in the set of TRPs; Program code capable of being executed by the computer to cause the computer to: identify N TRP a reference TRP in the set of TRPs; The program code capable of being executed by the computer to cause the computer to perform the following: calculating a frequency domain compensation amount of each frequency domain compensation unit, wherein the frequency domain compensation amount of each frequency domain compensation unit compensates for the frequency domain compensation amount applicable to N in the CSI parameter. TRP a predecoder for each non-reference TRP in the set of TRPs and corresponding to a delay difference between each non-reference TRP and the reference TRP; and program code executable by the computer to cause the computer to: send a CSI report including the CSI parameters of the pre-decoder compensated by the frequency domain compensation amount of each frequency compensation unit, wherein the CSI report includes the pre-decoder applicable to one or more reported TRPs, and wherein the one or more reported TRPs include N TRP The set of TRPs is less than N TRP -1 TRP.

41. The non-transitory computer readable medium of claim 40, further comprising program code executable by the computer for causing the computer to do one of: Select the number of less than N TRP -1 TRP as the one or more reported TRPs, and exclude N TRP an unselected TRP from the set of TRPs; or A predecoder applicable to a reported TRP of the one or more reported TRPs is identified as N TRP The group of two or more TRPs in the set of TRPs has the same delay difference between each TRP in the group of two or more TRPs and the reference TRP.

42. The non-transitory computer readable medium of claim 40, wherein the program code executable by the computer for causing the computer to identify the reference TRP comprises program code executable by the computer for causing the computer to one of: receiving a configuration message from a serving network entity, wherein the configuration message identifies the reference TRP; or In N TRP The reference TRP having the highest performance characteristic determined by the computer is selected from the set of TRPs.

43. The non-transitory computer readable medium of claim 40, comprising program code executable by the computer for causing the computer to: generating the CSI report including the CSI parameters having the frequency domain compensation amount of the pre-decoder and each frequency compensation unit, wherein the CSI report includes a CSI part 1 having a fixed payload size and a CSI part 2 having a variable payload size; quantizing the frequency domain compensation amount of each frequency compensation unit into a quantized frequency domain compensation using log2Q bits, where Q represents a total number of resource elements (REs) for each of the CSI-RSs; as well as The quantized frequency domain compensation is encapsulated into the CSI part 2.

44. The non-transitory computer readable medium of claim 43, The CSI part 2 is encapsulated according to a plurality of hierarchical bit groups, wherein the plurality of hierarchical bit groups include: First, the first bit group is packed into the CSI part 2. Next is packed into the second bit group of the CSI part 2, and Finally, it is packed into the third bit group of the CSI part 2, and The log2Q bits of the quantized frequency domain compensation are packed into one of the first bit group or the second bit group.

45. The non-transitory computer readable medium of claim 40, further comprising program code executable by the computer for causing the computer to: generating the CSI report including the CSI parameters having the frequency domain compensation amount of the pre-decoder and each frequency compensation unit, wherein the CSI report includes a CSI part 1 having a fixed payload size and a CSI part 2 having a variable payload size; quantizing a first designated frequency domain compensation amount associated with a first designated predecoder of a first designated TRP of the one or more reported TRPs in the frequency domain compensation amount of each frequency compensation unit, wherein the first designated frequency domain compensation amount is quantized into the quantized first designated frequency domain compensation using log2Q bits, wherein Q represents a total number of resource elements (REs) for each of the CSI-RSs; quantizing one or more remaining frequency domain compensation amounts in the frequency domain compensation amount of each frequency compensation unit into quantized remaining frequency domain compensation using a second number of bits; and The quantized first specified frequency domain compensation is packed into the CSI part 1 and the quantized remaining frequency domain compensation is packed into the CSI part 2.

46. ​​The non-transitory computer readable medium of claim 45, wherein the first specified frequency domain compensation amount represents one of a minimum delay or a maximum delay of the first specified TRP relative to the reference TRP, and wherein the second number of bits comprises one of: when the specified frequency domain compensation amount represents log2(Q-q1) bits of the minimum delay, where q1 represents the frequency domain compensation amount of each frequency compensation unit corresponding to the first specified TRP, or When the specified frequency domain compensation amount represents log2q1 bits of the maximum delay.

47. The non-transitory computer readable medium of claim 46, further comprising program code executable by the computer for causing the computer to: A TRP index identifying the first specified TRP; and The TRP index is encapsulated into the CSI part 2, wherein the CSI part 2 is encapsulated according to a hierarchical plurality of bit groups, wherein the hierarchical plurality of bit groups comprises: First, the first bit group is packed into the CSI part 2. Next is packed into the second bit group of the CSI part 2, and is packed into the third bit group of the CSI part 2, and Wherein the TRP index and the second number of bits of the quantized residual frequency domain compensation are packed into one of the first bit group or the second bit group.

48. The non-transitory computer readable medium of claim 40, further comprising program code executable by the computer for causing the computer to: Obtaining an identification of the reference TRP; receiving a PDSCH scheduled with a plurality of transmit configuration indication (TCI) states and having one or more quasi co-location (QCL) parameters including an average delay or a delay spread; identifying the average delay or the delay spread applicable to the reference TRP; and Invalidate the average delay or the delay spread with respect to each non-reference TRP.

49. The non-transitory computer readable medium of claim 48, wherein the program code executable by the computer to cause the computer to obtain the identification comprises program code executable by the computer to cause the computer to: TRP An identified TRP in the set of TRPs is identified as the reference TRP, wherein the identified TRP is identified by a first TCI state among the multiple TCI states.

50. A non-transitory computer-readable medium according to claim 48, wherein the program code capable of being executed by the computer to cause the computer to obtain the identification includes program code capable of being executed by the computer to cause the computer to perform the following: receiving a downlink control message including an identifier of a TCI state associated with the reference TRP among the multiple TCI states.

51. The non-transitory computer readable medium of claim 40, wherein a size of the frequency domain compensation unit is one-tenth of an integer multiple of a precoding matrix indicator (PMI) subband.

52. A non-transitory computer-readable medium according to claim 51, wherein the program code capable of being executed by the computer to cause the computer to determine multiple CSI parameters includes program code capable of being executed by the computer to cause the computer to perform the following: determining a wideband channel quality indicator (CQI) and a subband CQI based on the pre-decoder for the one or more reported TRPs compensated by the frequency domain compensation amount of each frequency compensation unit.

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