Method and apparatus for beam reporting in wireless communication system

Abstract

According to one embodiment of the present specification, a method performed by a terminal in a wireless communication system comprises the steps of: receiving configuration information related to channel state information (CSI); receiving at least one downlink reference signal (DL RS); calculating CSI on the basis of the measurement for the at least one DL RS; and reporting the CSI. The CSI includes a resource indicator associated with each of the one or more groups. The resource indicator relates to simultaneous transmission performed by the terminal based on the spatial filter.

Description

Technical Field

[0001] The present disclosure relates to methods and apparatus for beam reporting in a wireless communication system. Background Art

[0002] In order to provide voice services while ensuring user activities, a mobile communication system has been developed. However, the area of ​​the mobile communication system has been expanded to data services in addition to voice. Due to the current explosive increase in traffic, resource shortages have occurred, so users need higher-speed services. Therefore, a more advanced mobile communication system is needed.

[0003] The requirements for next generation mobile communication systems need to be able to support the accommodation of explosive data traffic, a significant increase in data rates per user, an accommodation of a significant increase in the number of connected devices, very low end-to-end latency, and high energy efficiency. To this end, various technologies have been studied, such as dual connectivity, massive multiple-input multiple-output (MIMO), in-band full-duplex, non-orthogonal multiple access (NOMA), ultra-wideband support, and device networking.

[0004] In Rel-17 MIMO, panel-specific beam reporting has been introduced, which improves the existing beam reporting method. Specifically, the UE capability (set) index corresponding to the UE panel or panel type is reported together, and the UE's UL / DL panel selection can be supported based on the corresponding information. However, the information reported by the existing panel-specific beam reporting is information that does not take into account simultaneous transmission (STxMP) of multiple panels across the UE. Summary of the invention

[0005] Technical issues

[0006] As described above, STxMP is not considered in the information reported through the existing panel-specific beam reporting. It is not possible to determine whether the UE supports STxMP based on the reported information (e.g., CRI, SSBRI).

[0007] In other words, when using the existing beam reporting method, the UE cannot report the beam information (e.g., CRI, SSBRI) supporting STxMP to the base station. Therefore, operations based on the beam information (e.g., CRI, SSBRI) supporting STxMP cannot be supported.

[0008] An object of the present disclosure is to provide a method for reporting simultaneously transmitted beams (e.g., CRI and / or SSBRI) supporting a UE.

[0009] The technical objectives of the present disclosure are not limited to the above-mentioned technical objectives, and those skilled in the art can clearly understand other technical objectives not mentioned from the following description.

[0010] Technical Solution

[0011] According to an embodiment of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system includes: receiving configuration information related to channel state information (CSI), receiving at least one downlink reference signal (DL RS), calculating CSI based on measurements of at least one DL RS, and reporting CSI.

[0012] The configuration information includes information related to group-based beam reporting.

[0013] The CSI includes a resource indicator associated with each of the one or more groups. The resource indicator is associated with simultaneous transmissions by the UE based on a spatial filter.

[0014] The configuration information may include reporting quantities related to the CSI.

[0015] The reporting amount can be set as: i) "cri"-"RSRP (Reference Signal Received Power)", ii) "ssb-Index"-"RSRP", iii) "cri"-"RSRP"-"Index", or iv) "ssb-Index"-"RSRP"-"Index".

[0016] cri can be a CSI-RS resource indicator (CRI), and ssb-Index can be a SS / PBCH block resource indicator (SSBRI).

[0017] Index may be an index of a UE capability value set.

[0018] The maximum number of SRS antenna ports supported may be indicated based on an index of the UE capability value set.

[0019] The resource indicator may include: i) two CRIs, or ii) two SSBRIs.

[0020] The CSI-RS resources and / or SSB resources of each group can be applied to simultaneous transmission.

[0021] The CSI-RS resources and / or SSB resources of each group can be received by the UE simultaneously.

[0022] Simultaneous transmission may be performed based on UE capabilities.

[0023] UE capability may be related to the maximum number of SRS antenna ports supported.

[0024] The CSI may also include an index to a set of UE capability values.

[0025] Based on the information related to the group-based beam reporting, CSI including the first resource indicator or the second resource indicator related to each group may be reported.

[0026] Resources based on the first resource indicator can be simultaneously received by the UEs and applied for simultaneous transmission.

[0027] Resources based on the second resource indicator can be applicable for the simultaneous transmission.

[0028] The information related to group-based beam reporting may represent a first value related to reporting of a first resource indicator or a second value related to reporting of a second resource indicator.

[0029] The resource indicator may be based on two resource indicators. Based on the two resource indicators, one CSI-RS or one SSB may be selected from each of the two CSI resource sets.

[0030] According to another embodiment of the present disclosure, a user equipment (UE) operating in a wireless communication system includes one or more transceivers, one or more processors, and one or more memories, wherein the one or more memories are operably connected to the one or more processors and store instructions, which configure the one or more processors to perform operations based on being executed by the one or more processors.

[0031] The operations include receiving configuration information related to channel state information (CSI), receiving at least one downlink reference signal (DL RS), calculating the CSI based on measurements of the at least one DL RS, and reporting the CSI.

[0032] The configuration information includes information related to group-based beam reporting.

[0033] The CSI includes a resource indicator associated with each of the one or more groups. The resource indicator is associated with simultaneous transmissions by the UE based on a spatial filter.

[0034] An apparatus according to another embodiment of the present disclosure includes: one or more memories, and one or more processors operatively connected to the one or more memories.

[0035] The one or more memories include instructions that, upon execution by the one or more processors, configure the one or more processors to perform operations.

[0036] The operations include receiving configuration information related to channel state information (CSI), receiving at least one downlink reference signal (DL RS), calculating the CSI based on measurements of the at least one DL RS, and reporting the CSI.

[0037] The configuration information includes information related to group-based beam reporting.

[0038] The CSI includes a resource indicator associated with each of the one or more groups. The resource indicator is associated with simultaneous transmissions by the UE based on a spatial filter.

[0039] One or more non-transitory computer-readable media according to another embodiment of the present disclosure stores one or more instructions.

[0040] The one or more instructions executable by the one or more processors configure the one or more processors to perform operations.

[0041] The operations include receiving configuration information related to channel state information (CSI), receiving at least one downlink reference signal (DL RS), calculating the CSI based on measurements of the at least one DL RS, and reporting the CSI.

[0042] The configuration information includes information related to group-based beam reporting.

[0043] The CSI includes a resource indicator associated with each of the one or more groups. The resource indicator is associated with simultaneous transmissions by the UE based on a spatial filter.

[0044] A method performed by a base station in a wireless communication system according to another embodiment of the present disclosure includes: transmitting configuration information related to channel state information (CSI), transmitting at least one downlink reference signal (DL RS), and receiving CSI.

[0045] The configuration information includes information related to group-based beam reporting. The CSI is calculated based on measurements of at least one DL RS by a user equipment (UE).

[0046] The CSI includes information for a resource indicator associated with each of one or more groups. The resource indicator is associated with simultaneous transmission by the UE based on a spatial filter.

[0047] According to another embodiment of the present disclosure, a base station operating in a wireless communication system includes: one or more transceivers, one or more processors, and one or more memories, wherein the one or more memories are operably connected to the one or more processors and store instructions, which configure the one or more processors to perform operations based on being executed by the one or more processors.

[0048] The operations include transmitting configuration information related to channel state information (CSI), transmitting at least one downlink reference signal (DL RS), and receiving CSI.

[0049] The configuration information includes information related to group-based beam reporting. The CSI is calculated based on measurements of at least one DL RS by a user equipment (UE).

[0050] The CSI includes information of a resource indicator associated with each of one or more groups. The resource indicator is associated with simultaneous transmission by the UE based on a spatial filter.

[0051] Beneficial Effects

[0052] According to an embodiment of the present disclosure, a resource indicator related to simultaneous transmission of a UE is reported on the basis of a group-based beam reporting method.

[0053] Since whether the UE supports STxMP can be determined based on the reported resource indicator, UL scheduling / UL transmission based on a beam supporting STxMP can be performed after the reporting operation.

[0054] Since the resource indicator related to the simultaneous transmission of the UE is performed based on the configuration related to the existing group-based beam reporting method, the implementation complexity required to support the reporting of information related to whether STxMP is supported can be minimized.

[0055] Effects that can be obtained by the present disclosure are not limited to the above-described effects, and other technical effects not described above can be clearly understood by ordinary technicians in the field to which the present disclosure belongs according to the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 An example of beamforming using SSB and CSI-RS is illustrated.

[0057] Figure 2 is a flow chart illustrating an example of a DL BM procedure using SSB.

[0058] Figure 3 A signaling process according to an embodiment of the present disclosure is illustrated.

[0059] Figure 4 is a flowchart illustrating a method performed by a user equipment according to an embodiment of the present disclosure.

[0060] Figure 5 is a flowchart illustrating a method performed by a base station according to another embodiment of the present disclosure.

[0061] Figure 6 The configurations of the first device and the second device according to the embodiment of the present disclosure are illustrated. DETAILED DESCRIPTION

[0062] The following will be attached Figure 1The detailed description disclosed above will describe exemplary embodiments of the present disclosure, rather than describing unique embodiments for performing the present disclosure. The following detailed description includes details that provide a complete understanding of the present disclosure. However, those skilled in the art will appreciate that the present disclosure may be performed without these details.

[0063] In some cases, in order to prevent the concepts of the present disclosure from being obscure, known structures and devices may be omitted, or may be illustrated in a block diagram format based on the core functions of each structure and device.

[0064] In the following, downlink (DL) means communication from a base station to a terminal, and uplink (UL) means communication from a terminal to a base station. In the downlink, the transmitter may be part of a base station, and the receiver may be part of a terminal. In the uplink, the transmitter may be part of a terminal, and the receiver may be part of a base station. The base station may be represented as a first communication device, and the terminal may be represented as a second communication device. The base station (BS) may be replaced with terms including a fixed station, a node B, an evolved node B (eNB), a next generation node B (gNB), a base transceiver system (BTS), an access point (AP), a network (5G network), an AI system, a roadside unit (RSU), a vehicle, a robot, an unmanned aerial vehicle (UAV), an AR (augmented reality) device, a VR (virtual reality) device, and the like. In addition, the terminal may be fixed or mobile, and may be replaced by terms including user equipment (UE), mobile station (MS), user terminal (UT), mobile subscriber station (MSS), subscriber station (SS), advanced mobile station (AMS), wireless terminal (WT), machine type communication (MTC) device, machine-to-machine (M2M) device and device-to-device (D2D) device, vehicle, robot, AI module, unmanned aerial vehicle (UAV), AR (augmented reality) device, VR (virtual reality) device, etc.

[0065] Beam Management (BM)

[0066] The BM process, which is a Layer 1 (L1) / Layer 2 (L2) process for acquiring and maintaining a set of base station (e.g., gNB, TRP, etc.) and / or terminal (e.g., UE) beams that can be used for downlink (DL) and uplink (UL) transmission / reception, may include the following processes and terms.

[0067] - Beam measurement: The operation of measuring the characteristics of a beamforming signal received by an eNB or UE.

[0068] -Beam determination: The operation of selecting the transmit (Tx) beam / receive (Rx) beam of the eNB or UE by the eNB or UE.

[0069] - Beam scanning: The operation of covering a spatial area using transmit and / or receive beams for time intervals by a predetermined scheme.

[0070] -Beam reporting: An operation in which the UE reports information of beamformed signals based on beam measurements.

[0071] The BM process may be divided into (1) a DL BM process using a synchronization signal (SS) / physical broadcast channel (PBCH) block or a CSI-RS and (2) a UL BM process using a sounding reference signal (SRS).

[0072] In addition, each BM process may include Tx beam scanning for determining a Tx beam and Rx beam scanning for determining an Rx beam.

[0073] DL BM

[0074] The DL BM process may include (1) transmission of a beamforming DL reference signal (RS) (eg, CSI-RS or SS block (SSB)) by the eNB and (2) beam reporting by the UE.

[0075] Here, the beam report includes a preferred DL RS identifier (ID) and an L1 reference signal received power (RSRP) corresponding to the preferred DL RS identifier (ID).

[0076] The DL RS ID may be a SSB resource indicator (SSBRI) or a CSI-RS resource indicator (CRI).

[0077] Figure 1 An example of beamforming using SSB and CSI-RS is illustrated.

[0078] like Figure 1 As shown, SSB beams and CSI-RS beams can be used for beam management. The measurement metric is L1-RSRP for each resource / block. SSB can be used for coarse beam management, and CSI-RS can be used for fine beam management. SSB can be used for both Tx beam scanning and Rx beam scanning.

[0079] Rx beam scanning using SSB may be performed when the UE changes the Rx beam for the same SSBRI across multiple SSB bursts. Here, one SS burst includes one or more SSBs, and one SS burst set includes one or more SSB bursts.

[0080] Figure 2 is a flow chart illustrating an example of a DL BM procedure using SSB.

[0081] Configuration of beam reporting using SSB is performed during CSI / beam configuration in the RRC connected state (or RRC connected mode).

[0082] - The UE receives a CSI-ResourceConfig IE including a CSI-SSB-ResourceSetList including SSB resources for a BM from the eNB (S210).

[0083] Table 1 shows an example of the CSI-ResourceConfig IE. As shown in Table 1, a BM configuration using SSB is not separately defined, and SSB is configured similarly to a CSI-RS resource.

[0084] [Table 1]

[0085]

[0086] In Table 1, the csi-SSB-ResourceSetList parameter represents a list of SSB resources in a resource set for beam management and reporting. Here, the SSB resource set can be configured as {SSBx1, SSBx2, SSBx3, SSBx4, ...}. For example, the SSB index can be defined as 0 to 63.

[0087] -The UE receives SSB resources from the eNB based on the CSI-SSB-ResourceSetList (S220).

[0088] - When CSI-reportConfig associated with reporting of SSBRI and L1-RSRP is configured, the UE (beam) reports the best SSBRI and L1-RSRP corresponding thereto to the eNB (S230).

[0089] In other words, when reportQuantity of CSI-reportConfig IE is configured as "ssb-Index-RSRP", the UE reports the best SSBRI and L1-RSRP corresponding thereto to the eNB.

[0090] In addition, when CSI-RS resources are configured in the same OFDM symbol as SSB (SS / PBCH block) and "QCL-Type D" is applicable, the UE can assume that the CSI-RS and SSB are quasi-co-located from the perspective of "QCL-Type D".

[0091] Here, QCL TypeD may mean that the antenna port is QCL from the perspective of spatial Rx parameters. When the UE receives multiple DL antenna ports with a QCL TypeD relationship, the same Rx beam may be applied. In addition, the UE does not expect the CSI-RS to be configured in REs that overlap with REs of SSB.

[0092] BM enhancement in NR Rel-16

[0093] The DL / UL beam indication standardized in 3GPP NR Rel-15 has been designed to indicate the beam used for each DL / UL channel / RS resource separately to ensure beam indication flexibility, and the indication method has been designed separately for each channel / RS.

[0094] This design direction ultimately has the following problems: the base station must indicate the beam change for each channel / RS resource to multiple UEs communicating with the base station using a single beam in order to change the serving beam for multiple UEs, which results in large signaling overhead and large beam change delay. With the UL beam change, UL power control related parameters, especially path loss RS (PL RS), must be changed for each UL channel / RS, which also results in signaling overhead / delay problems. In order to compensate for these shortcomings, five features are introduced in Rel-16. The following Table 2 shows these five features.

[0095] [Table 2]

[0096]

[0097]

[0098] In Rel-16, in addition to the above-mentioned enhancements related to beam / PL RS indication, enhancements related to beam reporting are also made. In Rel-15, a mode in which the UE measures / reports L1-RSRP for each beam RS is supported. However, in an environment with high inter-beam interference, it is difficult to ensure that a specific beam RS has good quality as a serving beam simply because the L1-RSRP (i.e., the received strength of a specific beam RS) is high. In other words, the UE may select a beam with high received strength but high beam interference, and report the beam to the base station. To overcome this shortcoming, Rel-16 supports a new beam reporting mode in which the base station configures resources for interference measurement and RS for channel measurement, and the UE measures L1-SINR for channel resources and interference resources based on this, and reports several RSs with high L1-SINR values.

[0099] BM enhancement in NR Rel-17

[0100] As mentioned above, various BM enhancements were made in Rel-16. Specifically, features were created that can significantly reduce the signaling overhead / latency associated with the beam indication method. However, there is still no configuration / indication channel / RS unified beam for UEs operating with a single serving beam.

[0101] Based on this motivation, Rel-17 will standardize the channel / RS unified beam configuration / indication method. In NR, the DL beam is indicated by sending a configuration indicator (TCI), so it is called a unified TCI state. The existing TCI state is configured / indicated separately for each DLRS / channel, but the unified TCI state is characterized by a unified configuration / indication. Basically, the DL unified TCI state indicates that the QCL type-D RS of (some) PDCCH, PDSCH and (some) CSI-RS resources are uniformly applied, and the UL unified TCI state indicates that the spatial relationship RS (and PL RS) of (some) PUCCH, PUSCH and (some) SRS are uniformly applied. For UEs that have established beam correspondence, since the UL spatial relationship and PL RS can also be matched with the DL beam RS in the same way as the Rel-16 default spatial relationship / PLRS feature, the channel / RS to which the unified TCI state is applied can cover both DL channels / RS and UL channels / RS. This is called a joint DL / UL TCI state. That is, the following two modes will be supported.

[0102] -Joint DL / UL TCI configuration / indication mode: The DL RS configured / indicated in the joint TCI state can be applied not only as a QCL type-D RS for the DL channel / RS, but also as a spatial relationship RS (and PLRS) for the UL channel / RS. That is, if an update to the joint TCI state is indicated, the beam RS (or / and PL RS) for the DL channel / RS and the UL channel / RS can be changed together.

[0103] -Separate DL and UL TCI configuration / indication mode: QCL type-D source RS for DL ​​channels / RS is unified and configured / indicated by DL TCI state, and spatial relationship RS (and PL RS) for UL channels / RS is unified and configured / indicated by UL TCI state. DL TCI state and UL TCI state are configured / indicated separately.

[0104] The DL / UL / joint TCI state will be indicated / updated via MAC-CE and / or DCI. More specifically, one or more TCI states (referred to as a TCI state pool) among the multiple TCI states configured by RRC are activated by MAC-CE. If multiple TCI states are activated by MAC-CE, one of the multiple TCI states is indicated by DCI.

[0105] DCI indication will be supported via downlink DCI formats (DCI1-1 / 1-2) that support the TCI field, and will be supported in both cases with and without PDSCH scheduling. In the latter case, since PDSCH scheduling is omitted (similar to the DCI-based semi-persistent scheduling (SPS) release method), UE ACK transmission for the corresponding DCI will be supported.

[0106] Enhancements related to beam reporting will be made in Rel-17. The Rel-17 beam reporting mode will support a mode in which the UE measures / reports the best beam RS for each TRP, targeting a multi-TRP environment. To this end, if the beam measurement RS set / group is divided into two subsets / subgroups and the base station configures them, the UE will select RS for each subset / subgroup and report them together with the quality value of the corresponding RS (L1-RSRP, [L1-SINR]).

[0107] In the present disclosure, " / " means "and", "or" or "and / or" depending on the context.

[0108] In the present disclosure, QCL type-D RS or TCI state (or simply TCI) may mean a spatial parameter, i.e., a QCL reference RS from a beam perspective. The QCL reference RS may be extended and interpreted as a reference RS or source RS for a corresponding parameter or other beam / spatial related parameters.

[0109] In the present disclosure, "beam" may mean a spatial filter determined based on a reference RS or a source RS. The spatial filter may include a spatial domain filter, a spatial domain transmission filter, and a spatial domain reception filter.

[0110] For example, a beam associated with the UL may be referred to as i) a spatial filter (for uplink transmission or for uplink reception), ii) a spatial domain filter (for uplink transmission or for uplink reception), iii) an uplink spatial domain transmit filter, iv) an uplink spatial domain receive filter, v) an uplink transmit spatial filter (UL Tx spatial filter) or vi) an uplink receive spatial filter (UL Rx spatial filter).

[0111] For example, a DL-related beam may be referred to as i) a spatial filter (for downlink transmission or for downlink reception), ii) a spatial domain filter (for downlink transmission or for downlink reception), iii) a downlink spatial domain transmit filter, iv) a downlink spatial domain receive filter, v) a downlink transmit spatial filter (DL Tx spatial filter) or vi) a downlink receive spatial filter (DL Rx spatial filter).

[0112] For example, when beam reciprocity is established, the DL beam and the UL beam may be equivalently referred to as a spatial filter or a spatial domain filter. Specifically, when beam reciprocity is established, a specific UL beam may be the same as a specific DL beam. For example, the UL beam to be used for uplink transmission of the UE may be determined based on the measurement of the DL beam used for the transmission of the base station. For example, the DL beam to be used for downlink transmission of the base station may be determined based on the measurement of the UL beam used for the transmission of the UE.

[0113] In environments such as low frequency bands where analog beamforming is not used, the indication of the QCL type-D RS may be omitted. In this case, the QCL type-D RS in the present disclosure may be interpreted as a QCL reference RS (i.e., when there is only one reference RS in the TCI state, it may refer to the corresponding RS).

[0114] From the UL perspective, the TCI state (or simply TCI) may refer to a state including a reference / source RS for a UL beam. From the UL perspective, the TCI state may indicate a spatial relationship RS (and path loss RS) in the existing Rel-15 / 16. Here, the path loss RS may be configured to be the same as the corresponding RS, or configured to be associated with the UL TCI state, or configured to be included separately.

[0115] In Rel-17 MIMO, the beam reporting method supported in the existing release has been evolved, so a reporting enhancement method has been standardized to support UE uplink (UL) (and downlink (DL)) panel selection by reporting together a UE capability (set) index corresponding to a UE panel or panel type and utilizing the index. Hereinafter, for convenience, this method is referred to as panel-specific beam reporting.

[0116] This method assumes that the UE performs UL transmission using one panel at a time, in order to support rapid changes of the UE panel. The above-mentioned panel-specific beam reporting can be performed based on Table 3. In the following Table 3, the parameter corresponding to the "UE capability (set) index" is referred to as "Capability [Set] Index". However, the parameter "Capability [Set] Index" is named for ease of explanation, and the "UE capability (set) index" may be referred to as another term (e.g., Index).

[0117] For ease of description, the index ("UE capability (set) index") is referred to as "C-ID" hereinafter. The UE may report to the base station how many C-IDs the UE has as a UE capability report.

[0118] Each C-ID indicates the maximum number of SRS ports supported by the UE (the maximum number of SRS antenna ports supported by the UE). That is, the Rel-17 C-ID is defined only for panels with different numbers of SRS ports.

[0119] For example, it can be assumed that a 4-panel UE includes panel #0 (2 ports), panel #1 (2 ports), panel #2 (4 ports), and panel #3 (4 ports). In this example, panel #0 and panel #1 can be mapped to C-ID #0, and panel #2 and panel #3 can be mapped to C-ID #1.

[0120] The UE can report to the base station C-ID#0 with the maximum supported SRS ports = 2 and C-ID#1 with the maximum supported SRS ports = 4. Based on this, the C-ID and the UE capability information related thereto (e.g., the maximum number of SRS ports) can be understood as a report for the type of panel.

[0121] The panel-specific beam reporting in Table 3 below corresponds to an operation of reporting (immediately / periodically) by including the C-ID reported as the UE capability in the beam report.

[0122] If existing beam reporting is configured / indicated, the UE may operate as follows. The UE reports to the base station i) the index of the RS associated with the best N BS Tx beams (i.e., CRI or SSBRI) and ii) the L1-RSRP value or L1-SINR value as the reception quality value of the corresponding RS. In this instance, N RS indices may be selected / reported regardless of the UE Rx panel, where N may be set to a value of 1 to 4 and configured by the base station to the UE.

[0123] If panel-specific beam reporting is configured / indicated, the UE may operate as follows. The UE reports the L1-RSRP / L1-SINR associated with the CRI / SSBRI and the optimal C-ID for each CRI / SSBRI to the base station. For example, for N=4, the UE may report the first two CRIs as C-ID#0 and the remaining two CRIs as C-ID#1. In this example, with respect to the UE panel, the four CRIs reported by the UE may be interpreted as follows.

[0124] The first two CRIs reported as C-ID#0 may mean as follows: If the base station receives (and / or transmits) using one of the beams corresponding to the first two CRIs, 1) the UE may prefer to use the panel corresponding to C-ID#0 (or one of the corresponding panels) for transmission, or 2) using the panel corresponding to C-ID#0 (or one of the corresponding panels) may be more advantageous than using the panel corresponding to another C-ID (i.e., C-ID#1).

[0125] The remaining two CRIs reported as C-ID#1 may mean as follows.

[0126] If the base station receives (and / or transmits) using a beam corresponding to one of the remaining two CRIs, 1) the UE may prefer to use the panel corresponding to C-ID#1 (or one of the corresponding panels) for transmission, or 2) using the panel corresponding to C-ID#1 (or one of the corresponding panels) may be more advantageous than using the panel corresponding to another C-ID (i.e., C-ID#0).

[0127] [Table 3]

[0128]

[0129]

[0130]

[0131] Based on the panel-specific beam report, the base station may change / indicate the best DL beam (eg, DL TCI state) and / or the best UL beam (eg, UL TCI state, spatial relation RS).

[0132] Research on methods to support simultaneous transmission across multiple panels (STxMP) has been initiated in the Rel-18 MIMO work item. The present disclosure provides methods to extend the Rel-17 panel-specific beam reporting to support / consider STxMP.

[0133] The C-ID may preferably be extended to express another UE panel (type) attribute in addition to the maximum number of SRS ports. By doing so, the C-ID may be extended so that different C-IDs may be assigned to panels that support the same maximum number of SRS ports. This is because STxMP may be supported for panels corresponding to the same number of UL ports. In addition, C-ID combinations that can and / or cannot perform STxMP may be reported to the base station. For example, the UE may configure and report C-ID pairs that can and / or cannot perform STxMP. Through the UE's report, the base station may know when the CRI / SSBRI corresponding to which C-IDs is used as the ULTCI (or spatial relationship) that STxMP can (or cannot) be performed.

[0134] In addition to or instead of the above method, a reporting method for STxMP may be defined as follows.

[0135] Method 1

[0136] Based on the reporting configuration of the base station, the UE reports information about CRI / SSBRI (or CRI / SSBRI pairs / groups) that can and / or cannot perform STxMP and information about C-ID (or C-ID pairs / groups) when performing panel-specific beam reporting.

[0137] For example, the base station may request / configure a beam report for a panel capable of STxMP from the UE. Based on this request, the UE may report the index (or pair / group index) of the C-ID (or C-ID pair / group) for which STxMP is capable. In this case, the UE may report the following i) and / or ii) together.

[0138] i) CRI / SSBRI, and / or ii) beam quality value associated with CRI / SSBRI (e.g., L1-RSRP, L1-SINR)

[0139] i) CRI / SSBRI may be the CRI / SSBRI that the UE prefers to apply as UL TCI (or spatial relation RS). That is, CRI / SSBRI may be applied as UL TCI (or spatial relation RS) for a panel based on a C-ID capable of STxMP.

[0140] For another example, the base station may request / configure reporting of information about whether STxMP is capable or not while requesting / configuring beam reporting to the UE. "Whether STxMP is capable or not" may be reported via a separate indicator or implicitly reported as grouping information for CRI / SSBRI and / or C-ID.

[0141] For example, CRI / SSBRI and / or C-ID belonging to the same group / pair / set may indicate that STxMP can be performed, while CRI / SSBRI and / or C-ID not belonging to the same group / pair / set may indicate that STxMP cannot be performed. In contrast to the above example, CRI / SSBRI and / or C-ID belonging to the same group / pair / set may indicate that STxMP cannot be performed, while CRI / SSBRI and / or C-ID not belonging to the same group / pair / set may indicate that STxMP can be performed.

[0142] If N=4 and beam RS type=CSI-RS, the UE may report based on method 1 as in the following examples 1 to 4.

[0143] Example 1) The UE may report information on pairs of four CRIs and two C-IDs as follows.

[0144] {CRI#1(+L1-RSRP / SINR), CRI#3(+L1-RSRP / SINR), C-ID pair #0}

[0145] {CRI#2(+L1-RSRP / SINR),CRI#4(+L1-RSRP / SINR),C-ID pair#1}

[0146] Example 2) The UE may divide four CRIs and four C-IDs into two groups and report them as follows.

[0147] {CRI#1(+L1-RSRP / SINR)+C-ID#0,CRI#3(+L1-RSRP / SINR)+C-ID#1}

[0148] {CRI#2(+L1-RSRP / SINR)+C-ID#2,CRI#4(+L1-RSRP / SINR)+C-ID#3}

[0149] Example 3) The UE may report a CRI pair and a C-ID pair as follows.

[0150] CRI pair #1+C-ID pair #0(+RSRP), CRI pair #2+C-ID #1(+RSRP),…

[0151] In an example, a C-ID pair may refer to a C-ID that is capable of STxMP or incapable of STxMP, or an index may be assigned to the pair individually.

[0152] In Example 2, CRI / C-ID belonging to the same group may mean that STxMP can be performed or that STxMP cannot be performed.

[0153] In Example 3, the CRI pair may be information selected by the UE based on information about multiple CSI-RS resource pairs preset by the base station. For example, the combination of CSI-RS resources belonging to the CRI pair (candidate group) may mean that the base station can use the Rx beam corresponding to the CSI-RS resource to "simultaneously" receive the combination of beam RSs of various UE Tx beams. Depending on the base station implementation, the CRI pair may correspond to a combination of beams transmitted from different TRPs or different panels of the same TRP.

[0154] For reference, the beam reporting method supported by the existing 3GPP NR standard is divided into a group-based beam reporting method and a non-group-based beam reporting method as shown below. In Rel-17, a method (groupBasedBeamReporting-r17) that evolves the group-based beam reporting method considering the simultaneous transmission of MTRP has been introduced.

[0155] Specifically, two CSI resource sets can be configured to the resource setting. Each CSI resource set can be regarded as a set of beam RSs sent in each TRP. For example, the UE can receive information (e.g., CSI-AssociatedReportConfigInfo) including a first resource set and a second resource set. Each resource set can be related to a CSI-RS or an SSB. For example, resourcesForChannel in CSI-AssociatedReportConfigInfo can correspond to the first resource set, and resourcesForChannel2 in CSI-AssociatedReportConfigInfo can correspond to the second resource set. Specifically, the first resource set (e.g., resourceSet or csi-SSB-ResourceSet) can be configured based on resourcesForChannel, and the second resource set (e.g., resourceSet2 or csi-SSB-ResourceSet2) can be configured based on resourcesForChannel2.

[0156] A UE configured / instructed to report selects one resource (i.e., CRI or SSBRI) from each CSI resource set and reports resource pair information on a group basis. That is, resource pairs belonging to the same group may correspond to beam pairs supporting simultaneous reception (and / or simultaneous transmission).

[0157] Method 1 can be extended to apply not only to the reporting of "beam pairs capable of simultaneous reception" but also to the reporting of "beam pairs capable of simultaneous transmission". In other words, the existing group-based beam reporting can also be performed for the uplink. The following implementations can be considered based on method 1.

[0158] According to an embodiment, the UE may report "beam pairs capable of being simultaneously received and transmitted" or "beam pairs capable of being simultaneously transmitted" based on a reporting configuration of a base station. As a specific example, the reporting configuration may include a configuration related to group-based beam reporting. Based on a configuration related to group-based beam reporting (e.g., parameter groupBasedBeamReporting), the UE may report CSI including information related to "beam pairs capable of being simultaneously transmitted" or "beam pairs capable of being simultaneously received and transmitted" to the base station.

[0159] For example, the parameter groupBasedBeamReporting can be set to a first value or a second value (see Table 5 below). The first value (e.g., JointULandDL) can be related to "a beam pair that can be received and transmitted simultaneously". The second value (e.g., ULOnly) can be related to "a beam pair that can be transmitted simultaneously".

[0160] Information related to “a beam pair capable of simultaneous reception and transmission” or “a beam pair capable of simultaneous transmission” may be based on two CRIs (or two SSBRIs) in each of one or more groups.

[0161] For "beam pairs capable of simultaneous reception and transmission": resources based on two CRIs (or two SSBRIs) (two CSI-RS resources or two SSB resources) can be received simultaneously by the UE. In other words, two CSI-RSs (or two SSBs) based on two CRIs (or two SSBRIs) can be received simultaneously by the UE. In addition, resources based on two CRIs (or two SSBRIs) (two CSI-RS resources or two SSB resources) can be applied by the UE for simultaneous transmission based on a spatial filter.

[0162] For “beam pairs capable of simultaneous transmission”: resources based on two CRIs (or two SSBRIs) (two CSI-RS resources or two SSB resources) can be applied to simultaneous transmission by UE based on a spatial filter.

[0163] The spatial filter may refer to a UL Tx spatial filter. The spatial filter may be determined based on two CRIs (or two SSBRIs).

[0164] According to an embodiment, the reporting configuration of the base station is the same as the existing method, but the UE can additionally report an indicator for whether simultaneous transmission is enabled or not to each group. In other words, the base station can perform group-based beam reporting configuration from a DL perspective (e.g., groupBasedBeamReporting='enabled' or groupBasedBeamReporting-r17). In this instance, the UE can additionally report a (1-bit) indicator for whether simultaneous transmission is enabled or not to each group (e.g., a resource group or a beam group).

[0165] [Table 4]

[0166]

[0167]

[0168] Information related to “beam pairs capable of simultaneous transmission” or “beam pairs capable of simultaneous reception and transmission” may be reported based on Table 5 below.

[0169] [Table 5]

[0170]

[0171] Method 1 is a method in which the UE selects / reports a combination of STxMP panels and beams. On the other hand, a method in which the base station configures / specifies a combination of STxMP panels or a candidate group of STxMP panels may be considered. Operations related to this method are described in detail in Method 2 below.

[0172] Method 2

[0173] The base station may specify / configure specific C-ID pairs / groups to the UE in the UE's beam report. The specific C-ID pairs / groups may include i) pairs / groups capable of STxMP (STxMP capable pair / group), and / or ii) pairs / groups that cannot perform STxMP (STxMP incapable pair / group).

[0174] The UE may report information about the CRI / SSBRI corresponding to the C-ID pair / group to the base station.

[0175] Specifically, the following operations may be performed based on method 2.

[0176] The base station may specify a specific C-ID pair / group based on the UE capability report of the UE. The UE may report the preferred CRI / SSBRI to the base station when performing UL transmission through the corresponding panel (based on the specific C-ID pair / group).

[0177] For example, the base station may specify / configure the C-ID pair / group capable of STxMP to the UE. The UE may report the CRI / SSBRI of the C-ID pair / group capable of STxMP to the base station. The UE may also report the beam quality value (e.g., L1-RSRP, L1-SINR) of the CRI / SSBRI to the base station.

[0178] The advantage of method 2 is that if the configuration / indication of the C-ID pair / group by the base station is added, the predefined beam reporting format can be utilized as is.

[0179] The following embodiments may be additionally applied to the above-mentioned proposed operations. Reception / measurement of CRI / SSBRI reported by the UE may be performed based on the relevant / specified C-ID. Reception / measurement of DL RS (CSI-RS / SSB) may be performed based on the C-ID specified by the base station (or a panel based on the C-ID).

[0180] Method 3

[0181] The base station may send a configuration related to beam reporting to the UE. In this instance, the configuration related to beam reporting may include information about the configuration / indication of selecting CRI / SSBRI only from combinations that can perform STxMP or combinations that cannot perform STxMP. Based on the configuration / indication, the UE reports information about CRI / SSBRI that can or cannot perform STxMP to the base station. In this instance, the UE may also report beam quality values ​​(e.g., L1-RSRP, L1-SINR) for CRI / SSBRI to the base station.

[0182] Method 2 is a method in which a base station specifies a C-ID pair / group to a UE. On the other hand, method 3 is a method in which configuration / indication is introduced to report a CRI / SSBRI that can (cannot) perform STxMP.

[0183] Method 3 also has the advantage that by adding additional configuration / indication of the base station only for beam reporting (for example, only selecting the configuration / indication of CRI / SSBRI from the combinations that can perform STxMP), the existing beam reporting format can be utilized as is.

[0184] For the operation of selecting / reporting CRI / SSBRI for each C-ID or panel in method 1, method 2 and / or method 3, the following implementations may be considered: The base station may configure candidate resources for selecting CRI / SSBRI to the UE.

[0185] The candidate resources may include candidate CSI-RS resources, SSB resources and / or interference measurement resources (e.g., CSI-IM resources for interference measurement, NZP CSI-RS resources). The candidate resources may be configured in groups. For example, one or more resource groups may be configured, and each resource group may include candidate resources.

[0186] Based on the configured candidate resources, the UE may select / determine an RS combination capable of STxMP as follows.

[0187] For example, the UE may select one resource from each resource group. The terminal may select RS combinations across multiple resource groups. In this case, each resource group may correspond to a unit (e.g., TRP, panel) that can generate only one receive beam at a time from the perspective of the base station.

[0188] For example, the UE may select resources only from each resource group. In this case, each resource group may correspond to a beam combination having a simultaneous reception capability through multiple beams from the perspective of the base station.

[0189] As an implementation, two RS resource sets may be configured in a report based on a Rel-17 beam group. In this instance, operations based on method 1, method 2, or method 3 may be performed. For example, the UE may report a C-ID corresponding to each RS resource set (method 1). For example, the base station may configure / specify a C-ID corresponding to each RS resource set to the UE (method 2). For example, the UE may select an RS combination capable of STxMP within the same resource set or across two resource sets (e.g., one for each set) (method 3).

[0190] In the present disclosure, a "panel" may correspond to a "TRP" of a received signal, and may correspond to a "beam RS (set)", a "CORESET pool", a "PUCCH / SRS resource group", and the like.

[0191] From an implementation perspective, the operation of the base station / UE according to the above embodiment (for example, the operation based on at least one of method 1, method 2 or method 3) can be performed as follows: Figure 6 devices (e.g., 100 and 200) to process.

[0192] The operation of the base station / UE according to the above embodiment (for example, the operation based on at least one of method 1, method 2 or method 3) can be stored in a memory (for example, Figure 6 140 and 240) to run at least one processor (e.g., Figure 6 processors 110 and 210).

[0193] Refer to the following Figure 3 The signaling process based on the above implementation is described in detail.

[0194] Figure 3 A signaling process according to an embodiment of the present disclosure is illustrated.

[0195] More specifically, Figure 3 An example of signaling between a user equipment (UE) and a base station (BS) based on the above-proposed methods (eg, method 1, method 2, method 3) is illustrated.

[0196] UE / BS are merely examples and may be applied by being replaced with various devices. Figure 3 This is only for the convenience of description and does not limit the scope of the present disclosure. In addition, depending on the situation and / or settings, Figure 3 Some of the steps illustrated in the figure may be omitted.

[0197] Assumptions Figure 3 The UE and / or BS in the system supports multiple panels / TRPs. A TRP / panel may be a unit including one or more antennas, antenna ports, beams, and uplink / downlink RS / channel resources of a UE.

[0198] For example, an uplink transmission panel can be identified based on a source RS for an uplink channel / RS (e.g., UL TCI, spatial relationship), and a downlink transmission TRP can be identified based on a source RS for a downlink channel / RS (e.g., DL TCI, QCL RS). Specifically, a unit having a specific UL / DL resource set / group (ID) or a specific (panel-related) ID as a source RS can be identified.

[0199] In S305, the UE may report UE capability information to the BS. The UE capability information may include the report information for the C-ID as described above, and the corresponding UE capability value may include information on the maximum number of SRS ports that can be supported.

[0200] In S310, the UE may receive a configuration related to beam and panel reporting from the BS. The configuration may include information about the following items: the number of CRI / SSBRIs to be reported, the measurement value to be reported (e.g., reporting L1-RSRP or L1-SINR), report type information (e.g., whether it is a non-periodic report, a semi-persistent report on PUSCH, a semi-persistent report on PUCCH, or a periodic report), information related to report periodicity and timing (e.g., periodicity, time slot offset, etc.), and an indicator for a report including a C-ID. In addition, a configuration for a beam / panel reporting method for applying the method proposed in the present disclosure may be included.

[0201] After the beam and panel reporting related configuration in S310, in S315, the BS may perform a separate reporting trigger / activation indication (for semi-persistent or aperiodic reporting) to the UE.

[0202] In S320, the UE that receives the beam and panel report related configuration of S310 (and the related trigger / activation message of S315) can periodically / aperiodically perform beam and panel related reporting based on the configuration (and the trigger / activation indication). The reporting information may include C-ID (for each CRI / SSBRI) and CRI / SSBRI and L1-RSRP / L1-SINR. The methods proposed in the present disclosure (e.g., method 1, method 2, method 3) can be applied to beam / panel reporting operations.

[0203] As described above, the above BS / UE signaling and operations may be performed by the following apparatus (eg, Figure 6 For example, the BS (eg, TRP 1 / TRP 2) may correspond to the first wireless device 100, and the UE may correspond to the second wireless device 200. In some cases, the opposite case may also be considered.

[0204] For example, the above BS / UE signaling and operations can be performed by Figure 6 The BS / UE signaling and operations described above may be stored in a memory (eg, a processor) in the form of commands / programs (eg, instructions, executable codes). Figure 6 140 and 240) to run Figure 6 at least one processor (e.g., 110 and 210).

[0205] Below, refer to Figure 4 and Figure 5 , the above implementation is described in detail from the operation perspective of the UE and the base station. The methods described below are distinguished only for the convenience of explanation. Therefore, as long as the methods are not mutually exclusive, it is obvious that a partial configuration of any method can be replaced by a partial configuration of another method or combined into a partial configuration of another method.

[0206] Figure 4 is a flowchart illustrating a method performed by a user equipment according to an embodiment of the present disclosure.

[0207] Reference Figure 4According to an embodiment of the present disclosure, the method performed by a user equipment (UE) in a wireless communication system includes a step S410 of receiving configuration information, a step S420 of receiving a downlink reference signal (DL RS), a step S430 of calculating channel state information (CSI), and a step S440 of reporting CSI.

[0208] In step S410, the UE receives configuration information related to channel state information (CSI) from the base station. The configuration information may include information based on at least one of the above-mentioned methods 1, 2 and / or 3.

[0209] The configuration information may include at least one of the following items: i) CSI interference management (IM) resource related information, ii) CSI measurement configuration related information, iii) CSI resource configuration related information, iv) CSI-RS resource related information, or v) CSI report configuration related information. For example, at least one of i) to v) may include information based on at least one of the above-mentioned methods 1, 2, and / or 3.

[0210] For example, the configuration information may be based on CSI report configuration related information (eg, CSI-ReportConfig IE). The CSI report configuration related information may include the report configuration of method 1 (eg, configuration / parameters related to group-based beam reporting).

[0211] According to an embodiment, the configuration information may include information related to group-based beam reporting (eg, parameter groupBasedBeamReporting). This embodiment may be based on method 1. For example, the type of resource indicator to be reported by the UE may be determined based on information related to group-based beam reporting.

[0212] According to an embodiment, the configuration information may include reporting quantities related to CSI.

[0213] For example, the reporting quantity can be set to 1) "cri"-"RI"-"PMI"-"CQI", 2) "cri"-"RI"-"i1", 3) "cri"-"RI"-"i1"-"CQI", 4) "cri"-"RI"-"CQI", 5) "cri"-"RSRP", 6) "ssb-Index"-"RSRP", 7) "cri"-"RI"-"LI"-"PMI"-"CQI", 8) "cri"-"SINR", 9) "ssb-Index"-"SINR", 10) "cri"-"RSRP"-"Index", 11) "ssb-Index"-"RSRP"-"Index", 12) "cri"-"SINR"-"Index" or 13) "ssb-Index"-"SINR"-"Index".

[0214] Based on the "reporting quantity", the CSI may include at least one of the following items: 1) channel quality indicator (CQI), 2) precoding matrix indicator (PMI), 3) CSI-RS resource indicator (CRI), 4) SSB resource block indicator (SSBRI), 5) layer indicator (LI), 6) rank indicator (RI), 7) layer 1-reference signal received strength (L1-RSRP), 8) layer 1-signal to interference and noise ratio (L1-SINR), and / or 9) CapabilityIndex or Index (index of a set of UE capability values).

[0215] The CSI may include one or more parameters based on each of 1) to 9). For example, the CSI may include one or more CRIs based on 3). For example, the CSI may include one or more CRIs based on 3), 4), and 9), one or more SSBRIs, and one or more indexes.

[0216] In this instance, the reporting quantity can be configured to report parameters related to group-based beam reporting. Specifically, the reporting quantity can be set to: i) "cri"-"RSRP (Reference Signal Received Power)", ii) "ssb-Index"-"RSRP", iii) "cri"-"RSRP"-"Index", or iv) "ssb-Index"-"RSRP"-"Index". "cri" is the CSI-RS resource indicator (CRI). "ssb-Index" is the SS / PBCH block (SSB) resource indicator (SSBRI). "Index" is the index of the UE capability value set. The maximum number of SRS antenna ports supported can be indicated based on the index of the UE capability value set.

[0217] In step S420, the UE receives at least one downlink reference signal (DL RS) from the base station.

[0218] The at least one DL RS may be based on a synchronization signal / physical broadcast channel block (SS / PBCH block) (SSB) and / or a channel state information reference signal (CSI-RS).

[0219] For example, the at least one DL RS may include a CSI-RS and / or SSB based on the two CSI resource sets.

[0220] In step S430 , the UE calculates CSI based on measurement of at least one DL RS.

[0221] The parameters included in the CSI may be determined / calculated based on the measurement of at least one DL RS. The parameters included in the CSI may be parameters based on "report quantity".

[0222] In step S440, the UE reports the CSI to the base station.

[0223] CSI may be reported periodically, semi-persistently, or aperiodically.

[0224] The CSI may be sent on the Physical Uplink Control Channel (PUCCH) or the Physical Uplink Shared Channel (PUSCH).

[0225] Periodic CSI reporting is performed on short PUCCH or long PUCCH. Semi-persistent (SP) CSI reporting is performed on short PUCCH, long PUCCH or PUSCH. Aperiodic CSI reporting is performed on PUSCH and is triggered by DCI. In this case, information related to aperiodic CSI reporting triggering can be sent / indicated / configured via MAC-CE.

[0226] Based on the base station configuration of method 1, beam pairs capable of STxMP ("beam pairs capable of simultaneous reception and transmission" or "beam pairs capable of simultaneous transmission") may be reported. Beam pairs may be reported for each of one or more groups. The beam pairs of each group may be based on two CRIs or two SSBRIs. Embodiments related thereto are described in detail below.

[0227] According to an embodiment, the CSI may include a resource indicator associated with each of the one or more groups. This embodiment may be based on method 1. In this instance, the CSI may also include an index to a set of UE capability values. The reporting instance associated with the resource indicator may be the same as or different from the reporting instance for the index to the set of UE capability values.

[0228] For example, the number of one or more groups (e.g., 1, 2, 3 or 4, ...) may be set based on the configuration information. Specifically, the number of one or more groups may be determined based on the parameter nrofReportedGroups included in the configuration information. The parameter nrofReportedGroups indicates the number of (resource) groups reported per CSI report.

[0229] For example, a resource indicator may be reported based on a first reporting instance (e.g., a first CSI report), and an index of a set of UE capability values ​​may be reported based on a second reporting instance (e.g., a second CSI report). The CSI may include a CSI field associated with the first reporting instance and a CSI field associated with the second reporting instance.

[0230] For example, the resource indicator and the index of the UE capability value set may be based on the same reporting instance. The CSI may include CSI fields related to the same reporting instance.

[0231] According to an embodiment, the resource indicator may be associated with simultaneous transmission by the UE based on a spatial filter. The spatial filter may refer to a UL Tx spatial filter.

[0232] Depending on the implementation, the resource indicator may include: i) two CRIs, or ii) two SSBRIs.

[0233] The resource indicator may be a resource indicator related to simultaneous reception and simultaneous transmission of the UE, or a resource indicator related to simultaneous transmission of the UE. This will be described in detail below.

[0234] For example, the CSI-RS resources and / or SSB resources of each group in one or more groups may be applied for simultaneous transmission. In other words, when the UE performs uplink transmission based on the spatial filter, the CSI-RS resources and / or SSB resources of each group may be applied. According to an embodiment, the spatial filter (or UL Tx spatial filter) may be determined based on the CSI-RS resources and / or SSB resources of each group. The determined spatial filters may be applied simultaneously.

[0235] For example, the CSI-RS resources and / or SSB resources of each group may be received simultaneously by the UE. Specifically, the CSI-RS and / or SSB based on the CSI-RS resources and / or SSB resources of each group may be received simultaneously by the UE. According to an embodiment, the beam pairs (or spatial domain reception filters) that the UE may receive simultaneously may be determined based on the CSI-RS resources and / or SSB resources of each group.

[0236] According to an embodiment, simultaneous transmission may be performed based on UE capabilities. UE capabilities may be related to the maximum number of SRS antenna ports supported.

[0237] According to an embodiment, CSI including the first resource indicator or the second resource indicator related to each group may be reported based on information related to group-based beam reporting.

[0238] Resources based on the first resource indicator (eg, two CSI-RS resources or two SSB resources) may be simultaneously received by the UE and applied for simultaneous transmission.

[0239] Resources based on the second resource indicator may be applicable for the simultaneous transmission.

[0240] Information related to group-based beam reporting (e.g., parameter groupBasedBeamReporting) may represent a first value related to reporting of a first resource indicator (e.g., JointULandDL) or a second value related to reporting of a second resource indicator (e.g., ULOnly).

[0241] For example, based on the parameter groupBasedBeamReporting being set to a first value (eg, JointULandDL), the UE reports CSI including a first resource indicator.For example, based on the parameter groupBasedBeamReporting being set to a second value (eg, ULOnly), the UE reports CSI including a second resource indicator.

[0242] According to an embodiment, the resource indicator may be based on two resource indicators. Based on the two resource indicators, one CSI-RS or one SSB may be selected from each of the two CSI resource sets.

[0243] The operations based on the above steps S410 to S440 can be performed by Figure 6 For example, the UE 200 may control one or more transceivers 230 and / or one or more memories 240 to perform operations based on steps S410 to S440.

[0244] The above implementation is described in detail below from the perspective of base station operation.

[0245] Steps S510 to S530 described below correspond to the steps of Figure 4 In view of the above correspondence, redundant descriptions are omitted. That is, the detailed description of the base station operation described below can be replaced by the corresponding description of the base station operation. Figure 4 For example, Figure 4 The description / implementation of steps S410 and S420 in the above-described embodiment may additionally be applied to the base station operations of steps S510 and S520 described below. For example, Figure 4 The description / implementation of steps S430 and S440 in the embodiment may be additionally applied to the base station operation of step S530 described below.

[0246] Figure 5 is a flowchart illustrating a method performed by a base station according to another embodiment of the present disclosure.

[0247] Reference Figure 5 According to another embodiment of the present disclosure, a method performed by a base station in a wireless communication system includes a step S510 of sending configuration information, a step S520 of sending a downlink reference signal (DL RS), and a step S530 of receiving channel state information (CSI).

[0248] In step S510, the base station sends configuration information related to channel state information (CSI) to the UE.

[0249] In step S520, the base station sends at least one DL RS to the UE.

[0250] In step S530, the base station receives CSI from the UE. The CSI may be calculated based on the measurement of the UE for at least one DL RS.

[0251] The operations based on the above steps S510 to S530 can be performed by Figure 6 For example, the base station 100 may control one or more transceivers 130 and / or one or more memories 140 to perform operations based on steps S510 to S530.

[0252] Refer to the following Figure 6 The following describes a device to which the embodiments of the present disclosure are applicable (a device that implements the method / operation according to the embodiments of the present disclosure).

[0253] Figure 6 The configurations of the first device and the second device according to the embodiment of the present disclosure are illustrated.

[0254] The first device 100 may include a processor 110 , an antenna unit 120 , a transceiver 130 , and a memory 140 .

[0255] The processor 110 may perform signal processing related to the baseband, and includes a high-level processing unit 111 and a physical layer processing unit 115. The high-level processing unit 111 may process operations of a MAC layer, an RRC layer, or a higher layer. The physical layer processing unit 115 may process operations of a PHY layer. For example, if the first device 100 is a base station (BS) device in BS-UE communication, the physical layer processing unit 115 may perform uplink received signal processing, downlink transmitted signal processing, etc. For example, if the first device 100 is a first UE device in inter-UE communication, the physical layer processing unit 115 may perform downlink received signal processing, uplink transmitted signal processing, sidelink transmitted signal processing, etc. In addition to performing signal processing related to the baseband, the processor 110 may also control the overall operation of the first device 100.

[0256] The antenna unit 120 may include one or more physical antennas, and if the antenna unit 120 includes multiple antennas, MIMO transmission / reception is supported. The transceiver 130 may include a radio frequency (RF) transmitter and an RF receiver. The memory 140 may store information processed by the processor 110 and software, an operating system, and applications related to the operation of the first device 100. The memory 140 may also include components such as a buffer.

[0257] In the embodiments described in the present disclosure, the processor 110 of the first device 100 may be configured to implement operations of a BS in BS-UE communication (or operations of a first UE device in inter-UE communication).

[0258] The second device 200 may include a processor 210 , an antenna unit 220 , a transceiver 230 , and a memory 240 .

[0259] The processor 210 may perform signal processing related to the baseband, and includes a high-level processing unit 211 and a physical layer processing unit 215. The high-level processing unit 211 may process operations of a MAC layer, an RRC layer, or a higher layer. The physical layer processing unit 215 may process operations of a PHY layer. For example, if the second device 200 is a UE device in BS-UE communication, the physical layer processing unit 215 may perform downlink received signal processing, uplink transmitted signal processing, etc. For example, if the second device 200 is a second UE device in inter-UE communication, the physical layer processing unit 215 may perform downlink received signal processing, uplink transmitted signal processing, side link received signal processing, etc. In addition to performing signal processing related to the baseband, the processor 210 may also control the overall operation of the second device 210.

[0260] The antenna unit 220 may include one or more physical antennas, and if the antenna unit 220 includes multiple antennas, MIMO transmission / reception is supported. The transceiver 230 may include an RF transmitter and an RF receiver. The memory 240 may store information processed by the processor 210 and software, operating systems, and applications related to the operation of the second device 200. The memory 240 may also include components such as a buffer.

[0261] In the embodiments described in the present disclosure, the processor 210 of the second device 200 may be configured to implement the operation of the UE in BS-UE communication (or the operation of the second UE device in inter-UE communication).

[0262] The description of the BS and the UE in BS-UE communication (or the first UE device and the second UE device in inter-UE communication) in the examples of the present disclosure are equally applicable to the operations of the first device 100 and the second device 200, and redundant descriptions are omitted.

[0263] In addition to LTE, NR, and 6G, the wireless communication technology implemented in the apparatus 100 and the apparatus 200 according to the present disclosure may also include a narrowband Internet of Things (NB-IoT) for low-power communication. For example, the NB-IoT technology may be an example of a low-power wide area network (LPWAN) technology and may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2. The NB-IoT technology is not limited to the above names.

[0264] Additionally or alternatively, the wireless communication technology implemented in the apparatus 100 and the apparatus 200 according to the present disclosure may perform communication based on the LTE-M technology. For example, the LTE-M technology may be an example of the LPWAN technology and may be referred to as various names, such as enhanced machine type communication (eMTC). For example, the LTE-M technology may be implemented with at least one of various standards, such as 1) LTE CAT0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M. The LTE-M technology is not limited to the above names.

[0265] Additionally or alternatively, in consideration of low power communication, the wireless communication technology implemented in the apparatus 100 and the apparatus 200 according to the present disclosure may include at least one of ZigBee, Bluetooth, and a low power wide area network (LPWAN), and is not limited to the above names. For example, ZigBee technology may create a personal area network (PAN) related to small / low power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method comprising the following steps: receiving configuration information related to channel state information (CSI), the configuration information including information related to group-based beam reporting; Receiving at least one downlink reference signal DL RS; calculating the CSI based on measurements of the at least one DL RS; and The CSI reported, wherein the CSI comprises a resource indicator associated with each of the one or more groups, and The resource indicator is related to simultaneous transmission by the UE based on a spatial filter.

2. The method according to claim 1, wherein: The configuration information includes a reporting amount related to the CSI, and The reported amount is set as i) "cri"-"reference signal received power RSRP", ii) "ssb-Index"-"RSRP", iii) "cri"-"RSRP"-"Index" or iv) "ssb-Index"-"RSRP"-"Index".

3. The method according to claim 2, wherein: The cri is a CSI-RS resource indicator CRI, and the ssb-Index is a SS / PBCH block resource indicator SSBRI, Wherein, the Index is the index of the UE capability value set, and The maximum number of SRS antenna ports supported is indicated based on the index of the UE capability value set.

4. The method according to claim 3, wherein: The resource indicator includes i) two CRIs or ii) two SSBRIs.

5. The method according to claim 4, wherein: The CSI-RS resources and / or SSB resources of each group can be applied to the simultaneous transmission.

6. The method according to claim 4, wherein: The CSI-RS resources and / or SSB resources of each group can be received by the UE simultaneously.

7. The method according to claim 3, wherein: The simultaneous transmission is performed based on UE capabilities.

8. The method according to claim 7, wherein: The UE capability is related to the maximum number of SRS antenna ports supported.

9. The method according to claim 3, wherein: The CSI also includes the index of the UE capability value set.

10. The method according to claim 1, wherein: reporting the CSI including the first resource indicator or the second resource indicator associated with each of the groups based on the information associated with the group-based beam reporting, wherein resources based on the first resource indicator can be simultaneously received by the UE and applied to the simultaneous transmission, and Therein, resources based on the second resource indicator can be applied to the simultaneous transmission.

11. The method according to claim 10, wherein: The information related to the group-based beam reporting represents a first value related to reporting of the first resource indicator or a second value related to reporting of the second resource indicator.

12. The method according to claim 1, wherein: The resource indicator is based on two resource indicators, and Wherein, based on the two resource indicators, a CSI-RS or an SSB is selected from each of the two CSI resource sets.

13. A user equipment UE operating in a wireless communication system, the UE comprising: one or more transceivers; one or more processors; as well as one or more memories operatively connected to the one or more processors and storing instructions that upon execution by the one or more processors configure the one or more processors to perform operations, The operations include: receiving configuration information related to channel state information (CSI), the configuration information including information related to group-based beam reporting; Receiving at least one downlink reference signal DL RS; calculating the CSI based on measurements of the at least one DL RS; and The CSI reported, wherein the CSI includes information for a resource indicator associated with each of the one or more groups, and The resource indicator is related to simultaneous transmission by the UE based on a spatial filter.

14. A device, comprising: one or more memories; as well as one or more processors, the one or more processors being operatively connected to the one or more memories, wherein the one or more memories include instructions that, upon being executed by the one or more processors, configure the one or more processors to perform operations, The operations include: receiving configuration information related to channel state information (CSI), the configuration information including information related to group-based beam reporting; Receiving at least one downlink reference signal DL RS; calculating the CSI based on measurements of the at least one DL RS; and The CSI reported, wherein the CSI includes information for a resource indicator associated with each of the one or more groups, and The resource indicator is related to simultaneous transmission by the UE based on a spatial filter.

15. One or more non-transitory computer-readable media storing one or more instructions, in, The one or more instructions executable by one or more processors configure the one or more processors to perform operations, The operations include: receiving configuration information related to channel state information (CSI), the configuration information including information related to group-based beam reporting; Receiving at least one downlink reference signal DL RS; calculating the CSI based on measurements of the at least one DL RS; and The CSI reported, wherein the CSI includes information for a resource indicator associated with each of the one or more groups, and The resource indicator is related to simultaneous transmission by the UE based on a spatial filter.

16. A method performed by a base station in a wireless communication system, the method comprising the following steps: Sending configuration information related to channel state information (CSI), the configuration information including information related to group-based beam reporting; Sending at least one downlink reference signal DL RS; as well as receiving the CSI, The CSI is calculated based on a measurement of the at least one DL RS by a user equipment UE, wherein the CSI includes information for a resource indicator associated with each of the one or more groups, and The resource indicator is related to simultaneous transmission by the UE based on a spatial filter.

17. A base station operating in a wireless communication system, the base station comprising: one or more transceivers; one or more processors; as well as one or more memories operatively connected to the one or more processors and storing instructions that upon execution by the one or more processors configure the one or more processors to perform operations, The operations include: Sending configuration information related to channel state information (CSI), the configuration information including information related to group-based beam reporting; transmitting at least one downlink reference signal DL RS; and receiving the CSI, The CSI is calculated based on a measurement of the at least one DL RS by a user equipment UE, wherein the CSI includes information for a resource indicator associated with each of the one or more groups, and The resource indicator is related to simultaneous transmission by the UE based on a spatial filter.

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