Terminal and measurement method

Abstract

A terminal is provided with: a reception unit that receives, from a base station, channel state information report settings, which are 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.

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 large-capacity systems, high data transmission speeds, low latency, simultaneous connection of multiple terminals, low costs, and power saving are being studied (for example, non-patent document 1).

[0003] In addition, in version 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 has increased, and methods for energy saving have been studied (for example, non-patent document 2).

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 3GPP TS 38.300 V17.3.0 (2022-12)

[0007] Non-Patent Document 2: “New WID: Network energy savings for NR,” RP-223540, 3GPP TSG 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 (2015-06)

[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 conservation in networks, research is underway to efficiently adapt spatial domain elements 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, which receives a CSI report setting, i.e., a 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.

[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 the configuration related to multiple CSI reports.

[0024] Figure 7 This 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 of multiple CSI reports according to an embodiment of the present invention.

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

[0029] Figure 12 This is a diagram for explaining example (1) of the 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 the 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 the 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 the 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 the 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 the 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 example (7) of the 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 the configuration related to resources for multiple CSI reports according to an embodiment of the present invention.

[0037] Figure 20This is a diagram for explaining example (9) of the 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 the 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 the 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 the 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, embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are merely examples, and embodiments to which the present invention is applied are not limited to the following embodiments.

[0046] In the operation of the wireless communication system according to the embodiments of the present invention, existing technologies are appropriately used. 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 addition, 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 are for convenience of description, and the same signals, functions, etc. may also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used for NR are not necessarily explicitly described as "NR-".

[0048] Furthermore, in the embodiment of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (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 FIG. 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 an example, and there may be a plurality of each.

[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 in 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, and is also called broadcast information. The synchronization signal and system information may also be referred to as SSB (SS / PBCH block). As shown in FIG. 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 (SCel l: 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 based on DC (Dual Connectivity) and the primary and secondary cell group cells (PSCell: Primary SCG Cell) of other base stations 10.

[0052] The terminal 20 is a communication device having a wireless communication function, such as a smart phone, 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 spatial elements involved in CSI (Channel State Information) reporting and beam management. Furthermore, research is underway to efficiently adapt the power offset between 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 instructing 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 (Periodic CSI report), semi-persistent CSI reports (Semi-persistent CSI report), and aperiodic CSI reports (Aperiodic CSI report) 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 in a 1-to-S manner. CSI resource sets are, for example, NZP-CSI-RS-ResourceSet, CSI-SSB-ResourceSet, or CSI-IM_ResourceSet. All CSI-RS resources included in a CSI resource set are set to the same number of ports. In addition, as a CMR (Channel measurement resource), only one CSI resource set can also be set.

[0060] like Figure 2 As shown, the CSI resource set specifies CSI resources in a 1-to-1 list format. 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 does not change, but the beamforming gain is reduced.

[0064] Figure 4 This 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 related to adaptation, it is assumed that multiple 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 such as 1) to 3) shown below.

[0070] 1) When the base station 10 creates multiple 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 due to 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, e.g., 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-mentioned actions 1), 2), 3), and 4) may be used in multiple CSI reports related to multiple spatial hypotheses. In addition, the above-mentioned 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] The assumptions related to space may include part or all of 1) to 3) shown below.

[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. Applicable to antenna off 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 set 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 RE (Resource Element) 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 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 jointly reporting spatial and power-related assumptions.

[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 configuration related to triggering of 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, 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 of the hypothetical index or bitmap of the hypothetical index through MAC-CE and / or DCI. For example, when the bitmap "1011" is notified, three CSIs corresponding to the hypothetical indices {0, 2, 3} can be reported. For example, when 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 MAC-CE and / or DCI notifies the number of ports as 4, 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 MAC-CE and / or DCI notifies the number of ports as 4, the CSI for spatial and / or power-related hypotheses corresponding to port numbers 4 or less 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 on, 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 CSI report configuration (e.g., CSI-ReportConfig). In the case of enhanced multiple CSI reports, indicates the UE capability of the maximum number of CSI report configurations (e.g., CSI-ReportConfig). Indicates the UE capability of the supported spatial and / or power-related assumptions. For example, the spatial and / or power-related assumptions may include the number of antenna ports to be reduced, the number of ports to be reduced, the power level to be reduced, the spatial and temporal migration time, 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-related hypotheses for the terminal 20 .

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

[0108] One or more CSI categories (CSI quantity) 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 through the information element reportQuantity setting contained in CSI-ReportConfig.

[0109] Figure 9 This is a diagram for explaining example (1) of the configuration related to feedback categories 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. This means that the CQI may be different when different power levels are assumed. For example, across multiple CSI reports assuming different numbers of ports, the CRI, RI, PMI, and CQI may not be common. This means that the CRI, RI, PMI, and CQI may be different when different numbers of ports are assumed.

[0111] Action 2-1) As shown in 1) or 2) below, multiple CSI reports configured 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 in CSI-ReportConfig. Terminal 20 can report one or more CSI categories 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 may use different reportQuantity settings. Figure 10 This is a diagram for explaining example (2) of the configuration related to feedback categories 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 an assumed index with an assumed number of ports and an offset appended.

[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 a spatial and / or power-related hypothesis can be a) or b) as shown below.

[0117] a) Mapping can be performed between the reportQuantity and the CSI report or the space and / or power related hypotheses according to the order of the reportQuantity (for example, 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) The base station 10 may notify the terminal 20 of whether one or more CSI values ​​are independent or common among multiple CSI reports or reported hypotheses related to multiple spatial and / or power conditions. For example, regarding reports in which CSI values ​​are independent or common, the actions described in 1) or 2) below may be performed.

[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 in 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 categories may be reported for the selected CSI report or spatial and / or power-related hypothesis, while only some CSI categories may be reported for other unselected CSI reports or spatial and / or power-related hypotheses. Terminal 20 may also derive independent CSI categories for other CSI reports or spatial and / or power-related hypotheses based on the common CSI categories in the selected CSI report or spatial and / or power-related hypothesis.

[0122] For example, if cri-RI-PMI-CQI is configured for both 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] In addition, regarding reporting all CSI categories, the selected CSI report or the assumptions related to space and / or power can be determined as shown in 1)-3) below.

[0124] 1) Explicit notification can be performed. For example, the selection of all CSI reports or one of the spatial and / or power-related hypotheses can be notified through an index or a bitmap.

[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 determined 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, to be the CSI report or the hypothesis related to space and / or power set at 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 example (3) of the configuration related to feedback categories for multiple CSI reports according to an embodiment of the present invention. Figure 11 As shown, a new CSI category 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 category, 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 category.

[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 cr i-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 cr i-RI-CQI is set in 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 operation 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 one 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 Action 3-1) to Action 3-3) shown below.

[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 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) may also configure an enhanced RS resource configuration, ie, one or more RS resources to which different spatial assumptions are applied for one CSI report configuration.

[0140] Figure 12 This is a diagram for explaining example (1) of the configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 12 (A) shown is the resource configuration and measurement related to the conventional CSI report. Figure 12 The shown (B) corresponds to the above-mentioned operation 3-1), and the antenna reduction is set at the stage of channel estimation. Figure 12 The shown (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 operation 3-3), and in the stage of setting the base station 10 , antenna reduction is set in the RS resources through one CSI report setting.

[0141] The above-mentioned operation 3) is used for CSI reporting that applies assumptions related to multiple spaces. It is also possible to support antenna off modes that apply assumptions related to different spaces 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 highest flexibility, highest accuracy, and greatest complexity.

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

[0144] Action 3-1-1) The base station 10 may notify the index of a valid or invalid port, or may notify the set port mode. For example, when RS resources of 8 ports indexed #0 to #7 are set, the base station 10 may notify the port index {0, 1, 2, 3} that is valid for antenna reduction, and the terminal 20 may extract the channels of ports 0, 1, 2, and 3 from the 8-port RS based on the notification and derive the 4-port CSI. In addition, for example, when RS resources of 8 ports indexed #0 to #7 are set, the base station 10 may notify mode #1 and mode #2 shown in Table 4 for antenna reduction, and the terminal 20 may derive the 4-port CSI of the channels corresponding to ports 0, 2, 4, and 6 extracted from the 8-port RS and the 2-port CSI of the channels corresponding to ports 0 and 5 extracted from the 8-port RS.

[0145] [Table 4]

[0146] index Valid port index Mode #0 0，1，2，3 Pattern #1 0，2，4，6 Pattern #2 0，5 Pattern #3 0,1,2,3,4,5,6,7 (all valid)

[0147] Action 3-1-2) The base station 10 may also notify the number of ports or port indexes of the antennas to be reduced. For example, when RS resources with 8 ports indexed #0 to #7 are set, the base station 10 notifies the port indexes #1 and #2 shown in Table 5 to reduce the antennas. The terminal 20 can 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] index Number of ports Valid port index 0 8 0, 1, 2, 3, 4, 5, 6, 7 (all valid) 1 4 0，1，2，3 2 2 0，5 3 1 0

[0150] Action 3-1-3) The base station 10 may also notify the minimum number of ports to be reduced or the index of the number of ports. The terminal 20 may also derive CSI from the minimum number of ports to the number of ports of the configured resource. For example, when RS resources of 8 ports with indices #0 to #7 are configured, the base station 10 notifies the number of ports index #2 shown in Table 5 to reduce the antenna. The 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 also be performed via RRC signaling, MAC-CE or group or UE-specific DC I.

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

[0153] The terminal 20 may also derive CSI-RS resources for the reduced number of ports as shown below. The CSI-RS resources for the reduced number of ports may be derived based on the CSI-RS settings (CDM size, number of CDM groups, position, etc.) of the existing specifications, or may be derived based on CSI-RS settings not included in the 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 then reduce the number of CDM groups.

[0158] Action 3-2-3-2) First reduce the number of CDM groups to a predefined size (eg 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 the configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Table 6 is 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, which is a CDM size of 8-FD 2-TD4, 4 CDM groups, and 32 ports. 32 ports are set based on the CDM size of 8 × the number of CDM groups of 4. 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 the configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 14 This corresponds to the above-mentioned operation 3-2-1), and is an example of reducing the CDM size by, for example, changing from 32 ports to 16 ports, then 8 ports, and finally 4 ports. 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 the 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 the 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] The following describes action 3-3). An enhanced RS resource setting may be configured, that is, one or more RS resources that apply different spatial assumptions to a single CS I report setting.

[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. That is, 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 setting, more than one resource set corresponding to the spatial assumptions related to different gNBs can be set.

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

[0174] Figure 17 This is a diagram for explaining example (6) of the 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 values ​​exceeding 1 for multiple CSI reports. This value can be set based on notification from the base station 10 and / or UE capabilities. That is, the values ​​of 1) to 3) shown below can also be set to values ​​exceeding 1.

[0176] 1) maxNrofNZP-CSI-RS-ResourceSetsPerConfig for nzp-CSI-RS-ResourceSetList contained in 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) may be directed to resource configurations where the channel and / or interference measurement configuration in the CSI report configuration (CSI-Report Config) exceeds 1.

[0182] Figure 18 This is a diagram for explaining an example (7) of the 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 can include one or more CSI resources that apply spatial assumptions related to 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 measurement. 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. Extended resource settings can also be defined for channel and / or interference measurement. 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 example (9) of the configuration related to resources for multiple CSI reports according to an embodiment of the present invention. Figure 20 (A) shown is a resource setting involved in a conventional CSI report using an assumption related to one space. Figure 20 (B) shown is the resource setting related to the CSI report corresponding to the action 3-3-1) applying the assumption related to multiple spaces, and multiple ports are introduced in NZP-CSI-RS-ResourceSet. Figure 20(C) shown is a resource configuration related to the CSI report corresponding to action 3-3-2) applying the assumption related to multiple spaces, and more than one resource set is introduced in the CSI resource configuration. Figure 20 (D) shown is a resource configuration related to the CSI report corresponding to action 3-3-3) applying the assumption related to multiple spaces, and introducing more than one resource set in channel measurement.

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

[0186] The following describes operation 4) which determines codebook configurations for multiple CSI reports. For example, it determines how the terminal 20 acquires multiple codebook configurations to which different port configurations are applied.

[0187] Conventionally, one CodebookConfig was configured for each CSI-ReportConfig. 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 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 FIG, 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 following methods of action 4-1) to action 4-3). In addition, the codebook configuration may correspond to CodebookConfig, and the CSI report configuration may correspond to CSI-ReportConfig.

[0190] Action 4-1) The base station 10 sets a conventional codebook configuration for a 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 multiple 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) Only reduce one of the number of panels, the number of horizontal ports, and 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 of reducing the number of panels, the number of vertical ports, and the number of horizontal ports can also be changed. In addition, for example, when Ng=1, N2=2, N1=4, that is, a 16-port codebook is set, when the base station 10 requests 8-port CSI, the terminal 20 can also reduce N2 to 1 and set P=8. Furthermore, when the base station 10 requests 4-port CSI, N1 can also be reduced to 2 and set P=4.

[0197] The base station 10 may notify information of panels, horizontal ports, and vertical ports corresponding to assumptions regarding the space after the reduction in the number of antennas, and the terminal 20 may use a 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 showing Ng, N1, and N2 representing assumptions related to different spaces.

[0201] [Table 7]

[0202] index Ng N1 N2 0 2 2 2 1 1 2 2 2 1 2 1 3 1 1 1

[0203] For example, when the table shown in Table 7 is set (index #0 is the initial setting), when 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 assumptions related to the space 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 restrictions, codebookMode for type 1 codebooks, and phaseAlphabetSize, subbandAmplitude, and numberOfBeams for type 2 codebooks.

[0207] Next, action 4-2) will be described.

[0208] The extended codebook setting may be configured with multiple port hypotheses. The extended codebook setting may have the same or different codebook types (ie, 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 the codebook 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 FIG. 1 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 is used to illustrate 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, and 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 can also include multiple codebook settings, so that different codebook types can be set. The maximum number of codebook settings (i.e. Figure 23 maxNrofCodebo okConfigId) as shown or set based on UE capabilities.

[0214] Through the above-mentioned operation 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 set and executed, so that CSI measurement can be performed when the number of antennas is reduced or the power is lowered.

[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 is a diagram showing an example of the functional configuration of the base station 10 in 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 a signal to be sent to the terminal 20 and wirelessly transmitting the signal. 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 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 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 transmitting unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and obtains higher-layer signals from the received physical layer signals. In addition, the receiving unit 220 has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. In addition, for example, as D2D communication, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20, and the receiving unit 220 receives PSCCH, PS SCH, PSDCH, or PSBCH, etc. 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 in functional units. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using one device that is physically or logically combined, or can be implemented using multiple devices by connecting two or more physically or logically separated devices directly or indirectly (for example, using wired or wireless connections). The functional blocks can also be implemented by combining software in the above-mentioned one device or the above-mentioned multiple 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, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that performs a transmitting function is referred to as a transmitting unit or a transmitter. In short, as described above, there is no particular limitation 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 can 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 term "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] The various functions in the base station 10 and the terminal 20 are implemented as follows: predetermined software (programs) are read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations 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 device, a computing device, registers, and the like. For example, control unit 140 and control unit 240 described above may also be implemented by processor 1001.

[0236] In addition, 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 a 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. 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] The storage device 1002 is a computer-readable recording medium and may be composed 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). The storage device 1002 may also be referred to as a register, cache, or main memory (main storage device). The 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 can be composed of 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 (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic stripe, etc. The above-mentioned storage medium can 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 communicate between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network card, or communication module. Communication device 1004 may 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, communication device 1004 may also implement a transceiver antenna, an amplifier, a transceiver, a transmission path interface, and the like. The transceiver may also be implemented by physically or logically separating the 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 the 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 using a single bus or 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 ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array), and may implement some or all of the functional blocks 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] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2029 included in the vehicle 2001 are input to the electronic control unit 2010. The 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 senses 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] The information service unit 2012 is composed of various devices such as a car navigation system, audio system, speakers, televisions, and radios that provide (output) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 2012 uses information obtained from external devices via the communication module 2013 and other means to provide various multimedia information and multimedia services to the passengers of the vehicle 2001. The information service unit 2012 may include input devices that receive input from the outside (e.g., a keyboard, mouse, microphone, switches, buttons, sensors, touch panels, etc.) and output devices that provide output to the outside (e.g., a display, speakers, LED lights, touch panels, etc.).

[0248] Driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents or reducing the driver's driving load, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning devices (such as GNSS), map information (such as high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyroscope systems (such as IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, AI processors, and one or more ECUs that control these devices. In addition, driving assistance system unit 2030 sends and receives various information via 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 in the electronic control unit 2010, memory (ROM, RAM) 2032, and sensors 2021 to 2029 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 can 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 can also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 2013 can include information based on these inputs.

[0252] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on the information service unit 2012 included in 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 can also control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear lever 2006, front wheels 2007, rear wheels 2008, axles 2009, and sensors 2021 to 2029 included in 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 report setting, i.e., a 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.

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

[0256] The control unit may execute multiple measurements validating different numbers of ports based on the CSI report configuration. 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 measurements to be performed even when the number of antennas is reduced or power is lowered.

[0257] The control unit may determine the number of ports used for the measurement based on the coefficient of the number of activated antennas included in the CSI report configuration. 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 measurements to be performed even when the number of antennas is reduced or power is lowered.

[0258] The receiving unit may receive, from the base station, CSI reporting configurations that apply multiple assumptions related to different powers. This configuration allows for flexible configuration and execution of CSI reporting that applies multiple spatial and / or power assumptions to reduce network power consumption, enabling CSI measurement even with a reduced number of antennas or reduced power.

[0259] The control unit may perform multiple measurements using different power offsets based on the CSI report configuration. This configuration allows flexible configuration and execution of CSI reports using multiple spatial and / or power-related assumptions to reduce network power consumption, enabling CSI measurements to be performed 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 report setting, i.e., a 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; and sending a CSI report to the base station based on the result of the measurement.

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

[0262] (Supplementary Implementation Methods)

[0263] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various variations, modifications, alternatives, replacements, etc. In order to facilitate understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values ​​are only examples, and any appropriate values ​​can be used. The distinction between items in the above description is not essential to the present invention. You can combine and use the matters recorded in two or more items as needed, or you can apply the matters recorded in a certain item to the matters recorded in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of the physical components. The actions of multiple functional units can be performed by one physical component, or the actions of one functional unit can be performed by multiple physical components. Regarding the processing procedures described in the embodiments, the order of processing can be reversed if there is no contradiction. For the convenience of explaining the processing, the base station 10 and the terminal 20 are described using a functional block diagram, but such a device can also be implemented by hardware, software, or a combination thereof. The software that operates in accordance with the embodiments of the present invention through the processor of the base station 10 and the software that operates in accordance with the embodiments of the present invention through 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 any other appropriate storage medium.

[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 may 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 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 can also be applied to a mobile communication system using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (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 At least one of IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems that are expanded, 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 procedures, timings, 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 actions 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 actions performed for communication with terminal 20 can be performed by at least one of base station 10 and other network nodes other than base station 10 (e.g., MME or S-GW, but not limited to these). 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 (e.g., MME and 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), and can also be input and 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 overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0270] The determination in the present disclosure may be performed using a value represented by one bit (0 or 1), a Boolean value (Boolean: true or false), or a comparison of numerical values ​​(for example, 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 be transmitted and received via a transmission medium. For example, if software is transmitted from a web page, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0273] The information, signals, etc. 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, etc. that may be referred to in the entire description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0274] In addition, the terms used in this disclosure and those 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 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 names, 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 accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a portion or the entire coverage area of ​​at least one of the base station and base station subsystem that provide communication services within the coverage area.

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

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

[0282] For mobile stations, those skilled in the art sometimes also use the following terms to refer to them: 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. Furthermore, 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. Furthermore, of course, this also includes situations where the mobile body is stationary. Examples of mobile bodies include, but are not limited to, vehicles, transport vehicles, cars, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, two-wheeled trailers (rear cars), rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, Drones (registered trademark), multi-rotor helicopters, quadcopters, balloons, and objects mounted thereon. Furthermore, the mobile body may also be a mobile body that moves autonomously based on operating instructions. It may be a means of transportation (such as a car, airplane, etc.), a mobile body that moves unmanned (such as a drone, self-driving car, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. 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] In addition, the base station in the present disclosure can also be replaced by a user terminal. For example, the various forms / implementations of the present disclosure can also be applied to a structure in which the communication between the base station and the user terminal is replaced by the communication between multiple terminals 20 (for example, it can also be called D2D (Device-to-Device: device to device), V2X (Vehicle-to-Everything: vehicle to everything system), etc.). In this case, it can also be set as a structure in which the terminal 20 has the functions of the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (such as "side"). For example, uplink channels, downlink channels, etc. can also be replaced by 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 also 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 "determining" may include considering as "judging" or "determining" an event that involves judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching a table, database, or other data structure), or ascertaining. Furthermore, "determining" and "determining" may include considering as "judging" or "determining" an event that involves receiving (e.g., receiving information), transmitting (e.g., transmitting information), inputting, outputting, or accessing (e.g., accessing data in a memory). Furthermore, "determining" and "determining" may include considering as "resolving," selecting, choosing, establishing, or comparing an event that involves "resolving" or "determining" an event that involves "resolving," selecting, choosing, establishing, or comparing. That is, "judgment" and "decision" can include matters where certain actions are considered to have been "judged" or "decided." In addition, "judgment (decision)" can also be replaced by "assuming (assuming)," "expecting (expecting)", "considering (considering)" and the like.

[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 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 applied 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 terms "first," "second," etc., as used in this disclosure, does not necessarily limit the number or order of these elements. These terms 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 mean that only two elements can be used or that the first element must precede the second element in any form.

[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 be a fixed time length (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, the 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, specific windowing performed by the transceiver in the time domain, and the like.

[0295] In the time domain, 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.) A slot may be a time unit based on a parameter set.

[0296] A time slot may contain multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in time units larger than a mini-slot may be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be 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 mini-slot 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 mini-slot, or the like, 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 such as scheduling and link adaptation. 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] In addition, when one time slot or one mini-time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can be the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) that constitute the minimum time unit for scheduling can be controlled.

[0302] A TTI with a time length of 1 ms may also be 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, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a time slot, etc.

[0303] In addition, for long TTI (for example, normal TTI, subframe, etc.), it can be replaced with a TTI with a time length of more than 1ms, and for short TTI (for example, shortened TTI, etc.), it can be replaced with a TTI with a TTI length smaller than long TTI (longTTI) and greater than 1ms.

[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 contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on 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 referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a parameter set within a carrier. Common RBs can be identified by their index relative to the common reference point of the carrier. PR RBs can be defined within a BWP and numbered within that BWP.

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

[0310] At least one of the set BWPs may be active, and the UE may not assume that a predetermined signal / channel is transmitted or received outside 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 within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a 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 a 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] Each form / implementation described in this disclosure may be used individually or in combination, and may be switched between them depending on the execution. Furthermore, notification of predetermined information (e.g., notification of "yes X") is not limited to being performed explicitly, but may also be performed implicitly (e.g., not notifying the predetermined 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 Station

[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 device

[0332] 1005: Input device

[0333] 1006: Output device

[0334] 2001: Vehicles

[0335] 2002: Drive Department

[0336] 2003: Steering

[0337] 2004: Accelerator pedal

[0338] 2005: Brake pedal

[0339] 2006: Gear Shifter

[0340] 2007: Front wheel

[0341] 2008: Rear wheel

[0342] 2009: Axles

[0343] 2010: Electronic Control Department

[0344] 2012: Information Services Department

[0345] 2013: Communication Module

[0346] 2021: Current Sensors

[0347] 2022: Speed ​​Sensor

[0348] 2023: Air pressure sensor

[0349] 2024: Vehicle speed sensor

[0350] 2025: Accelerometers

[0351] 2026: Brake pedal sensor

[0352] 2027: Gearshift sensor

[0353] 2028: Object detection sensors

[0354] 2029: Accelerator pedal sensor

[0355] 2030: Driving Assistance Systems Division

[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 is configured to send a CSI report to the base station based on the measurement result.

2. The terminal according to claim 1, wherein: The control unit executes a plurality of measurements validating different numbers of ports based on the CSI report configuration.

3. The terminal according to claim 1, wherein: The control unit determines the number of ports to be used for the measurement based on a coefficient of the number of activated antennas included in the CSI report configuration. The terminal according to claim 1 , wherein: The receiving unit receives, from the base station, a CSI report configuration to which a plurality of assumptions regarding different powers are applied. The terminal according to claim 4 , wherein: The control unit performs a plurality of measurements to which different power offsets are applied based on the CSI report configuration.

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 measurements based on the CSI reporting configuration; and Based on the measurement result, a CSI report is sent to the base station.

Images