Method executed by user equipment, and user equipment

Abstract

Provided in the present invention are a method executed by a user equipment, and a user equipment. The method comprises the following steps: receiving configuration information for channel state information (CSI) reporting; and determining the priority of the CSI reporting at least on the basis of the configuration information.

Description

Methods executed by user equipment and user equipment Technical Field

[0001] This invention relates to the field of wireless communication technology, and more particularly to a method performed by a user equipment and a corresponding user equipment. Background Technology

[0002] In Rel-15NR, user equipment (UE) can perform various downlink channel measurements and channel state information (CSI) reports based on network configuration information. The measurement configuration and corresponding reporting methods are configured through a reporting configuration, represented in the 3GPP protocol by the RRC parameter CSI-ReportConfig. Specifically, the reporting configuration includes the following three aspects:

[0003] 1) The number of measurements reported, i.e. how many measurement items need to be reported to the network.

[0004] A measurement report needs to explicitly configure which measurement items the user equipment (UE) needs to report. For example, a measurement report may include three items: Channel Quality Indicator (CQI), Channel Rank Indicator (RI), and Precoder Matrix Indicator (PMI), collectively referred to as Channel State Information. A measurement report can also include only one item, such as reporting the received signal strength, called Reference Signal Received Power (RSRP). RSRP is also a critical measurement, typically used in higher-level Radio Resource Management (RRM). In NR, RSRP reporting is introduced at the physical layer for Beam Management (BM), known as L1-RSRP.

[0005] 2) The object of measurement, i.e., the physical resources of downlink measurement.

[0006] In the configuration information of the RRC parameter CSI-ReportConfig, the reporting configuration is associated with one or more resource sets. Specifically, a measurement resource configuration is associated with one or more Non-Zero Power CSI Reference Signal (NZP-CSI RS) resource sets. The user equipment uses these NZP-CSI RS resource sets to measure the characteristics of the downlink channel. An NZP-CSI RS resource set may include a set of configured CSI-RS or a set of Synchronization Signal Blocks (SSBs). For example, L1-RSRP measurement reporting for beam management is performed on a set of SSBs or a set of NZP-CSI RSs.

[0007] 3) The reporting method, i.e., which uplink physical channel is used to carry CSI reporting.

[0008] In Rel-15NR, CSI reporting for user equipment can be divided into three types: periodic CSI report, semi-persistent CSI report, and aperiodic CSI report.

[0009] For periodic CSI reporting, the network needs to be configured with a specific reporting period. Periodic CSI reporting is carried out through the Physical Uplink Control Channel (PUCCH). Therefore, for periodic CSI reporting, the resource configuration information needs to be configured with the periodic PUCCH resources used for reporting.

[0010] For semi-persistent CSI reporting, the network activates or deactivates the corresponding CSI reporting via MAC CE. Semi-persistent CSI reporting can be carried through the allocated PUCCH or the allocated Physical Uplink Shared Channel (PUSCH). PUSCH is often used to carry semi-persistent CSI reports with larger amounts of information.

[0011] Aperiodic CSI reporting is triggered via downlink control information (DCI). Specifically, it is indicated by the CSI request indication field in the uplink scheduling authorization. This indication field contains a maximum of 6 bits, each combination corresponding to a configured aperiodic CSI report, meaning a maximum of 63 different aperiodic CSI reports can be triggered (all bits set to 0 indicate no aperiodic CSI report is triggered). Aperiodic CSI reports are carried via PUSCH.

[0012] At the 3GPP RAN#94e plenary meeting in December 2021, research on the application of Artificial Intelligence / Machine Learning (AI / ML) in the NR air interface was approved (see Non-Patent Literature 1). The use cases for this research project mainly include the following three aspects:

[0013] 1) Enhancements to CSI reporting, such as reducing CSI reporting overhead, improving CSI reporting accuracy, and enhancing CSI reporting prediction.

[0014] 2) Enhanced beam management, such as beam prediction in the time domain, reduction of overhead and latency in the spatial domain, and improved beam selection accuracy; the UE reports the Layer 1 Reference Signal Received Power (RSRP) to the base station, and the base station performs beam management based on the reported information;

[0015] 3) Positioning accuracy enhancement in different scenarios, such as scenarios with dense non-line of sight (NLOS).

[0016] The research on enhanced beam management includes two aspects: beam management case study one and beam management case study two.

[0017] 1) Beam Management Case 1 (BM-Case 1): Represents beam prediction in the spatial domain. For example, a User Equipment (UE) measures the Reference Signal Received Power (RSRP) of the beam corresponding to a reference signal set (Set B), and reports the beam information and / or L1-RSRP of the beam corresponding to another reference signal set (Set A) to the base station through inference using an AI / ML model. In a typical scenario, Set B can be a subset of Set A.

[0018] 2) Beam Management Case 2 (BM-Case 2): Represents time-domain beam prediction. For example, the User Equipment (UE) measures the RSRP of the beam corresponding to a reference signal set (Set B), and through inference from an AI / ML model, reports to the base station the beam information and / or L1-RSRP of the beam corresponding to another reference signal set (Set A) in a future time instance.

[0019] The present patent provides a method for a user equipment (UE) to determine the priority of a CSI report used for beam management when applying AI / ML in the NR air interface, and a method for a UE to determine whether to report beam management case 2 (BM-Case 2) to the base station.

[0020] Existing technical documents

[0021] Non-patent literature

[0022] Non-patent literature 1: RP-213599, New SI: Study on AI / ML for NR air interface, section 4.1 Summary of the Invention

[0023] To address at least some of the above-mentioned problems, the present invention provides a method performed by a user equipment and a user equipment thereof.

[0024] According to a first aspect of the present invention, a method for determining the priority of CSI reporting, performed by a user equipment, is provided, comprising the steps of: receiving configuration information for Channel State Information (CSI) reporting; and determining the priority of the CSI reporting based at least on the configuration information.

[0025] Preferably, the priority is determined by formula 1 or formula 2.

[0026] Formula 1: Pri iCSI (y, k, c, s) = 2 × N cells ×M s ×y+N cells ×M s ×k+M s ×c+s,

[0027] Formula 2: Pri iCSI (y, k, c, s) = Y × N cells ×M s ×y+N cells ×M s ×k+M s ×c+s,

[0028] Among them, Pri iCSI (y, k, c, s) represents the priority, the Pri iCSI The larger the value of (y, k, c, s), the lower the priority. Y represents a positive integer greater than or equal to 3, N... cells M represents the maximum number of serving cells. sThe maximum number of configuration information received is indicated by c, which represents the index of the serving cell corresponding to the CSI report, s represents the reporting identifier of the CSI report, y is determined according to the reporting method of the CSI report, and k is determined according to the reporting items of the CSI report.

[0029] Preferably, when the reporting method is non-periodic CSI reporting, y = 0; when the reporting method is semi-persistent CSI reporting transmitted on PUSCH, y = 1; when the reporting method is semi-persistent CSI reporting transmitted on PUCCH, y = 2; and when the reporting method is periodic CSI reporting, y = 3.

[0030] Preferably, k = 0 when the reported item contains L1-RSRP, or when the base station configures or indicates through RRC signaling or DCI that the beam management report contains only beam information, and when the reported item contains only beam information; and k = 1 when the reported item does not contain L1-RSRP, and the base station does not configure or indicate through RRC signaling or DCI that the beam management report contains only beam information.

[0031] Preferably, k = 0 when the reported item includes L1-RSRP and the configuration information includes at least one configuration information related to AI / ML; or when the base station configures or indicates through RRC signaling or DCI that the beam management report only contains beam information; and when the reported item only contains beam information. Furthermore, k = 1 when the reported item includes L1-RSRP and the configuration information does not include configuration information related to AI / ML; and k = 2 when the reported item does not include L1-RSRP and the base station does not configure or indicate through RRC signaling or DCI that the beam management report only contains beam information.

[0032] In addition, according to the present invention, a user equipment is provided, comprising: a processor; and a memory storing instructions, wherein the instructions, when executed by the processor, perform the method described above.

[0033] Invention Effects

[0034] When applying artificial intelligence / machine learning (AI / ML) technologies in the NR air interface, for model inference on the user equipment side, when the beam management report only contains beam-related information, this invention provides a method for the user equipment (UE) to determine the priority of the beam management report. This method ensures that CSI reports carrying beam management information in AI / ML have a higher priority than CSI reports without beam management information, allowing the UE to prioritize and report CSI reports with beam management information, effectively improving the accuracy and reliability of the base station's selection of downlink transmission beams. Simultaneously, this invention also provides a method for the UE to determine whether to report beam management in Case 2 (BM-Case 2). This method allows the UE to still report CSI reports for beam management to the base station even when the number of received CSI-RS resources (i.e., the number of actually measured CSI-RS) is less than the number of reference signals required for model inference, thus also effectively improving the accuracy and reliability of the base station's selection of downlink transmission beams. Attached Figure Description

[0035] The above and other features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein:

[0036] Figure 1 is a schematic diagram illustrating the basic process of the method performed by the user equipment in Embodiments 1 and 2 of the invention.

[0037] Figure 2 is a schematic diagram illustrating the basic process of the method performed by the user equipment in embodiments three and four of the invention.

[0038] Figure 3 is a block diagram illustrating a user equipment according to an embodiment of the present invention. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below. Furthermore, for the sake of simplicity, detailed descriptions of well-known technologies not directly related to the present invention have been omitted to prevent confusion in understanding the present invention.

[0040] The following description uses 5G mobile communication systems and their subsequent evolutions as example application environments to specifically describe several embodiments according to the present invention. However, it should be noted that the present invention is not limited to the following embodiments, but is applicable to many other wireless communication systems, such as communication systems after 5G and 4G mobile communication systems before 5G.

[0041] The following describes some of the terms involved in this invention. Unless otherwise specified, the terms used in this invention are as defined herein. The terms given in this invention may be named differently in LTE, LTE-Advanced, LTE-Advanced Pro, NR and later communication systems, but a unified terminology is used in this invention. When applied to a specific system, it can be replaced with the terminology used in the corresponding system.

[0042] 3GPP: 3rd Generation Partnership Project

[0043] LTE: Long Term Evolution

[0044] NR: New Radio, New Wireless, New Air Interface

[0045] PDCCH: Physical Downlink Control Channel

[0046] DCI: Downlink Control Information

[0047] PDSCH: Physical Downlink Shared Channel

[0048] UE: User Equipment

[0049] eNB: evolved NodeB

[0050] gNB: NR base station

[0051] TTI: Transmission Time Interval

[0052] OFDM: Orthogonal Frequency Division Multiplexing

[0053] CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing

[0054] C-RNTI: Cell Radio Network Temporary Identifier

[0055] CSI: Channel State Information

[0056] HARQ: Hybrid Automatic Repeat Request.

[0057] CSI-RS: Channel State Information Reference Signal

[0058] CRS: Cell Reference Signal

[0059] PUCCH: Physical Uplink Control Channel

[0060] PUSCH: Physical Uplink Shared Channel

[0061] UL-SCH: Uplink Shared Channel

[0062] CG: Configured Grant, Configuration Scheduling License

[0063] MCS: Modulation and Coding Scheme

[0064] RB: Resource Block

[0065] RE: Resource Element

[0066] CRB: Common Resource Block

[0067] CP: Cyclic Prefix

[0068] PRB: Physical Resource Block

[0069] FDM: Frequency Division Multiplexing

[0070] RRC: Radio Resource Control

[0071] RSRP: Reference Signal Receiving Power

[0072] SRS: Sounding Reference Signal

[0073] DMRS: Demodulation Reference Signal

[0074] CRC: Cyclic Redundancy Check

[0075] SFI: Slot Format Indication

[0076] TDD: Time Division Duplexing

[0077] FDD: Frequency Division Duplexing

[0078] SIB: System Information Block

[0079] SIB1: System Information Block Type 1

[0080] PCI: Physical Cell ID

[0081] PSS: Primary Synchronization Signal

[0082] SSS: Secondary Synchronization Signal

[0083] BWP: Bandwidth Part

[0084] SFN: System Frame Number

[0085] IE: Information Element

[0086] SSB: Synchronization Signal Block

[0087] EN-DC: EUTRA-NR Dual Connection, LTE-NR Dual Connectivity

[0088] MCG: Master Cell Group

[0089] SCG: Secondary Cell Group

[0090] PCell: Primary Cell

[0091] SCell: Secondary Cell

[0092] SPS: Semi-Persistant Scheduling

[0093] TA: Timing Advance, uplink timing advance

[0094] PT-RS: Phase-Tracking Reference Signals

[0095] TB: Transport Block

[0096] CB: Code Block

[0097] QPSK: Quadrature Phase Shift Keying

[0098] 16 / 64 / 256QAM: 16 / 64 / 256 Quadrature Amplitude Modulation.

[0099] TDRA (field): Time Domain Resource Assignment.

[0100] FDRA (field): Frequency Domain Resource Assignment.

[0101] ARFCN: Absolute Radio Frequency Channel Number

[0102] SC-FDMA: Single Carrier-Frequency Division Multiple Access

[0103] MAC: Medium Access Control.

[0104] PDU: Protocol Data Unit

[0105] TBS: Transport Block Size

[0106] CQI: Channel Quality Indicator

[0107] RI: Rank Indicator

[0108] PMI: Precoder Matrix Indicator

[0109] RRM: Radio Resource Management

[0110] BM: Beam Management

[0111] NZP-CSI RS: Non-Zero Power CSI Reference Signal.

[0112] MAC CE: Medium Access Control Element.

[0113] CRI: CSI-RS Resource Indicator

[0114] SSBRI: SSB Resource Indicator

[0115] DRX: Discontinuous Reception

[0116] The following is a description of prior art associated with the present invention. Unless otherwise specified, the same terms in the specific embodiments have the same meaning as in the prior art.

[0117] In this specification, "network" refers to a base station.

[0118] In this specification, the use of artificial intelligence / machine learning (AI / ML) models can also be referred to as the use of enhanced CSI (or, reporting).

[0119] The parameter set (numerology) and time slot in NR

[0120] The parameter set numberology includes two aspects: subcarrier spacing and cyclic prefix (CP) length. NR supports five subcarrier spacings: 15kHz, 30kHz, 60kHz, 120kHz, and 240kHz (corresponding to μ = 0, 1, 2, 3, and 4). Table 4.2-1 shows the supported transmission parameter set, as detailed below.

[0121] Table 4.2-1 NR Supported Subcarrier Spacing

[0122] Extended CP is supported only when μ = 2, i.e., a 60kHz subcarrier spacing; other subcarrier spacings only support normal CP. For normal CP, each slot contains 14 OFDM symbols; for extended CP, each slot contains 12 OFDM symbols. For μ = 0 (15kHz subcarrier spacing), one slot = 1ms; for μ = 1 (30kHz subcarrier spacing), one slot = 0.5ms; for μ = 2 (60kHz subcarrier spacing), one slot = 0.25ms, and so on.

[0123] NR and LTE use the same definition for subframes, which is 1ms. For a subcarrier spacing configuration μ, the slot number within one subframe (1ms) can be represented as... The range is 0 to The slot number within a system frame (10ms in duration) can be represented as: The range is 0 to in, and The definitions for different subcarrier spacings μ are shown in the table below.

[0124] Table 4.3.2-1: Number of symbols per slot, number of slots per system frame, and number of slots per subframe during normal CP.

[0125] Table 4.3.2-2: Number of symbols per slot, number of slots per system frame, and number of slots per subframe during extended CP (60kHz)

[0126] On NR carriers, the system frame (or simply frame) number SFN ranges from 0 to 1023.

[0127] Resource blocks (RBs) and resource units (REs)

[0128] Resource blocks (RBs) are defined in the frequency domain as For consecutive subcarriers, for example, with a subcarrier spacing of 15 kHz, RB is 180 kHz in the frequency domain. For a subcarrier spacing of 15 kHz × 2 μ Resource element (RE) represents one subcarrier in the frequency domain and one OFDM symbol in the time domain.

[0129] Common Resource Block (CRB)

[0130] The Common Resource Block (CRB) is defined for a parameter set numberology. For all numbersology, the center frequency of subcarrier 0 of CRB number 0 points to the same location in the frequency domain, which is called "point A".

[0131] Bandwidth Frame (BWP)

[0132] In NR, one or more bandwidth segments can be defined for each parameter set numberology. Each BWP contains one or more consecutive CRBs. Assuming a BWP is numbered i, its starting point... (or, use) (to represent) and length (or, use) (to represent) must simultaneously satisfy the following relations:

[0133] That is, the CRB contained in the BWP must be located within the resource raster of the corresponding numberology. The CRB number represents the distance from the lowest-numbered CRB of the BWP to point A, in units of RB.

[0134] The resource blocks within a BWP are called physical resource blocks (PRBs), and their numbering is... Physical resource block 0 corresponds to the lowest numbered CRB of the corresponding BWP, i.e., CRB For a given serving cell, the gNB configures a BWP using the following high-level parameters:

[0135] 1) Subcarrier spacing;

[0136] 2) CP length;

[0137] 3) The high-level parameter locationAndBandwidth indicates the BWP relative to the starting CRB of the resource raster. offset value offset(RB) start ) and the number L of consecutive CRBs in the frequency domain of the BWP RB ,satisfy Among them O carrier This represents `offsetToCarrier`; where the parameter `locationAndBandwidth` indicates a `RIV` (Resource Indication Value). The `RIV` is related to `L`. RB and RB start The calculation relationship is as follows: If So otherwise, in, and,

[0138] 4) The serial number of the BWP;

[0139] 5) Configuration of BWP common and BWP proprietary parameters, such as the configuration of PDCCH and PDSCH for downlink BWP.

[0140] Channel State Information (CSI) Reporting in NR

[0141] In NR, user equipment can perform different downlink channel measurements and channel state information reports (CSI reports) based on network configuration information. The measurement configuration and the corresponding reporting method are accomplished through the reporting configuration, which is represented by the RRC parameter CSI-ReportConfig in the 3GPP protocol.

[0142] CSI reported physical measurement resources

[0143] In the configuration information of the RRC parameter CSI-ReportConfig, the reporting configuration is associated with one or more resource sets. Specifically, a measurement resource configuration is associated with one or more Non-Zero Power CSI Reference Signal (NZP-CSIRS) resource sets. The user equipment uses this NZP-CSI RS resource set to measure the characteristics of the downlink channel. The NZP-CSI RS resource set may include a set of configured CSI-RS or a set of Synchronization Signal Blocks (SSBs). For example, L1-RSRP measurement reporting for beam management is performed on a set of SSBs or a set of NZP-CSI RS. For a configured set of NZP-CSI RS resources, a CSI-RS Resource Identifier (CRI) is used to represent a specific CSI-RS resource within that set. For example, if the group contains four CSI-RS resources, then the CRI is two bits: '00' represents the first CSI-RS resource, '01' represents the second CSI-RS resource, '10' represents the third CSI-RS resource, and '11' represents the fourth CSI-RS resource. Similarly, for a configured group of SSB resources, an SSB Resource Identifier (SSBRI) is used to represent a specific SSB resource within that group.

[0144] CSI Report Items

[0145] A measurement report needs to explicitly configure which measurement items the user equipment (UE) needs to report. For example, a measurement report may include three items: Channel Quality Indicator (CQI), Rank Indicator (RI), and Precoder Matrix Indicator (PMI), collectively referred to as channel state information. A measurement report can also include only one item, such as reporting received signal strength, called Reference Signal Received Power (RSRP). RSRP is also a critical measurement, generally used in higher-level Radio Resource Management (RRM). NR introduces RSRP reporting at the physical layer for Beam Management (BM), called L1-RSRP. For L1-RSRP reporting, UE can report the largest L1-RSRP measurement value; the remaining L1-RSRP values ​​are reported differentially, meaning the remaining reported L1-RSRP values ​​are the differences between the measured values ​​and the largest L1-RSRP measurement value. It is worth noting that when AI / ML models or technologies are applied in the NR air interface, the reports used for beam management may not include L1-RSRP. That is, the report may only include relevant information about the beam (e.g., CRI / SSBRI), or it may include both relevant information about the beam and the L1-RSRP corresponding to each beam.

[0146] CSI reporting method

[0147] In NR, CSI reporting by user equipment can be divided into three types: periodic CSI report, semi-persistent CSI report, and aperiodic CSI report.

[0148] For periodic CSI reporting, the network needs to be configured with a specific reporting period. Periodic CSI reporting is carried out through the Physical Uplink Control Channel (PUCCH). Therefore, for periodic CSI reporting, the resource configuration information needs to be configured with the periodic PUCCH resources used for reporting.

[0149] For semi-persistent CSI reporting, the network activates or deactivates the corresponding CSI reporting via MAC CE. Semi-persistent CSI reporting can be carried through allocated PUCCHs or allocated Physical Uplink Shared Channels (PUSCHs). PUCCH resources are semi-statically and periodically configured. PUSCHs are often used to carry semi-persistent CSI reports with relatively large amounts of information.

[0150] Aperiodic CSI reporting is triggered via downlink control information (DCI). Specifically, it is indicated by the CSI request indication field in the uplink scheduling authorization. This indication field contains a maximum of 6 bits, each combination corresponding to a configured aperiodic CSI report, meaning a maximum of 63 different aperiodic CSI reports can be triggered (all bits set to 0 indicate no aperiodic CSI report is triggered). Aperiodic CSI reports are carried via PUSCH.

[0151] Artificial Intelligence / Machine Learning (AI / ML)

[0152] In the specification of this invention, an AI / ML model is used to represent the application of AI / ML technology in the NR air interface.

[0153] AI / ML technology can be divided into the following 5 aspects:

[0154] 1) AI / ML model training

[0155] The training of AI / ML models involves generating an inference relation (e.g., a function) based on a combination of input and output parameters, which is then used for subsequent inference. Taking a CSI generation model as an example, this model can be trained by a network or by a user device (UE). The input parameters of this model are the raw channel data (e.g., the original channel matrix), and the output parameter is the CSI reported to the network. Conversely, a CSI reconstruction model can also be trained by a network or by a UE. The input parameters of the CSI reconstruction model are the reported CSI, and the output parameter is the raw channel data.

[0156] 2) AI / ML model transfer

[0157] If the CSI generation model is trained by a network, the trained CSI generation model can be sent by the network to the UE for model inference. The sending of the model is called AI / ML model transfer.

[0158] 3) AI / ML model inference

[0159] Taking the CSI generation model as an example, the process by which the UE uses a CSI generation model to generate CSI reports is the inference process of the AI / ML model. Similarly, the process by which the network uses a CSI reconstruction model to generate raw channel data is also the inference process of the AI / ML model.

[0160] 4) AI / ML model monitoring

[0161] The network or UE needs to monitor the AI / ML model used to determine whether the model is suitable for the current channel conditions.

[0162] 5) AI / ML model update

[0163] When the network or UE deems the model no longer applicable, the AI / ML model will be updated.

[0164] Beam Management (BM) Report

[0165] In enhanced beam management scenarios, when the UE applies an AI / ML model, it can be used to generate reported beam measurement information. For example, when the model input is a Layer 1-RSRP (L1-RSRP) measured by a CSI-RS, the model output can be the L1-RSRP corresponding to a CSI-RS (corresponding to a downlink beam) that has not been measured (actually). In this specification, the model output is referred to as the predicted L1-RSRP. The network can configure two sets of reference signals for the UE. These two sets can be different, one for beam measurement (referred to as Set B), and the other representing the beams to be reported (referred to as Set A).

[0166] Enhancements to beam management include Beam Management Case Study 1 and Beam Management Case Study 2:

[0167] 1) Beam Management Case 1 (BM-Case 1): Represents beam prediction in the spatial domain. For example, a User Equipment (UE) measures the L1-RSRP of the beam corresponding to a reference signal set (Set B), and reports the beam information and / or L1-RSRP of the beam corresponding to another reference signal set (Set A) to the base station through inference from an AI / ML model. In a typical scenario, Set B can be a subset of Set A.

[0168] 2) Beam Management Case 2 (BM-Case 2): Represents time-domain beam prediction. For example, a User Equipment (UE) measures the L1-RSRP of the beam corresponding to a reference signal set (Set B). Through inference using an AI / ML model, it reports to the base station the beam information and / or L1-RSRP of the beam corresponding to another reference signal set (Set A) at a future time instance. In BM-Case 2, the UE can measure the reference signals in the reference signal set at multiple times within an observation (or measurement) window, using these measurements for AI / ML model inference, i.e., as input parameters to the AI / ML model.

[0169] Time instance in beam management report

[0170] A beam management report may include CSI-RS Resource Identifier (CRI), SSB Resource Identifier, and L1-RSRP. Unlike traditional beam management reports, when artificial intelligence / machine learning (AI / ML) technologies are applied in the NR air interface, for UE-side model inference, the beam management report may include one or more (denoted by N) CRIs / SSBRIs corresponding to future times, and / or L1-RSRPs. These future times are also called (future) time instances. The number of time instances N can be configured via the RRC parameter. Specifically, one time instance corresponds to one or more CRIs / SSBRIs, and / or the corresponding predicted L1-RSRP.

[0171] CSI reporting priority

[0172] In NR, the User Equipment (UE) needs to determine the priority value for each CSI report. A higher priority value indicates a lower priority for the CSI report; a lower priority value indicates a higher priority for the CSI report.

[0173] CSI Reference Resource

[0174] The CSI reference resource for a serving cell is defined as follows:

[0175] 1) For frequency domain resources, the CSI reference resource represents the derived set of CSI-related downlink PRBs;

[0176] 2) For time-domain resources, assuming CSI reporting is performed in uplink time slot n', then the time-domain resource of the CSI reference resource is a downlink time slot, denoted as nn. CSI_ref ,in, μ DL and μ UL These represent the configuration of the downlink and uplink subcarrier spacing, respectively.

[0177] In Rel-15NR for n CSI_ref The definition is (taking non-periodic CSI reporting as an example):

[0178] ■ For aperiodic CSI reporting, if the CSI request field in the DCI indicates that the CSI reporting and CSI request are in the same time slot, then n CSI_ref The value of n ensures that the CSI reference resource and the corresponding CSI request are in the same valid downlink slot. Otherwise, n CSI_ref The value of is not less than the minimum delay requirement (in time slots), and satisfies nn CSI_ref This corresponds to a valid downlink time slot.

[0179] Valid downlink slot

[0180] In a serving cell, a time slot is considered a valid downlink time slot if it meets the following two conditions.

[0181] 1) The time slot contains at least one downlink symbol configured by a higher layer, or a flexible symbol;

[0182] 2) For the UE, this time slot will not fall within the measurement gap range.

[0183] Discontinuous reception (DRX)

[0184] Discontinuous reception DRX means that the UE listens to the PDCCH sent by the base station during a discontinuous period, which is called the active time. The UE does not need to listen to the PDCCH during the inactive time, which can reduce power consumption to some extent and achieve power saving. In NR, the base station enables or disables discontinuous reception DRX through RRC signaling.

[0185] The following provides a detailed description of specific examples and embodiments related to this invention. Furthermore, as described above, the examples and embodiments described in this disclosure are illustrative and intended to facilitate understanding of the invention, and are not intended to limit the scope of the invention.

[0186] [Example 1]

[0187] Figure 1 is a schematic diagram illustrating the basic process of a method executed by a user equipment according to Embodiment 1 of the present invention.

[0188] The method executed by the user equipment in Embodiment 1 of the present invention will now be described in detail with reference to the basic process diagram shown in Figure 1.

[0189] As shown in Figure 1, in Embodiment 1 of the present invention, the steps performed by the user equipment include:

[0190] In step S101, the user equipment receives the configuration information CSI-ReportConfig reported by the Channel Status Information (CSI).

[0191] The CSI-ReportConfig indicates the reporting method of the CSI report, namely, the CSI report is a periodic CSI report, or a semi-persistent CSI report transmitted on the Physical Uplink Shared Channel (PUSCH), or a semi-persistent CSI report transmitted on the Physical Uplink Control Channel (PUCCH), or a non-periodic CSI report.

[0192] Furthermore, the CSI-ReportConfig indicates the reporting items of the CSI report. Optionally, the CSI report may or may not include L1-RSRP reports.

[0193] In step S102, the user equipment determines the priority of the CSI report.

[0194] Optionally, the user equipment determines the priority value of the CSI report using a Priority parameter. icSI (y, k, c, s) can be used to represent this.

[0195] in,

[0196] ■ The y is determined according to the reporting method of the CSI.

[0197] Optionally,

[0198] • When the reporting method is non-periodic CSI reporting,

[0199] y = 0;

[0200] • When the reporting method is semi-persistent CSI reporting transmitted over the PUSCH,

[0201] y = 1;

[0202] • When the reporting method is semi-persistent CSI reporting transmitted over PUCCH,

[0203] y = 2;

[0204] • When the reporting method is periodic CSI reporting,

[0205] y = 3.

[0206] ■ The k is determined based on the reported items submitted by the CSI.

[0207] Optionally,

[0208] • When the reported item contains (or carries) L1-RSRP,

[0209] or,

[0210] • When the base station configures or instructs the beam management report to contain only beam information via RRC signaling or DCI, and / or when the reported item contains only (or carries) beam information (CRI / SSBRI),

[0211] k = 0.

[0212] Optionally,

[0213] • When the reported item does not contain (or does not carry) L1-RSRP, and / or the base station has not configured it via RRC signaling or the DCI indicates that the beam management report only contains beam information,

[0214] k = 1.

[0215] ■ The 'c' here represents the index of the serving cell.

[0216] ■ The s represents the reporting identifier CSI-ReportConfigId corresponding to the CSI report.

[0217] Optionally, Pri iCSI (y, k, c, s) = 2 × N cells ×M s ×y+N cells ×M s ×k+M s ×c+s.

[0218] in,

[0219] ■N cells This represents the maximum number of serving cells, maxNrofServingCells.

[0220] ■M s This indicates the maximum number of CSI-reported configurations, maxNrofCSI-ReportConfigurations.

[0221] [Example 2]

[0222] In Embodiment 2 of the present invention, the steps performed by the user equipment include:

[0223] In step S101, the user equipment receives the configuration information CSI-ReportConfig reported by the Channel Status Information (CSI).

[0224] The CSI-ReportConfig indicates the reporting method of the CSI report, namely, the CSI report is a periodic CSI report, or a semi-persistent CSI report transmitted on the Physical Uplink Shared Channel (PUSCH), or a semi-persistent CSI report transmitted on the Physical Uplink Control Channel (PUCCH), or a non-periodic CSI report.

[0225] Furthermore, the CSI-ReportConfig indicates the reporting items of the CSI report. Optionally, the CSI report may or may not include L1-RSRP reports.

[0226] In step S102, the user equipment determines the priority of the CSI report.

[0227] Optionally, the user equipment determines the priority value of the CSI report using a Priority parameter. iCSI (y, k, c, s) can be used to represent this.

[0228] in,

[0229] ■ The y is determined according to the reporting method of the CSI.

[0230] Optionally,

[0231] • When the reporting method is non-periodic CSI reporting,

[0232] y = 0;

[0233] • When the reporting method is semi-persistent CSI reporting transmitted over the PUSCH,

[0234] y = 1;

[0235] • When the reporting method is semi-persistent CSI reporting transmitted over PUCCH,

[0236] y = 2;

[0237] • When the reporting method is periodic CSI reporting,

[0238] y = 3.

[0239] ■ The k is determined based on the reported items submitted by the CSI.

[0240] Optionally,

[0241] • When the reported item includes (or carries) L1-RSRP, and the CSI-ReportConfig contains at least one AI / ML-related configuration information (including but not limited to relevant parameters of the AI / ML model, or, if a reference signal set for measurement is configured, a reference signal set for reporting is configured),

[0242] or,

[0243] • When the base station configures or instructs the beam management report to contain only beam information via RRC signaling or DCI, and / or when the reported item contains only (or carries) beam information (CRI / SSBRI),

[0244] k = 0.

[0245] Optionally,

[0246] • When the reported project includes (or carries) L1-RSRP, and the CSI-ReportConfig does not contain AI / ML related configuration information,

[0247] k = 1.

[0248] Optionally,

[0249] • When the reported item does not contain (or does not carry) L1-RSRP, and / or the base station has not configured it via RRC signaling or the DCI indicates that the beam management report only contains beam information,

[0250] k = 2.

[0251] ■ The 'c' here represents the index of the serving cell.

[0252] ■ The s represents the reporting identifier CSI-ReportConfigId corresponding to the CSI report.

[0253] Optionally, Pri iCSI (y, k, c, s) = Y × N cells ×M s ×y+N cells ×M s ×k+M s ×c+s.

[0254] in,

[0255] ■Y represents a positive integer greater than or equal to 3, or Y = 3.

[0256] ■N cells This represents the maximum number of serving cells, maxNrofServingCells.

[0257] ■M s This indicates the maximum number of CSI-reported configurations, maxNrofCSI-ReportConfigurations.

[0258] [Example 3]

[0259] Figure 2 is a schematic diagram illustrating the basic process of the method executed by a user equipment according to Embodiment 3 of the present invention.

[0260] The method executed by the user equipment in Embodiment 3 of the present invention will now be described in detail with reference to the basic process diagram shown in Figure 2.

[0261] As shown in Figure 2, in Embodiment 3 of the present invention, the steps performed by the user equipment include:

[0262] In step S201, the user equipment receives the configuration information CSI-ReportConfig reported by the Channel Status Information (CSI).

[0263] Optionally, the CSI-ReportConfig is an RRC configuration message sent by the base station, or a reconfiguration message.

[0264] Optionally, the CSI-ReportConfig instructs CSI reports to be used for beam management.

[0265] In step S202, the user equipment reports or discards the CSI report.

[0266] Optionally, after the CSI-ReportConfig is configured or reconfigured, the user equipment will only report the CSI report containing the beam information corresponding to the future time instance and / or the corresponding L1-RSRP when at least one of the following conditions or all of the following conditions are met.

[0267] ■Condition 1: The UE received (measured) at least N BMCase2 One (continuous) CSI-RS transmission occasion for channel measurement.

[0268] ■Condition 2: The UE receives (measures) at least N data within the observation / measurement window. BMCase2 One (continuous) CSI-RS transmission opportunity for channel measurement.

[0269] ■Condition 3: The received (measured) time domain is prior to the CSI reference resource.

[0270] The N BMCase2 Configured by RRC signaling, or indicated by DCI.

[0271] The duration of the observation (measurement) window is configured by RRC signaling, or indicated by DCI, or depends on the specific implementation of the user equipment.

[0272] Optionally, (if one or more of the conditions one to three are not met, i.e., the user equipment does not report the CSI report containing the beam information and / or the corresponding L1-RSRP for the future time instance), the user equipment will only report the CSI report containing the beam information and / or the corresponding L1-RSRP if at least one of the following conditions is met or all of the following conditions are met simultaneously.

[0273] ■Condition 1: The UE has received (measured) at least one CSI-RS transmission opportunity for channel measurement.

[0274] ■Condition 2: The received (measured) time domain is prior to the CSI reference resource.

[0275] Optionally, the time instance corresponding to the CSI report is the time slot where the CSI reference resource is located, or the time instance corresponding to the CSI report is a historical (past) time instance.

[0276] Optionally, (if one or more of the conditions one to two are not met, i.e., the user equipment does not report the CSI report containing beam information and / or the corresponding L1-RSRP, otherwise), the user equipment drops the CSI report.

[0277] [Example 4]

[0278] In Embodiment 4 of the present invention, the steps performed by the user equipment include:

[0279] In step S201, the user equipment receives the configuration information CSI-ReportConfig reported by the Channel Status Information (CSI).

[0280] Optionally, the CSI-ReportConfig instructs CSI reports to be used for beam management.

[0281] In step S202, the user equipment reports or discards the CSI report.

[0282] Optionally, when the base station is configured with discontinuous reception DRX, the user equipment shall report the CSI report containing the beam information corresponding to the future time instance and / or the corresponding L1-RSRP only when at least one of the following conditions is met or all of the following conditions are met simultaneously.

[0283] ■Condition 1: The UE receives (measures) at least N during the active time of the DRX. BMCase2 One (continuous) CSI-RS transmission occasion for channel measurement.

[0284] ■Condition 2: The UE, during the active period of the DRX, simultaneously receives (measures) at least N data within the observation / measurement window. BMCase2 One (continuous) CSI-RS transmission opportunity for channel measurement.

[0285] ■Condition 3: The received (measured) time domain is prior to the CSI reference resource.

[0286] The N BMCase2 Configured by RRC signaling, or indicated by DCI.

[0287] The duration of the observation (measurement) window is configured by RRC signaling, or indicated by DCI, or depends on the specific implementation of the user equipment.

[0288] Optionally, (if one or more of the conditions one to three are not met, i.e., the user equipment does not report the CSI report containing the beam information and / or the corresponding L1-RSRP for the future time instance), the user equipment will only report the CSI report containing the beam information and / or the corresponding L1-RSRP if at least one of the following conditions is met or all of the following conditions are met simultaneously.

[0289] ■Condition 1: The UE received (measured) at least one CSI-RS transmission opportunity for channel measurement during the active period of the DRX.

[0290] ■Condition 2: The received (measured) time domain is prior to the CSI reference resource.

[0291] Optionally, the time instance corresponding to the CSI report is the time slot where the CSI reference resource is located, or the time instance corresponding to the CSI report is a historical (past) time instance.

[0292] Optionally, (if one or more of the conditions one to two are not met, i.e., the user equipment does not report the CSI report containing beam information and / or the corresponding L1-RSRP, otherwise), the user equipment drops the CSI report.

[0293] Figure 3 is a block diagram illustrating the user equipment (UE) according to the present invention. As shown in Figure 3, the UE 20 includes a processor 201 and a memory 202. The processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 202 may include, for example, volatile memory (such as random access memory, RAM), a hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory. Program instructions are stored on the memory 202. When executed by the processor 801, these instructions can perform the methods described in detail in this invention, which are executed by the user equipment.

[0294] The method and related apparatus of the present invention have been described above in conjunction with preferred embodiments. Those skilled in the art will understand that the methods shown above are merely exemplary, and the various embodiments described above can be combined with each other without contradiction. The method of the present invention is not limited to the steps and sequence shown above. The network nodes and user equipment shown above may include more modules, such as modules that can be developed or will be developed in the future for use with base stations, MMEs, or UEs, etc. The various identifiers shown above are merely exemplary and not limiting, and the present invention is not limited to the specific information elements exemplified by these identifiers. Those skilled in the art can make many variations and modifications based on the teachings of the illustrated embodiments.

[0295] It should be understood that the above embodiments of the present invention can be implemented by software, hardware, or a combination of both. For example, the various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), programmable logic devices (CPLDs), and so on.

[0296] In this application, "base station" can refer to a mobile communication data and control switching center with high transmission power and wide coverage, including functions such as resource allocation and scheduling, and data reception and transmission. "User equipment" can refer to user mobile terminals, such as mobile phones, laptops, and other terminal devices that can wirelessly communicate with base stations or micro base stations.

[0297] Furthermore, the embodiments of the present invention disclosed herein can be implemented on a computer program product. More specifically, the computer program product is one that has a computer-readable medium on which computer program logic is encoded, which, when executed on a computing device, provides related operations to implement the above-described technical solutions of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. This configuration of the present invention is typically provided as software, code, and / or other data structures disposed or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), floppy disk, or hard disk, or other media such as firmware or microcode on one or more ROM, RAM, or PROM chips, or downloadable software images, shared databases, etc., in one or more modules. The software or firmware or such configuration can be installed on a computing device to cause one or more processors in the computing device to execute the technical solutions described in the embodiments of the present invention.

[0298] Furthermore, each functional module or feature of the base station equipment and terminal equipment used in each of the above embodiments can be implemented or executed by circuitry, which is typically one or more integrated circuits. Circuitry designed to perform the various functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs) or general-purpose integrated circuits, field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The aforementioned general-purpose processor or each circuit may be configured by digital circuitry or by logic circuitry. Furthermore, when advancements in semiconductor technology lead to advanced technologies that can replace current integrated circuits, the present invention may also utilize integrated circuits obtained using such advanced technologies.

[0299] Although the present invention has been illustrated above with reference to preferred embodiments, those skilled in the art will understand that various modifications, substitutions, and alterations can be made to the invention without departing from its spirit and scope. Therefore, the invention should not be limited by the above embodiments, but rather by the appended claims and their equivalents.

Claims

1. A method executed by a user equipment, comprising the following steps: Receive configuration information reported by the Channel Status Information (CSI); as well as The priority of the CSI reporting is determined at least based on the configuration information.

2. The method according to claim 1, wherein, Determining the priority of the CSI reporting includes: The priority is determined using Formula 1. Formula 1: Pri iCSI (y, k, c, s) = 2 × N cells ×M s ×y+N cells ×M s ×k+M s ×c+s, Among them, Pri iCSI (y, k, c, s) represents the priority, the Pri iCSI The larger the value of (y, k, c, s), the lower the priority. cells M represents the maximum number of serving cells. s The maximum number of configuration information received is indicated by c, which represents the index of the serving cell corresponding to the CSI report, s represents the reporting identifier of the CSI report, y is determined according to the reporting method of the CSI report, and k is determined according to the reporting items of the CSI report.

3. The method according to claim 2, wherein, When the base station configures the beam management report to contain only beam information via RRC signaling or DCI indication, and when the reported item contains only beam information, k=0.

4. A user equipment, comprising: processor; as well as Memory, which stores instructions The instructions, when executed by the processor, perform the method according to any one of claims 1-3.

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