Terminal, communication method, and wireless communication system

Abstract

A terminal is provided with: a reception unit that receives, from a base station, a signal that specifies the validity or invalidity of a CSI report including a CSI selected from among a plurality of pieces of CSI channel state information; and a transmission unit that, when the activation is specified by the signal, performs the CSI report including information indicating a CSI selected from among a plurality of pieces of CSI.

Description

Technical Field

[0001] The present invention relates to a terminal, a communication method and 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 V17.4.0 (2023-03)

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

[0008] Problems to be solved by the invention

[0009] To achieve energy conservation in networks, CSI (Channel State Information) reporting, which has different features from CSI reporting in conventional standards, is under study. However, there is no definition of a method for achieving CSI reporting for network energy conservation.

[0010] The present invention has been made in view of the above-mentioned problems, and in a wireless communication system, it is possible to appropriately perform mapping of CSI reporting information (for example, CSI content) for energy saving of the network.

[0011] Means for solving problems

[0012] The terminal in this embodiment includes: a receiving unit that receives a signal from a base station specifying the activation or deactivation of a CSI report, wherein the CSI report includes CSI selected from multiple CSIs, i.e., channel state information; and a sending unit that, when the activation is specified by the signal, performs the CSI report including information indicating the CSI selected from the multiple CSIs.

[0013] Effects of the Invention

[0014] According to the disclosed technology, in a wireless communication system, CSI reporting for energy saving of the network can be appropriately performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A diagram showing a configuration example of a wireless communication system.

[0016] Figure 2A This is a diagram showing an example of CPU (CSI Process Unit) occupied in periodic / semi-persistent CSI.

[0017] Figure 2B This is a diagram showing an example of CPU usage in aperiodic CSI reporting.

[0018] Figure 3A This is a diagram showing an example of an activation period in a periodic / semi-persistent CSI-RS.

[0019] Figure 3B This is a diagram showing an example of an activation period in a conventional aperiodic CSI-RS.

[0020] Figure 4 This is a diagram illustrating a calculation formula for priority applied to CSI reporting and parameters in the calculation formula.

[0021] Figure 5 This is a diagram showing an example of the structure of subband CSI on the PUSCH.

[0022] Figure 6 This is a diagram showing an example of the operation performed by the terminal in Example 1 of this embodiment.

[0023] Figure 7 This is a diagram showing an example of mapping of SCI in wideband CSI in this embodiment.

[0024] Figure 8 This is a diagram showing an example of mapping of SCI in subband CSI in this embodiment.

[0025] Figure 9 This is a diagram showing an example of the operation performed by the terminal in Example 2 of this embodiment.

[0026] Figure 10 This is a diagram for explaining the adaptation types (Adaptation Types) in this embodiment.

[0027] Figure 11 This is an example of a table showing whether the contents of a plurality of CSIs in this embodiment are the same or different.

[0028] Figure 12 This is a diagram showing an example of joint coding for collectively reporting two CSIs in this embodiment.

[0029] Figure 13 This is a diagram showing an example of joint coding for collectively reporting three CSIs in this embodiment.

[0030] Figure 14 This is a diagram showing an example of mode 1 mapping in this embodiment.

[0031] Figure 15 This is a diagram showing an example of mode 2 mapping in this embodiment.

[0032] Figure 16 This is a diagram showing an example of wideband CSI mapping (mode 2) in this embodiment.

[0033] Figure 17 This is a diagram showing an example of subband CSI mapping (mode 2) including part 1 (Part 1) in this embodiment.

[0034] Figure 18 This is a diagram showing an example of sub-band CSI mapping (mode 2) including Part 2 wideband in this embodiment.

[0035] Figure 19 This is a diagram showing an example of subband CSI mapping (mode 2) including Part 2 subband in this embodiment.

[0036] Figure 20 This is a diagram showing an example of the functional configuration of the base station 10 in this embodiment.

[0037] Figure 21 This is a diagram showing an example of the functional configuration of the terminal 20 in this embodiment.

[0038] Figure 22 This is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 in this embodiment.

[0039] Figure 23 This is a diagram showing an example of the structure of a vehicle 2001 in this embodiment. DETAILED DESCRIPTION

[0040] 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.

[0041] In the operation of the wireless communication system in this embodiment, existing technologies are appropriately used. This existing technology is, for example, but not limited to, existing LTE. Furthermore, unless otherwise specified, the term "LTE" used in this specification has a broad meaning that includes LTE-Advanced and later generations (e.g., NR).

[0042] In addition, in the embodiments of the present invention described below, the terms 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), PUSCH (Physical Uplink Shared Channel), etc. used in existing LTE are used. These are for convenience of description, and the same signals, functions, etc. can 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 recorded as "NR-".

[0043] 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 another method (eg, Flexible Duplex, etc.).

[0044] 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 .

[0045] Figure 1 1 is a diagram showing a configuration example (1) of a wireless communication system in this embodiment. Figure 1 As shown, the wireless communication system in this embodiment 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.

[0046] 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 a synchronization signal 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 1As shown, the base station 10 sends a control signal or data to the terminal 20 via DL (Downlink), and receives a control signal or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output)-based communications to DL or UL. In addition, the base station 10 and the terminal 20 can also communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) based on CA (Carrier Aggregation). Furthermore, the terminal 20 can also communicate via the primary cell of the base station 10 based on DC (Dual Connectivity) and the primary and secondary cell group cells (PSCell: Primary SCG Cell) of other base stations 10.

[0047] 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.

[0048] 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.

[0049] Figure 2A This is a diagram showing an example of CPU (CSI Process Unit) occupation in conventional periodic / semi-persistent CSI. Figure 2B This is a diagram showing an example of CPU usage in conventional aperiodic CSI reporting.

[0050] Figure 3AThis is a diagram showing an example of an activation period in a conventional periodic / semi-persistent CSI-RS. Figure 3B This is a diagram showing an example of an activation period in a conventional aperiodic CSI-RS.

[0051] Figure 4 This is a diagram illustrating the calculation formula and parameters used in the calculation formula for the priority of CSI reporting. Figure 4 The formula Pri shown iCSI (y,k,c,s)=2·N cells ·M S y+N cells ·M S k+M S c+s defines the priority of the CSI report. Here, y represents the CSI type. CSI types include aperiodic CSI reports on PUSCH, semi-persistent CSI reports on PUSCH, semi-persistent CSI reports on PUCCH, and periodic CSI reports on PUCCH. k represents the CSI content. iCSI The smaller the value of (y,k,c,s), the higher the priority of the CSI report.

[0052] Figure 5 This is a diagram showing an example of the structure of subband CSI on the PUSCH.

[0053] Conventionally, there has been no explicit consideration of a CSI reporting method for reducing the payload of a CSI quantity (CSI reporting target parameter) for energy saving in a transmission network.

[0054] In this embodiment, CSI overhead (e.g., payload of CSI reports) is reduced for network energy saving, and a mapping method for CSI quantities in selected CSI reporting and joint CSI reporting, which was not previously specified, is clarified.

[0055] (Example 1)

[0056] Example 1 of this embodiment provides a method for reporting the reporting content and mapping order of CSI selected from a plurality of CSIs.

[0057] An example of the operation of the terminal 20 in Example 1 of this embodiment is described below. Figure 6 As shown, in step S11, the terminal 20 receives RRC / MAC CE / DCI signaling indicating the activation or deactivation of the selected CSI reporting. In step S12, it is determined whether the received signal indicates the activation or deactivation of the selected CSI reporting. If the received signal indicates the activation of the selected CSI reporting, in step S13, the terminal 20 performs CSI reporting including the selected CSI indicator (SCI). On the other hand, in step S12, if the received signal indicates the deactivation of the selected CSI reporting, the terminal 20 performs CSI reporting without including the SCI.

[0058] The following options are available for indicating whether or not the selected CSI reporting is enabled or disabled.

[0059] The enabling / disabling of the selected CSI reporting (selected CSI reporting) is indicated by a separate indicator SCIEnabled=true, and the selected CSI reporting is enabled.

[0060] The activation / inactivation of the selected CSI reporting is indicated by an indicator representing a reporting object parameter (report quantity) such as sci-CRI-RI-PMI-CQI. When the reporting object parameter (quantity) is set, the terminal 20 reports the SCI and other CSI (CRI / RI / PMI / CQI) of the selected CSI reporting.

[0061] SCI indicates the index of CSI selected from a plurality of CSIs to be reported. SCI is any of the following.

[0062] Option 1 (Alt. 1): SCI is the index / ID of the CSI report sub-configurations / CSI resources of the selected CSI within the CSI report configuration (e.g., CSI-ReportConfig). The maximum number of sub-configurations / CSI resources within a CSI report configuration is N.

[0063] Option 2 (Alt. 2): The SCI is the index / ID of the CSI report sub-configurations / CSI resource selected from a list of CSI or CSI report candidates. This list can be newly defined and configured via RRC / MAC CE / DCI signaling. The maximum number of candidates in the list is N.

[0064] In Option 1 or Option 2 (Alt 1 or Alt 2), N is equal to 2^n (n = 0, 1, 2, 3, ...) or another integer. N can take one or more possible values. The value of N can be set by the base station 10 (gNB) or indicated by the terminal 20 as a terminal capability (UE capability).

[0065] The size of the SCI is n bits when N is equal to 2^n (n=0, 1, 2, 3, ...), and is [log2N] bits when N is equal to other integers.

[0066] When reporting SCI, SCI can be mapped to the beginning / end / other positions of all CSI fields. For example, when wideband PMI / CQI reporting is configured, the SCI can be mapped to the beginning / end / other positions of all CSI fields. Figure 7 When subband PMI / CQI report is configured, the following can be used: Figure 8 In CSI part 2 wideband / subband, the mapping method specified in the existing standard can be reused.

[0067] (Example 2)

[0068] According to Example 2 of this embodiment, as Figure 9As shown, the terminal 20 can report the reporting content and mapping order of multiple CSIs through a joint CSI report.

[0069] N is the maximum number of CSIs / spatial or power assumptions / CSI reporting configurations or sub-configurations that can be reported via a joint CSI report. One or more values ​​can be set for N. The value of N can be set by the base station 10 (gNB) or indicated by the terminal 20 as a UE capability.

[0070] (Example 2-1)

[0071] In order to save the payload of a specific reporting quantity parameter for CSI reported through a joint CSI report, the following method may be applied.

[0072] Option 3-2-1-1 (Alt. 3-2-1-1): If part or all of the report content has not changed, only one report is required. Figure 10 This is a diagram for explaining adaptation types.

[0073] For example, Figure 11 As shown in FIG, when Type 1 Adaptation is used and the CRIs of multiple CSIs are the same, only one CRI may be reported.

[0074] For example, Figure 11 As shown in FIG, when Type 1 Adaptation is used and the CRI, RI, and PMI of multiple CSIs are the same, only one CRI, RI, and PMI may be reported.

[0075] Option 3-2-1-2 (Alt. 3-2-1-2): CSI content can be reported using a joint coding field.

[0076] For example, when Type 1 Adaptation is used, the reported RIs may decrease as the number of ports decreases, and multiple RIs may be concentrated for encoding. Figure 12 This is a diagram showing an example of joint coding for collectively reporting two CSIs. Figure 13This is a diagram showing an example of joint coding for collectively reporting three CSIs.

[0077] Option 3-2-1-3 (Alt. 3-2-1-3): The difference between multiple CSIs can be reported.

[0078] For example, in the case of CQI reporting, the CQI difference between a certain CQI and other compared CQIs may be reported together with the “highest power level / previous ordered CSI / selected CSI”.

[0079] In case of "first / selected / highest power level" CSI, the CQI may be reported as legacy.

[0080] Regarding other CSI, wideband differential CQI can be reported compared to the "previous / first / selected / highest power level" CSI, and subband differential CQI compared to the wideband CQI is reported as legacy.

[0081] Wideband differential CQI can be calculated based on the following formula.

[0082] Wideband differential CQI = wideband CQI index of the CSI - wideband CQI index of the [previous / first / selected / highest power level] CSI

[0083] Option 1 (Alt. 1): Apply the same TB index in the above formula to calculate the wideband differential CQI.

[0084] Wideband differential CQI of first TB = wideband CQI index of first TB of the CSI - wideband CQI index of first TB of the [previous / first / selected / highest power level] CSI

[0085] Wideband differential CQI of second TB = wideband CQI index of second TB of the CSI - wideband CQI index of second TB of the [previous / first / selected / highest power level] CSI

[0086] Option 2 (Alt. 2): Calculate the same or different TB index and wideband differential CQI in the above equation. For example, when there is only one TB, the wideband CQI index of the "previous / first / selected / highest power level" CSI is always assumed to be the first TB.

[0087] Wideband differential CQI of first TB = wideband CQI index of first TB of the CSI - wideband CQI index of first TB of the [previous / first / selected / highest power level] CSI

[0088] Wideband differential CQI of second TB = wideband CQI index of second TB of the CSI - wideband CQI index of first TB of the [previous / first / selected / highest power level] CSI

[0089] The offset step size of the wideband differential CQI can be designed according to the level of power reduction or the level of shutting down the antenna elements.

[0090] For example, when the power of CSI is arranged by reducing the power or the number of antenna elements / ports, the offset step size of the wideband differential CQI with an offset of {0, -1, -2, <= -3} is 2 bits.

[0091] For example, when the CSI is not sorted by power level, the offset step size of the wideband differential CQI with an offset of {0, 1, >= 2, <= -1} is 2 bits.

[0092] (Example 2-2)

[0093] When multiple CSI(s) are reported through a joint CSI report, the CSI may be mapped to the PUSCH / PUCCH in the following order.

[0094] Mode 1: If Figure 14 As shown, CSI can be mapped for each CSI in a defined order. When all CSI quantities of one CSI are mapped, the next CSI is moved on.

[0095] Mode 2: If Figure 15 As shown, CSI can be mapped for each CSI quantity. When all CSI of a specific quantity type is mapped, the next quantity is moved on.

[0096] The order of CSI in Mode 1 and Mode 2 can be set as follows.

[0097] The order of the CSI in Mode 1 and Mode 2 may be set based on the CSI reporting configuration ID or sub-configuration ID.

[0098] The order of the CSI of Mode 1 and Mode 2 may be set based on the index of the CSI report configuration in the list of CSI report candidates.

[0099] The order of the CSI of Mode 1 and Mode 2 can be set based on the port number / antenna element number / power level.

[0100] For example, CSI may be mapped initially with a large port assumption, and then with a small port assumption. In the case of reporting 2 / 4 / 8-port CSI with Type 1 adaptation, the order is 8-port CSI, 4-port CSI, and 2-port CSI.

[0101] For example, CSI of a high power level may be mapped initially, followed by mapping CSI of a low power level.

[0102] For example, the payload reduction method of Example 2-1 can be applied.

[0103] exist Figure 16-19 An example of CSI mapping in this embodiment is shown. Figure 16 An example of wideband CSI mapping (mode 2) is shown. Figure 17 An example of subband CSI mapping (mode 2) including part 1 is shown. Figure 18 An example of subband CSI mapping (mode 2) including Part 2 wideband is shown. Figure 19 An example of subband CSI mapping (mode 2) including Part 2 subband is shown.

[0104] (Example 3)

[0105] A predetermined restriction may be applied to the CSI of the NW ES.

[0106] For "multiple CSI(s)are reported in a joint CSI report / selected CSI is reported from multiple CSI(s) / CSI report with sub-configurations corresponding to multiple spatial or power assumptions / CSIs derived on common CSI resource", the following restrictions may apply.

[0107] Only one or more of the reporting time attributes of "A-CSI / P-CSI / SP-CSI of PUSCH / SP-CSI of PUCCH" are supported.

[0108] Only "PUSCH / PUCCH / PUSCH and PUCCH both" reporting channels are supported.

[0109] Only the reporting frequency granularity of "wideband / both wideband and subband" is supported (-ies).

[0110] Only the CSI reporting type of "Type I CSI / both Type I and II" is supported.

[0111] Only one or more of the following codebook types are supported: typeI-SinglePanel / typeI-MultiPanel / typeII / typeII-PortSelection / typeII-r16 / typeII-PortSelection-r16 / typeI-SinglePanel-Group1-r17 / typeI-SinglePanel-Group1-r17 / typeII-PortSelection-r17.

[0112] Only one or more of "CSIs measured on the same CSI resource / CSI with different spatial assumptions but the same power assumption / CSI with the same spatial assumption but different power assumptions" is supported. Here, the different spatial assumptions can be as follows.

[0113] Option 1 (Alt. 1): Based only on the assumption that the port numbers are different for Type 1 adaptation

[0114] Option 2 (Alt.2): Only the number of antenna elements of Type 2 adaptation is different. Option 3 (Alt.3): Includes both Option 1 and Option 2.

[0115] (Device Structure)

[0116] 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.

[0117] <Base Station 10>

[0118] Figure 20 FIG. 1 is a diagram showing an example of the functional configuration of the base station 10 in this embodiment. Figure 20 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 20 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 in this embodiment can be performed.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] <Terminal 20>

[0123] Figure 21 1 is a diagram showing an example of the functional configuration of the terminal 20 in this embodiment. Figure 21 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Figure 21 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 in this embodiment can be performed.

[0124] 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, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0125] 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.

[0126] 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.

[0127] (Hardware Structure)

[0128] The block diagram used in the description of the above embodiment ( Figure 20 and Figure 21) 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.

[0129] 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.

[0130] 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 22 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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 20 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 21 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.

[0135] 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.

[0136] The auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (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, and the like. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0137] 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.

[0138] 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).

[0139] 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.

[0140] 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.

[0141] Figure 23 2001 shows a structural example of a vehicle. Figure 23 As 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.

[0142] 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.

[0143] 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).

[0144] 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.

[0145] 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.).

[0146] The 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, the driving assistance system unit 2030 sends and receives various information via the communication module 2013 to implement driving assistance functions or autonomous driving functions.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] (Summary of Implementation Methods)

[0152] As described above, the terminal in this embodiment includes: a receiving unit that receives a signal from a base station specifying the activation or deactivation of a CSI report, wherein the CSI report includes CSI selected from a plurality of CSIs; and a sending unit that, when the activation is specified by the signal, performs the CSI report including information indicating the CSI selected from the plurality of CSIs.

[0153] The communication method performed by a terminal in this embodiment includes the following steps: receiving a signal from a base station specifying the activation or deactivation of a CSI report, wherein the CSI report includes CSI selected from a plurality of CSIs; and when the activation is specified by the signal, performing the CSI report including information indicating the CSI selected from the plurality of CSIs.

[0154] The wireless communication system in this embodiment includes a terminal and a base station, wherein the base station transmits a signal specifying the activation or deactivation of a CSI report, wherein the CSI report includes CSI selected from a plurality of CSIs. The terminal receives the signal from the base station and, when the activation is specified by the signal, performs the CSI report including information indicating the CSI selected from the plurality of CSIs.

[0155] With the above-described configuration, CSI reporting including CSI selected from a plurality of CSIs (selected CSI reporting) can be appropriately performed for energy saving of the network.

[0156] The information indicating the selected CSI may be mapped to the beginning or the end of all CSI fields. According to this structure, the SCI in the selected CSI reporting can be appropriately mapped.

[0157] Alternatively, the transmitting unit may perform a CSI report including multiple CSIs, and may map a reporting object parameter for each CSI field included in the CSI report including multiple CSIs, or may perform mapping for each reporting object parameter. This structure clarifies the mapping method for CSI content in joint CSI reporting.

[0158] (Supplementary Implementation Methods)

[0159] 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.

[0160] 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.

[0161] 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 802.16 (WiMAX (registered trademark)), IEEE At least one of 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems that are expanded, modified, created, or specified based on these systems. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) may also be used.

[0162] 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.

[0163] 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).

[0164] 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.

[0165] 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.

[0166] 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).

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0172] 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.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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., sending 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)", etc.

[0183] 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.

[0184] The reference signal may be referred to as RS (Reference Signal) for short, or may be called a pilot according to the applied standard.

[0185] 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.”

[0186] 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.

[0187] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section,” “circuit,” “device,” or the like.

[0188] 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.

[0189] 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.

[0190] 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.

[0191] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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 particular parameter set within a carrier. Common RBs can be identified by their index relative to the common reference point for that carrier. PRBs can be defined within a BWP and numbered within that BWP.

[0205] 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.

[0206] At least one of the configured BWPs may be active, and the UE may not assume that it will transmit or receive predetermined signals / channels outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

[0207] 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.

[0208] 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.

[0209] 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."

[0210] 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).

[0211] 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.

[0212] Description of labels

[0213] 10: Base Station

[0214] 110: Sending Department

[0215] 120: Receiving Department

[0216] 130: Setting Department

[0217] 140: Control Department

[0218] 20: Terminal

[0219] 210: Sending Department

[0220] 220: Receiving Department

[0221] 230: Setting Department

[0222] 240: Control Department

[0223] 30: Core Network

[0224] 1001: Processor

[0225] 1002: Storage device

[0226] 1003: Auxiliary storage device

[0227] 1004: Communication device

[0228] 1005: Input device

[0229] 1006: Output device

[0230] 2001: Vehicles

[0231] 2002: Drive Department

[0232] 2003: Steering

[0233] 2004: Accelerator pedal

[0234] 2005: Brake pedal

[0235] 2006: Gear Shifter

[0236] 2007: Front wheel

[0237] 2008: Rear wheel

[0238] 2009: Axles

[0239] 2010: Electronic Control Department

[0240] 2012: Information Services Department

[0241] 2013: Communication Module

[0242] 2021: Current Sensors

[0243] 2022: Speed ​​Sensor

[0244] 2023: Air pressure sensor

[0245] 2024: Vehicle speed sensor

[0246] 2025: Accelerometers

[0247] 2026: Brake pedal sensor

[0248] 2027: Gearshift sensor

[0249] 2028: Object detection sensors

[0250] 2029: Accelerator pedal sensor

[0251] 2030: Driving Assistance Systems Division

[0252] 2031: Microprocessor

[0253] 2032: Memory (ROM, RAM)

[0254] 2033: Communication port (IO port)

Claims

1. A terminal comprising: a receiving unit that receives, from a base station, a signal designating the validation or invalidation of a CSI report, the CSI report including CSI selected from a plurality of CSIs, i.e., channel state information; and A transmitting unit that, when the activation is designated by the signal, performs the CSI report including information indicating CSI selected from a plurality of CSIs.

2. The terminal according to claim 1, wherein The information indicating the selected CSI is mapped to the beginning or the end of all CSI fields.

3. The terminal according to claim 1, wherein: The sending unit performs a CIS report including a plurality of CSIs, In the CSI field included in the CSI report including the plurality of CSIs, a reporting object parameter is mapped for each of the plurality of CSIs or mapping is performed for each reporting object parameter.

4. A communication method, executed by a terminal, comprising the following steps: receiving a signal from a base station specifying the activation or deactivation of a CSI report, the CSI report including CSI selected from a plurality of CSIs, i.e., channel state information; and When the activation is designated by the signal, the CSI report including information indicating the CSI selected from a plurality of CSIs is performed.

5. A wireless communication system comprising a terminal and a base station, wherein: The base station transmits a signal specifying the activation or deactivation of a CSI report, wherein the CSI report includes CSI selected from a plurality of CSIs, i.e., channel state information. The terminal receives the signal from the base station and, when the activation is designated by the signal, performs the CSI report including information indicating CSI selected from a plurality of CSIs.

Images