Terminal and measurement method

Abstract

A terminal is provided with: a reception unit that receives, from a base station, channel state information (CSI) report settings to which a plurality of assumptions relating to different spaces are applied; a control unit that performs measurement on the basis of the CSI report setting; and a transmission unit that transmits a CSI report to the base station on the basis of the result of the measurement, and the control unit determines a feedback type to be reported to the base station on the basis of the CSI report setting.

Description

Technical Field

[0001] The present invention relates to a terminal and a measurement method in a wireless communication system. Background Art

[0002] In NR (New Radio) (also called "5G"), which is the successor system to LTE (Long Term Evolution), technologies that meet the requirements of a large-capacity system, high data transmission speed, low latency, simultaneous connection of multiple terminals, low cost, and power saving are being studied (for example, non-patent document 1).

[0003] Furthermore, in Release 18 of 3GPP (registered trademark), in order to achieve environmental sustainability, carbon neutrality, SDGs (Sustainable Development Goals), and reduction in operating costs, the importance of network energy savings and methods for implementing energy savings are being studied (e.g., Non-Patent Document 2).

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 3GPP TS 38.300 V17.3.0 (December 2022)

[0007] Non-Patent Document 2: “New WID: Network energy savings for NR,” RP-223540, 3GPP RAN Meeting #98e, December 2022

[0008] Non-Patent Document 3: 3GPP TS 38.331 V17.3.0 (December 2022)

[0009] Non-Patent Document 4: 3GPP TR 36.897 V13.0.0 (June 2015)

[0010] Non-Patent Document 5: 3GPP TS 38.211 V17.4.0 (December 2022) Summary of the Invention

[0011] Problems to be solved by the invention

[0012] To achieve power savings in networks, research is underway to efficiently adapt the spatial domain elements involved in CSI (Channel State Information) reporting and beam management. However, no specific method has been established.

[0013] The present invention has been made in view of the above-mentioned situation, and an object of the present invention is to efficiently implement CSI (Channel State Information) reporting in a wireless communication system to reduce power consumption on the network side.

[0014] Means for solving problems

[0015] According to the disclosed technology, a terminal is provided, comprising: a receiving unit that receives a CSI (Channel state information) report setting from a base station, wherein the CSI report setting applies multiple assumptions related to different spaces; a control unit that performs measurements based on the CSI report setting; and a sending unit that sends a CSI report to the base station based on a result of the measurement, wherein the control unit determines a feedback type to be reported to the base station based on the CSI report setting.

[0016] Effects of the Invention

[0017] According to the disclosed technology, in a wireless communication system, CSI (Channel State Information) reporting can be efficiently implemented to reduce power consumption on the network side. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A diagram showing a configuration example of a wireless communication system.

[0019] Figure 2 This is a diagram for illustrating an example of settings related to CSI reporting.

[0020] Figure 3 This is a diagram for explaining example (1) of the antenna OFF mode.

[0021] Figure 4 This is a diagram for explaining example (2) of the antenna off mode.

[0022] Figure 5 This is a diagram for explaining example (3) of the antenna off mode.

[0023] Figure 6 This is a diagram for explaining example (1) of configuration related to multiple CSI reports.

[0024] Figure 7This is a diagram for explaining example (2) of the configuration related to multiple CSI reports.

[0025] Figure 8 This is a diagram for explaining an example of a configuration related to triggering for multiple CSI reports according to an embodiment of the present invention.

[0026] Figure 9 This is a diagram for explaining example (1) of configuration related to feedback types for multiple CSI reports according to an embodiment of the present invention.

[0027] Figure 10 This is a diagram for explaining example (2) of configuration related to feedback types for multiple CSI reports according to an embodiment of the present invention.

[0028] Figure 11 This is a diagram for explaining example (3) of the configuration related to feedback types for multiple CSI reports according to an embodiment of the present invention.

[0029] Figure 12 This is a diagram for explaining example (1) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0030] Figure 13 This is a diagram for explaining example (2) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0031] Figure 14 This is a diagram for explaining example (3) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0032] Figure 15 This is a diagram for explaining example (4) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0033] Figure 16 This is a diagram for explaining example (5) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0034] Figure 17 This is a diagram for explaining example (6) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0035] Figure 18 This is a diagram for explaining an example (7) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0036] Figure 19 This is a diagram for explaining an example (8) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0037] Figure 20 This is a diagram for explaining an example (9) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0038] Figure 21 This is a diagram for explaining example (1) of configuration related to codebooks for multiple CSI reports according to an embodiment of the present invention.

[0039] Figure 22 This is a diagram for explaining example (2) of configuration related to codebooks for multiple CSI reports according to an embodiment of the present invention.

[0040] Figure 23 This is a diagram for explaining example (3) of configuration related to codebooks for multiple CSI reports according to an embodiment of the present invention.

[0041] Figure 24 This is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention.

[0042] Figure 25 This is a diagram showing an example of the functional configuration of the terminal 20 according to the embodiment of the present invention.

[0043] Figure 26 This is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 according to the embodiment of the present invention.

[0044] Figure 27 1 is a diagram showing an example of the structure of a vehicle 2001 in the embodiment of the present invention. DETAILED DESCRIPTION

[0045] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the embodiment described below is merely an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0046] In the operation of the wireless communication system according to the embodiments of the present invention, existing technologies are appropriately utilized. Examples of such existing technologies include, but are not limited to, existing LTE. Furthermore, unless otherwise specified, the term "LTE" used in this specification has a broad meaning encompassing LTE-Advanced and subsequent technologies (e.g., NR).

[0047] In the embodiments of the present invention described below, terms such as SS (Synchronization Signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical Broadcast Channel), PRACH (Physical Random Access Channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), used in existing LTE, are used. These terms are for convenience; equivalent signals and functions may be referred to by other names. Furthermore, the aforementioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, and NR-PRACH. However, even signals used in NR are not necessarily explicitly referred to as "NR-."

[0048] Furthermore, in the embodiments of the present invention, the duplexing scheme may be a TDD (Time Division Duplex) scheme, an FDD (Frequency Division Duplex) scheme, or other schemes (eg, Flexible Duplex, etc.).

[0049] Furthermore, in the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station 10 or the terminal 20 .

[0050] Figure 1 1 is a diagram showing a configuration example (1) of a wireless communication system in an embodiment of the present invention. Figure 1 As shown, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20. Figure 1 In the figure, one base station 10 and one terminal 20 are shown, but this is only an example, and there may be multiple base stations and terminals.

[0051] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by the time domain and the frequency domain. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or the number of resource blocks. The base station 10 sends synchronization signals and system information to the terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is sent, for example, through NR-PBCH, also called broadcast information. The synchronization signal and system information may also be referred to as SSB (SS / PBCH block). As Figure 1 As shown, the base station 10 sends a control signal or data to the terminal 20 via DL (Downlink) and receives a control signal or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output)-based communications to DL or UL. In addition, the base station 10 and the terminal 20 can also communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) based on CA (Carrier Aggregation). Furthermore, the terminal 20 can also communicate via the primary cell of the base station 10 and the primary and secondary cell group cells (PSCell: Primary SCG Cell) of other base stations 10 based on DC (Dual Connectivity).

[0052] The terminal 20 is a communication device having a wireless communication function, such as a smartphone, a mobile phone, a tablet computer, a wearable terminal, or an M2M (Machine-to-Machine) communication module. Figure 1 As shown, terminal 20 receives control signals or data from base station 10 via DL and transmits control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Furthermore, terminal 20 receives various reference signals transmitted from base station 10 and measures propagation path quality based on the reception results of these reference signals.

[0053] Terminal 20 can perform carrier aggregation, which bundles multiple cells (multiple CCs) to communicate with base station 10. Carrier aggregation uses one PCell (Primary Cell) and one or more SCells (Secondary Cells). Alternatively, a PUCCH-SCell with a PUCCH can be used.

[0054] To achieve power savings in the network, research is underway to efficiently adapt the spatial domain elements involved in CSI (Channel State Information) reporting and beam management. Furthermore, research is underway to efficiently adapt the power offset between the PDSCH and CSI-RS in conjunction with CSI reporting.

[0055] Figure 2 This is a diagram for explaining an example of configuration related to CSI reporting. The terminal 20 can configure the following information 1) and 2) for CSI measurement and the base station 10 can configure the following information 1) and 2) for CSI measurement.

[0056] 1) Reporting setting. The corresponding information element may be CSI-ReportConfig (see Non-Patent Document 3). Reporting setting is information that instructs the terminal 20 on how to perform reporting.

[0057] 2) Resource setting. The corresponding information element may be CSI-ResourceConfig. Resource setting is information that notifies the terminal 20 of the CSI-RS / SSB resource set used for CSI / L1-RSRP measurement.

[0058] For example, Figure 2 As shown, periodic CSI reports, semi-persistent CSI reports, and aperiodic CSI reports can be configured. CSI-ReportConfig specifies CSI-ResourceConfig in a one-to-one manner. CSI-ReportConfig includes CodebookConfig, which includes nrOfAntennaPorts, typeI-SinglePanel-ri-Restriction, and ri-Restriction.

[0059] like Figure 2As shown, CSI-ResourceConfig specifies CSI resource sets using a 1-to-S approach. Examples of CSI resource sets include NZP-CSI-RS-ResourceSet, CSI-SSB-ResourceSet, or CSI-IM_ResourceSet. All CSI-RS resources included in a CSI resource set are assigned the same number of ports. Alternatively, only one CSI resource set can be configured as a CMR (Channel Measurement Resource).

[0060] like Figure 2 As shown, a CSI resource set specifies CSI resources using a one-to-one list. CSI resources are, for example, NZP-CSI-RS-Resource, SSB-Index, or CSI-IM-Resource. CSI-RS-ResourceMapping, which includes the power offset between PDSCH and CSI-RS and the number of ports, is included in NZP-CSI-RS-Resource.

[0061] As described above, the number of CSI-RS ports for CSI reporting is explicitly notified via NZP-CSI-RS-Resource and CodebookConfig included in CSI-ReportConfig. The power offset between PDSCH and CSI-RS is notified via powerControlOffset included in NZP-CSI-RS-Resource.

[0062] Next, we'll explain the antenna OFF mode. The mapping between TxRUs (Transceiver Units) and antennas, as well as the antenna OFF mode, are specified (see Non-Patent Document 4). A sub-array antenna corresponds to multiple antennas connected to a single TxRU. In a sub-array antenna, antennas connected to different TxRUs are separated. In a fully connected array, all TxRUs are connected to all antennas.

[0063] Figure 3 This is a diagram for explaining example (1) of the antenna off mode. Figure 3 is an example of pattern 1-1 in the subarray. Figure 3 As shown in Figure 2, several antennas in each subarray are turned off. The number of ports remains unchanged, but the beamforming gain is reduced.

[0064] Figure 4This is a diagram for explaining example (2) of the antenna off mode. Figure 4 is an example of pattern 1-2 in the subarray. Figure 4 As shown in Figure 2, all antennas in the subarray are turned off. The number of ports is reduced, but the beamforming gain does not change.

[0065] Figure 5 This is a diagram for explaining example (3) of the antenna off mode. Figure 5 is an example of fully connected array mode 2. Figure 5 As shown, a portion of the antenna is turned off. The number of ports remains unchanged, but the beamforming gain is reduced.

[0066] Here, regarding antenna adaptation in the spatial domain and power adaptation in the power domain, since the base station 10 makes decisions regarding adaptation, it is assumed that a plurality of CSIs based on different antennas and different power assumptions are reported to the base station 10 .

[0067] Figure 6 This is a diagram for explaining example (1) of the configuration related to multiple CSI reports. Figure 6 As shown, multiple CSIs are reported for multiple states of antenna off or power reduction in mode 1-1 of the measurement subarray antenna.

[0068] Figure 7 This is a diagram for explaining example (2) of the configuration related to multiple CSI reports. Figure 7 As shown, by shutting down the antenna in mode 1-2 of the subarray antenna, a plurality of CSIs of a plurality of states of the port whose measurement is cut off are reported.

[0069] In conventional CSI configuration and reporting in which one configuration and one report are performed, when multiple CSI reports are executed, there are problems 1) to 3) shown below, for example.

[0070] 1) When the base station 10 creates a plurality of CSI report configurations in which most of the information is duplicated, the complexity of configuration creation in the base station 10 increases, and the payload of notification increases.

[0071] 2) The complexity of the terminal 20 increases through multiple measurement processes for multiple CSI reports.

[0072] 3) When multiple CSI reports are performed independently, the payload of CSI feedback increases.

[0073] Therefore, in order to report multiple CSIs assuming different spaces and / or powers, the reporting process of multiple CSIs may be enhanced as shown in the following actions 1) to 4).

[0074] Action 1) Trigger multiple CSI reports. For example, decide which spatial and / or power assumptions to measure and report.

[0075] Action 2) Set the feedback type (feedback quantity) for multiple CSI reports. For example, to reduce the overhead associated with CSI reporting, determine which settings are common and which settings are independent.

[0076] Action 3) Perform RS resource configuration and measurement for multiple CSI reports. For example, determine how the terminal 20 obtains CSI resource configurations that apply different port assumptions.

[0077] Action 4) Determine codebook configurations for multiple CSI reports. For example, determine how the terminal 20 acquires multiple codebook configurations to which different port configurations are applied.

[0078] For example, the above actions 1), 2), 3), and 4) may be used in multiple CSI reports related to multiple spatial hypotheses. In addition, the above actions 1) and 2) may also be used in multiple CSI reports related to multiple power hypotheses.

[0079] Next, operation 1) will be described.

[0080] Multiple CSI reports corresponding to different spatial and / or power-related assumptions may also be triggered. The base station 10 may also include multiple spatial and power-related assumptions in a single CSI reporting configuration for multiple CSI reports.

[0081] Regarding the assumptions related to space, some or all of 1) to 3) shown below may be included.

[0082] 1) The number of activated ports or coefficients, or the number of activated TxRUs or coefficients. Applicable to antenna off modes 1 and 2. For example, if the coefficient is 0.25, the number of activated ports is 0.25 × (the total number of configured ports).

[0083] 2) Activated or valid port index. Applicable to antenna off modes 1-2. For example, if there are 8 ports in total, when port index {0, 1, 2, 3} is valid, port index {4, 5, 6, 7} is invalid or off.

[0084] 3) Port or TxRU-antenna mapping pattern. For example, the number of active antennas per port or TxRU, or the activation coefficient for the number of antennas per port or TxRU. This applies to antenna shutdown modes 1-1 and 2. For example, if the coefficient is 0.25, the number of active antennas per port or TxRU is 0.25 × (the number of antennas configured for each port or TxRU).

[0085] The power-related assumptions may include part or all of 1) to 3) shown below.

[0086] 1) The power or PSD (power spectrum density) level of the resource elements (REs) of the PDSCH and / or CSI-RS.

[0087] 2) The power or PSD offset between the REs of PDSCH and CSI-RS.

[0088] 3) An additional offset to the existing offset of the power or PSD between PDSCH and CSI-RS REs, for example, an additional offset to the powerControlOffset included in the NZP-CSI-Resource.

[0089] The spatial and power-related assumptions can be reported separately or jointly. One assumption can correspond to one CSI report. Tables 1 and 2 show examples of reporting spatial and power-related assumptions jointly.

[0090] [Table 1]

[0091]

[0092] [Table 2]

[0093]

[0094] As shown in Table 1, one hypothetical index may be associated with the index of the activated port and the additional power offset and reported to the terminal 20 .

[0095] As shown in Table 2, one hypothesis index may be associated with the number of ports, the coefficient of the activated antenna for each port, and the additional power offset, and then reported to the terminal 20 .

[0096] Assumptions related to space and / or power can be informed by the methods 1)-3) shown below.

[0097] 1) Notification may be performed only through RRC (Radio Resource Control) signaling, only through MAC-CE (Medium Access Control-Control Element), or only through DCI (Downlink Control Information). Figure 8 This is a diagram for explaining an example of a trigger configuration for multiple CSI reports according to an embodiment of the present invention. Figure 8 The hypothetical index of the upper table in is notified to the terminal 20 through RRC signaling, and the terminal 20 can perform measurement and CSI reporting based on the number of ports and additional power offset corresponding to the hypothetical index. In addition, the DCI can be UE-specific DCI or UE group DCI.

[0098] 2) It is also possible to set the candidate through RRC signaling and select the hypothesis index through MAC-CE and / or DCI. For example, it is possible to set the candidate through RRC signaling. Figure 8 The upper table in the table is notified via MAC-CE and / or DCI of the hypothetical index or bitmap of the hypothetical index. For example, if the bitmap "1011" is notified, three CSIs corresponding to the hypothetical indices {0, 2, 3} can be reported. For example, if index #2 is notified, the CSI corresponding to the hypothetical index 2 can be reported.

[0099] In addition, for example, it is also possible to set the Figure 8 The upper table in the table specifies candidates for specific spatial and / or power-related hypotheses via MAC-CE and / or DCI. For example, if the number of ports is notified by MAC-CE and / or DCI, the CSI for the spatial and / or power-related hypotheses corresponding to port number 4 in the table may be reported. That is, the CSI corresponding to hypothesis index 2 may be reported. For example, if the number of ports is notified by MAC-CE and / or DCI, the CSI for spatial and / or power-related hypotheses corresponding to port numbers less than 4 in the table may also be reported. That is, the CSI corresponding to hypothesis indices 2 and 3 may be reported.

[0100] 3) It can also be RRC signaling, or RRC signaling and MAC-CE setting candidates and candidate combinations, MAC-CE or DCI notification combination index. For example, RRC signaling can set Figure 8 The upper table and the lower table, MAC-CE and / or DCI specify the combined index of the lower table. In addition, for example, RRC signaling can set Figure 8 In the upper table, MAC-CE can be set Figure 8The DCI may specify a combination index of the lower table. As described above, the hypothesis index includes one or more hypotheses in the reported hypothesis, which are specified by the reporting combination index.

[0101] In addition, when a CSI report is set as described above and the RS resources (e.g., CSI-RS resources) or settings (e.g., codebooks) do not support the CSI report, the terminal 20 may discard or ignore the CSI report, or may perform a report of, for example, the most recently set CSI measurement without updating the CSI report.

[0102] Furthermore, the aforementioned multiple CSI reports may have the following action attributes in the time domain. For example, the aforementioned multiple CSI reports may be applied to only one of periodic, semi-persistent, and aperiodic reporting. For example, the aforementioned multiple CSI reports may be applied to all of periodic, semi-persistent, and aperiodic reporting. For example, the aforementioned multiple CSI reports may be applied periodically, semi-persistently, and aperiodically.

[0103] In addition, the UE capabilities shown below may also be reported from the terminal 20 to the base station 10 .

[0104] Indicates the UE capability of supporting multiple CSI reports. Indicates the UE capability of the maximum number of CSI reports that can be configured through a single CSI report configuration (e.g., CSI-ReportConfig). Indicates the UE capability of the maximum number of CSI report configurations (e.g., CSI-ReportConfig) when multiple CSI reports are enhanced. Indicates the UE capability of the supported spatial and / or power-related assumptions. For example, spatial and / or power-related assumptions may include the number of antenna ports to be pruned, the number of ports to be pruned, the power level to be pruned, spatial and temporal migration times, etc.

[0105] In addition, the notification indicating whether to activate multiple CSI reports may also be sent from the base station 10 to the terminal 20 through RRC signaling, MAC-CE, or DCI.

[0106] Through the above-mentioned action 1), the base station 10 can efficiently trigger CSI reports corresponding to multiple spatial and / or power hypotheses for the terminal 20.

[0107] Next, operation 2) will be described.

[0108] One or more CSI types (CSI quantities) including CRI (CSI-RS Resource Index) (beam), RI (Rank indicator), PMI (Precoding matrix indicator), CQI (Channel quality indicator), and LI (Layer indicator) (Best Layer) can be reported using the reportQuantity information element contained in CSI-ReportConfig.

[0109] Figure 9 This is a diagram for explaining an example (1) of a setting related to feedback types for multiple CSI reports according to an embodiment of the present invention. Figure 9 As shown, for example, cri-RI-PMI-CQI, cri-RI-i1, cri-RI-i1-CQI, cri-RI-CQI, cri-RSRP, etc. can be set in reportQuantity.

[0110] For multiple CSI reports, some CSI values ​​may be common across different reports or different assumptions. By eliminating duplicate reports, the report payload size can be reduced. For example, across multiple CSI reports assuming different power levels, the CRI, RI, and PMI may be common, but the CQI may not be common, i.e., the CQI may be different when assuming different power levels. For example, across multiple CSI reports assuming different numbers of ports, the CRI, RI, PMI, and CQI may not be common, i.e., the CRI, RI, PMI, and CQI may be different when assuming different numbers of ports.

[0111] Action 2-1) The multiple CSI reports configured as shown in 1) or 2) below may use the same or different reportQuantity settings to notify the reported CSI type.

[0112] 1) The same reportQuantity setting can be used. For example, only one reportQuantity can be set within CSI-ReportConfig. Terminal 20 can report one or more CSI types indicated by reportQuantity for multiple CSI reports configured based on different spatial and / or power-related assumptions. For example, if cri-RI-PMI-CQI is configured for reportQuantity, Terminal 20 can report CRI, RI, PMI, and CQI for multiple CSI reports configured based on different spatial and / or power-related assumptions.

[0113] 2) Different spatial and / or power related assumptions can use different reportQuantity settings. Figure 10 This is a diagram for explaining example (2) of configuration related to feedback types for multiple CSI reports according to an embodiment of the present invention.

[0114] For example, first, Figure 10 As shown, the base station 10 sets multiple reportQuantity settings or sets a reportQuantity list. Then, the base station 10 maps a reportQuantity to a specific CSI report or a specific spatial and / or power-related hypothesis. Figure 10 In the example, reportQuantityId is mapped to a hypothetical index that assumes the number of ports and appends an offset.

[0115] reportQuantity-r18, reportQuantityList-r18, and reportQuantityId may be newly defined. The maximum number of reportQuantity-r18 included in reportQuantityList-r18 may be predefined or set based on UE capabilities.

[0116] The mapping between reportQuantity and a CSI report or spatial and / or power-related assumptions can be a) or b) as shown below.

[0117] a) Mapping can be performed between reportQuantity and CSI reports or spatial and / or power-related hypotheses according to the order of reportQuantity (eg, the order included in the reportQuantity list).

[0118] b) The mapping can be explicitly notified through RRC signaling, MAC-CE or DCI. For example, the reportQuantityId or the index of the reportQuantity in the reportQuantity list can be notified. Figure 10 Notification is performed in the manner shown for QuantityID#1.

[0119] Action 2-2) Base station 10 may notify terminal 20 of whether one or more CSI values ​​are independent or common across multiple CSI reports or reported hypotheses related to multiple spatial and / or power conditions. For example, regarding reports where CSI values ​​are independent or common, actions may be performed as described in 1) or 2) below.

[0120] 1) Independent CSI values ​​can be applied to multiple CSI reports or multiple spatial and / or power-related hypotheses. For example, when cri-RI-PMI-CQI is set to hypothesis index #1 and hypothesis index #2, CRI, RI, PMI, and CQI can be reported independently for each hypothesis.

[0121] 2) Some CSI values ​​may be commonly applied to multiple CSI reports or multiple spatial and / or power-related hypotheses. All CSI types may be reported to the selected CSI report or spatial and / or power-related hypothesis, while only some CSI types may be reported to other unselected CSI reports or spatial and / or power-related hypotheses. Terminal 20 may also derive independent CSI types for other CSI reports or spatial and / or power-related hypotheses based on the common CSI type in the selected CSI report or spatial and / or power-related hypothesis.

[0122] For example, when cri-RI-PMI-CQI is set to hypothesis index #1 and hypothesis index #2, CRI, RI, PMI, and CQI may be reported for hypothesis index #1, while only CQI may be reported for hypothesis index #2, omitting CRI, RI, and PMI. For hypothesis index #2, the CRI, RI, and PMI of hypothesis index #1 may be reused. Terminal 20 may derive the CQI for hypothesis index #2 based on the CRI, RI, and PMI of hypothesis index #1.

[0123] Furthermore, the assumptions regarding reporting all CSI types, selected CSI reporting, or spatial and / or power-related assumptions may be determined as shown in 1) to 3) below.

[0124] 1) Explicit notification can be performed. For example, an index or bitmap can be used to indicate which of all CSI reports or which of the spatial and / or power-related hypotheses should be selected.

[0125] 2) It can be determined based on the order in which CSI reports or assumptions related to space and / or power are set. For example, it can be based on Figure 8 The order of the tables shown, i.e. the order of the hypothesis indices or report combination indices, may be determined, for example, by setting the CSI report or the hypothesis related to space and / or power to index #0 in the first row.

[0126] 3) The decision may be based on the index of the CSI report or the hypothesis related to space and / or power. For example, the decision may be based on the CSI report or the hypothesis related to space and / or power corresponding to the minimum or maximum index.

[0127] The base station 10 may notify the terminal 20 of the mode indicating whether the CSI values ​​are independent or common through RRC signaling, MAC-CE, or DCI. For example, the notification may be performed as shown in 1) or 2) below.

[0128] 1) Figure 11 This is a diagram for explaining an example (3) of the configuration related to feedback types for multiple CSI reports according to an embodiment of the present invention. Figure 11 As shown, a new CSI type can be defined for reportQuantity. For example, cri-RI-PMI-Common-CQI-r18 can mean that CRI, RI, and PMI are common, and CQI is independent. For example, cri-RI-PMI-CQI-r18 can mean that there is no common CSI type, and CRI, RI, PMI, and CQI are independent. For example, cri-RI-PMI-CQI-Common-r18 can mean that CRI, RI, PMI, and CQI are common, and there is no independent CSI type.

[0129] 2) As shown in Table 3, an indicator for defining a reporting mode may be newly defined.

[0130] [Table 3]

[0131]

[0132] For example, when mode 4 in Table 3 is set and cri-RI-PMI-CQI is set in both assumptions #1 and #2, CRI, RI, and PMI may be reported jointly, and CQI may be reported independently in both assumptions #1 and #2. For example, when mode 4 in Table 3 is set and cri-RI-CQI is set for both assumptions #1 and #2, CRI and RI may be reported jointly, and CQI may be reported independently in both assumptions #1 and #2.

[0133] Through the above-mentioned action 2), the feedback amount in multiple CSI reports can be efficiently set.

[0134] Next, action 3) will be described.

[0135] In the past, for traditional CSI reporting that measures CSI-RS, only one NZP-CSI-RS-ResourceSet was configured for channel measurement in a CSI report. All NZP-CSI-RS-Resources included in the NZP-CSI-RS-ResourceSet had the same number of ports.

[0136] Therefore, regarding RS resource configuration and measurement for multiple CSI reports, operations may be performed as in the following operations 3-1) to 3-3).

[0137] Action 3-1) Using conventional RS resource configuration, the terminal 20 may estimate all channels of the configured resources and derive one or more CSIs through one or more spatially related assumptions based on the notification from the base station 10 .

[0138] Action 3-2) Using conventional RS resource settings, the terminal 20 may derive RS resources from the base station based on assumptions related to one or more spaces, and measure the derived resources to perform CSI reporting.

[0139] Action 3-3) An enhanced RS resource setting, ie, one or more RS resources to which different spatial assumptions are applied to one CSI report setting may also be set.

[0140] Figure 12 This is a diagram for explaining example (1) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 12 (A) shows resource settings and measurements related to conventional CSI reporting. Figure 12 The illustrated (B) corresponds to the above-mentioned operation 3-1), and the antenna reduction is set at the stage of channel estimation. Figure 12 The illustrated (C) corresponds to the above-mentioned operation 3-2), and antenna reduction is set at the RS resource stage. Figure 12 The illustrated (D) corresponds to the above-mentioned action 3-3), in which, during the configuration stage of the base station 10 , antenna reduction is configured in the RS resources through one CSI report configuration.

[0141] The above operation 3) is used for CSI reporting that applies assumptions related to multiple spaces. An antenna-off mode that applies assumptions related to different spaces may also be supported as follows.

[0142] Action 3-1) supports Antenna Off Mode 1-2, which is characterized by lower accuracy and less complexity. Action 3-2) supports Antenna Off Mode 1-2, which is characterized by higher accuracy and greater complexity. Action 3-3) supports Antenna Off Mode 1-1, Antenna Off Mode 1-2, and Antenna Off Mode 1-3, which are characterized by the highest flexibility, highest accuracy, and greatest complexity.

[0143] The following step 3-1) will be described. Using conventional RS resource configuration, terminal 20 can estimate all channels of the configured resources and, based on notifications from base station 10, derive one or more CSIs using assumptions related to one or more spaces. Alternatively, the assumptions related to these spaces can be derived using the following steps.

[0144] Action 3-1-1) The base station 10 may notify the index of valid or invalid ports, or may notify the configured port mode. For example, when RS resources for eight ports indexed #0 to #7 are configured, the base station 10 may notify the port indices {0, 1, 2, 3} that are valid for antenna reduction. Based on this notification, the terminal 20 may extract the channels of ports 0, 1, 2, and 3 from the eight-port RS and derive four-port CSI. Furthermore, for example, when RS resources for eight ports indexed #0 to #7 are configured, the base station 10 may notify the modes #1 and #2 shown in Table 4 for antenna reduction. The terminal 20 may also derive four-port CSI by extracting the channels corresponding to ports 0, 2, 4, and 6 from the eight-port RS, and two-port CSI by extracting the channels corresponding to ports 0 and 5 from the eight-port RS.

[0145] [Table 4]

[0146]

[0147] Action 3-1-2) Base station 10 may also notify the number of antenna ports to be reduced or the index of the number of ports. For example, if RS resources with 8 ports indexed #0 to #7 are configured, base station 10 notifies the number of ports indexed #1 and #2 shown in Table 5 to reduce the number of antennas. Terminal 20 can then derive 4-port CSI for the channels corresponding to ports 0, 1, 2, and 3 extracted from the 8-port RS, and 2-port CSI for the channels corresponding to ports 0 and 5 extracted from the 8-port RS.

[0148] [Table 5]

[0149]

[0150] Action 3-1-3) Base station 10 may also notify the minimum number of ports to be reduced or the index of the number of ports. Terminal 20 may also derive CSI for the number of ports from the minimum number of ports to the number of ports for the configured resources. For example, if RS resources with 8 ports indexed #0 to #7 are configured, and base station 10 notifies the number of ports indexed #2 shown in Table 5 to reduce antennas, terminal 20 may derive the 2-port CSI corresponding to index #2, the 4-port CSI corresponding to index #1, and the 8-port CSI corresponding to index #0.

[0151] The above-mentioned notification from the base station 10 may be performed via RRC signaling, MAC-CE, or group or UE-specific DCI.

[0152] Action 3-2) will be described below. Using conventional RS resource configuration, the terminal 20 may derive RS resources from a base station based on an assumption related to one or more spaces, and measure the derived resources to perform CSI reporting.

[0153] Terminal 20 may also derive CSI-RS resources for the reduced number of ports as shown below. This reduced number of CSI-RS resources may be derived based on the CSI-RS configuration (CDM size, number of CDM groups, location, etc.) in existing specifications, or may be derived based on CSI-RS configurations not included in existing specifications.

[0154] Action 3-2-1) Reduce the size of the CDM.

[0155] Action 3-2-2) Reduce the number of CDM groups.

[0156] Action 3-2-3) Combine the reduction of CDM size and the reduction of the number of CDM groups.

[0157] Action 3-2-3-1) First reduce the CDM size to a predefined size (e.g., noCDM or fd-CDM2), and second reduce the number of CDM groups.

[0158] Step 3-2-3-2) First reduce the number of CDM groups to a predefined size (e.g. 1 or 2 groups), and then reduce the CDM size.

[0159] Action 3-2-3-3) Predefine possible port reduction methods.

[0160] Figure 13 This is a diagram for explaining example (2) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Table 6 shows an example of CSI-RS configuration (see Non-Patent Document 5).

[0161] Figure 13This is an example of setting the CSI-RS resource in Row 18 of Table 6. It is a CDM size of 8-FD2-TD4, 4 CDM groups, and 32 CSI-RS ports. According to the CDM size of 8 × the number of CDM groups of 4, 32 ports are set. In addition, regarding the CDM type (see Non-Patent Document 3), Figure 13 NoCDM, fd-CDM2, CDM4-FD2-TD2, and CDM8-FD2-TD4 are defined as shown.

[0162] [Table 6]

[0163]

[0164] Figure 14 This is a diagram for explaining example (3) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 14 This corresponds to action 3-2-1) above, and is an example of reducing the CDM size by, for example, moving from port 32 to port 16, then port 8, and finally port 4. Reducing from 32 ports to 16 ports, and from 16 ports to 8 ports, reduces the CDM size within the CDM group by reducing the number of symbols. Reducing from 8 ports to 4 ports reduces the CDM size within the CDM group by reducing the number of subcarriers.

[0165] Figure 15 This is a diagram for explaining example (4) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 15 Corresponding to the above action 3-2-2), for example, the number of CDM groups is reduced by changing from port 32 to port 16 and port 8. Figure 15 As shown, k0, k1, k2, and k3 are the starting subcarrier indexes of the CDM group. When there are 16 ports, k2 and k3 are cut off, and when there are 8 ports, k1, k2, and k3 are cut off.

[0166] Figure 16 This is a diagram for explaining example (5) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 16 This is an example of first reducing the CDM size to fd-CDM2 and then reducing the number of CDM groups, corresponding to the above action 3-2-3-1). Figure 16 As shown, the 32-port configuration is cdm8-FD2-TD4, with four groups. By reducing the CDM size, the 16-port configuration becomes cdm4-FD2-TD2, with four groups. Furthermore, by reducing the CDM size, the 8-port configuration becomes fd-CDM2, with four groups. Further reducing the number of CDM groups, the 4-port configuration becomes fd-CDM2, with two groups.

[0167] Action 3-3) will be described below. As an enhanced RS resource configuration, one or more RS resources may be configured to apply assumptions related to different spaces to one CSI report configuration.

[0168] The terminal 20 can measure NZP-CSI-RS-Resources to which an assumption related to a specific space is applied based on UE capabilities and / or notification from the base station 10. The base station 10 can also configure RS resources to which an assumption related to one or more spaces is applied as follows.

[0169] Action 3-3-1) NZP-CSI-RS-Resources can be set for different CSI-RS ports. In other words, nrofPorts can be set for one NZP-CSI-RS-ResourceSet.

[0170] As the CSI-RS port, a subset of all CSI-RS ports defined in the specification may also be supported. All CSI-RS ports defined in the specification may be 1 port, 2 ports, 4 ports, 8 ports, 16 ports, or 32 ports.

[0171] The maximum number of different NZP-CSI-RS-Resource port numbers and the allowed number of NZP-CSI-RS-Resource ports within an NZP-CSI-RS-ResourceSet can be predefined or set based on UE capabilities. For example, an NZP-CSI-RS-ResourceSet can support a maximum of 2 ports, 4 ports, or 8 ports based on UE capabilities.

[0172] Action 3-3-2) In the CSI resource configuration, more than one resource set corresponding to different spatial assumptions of gNBs may be configured.

[0173] CSI resource configuration may refer to channel and / or interference measurement-oriented resources, for example, resourcesForChannelMeasurement, csi-IM-ResourcesForInterference, and nzp-CSI-RS-ResourcesForInterference.

[0174] Figure 17 This is a diagram for explaining example (6) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0175] To set more than 1 resource set, you can Figure 17The values ​​of the solid underlined portion shown are set to be greater than 1 for multiple CSI reports. This value can be set based on notification from the base station 10 and / or UE capabilities. In other words, the values ​​of 1) to 3) shown below can also be set to be greater than 1.

[0176] 1) maxNrofNZP-CSI-RS-ResourceSetsPerConfig for the nzp-CSI-RS-ResourceSetList contained in the CSI-ResourceConfig

[0177] 2) maxNrofCSI-SSB-ResourceSetsPerConfig for the csi-SSB-ResourceSetList contained in CSI-ResourceConfig

[0178] 3) maxNrofCSI-IM-ResourceSetsPerConfig for the csi-IM-ResourceSetList contained in CSI-ResourceConfig

[0179] In addition, to set more than 1 resource set, you can also Figure 17 As shown in the dashed underline, an extended resource set or resource set list is included in the resource configuration for channel and / or interference measurement. An extended resource set may include one or more CSI resources for which spatial assumptions related to a gNB are applied. When an extended resource set list is configured, the maximum number of resource sets in the list may be set based on notification from base station 10 and / or UE capabilities.

[0180] like Figure 17 As shown, the extended resource set can be nzp-CSI-RS-ResourceSetExt-r18, csi-SSB-ResourceSetExt-r18, etc. The extended resource set list can be nzp-CSI-RS-ResourceSetListExt-r18 and the maximum number of elements maxNrofNZP-CSI-RS-ResourceSetsExtPerConfig, csi-SSB-ResourceSetListExt-r18 and the maximum number of elements maxNrofCSI-SSB-ResourceSetsExtPerConfig, etc.

[0181] Action 3-3-3) A resource configuration exceeding 1 may be configured for channel and / or interference measurement in the CSI report configuration (CSI-Report Config).

[0182] Figure 18 This is a diagram for explaining an example (7) of a configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 18 As shown, extended resource settings can be defined for channel and / or interference measurements. An extended resource setting may include one or more CSI resources applying a spatial assumption of a gNB. Figure 18 As shown, the extended resource settings can be resourcesForChannelMeasurementExt-r18, csi-IM-ResourcesForInterferenceExt-r18, nzp-CSI-RS-ResourcesForInterferenceExt-r18, etc.

[0183] Figure 19 This is a diagram for explaining an example (8) of a configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 19 As shown, a resource setting list can be defined for channel and / or interference measurements. The maximum number of resource settings included in the list can be set based on the notification from the base station 10 and / or the UE capability. It is also possible to define extended resource settings for channel and / or interference measurements. Figure 19 As shown, the resource setting list can be resourcesForChannelMeasurementList-r18 and the maximum number of elements maxNrofResourcesForChannelMeasurement, csi-IM-ResourcesForInterferenceList-r18 and the maximum number of elements maxNrofCsi-IM-ResourcesForInterference, nzp-CSI-RS-ResourcesForInterferenceList-r18 and the maximum number of elements maxNrofNzp-CSI-RS-ResourcesForInterference.

[0184] Figure 20 This is a diagram for explaining an example (9) of configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 20 (A) shown is a resource setting of a conventional CSI report using an assumption related to one space. Figure 20 (B) shown is a resource configuration of a CSI report corresponding to action 3-3-1) applying the assumption regarding multiple spaces, and multiple ports are introduced into NZP-CSI-RS-ResourceSet. Figure 20(C) shown is a resource configuration for a CSI report corresponding to operation 3-3-2) in which an assumption regarding multiple spaces is applied, and more than one resource set is introduced into the CSI resource configuration. Figure 20 (D) shown is a resource configuration of a CSI report corresponding to operation 3-3-3) in which an assumption related to multiple spaces is applied, and more than one resource set is introduced in channel measurement.

[0185] Through the above-mentioned action 3), the resources measured in multiple CSI reports can be efficiently set.

[0186] Operation 4) is described below. Codebook configurations for multiple CSI reports are determined. For example, the configuration of how the terminal 20 acquires multiple codebooks to which different port configurations are applied is determined.

[0187] Conventionally, one CodebookConfig was configured for each CSI-ReportConfig. The CodebookConfig specifies the codebook type, the number of antenna ports, and codebook restrictions. Codebook types include Type 1 single / multi-panel, Type 2, and Type 2 port selection. Codebooks and ranks for Type 1 and Type 2 are restricted, including the number of antenna ports.

[0188] Figure 21 This is a diagram for explaining an example (1) of the configuration of a codebook for multiple CSI reports according to an embodiment of the present invention. Figure 21 As shown in the figure, N1 is the number of ports in the horizontal direction, N2 is the number of ports in the vertical direction, and Ng is the number of panels. The number of CSI-RS ports P is calculated as 2 (cross polarization) × Ng × N1 × N2.

[0189] The above-mentioned action 4) may include the methods of actions 4-1) to 4-3) as shown below. In addition, the codebook setting may correspond to CodebookConfig, and the CSI report setting may correspond to CSI-ReportConfig.

[0190] Action 4-1) The base station 10 sets a conventional codebook configuration for one CSI report configuration. The terminal 20 estimates an appropriate codebook based on a predefined method or a notification from the base station 10 .

[0191] Action 4-2) The base station 10 configures an extended codebook configuration applying different spatial assumptions for one CSI report configuration. The terminal 20 selects a codebook suitable for CSI measurement based on the spatial assumptions notified from the base station 10 .

[0192] Action 4-3) The base station 10 configures a plurality of extended codebook configurations applying different spatial assumptions for one CSI report configuration. The terminal 20 selects a codebook suitable for CSI measurement based on the spatial assumptions notified from the base station 10 .

[0193] The following describes action 4-1).

[0194] Terminal 20 estimates a codebook based on the spatial assumptions related to the reduced number of antennas, assuming the reduced number of panels, the reduced number of horizontal ports, and the reduced number of vertical ports. Base station 10 notifies terminal 20 of the spatial assumptions related to the reduced number of antennas, and terminal 20 estimates the codebook based on the following predefined rules.

[0195] Rule 1) Reduce only one of the number of panels, the number of horizontal ports, or the number of vertical ports.

[0196] Rule 2) Reduce two or more combinations of the number of panels, the number of horizontal ports, and the number of vertical ports. For example, first reduce the number of panels to a predefined level (e.g., 1), then reduce the number of vertical ports to a predefined level (e.g., 1), and then reduce the number of horizontal ports to a predefined level (e.g., 1). The order in which the number of panels, vertical ports, and horizontal ports are reduced can also be changed. Furthermore, for example, when a codebook with Ng = 1, N2 = 2, and N1 = 4 is set, i.e., a 16-port codebook, if the base station 10 requests 8-port CSI, the terminal 20 can also reduce N2 to 1, setting P = 8. Furthermore, if the base station 10 requests 4-port CSI, N1 can also be reduced to 2, setting P = 4.

[0197] The base station 10 may notify information of panels, horizontal ports, and vertical ports that are assumed to correspond to the space of the reduced number of antennas, and the terminal 20 may use the codebook based on the notification.

[0198] For example, the base station 10 may notify the values ​​of part or all of the number of panels, the number of horizontal ports, and the number of vertical ports.

[0199] For example, the base station 10 may also notify the index of a table defining the number of panels, the number of horizontal ports, and the number of vertical ports. The table may be set in advance through RRC signaling, MAC-CE, DCI, or broadcast information.

[0200] Table 7 is an example of a table notifying Ng, N1, and N2 indicating assumptions related to different spaces.

[0201] [Table 7]

[0202]

[0203] For example, when the table shown in Table 7 is configured (index #0 is the initial configuration), and the base station 10 notifies index #2, the terminal 20 can apply Ng=1, N1=2, N2=1 (P=4) to CSI measurement.

[0204] The above method can be applied to one or more codebook types. For example, the above method can be applied to codebook types of type 1 single panel, type 1 multi-panel, type 2, and type 2 port selection.

[0205] Some codebook settings set in the codebook may be valid only for spatial assumptions of all antennas, or all antennas and removed antennas. If invalid, the invalid settings may be set to default or predefined values.

[0206] The aforementioned codebook settings may include, for example, rank and / or codebook limit, codebookMode for type 1 codebook, and / or phaseAlphabetSize, subbandAmplitude, and numberOfBeams for type 2 codebook.

[0207] The following describes action 4-2).

[0208] The extended codebook setting can set multiple port assumptions. The extended codebook setting can have the same or different codebook types (i.e., type 1 single / multi-panel, type 2, type 2 port selection).

[0209] Figure 22 This is a diagram for explaining example (2) of the configuration of codebooks for multiple CSI reports according to an embodiment of the present invention. Figure 22 As shown, multiple port hypotheses can also be included in the codebook settings by importing the list.

[0210] The maximum number of port assumptions (i.e. Figure 22 The maxNrofTypeI-SinglePanelId, maxNrofTypeI-MultiPanelId, maxNrofTypeIIId, and maxNrofTypeII-PortSelectionId shown in the figure can be predefined or set based on UE capabilities. In addition, the content of the information element TypeI-SinglePanel-R18 can also be the same as the traditional one.

[0211] The following describes action 4-3).

[0212] Figure 23This figure illustrates an example (3) of a configuration related to codebooks for multiple CSI reports according to an embodiment of the present invention. The codebook types (i.e., Type 1 single / multi-panel, Type 2, or Type 2 port selection) of the codebook configuration for a CSI report configuration can be the same or different.

[0213] like Figure 23 As shown, a CSI report setting includes multiple codebook settings, so that different codebook types can be set. The maximum number of codebook settings (i.e. Figure 23 maxNrofCodebookConfigId as shown) or set according to UE capabilities.

[0214] Through the above-mentioned action 4), the codebook for CSI reporting in multiple CSI reports can be efficiently set.

[0215] Through the above embodiments, in order to reduce network power consumption, CSI reporting applying multiple spatial and / or power-related assumptions can be flexibly configured and executed, enabling CSI measurement with a reduced number of antennas or reduced power.

[0216] That is, in a wireless communication system, CSI (Channel state information) reporting can be efficiently performed to reduce power consumption on the network side.

[0217] (Device Structure)

[0218] Next, the functional configuration examples of the base station 10 and terminal 20 that perform the above-described processing and operations are described. The base station 10 and terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and terminal 20 may each include only a portion of the functions described in the embodiments.

[0219] <Base Station 10>

[0220] Figure 24 FIG. 1 is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention. Figure 24 As shown, the base station 10 includes a transmitting unit 110 , a receiving unit 120 , a setting unit 130 , and a control unit 140 . Figure 24 The functional configuration shown is merely an example, and any functional divisions and names of functional units may be used as long as the operations according to the embodiments of the present invention can be executed.

[0221] The transmitter 110 includes the function of generating signals to be sent to the terminal 20 and wirelessly transmitting these signals. Furthermore, the transmitter 110 transmits inter-network node messages to other network nodes. The receiver 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher-layer information from the received signals. Furthermore, the transmitter 110 includes the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. Furthermore, the receiver 120 receives inter-network node messages from other network nodes.

[0222] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to CSI reporting.

[0223] The control unit 140 performs control to implement the functions described in the embodiments. Furthermore, as described in the embodiments, the control unit 140 performs control related to CSI reporting. The functional units related to signal transmission in the control unit 140 may be included in the transmitter 110, while the functional units related to signal reception in the control unit 140 may be included in the receiver 120.

[0224] <Terminal 20>

[0225] Figure 25 FIG. 1 is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention. Figure 25 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Figure 25 The functional configuration shown is merely an example, and any functional divisions and names of functional units may be used as long as the operations according to the embodiments of the present invention can be executed.

[0226] The transmitter 210 generates a transmission signal based on the transmission data and wirelessly transmits the transmission signal. The receiver 220 wirelessly receives various signals and obtains higher-layer signals from the received physical layer signals. Furthermore, the receiver 220 has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, and the like transmitted from the base station 10. For example, for D2D communication, the transmitter 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), and the like to other terminals 20, while the receiver 220 receives PSCCH, PSSCH, PSDCH, or PSBCH from other terminals 20.

[0227] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10. The setting unit 230 also stores pre-set setting information. The content of the setting information is, for example, information related to CSI reporting.

[0228] The control unit 240 performs control to implement the functions described in the embodiments. Furthermore, as described in the embodiments, the control unit 240 performs control related to CSI reporting. The functional units related to signal transmission in the control unit 240 may be included in the transmitter 210, while the functional units related to signal reception in the control unit 240 may be included in the receiver 220.

[0229] (Hardware structure)

[0230] The block diagram used in the description of the above embodiment ( Figure 24 and Figure 25 ) shows blocks based on functions. These functional blocks (structural components) are implemented by any combination of at least one of hardware and software. Furthermore, there are no particular limitations on the implementation method of each functional block. Specifically, each functional block can be implemented using a single device that is physically or logically combined, or by using multiple devices that are directly or indirectly connected (for example, by wire or wirelessly) to two or more physically or logically separate devices. A functional block can also be implemented by combining software in one or more of these devices.

[0231] Functions include, but are not limited to, judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, considering, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (component) that enables the transmission function is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on the implementation method.

[0232] For example, the base station 10 , the terminal 20 , and the like in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 26 This figure shows an example of the hardware configuration of a base station 10 and a terminal 20 according to one embodiment of the present disclosure. The base station 10 and the terminal 20 may be configured as computer devices that physically include a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0233] In the following description, the word "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and the terminal 20 may include one or more of the devices shown in the figures, or may exclude some of the devices.

[0234] Each function in the base station 10 and the terminal 20 is implemented by reading predetermined software (program) into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs operations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0235] Processor 1001 controls the entire computer by, for example, running an operating system. Processor 1001 may also be comprised of a central processing unit (CPU) that includes interfaces with peripheral devices, a control unit, a computing unit, registers, and the like. For example, control unit 140 and control unit 240 described above may also be implemented by processor 1001.

[0236] Furthermore, the processor 1001 reads a program (program code), a software module, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes based on the program. As the program, a program that causes the computer to execute at least a part of the operations described in the above embodiments is used. For example, Figure 24 The control unit 140 of the base station 10 shown may also be implemented by a control program stored in the storage device 1002 and executed in the processor 1001. For example, Figure 25 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Although the various processes described above are performed by a single processor 1001, the various processes described above can also be performed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented by one or more chips. In addition, the program can also be transmitted from the network via a telecommunications line.

[0237] Storage device 1002 is a computer-readable recording medium and may be comprised of, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and RAM (Random Access Memory). Storage device 1002 may also be referred to as a register, cache, or main memory (main storage device). Storage device 1002 can store executable programs (program code), software modules, and the like for implementing the communication method according to one embodiment of the present disclosure.

[0238] The auxiliary storage device 1003 is a computer-readable recording medium and may be composed of, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a Compact Disc, a Digital Versatile Disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic stripe, and the like. The aforementioned storage medium may be, for example, a database, a server, or other appropriate medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0239] Communication device 1004 is hardware (a transceiver) used to facilitate communication between computers via at least one of a wired network and a wireless network. It may also be referred to as a network device, network controller, network card, or communication module. Communication device 1004 may also include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, transceiver antennas, amplifiers, transceivers, and transmission path interfaces may also be implemented using communication device 1004. The transceiver may also be implemented as a physically or logically separate transmitter and receiver.

[0240] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, LED light, etc.). Alternatively, the input device 1005 and output device 1006 may be integrally formed (e.g., a touch panel).

[0241] Furthermore, the processor 1001, the storage device 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between devices.

[0242] Furthermore, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). Part or all of each functional block may be implemented using this hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0243] Figure 27 2001 shows a structural example of a vehicle. Figure 27As shown, vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. The various forms and embodiments described in this disclosure may also be applied to a communication device mounted on vehicle 2001, such as communication module 2013.

[0244] The driving unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also referred to as a steering wheel) and is configured to steer at least one of the front wheels and the rear wheels based on the user's operation of the steering wheel.

[0245] Electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2029 included in vehicle 2001 are input to electronic control unit 2010. Electronic control unit 2010 may also be referred to as an ECU (Electronic Control Unit).

[0246] As signals from various sensors 2021 to 2029, there are current signals from the current sensor 2021 that monitors the current of the motor, speed signals of the front wheels or rear wheels obtained by the speed sensor 2022, air pressure signals of the front wheels or rear wheels obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression amount signals obtained by the accelerator pedal sensor 2029, brake pedal depression amount signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, detection signals for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028, etc.

[0247] Information service unit 2012 is comprised of various devices, such as the car navigation system, audio system, speakers, television, and radio, that provide (or output) various types of information, including driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices. Information service unit 2012 utilizes information obtained from external devices via communication module 2013 and other means to provide various multimedia information and services to the occupants of vehicle 2001. Information service unit 2012 may include input devices (such as a keyboard, mouse, microphone, switches, buttons, sensors, and touch panels) for receiving external input, and output devices (such as a display, speaker, LED light, and touch panels) for providing external output.

[0248] The driving assistance system 2030 consists of various devices that provide functions for preventing accidents or reducing the driver's driving burden, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning sensors (such as GNSS), map information (such as high-definition (HD) maps and autonomous vehicle (AV) maps), gyroscope systems (such as IMUs (Inertial Measurement Units) and INS (Inertial Navigation Systems)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. Furthermore, the driving assistance system 2030 transmits and receives various information via the communication module 2013 to implement driving assistance functions or autonomous driving functions.

[0249] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 can transmit and receive data via the communication port 2033 with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 within the electronic control unit 2010, memory (ROM, RAM) 2032, and sensors 2021-29 included in the vehicle 2001.

[0250] The communication module 2013 is controlled by the microprocessor 2031 of the electronic control unit 2010 and is a communication device capable of communicating with external devices. For example, various information can be transmitted and received with the external device via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. The external device can also be, for example, a base station or a mobile station.

[0251] The communication module 2013 may also transmit at least one of the signals input to the electronic control unit 2010 from the various sensors 2021-2028, information obtained based on these signals, and information based on external (user) input received via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, and the like may also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 2013 may include information based on these inputs.

[0252] The communication module 2013 receives various information (such as traffic information, signal information, and inter-vehicle information) transmitted from external devices and displays it on the information service unit 2012 of the vehicle 2001. The information service unit 2012 can also be referred to as an output unit that outputs information (for example, outputs information to a display, speaker, or other device based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)). Furthermore, the communication module 2013 stores various information received from external devices in a memory 2032 accessible to the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 controls the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, and sensors 2021-2029 of the vehicle 2001.

[0253] (Summary of implementation methods)

[0254] As described above, according to an embodiment of the present invention, a terminal is provided, comprising: a receiving unit, which receives a CSI (Channel State Information) report setting from a base station, wherein the CSI report setting applies multiple assumptions related to different spaces; a control unit, which performs measurement based on the CSI report setting; and a sending unit, which sends a CSI report to the base station based on a result of the measurement, wherein the control unit determines a feedback type to be reported to the base station based on the CSI report setting.

[0255] The above structure allows for flexible configuration and execution of CSI reporting that applies multiple spatial and / or power-related assumptions to reduce network power consumption. This allows for CSI measurements even with a reduced number of antennas or reduced power. This allows efficient CSI (Channel State Information) reporting in wireless communication systems, reducing network power consumption.

[0256] The control unit may, based on the CSI report configuration, commonly set a feedback type for the multiple assumptions related to different spaces. This configuration allows for flexible configuration and execution of CSI reports that apply multiple assumptions related to space and / or power, to reduce network power consumption. This enables CSI measurement even when the number of antennas is reduced or power is lowered.

[0257] The control unit may configure different feedback types for the multiple assumptions related to different spaces based on the CSI report configuration. This configuration allows for flexible configuration and execution of CSI reports that apply multiple assumptions related to space and / or power, to reduce network power consumption. This allows for CSI measurement even when the number of antennas is reduced or power is lowered.

[0258] The control unit may assume that the feedback types are independent for the multiple hypotheses related to different spaces. This configuration allows for flexible configuration and execution of CSI reports that apply multiple spatial and / or power-related assumptions to reduce network power consumption, enabling CSI measurement even when the number of antennas is reduced or power is lowered.

[0259] The control unit may assume that some feedback types are common across the multiple hypotheses related to different spaces. This configuration allows for flexible configuration and execution of CSI reports that apply multiple spatial and / or power-related assumptions to reduce network power consumption, enabling CSI measurement even when the number of antennas is reduced or power is lowered.

[0260] In addition, according to an embodiment of the present invention, a measurement method is provided, in which a terminal performs the following steps: receiving a CSI (Channel State Information) report setting from a base station, wherein the CSI report setting applies multiple assumptions related to different spaces; performing measurement based on the CSI report setting; sending a CSI report to the base station based on a result of the measurement; and determining a feedback type to be reported to the base station based on the CSI report setting.

[0261] The above structure allows for flexible configuration and execution of CSI reporting that applies multiple spatial and / or power-related assumptions to reduce network power consumption. This allows for CSI measurements even with a reduced number of antennas or reduced power. This allows efficient CSI (Channel State Information) reporting in wireless communication systems, reducing network power consumption.

[0262] (Supplement to the implementation method)

[0263] While the embodiments of the present invention have been described above, the disclosed invention is not limited to these embodiments. Persons skilled in the art will appreciate various variations, modifications, substitutions, and replacements. Specific numerical values ​​are used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate value may be used. The distinctions between items in the above description are not essential to the present invention. Matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as there is no inconsistency). The boundaries of functional units or processing units in functional block diagrams do not necessarily correspond to the boundaries of physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. Regarding the processing steps described in the embodiments, the order of the processing may be reversed where there is no inconsistency. For ease of explanation, the base station 10 and terminal 20 are described using functional block diagrams, but such devices may also be implemented using hardware, software, or a combination thereof. The software that operates according to the embodiments of the present invention by the processor of the base station 10 and the software that operates according to the embodiments of the present invention by the processor of the terminal 20 can also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, and other appropriate storage media.

[0264] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information can be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0265] Each form / embodiment described in the present disclosure may also be applied to a mobile communication system utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6G (6th generation mobile communication system), xG (xth generation mobile communication system) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (New Radio), New Radio Access (NX), Future Generation Radio Access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE At least one of 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems that are extended, modified, created, or specified based on these systems. Furthermore, a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G) may also be used.

[0266] The processing steps, sequences, and flows of each form / implementation described in this specification may be rearranged in order unless there is a conflict. For example, the methods described in this disclosure use an illustrative order to present the elements of various steps, but are not limited to the specific order presented.

[0267] In this specification, specific operations performed by base station 10 may also be performed by its upper node, depending on the situation. In a network consisting of one or more network nodes including base station 10, it is obvious that various operations for communicating with terminal 20 can be performed by at least one of base station 10 and other network nodes other than base station 10 (for example, but not limited to, an MME or S-GW). While the above example illustrates a single other network node other than base station 10, the other network node may also be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0268] The information or signals described in this disclosure can be output from a higher layer (or lower layer) to a lower layer (or higher layer), or can be input or output via multiple network nodes.

[0269] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be rewritten, updated, or appended. Output information can also be deleted. Input information can also be transmitted to other devices.

[0270] The determination in the present disclosure may be made using a value represented by one bit (0 or 1), a Boolean value (true or false), or a comparison of numerical values ​​(eg, comparison with a predetermined value).

[0271] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to instructions, sets of instructions, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0272] Furthermore, software, commands, information, and the like may also be transmitted and received via a transmission medium. For example, if software is transmitted from a webpage, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, DSL, etc.) and a wireless technology (infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0273] The information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, and the like that may be referred to in the entire description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0274] Furthermore, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may also be referred to as a carrier frequency, a cell, or a frequency carrier.

[0275] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0276] In addition, the information, parameters, etc. described in this disclosure can be expressed using absolute values, relative values ​​relative to predetermined values, or other corresponding information. For example, wireless resources can also be indicated using indexes.

[0277] The names used for the above parameters are non-limiting in any respect. Furthermore, the formulas and the like using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore the names assigned to these channels and information elements are non-limiting in any respect.

[0278] In this disclosure, terms such as "base station (BS)," "wireless base station," "base station apparatus," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Base stations are also sometimes referred to as macrocells, small cells, femtocells, and picocells.

[0279] A base station can host one or more (for example, three) cells. When a base station hosts multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can be provided with communications services by a base station subsystem (for example, a small indoor base station (RRH)). Terms like "cell" or "sector" refer to a portion or the entire coverage area of ​​at least one of the base station and base station subsystem providing communications services within that coverage area.

[0280] In the present disclosure, the base station sending information to the terminal may also be replaced by the base station instructing the terminal to perform a control / action based on the information.

[0281] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” can be used interchangeably.

[0282] For a mobile station, those skilled in the art sometimes also use the following terms to refer to it: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0283] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to an object that can move, and the moving speed is arbitrary. In addition, of course, it also includes the case where the mobile body is stopped. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, connected cars, shovel cars, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, rear cars, rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon, and is not limited thereto. In addition, the mobile body may also be a mobile body that drives autonomously based on an operation instruction. These can be vehicles (such as cars and airplanes), unmanned mobile objects (such as drones and self-driving cars), or robots (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include devices that do not necessarily move during communication. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0284] Furthermore, the base stations in this disclosure may be replaced with user terminals. For example, a configuration in which communication between a base station and user terminals is replaced with communication between multiple terminals 20 (e.g., D2D (Device-to-Device) or V2X (Vehicle-to-Everything)) may also apply to the various forms / implementations of this disclosure. In this case, the terminals 20 may also have the functionality of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, terms such as uplink channel and downlink channel may be replaced with side channels.

[0285] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may have the functions of the user terminal.

[0286] As used in this disclosure, terms such as “determining” and “determining” sometimes encompass a variety of actions. For example, “determining” and “judging” may include considering matters involving judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in a table, database, or other data structure), or ascertaining as matters involving “determining” or “determining.” Furthermore, “determining” and “receiving” (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, or accessing (e.g., accessing data in a memory) as matters involving “determining” or “determining.” Furthermore, “determining” and “resolving” may include considering matters involving selecting, choosing, establishing, or comparing as matters involving “determining” or “determining.” That is, “judgment” and “decision” can include actions that are considered to have been “judged” or “decided.” Furthermore, “judgment” (decision) can be replaced with “assuming,” “expecting,” “considering,” and so on.

[0287] The terms “connected”, “coupled” or any variation of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include situations where there is one or more intermediate elements between the two elements that are “connected” or “coupled” to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, “access” may be used instead of “connection”. As used in this disclosure, two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the wireless frequency domain, microwave region and light (including both visible and invisible) region may be used to “connect” or “couple” to each other.

[0288] The reference signal may be referred to as RS (Reference Signal) for short, or may be called a pilot signal depending on the applicable standard.

[0289] The phrase “based on” used in this disclosure does not mean “based only on” unless explicitly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0290] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Therefore, a reference to a first element and a second element does not imply that only two elements can be used or that the first element must precede the second element in any manner.

[0291] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section,” “circuit,” “device,” or the like.

[0292] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," are intended to be inclusive. Furthermore, the term "or" used in this disclosure does not mean an exclusive or.

[0293] A radio frame can be composed of one or more frames in the time domain. In the time domain, one or more frames can be called a subframe. A subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed duration (e.g., 1 ms) that is independent of the numerology.

[0294] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by the transceiver in the frequency domain, and specific windowing performed by the transceiver in the time domain.

[0295] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0296] A slot can contain multiple mini-slots. Each mini-slot can consist of one or more symbols in the time domain. Furthermore, a mini-slot can also be referred to as a sub-slot. A mini-slot can consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in time units larger than a mini-slot is referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot is referred to as PDSCH (or PUSCH) mapping type B.

[0297] Radio frame, subframe, time slot, mini-time slot, and symbol all represent time units for signal transmission. Radio frame, subframe, time slot, mini-time slot, and symbol may be referred to by other corresponding names.

[0298] For example, a subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can be called a TTI, and a slot or minislot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI can be called a slot, a minislot, or something similar, rather than a subframe.

[0299] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules the allocation of wireless resources (such as the frequency bandwidth and transmit power available to each terminal 20) to each terminal 20 using TTIs as units. The definition of TTI is not limited to this.

[0300] A TTI can be a unit of time for transmitting data packets (transport blocks), code blocks, code words, etc. after channel coding, or a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0301] Furthermore, while one time slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-slots) can also serve as the minimum time unit for scheduling. Furthermore, the number of time slots (mini-slots) that constitute this minimum time unit for scheduling can also be controlled.

[0302] A TTI with a duration of 1 ms is also referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, or a time slot. A TTI shorter than a normal TTI is also referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, or a time slot.

[0303] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can be understood as a TTI with a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can be understood as a TTI with a TTI length that is shorter than the long TTI and greater than 1 ms.

[0304] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it can contain one or more contiguous subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined by the parameter set.

[0305] In addition, the time domain of an RB may include one or more symbols and may be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0306] In addition, one or more RBs may also be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, etc.

[0307] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0308] A bandwidth part (BWP) (also known as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a carrier. Common RBs can be identified by their index relative to the common reference point for that carrier. PRBs can be defined within a BWP and numbered within that BWP.

[0309] The BWP may include a UL BWP and a DL BWP. One or more BWPs may be configured for a UE within one carrier.

[0310] At least one of the configured BWPs may be active, and it may not be assumed that the UE transmits or receives predetermined signals / channels outside of the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

[0311] The above-described structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the structures, such as the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots in a slot, the number of symbols and RBs in a slot or mini-slot, the number of subcarriers in an RB, the number of symbols per TTI, the symbol length, and the cyclic prefix (CP) length.

[0312] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure also includes cases where the noun following the article is in plural form.

[0313] In this disclosure, the phrase "A and B are different" can mean "A and B are different from each other." Alternatively, the phrase can mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0314] The various forms / implementations described in this disclosure may be used individually or in combination, and may be switched between them depending on the implementation. Furthermore, notification of scheduled information is not limited to being explicit (e.g., notification of "Yes X") but may also be implicit (e.g., not notifying the scheduled information).

[0315] While the present disclosure has been described in detail above, it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in various modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes only and does not have any limiting meaning on the present disclosure.

[0316] Description of labels

[0317] 10 base stations

[0318] 110 Sending Department

[0319] 120 Receiving Department

[0320] 130 Setting Department

[0321] 140 Control Department

[0322] 20 Terminal

[0323] 210 Sending Department

[0324] 220 Receiving Department

[0325] 230 Setting Department

[0326] 240 Control Department

[0327] 30 Core Network

[0328] 1001 Processor

[0329] 1002 Storage Device

[0330] 1003 Auxiliary storage device

[0331] 1004 Communication devices

[0332] 1005 Input Device

[0333] 1006 Output Device

[0334] 2001 Vehicle

[0335] 2002 Drive Department

[0336] 2003 Steering

[0337] 2004 Accelerator Pedal

[0338] 2005 Brake Pedal

[0339] 2006 gear lever

[0340] 2007 front wheel

[0341] 2008 rear wheel

[0342] 2009 Axle

[0343] 2010 Electronic Control Department

[0344] 2012 Information Services Department

[0345] 2013 Communication Module

[0346] 2021 Current Sensor

[0347] 2022 Speed ​​Sensor

[0348] 2023 Air Pressure Sensor

[0349] 2024 Vehicle Speed ​​Sensor

[0350] 2025 Accelerometer

[0351] 2026 Brake Pedal Sensor

[0352] 2027 Gearshift sensor

[0353] 2028 Object Detection Sensor

[0354] 2029 Accelerator pedal sensor

[0355] 2030 Driving Assistance Systems Department

[0356] 2031 Microprocessor

[0357] 2032 Memory (ROM, RAM)

[0358] 2033 Communication port (IO port)

Claims

1. A terminal comprising: a receiving unit configured to receive a CSI reporting configuration, i.e., a channel state information reporting configuration, from a base station, the CSI reporting configuration applying a plurality of assumptions related to different spaces; a control unit configured to perform measurement based on the CSI report configuration; as well as a sending unit, configured to send a CSI report to the base station based on the measurement result, The control unit determines a feedback type to be reported to the base station based on the CSI reporting configuration.

2. The terminal according to claim 1, wherein: The control unit sets a feedback type in common for the plurality of hypotheses related to the different spaces based on the CSI report configuration.

3. The terminal according to claim 1, wherein: The control unit sets different feedback types for the plurality of hypotheses related to different spaces based on the CSI report configuration. The terminal according to claim 1 , wherein: The control unit assumes that feedback types are independent in the plurality of hypotheses related to different spaces. The terminal according to claim 1 , wherein: The control unit assumes that a portion of feedback types are common among the plurality of hypotheses related to different spaces.

6. A measurement method, wherein the terminal performs the following steps: receiving a CSI reporting configuration (i.e., a channel state information reporting configuration) from a base station, wherein the CSI reporting configuration applies multiple assumptions related to different spaces; performing measurement based on the CSI reporting configuration; Sending a CSI report to the base station based on a result of the measurement; as well as Based on the CSI reporting configuration, a feedback type reported to the base station is determined.

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