Method and apparatus for determining spatial and power domain adapted UE capabilities

Abstract

The disclosure relates to a method and apparatus for determining spatial and power domain adapted UE capabilities. A system and method for an enhanced beam management framework for spatial and power domain adaptation in NES is provided. A method performed by a terminal in a wireless communication system includes transmitting terminal capability information indicating that the terminal supports a first capability and a second capability to a base station; receiving configuration information based on the terminal capability information from the base station, wherein the configuration information comprises CSI report configuration; determining a capability to be used among the first capability and the second capability based on characteristics of the CSI report configuration; receiving a CSI-RS based on the configuration information; generating a CSI report according to the capability of use on the basis of the received CSI-RS; and transmitting the CSI report to the base station.

Description

Technical Field

[0001] The present disclosure generally relates to spatial and power domain adaptation support. More specifically, the subject matter disclosed herein relates to removing ambiguity when a user equipment (UE) supports both spatial and power domain adaptation according to both 3rd Generation Partnership Project (3GPP) Rel-15 and Rel-18. Background Art

[0002] To support spatial and power domain adaptation, new capabilities of the total number of supported channel state information (CSI) report settings, the maximum number of coexisting non-zero power (NZP)-CSI-reference signal (RS) resources, and the maximum number of all CSI-RS ports in coexisting NZP-CSI-RS resources have been introduced in 3GPP Rel-18. However, since the Rel-15 capabilities also include similar capabilities, there may be an interpretive ambiguity when a UE reports support for both Rel-15 capabilities and the new capabilities according to Rel-18. Summary of the Invention

[0003] Therefore, one aspect of the present disclosure is to provide a method for resolving such ambiguity.

[0004] In an embodiment, a method performed by a terminal in a wireless communication system includes: sending terminal capability information indicating that the terminal supports a first capability and a second capability to a base station; receiving configuration information based on the terminal capability information from the base station, the configuration information including a CSI report configuration; determining, based on characteristics of the CSI report configuration, a capability to be used between the first capability and the second capability; receiving CSI-RS based on the configuration information; generating a CSI report according to the used capability based on the received CSI-RS; and sending the CSI report to the base station.

[0005] In an embodiment, a terminal used in a wireless communication system includes: a transceiver; and a processor configured to send, via the transceiver, terminal capability information indicating that the terminal supports a first capability and a second capability to a base station, receive, via the transceiver, configuration information based on the terminal capability information from the base station, the configuration information including a CSI report configuration, determine, based on characteristics of the CSI report configuration, a capability to be used between the first capability and the second capability, receive CSI-RS based on the configuration information via the transceiver, generate a CSI report according to the used capability based on the received CSI-RS, and send the CSI report to the base station via the transceiver.

[0006] In an embodiment, a method performed by a base station in a wireless communication system includes: receiving, from a terminal, terminal capability information indicating that the terminal supports a first capability and a second capability; sending, to the terminal, configuration information based on the terminal capability information, where the configuration information includes a CSI report configuration, and where a characteristic of the CSI report configuration is used by the terminal to identify a capability to be used among the first capability and the second capability; sending CSI-RS based on the configuration information; and receiving, from the terminal, a CSI report generated based on the sent CSI-RS according to the used capability.

[0007] In an embodiment, a base station used in a wireless communication system includes: a transceiver; and a processor configured to receive, via the transceiver, from a terminal, terminal capability information indicating that the terminal supports a first capability and a second capability, send, via the transceiver, to the terminal, configuration information based on the terminal capability information, where the configuration information includes a CSI report configuration, and where a characteristic of the CSI report configuration is used by the terminal to identify a capability to be used among the first capability and the second capability, send CSI-RS based on the configuration information via the transceiver, and receive, via the transceiver, from the terminal, a CSI report generated based on the sent CSI-RS according to the used capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In the following sections, aspects of the subject matter disclosed herein will be described with reference to exemplary embodiments shown in the accompanying drawings, where:

[0009] Figure 1 is a signal flow diagram illustrating CSI report operations according to an embodiment;

[0010] Figure 2 is a flowchart illustrating a method performed by a terminal according to an embodiment;

[0011] Figure 3 is a flowchart illustrating a method performed by a base station according to an embodiment;

[0012] Figure 4 is a block diagram of an electronic device in a network environment according to an embodiment; and

[0013] Figure 5 illustrates a system including a UE and a gNB communicating with each other. DETAILED DESCRIPTION

[0014] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, those skilled in the art will understand that the disclosed aspects may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to obscure the subject matter disclosed herein.

[0015] References to "one embodiment" or "an embodiment" in the present specification mean that the particular features, structures, or characteristics described in connection with that embodiment may be included in at least one embodiment disclosed herein. Thus, the phrases "in one embodiment," "in an embodiment," or "in accordance with an embodiment" (or other phrases with similar meanings) that appear throughout the present specification do not necessarily all refer to the same embodiment. In addition, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In this regard, as used herein, the word "exemplary" means "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" should not be construed as necessarily being more preferred or advantageous than other embodiments. Additionally, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Further, depending on the context discussed herein, singular terms may include the corresponding plural forms, and plural terms may include the corresponding singular forms. Similarly, hyphenated terms (e.g., "two-dimensional," "pre-determined," "pixel-specific," etc.) may occasionally be used interchangeably with the corresponding non-hyphenated versions (e.g., "two dimensional," "pre determined," "pixel specific," etc.), and capitalized entries (e.g., "Counter Clock," "Row Select," "Pixel Output," etc.) may be used interchangeably with the corresponding non-capitalized versions (e.g., "counter clock," "row select," "pixel output," etc.). Such occasional interchangeable use should not be regarded as inconsistent with each other.

[0016] In addition, depending on the context discussed herein, singular terms may include the corresponding plural forms, and plural terms may include the corresponding singular forms. It should also be noted that the various figures (including component diagrams) shown and discussed herein are for illustrative purposes only and are not drawn to scale. For example, for clarity, the dimensions of some elements may be enlarged relative to other elements. Additionally, where appropriate, reference numerals are repeated in the figures to indicate corresponding and / or similar elements.

[0017] The terms used herein are for the purpose of describing only some example embodiments and are not intended to limit the claimed subject matter. As used herein, the singular forms are intended to also include the plural forms unless the context clearly indicates otherwise. It will be further understood that when used in this specification, the terms "comprises" and / or "comprising" specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0018] It should be understood that when an element or layer is referred to as being on, "connected to", or "coupled to" another element or layer, it can be directly on, connected to, or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on", "directly connected to", or "directly coupled to" another element or layer, no intervening elements or layers are present. Like reference numerals always refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0019] As used herein, terms such as "first", "second", etc. are used as labels for the nouns that follow them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.), unless explicitly defined as such. Additionally, the same reference numerals may be used in two or more figures to refer to components, assemblies, blocks, circuits, units, or modules having the same or similar functionality. However, this use is only for simplicity of illustration and ease of discussion; it does not mean that the construction or architectural details of such components or units are the same in all embodiments, or that such commonly referenced components / modules are the only way to implement some of the example embodiments disclosed herein.

[0020] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this subject matter belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense, unless expressly so defined herein.

[0021] As used herein, the term "module" refers to any combination of software, firmware, and / or hardware that is configured to provide the functionality described herein in connection with the module. For example, software may be implemented as a software package, code, and / or instruction set or instructions, and the term "hardware" as used in any of the embodiments described herein may include, for example, components, hardwired circuits, programmable circuits, state machine circuits, and / or firmware that stores instructions executed by the programmable circuit, either individually or in any combination. Modules may be implemented jointly or separately as a circuit that forms part of a larger system, such as, but not limited to, an integrated circuit (IC), a system on a chip (SoC), a component, etc.

[0022] Figure 1 is a signal flow diagram showing CSI reporting operations according to an embodiment.

[0023] Reference Figure 1, in step 101, the base station (i.e., gNB) and the UE perform a Radio Resource Control (RRC) procedure, during which the UE provides UE capability information to the gNB, and in response, the gNB sends configuration information to the UE for the UE to receive CSI signals, generate CSI reports, and send CSI reports to the gNB. For example, the configuration information may include CSI resource configuration, CSI report configuration, etc. As described above, the UE can support both Rel-15 capabilities and Rel-18 capabilities, and thus, it can indicate that it supports both Rel-15 capabilities and Rel-18 capabilities (e.g., as shown in Tables 1 and 2 below), and the gNB generates CSI report configuration in view of the UE's support for Rel-15 capabilities and / or Rel-18 capabilities.

[0024] In step 102, the gNB sends CSI-RS, which is measured by the UE according to the received configuration information.

[0025] In step 103, the UE sends a CSI report for the CSI-RS measured according to the CSI report configuration to the gNB based on the received CSI-RS.

[0026] As described above, in order to support spatial and power domain adaptation, new capabilities have been introduced in 3GPP Rel-18, including the total supported number of CSI report settings, the maximum supported number of simultaneous NZP-CSI-RS resources, and the maximum supported number of all CSI-RS ports in simultaneous NZP-CSI-RS resources. However, for these new capabilities, there already exist traditional Rel-15 capabilities, as shown in Table 1 below.

[0027] More specifically, referring to Table 1, components 4-7 of Feature Group (FG) 2-33 correspond to the maximum supported number of simultaneous NZP-CSI-RS resources and the maximum supported number of all CSI-RS ports in simultaneous NZP-CSI-RS resources, and components 1, 3, and 6 of FG 2-35 correspond to the total supported number of CSI report settings.

[0028] Table 1

[0029]

[0030]

[0031] The newly introduced Rel-18 capabilities for supporting spatial and power domain adaptation are shown in Table 2 below.

[0032] More specifically, in Table 2, components 4-7 of FG 42-1, 42-1a, 42-1b, 42-1c, 42-2, and 42-2b and components 3-6 of FG 42-2a and 42-2c correspond to the maximum supported number of simultaneous NZP-CSI-RS resources and the maximum supported number of all CSI-RS ports in the simultaneous NZP-CSI-RS resources. Additionally, component 9 of FG 42-1, 42-1a, 42-1b, 42-1c, 42-2, and 42-2b and component 8 of FG 42-2a and 42-2c correspond to the total supported number of CSI report settings.

[0033] Table 2

[0034]

[0035]

[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

[0042] As described above, if the UE reports both Rel-15 capabilities and Rel-18 capabilities, the simultaneous presence of both Rel-15 capabilities and Rel-18 capabilities for the same functions as those shown above may create interpretive ambiguity. Thus, one aspect of the present disclosure is to remove such ambiguity. More specifically, a mechanism is provided to determine which capabilities to use.

[0043] According to an embodiment, when the CSI report configuration in a bandwidth part (BWP) includes at least one CSI report setting with a sub-configuration, the value reported in the new Rel-18 capabilities is used for the BWP instead of the value reported in the legacy Rel-15 capabilities.

[0044] For example, considering components 4-5 of FG 42-1, 42-1a, 42-1b, 42-1c, 42-2, and 42-2b in Table 2, when the CSI report configuration in the active BWP of a component carrier (CC) includes the corresponding Rel-18 report configuration, the value reported in component 4 or 5 can be used for that CC.

[0045] As another example, consider component 9 of FG 42-1, 42-1a, 42-1b, 42-1c, 42-2, and 42-2b in Table 2. When the CSI report configuration in a BWP includes the corresponding Rel-18 report configuration, the reported value in component 9 can be used for the BWP instead of the value reported in FG 2-35.

[0046] The mechanism works effectively when the corresponding capability provides per-CC values, such as components 4 and 5 of FG 42-1, 42-1a, 42-1b, 42-1c, 42-2, and 42-2b, components 3 and 4 of FG 42-2a and 42-2c, component 9 of FG 42-1, 42-1a, 42-1b, 42-1c, 42-2, and 42-2b, and component 8 of FG 42-2a and 42-2c.

[0047] When the corresponding capability provides an "all CCs" value, such as components 6 and 7 of FG 42-1, 42-1a, 42-1b, 42-1c, 42-2, and 42-2b and components 5 and 6 of FG 42-2a and 42-2c, when the CSI report configuration in the active BWP of any CC includes at least one CSI report setting with a sub-configuration, the reported value in the new Rel-18 capability is used instead of the value reported in the legacy Rel-15 capability.

[0048] For example, consider components 6 and 7 of FG 42-1, 42-1a, 42-1b, 42-1c, 42-2, and 42-2b in Table 2. When the CSI report configuration in the active BWP of any CC includes the corresponding Rel-18 report configuration, the reported value in component 6 or 7 is used.

[0049] The above mechanism can also be expressed by using the names of RRC capability signaling (e.g., maxNumberSimultaneousNZP-CSI-RS-PerCC, maxNumberCSI-ResourcePerCC-r18, etc.) as follows.

[0050] More specifically, the UE may indicate the number of supported simultaneous NZP-CSI-RS resources in a CC using the parameter maxNumberSimultaneousNZP-CSI-RS-PerCC or maxNumberCSI-ResourcePerCC-r18, and indicate the number of supported simultaneous NZP-CSI-RS resources in the active BWP across all component carriers using the parameter maxNumberSimultaneousNZP-CSI-RS-ActBWP-AllCC or maxNumberCSI-ResourceAcrossCC-r18. If the UE is configured with at least one CSI report setting with sub-configurations in a CC, the UE will use maxNumberCSI-ResourcePerCC-r18; otherwise, the UE will use maxNumberSimultaneousNZP-CSI-RS-PerCC.

[0051] If the UE is configured with at least one CSI report setting with sub-configurations in any component carrier, the UE will use maxNumberCSI-ResourceAcrossCC-r18; otherwise, the UE will use maxNumberSimultaneousNZP-CSI-RS-ActBWP-AllCC.

[0052] The UE indicates the total number of ports supported in simultaneous NZP-CSI-RS resources in a CC using the parameter totalNumberPortsSimultaneousNZP-CSI-RS-PerCC or maxNumberTotalCSI-ResourcePerCC-r18, and indicates the total number of ports supported in simultaneous NZP-CSI-RS resources in the active BWP across all component carriers using the parameter totalNumberPortsSimultaneousNZP-CSI-RS-ActBWP-AllCC or maxNumberPortsAcrossCC-r18.

[0053] If the UE is configured with at least one CSI report setting with sub-configurations in a CC, the UE will use maxNumberTotalCSI-ResourcePerCC-r18; otherwise, the UE will use totalNumberPortsSimultaneousNZP-CSI-RS-PerCC.

[0054] If the UE is configured with at least one CSI reporting setting with sub-configurations in any CC, the UE shall use maxNumberPortsAcrossCC-r18; otherwise, the UE shall use totalNumberPortsSimultaneousNZP-CSI-RS-ActBWP-AllCC.

[0055] The UE indicates the number of supported periodic CSI reporting settings per BWP with the parameter maxNumberPeriodicCSI-PerBWP-ForCSI-Report or totalNumberCSI-Reporting-r18. If the UE is configured with at least one CSI reporting setting with sub-configurations in the BWP of the serving cell, the UE shall use totalNumberCSI-Reporting-r18 for the BWP; otherwise, the UE shall use maxNumberPeriodicCSI-PerBWP-ForCSI-Report for the BWP.

[0056] The UE indicates the number of supported aperiodic CSI reporting settings per BWP with the parameter maxNumberAperiodicCSI-PerBWP-ForCSI-Report or totalNumberCSI-Reporting-r18. If the UE is configured with at least one CSI reporting setting with sub-configurations in the BWP of the serving cell, the UE shall use totalNumberCSI-Reporting-r18 for the BWP; otherwise, the UE shall use maxNumberAperiodicCSI-PerBWP-ForCSI-Report for the BWP.

[0057] The UE indicates the number of supported semi-persistent CSI reporting settings per BWP with the parameter maxNumberSemiPersistentCSI-PerBWP-ForCSI-Report or totalNumberCSI-Reporting-r18. If the UE is configured with at least one CSI reporting setting with sub-configurations in the BWP of the serving cell, the UE shall use totalNumberCSI-Reporting-r18 for the BWP; otherwise, the UE shall use maxNumberSemiPersistentCSI-PerBWP-ForCSI-Report for the BWP.

[0058] According to an embodiment, another aspect to be considered is how to determine the total limits for both Rel-15 CSI configuration and Rel-18 CSI configuration.

[0059] In one method, two values from Rel-15 capabilities and Rel-18 capabilities are used. For example, components 4-7 of FG 2-33 only count CSI-RS resources not associated with spatial domain adaptation or power domain adaptation. However, this may create unnecessary partitioning issues, which may also lead to underreporting in FG 2-33. For example, if a UE can support a total value N across Rel-15 configurations and Rel-18 configurations, the UE may divide N into two numbers such that N1 + N2 = N, signal N1 in FG 2-33, and signal N2 for the Rel-18 FG. However, this may not be ideal if the UE plans to mostly "reuse" the existing total capabilities to support Rel-18.

[0060] For example, assume the UE supports a value of 10 in FG 2-33 and considers updating the total capabilities to 13 in Rel-18. Unless the capability signaling interpretation allows sharing the total capability of 13 for Rel-15 configurations or Rel-18 configurations, the UE will need to apply partitioning between Rel-15 and Rel-18. If the UE determines (or estimates) that the Rel-18 configuration will require more resources, it may signal 10 for the Rel-18 portion and 3 for FG 2-33. However, this will have a negative impact on traditional operations and traditional gNBs.

[0061] Therefore, there is also a need for an alternative mechanism where the new Rel-18 capabilities for the maximum supported number of simultaneous NZP-CSI-RS resources and the maximum supported number of all CSI-RS ports in the simultaneous NZP-CSI-RS resources provide an overall limit with and without sub-configuration reporting settings. In other words, the NZP-CSI-RS resources and CSI-RS ports can be counted for reporting settings with and without sub-configurations.

[0062] Another aspect to consider is how to determine the overall limit of the number of simultaneous NZP-CSI-RS resources and the number of all CSI-RS ports in the simultaneous NZP-CSI-RS resources, including Type 1 Rel-18 CSI configurations and Type 2 Rel-18 CSI configurations, such as components 4-7 in FG 42-1 and 42-1b.

[0063] Similar to the above issues with Rel-15 capabilities and Rel-18 capabilities, the overall limits determined separately for Type 1 and Type 2 may not be desirable as it prohibits sharing of the total capabilities. To address this type of problem, according to an embodiment, the overall limit across Type 1 and Type 2 can be provided as the following three alternatives (Alt1, Alt2, and Alt3).

[0064] Alternative 1: If the UE reports both type 1 and type 2 for components 4 - 7 in FG 42 - 1 or 42 - 1b, and if the UE is configured with a CSI reporting setting having sub - configurations corresponding to both type 1 and type 2, the total number of supported NZP - CSI - RS resources / ports can be determined by the minimum of the reported values for both type 1 and type 2.

[0065] Alternative 2: If the UE does not report only type 1 or only type 2 for components 4 - 7 in both FG 42 - 1 and 42 - 1b, and if the UE is configured with a CSI reporting setting having sub - configurations corresponding to both type 1 and type 2, the total number of supported NZP - CSI - RS resources / ports can be determined by the minimum of the reported values for both type 1 and type 2.

[0066] Alternative 3: For components 4 - 7 in FG 42 - 1 and 42 - 1b, if the UE reports both type 1 and type 2 in FG 42 - 1 or 42 - 1b, if the UE reports only type 1 in FG 42 - 1 and only type 2 in FG 42 - 1b, or if the UE reports only type 2 in FG 42 - 1 and only type 1 in FG 42 - 1b, and if the UE is configured with a CSI reporting setting having sub - configurations corresponding to both type 1 and type 2, the total number of supported NZP - CSI - RS resources / ports can be determined by the minimum of the reported values for both type 1 and type 2.

[0067] Although Alternative 1 above has the simplest and most straightforward condition of "if the UE reports both type 1 and type 2 for components 4 - 7 in FG 42 - 1 or 42 - 1b", it may not cover the following case: when the UE reports only type 1 for FG 42 - 1 and only type 2 for FG 42 - 1b and the minimum of these two reported values is still used as the total value.

[0068] Alternative 2 above solves this problem with the modified condition of "if the UE does not report only type 1 or only type 2 for components 4 - 7 in both FG 42 - 1 and 42 - 1b".

[0069] Alternative 3 is somewhat equivalent to Alternative 2 while potentially improving clarity by using only affirmative statements.

[0070] Another thing to consider is the impact of the two values reported in FG 42-1 and 42-2 (or in FG 42-1b and 42-2b) on the maximum number of reporting settings including the legacy configuration. For example, if the UE signals different values in FG 42-1 and 42-2, and if both power and spatial domain adaptation are configured in the BWP, it is not clear which value is the total number including the legacy configuration. If N1 = the number of sub-configurations with spatial domain adaptation, N2 = the number of sub-configurations with power domain adaptation, and N3 = the number of legacy configurations, considering that the UE signals N4 in FG 42-1 and N5 in FG 42-2, the interpretation could be that N1, N2, and N3 should satisfy N1+N3 <= N4, and N2+N3 <= N5. In this case, it may be beneficial to clearly reflect this relationship in each component.

[0071] According to another embodiment of the present disclosure, component 9 of FG 42-1, 42-1b, 42-2, and 42-2b can be updated as shown in Table 3 below. In Table 3, the text in bold and underlined shows the updated text.

[0072] Table 3

[0073]

[0074] In the above scenario, the number of legacy configurations is counted twice for both N4 and N5, which may be inefficient. Therefore, as an alternative, the number of legacy configurations N3 can be divided into two numbers, for example, N3 / 2 and N3 / 2, to be counted for N4 and N5, or N3 can be counted only for one of N4 and N5, which is equivalent to dividing N3 into N3 and 0.

[0075] Another aspect to consider is when spatial and power domain adaptation are configured jointly. According to an embodiment, one approach is to create a new component corresponding to the joint operation such that the UE can report the total support number only for the joint operation separately. An example of such a component is provided in Table 4 below.

[0076] Table 4

[0077]

[0078] According to another embodiment, no new component is created and the existing total value can be reused. For example, if N1 = the number of sub-configurations with spatial domain adaptation, N2 = the number of sub-configurations with power domain adaptation, N3 = the number of traditional configurations, and N6 = the number of sub-configurations with joint spatial and power domain adaptation, considering that the UE signals N4 in FG 42-1 and signals N5 in FG 42-2, the interpretation can be that N1, N2, N3, and N6 should satisfy N1 + N3 + N6 <= N4, and N2 + N3 + N6 <= N5. In this case, it may be beneficial to clearly reflect this relationship in each component.

[0079] According to another embodiment of the present disclosure, the components 9 of FG 42-1, 42-1b, 42-2, and 42-2b can be updated as shown in Table 5 below. In Table 5, the bold and underlined text shows the updated text.

[0080] Table 5

[0081]

[0082]

[0083] In the above scheme, the number of joint configurations is counted twice for both N4 and N5, but this may be inefficient. As an alternative, the number of joint configurations N6 can be divided into two numbers, for example, N6 / 2 and N6 / 2, to be counted for N4 and N5, or N6 can be counted only for one of N4 and N5, which is equivalent to dividing N6 into two numbers N6 and 0.

[0084] Another aspect to consider is the number of CSI-RS resources.

[0085] FG 42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b have 4 common components (i.e., components 4-7), as shown in Table 6, which are related to components 4-7 of FG 2-33.

[0086] Table 6

[0087]

[0088] Components 9 in FG 42-1, 42-1b, 42-2, and 42-2b, and components 4-7 in FG 42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b involve the UE declaring separate values for each of periodic reporting, semi-persistent reporting, and aperiodic reporting, i.e., the first embodiment. This is different from the principle of FG 2-33, in which the UE declares a total of one value regardless of whether it is periodic reporting, semi-persistent reporting, or aperiodic reporting. However, this may have disadvantages, especially if the UE prefers a total limit rather than a limit per reporting type. For example, if the UE has a total limit N and if the UE supports periodic reporting, semi-persistent reporting, and aperiodic reporting, the UE may divide N into 3 numbers such that N1+N2+N3 = N and signal each value for each FG. If the UE signals N for all FGs, it may be interpreted that the UE supports 3N in total. Therefore, this results in an unnecessary digital division, which will also affect gNB flexibility. A similar problem may occur between FG 42-1s and FG 42-2s, i.e., across the spatial and power domains for adaptation.

[0089] According to the second embodiment, the values reported in FG 41-1s and FG 41-2s provide the total value across all reporting types and adaptation methods supported by the UE, and the UE will signal the same value in FG 41-1s and FG 41-2s.

[0090] How to consider both the Rel-15 reporting settings and the Rel-18 reporting settings when counting CSI-RS resources when using Rel-18 values may depend on the above two embodiments. For example, using the second embodiment, the Rel-18 value will be used for the total number of CSI-RS resources associated with the legacy or Rel-18 CSI reporting settings.

[0091] Using the first embodiment, a framework similar to component 9 of FG 42-1, 42-1b, 42-2, and 42-2b can be used. For example, if N1 = the number of CSI-RS resources associated with periodic reporting adapted to the spatial domain, N2 = the number of CSI-RS resources associated with periodic reporting adapted to the power domain, and N3 = the number of CSI-RS resources associated with conventional periodic reporting, considering that the UE signals N4 in FG 42-1 and signals N5 in FG 42-2, the interpretation can be that N1, N2, and N3 should satisfy N1 + N3 <= N4, and N2 + N3 <= N5. Here, the number of conventional configurations is counted twice for both N4 and N5, which may be inefficient. Therefore, as an alternative, the number of conventional configurations N3 can be divided into two numbers, for example, N3 / 2 and N3 / 2, to be counted for N4 and N5, or N3 can be counted only towards one of N4 and N5, which is equivalent to dividing N3 into two numbers of N3 and 0.

[0092] According to another embodiment, to explain each value reported in FG42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b for the total number of simultaneous NZP-CSI-RS resources (components 4 to 7), the following alternatives (Alt1, Alt2, and Alt3) can be utilized.

[0093] Alt1): The values in FG 42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b provide the total limit of CSI-RS resources associated with the conventional reporting setting together with the CSI-RS resources associated with the specific reporting type and adaptation method of the Rel-18 reporting setting. Therefore, components 4-7 can be modified accordingly. For example, FG 42-1 can be modified as shown in Table 7 below. In Table 7, the bold and underlined text shows the updated text.

[0094] Table 7

[0095]

[0096] Alt2): The values in FG 42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b provide the total limit of CSI-RS resources associated with the specific reporting type and adaptation method of the Rel-18 reporting setting. Therefore, components 4-7 can be modified accordingly. For example, FG 42-1 can be modified as shown in Table 8 below. In Table 8, the bold and underlined text shows the updated text.

[0097] Table 8

[0098]

[0099] The value in FG 2-33 additionally provides the total limit of CSI-RS resources associated with the legacy reporting settings. Therefore, the following note can be added to FG 42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b: "For components 4 to 7, the value in FG 2-33 provides the total limit of CSI-RS resources associated with reporting settings without sub-configurations".

[0100] Alt3): The values in FG 42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b provide the total limit of CSI-RS resources associated with the legacy reporting settings across all reporting types and adaptation methods supported by the UE, together with the CSI-RS resources associated with Rel-18 reporting settings, and the UE shall declare the same value in FG 42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b. The corresponding note can be added to FG 42-1, 42-1a, 42-1b, 42-2, 42-2a, and 42-2b.

[0101] In Alt1 and Alt2 above, the CSI-RS associated with joint spatial and power domain adaptation is not considered. Therefore, another thing to consider is when to configure spatial and power domain adaptation jointly. According to an embodiment, one method is to create a new component corresponding to such joint operation, so that the UE can report the total supported quantity only for the joint operation separately. In this case, the components are shown in Table 9 or 10 below.

[0102] Table 9

[0103]

[0104]

[0105] Table 10

[0106]

[0107] According to another embodiment, no new component is created, and the existing total value can be reused, as shown in Table 11 below.

[0108] For example, if N1 = the number of CSI-RS resources associated with periodic reporting adapted to the spatial domain, N2 = the number of CSI-RS resources associated with periodic reporting adapted to the power domain, N3 = the number of CSI-RS resources associated with conventional periodic reporting, and N6 = the number of CSI-RS resources associated with joint spatial and power domain adapted periodic reporting, considering that the UE signals N4 in FG 42-1 and signals N5 in FG 42-2, the interpretation would be that N1, N2, and N3 should satisfy N1 + N3 + N6 <= N4, and N2 + N3 + N6 <= N5.

[0109] Table 11

[0110]

[0111]

[0112] In the above method, the number of joint configurations is counted twice for both N4 and N5, but this may be inefficient. Therefore, as an alternative, the number of joint configurations N6 can be divided into two numbers, for example, N6 / 2 and N6 / 2, to be counted for N4 and N5, or N6 can be counted only for one of N4 and N5, which is equivalent to dividing N6 into two numbers N6 and 0.

[0113] Figure 2 is a flowchart showing a method performed by a terminal according to an embodiment.

[0114] Referring to Figure 2 , in step 201, the terminal (e.g., UE) sends terminal capability information indicating that the terminal supports the first capability and the second capability to the base station. For example, the first capability may be 3GPP Rel-15 capability, and the second capability may be 3GPP Rel-18 capability.

[0115] In step 202, the terminal receives configuration information based on the terminal capability information from the base station. The configuration information may include CSI report configuration.

[0116] In step 203, the terminal determines the capability to be used between the first capability and the second capability based on the characteristics of the CSI report configuration.

[0117] In step 204, the terminal receives CSI-RS based on the configuration information.

[0118] In step 205, the terminal generates a CSI report based on the received CSI-RS according to the used capability.

[0119] In step 206, the terminal sends the CSI report to the base station.

[0120] Figure 3 It is a flowchart showing a method performed by a base station according to an embodiment.

[0121] Refer to Figure 3 , in step 301, the base station (e.g., gNB) receives terminal capability information indicating that the terminal supports a first capability and a second capability from the terminal. For example, the first capability may be a 3GPP Rel-15 capability, and the second capability may be a 3GPP Rel-18 capability.

[0122] In step 302, the base station sends configuration information based on the terminal capability information to the terminal. The configuration information may include CSI report configuration. Additionally, the terminal uses the characteristics of the CSI report configuration to identify the capability used among the first capability and the second capability.

[0123] In step 303, the base station sends CSI-RS based on the configuration information.

[0124] In step 304, the base station receives a CSI report generated based on the sent CSI-RS according to the used capability from the terminal.

[0125] Figure 4 It is a block diagram of an electronic device in a network environment 400 according to an embodiment.

[0126] Refer to Figure 4 , the electronic device 401 in the network environment 400 (e.g., a UE as Figure 2 described) may communicate with the electronic device 402 via a first network 498 (e.g., a short-range wireless communication network), or communicate with the electronic device 404 or the server 408 via a second network 499 (e.g., a long-range wireless communication network). The electronic device 401 may communicate with the electronic device 404 via the server 408. The electronic device 401 may include a processor 420, a memory 430, an input device 450, a sound output device 455, a display device 460, an audio module 470, a sensor module 476, an interface 477, a tactile module 479, a camera module 480, a power management module 488, a battery 489, a communication module 490, a subscriber identification module (SIM) card 496, and / or an antenna module 497. In one embodiment, at least one of the components (e.g., the display device 460 or the camera module 480) may be omitted from the electronic device 401, or one or more other components may be added to the electronic device 401. Some of the components may be implemented as a single integrated circuit (IC). For example, the sensor module 476 (e.g., a fingerprint sensor, an iris sensor, or an illuminance sensor) may be embedded in the display device 460 (e.g., a display).

[0127] The processor 420 may execute software (e.g., program 440) to control at least one other component (e.g., a hardware or software component) coupled to the processor 420 of the electronic device 401, and may perform various data processing or computations, such as Figure 2 shown.

[0128] As at least part of the data processing or computation, the processor 420 may load commands or data received from another component (e.g., the sensor module 476 or the communication module 490) into the volatile memory 432, process the commands or data stored in the volatile memory 432, and store the resulting data in the non-volatile memory 434. The processor 420 may include a main processor 421 (e.g., a central processing unit (CPU) or an application processor (AP)) and an auxiliary processor 423 (e.g., a graphics processing unit (GPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that may operate independently of or in conjunction with the main processor 421. Additionally or optionally, the auxiliary processor 423 may be adapted to consume less power than the main processor 421 or perform a specific function. The auxiliary processor 423 may be implemented as separate from or as part of the main processor 421.

[0129] The auxiliary processor 423 may control at least some of the functions or states related to at least one of the components in the electronic device (e.g., the display device 460, the sensor module 476, or the communication module 490) instead of the main processor 421 when the main processor 421 is in an inactive (e.g., sleep) state, or may control at least some of the functions or states related to at least one of the components of the electronic device 401 (e.g., the display device 460, the sensor module 476, or the communication module 490) together with the main processor 421 when the main processor 421 is in an active state (e.g., executing an application). The auxiliary processor 423 (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module 480 or the communication module 490) that is functionally related to the auxiliary processor 423.

[0130] The memory 430 may store various data used by at least one component of the electronic device 401 (e.g., the processor 420 or the sensor module 476). The various data may include, for example, software (e.g., program 440) and input data or output data for commands associated with the software (e.g., program 440). The memory 430 may include the volatile memory 432 or the non-volatile memory 434. The non-volatile memory 434 may include an internal memory 436 and / or an external memory 438.

[0131] The program 440 can be stored as software in the memory 430 and can include, for example, an operating system (OS) 442, middleware 444, or an application 446.

[0132] The input device 450 can receive commands or data to be used by another component of the electronic device 401 (e.g., the processor 420) from the outside of the electronic device 401 (e.g., a user). The input device 450 can include, for example, a microphone, a mouse, or a keyboard.

[0133] The sound output device 455 can output a sound signal to the outside of the electronic device 401. The sound output device 455 can include, for example, a speaker or a receiver. The speaker can be used for general purposes such as playing multimedia or recording, and the receiver can be used for receiving incoming calls. The receiver can be implemented separately from the speaker or as part of the speaker.

[0134] The display device 460 can visually provide information to the outside of the electronic device 401 (e.g., to a user). The display device 460 can include, for example, a display, a holographic device, or a projector, and a control circuit for controlling the corresponding one of the display, the holographic device, and the projector. The display device 460 can include a touch circuit suitable for detecting a touch or a sensor circuit (e.g., a pressure sensor) suitable for measuring the intensity of a force caused by the touch.

[0135] The audio module 470 can convert sound into an electrical signal and vice versa. The audio module 470 can obtain sound via the input device 450, or output sound via the sound output device 455 or headphones of an external electronic device 402 directly (e.g., wired) or wirelessly coupled to the electronic device 401.

[0136] The sensor module 476 can detect the operating state of the electronic device 401 (e.g., power or temperature) or the environmental state outside the electronic device 401 (e.g., the state of a user), and then generate an electrical signal or a data value corresponding to the detected state. The sensor module 476 can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0137] The interface 477 can support one or more specified protocols for directly (e.g., wired) or wirelessly coupling the electronic device 401 to an external electronic device 402. The interface 477 can include, for example, a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface.

[0138] The connection end 478 may include a connector through which the electronic device 401 can be physically connected to an external electronic device 402. The connection end 478 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headset connector).

[0139] The haptic module 479 may convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that can be recognized by a user via touch or kinesthesia. The haptic module 479 may include, for example, a motor, a piezoelectric element, or an electrical stimulator.

[0140] The camera module 480 may capture still images or moving images. The camera module 480 may include one or more lenses, an image sensor, an image signal processor, or a flash. The power management module 488 may manage the power supplied to the electronic device 401. The power management module 488 may be implemented as at least a part of, for example, a power management integrated circuit (PMIC).

[0141] The battery 489 may supply power to at least one component of the electronic device 401. The battery 489 may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0142] The communication module 490 may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device 401 and an external electronic device (e.g., the electronic device 402, the electronic device 404, or the server 408), and perform communication via the established communication channel. The communication module 490 may include one or more communication processors that can operate independently of the processor 420 (e.g., the AP) and support direct (e.g., wired) communication or wireless communication. The communication module 490 may include a wireless communication module 492 (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 494 (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). Each of these communication modules may communicate with an external electronic device via a first network 498 (e.g., a short-range communication network, such as a standard of Bluetooth TM , Wi-Fi Direct, or Infrared Data Association (IrDA)) or a second network 499 (e.g., a long-range communication network, such as a cellular network, the Internet, or a computer network (e.g., a LAN or a wide area network (WAN))). These various types of communication modules may be implemented as a single component (e.g., a single IC), or may be implemented as multiple components separated from each other (e.g., multiple ICs). The wireless communication module 492 may use user information (e.g., an international mobile subscriber identity (IMSI)) stored in the user identification module 496 to identify and authenticate the electronic device 401 in a communication network such as the first network 498 or the second network 499.

[0143] The antenna module 497 may transmit signals or power to the outside of the electronic device 401 (e.g., an external electronic device) or receive signals or power from the outside of the electronic device 401 (e.g., an external electronic device). The antenna module 497 may include one or more antennas and may select at least one antenna suitable for a communication scheme to be used in a communication network such as the first network 498 or the second network 499, for example, by the communication module 490 (e.g., the wireless communication module 492). Then, signals or power may be transmitted or received between the communication module 490 and an external electronic device via the selected at least one antenna.

[0144] Commands or data may be transmitted or received between the electronic device 401 and an external electronic device 404 via a server 408 coupled to the second network 499. Each of the electronic devices 402 and 404 may be a device of the same type or a different type from the electronic device 401. All or some of the operations to be performed at the electronic device 401 may be performed at one or more of the external electronic devices 402, 404, or the server 408. For example, if the electronic device 401 is to perform a function or service automatically or in response to a request from a user or another device, the electronic device 401 may request one or more external electronic devices to perform at least a part of the function or service instead of performing the function or service itself, or in addition to performing the function or service, the electronic device 401 may request one or more external electronic devices to perform at least a part of the function or service. The one or more external electronic devices that receive the request may perform at least a part of the requested function or service, or an additional function or additional service related to the request, and transmit the result of the performance to the electronic device 401. The electronic device 401 may provide the result, with or without further processing of the result, as at least a part of a reply to the request. For this purpose, for example, cloud computing, distributed computing, or client-server computing techniques may be used.

[0145] Figure 5 A system including a UE 505 and a gNB 510 that communicate with each other is shown. The UE may include a radio 515 and a processing circuit (or a device for processing) 520, which may perform various methods disclosed herein, e.g., Figure 2 the method shown in (). For example, the processing circuit 520 may receive a transmission from a network node (gNB) 510 via the radio 515, and the processing circuit 520 may transmit a signal to the gNB 510 via the radio 515.

[0146] Although embodiments of the present disclosure have been described above with reference to 3GPP Rel-15 and Rel-18, the present disclosure is not limited thereto and can be similarly applied to other communication standards with similar version characteristics.

[0147] Embodiments of the subject matter and operations described in this specification can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this specification and their structural equivalents, or in combinations of one or more of them. Embodiments of the subject matter described in this specification can be implemented as one or more computer programs, i.e., one or more modules of computer program instructions, encoded on a computer storage medium for execution by, or to control the operation of, a data processing apparatus. Optionally or additionally, the program instructions can be encoded on an artificially generated propagated signal (e.g., a machine-generated electrical, optical, or electromagnetic signal) that is generated for encoding information to be transmitted to a suitable receiver apparatus for execution by the data processing apparatus. A computer storage medium can be a computer-readable storage device, a computer-readable storage substrate, a random or serial access memory array or device, or a combination thereof, or be included in a computer-readable storage device, a computer-readable storage substrate, a random or serial access memory array or device, or a combination thereof. Moreover, although a computer storage medium is not a propagated signal, a computer storage medium can be the source or destination of computer program instructions encoded in an artificially generated propagated signal. A computer storage medium can also be one or more separate physical components or media (e.g., multiple CDs, disks, or other storage devices), or be included in one or more separate physical components or media (e.g., multiple CDs, disks, or other storage devices). Additionally, the operations described in this specification can be implemented as operations performed by a data processing apparatus on data stored on one or more computer-readable storage devices or received from other sources.

[0148] Although this specification may contain many specific implementation details, the implementation details should not be construed as limitations on the scope of any claimed subject matter, but rather as descriptions of features specific to particular embodiments. Certain features described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented separately or in any suitable sub-combination in multiple embodiments. Moreover, although the features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excluded from the combination, and the claimed combination can be directed to a sub-combination or a variation of a sub-combination.

[0149] Similarly, although the operations are depicted in the drawings in a particular order, this should not be construed as requiring that the operations be performed in the particular order shown or in sequential order, or that all of the illustrated operations be performed, to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. Additionally, the separation of various system components in the above-described embodiments should not be construed as requiring such separation in all embodiments, and it should be understood that the program components and systems described herein can generally be integrated together in a single software product or packaged into multiple software products.

[0150] Thus, particular embodiments of the subject matter have been described herein. Other embodiments are within the scope of the appended claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired result. In some implementations, multitasking and parallel processing may be advantageous.

[0151] As will be recognized by those of skill in the art, the innovative concepts described herein can be modified and varied in a wide variety of applications. Thus, the scope of the claimed subject matter should not be limited to any of the particular exemplary teachings discussed above, but is defined by the appended claims.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: Sending terminal capability information indicating that the terminal supports the first capability and the second capability to the base station; receiving, from the base station, configuration information based on the terminal capability information, the configuration information including a channel state information (CSI) report configuration; Determining, based on characteristics of the CSI reporting configuration, a capability to use among the first capability and the second capability; receiving a CSI reference signal CSI-RS based on the configuration information; generating a CSI report based on the received CSI-RS according to the used capabilities; as well as Sending the CSI report to the base station.

2. The method according to claim 1, wherein The first capability includes 3rd Generation Partnership Project 3GPP Rel-15 capability, and the second capability includes 3GPP Rel-18 capability.

3. The method according to claim 1, wherein The used capability refers to the following items: the total supported number of CSI report settings, the maximum supported number of simultaneous non-zero power NZP-CSI-RS resources, or the maximum supported number of all CSI-RS ports in the simultaneous NZP-CSI-RS resources.

4. The method according to claim 1, wherein Determining the capability to be used among the first capability and the second capability includes: in response to the CSI report configuration including a CSI report setting having a subconfiguration, determining the second capability as the capability to be used for a bandwidth part BWP.

5. The method according to claim 1, wherein Determining the used capability among the first capability and the second capability includes: in response to the CSI reporting configuration in the active bandwidth part BWP of any component carrier CC including a CSI reporting setting with a subconfiguration, determining the second capability as the used capability.

6. The method according to claim 1, further comprising: For the second capability, non-zero power NZP-CSI-RS resources and CSI-RS ports are counted for CSI reporting settings with and without sub-configuration.

7. The method according to claim 1, further comprising: In response to the configuration information including a CSI reporting setting having sub-configurations corresponding to both type 1 spatial domain adaptation and type 2 spatial domain adaptation, determining a maximum supported number of simultaneous non-zero power NZP-CSI-RS resources or a maximum supported number of all CSI-RS ports in the simultaneous NZP-CSI-RS resources based on a minimum of reported values for type 1 spatial domain adaptation and type 2 spatial domain adaptation.

8. A terminal for use in a wireless communication system, the terminal comprising: transceiver; as well as The processor is configured to: sending, via the transceiver, to a base station terminal capability information indicating that the terminal supports a first capability and a second capability, receiving, via the transceiver, configuration information based on the terminal capability information from the base station, the configuration information including a channel state information (CSI) report configuration; determining, based on characteristics of the CSI reporting configuration, a capability to use between the first capability and the second capability, receiving a CSI reference signal (CSI-RS) via the transceiver based on the configuration information, generating a CSI report based on the received CSI-RS according to the used capabilities, and The CSI report is sent to the base station via the transceiver.

9. The terminal according to claim 8, wherein: The first capability includes 3rd Generation Partnership Project 3GPP Rel-15 capability, and the second capability includes 3GPP Rel-18 capability.

10. The terminal according to claim 8, wherein: The used capability refers to the following: the total supported number of CSI report settings, the maximum supported number of simultaneous non-zero power NZP-CSI-RS resources, or the maximum supported number of all CSI-RS ports in a simultaneous NZP-CSI-RS resource. The terminal according to claim 8 , wherein: The processor is further configured to determine the used capability among the first capability and the second capability by determining the second capability as the used capability for a bandwidth part (BWP) in response to the CSI reporting configuration including a CSI reporting setting with a subconfiguration.

12. The terminal according to claim 8, wherein: The processor is further configured to determine the used capability among the first capability and the second capability by determining the second capability as the used capability in response to the CSI reporting configuration in the active bandwidth part BWP of any component carrier CC including a CSI reporting setting with a subconfiguration.

13. The terminal according to claim 8, wherein: The processor is further configured to, for the second capability, count non-zero power NZP-CSI-RS resources and CSI-RS ports for CSI reporting settings with and without sub-configuration. The terminal according to claim 8 , wherein: The processor is further configured to, in response to the configuration information including a CSI reporting setting having sub-configurations corresponding to both type 1 spatial domain adaptation and type 2 spatial domain adaptation, determine a maximum supported number of simultaneous non-zero power NZP-CSI-RS resources or a maximum supported number of all CSI-RS ports in the simultaneous NZP-CSI-RS resources based on a minimum of reported values for type 1 spatial domain adaptation and type 2 spatial domain adaptation.

15. A method performed by a base station in a wireless communication system, the method comprising: receiving, from the terminal, terminal capability information indicating that the terminal supports a first capability and a second capability; sending configuration information based on the terminal capability information to the terminal, wherein the configuration information includes a channel state information (CSI) report configuration, and wherein characteristics of the CSI report configuration are used by the terminal to identify capabilities to be used in the first capability and the second capability; Sending a CSI reference signal CSI-RS based on the configuration information; and A CSI report is received from the terminal, where the CSI report is generated according to the used capability based on the transmitted CSI-RS.

16. The method according to claim 15, wherein The first capability includes 3rd Generation Partnership Project 3GPP Rel-15 capability, and the second capability includes 3GPP Rel-18 capability.

17. The method according to claim 15, wherein: The used capability refers to the following: the total supported number of CSI report settings, the maximum supported number of simultaneous non-zero power NZP-CSI-RS resources, or the maximum supported number of all CSI-RS ports in a simultaneous NZP-CSI-RS resource.

18. A base station for use in a wireless communication system, the base station comprising: transceiver; as well as The processor is configured to: receiving, via the transceiver, terminal capability information from a terminal indicating that the terminal supports a first capability and a second capability, sending, via the transceiver, configuration information based on the terminal capability information to the terminal, wherein the configuration information includes a channel state information (CSI) report configuration, and wherein characteristics of the CSI report configuration are used by the terminal to identify a capability to be used in the first capability and the second capability, transmitting a CSI reference signal (CSI-RS) via the transceiver based on the configuration information, and A CSI report is received from the terminal via the transceiver, the CSI report being generated according to the used capability based on the transmitted CSI-RS.

19. The base station according to claim 18, wherein: The first capability includes 3rd Generation Partnership Project 3GPP Rel-15 capability, and the second capability includes 3GPP Rel-18 capability.

20. The base station according to claim 18, wherein The used capability refers to the following: the total supported number of CSI report settings, the maximum supported number of simultaneous non-zero power NZP-CSI-RS resources, or the maximum supported number of all CSI-RS ports in a simultaneous NZP-CSI-RS resource.

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