Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit for generating a plurality of channel state information parts, i.e., a plurality of CSI parts, wherein at least one of the plurality of CSI parts includes a first field indicating each of a plurality of precoding matrix indicators, i.e., PMIs, and a second field indicating a delay corresponding to the PMIs; and a transmitting unit for transmitting the plurality of CSI parts. Thus, an increase in UL overhead can be suppressed and a decrease in the reliability of CSI can be prevented.

Description

Technical Field

[0001] The present disclosure relates to a terminal, a wireless communication method, a base station, and a system in a next generation mobile communication system. Background Art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9 of the Third Generation Partnership Project (3GPP)).

[0003] Successor systems of LTE (for example, also referred to as fifth generation mobile communication system (5G), 5G+(plus), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In Rel.15NR, the frequency granularity for reporting Channel State Information (CSI) supports wideband and subband.

[0009] Here, the broadband is the entire band domain that is the reporting object of CSI, for example, a certain carrier (also called component carrier (CC), cell, serving cell, etc.). A subband is a part of a broadband, for example, one or more physical resource blocks (Physical Resource Block (PRB) or resource block (RB)). The size of the subband (subband size, for example, the number of PRBs) can also be determined according to the size of the broadband (broadband size, for example, the number of PRBs).

[0010] In future wireless communication systems (for example, NR after Rel.16), it is also envisioned that at least one of a wide bandwidth (for example, a bandwidth wider than Rel.15NR) and a high frequency band (for example, a frequency band higher than one of 7.125GHz, 24.25GHz, and 52.6GHz, or a frequency band higher than Rel.15NR) can be utilized.

[0011] However, in future wireless communication systems, if the broadband to which CSI is reported is broadbandized, the subband size that depends on the broadband size becomes larger than the coherence bandwidth, resulting in a concern that the reliability of CSI will deteriorate. On the other hand, in a broadbandized broadband, if the subband size is to be made sufficiently smaller than the coherence bandwidth, there is a concern that the uplink (UL) overhead will increase.

[0012] Therefore, one of the objects of the present disclosure is to provide a terminal and a wireless communication method that can suppress an increase in UL overhead and prevent a decrease in the reliability of CSI.

[0013] Means for solving problems

[0014] A terminal involved in one embodiment of the present disclosure comprises: a control unit, which generates multiple channel state information parts, i.e., multiple CSI parts, wherein at least one of the multiple CSI parts includes a first field representing each of multiple precoding matrix indicators, i.e., PMIs, and a second field representing a delay corresponding to the PMI; and a sending unit, which sends the multiple CSI parts.

[0015] Effects of the Invention

[0016] According to one embodiment of the present disclosure, it is possible to suppress an increase in UL overhead and prevent a decrease in the reliability of CSI. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a diagram showing an example of the operation of CSI reporting.

[0018] Figure 2A And 2B is a diagram showing an example of feedback of broadband information.

[0019] Figure 3 This is a diagram showing an example of a precoder based on wideband information.

[0020] Figure 4 It is a diagram showing another example of a precoder based on broadband information.

[0021] Figure 5 This is a diagram showing still another example of a precoder based on broadband information.

[0022] Figure 6 This is a diagram showing an example of the structure of a CSI report in UCI.

[0023] Figure 7 This is a diagram showing an example of CSI report #n involved in Implementation Example 1.

[0024] Figure 8 This is a diagram showing another example of CSI report #n involved in Implementation Example 1.

[0025] Fig. 9 This is a diagram showing an example of mapping of the CSI report involved in Implementation Example 1.

[0026] Fig.10 This is a diagram showing an example of CSI part 1 of CSI report #n involved in implementation mode 2-2-1.

[0027] Fig.11 This is a diagram showing an example of the CSI part 2 of the CSI report #n involved in implementation mode 2-2-1.

[0028] Fig. 12A as well as Fig. 12B This is a diagram showing an example of mapping of the CSI report involved in Implementation 2-2-1.

[0029] Fig.13 This is a diagram showing an example of UCI encoding and rate matching involved in implementation mode 2-2-1.

[0030] Fig.14 This is a diagram showing an example of CSI part 1 of CSI report #n involved in implementation mode 2-2-2.

[0031] Fig.15 This is a diagram showing an example of CSI part 2 of CSI report #n involved in implementation mode 2-2-2.

[0032] Fig.16 This is a diagram showing an example of mapping of the CSI part 1 involved in implementation mode 2-2-2.

[0033] Fig.17 This is a diagram showing an example of mapping of CSI part 2 involved in implementation mode 2-2-2.

[0034] Fig.18 This is a diagram showing an example of UCI coding and rate matching involved in implementation mode 2-2-2.

[0035] Fig.19 This is a diagram showing an example of CSI part 1 of CSI report #n involved in implementation mode 2-2-3-1.

[0036] Fig. 20A as well as Fig. 20B This is a diagram showing an example of CSI part 2 of CSI report #n involved in implementation mode 2-2-3-1.

[0037] Fig.21 This is a diagram showing an example of CSI part 1 of CSI report #n involved in implementation mode 2-2-3-2.

[0038] Fig. 22 This is a diagram showing an example of wideband report #1 of CSI part 2 of CSI report #n according to implementation mode 2-2-3-2.

[0039] Fig.23A as well as Fig. 23B This is a diagram showing an example of wideband reports #q-1 and #q of the CSI part 2 of the CSI report #n involved in implementation mode 2-2-3-2.

[0040] Fig.24 This is a diagram showing an example of mapping of the CSI part 1 involved in implementation mode 2-2-3.

[0041] Fig.25 This is a diagram showing an example of mapping of the CSI part 2 involved in implementation mode 2-2-3.

[0042] Fig.26 This is a diagram showing an example of UCI encoding and rate matching involved in implementation mode 2-2-3.

[0043] Fig. 27 This is a diagram showing an example of the CSI part 1 of the CSI report #n involved in Implementation 3-1.

[0044] Fig.28 This is a diagram showing an example of CSI part 1 of CSI report #n involved in implementation mode 3-2-1.

[0045] Fig.29A as well as Fig.29BThis is a diagram showing an example of CSI part 2 and CSI part m of CSI report #n involved in implementation mode 3-2-1.

[0046] Fig.30 This is a diagram showing an example of the CSI part 1 of the CSI report #n involved in implementation mode 3-2-2.

[0047] Fig.31 This is a diagram showing an example of the CSI part 2 of the CSI report #n involved in implementation mode 3-2-2.

[0048] Fig.32A as well as Fig.32B This is a diagram showing an example of CSI part m-1 and CSI part m of CSI report #n involved in implementation mode 3-2-2.

[0049] Fig.33 This is a diagram showing an example of CSI part 3 of CSI report #n of three parts of CSI involved in implementation mode 3-2-2.

[0050] Fig.34A as well as Fig.34B This is a diagram showing an example of mapping of the CSI report involved in Implementation Example 3.

[0051] Fig.35 This is a diagram showing an example of UCI encoding and rate matching involved in Implementation Example 3.

[0052] Fig.36 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0053] Fig.37 This is a diagram showing an example of the structure of a base station involved in one embodiment.

[0054] Fig.38 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0055] Fig.39 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0056] (CSI report or reporting)

[0057] In Rel.15NR, a terminal (also referred to as a user terminal, user equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or resources used for the RS), and sends (also referred to as reporting, feedback, etc.) the generated CSI to a network (e.g., a base station). The CSI can also be sent to a base station using, for example, an uplink control channel (e.g., a physical uplink control channel (Physical Uplink Control Channel (PUCCH))) or an uplink shared channel (e.g., a physical uplink shared channel (Physical Uplink Shared Channel (PUSCH))).

[0058] The RS used to generate CSI can be, for example, at least one of the Channel State Information Reference Signal (CSI-RS), the Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, the Synchronization Signal (SS) and the DeModulation Reference Signal (DMRS).

[0059] The CSI-RS may also include at least one of a non-zero power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS / PBCH block is a block including the SS and the PBCH (and the corresponding DMRS), and may also be referred to as an SS block (SSB), etc. In addition, the SS may also include at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0060] CSI may also include at least one parameter (CSI parameter) such as Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal-to-Noise and Interference Ratio or Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), etc.

[0061] The UE may also receive information related to CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may also be, for example, "CSI-ReportConfig" of the information element (IE) of the Radio Resource Control (RRC). In addition, in the present disclosure, RRC IE may also be interpreted as RRC parameters, high-layer parameters, etc.

[0062] The report configuration information (eg, "CSI-ReportConfig" of RRC IE) may include, for example, at least one of the following.

[0063] ■ Information related to the type of CSI report (report type information, such as "reportConfigType" of RRC IE)

[0064] ■ Information related to one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, for example, "reportQuantity" of RRC IE)

[0065] ■ Information related to the RS resource used to generate the quantity (the CSI parameter) (resource information, for example, "CSI-ResourceConfigId" of RRCIE)

[0066] ■ Information related to the frequency domain to be reported by CSI (frequency domain information, for example, "reportFreqConfiguration" of RRC IE)

[0067] For example, the report type information may also represent (indicate) a periodic CSI (Periodic CSI (P-CSI)) report, an aperiodic CSI (Aperiodic CSI (A-CSI)) report, or a semi-persistent (Semi-persistent, Semi-Persistent) CSI report (Semi-Persistent CSI (SP-CSI)) report.

[0068] In addition, regarding the reporting amount information, a combination of at least one of the above-mentioned CSI parameters (for example, CRI, RI, PMI, CQI, LI, L1-RSRP, etc.) may also be specified.

[0069] In addition, the resource information may be an ID of a resource for RS. The resource for RS may include, for example, a non-zero-power CSI-RS resource or SSB, and a CSI-IM resource (for example, a zero-power CSI-RS resource).

[0070] In addition, the frequency domain information can also indicate the frequency granularity of the CSI report. The frequency granularity may also include, for example, a broadband and a subband. The broadband is the entire CSI reporting band (entire CSI reporting band). The broadband may be, for example, the entirety of a certain carrier (component carrier (CC), cell, serving cell), or the entirety of the bandwidth part (Bandwidth part (BWP)) within a certain carrier. The broadband may also be interpreted as a CSI reporting band, the entire CSI reporting band, etc.

[0071] In addition, a subband is a part of a wideband and may be composed of one or more resource blocks (Resource Block (RB) or Physical Resource Block (PRB)). The size of a subband may also be determined according to the size of a BWP (the number of PRBs).

[0072] The frequency domain information may also indicate which PMI of the wideband or subband is to be reported (the frequency domain information may also include, for example, the "pmi-FormatIndicator" of the RRC IE for determining either the wideband PMI report or the subband PMI report). The UE may also determine the frequency granularity of the CSI report (i.e., either the wideband PMI report or the subband PMI report) based on at least one of the above-mentioned reporting amount information and the frequency domain information.

[0073] When wideband PMI reporting is configured (determined), one wideband PMI may be reported for the entire CSI reporting band. On the other hand, when subband PMI reporting is configured, a single wideband indication (single wideband indication) i1 may be reported for the entire CSI reporting band, and subband indications (one subband indication) i2 (e.g., subband indications for each subband) of one or more subbands within the entire CSI reporting band may be reported.

[0074] The UE performs channel estimation using the received RS and estimates a channel matrix H. The UE feeds back an index (PMI) determined based on the estimated channel matrix.

[0075] The PMI may also represent a precoder matrix (also referred to as a precoder for short) that the UE considers suitable for downlink (downlink (DL)) transmission to the UE. Each value of the PMI may also correspond to a precoder matrix. A set of PMI values ​​may also correspond to a set of different precoder matrices called a precoder codebook (also referred to as a codebook for short).

[0076] In the spatial domain, the CSI report may also include more than one type of CSI. For example, the CSI may also include at least one of a first type (type 1 CSI) for single beam selection and a second type (type 2 CSI) for multi-beam selection. A single beam may also be interpreted as a single layer, and multi-beams may also be interpreted as multiple beams. In addition, type 1 CSI may not assume multi-user multiple input multiple output (MIMO), and type 2 CSI may also assume multi-user MIMO.

[0077] The above codebook may also include a codebook for type 1 CSI (also referred to as type 1 codebook, etc.) and a codebook for type 2 CSI (also referred to as type 2 codebook, etc.). In addition, type 1 CSI may include type 1 single-panel CSI and type 1 multi-panel CSI, and different codebooks (type 1 single-panel codebook, type 1 multi-panel codebook) may be specified.

[0078] In the present disclosure, type 1 and type I may also be replaced with each other. In the present disclosure, type 2 and type II may also be replaced with each other.

[0079] The uplink control information (UCI) type may also include at least one of a hybrid automatic repeat request acknowledgment (HARQ-ACK), a scheduling request (SR), and CSI. UCI may be carried by PUCCH or by PUSCH.

[0080] In Rel.15NR, UCI can include a CSI part for wideband PMI feedback. CSI report #n contains PMI wideband information if reported.

[0081] In Rel.15NR, UCI can include two CSI parts for subband PMI feedback. CSI part 1 includes wideband PMI information. CSI part 2 includes one wideband PMI information and several subband PMI information. CSI part 1 and CSI part 2 are encoded independently.

[0082] The frequency granularity of CSI reporting as described above depends on the uplink (uplink (UL)) overhead. For example, a specific PUCCH format (e.g., PUCCH format 0 or 2 consisting of 1 or 2 symbols) can support only wideband type 1 CSI. In addition, as the CSI reporting band (e.g., the size of the BWP) becomes larger, the size of the subband becomes larger, thereby preventing an increase in UL overhead caused by reporting CSI (e.g., PMI) for each subband based on the expansion of the CSI reporting band.

[0083] In NRs after Rel.16, it is assumed that a wider bandwidth can be used than in Rel.15NR. In addition, in NRs after Rel.16, it is also assumed that a higher frequency band (for example, a higher frequency band than 7.125GHz, 24.25GHz, 52.6GHz, or a higher frequency band than Rel.15NR) can be used. In addition, a frequency band may also be referred to as a frequency range (FR).

[0084] In Rel.15NR, the subband size becomes smaller than the coherence bandwidth (coherence bandwidth, the bandwidth where the frequency correlation size (amplitude, degree) becomes 90%), so subband-based precoding is effective. For example, in the case where the CSI reporting band is 51PRB, the coherence bandwidth can also be 40PRB and the subband size can be 4 or 8PRB.

[0085] On the other hand, when the CSI reporting band becomes wider than Rel.15NR, the subband size becomes larger than the coherent bandwidth, resulting in a concern that the accuracy of CSI reporting may deteriorate. For example, suppose that when the CSI reporting band is 260PRB, the coherent bandwidth is 12PRB, but the subband size becomes 16 or 32PRB. On the other hand, if the ratio of the CSI reporting band to the subband size is maintained the same as Rel.15NR (if the subband size is sufficiently smaller than the coherent bandwidth), there is a concern that the UL overhead will increase.

[0086] As described above, in future wireless communication systems, an increase in UL overhead and a decrease in CSI reliability will become problems.

[0087] It is assumed that in the case of using a wider bandwidth and at least one of a higher frequency band than Rel.15NR, a precoder using a delay domain (delay domain precoder) contributes more to sparsity (sparsity, sparse case) than a precoder using the spatial domain and frequency domain (space-frequency domain) in Rel.15NR.

[0088] Therefore, the inventors of the present invention have come up with the idea of ​​suppressing the increase of UL overhead and preventing the decrease of CSI reliability by feeding back information used for the delay domain precoder (for example, at least one of the delay information and coefficient information described later) as information (wideband information) related to the entire CSI reporting band (wideband).

[0089] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0090] (Wireless Communication Method)

[0091] In the present disclosure, precoders and precodings may also be interpreted as each other. In addition, precoding vectors, precoding matrices, channel vectors, and channel matrices may also be interpreted as each other. In addition, delay may also be interpreted as the amount of delay (delay amount), etc. In addition, delay domain may also be interpreted as a transform domain described later, or one or more domains defined as the transform domain.

[0092] In the present disclosure, the terms indicator and indication may be interchangeable.

[0093] In addition, in this embodiment, the delay domain precoder is used as the center for explanation, but it is sufficient to use at least the delay domain. For example, it can also be appropriately applied to a precoder using a space and delay domain (space-delay domain) (also called a one-dimensional transform domain precoder, a one-dimensional sparse transform domain precoder, a space-delay domain precoder, etc.), and a precoder using an angle-delay domain (also called a two-dimensional transform domain precoder (2D-TDP), a two-dimensional sparse transform domain precoder (2D sparse TDP), an angle-delay domain precoder, etc.). The angle can also be an arrival angle (angle of arrival) or a radiation angle (angle of departure).

[0094] (Delay Domain Precoder)

[0095] The description will be mainly based on the information for the delay domain precoder fed back as the wideband information.

[0096] <Delay Domain Precoder>

[0097] The delay domain precoder may also be generated (determined) based on at least one of the following parameters.

[0098] ■Coefficient(s) for Q delays g

[0099] ■Delays for the coefficient(s) τ, or quantized delay τ

[0100] Here, the coefficient g may also be defined for each of the Q delays (for each delay). Q×1 In addition, the delay τ used for the coefficient g may also be, for example, τ∈R Q×1 Here, R Q×1It may also be a set of Q unquantized delays τ. In addition, the quantized delay τ may be, for example, τ∈N Q×1 Here, N Q×1 It can also be a set of Q quantized delays τ. In addition, delay can also be interpreted as delay time, time, etc.

[0101] The coefficient g can also be transformed from the delay domain to the frequency domain by multiplying a function of the delay τ corresponding to the coefficient g and adding the multiplication results. The coefficients of the frequency domain (elements of the precoder) can also be obtained (obtained) (derived) by transforming from the delay domain to the frequency domain.

[0102] For example, the precoder d for N subcarriers based on the coefficient g and the delay τ can also be expressed by the following formula 1. In formula 1, Q is the number of delays τ or coefficients g. q is the subscript of the delay τ or the coefficient g, 0≤q≤Q. In addition, n is the subscript of the subcarrier, 0≤n≤N.

[0103] [Mathematical formula 1]

[0104] (Formula 1)

[0105]

[0106] Here, the coefficient of subcarrier #n (nth subcarrier) in delay #q (qth delay) transformed into the frequency domain can also be expressed by the following equation 2. In addition, power normalization can also be expressed by the following equation 3.

[0107] [Mathematical formula 2]

[0108] (Formula 2)

[0109]

[0110] (Formula 3)

[0111]

[0112] For example, when the number of delays Q is 1, 2, or 3, the precoder d of subcarrier #n (0≤n≤N) Q,n They can also be represented by the following formulae 4, 5, and 6, respectively.

[0113] [Mathematical formula 3]

[0114] (Formula 4)

[0115] When Q=1,

[0116] (Equation 5)

[0117] When Q = 2,

[0118] (Equation 6)

[0119] When Q = 3,

[0120] For example, in Equation 4, the number of delays Q = 1. Therefore, the precoder d of sub - carrier #n in delay #0 1,n can also be derived from the multiplication result g0·e of the coefficient g0 for delay #0 (q = 0) and the delay τ0 for coefficient #0 -j2πnτ0 is derived.

[0121] In addition, in Equation 5, the number of delays Q = 1. Therefore, the precoder d of sub - carrier #n in delays #0 and #1 2,n can also be derived from the precoder d of sub - carrier #n in delay #0 1,n and the addition result of the multiplication result g1·e of the coefficient g1 for delay #1 (q = 1) and the delay τ1 for coefficient #1 -j2πnτ1 is derived.

[0122] In addition, in Equation 6, the number of delays Q = 3. Therefore, the precoder d of sub - carrier #n in delays #0 to #2 3,n can also be derived from the precoder d of sub - carrier #n in delays #0 and #1 2,n and the addition result of the multiplication result g2·e of the coefficient g2 for delay #2 (q = 2) and the delay τ2 for coefficient #2 -j2πnτ2 is derived.

[0123] In this way, regarding the coefficient g for the delay - domain precoder, it can also be transformed from the delay domain to the frequency domain by multiplying the coefficient g with the corresponding delay τ. In addition, the coefficient d in the frequency domain can be obtained by adding the transformed coefficient.

[0124] <CSI Report>

[0125] The UE can also feedback one or more pieces of information (one or more wide - band information) related to the entire CSI - report band domain (wide - band) to the base station. Specifically, the UE can also estimate the channel in a certain domain and determine the wide - band information based on the estimated channel (channel matrix).

[0126] For example, the UE can estimate the channel in the spatial and frequency domains and transform the estimated channel matrix to the transform domain. Or, the UE can estimate the channel in the transform domain.

[0127] Here, the so-called transform domain is, for example, a domain for a precoding method (precoding scheme) different from at least one of the time domain, the frequency domain, and the spatial domain. The transform domain may be, for example, one of the following domains or a combination of at least two of them.

[0128] ■Delay domain

[0129] ■Delay-angle domain

[0130] ■Delay - spatial domain

[0131] ■Sparse domain

[0132] ■ A domain transformed or obtained from at least one of the frequency domain and the time domain

[0133] ■A domain associated with at least one of a frequency domain and a time domain

[0134] ■A domain related to at least one of delay and angle

[0135] ■Domains with sparsity

[0136] Channel Estimation in the Spatial and Frequency Domains

[0137] When performing channel estimation in the space-frequency domain, the UE may also transform the estimated channel (channel matrix) to the transform domain, and feed back information (channel information) related to the transformed channel (channel matrix) as the above-mentioned broadband information to the base station.

[0138] Alternatively, the UE may also calculate the precoder in the transform domain based on the channel (channel matrix) estimated in the space-frequency domain, and feed back information related to the transform precoder (precoder information) to the base station as the above-mentioned broadband information.

[0139] Channel Estimation in the Transform Domain

[0140] When channel estimation is performed in the transform domain, the UE may also feed back information (channel information) related to the estimated channel (channel matrix) to the base station.

[0141] Alternatively, the UE may also calculate the precoder in the transform domain based on the channel (channel matrix) estimated in the transform domain, and feed back information related to the transform precoder (precoder information) to the base station as the above-mentioned broadband information.

[0142] 《Determination of Precoder (Channel) Vector》

[0143] The base station can also perform multiplication operations on more than one piece of broadband information (e.g., the above-mentioned channel information or precoder information) to obtain (determine) the precoder vector (or channel vector) for each subcarrier, each PRB, or multiple PRBs.

[0144] Figure 1 FIG. is an example of an operation of a CSI report related to the first method. As Figure 1 shown, in step S101, the base station transmits the above-mentioned RS. In step S102, the UE estimates the channel in a given domain (e.g., the space-frequency domain or the transform domain) based on the RS from the base station.

[0145] The UE determines channel information related to the estimated channel (channel matrix) or precoder information related to the precoder determined based on the estimated channel (channel matrix). Additionally, as described above, when the channel estimation is performed in the space-frequency domain, the channel information or precoder information can also be determined after changing the channel (channel matrix) estimated in the space-frequency domain to the transform domain.

[0146] In step S103, the UE transmits more than one piece of broadband information (e.g., more than one piece of channel information or more than one piece of precoder information). Figure 2A And FIG. 2B is an example of the feedback of the broadband information related to the first method.

[0147] For example, as Figure 2A shown, the UE can also feedback one piece of broadband information and information related to subbands #1 to #k (k > 1) to the base station (which can also be referred to as subband PMI report, etc.).

[0148] Furthermore, as Figure 2B shown, the UE can also feedback multiple pieces of broadband information #1 to #Q (1 < Q << k) to the base station (which can also be referred to as broadband PMI report, etc.).

[0149] In Figure 1 step S104, the base station can also determine the precoding vector (or channel vector) for each subcarrier based on the feedback information from the UE in step S103. The UE can also transmit a downlink shared channel (e.g., Physical Downlink Shared Channel) in the frequency domain and the spatial domain based on the precoding vector (or channel vector).

[0150] Thus, in this embodiment, based on the report configuration information (e.g., "CSI-ReportConfig" of RRC IE), single broadband information and information related to each subband can be reported (e.g., Figure 2A ), multiple broadband information can also be reported (e.g. Figure 2B ). The UE may also decide which one of the single or multiple broadband information to feed back based on at least one of the above-mentioned report quantity information (e.g., "reportQuantity" of RRC IE) and frequency domain information (e.g., "pmi-FormatIndicator" of RRC IE).

[0151] <Definition of Delay Domain Precoder>

[0152] The First Definition

[0153] In the first definition, the subband-based precoder may be replaced by the delay domain precoder. Specifically, in a certain frequency range (FrequencyRange(FR)), the subband-based precoder may not be supported but the delay domain precoder may be supported.

[0154] The FR that does not support the subband-based precoder but supports the delay domain precoder may be, for example, at least one of 7.125 GHz to 24.25 GHz (also referred to as FR3, etc.), 24.25 GHz to 52.6 GHz (also referred to as FR2, etc.), and 52.6 GHz to 114.25 GHz (also referred to as FR4, etc.). In addition, FR may also be interpreted as frequency band, band, etc.

[0155] The UE may also receive configuration information related to the delay domain precoder (delay domain precoder configuration information). The delay domain precoder configuration information may also be supported instead of the configuration information related to the subband-based precoder (subband-based precoder configuration information, for example, subband-related parameters in the "reportFreqConfiguration" of the RRC IE).

[0156] Second Definition

[0157] In the second definition, a delay domain precoder may be introduced based on the subband-based precoder. Specifically, in a certain FR, a subband-based precoder and a delay domain precoder may also be supported.

[0158] The FR supporting both the subband-based precoder and the delay domain precoder may be, for example, at least one of 410 MHz to 7.125 GHz (also referred to as FR1, etc.) and 24.25 GHz to 52.6 GHz (also referred to as FR2, etc.).

[0159] The UE may also receive information indicating which of the subband-based precoder and the delay domain precoder is applied (application information, for example, "pmi-FormatIndicator" of RRC IE). The UE may also receive at least one of the delay domain precoder setting information and the subband-based precoder setting information.

[0160] <CSI parameters for delay domain precoder>

[0161] In Rel.15NR, each CSI parameter can also be calculated based on a given rule. The rule can also be based on the dependency (dependency) between CSI parameters. For example, the above-mentioned LI can also be calculated based on the reported CQI, PMI, RI and CRI. In addition, the above-mentioned CQI can also be calculated based on the reported PMI, RI and CRI. In addition, PMI can also be calculated based on the reported RI and CRI. RI can also be calculated based on the reported CRI.

[0162] In the first aspect, the CSI may include a parameter for a delay precoder. The parameter for a delay precoder may include, for example, at least one of the following.

[0163] ■ A coefficient g (e.g., g∈C Q×1 ) related information (coefficient information)

[0164] ■ Information about the delays for the coefficient(s) τ (e.g., τ∈R Q×1 ), or information related to the quantized delay τ (e.g., τ∈N Q×1 ), and in addition, hereinafter, the information related to the delay τ used for the coefficient g and the information related to the quantized delay τ are collectively referred to as delay information.

[0165] Here, the total number of delays Q may also be notified to the UE through at least one of higher layer signaling (eg, RRC signaling) and physical layer signaling. For example, the delay domain precoder configuration information may also include information indicating the total number of delays Q.

[0166] Delay Information

[0167] The delay information may be, for example, information indicating each delay τ (also referred to as a delay indicator (DI) or the like). q The value of can be non-quantized or quantized.

[0168] In the unquantized case, for example, it can also be τ q ∈R and τ q ≥ 0. Here, R may also be a set of Q unquantized delays τ.

[0169] On the other hand, in the case of quantization, for example, τ q = m·T DP Here, m∈N. N can also be a set of Q quantized delays τ. DP It can also be a quantitative unit. For example, T DP It can also be the reciprocal of bandwidth, that is, 1 / bandwidth. In addition, bandwidth can also be the number of resource blocks that constitute the bandwidth. Compared with subband, the bandwidth in the broadband system is large, so it can be used by using T DP , to increase the granularity.

[0170] The DI fed back as CSI can represent the delay τ q The adjacent delay τ q+1 (or τ q-1 ), which can also be expressed as the delay τ q The gap between the initial delay τ1, or the delay τ q In addition, offset can also be interpreted as gap, offset, difference, etc.

[0171] For example, in DI, the delay τ q The adjacent delay τ q+1 (or τ q-1 ), the offset Δτ can also be expressed by the following formula 7.

[0172] (Formula 7)

[0173] Δτ=[Δτ1,…,Δτ Q-1 ], where Δτ q =τ q+1 -τ q (For example, 1≤q≤Q-1)

[0174] In addition, DI represents the delay τ q In the case of a shift from the initial delay τ1, the shift Δτ can also be expressed by the following equation 8.

[0175] (Formula 8)

[0176] Δτ=[Δτ1,…,Δτ Q-1 ], where Δτ q =τ q+1 -τ1 (for example, when 1≤q≤Q)

[0177] In addition, DI represents the delay τ q In the case of the quantity itself, the delay τ can also be expressed by the following formula 9.

[0178] (Formula 9)

[0179] τ=[τ1,…,τ Q ], (for example, the case where 1≤q≤Q)

[0180] In addition, the above equations 7 to 9 are only examples and are not limited to the above equations. For example, in equations 7 to 9, the range of the subscript q of the delay τ can also be 0≤q≤Q-2 (or Q-1). In addition, in equation 7, Δτ can also be q =τ q -τ q-1 , in this case, it can also be τ q-1 = 0. In addition, in Formula 8, Δτ can also be q =τ q -τ0 (for example, the case where 0≤q≤Q-1).

[0181] 《Coefficient Information》

[0182] The coefficient information may be, for example, information indicating a matrix for delay precoding (delay precoding matrix indicator (DMI)), or an existing precoding matrix indicator (precoding matrix indicator (PMI)) may be reused.

[0183] For example, DMI may also indicate the delay domain precoder in an explicit or implicit manner. DMI is defined differently from the existing PMI. Therefore, the UE can report the CSI including the DMI to the base station without applying a modification to the existing PMI.

[0184] On the other hand, the delay domain precoder may also be indicated by the PMI in Rel.15NR in an explicit or implicit manner. In this case, the existing signaling for the PMI can be reused.

[0185] The above-mentioned DMI or PMI (DMI / PMI) may be information indicating the coefficient g in an explicit manner, or may be information indicating the coefficient g in a codebook-based manner.

[0186] The above-mentioned DMI / PMI, (1) can represent the amplitude (amplitude) and phase (phase) of the quantized coefficient g, (2) can also represent the quantized coefficient g based on the modulation order (or modulation method), or (3) can also represent the unquantized coefficient g.

[0187] Alternatively, (4) more than one codebook (for example, a plurality of codebooks of different sizes) may be specified. In this case, the DMI / PMI may also represent a coefficient g selected from the corresponding codebook.

[0188] For example, it is assumed that the coefficient g is expressed by the following equation 10.

[0189] [Formula 4]

[0190] (Formula 10)

[0191]

[0192] (1) The amplitude and phase of the quantized coefficient g

[0193] The amplitude of the coefficient g can also be quantized based on a given number (for example, the number of bits) n. The quantization set can also be specified by {1 / 2^n, 2 / 2^n, …, 1} "0: 1 / (2^n-1): 1". "0: 1 / (2^n-1): 1" can also represent a set of multiple fractions including 0 and 1, and the numerator of 1 / (2^n-1) is increased by 1 between 0 and 1. For example, when n=2, the quantization set can also be {1 / 4, 1 / 2, 3 / 4, 1}. In addition, when n=3, the quantization set can also be {1 / 8, 2 / 8, 3 / 8, 4 / 8, 5 / 8, 6 / 8, 7 / 8, 1}.

[0194] The UE may also select a value (closest value) closest to the amplitude of the coefficient g from the quantized set. For example, in the case of n=3, the amplitudes before and after quantization may also be expressed as follows.

[0195] [Formula 5]

[0196] Before quantification: After quantization:

[0197] In addition, the phase of the coefficient g can also be quantized based on a given number (e.g., number of bits) m. The quantized set can also be specified by {-π, -π+1 / 2^m*2*π, ..., -π+(2^m-1) / 2^m*2*π}. For example, in the case of m=2, the quantized set can also be {-π, -π / 2, 0, π / 2}.

[0198] The UE may also select a value (closest value) closest to the phase of the coefficient g from the quantized set. For example, in the case of m=2, the phases before and after quantization may also be expressed as follows.

[0199] [Mathematical formula 6]

[0200] Before quantification After quantification

[0201] Note that π may be any specific value, and for example, may be quantized to -π instead of -1 / 2π.

[0202] (2) The coefficient g quantized based on the modulation order

[0203] The modulation order-based quantization set may also be a constellation having 2n-th power values ​​normalized by the maximum amplitude on the constellation. Here, n may also be a given number (eg, each modulation order).

[0204] For example, when n=2, it is Quadrature Phase Shift Keying (QPSK) and the quantization set may be {0.7071+0.7071i, 0.7071-0.7071i, -0.7071+0.7071i, -0.7071-0.7071i}.

[0205] In addition, when n=3, it is 16-bit quadrature amplitude modulation (Quadrature Amplitude Modulation (QAM)) (for example, by Normalized QAM), the quantized set can also be {0.2357+0.2357i, 0.2357+0.7071i, 0.7071+0.2357i, 0.7071+0.7071i, 0.2357-0.2357i, 0.2357-0.7071i, 0.7071-0.2357i, 0.7071-0. 7071i, -0.2357+0.2357i, -0.2357+0.7071i, -0.7071+0.2357i, -0.7071+0.707 1i, -0.2357-0.2357i, -0.2357-0.7071i, -0.7071-0.2357i, -0.7071-0.7071i}.

[0206] The UE may also select a value closest to the coefficient g from the quantized set. For example, in the case of n=4, the coefficient g before and after quantization may also be expressed as follows.

[0207] [Formula 7]

[0208] Before quantification

[0209] After quantification

[0210] Alternatively, codebooks of different sizes may be specified. In this case, the DMI / PMI may also represent a coefficient g selected from the corresponding codebook.

[0211] In addition, the above-mentioned QAM may include not only 16QAM but also 64QAM, 256QAM, etc.

[0212] (3) Codebook

[0213] More than one codebook (e.g., multiple codebooks of different sizes) may also be specified. As the codebook, a Discrete Fourier Transform (DFT) matrix of a certain size (e.g., a size of 2 to the power of n * 2 to the power of n) may also be used. Here, n may also be a given number (e.g., the number of feedback bits).

[0214] For example, when n=1, one or more matrices of 2×1 may be defined in the codebook (also referred to as a DFT codebook, etc.). For example, the codebook may be expressed as follows.

[0215] [Mathematical formula 8]

[0216]

[0217] The UE may select a vector closest to the coefficient g in the codebook. For example, when n=1, the vector selected from the codebook for the coefficient g (see equation 10) may be expressed as follows. The coefficient g before and after quantization may be expressed as follows.

[0218] [Mathematical formula 9]

[0219]

[0220] <Precoder Generation in Frequency Domain>

[0221] As described above, in Rel.15NR, when the subband PMI report is set to the UE, the UE feeds back the wideband PMI and the subband PMI of each subband to the base station. The base station can also determine the matrix W1 based on the wideband PMI and determine the matrix W2 of each subband based on the subband PMI of each subband.

[0222] The UE may also determine a precoder matrix W for precoding of downlink transmission (eg, PDSCH) based on the matrices W1 and W2. For example, the precoder matrix W may also be calculated by the following equation 11.

[0223] (Formula 11)

[0224] W=W1W2

[0225] On the other hand, when the UE feeds back various broadband information (for example, at least one of coefficient information and delay information), how to define the precoder d becomes a problem.

[0226] In the first embodiment, the precoder d in the frequency domain (which may also be obtained from the codebook g) may also be determined based on the coefficient g determined based on the coefficient information (e.g., DMI / PMI) and the delay τ determined based on the delay information (e.g., DI). For example, the precoder d may also be determined using the following formula 12.

[0227] [Formula 10]

[0228] (Formula 12)

[0229]

[0230] Here, Q is the total number of delays, q is the subscript of the delay, N is the total number of subcarriers, and n is the subscript (index) of the subcarrier.

[0231] Figure 3 FIG. 1 is a diagram showing an example of a precoder based on broadband information according to the first embodiment. Figure 3For example, a one-dimensional sparse transform domain precoder (1dimension (1D)-sparse transform domain precoder) (space-delay domain precoder) may also be used.

[0232] In addition, Figure 3 In Figure 2B As described in , it is assumed that m (m>1, here m=2) broadband information is reported from the UE. Each broadband information may also include at least one of the delay information (for example, the above DI) and the coefficient information (for example, the above DMI / PMI).

[0233] For example, in Figure 3 In the example, the total number of delays Q=2, and broadband information #1 and #2 are reported from the UE to the base station. Broadband information #1 may also include DI indicating delay τ1 and DMI / PMI indicating coefficient g1 for delay τ1. In addition, broadband information #2 may also include DI indicating delay τ2 and DMI / PMI indicating coefficient g2 for delay τ2. In addition, the length (size) of g1 and g2 may also be related to the number of antennas.

[0234] like Figure 3 As shown, the precoder W of subcarrier #i (1≤i≤n) in the case of Q=2 (i) It may be determined based on at least one of DI and DMI / PMI included in each of the m broadband information.

[0235] For example, in Figure 3 In the precoder W (i) It may be determined based on the delay τ1 indicated by DI and the coefficient g1 indicated by DMI / PMI in the broadband information #1, and the delay τ2 indicated by DI and the coefficient g2 indicated by DMI / PMI in the broadband information #2.

[0236] In addition, Figure 3 In the example, the subcarrier index #i is 1≤i≤n, but is not limited thereto and may also be 0≤i≤n-1.

[0237] Figure 4 FIG. 4 is a diagram showing another example of a precoder based on broadband information according to the first embodiment. Figure 4 In, for example, a two-dimensional (2D)-sparse transform domain precoder (TDP), an angle-delay domain precoder may also be used. Figure 4In the embodiment, the angle domain and the delay domain may be combined (joint).

[0238] exist Figure 4 In the example, it is assumed that, in addition to m (m>1, here m=2) broadband information, information related to space (spatial information) is reported from the UE. Each broadband information may also include delay information (e.g., the above-mentioned DI) and at least one of the coefficient information (e.g., the above-mentioned DMI / PMI).

[0239] The spatial information may also include information related to at least one of a tilde (a "~" is added above w) of a codeword w selected from the codebook W** and an angle θ. In addition, the size of the codebook W** may also be related to channel correlation.

[0240] like Figure 4 As shown, the precoder W of subcarrier #i (1≤i≤n) in the case of Q=2 (i) It may be determined based on the DI and DMI / PMI included in each of the m broadband information, and at least one of the angle θ determined by the spatial information and the codeword w wave sign.

[0241] For example, in Figure 4 In the precoder W (i) Based on the delay τ1 represented by DI in broadband information #1 and the coefficient g represented by DMI / PMI (1) , the delay τ2 represented by DI in broadband information #2 and the coefficient g represented by DMI / PMI (2) , and the angle θ determined by the spatial information and the codeword w wave sign are determined. Figure 4 In the example, the subcarrier index i is 1≤i≤n, but is not limited thereto and may also be 0≤i≤n-1.

[0242] Here, in Figure 4 The precoder W of subcarrier #i (1≤i≤n) (i) A(θ) used in determining can also be defined by the following Equations 13 and 14.

[0243] [Mathematical formula 11]

[0244] (Formula 13)

[0245] A(θ)=[a(θ1),...,a(θ L )]

[0246] (Formula 14)

[0247]

[0248] Here, M is the number of antennas or radio frequency (RF) chains. L (= Q) is the vector g m and θ m Length. g ml and θ ml They are vector g m and θ m The lth (1≤l≤L) element of . d is the antenna space. In addition, λ C is the wavelength.

[0249] Figure 5 FIG. 1 is a diagram showing still another example of a precoder based on broadband information according to the first embodiment. Figure 5 In, with Figure 4 The difference may also be that the precoders in the angle domain and the delay domain are different. Figure 5 In, with Figure 4 The difference can also be that the codeword and the angle θ are delayed by τ q The time is not common, but for each delay τ q (ie, for each broadband information) and the codeword and angle θ are reported. Figure 4 The explanation will focus on the differences.

[0250] exist Figure 5 In the example, m (m>1, m=2 here) broadband information is reported from the UE. Each broadband information may include, in addition to the delay information (e.g., the DI) and the coefficient information (e.g., the DMI / PMI), at least one of information related to the codeword for delay τ (codeword information) and information related to the angle θ (angle information).

[0251] like Figure 5 As shown, the precoder W of subcarrier #i (1≤i≤n) in the case of L=2 (i) It may be determined based on at least one of DI and DMI / PMI included in each of the m wideband information, the angle θ determined based on the angle information, and the codeword determined based on the codeword information.

[0252] For example, in Figure 5 In the precoder W (i) It is determined based on the delay τ1 represented by DI, the coefficient g1 represented by DMI / PMI, the angle θ1 and the codeword w in broadband information #1, and the delay τ2 represented by DI, the coefficient g2 represented by DMI / PMI, the angle θ2 and the codeword in broadband information #2.

[0253] in addition, Figure 5 A(θ1) and A(θ2) of can also be defined in the same manner as the above-mentioned equations 12 and 13, respectively. Figure 5 In the example, the subcarrier index i is 1≤i≤n, but is not limited to this, and may also be 0≤i≤n-1.

[0254] As described above, the UE feeds back each broadband information including at least one of the delay information and the coefficient information. The base station determines the precoder for each subcarrier based on each broadband information. Thus, even if the broadband to which the CSI is reported is broadband-domainized, the UL overhead can be reduced and the reliability of the CSI can be prevented from decreasing.

[0255] (CSI structure)

[0256] Figure 6 is a diagram showing an example of the structure of a CSI report in UCI. Here, the number of CSI reports may also be n. The number of CSI parts in a CSI report may also be m. The number of wideband PMI feedbacks (e.g., PMI wideband information fields) in CSI part 1 (in a CSI report that does not have more than one CSI part, or in CSI part 1 of more than one CSI part) may also be Q0. The number of wideband PMI feedbacks outside CSI part 1 may also be Q. The number of wideband PMI feedbacks in CSI part m may also be Q. (m) The number of wideband reports in a CSI part may also be q. The number of wideband PMI feedbacks in wideband report q may also be Q. (q) The Q wideband PMI feedbacks may also be divided into q wideband reports. The number of wideband PMI feedbacks included in wideband reports #1, #2, ..., #q may also be Q, respectively. (1) , Q (2) , …, Q (q) .

[0257] In the present disclosure, CSI report #n in CSI part m and CSI part m of CSI report #n may also be replaced with each other.

[0258] In the present disclosure, broadband PMI, broadband PMI information, PMI broadband information, PMI broadband information field, broadband PMI feedback may also be replaced with each other. In the present disclosure, DI, broadband DI, broadband DI information, DI broadband information, DI broadband information field, broadband DI feedback may also be replaced with each other.

[0259] The feedback for the aforementioned 2D sparse TDP can be a group of (τ, g tilde), a group of (θ, w tilde), or a combination thereof. Here, the delay domain is the transform domain (the transformed domain) of the frequency domain, and the angle domain is the transform domain (the transformed domain) of the spatial domain.

[0260] τ represents delay, g represents the coefficient of the corresponding delay, θ represents angle, w represents the coefficient of the corresponding angle.

[0261] In each of the following embodiments, an example of using feedback in the delay domain is described. That is, the effects of (θ, w tilde) and g tilde are merged into g, so that the UE feeds back (τ, g). g represents the coefficients of all antennas or angles in the corresponding delay.

[0262] For example, two delays and two angles may be used in 2D sparse TDP, and (τ1, g wavy 1), (τ2, g wavy 2), (θ1, w wavy 1), (θ2, w wavy 2) may be calculated first. The UE may also calculate g1 and g2 based on these values ​​using the following formula 15.

[0263] [Mathematical formula 12]

[0264] (Formula 15)

[0265]

[0266]

[0267] Thus, the UE feeds back (τ1, g1) and (τ2, g2). g1 and g2 may also correspond to the PMI broadband information field (broadband PMI information) respectively. τ1 and τ2 may also correspond to the delay index (DI) or delay indicator broadband information field (broadband DI information) respectively.

[0268] The UE may also report (τ, g tilde) and (θ, w tilde). In this case, in the rules of the following embodiments, (τ(DI), g(PMI)) may be replaced by (τ, g tilde) or by (θ, w tilde).

[0269] In the CSI reports shown in the following figures, some fields may be omitted, and some other fields may be added to the CSI report. In the CSI reports shown in the following figures, the types and order of the fields are not limited to the examples in the figures.

[0270] <Implementation 1> One CSI Part

[0271] In this embodiment, the case where one CSI report includes one CSI part is described. For one or more wideband PMI feedbacks, it is also possible that CSI bit generation within UCI without more than one CSI part is defined.

[0272] 《Implementation 1-1》CSI field

[0273] Multiple CSI fields within a CSI report may also include Q0 wideband PMI feedbacks (e.g., PMI wideband information field). The CSI fields of a CSI report, if reported, may also further include a delay index (DI, e.g., DI wideband information field) corresponding to each of the Q0 wideband PMI feedbacks.

[0274] [Implementation Method 1-1-1]

[0275] Q0=1 may also be used. That is, multiple CSI fields in a CSI report may also include a wideband PMI feedback. The CSI fields of a CSI report may further include DI when reported.

[0276] For example, Figure 7 As shown, CSI report #n may also include wideband PMI feedback or codebook index, if reported; and the corresponding DI, if reported.

[0277] [Implementation Method 1-1-2]

[0278] It may also be Q0≥1. That is, multiple CSI fields in one CSI report may also include multiple wideband PMI feedbacks. The CSI field of one CSI report may further include DI when reported.

[0279] [[Implementation Method 1-1-2-1]]

[0280] The value of Q0 may also be set or indicated by a higher layer parameter (eg, at least one of RRC and MAC CE) or a physical layer parameter (eg, DCI).

[0281] [[Implementation Method 1-1-2-2]]

[0282] The value of Q0 may also be determined by the UE and reported to the base station in the UCI or otherwise.

[0283] [[Implementation Method 1-1-2-3]]

[0284] The maximum value of Q0 may also be set or indicated by a higher layer parameter (e.g., at least one of RRC and MAC CE) or a physical layer parameter (e.g., DCI). The value of Q0 may also be determined by the UE and reported to the base station in the UCI or otherwise. The value of Q0 may also be less than the set maximum value.

[0285] For example, Figure 8 As shown, CSI report #n may also include multiple wideband PMI feedbacks or codebook indices when reported, and Q0 groups of corresponding DIs when reported. In implementation 1-1-2-1, CSI report #n may not include the value of Q0. In implementation 1-1-2-2 and implementation 1-1-2-3, CSI report #n may also include the value of Q0.

[0286] DI can also be reported together with PMI except for the following two cases.

[0287] Case 1: It is assumed that the DI for the initial PMI is always 0 and does not need to be reported.

[0288] Case 2: When the CSI report configuration does not include DI, DI will not be reported by the UE.

[0289] 《Implementation 1-2》UCI bit sequence generation

[0290] In the absence of a CSI report with more than one part, the CSI fields of the entire CSI report may also be mapped to the UCI bit sequence a0, a1, ..., a starting from a0. A-1 In other cases, the UCI bit sequence may be generated according to Embodiment 2 or Embodiment 3 described later.

[0291] For example, Fig. 9 As shown, in a CSI report without a CSI report having more than one part, the CSI fields of all CSI reports #1, #2, ... #n in ascending order of CSI report priority (priority value, priority order) can also be mapped to UCI bit sequences a0, a1, ..., a A-1 Here, the CSI field of CSI report #n can also be the aforementioned Figure 7 or Figure 8 The example shown. A=n may also be true.

[0292] Rel.15NR or at least one of the existing, code block segmentation, channel coding, and rate matching can also be applied to the UCI bit sequence generated in implementation mode 1-2.

[0293] According to this embodiment, in the case where one CSI report has one CSI part, the wideband PMI can be properly reported.

[0294] <Implementation 2> Two CSI Parts

[0295] In this embodiment, a case where one CSI report includes two CSI parts is described.

[0296] For multiple wideband PMI feedback, it is also possible that CSI bit generation in UCI with two-part CSI reporting is defined.

[0297] For Rel.15NR, compatibility can be maintained.

[0298] 《Implementation 2-1》CSI field of CSI part 1

[0299] The multiple CSI fields of a CSI report in CSI part 1 may also include: an indicator of the number Q of multiple wideband PMI feedbacks in CSI part 2 when reported, and at least one of Q0 wideband PMI feedbacks when reported (e.g., PMI wideband information field). The CSI fields of a CSI report in CSI part 1 may also further include: a DI corresponding to each of the Q0 wideband PMI feedbacks when reported (e.g., DI wideband information field).

[0300] [Implementation method 2-1-1]

[0301] For multiple CSI fields of one CSI report in CSI part 1, an indicator of the number of multiple wideband PMI feedbacks in CSI part 2 may also be appended only if reported.

[0302] For one wideband PMI feedback, it is also possible to use the CSI bits in the UCI defined in Embodiment 1 for generation. In Embodiment 2, it is also possible to consider only a plurality of wideband PMI feedbacks.

[0303] [Implementation method 2-1-2]

[0304] The multiple CSI fields of a CSI report in CSI part 1 may also include: a wideband PMI feedback if reported, and at least one of an indicator of the number of wideband PMI feedbacks if reported in CSI part 2. The multiple CSI fields of a CSI report in CSI part 1 may also further include: a DI if reported.

[0305] CSI Part 1 includes a wideband PMI feedback, so even if CSI Part 2 is dropped, performance degradation can be suppressed.

[0306] [Implementation method 2-1-2]

[0307] The multiple CSI fields of a CSI report in CSI part 1 may also include: at least one of: Q0 wideband PMI feedbacks if reported, and an indicator of the number of wideband PMI feedbacks if reported in CSI part 2. The multiple CSI fields of a CSI report in CSI part 1 may also further include DI if reported.

[0308] Implementation 1-1-2 can also be applied to the setting or definition of Q0.

[0309] The flexibility of broadband PMI feedback can be improved.

[0310] For example, Fig.10 As shown, CSI part 1 of CSI report #n may also include: Q0 groups of wideband PMI feedback or codebook index reported and DI reported, and an indicator of the number Q of multiple wideband PMI feedbacks in CSI part 2 reported.

[0311] 《Implementation 2-2》CSI field of CSI part 2

[0312] The multiple CSI fields of a CSI report in CSI part 2 may also contain one or more wideband reports.

[0313] [Implementation method 2-2-1]

[0314] The CSI part 2 of a CSI report may also include: a wideband report, if reported, wherein the wideband report includes Q wideband PMI feedbacks (e.g., PMI wideband information field). The wideband report may also further include a DI corresponding to each of the Q wideband PMI feedbacks (e.g., DI wideband information field) if reported.

[0315] [[Implementation Method 2-2-1-1]]

[0316] The value of Q may be set or indicated by at least one of RRC, MAC CE and DCI, or may be determined by the UE as in implementation 2-1, and indicated (reported) by an indicator of the number of wideband PMI feedbacks Q in CSI part 1.

[0317] For example, Fig.11 As shown, CSI part 2 of CSI report #n may also include: Q groups of wideband PMI feedback when reported and DI when reported, and an indicator of the number of multiple wideband PMI feedbacks in CSI part 2 when reported.

[0318] [[Implementation Method 2-2-1-2]]

[0319] In the case where at least one CSI report is divided into two parts, it can also be that two UCI bit sequences a (1) 0,a (1) 1, ...a (1) A(1)-1 (Length A (1) ) and a (2) 0,a (2) 1, ...a (2) A(2)-1 (Length A (2) ) is generated.

[0320] For CSI part 1, multiple CSI fields of all CSI reports #1, #2, ... #n can also be sorted by Fig. 12A The order from top to bottom is mapped to a (1) 0,a (1) 1, ...a (1) A(1)-1 Here, the CSI field of CSI report #n can also be the aforementioned Figure 7 or Figure 8 or Fig.10 The example shown. It can also be A (1) = n. For CSI part 2, multiple CSI fields of all CSI reports #1, #2, ... #n can also be Fig. 12B The order from top to bottom is mapped to a (2) 0.a (2) 1. …a (2) A(2)-1 Here, the CSI field of CSI report #n can also be the aforementioned Fig.11 The example shown. It can also be A (2) =n.

[0321] Alternatively, if CSI report #n is not two parts, the multiple CSI fields in CSI part 1 are CSI report #n; if CSI report #n is two parts, the multiple CSI fields in CSI part 1 are CSI part 1 of CSI report #n. The multiple CSI fields in CSI part 2 can also be CSI part 1 of CSI report #n.

[0322] [[Implementation Method 2-2-1-3]]

[0323] The UCI bit sequence of CSI part 1 and the UCI bit sequence of CSI part 2 may also be encoded independently. In the case where the actual coding rate is higher than the maximum coding rate, CSI part 2 may be discarded first, and then CSI part 1 may be discarded until the coding rate meets the necessary conditions for the maximum coding rate.

[0324] Rel.15NR or at least one of the existing, code block segmentation, channel coding, and rate matching can also be applied to the two UCI bit sequences generated in implementation 2-2-1-2.

[0325] like Fig.13 As shown, CSI part 1 and CSI part 2 may also be independently encoded. CSI part 2 includes multiple wideband reports of CSI reports. A wideband report of a CSI report includes Q wideband PMIs.

[0326] In the case that the actual coding rate exceeds the expected value, the UE may also first discard CSI part 2 and then discard CSI part 1.

[0327] If the output sequence length E after rate matching is used tot , and the maximum coded bit length E for a coding rate that does not exceed the maximum PUCCH coding rate max , then the output sequence length of HARQ-ACK, SR and CSI part 1 combined when using two parts of CSI can also be min(E tot , E max ). The output sequence length based on CSI part 2 can also be E tot -min(E tot , E max ).

[0328] According to this embodiment 2-2-1, complexity can be suppressed.

[0329] [Implementation method 2-2-2]

[0330] The CSI part 2 of a CSI report may also include two wideband reports. The two wideband reports may also include Q (1) wideband PMI feedback (e.g., PMI wideband information field) and Q (2) A CSI part 2 of a CSI report may also further include: a DI when reported (eg, a DI wideband information field).

[0331] [[Implementation Method 2-2-2-1]]

[0332] Q (1) and Q (2) The value may be set or indicated by at least one of RRC, MAC CE and DCI, or may be determined by the UE and indicated (reported) by an indicator of the number of wideband PMI feedbacks in CSI part 1, or may be obtained by a combination of them.

[0333] [[[Option 1]]]

[0334] Q (1) and Q (2) It can also be set or indicated directly.

[0335] [[[Option 2]]]

[0336] Q and Q (1) It can also be set or indicated. (2) Can also be used as QQ (1) And be obtained.

[0337] [[[Option 3]]]

[0338] Q can also be set or indicated. (1) It can also be obtained as floor(Q / 2). Q (2) Can also be used as QQ (1) And be obtained.

[0339] [[[Option 4]]]

[0340] Q and ΔQ can also be set or indicated. (1) and Q (2) It can also be obtained by a function of Q and ΔQ. For example, Q (1) =floor((Q-ΔQ) / 2), Q (2) =QQ (1) And can also be obtained through Q (1) =floor(Q / 2)-ΔQ, Q (2) =QQ (1) And be obtained.

[0341] For example, in the case where option 2 is applied, Fig.14 As shown, CSI part 1 of CSI report #n may also include: the number of multiple wideband PMI feedbacks Q, Q in CSI part 2 when being reported (1) Indicator. Fig.15 As shown, CSI part 2 of CSI report #n may also include wideband reports #1 and #2. Wideband report #1 may also include: wideband PMI feedback or codebook index when reported and Q of DI when reported (1) Wideband report #2 may also include: wideband PMI feedback or codebook index when reported and Q of DI when reported (2) (QQ (1) groups.

[0342] [[Implementation Method 2-2-2-2]]

[0343] In the case where at least one CSI report is divided into two parts, it can also be that two UCI bit sequences a (1) 0.a (1) 1. …a (1) A(1)-1 (Length A (1) ) and a (2) 0.a (2) 1. …a (2) A(2)-1 (Length A (2) ) is generated.

[0344] For CSI part 1, multiple CSI fields of all CSI reports #1, #2, ... #n can also be sorted by Fig.16 The order from top to bottom is mapped to a (1) 0,a (1) 1, ...a (1) A(1)-1 Here, the CSI field of CSI report #n can also be the aforementioned Figure 7 or Figure 8 or Fig.14 The example shown. It can also be A (1) = n. For CSI part 2, multiple CSI fields of all CSI reports #1, #2, ... #n can also be Fig.17 The order from top to bottom is mapped to a (2) 0.a (2) 1. …a (2) A(2)-1 Here, the CSI field of CSI report #n can also be the aforementioned Fig.15 The example shown. It can also be A (2) =n.

[0345] Alternatively, if CSI report #n is not two parts, the multiple CSI fields in CSI part 1 are CSI report #n; if CSI report #n is two parts, the multiple CSI fields in CSI part 1 are CSI part 1 of CSI report #n. The multiple CSI fields in CSI part 2 can also be CSI part 1 of CSI report #n.

[0346] [[Implementation Method 2-2-2-3]]

[0347] The UCI bit sequence of CSI part 1 and the UCI bit sequence of CSI part 2 may also be encoded independently. In the case where the actual coding rate is higher than the maximum coding rate, CSI part 2 may be discarded first, and then CSI part 1 may be discarded until the coding rate meets the necessary conditions for the maximum coding rate.

[0348] Rel.15NR or at least one of the existing, code block segmentation, channel coding, and rate matching can also be applied to the two UCI bit sequences generated in implementation 2-2-2-2.

[0349] Fig.18 Indicates the case where CSI part 2 of the two-part CSI includes two wideband reports #1 and #2. In CSI part 2, wideband report #1 of all CSI reports and wideband report #2 of all CSI reports are mapped in sequence. Wideband report #1 of all CSI reports includes wideband report #1 of one CSI report (Q (1) The broadband report #2 of the entire CSI report contains a broadband report #2 of the CSI report (QQ (1) broadband PMI).

[0350] If the output sequence length E after rate matching is used tot , and the maximum coded bit length E for a coding rate that does not exceed the maximum PUCCH coding rate max , then the combined output sequence length of HARQ-ACK, SR and CSI part 1 when using two parts of CSI can also be min(E tot , E max ). The output sequence length based on CSI part 2 can also be E tot -min(E tot , E max ).

[0351] According to this embodiment 2-2-2, it is possible to maintain compatibility with the CSI report of Rel.15NR having two reports in the CSI part 2 of one CSI report.

[0352] [Implementation method 2-2-3]

[0353] The CSI part 2 of a CSI report may also include q wideband reports. The q wideband reports may also include Q (1) , Q (2) , …, Q (q) A wideband PMI feedback (eg, PMI wideband information field). The CSI part 2 of a CSI report may also further include: DI if reported (eg, DI wideband information field).

[0354] The first Q can also be included in the wideband report #1 of the CSI part 2 of the CSI report #n. (1) The corresponding DI, if reported, may also be further included in the wideband report #1 of the CSI part 2 of the CSI report #n.

[0355] The wideband report #q (q>1) of the CSI part 2 of the CSI report #n may also include the CSI with index Σ l＝1 q-1 Q (l) +1,…,Σ l＝1 q Q (l) The qth Q (q) The corresponding DI, if reported, may also be further included in the wideband report #q of the CSI part 2 of the CSI report #n.

[0356] [[Implementation Method 2-2-3-1]]

[0357] Q (1) , Q (2) , …, Q (q) The value of may be set or indicated by at least one of RRC, MAC CE, and DCI, or may be determined by the UE and indicated (reported) by an indicator of the number of wideband PMI feedbacks in CSI part 1, or may be obtained by a combination thereof. (1) , Q (2) , …, Q (q) The number of is obtained in an implicit way and can also be indicated (reported) in an implicit way.

[0358] [[[Option 1]]]

[0359] Q (1) , Q(2) , …, Q (q) can also be directly set or indicated.

[0360] [[Option 2]]

[0361] Q can also be set or indicated, Q (1) , Q (2) , …, Q (q-1) . Q (q) can also be obtained as Q - Σ p＝1 q-1 Q (p) and thus obtained.

[0362] [[Option 3]]

[0363] Q can also be set or indicated. For Q where 1 ≤ p < q (p) can also be obtained as floor(Q / q). Q (q) can also be obtained as Q - Σ p＝1 q-1 Q (p) and thus obtained.

[0364] For example, in the case where Option 1 is applied, as Fig.19 shown, CSI part 1 of CSI report #n can also include: the number Q of broadband PMI feedbacks in the reported case (1) , Q (2) , …, Q (q) indicators. Here, the number q of broadband reports can also be implicitly indicated (reported) by the number of Q (1) , Q (2) , …, Q (q) . CSI part 2 of CSI report #n can also include broadband reports #1, #2, …, #q. As Fig. 20A shown, broadband report #1 can also include: the Q (1) groups of broadband PMI feedback or codebook index and DI in the reported case Fig. 20B shown, broadband report #q can also include: the Q (q) groups of broadband PMI feedback or codebook index and DI in the reported case

[0365] [[Embodiment 2 - 2 - 3 - 2]]

[0366] Q (q)It may also be indicated (reported) by an indicator of the number of wideband PMI feedbacks in wideband report #q-1 of CSI part 2. q may be determined by the UE and indicated (reported) in CSI part 1, or may be explicitly set or indicated by at least one of RRC, MACCE, and DCI.

[0367] For example, Fig.21 As shown, CSI part 1 of CSI report #n may contain: the number of wideband PMI feedbacks, Q, that are reported (1) The indicator may also include: an indicator of the number q of broadband reports, if any, being reported.

[0368] CSI part 2 of CSI report #n may also contain wideband reports #1, #2, ..., #q. Fig. 22 As shown, wideband report #1 may also include: wideband PMI feedback or codebook index in the case of being reported and Q of DI in the case of being reported (1) The number of groups may also include the number of wideband PMI feedbacks Q for the next wideband report #2 in the case of being reported. (2) Indicator. Fig.23A As shown, wideband report #q-1 may also include: wideband PMI feedback or codebook index in the case of being reported and Q of DI in the case of being reported (q-1) groups, and may also include the number Q of wideband PMI feedbacks for the next wideband report #q in the case of being reported (q) Indicator. Fig. 23B As shown, the wideband report #q may also include: the wideband PMI feedback or codebook index in the case of being reported and the Q of the DI in the case of being reported (q) groups.

[0369] [[Implementation Method 2-2-3-3]]

[0370] In the case where at least one CSI report is divided into two parts, it can also be that two UCI bit sequences a (1) 0.a (1) 1. …a (1) A(1)-1 (Length A (1) ) and a (2) 0.a (2) 1. …a (2) A(2)-1 (Length A (2) ) is generated.

[0371] For CSI part 1, multiple CSI fields of all CSI reports #1, #2, ... #n can also be sorted by Fig.24The order from top to bottom is mapped to a (1) 0,a (1) 1, ...a (1) A(1)-1 Here, the CSI field of CSI report #n can also be the aforementioned Figure 7 or Figure 8 or Fig.19 or Fig.21 The example shown. It can also be A (1) = n. For CSI part 2, multiple CSI fields of all CSI reports #1, #2, ... #n can also be Fig.25 The order from top to bottom is mapped to a (2) 0.a (2) 1. …a (2) A(2)-1 Here, the CSI field of CSI report #n can also be the aforementioned Figure 7 or Figure 8 or Fig. 20A or Fig. 20B or Fig. 22 or Fig.23A or Fig. 23B The example shown. It can also be A (2) =n.

[0372] Alternatively, if CSI report #n is not two parts, the multiple CSI fields in CSI part 1 are CSI report #n; if CSI report #n is two parts, the multiple CSI fields in CSI part 1 are CSI part 1 of CSI report #n. The multiple CSI fields in CSI part 2 can also be CSI part 1 of CSI report #n.

[0373] [[Implementation Method 2-2-3-4]]

[0374] The UCI bit sequence of CSI part 1 and the UCI bit sequence of CSI part 2 may also be encoded independently. In the case where the actual coding rate is higher than the maximum coding rate, CSI part 2 may be discarded first, and then CSI part 1 may be discarded until the coding rate meets the necessary conditions for the maximum coding rate.

[0375] Rel.15NR or at least one of the existing, code block segmentation, channel coding, and rate matching can also be applied to the two UCI bit sequences generated in implementation 2-2-3-2.

[0376] Fig.26Indicates the case where CSI part 2 of the two-part CSI includes q wideband reports #1, #2, ..., #q. In CSI part 2, wideband report #1 of all CSI reports, wideband report #2 of all CSI reports, ..., and wideband report #q of all CSI reports are mapped in sequence. Wideband report #1 of all CSI reports includes wideband report #1 (Q (1) The wideband report #q of all CSI reports contains a wideband report #q of CSI reports (Q (q) broadband PMI).

[0377] If the output sequence length E after rate matching is used tot , and the maximum coded bit length E for a coding rate that does not exceed the maximum PUCCH coding rate max , then the combined output sequence length of HARQ-ACK, SR and CSI part 1 when using two parts of CSI can also be min(E tot , E max ). The output sequence length based on CSI part 2 can also be E tot -min(E tot , E max ).

[0378] According to this embodiment 2-2-3, the flexibility of multiple wideband PMI feedback can be improved, and the flexibility of the mapping order of multiple CSI fields in one CSI report can be improved.

[0379] <Implementation 3> m CSI parts

[0380] In this embodiment, a case where one CSI report includes m CSI parts is described.

[0381] For multiple wideband PMI feedback, it is also possible that CSI bit generation in UCI for a CSI report with m parts is defined.

[0382] 《Implementation 3-1》CSI field of CSI part 1

[0383] The multiple CSI fields of a CSI report in CSI part 1 may also include: an indicator of the number m of CSI parts being reported, an indicator of the number of wideband PMI feedbacks in m-1 CSI parts (e.g., each CSI part other than CSI part 1) being reported, and at least one of Q0 wideband PMI feedbacks being reported (e.g., PMI wideband information field). The multiple CSI fields of a CSI report in CSI part 1 may also further include: a DI corresponding to each of the Q0 wideband PMI feedbacks being reported (e.g., DI wideband information field).

[0384] [Implementation method 3-1-1]

[0385] The multiple CSI fields of a CSI report in CSI part 1 may only include: an indicator of the number of multiple wideband PMI feedbacks in each CSI part (for example, each CSI part other than CSI part 1) when being reported, and may further include: an indicator of the number m of CSI parts when being reported.

[0386] [Implementation method 3-1-2]

[0387] The multiple CSI fields of a CSI report in CSI part 1 may also include: a wideband PMI feedback if reported, an indicator of the number of wideband PMI feedbacks in each CSI part (e.g., each CSI part other than CSI part 1) if reported, and an indicator of the number m of CSI parts if reported. The multiple CSI fields of a CSI report in CSI part 1 may also further include DI if reported.

[0388] The number m of CSI parts may be notified (reported) in an implicit manner or in an explicit manner.

[0389] For example, Fig. 27 As shown, CSI part 1 of CSI report #n may also include: PMI wideband information field information #0 when reported, DI wideband information field information #0 when reported, and the number of wideband PMI feedbacks Q in each of the remaining m-1 CSI parts (CSI part 2 to CSI part m) when reported. (1) , Q (2) , …, Q (m-1) indicator.

[0390] In this case, the number of CSI parts m can also be calculated by Q (1) , Q (2) , …, Q(m-1) In addition, the number m of CSI parts may be notified (reported) in an explicit manner by including an indicator of the number m of CSI parts in CSI part 1 of CSI report #n.

[0391] For a wideband PMI feedback, the CSI bit generation within the UCI in Implementation Mode 1 may also be applied.

[0392] [Implementation method 3-1-3]

[0393] The multiple CSI fields of a CSI report in CSI part 1 may also include: Q0 wideband PMI feedbacks when reported, an indicator of the number of wideband PMI feedbacks in each CSI part (e.g., each CSI part other than CSI part 1) when reported, and at least one of an indicator of the number of CSI parts m when reported. The multiple CSI fields of a CSI report in CSI part 1 may also further include: DI when reported.

[0394] The setting or determination of Q0 may be performed according to at least one of Embodiment 1-1-2 and Embodiments 1-1-2-1 to 1-1-2-3.

[0395] In Embodiment 3-1, the indicator of the number of multiple wideband PMI feedbacks of m-1 CSI parts may also depend on the design of CSI part m defined in Embodiment 3-2 described later.

[0396] 《Implementation 3-2》CSI field of CSI part m

[0397] Multiple CSI fields of a CSI report in CSI part m may also include: Q (m) The multiple CSI fields of a CSI report in CSI part m may also further include: DI if reported (eg, DI Wideband Information field).

[0398] CSI part m may also include one or more wideband reports in CSI part 2 described in embodiment 2-2. In other words, a structure in which CSI part 2 in embodiment 2-2 is replaced with CSI part m may be applied to CSI part m in embodiment 3-2.

[0399] For example, the CSI part m of CSI report #n may also include a CSI with index Σ l＝1m-1 Q (l) +1, …, Σ l＝1 m Q (l) The q-th Q of (m) For each CSI part other than CSI part 1, the number Q of wideband PMI feedbacks. The corresponding DI in the reported case may also be further included in CSI part m of CSI report #n.

[0400] [Embodiment 3-2-1]

[0401] The number Q of wideband PMI feedbacks in each CSI part other than CSI part 1 (2) , …, Q (m) The value of can be set or indicated by at least one of RRC, MAC CE, and DCI, can also be determined by the UE and indicated (reported) by an indicator of the number of wideband PMI feedbacks within CSI part 1, and can also be obtained by their combination. m can be obtained implicitly by the number of (2) , …, Q (m) and can also be indicated (reported) implicitly.

[0402] [[Option 1]]

[0403] Q (2) , …, Q (m) can also be directly set or indicated.

[0404] [[Option 2]]

[0405] Q, Q can also be set or indicated (2) , …, Q (m-1) . Q (m) can also be obtained as Q - Σ p＝2 m-1 Q (p) and obtained.

[0406] [[Option 3]]

[0407] Q can also be set or indicated. For Q where 1 ≤ p < m (p) can also be obtained as floor(Q / (m - 1)). Q (m) can also be obtained as Q - Σ p＝2 m-1 Q (p) and obtained.

[0408] For example, in the case where Embodiment 3-1-1 and Option 1 of Embodiment 3-2-1 are applied to m (m > 2) CSI parts, as Fig.28As shown, CSI part 1 of CSI report #n may also include: the number of wideband PMI feedbacks Q in each of the remaining m-1 CSI parts (CSI part 2 to CSI part m) to be reported (1) , Q (2) , …, Q (m-1) Here, the number of CSI parts m can also be represented by Q (1) , Q (2) ,…,Q (m-1) The number m-1 is indicated (reported) in an implicit way. Fig.29A As shown, CSI part 2 of CSI report #n may also include: wideband PMI feedback or codebook index if reported and Q of DI if reported (1) groups. When m>2, Fig.29B As shown, the CSI part m of CSI report #n may also include: wideband PMI feedback or codebook index when reported and Q of DI when reported (m-1) groups.

[0409] [Implementation method 3-2-2]

[0410] Q (m) The value of may also be determined by the UE and indicated (reported) by an indicator of the number of wideband PMI feedbacks in CSI part m-1. The number of CSI parts m may be set or indicated in an explicit manner by at least one of RRC, MAC CE, and DCI, or may be determined by the UE and indicated (reported) by an indicator of the number of wideband PMI feedbacks in CSI part 1.

[0411] For example, Fig.30 As shown, CSI part 1 of CSI report #n may also include: the number of wideband PMI feedbacks Q in the next CSI part (CSI part 2) reported (1) An indicator of and an indicator of the number m of CSI parts that are reported.

[0412] When m is greater than 3, such as Fig.31 As shown, CSI part 2 of CSI report #n may also include: wideband PMI feedback or codebook index if reported and Q of DI if reported (1) The number of groups, and the number of wideband PMI feedbacks in the next CSI part (CSI part 3) if reported (2) Indicator. Fig.32AAs shown, the CSI part m-1 (m>3) of CSI report #n may also include: the wideband PMI feedback or codebook index in the case of being reported and the Q of DI in the case of being reported (m-2) groups, and the number of wideband PMI feedbacks Q in the next CSI part (CSI part m) if reported (m-1) Indicator. Fig.32B As shown, the CSI part m (m>2) of CSI report #n may also include: the wideband PMI feedback or codebook index in the case of being reported and the Q of DI in the case of being reported (m -1) groups.

[0413] In the case of using three parts of CSI, Fig.31 Similarly, CSI part 2 of CSI report #n may also include: wideband PMI feedback if reported or codebook index and Q of DI if reported (1) The number of groups, and the number of wideband PMI feedbacks in the next CSI part (CSI part 3) if reported (2) Indicator. Fig.33 As shown, the CSI part 3 of CSI report #n for l=2, 3, ..., m-1 may also include: the wideband PMI feedback or codebook index when reported and the Q of DI when reported (l) Here m may not be the number of CSI parts, but an arbitrary integer greater than 1. CSI part 3 of CSI report #n is in Q (l-1) Groups and Q (l) Between groups, it can also include: the number of next wideband PMI feedbacks Q in the case of being reported (l) indicator.

[0414] 《Implementation 3-3》UCI bit sequence generation

[0415] In the case where at least one CSI report is composed of m parts, it can also be m UCI bit sequences a (1) 0,a (1) 1, ...a (1) A(1)-1 (Length A (1) ), a (2) 0,a (2) 1, ...a (2) A(2)-1 (Length A (2) ),…,a (m) 0,a (m) 1, ...a (m) A(m)-1 (Length A(m) ) is generated.

[0416] For CSI part 1, multiple CSI fields of all CSI reports #1, #2, ... #n can also be sorted by Fig.34A The order from top to bottom is mapped to a (1) 0,a (1) 1, ...a (1) A(1)-1 Here, the CSI field of CSI report #n can also be the aforementioned Figure 7 or Figure 8 or Fig.28 or Fig.30 The example shown. It can also be A (1) = n. For CSI part m, multiple CSI fields of all CSI reports #1, #2, ... #n can also be Fig.34B The order from top to bottom is mapped to a (m) 0,a (m) 1, ...a (m) A(m)-1 Here, the CSI field of CSI report #n can also be the aforementioned Fig.23A or Fig. 23B or Fig.31 or Fig.32A or Fig.32B The example shown. It can also be A (m) =n.

[0417] Alternatively, if CSI report #n is not two parts, the multiple CSI fields in CSI part 1 are CSI report #n (for example, implementation 1-1-1 or 1-1-2); if CSI report #n is two parts, the multiple CSI fields in CSI part 1 are CSI part 1 of CSI report #n (for example, implementation 3-1-1 or 3-1-2). The multiple CSI fields in CSI part m may also be CSI part m of CSI report #n (for example, implementation 3-2-1 or 3-2-2).

[0418] 《Implementation 3-4》Coding / Rate Matching

[0419] The m UCI bit sequences of CSI part 1, CSI part 2, ..., CSI part m can also be encoded independently. When the actual coding rate is higher than the maximum coding rate, the CSI parts can also be discarded in descending order (first CSI part m is discarded, then CSI part m-1 is discarded, then CSI part m-2 is discarded, ...) until the coding rate meets the necessary conditions for the maximum coding rate.

[0420] Rel.15NR or at least one of the existing, code block segmentation, channel coding, and rate matching can also be applied to the m UCI bit sequences generated in implementation mode 3-3.

[0421] Fig.35 An example of m CSI parts is shown. CSI parts 1, 2, ..., m are coded independently. CSI parts 1, 2, ..., m are mapped in sequence. CSI part 2 of a CSI report contains Q (1) The CSI part m of a CSI report contains Q (m-1) A broadband PMI.

[0422] If the output sequence length E after rate matching is used tot , and the maximum coded bit length E for a coding rate that does not exceed the maximum PUCCH coding rate max , then the output sequence length of HARQ-ACK, SR and CSI part 1 combined when using two parts of CSI can also be min(E tot , E max The output sequence length based on the CSI part other than CSI part 1 (for example, CSI parts 2 to m) may also be E tot -min(E tot , E max ).

[0423] According to the third embodiment, a plurality of wideband PMIs are independently encoded in a plurality of CSI parts, thereby being able to improve reliability.

[0424] <Implementation Method 4> Method for Determining the Number of CSI Parts

[0425] In this embodiment, a method for determining or configuring one or more CSI parts of a CSI report is described.

[0426] 《Implementation Method 4-1》

[0427] In a system using implementation mode 1 (1-part CSI) and implementation mode 2 (2-part CSI), whether a CSI report contains one part or two parts can be explicitly set or indicated through at least one of RRC, MAC CE, and DCI, can be implicitly set or indicated through at least one of RRC, MAC CE, and DCI, and can also be determined by the UE and reported to the base station in the UCI.

[0428] Implementation Method 4-2

[0429] In a system using implementation mode 1 (1-part CSI) and implementation mode 3 (m-part CSI), whether a CSI report includes one part and which of the m parts can be explicitly set or indicated through at least one of RRC, MAC CE, and DCI, can be implicitly set or indicated through at least one of RRC, MAC CE, and DCI, and can also be determined by the UE and reported to the base station in the UCI.

[0430] When m is 2 or more, it includes a combination of Embodiments 1, 2, and 3. That is, the system may be a system using Embodiment 1 (1-part CSI), Embodiment 2 (2-part CSI), and Embodiment 3 (m-part CSI).

[0431] 《Implementation Method 4-3》

[0432] In a system using implementation mode 2 (2-part CSI) and implementation mode 3 (m-part CSI), whether a CSI report contains two parts or one of the m parts can be explicitly set or indicated through at least one of RRC, MAC CE, and DCI, or can be implicitly set or indicated through at least one of RRC, MAC CE, and DCI, and can also be determined by the UE and reported to the base station in the UCI.

[0433] (other)

[0434] In various embodiments, each DI wideband information may also be mapped after the corresponding PMI wideband information. For example, in CSI report #1, wideband DI information field #1 may also be mapped after the corresponding wideband PMI information field #1.

[0435] In the case where the PMI field #1 is located in CSI part 2, the DI field #1 may also be located in CSI part 2. In the case where the PMI field #1 is located in CSI part 1, the DI field #1 may also be located in CSI part 1.

[0436] If only the wideband PMI is normally received by the base station without the corresponding DI, the CSI may not be correctly reconstructed. After each DI wideband information is mapped to the corresponding PMI wideband information, the same priority as the wideband PMI can be given to the DI and can be used together with the wideband PMI.

[0437] (Wireless Communication System)

[0438] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0439] Fig.36 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0440] In addition, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (Radio Access Technology) (RAT) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0441] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0442] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0443] The wireless communication system 1 may also include: a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0444] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0445] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (lower than 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (higher than 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also correspond to a frequency band higher than FR2.

[0446] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0447] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station may also be referred to as an IAB node.

[0448] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0449] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0450] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0451] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

[0452] In the wireless communication system 1, as downlink channels, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)) and the like may be used.

[0453] In addition, in the wireless communication system 1, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like may be used.

[0454] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0455] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0456] In addition, the DCI for scheduling PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, PDSCH may also be replaced by DL data, and PUSCH may also be replaced by UL data.

[0457] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. One CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a certain search space based on the search space setting.

[0458] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0459] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) can also be transmitted through PUCCH. Random access preamble code for establishing connection with a cell can also be transmitted through PRACH.

[0460] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0461] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0462] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as an SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0463] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0464] (Base Station)

[0465] Fig.37 1 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0466] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and the base station 10 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0467] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0468] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0469] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0470] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0471] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0472] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0473] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0474] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0475] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0476] The transmitting and receiving unit 120 (RF unit 122 ) may perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0477] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0478] The sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0479] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (ReceivedSignal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0480] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0481] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0482] (User Terminal)

[0483] Fig.38 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided in one or more pieces.

[0484] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and the user terminal 20 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0485] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0486] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0487] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0488] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured by a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0489] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0490] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0491] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0492] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0493] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0494] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0495] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0496] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0497] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0498] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0499] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 , the transmitting and receiving antenna 230 , and the transmission path interface 240 .

[0500] The control unit 210 may also generate a channel state information report, i.e., a CSI report, wherein the CSI report includes a first field (e.g., a PMI wideband information field) representing each of a plurality of precoding matrix indicators, i.e., PMIs, and a second field (e.g., a DI wideband information field) representing a delay corresponding to the PMI. The transmitting and receiving unit 220 may also transmit the CSI report (implementation mode 1).

[0501] The CSI report may also include multiple groups of the first field and the second field.

[0502] The control unit 210 may also map the second field to after the first field in the CSI report.

[0503] The first field may also represent PMI broadband information.

[0504] The second field may also indicate an index of the delay corresponding to the PMI wideband information.

[0505] The control unit 210 may also generate a plurality of channel state information parts, i.e., a plurality of CSI parts, wherein at least one of the plurality of CSI parts includes a first field indicating each of a plurality of precoding matrix indicators, i.e., PMIs, and a second field indicating a delay corresponding to the PMI. The transmitting and receiving unit 220 may also transmit the plurality of CSI parts (embodiments 2 and 3).

[0506] The at least one CSI part may also include multiple groups of the first field and the second field.

[0507] The control unit 210 may also map the second field to after the first field in the at least one CSI part.

[0508] The first field may also represent PMI broadband information.

[0509] The second field may also indicate an index of the delay corresponding to the PMI broadband information.

[0510] (Hardware Structure)

[0511] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0512] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0513] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.39 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0514] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0515] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0516] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0517] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0518] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that enables a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0519] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0520] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0521] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. can also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) can also be installed by the transmitting unit 120a (220a) and the receiving unit 120b (220b) separately physically or logically.

[0522] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0523] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or different buses may be used between the devices.

[0524] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be installed using at least one of these hardware.

[0525] (Variation Example)

[0526] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0527] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0528] Here, the parameter set may also refer to a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0529] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0530] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0531] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0532] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0533] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0534] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may also be shorter than the TTI.

[0535] In addition, when one time slot or one mini time slot is referred to as TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling may also be controlled.

[0536] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard 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 TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0537] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0538] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0539] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0540] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0541] In addition, a resource block may also be composed of one or more resource elements (RE). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

[0542] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0543] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0544] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0545] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0546] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0547] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. In addition, the mathematical formulas, etc. using these parameters may also be different from those explicitly disclosed in the present disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0548] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0549] Furthermore, information, signals, etc. can be output from a high layer (upper layer) to a low layer (lower layer) or from a low layer to a high layer. Information, signals, etc. can also be input and output via a plurality of network nodes.

[0550] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0551] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof.

[0552] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0553] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0554] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0555] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0556] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0557] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0558] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0559] In the present disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro cell, and pico cell.

[0560] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0561] In the present disclosure, terms such as “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)”, and “terminal” can be used interchangeably.

[0562] In some cases, the mobile station is also referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a hand set, a user agent, a mobile client, a client, or some other appropriate terminology.

[0563] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0564] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, expressions such as "uplink" and "downlink" may also be replaced by expressions corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0565] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0566] In the present disclosure, operations are set to be performed by a base station, and sometimes by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by a base station, one or more network nodes other than the base station (for example, considering a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0567] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0568] The various modes and implementation modes described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems based on these. In addition, multiple systems can also be combined (for example, LTE or LTE-A, combination with 5G, etc.) for application.

[0569] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0570] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to a first and a second element does not mean that only two elements can be used, or that the first element must take precedence over the second element in some form.

[0571] The term "determining" as used in this disclosure may include a variety of operations in some cases. For example, "determining" may also be viewed as "judging", calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0572] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc.

[0573] In addition, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can also be regarded as a situation of "judgment (decision)" on some operations.

[0574] In addition, "judge (decide)" can also be replaced by "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0575] The “maximum transmit power” recorded in the present disclosure may indicate the maximum value of the transmit power, or may indicate the nominal maximum transmit power (the nominal UE maximum transmit power), or may indicate the rated maximum transmit power (the rated UE maximum transmit power).

[0576] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination of these. For example, "connection" may also be replaced by "access".

[0577] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0578] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted as "different".

[0579] In the present disclosure, when the terms "include", "including", and their variations are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0580] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0581] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the present invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A receiving unit receives setting information including multiple delays for a channel state information report (CSI report); and a control unit configured to control the transmission of a plurality of CSI reports corresponding to the plurality of delays, A CSI report of the plurality of CSI reports comprises a CSI part, The plurality of CSI fields within the one CSI part include quantized amplitudes and phases of coefficients corresponding to one of the plurality of delays.

2. A wireless communication method, which is a wireless communication method of a terminal, comprising: The step of receiving setting information including multiple delays for channel state information reporting (CSI reporting); and controlling the transmission of a plurality of CSI reports corresponding to the plurality of delays, A CSI report of the plurality of CSI reports comprises a CSI part, The plurality of CSI fields within the one CSI part include quantized amplitudes and phases of coefficients corresponding to one of the plurality of delays.

3. A base station, comprising: A sending unit, sending setting information including multiple delays for a channel state information report (CSI report); and a control unit configured to control reception of a plurality of CSI reports corresponding to the plurality of delays, A CSI report of the plurality of CSI reports comprises a CSI part, The plurality of CSI fields within the one CSI part include quantized amplitudes and phases of coefficients corresponding to one of the plurality of delays.

4. A system having a terminal and a base station, The terminal has: A receiving unit receives setting information including multiple delays for a channel state information report (CSI report); and a control unit configured to control the transmission of a plurality of CSI reports corresponding to the plurality of delays, The base station has: a sending unit, sending the setting information, A CSI report of the plurality of CSI reports comprises a CSI part, The plurality of CSI fields within the one CSI part include quantized amplitudes and phases of coefficients corresponding to one of the plurality of delays.

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