CN114287139A - Terminal and wireless communication method - Google Patents

Abstract

A terminal according to an embodiment of the present disclosure includes: a control unit which generates a plurality of CSI sections, which are a plurality of channel state information sections, wherein at least one CSI section of the plurality of CSI sections includes a first field indicating each of a plurality of PMIs, which are precoding matrix indicators, and a second field indicating a delay corresponding to the PMI; and a transmission unit that transmits the plurality of CSI components. This can prevent a decrease in reliability of CSI while suppressing an increase in UL overhead.

Description

Terminal and wireless communication method

Technical Field

The present disclosure relates to a terminal and a wireless communication method in a next generation mobile communication system.

Background

In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high data rate, low latency, and the like (non-patent document 1). In addition, LTE-Advanced (3GPP rel.10-14) is standardized for the purpose of further large capacity, Advanced, and the like of LTE (Third Generation Partnership Project (3GPP)) versions (Release (Rel.))8, 9).

Successor systems to LTE (e.g., also referred to as a 5th generation mobile communication system (5G)), 5G + (plus), New Radio (NR), 3GPP rel.15 and beyond) are also being studied.

Documents of the prior art

Non-patent document

Non-patent document 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Radio Access (E-UTRA) and Evolved Universal Radio Access Network (E-UTRAN); (ii) an Overall description; stage 2(Release 8) ", 4 months 2010

Disclosure of Invention

Problems to be solved by the invention

In rel.15 NR, wideband and subband are supported as frequency granularity (frequency granularity) of Channel State Information (CSI) report (reporting).

Here, the wideband is the entire band to be reported for CSI, and is, for example, the entire (licensed) Carrier (also referred to as Component Carrier (CC), cell, serving cell, or the like). A subband is a part of a wideband, and is, for example, one or more Physical Resource Blocks (PRBs) or Resource Blocks (RBs)). The size of the subband (subband size, e.g., the number of PRBs) may also be determined according to the size of the wideband (wideband size, e.g., the number of PRBs).

In future wireless communication systems (e.g., NRs after rel.16), it is also contemplated that at least one of a wide bandwidth (e.g., a bandwidth wider than rel.15 NR) and a high frequency band (e.g., a frequency band higher than one of 7.125GHz, 24.25GHz, 52.6GHz, a frequency band higher than rel.15 NR) can be utilized.

However, in future wireless communication systems, when a wideband to be a CSI report target is wideband-mapped, the size of a subband depending on the size of the wideband may become larger than a coherence (coherence) bandwidth, and as a result, reliability of CSI may deteriorate. On the other hand, in a wideband in which a wideband is formed, if the subband size is to be sufficiently smaller than the coherence bandwidth, uplink (ul) overhead may increase.

Accordingly, an object of the present disclosure is to provide a terminal and a wireless communication method that can prevent a decrease in reliability of CSI while suppressing an increase in UL overhead.

Means for solving the problems

A terminal according to an embodiment of the present disclosure includes: a control unit which generates a plurality of CSI sections, which are a plurality of channel state information sections, wherein at least one CSI section of the plurality of CSI sections includes a first field indicating each of a plurality of PMIs, which are precoding matrix indicators, and a second field indicating a delay corresponding to the PMI; and a transmission unit that transmits the plurality of CSI components.

Effects of the invention

According to one embodiment of the present disclosure, it is possible to prevent a decrease in reliability of CSI while suppressing an increase in UL overhead.

Drawings

Fig. 1 is a diagram illustrating an example of an operation of CSI reporting.

Fig. 2A and 2B are diagrams showing an example of feedback of broadband information.

Fig. 3 is a diagram showing an example of a precoder based on wideband information.

Fig. 4 is a diagram showing another example of a precoder based on wideband information.

Fig. 5 is a diagram showing another example of a precoder based on wideband information.

Fig. 6 is a diagram illustrating an example of a structure of a CSI report in UCI.

Fig. 7 is a diagram showing an example of CSI report # n according to embodiment 1.

Fig. 8 is a diagram showing another example of CSI report # n according to embodiment 1.

Fig. 9 is a diagram showing an example of mapping of CSI reports according to embodiment 1.

Fig. 10 is a diagram showing an example of the CSI portion 1 of the CSI report # n according to embodiment 2-2-1.

Fig. 11 is a diagram showing an example of the CSI portion 2 of the CSI report # n according to embodiment 2-2-1.

Fig. 12A and 12B are diagrams illustrating an example of mapping of CSI reports according to embodiment 2-2-1.

Fig. 13 is a diagram showing an example of UCI encoding and rate matching according to embodiment 2-2-1.

Fig. 14 is a diagram showing an example of the CSI component 1 of the CSI report # n according to embodiment 2-2-2.

Fig. 15 is a diagram showing an example of the CSI portion 2 of the CSI report # n according to embodiment 2-2-2.

Fig. 16 is a diagram showing an example of mapping of the CSI component 1 according to embodiment 2-2-2.

Fig. 17 is a diagram showing an example of mapping of the CSI component 2 according to embodiment 2-2-2.

Fig. 18 is a diagram showing an example of UCI encoding and rate matching according to embodiment 2-2-2.

Fig. 19 is a diagram showing an example of the CSI portion 1 of the CSI report # n according to embodiment 2-2-3-1.

Fig. 20A and 20B are diagrams showing an example of the CSI component 2 of the CSI report # n according to embodiment 2-2-3-1.

Fig. 21 is a diagram showing an example of the CSI portion 1 of the CSI report # n according to embodiment 2-2-3-2.

Fig. 22 is a diagram showing an example of wideband report #1 of CSI component 2 of CSI report # n according to embodiment 2-2-3-2.

Fig. 23A and 23B are diagrams showing examples of wideband reports # q-1 and # q of CSI component 2 of CSI report # n according to embodiment 2-2-3-2.

Fig. 24 is a diagram showing an example of mapping of CSI component 1 according to embodiment 2-2-3.

Fig. 25 is a diagram showing an example of mapping of the CSI component 2 according to embodiment 2-2-3.

Fig. 26 is a diagram showing an example of UCI encoding and rate matching according to embodiment 2-2-3.

Fig. 27 is a diagram showing an example of the CSI component 1 of the CSI report # n according to embodiment 3-1.

Fig. 28 is a diagram showing an example of the CSI portion 1 of the CSI report # n according to embodiment 3-2-1.

Fig. 29A and 29B are diagrams showing examples of the CSI part 2 and the CSI part m of the CSI report # n according to embodiment 3-2-1.

Fig. 30 is a diagram showing an example of the CSI component 1 of the CSI report # n according to embodiment 3-2-2.

Fig. 31 is a diagram showing an example of the CSI portion 2 of the CSI report # n according to embodiment 3-2-2.

Fig. 32A and 32B are diagrams showing examples of the CSI components m-1 and m of the CSI report # n according to embodiment 3-2-2.

Fig. 33 is a diagram showing an example of the CSI component 3 of the three-component CSI report # n according to embodiment 3-2-2.

Fig. 34A and 34B are diagrams illustrating an example of mapping of CSI reports according to embodiment 3.

Fig. 35 is a diagram showing an example of UCI encoding and rate matching according to embodiment 3.

Fig. 36 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment.

Fig. 37 is a diagram showing an example of the configuration of a base station according to an embodiment.

Fig. 38 is a diagram showing an example of the configuration of a user terminal according to an embodiment.

Fig. 39 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment.

Detailed Description

(CSI report or reporting)

In rel.15 NR, a terminal (also referred to as a User terminal, a User Equipment (UE)), or the like) generates (also referred to as determining, calculating, estimating, measuring, or the like) Channel State Information (CSI) based on a Reference Signal (RS) (or a resource for the RS), and transmits (also referred to as reporting, feedback, or the like) the generated CSI to a network (e.g., a base station). The CSI may be transmitted to the base station using, for example, an Uplink Control Channel (e.g., Physical Uplink Control Channel (PUCCH)) or an Uplink Shared Channel (e.g., Physical Uplink Shared Channel (PUSCH)).

The RS used for generating CSI may be at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal/Broadcast Channel (Synchronization Signal/Physical Broadcast Channel (SS/PBCH)) block, a Synchronization Signal (SS), a DeModulation Reference Signal (DMRS), and the like.

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 that contains SS and PBCH (and corresponding DMRS), and may also be referred to as an SS block (SSB) or the like. The SS may include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSs).

The CSI may also include a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS/PBCH Block Resource Indicator (SSBRI), a Layer Indicator (LI), rank Indicator (RI), L1-RSRP (Layer 1Reference 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)), and the like.

The UE may also receive information (report configuration) related to CSI reporting and control CSI reporting based on the report configuration information. The report setting Information may be, for example, "CSI-reportconfiguration" of an Information Element (IE) of a Radio Resource Control (RRC). In addition, in the present disclosure, the RRC IE may also be interpreted as an RRC parameter, a higher layer parameter, and the like.

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

Information relating to the type of CSI report (report type information, e.g., "reportConfigType" of RRC IE)

Information (report quantity information, e.g., "reporting quantity" of RRC IE) relating to more than one quantity (quantity) of CSI to be reported (more than one CSI parameter)

Information on the RS resource used for generation of the amount (the CSI parameter) (resource information, for example, "CSI-ResourceConfigId" of RRC IE)

Information on a frequency domain (frequency domain) to be a target of CSI reporting (frequency domain information, for example, "reportFreqConfiguration" of RRC IE)

For example, the report type information may also indicate (indicate) a Periodic CSI (P-CSI) report, an Aperiodic CSI (a-CSI) report, or a Semi-Persistent (Semi-Persistent ) CSI report (Semi-Persistent CSI (SP-CSI)) report.

Further, regarding the report volume information, a combination of at least one of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.) may also be specified.

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

In addition, the frequency domain information may also indicate frequency granularity (frequency granularity) of CSI reporting. The frequency granularity may also include, for example, wideband as well as subband. The wideband is a CSI reporting band (entire CSI reporting band). The Bandwidth may be, for example, the entire (licensed) Carrier (Component Carrier (CC)), cell, serving cell), or the entire Bandwidth part (BWP) in the certain Carrier. The wideband may be interpreted as a CSI reporting band, an entire CSI reporting band (entire CSI reporting band), or the like.

The sub-band is a part of a wide band, and may be composed of one or more Resource Blocks (RB) or Physical Resource Blocks (PRB)). The size of the subband may be determined according to the size of BWP (number of PRBs).

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

When the wideband PMI report is set (determined), one wideband PMI may be reported for use in the CSI reporting band as a whole. On the other hand, when the subband PMI report is set, a single wideband indication (single wideband indication) i may be used₁Is reported for the CSI report band as a whole, and indicates (one sub-band indication) i of each of one or more sub-bands in the CSI report as a whole₂(e.g., subband indication for each subband) is reported.

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

The PMI may also indicate a precoder matrix (also simply referred to as a precoder) that the UE considers suitable for downlink (dl) transmission to the UE. Each value of PMI may also correspond to one precoder matrix. The set of values of the PMI may also correspond to a set of different precoder matrices, referred to as a precoder codebook (also simply referred to as codebook).

In the spatial domain (space domain), the CSI report may also contain more than one type of CSI. For example, the CSI may also include at least one of a first type (type 1CSI) for selection of a single beam and a second type (type 2CSI) for selection of a multi-beam. A single beam may also be interpreted as a single layer, and multiple beams may also be interpreted as multiple beams. Furthermore, type 1CSI may not also assume multi-user Multiple Input Multiple Output (MIMO), and type 2CSI may also assume multi-user MIMO.

The codebook may include a type 1CSI codebook (also referred to as a type 1 codebook or the like) and a type 2CSI codebook (also referred to as a type 2 codebook or the like). The type 1CSI may include type 1 single-panel CSI and type 1 multi-panel CSI, or different codebooks (type 1 single-panel codebook and type 1 multi-panel codebook) may be defined.

Type 1 and type I may also be substituted for each other in this disclosure. Type 2 as well as type II may also be substituted for each other in this disclosure.

The Uplink Control Information (UCI) type may include at least one of a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), a Scheduling ReQuest (SR), and CSI. The UCI may be carried through a PUCCH or may be carried through a PUSCH.

In rel.15 NR, UCI can contain one CSI part for wideband PMI feedback. CSI report # n contains PMI wideband information in case of being reported.

In rel.15 NR, UCI can contain two CSI parts for subband PMI feedback. CSI part 1 contains wideband PMI information. The CSI part 2 contains one wideband PMI information and several subband PMI information. CSI part 1 and CSI part 2 are independently encoded.

The frequency granularity of CSI reporting as described above depends on the overhead of the uplink (ul). 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. Further, as the CSI reporting band (e.g., the size of BWP) becomes larger, the size of the subband is made larger, thereby preventing an increase in UL overhead caused by the reporting of CSI (e.g., PMI) per subband based on the enlargement of the CSI reporting band.

In NRs after rel.16, it is assumed that a wider bandwidth can be used than that of rel.15 NR. Further, in NR after rel.16, it is also assumed that a high frequency band (for example, a frequency band higher than one of 7.125GHz, 24.25GHz, and 52.6GHz, and a frequency band higher than rel.15 NR) can be used. The Frequency band may be referred to as a Frequency Range (FR) or the like.

In rel.15 NR, the subband size becomes smaller than a coherence bandwidth (bandwidth in which the frequency correlation size (amplitude, degree) becomes 90%), and therefore subband-based precoding is effective. For example, when the CSI reporting band is 51PRB, the coherence bandwidth may be 40PRB and the subband size may be 4 or 8 PRB.

On the other hand, when the CSI reporting band becomes wider than rel.15 NR, the subband size becomes larger than the coherent bandwidth, and as a result, the CSI reporting accuracy may deteriorate. For example, when the CSI reporting band is 260PRB, the coherence bandwidth is 12PRB, but the subband size is 16 or 32 PRB. On the other hand, if the ratio of the CSI report band to the subband size is maintained to be the same as the rel.15 NR (if the subband size is to be sufficiently smaller than the coherence bandwidth), UL overhead may increase.

As described above, in future wireless communication systems, problems such as an increase in UL overhead and a decrease in reliability of CSI become problems.

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

Therefore, the inventors of the present invention have conceived of suppressing an increase in UL overhead and preventing a decrease in reliability of CSI by feeding back information for a delay-domain precoder (for example, at least one of delay information and coefficient information described later) as information (wideband information) related to the entire CSI report band (wideband).

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The radio communication methods according to the respective embodiments may be applied individually or in combination.

(Wireless communication method)

In the present disclosure, precoder, precoding may also be interpreted from each other. In addition, precoding vectors, precoding matrices, channel vectors, channel matrices may also be interpreted from each other. Further, the delay can also be interpreted as an amount of delay (delay amount) or the like. The delay domain may be interpreted as a transform (transform) domain described later or one or more domains defined as the transform domain.

In the present disclosure, indicators (indicators), indications (indications) may also be substituted for each other.

In the present embodiment, the description will be made centering on the delay domain precoder, but it is only necessary to use at least the delay domain. For example, the present invention can be suitably applied to a precoder (also referred to as a one-dimensional transform domain precoder, a one-dimensional sparse transform domain precoder, a space-delay domain precoder, or the like) using a spatial domain and a delayed domain (space-delay domain), a precoder (also referred to as a two-dimensional transform domain precoder (2D-TDP), a two-dimensional sparse transform domain precoder (2D sparse TDP), an angle-delay domain precoder, or the like) using an angular-delay domain (angular-delay domain). The angle may also be an arrival angle (angle of arrival) or a radiation angle (angle of departure).

(delay domain precoder)

The following description will be made centering on information for a delay domain pre-coder to be fed back as wideband information.

< delay Domain precoder >

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

Coefficients (coefficient(s) for Q delays g) for Q delays (Q different delay values)

Delay(s) for coefficient g or delay (quantized delay) after quantization

Here, the coefficient g may be defined for each of the Q delays (for each delay). For example, g ∈ C^Q×1. The delay τ for the coefficient g may be τ e R^Q×1. Here, R^Q×1Or a set of Q delays tau that are not quantized. Further, τ for the quantized delay may be τ e N^Q×1. Here, N^Q×1Or a set of quantized Q delays tau. In addition, delay may also be interpreted as delay time, or the like.

The coefficient g may be converted (transformed) from the delay domain to the frequency domain by multiplying (multiply) the 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) may also be obtained (obtained) (derived) by transformation from this delay domain into the frequency domain.

For example, precoder d for N subcarriers based on coefficient g and delay τ may be represented by equation 1 below. In addition, in equation 1, Q is the number of delays τ or coefficients g. Q is the subscript of the delay τ or coefficient g, Q is 0. ltoreq. q.ltoreq.Q. In addition, N is the subscript of the subcarrier, and N is greater than or equal to 0 and less than or equal to N.

[ mathematical formula 1]

Here, the coefficient of the subcarrier # n (nth subcarrier) in the delay # q (qth delay) transformed to the frequency domain may be represented by the following expression 2. Further, the power normalization (power normalization) can also be represented by the following formula 3.

[ mathematical formula 2]

For example, in the case where the number of delays Q is 1, 2, 3, the precoder d of subcarrier # N (0. ltoreq. N. ltoreq.N)_Q,nThe following expressions 4, 5, and 6 may be used.

[ mathematical formula 3]

For example, in equation 4, the number of delays Q is 1, and thus the precoder d of the subcarrier # n in #0 is delayed_1,nThe delay may be represented by a coefficient g for delay #0(q is 0)₀And a delay τ for coefficient #0₀Result g of multiplication of₀·e^-j2πnτ0Is derived.

In equation 5, since the number of delays Q is 1, the precoders d of subcarriers # n in #0 and #1 are delayed_2,nPrecoder d of subcarrier # n in #0 can also be delayed_1,nAnd the coefficient for delay #1(q is 1)g₁Delay τ for sum coefficient #1₁Result g of multiplication of₁·e^-j2πnτ1Is derived as a result of the addition.

In equation 6, since the number of delays Q is 3, the precoder d of the subcarrier # n in #0 to #2 is delayed_3,nThe precoder d of the subcarrier # n in #0, #1 may also be delayed_2,nAnd a coefficient g for delay #2(q is 2)₂Delay τ for sum coefficient #2₂Result g of multiplication of₂·e^-j2πnτ2Is derived as a result of the addition.

As described above, the coefficient g for the delay domain pre-coder may be converted from the delay domain to the frequency domain by multiplying the coefficient g by the corresponding delay τ. The coefficient d in the frequency domain may be obtained by adding the transformed coefficient.

< CSI report >

The UE may also feed back one or more pieces of information (one or more pieces of wideband information) related to the entire CSI reporting band (wideband) to the base station. Specifically, the UE may also estimate a channel in a certain (certain) domain and decide the wideband information based on the estimated channel (channel matrix).

For example, the UE may estimate the channel in the spatial and frequency domains and transform (transform) the estimated channel matrix into a transform domain. Alternatively, the UE may estimate the channel in the transform domain.

Here, the transform domain is, for example, a domain for a precoding scheme (precoding scheme) different from at least one of the time domain, the frequency domain, and the spatial domain. The transform domain may be one of the following or a domain in which at least two of the following are combined, for example.

Delay field

Delay-angle domain

Delay-space domain

Sparse domain (sparse domain)

A domain transformed or derived from at least one of the frequency domain and the time domain

A domain associated with at least one of the frequency domain and the time domain

A domain related to at least one of delay and angle (related to)

Sparse (sparse) domains

Channel estimation in the spatial and frequency domains

When performing channel estimation in the space-frequency domain, the UE may convert the estimated channel (channel matrix) into a transform domain and feed back information (channel information) related to the converted channel (channel matrix) to the base station as the wideband information.

Alternatively, the UE may calculate a precoder in a transform domain based on a channel (channel matrix) estimated in the space-frequency domain, and feed back information (precoder information) related to the transform precoder to the base station as the wideband information.

Channel estimation in the transform domain

When performing channel estimation in the transform domain, the UE may feed back information (channel information) related to the estimated channel (channel matrix) to the base station.

Alternatively, the UE may calculate a precoder in the transform domain based on a channel (channel matrix) estimated in the transform domain, and feed back information (precoder information) related to the transform precoder to the base station as the wideband information.

Determination of precoder (channel) vector

The base station may obtain (determine) a precoder vector (or a channel vector) in each subcarrier, each PRB, or a plurality of PRBs by multiplying one or more pieces of wideband information (for example, the above-described channel information or precoder information).

Fig. 1 is a diagram illustrating an example of the operation of CSI reporting according to the first embodiment. As shown in fig. 1, in step S101, the base station transmits the RS. In step S102, the UE estimates a channel in a given (given) domain (e.g., a space-frequency domain, or a transform domain) based on the RS from the base station.

The UE determines channel information related to the estimated channel (channel matrix) or precoder information related to a precoder determined based on the estimated channel (channel matrix). As described above, when channel estimation is performed in the space-frequency domain, the channel information or precoder information may be determined after changing the channel (channel matrix) estimated in the space-frequency domain to the transform domain.

In step S103, the UE transmits one or more wideband information (e.g., one or more channel information or one or more precoder information). Fig. 2A and 2B are diagrams illustrating an example of feedback of the broadband information according to the first embodiment.

For example, as shown in fig. 2A, the UE may feed back one piece of wideband information and information on subbands #1 to # k (k >1) to the base station (may also be referred to as a subband PMI report or the like).

As shown in fig. 2B, the UE may also feed back a plurality of wideband information #1 to # Q (1< Q < < k) to the base station (which may also be referred to as a wideband PMI report or the like).

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

As described above, in the present embodiment, based on the report setting information (for example, "CSI-ReportConfig" of RRC IE), a single wideband information and information related to each subband may be reported (for example, fig. 2A), and a plurality of wideband information may be reported (for example, fig. 2B). The UE may also decide which of the single or multiple pieces of wideband information to feedback based on at least one of the above-mentioned reported amount information (e.g., "reporting quantity" of the RRC IE) and frequency domain information (e.g., "pmi-format indicator" of the RRC IE).

< definition of delay Domain precoder (definition) >

First definition

In the first definition, a delay domain precoder may be introduced instead of a subband-based precoder (subband-based precoder). Specifically, in a certain Frequency Range (FR)), the subband-based precoder may not be supported, and the delay domain precoder may be supported.

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

The UE may also receive configuration (configuration) information (delay domain precoder configuration information) related to the delay domain precoder. The delay domain precoder setting information may be supported instead of the setting information on the subband-based precoder (subband-based precoder setting information, for example, a parameter related to a subband in "reportFreqConfiguration" of the RRC IE).

Second definition

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

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

The UE may also receive information indicating which of the subband-based precoder or the delay domain precoder to apply (application information, e.g., "pmi-format indicator" of RRC IE). The UE may also receive at least one of the delay domain precoder setting information and subband-based precoder setting information described above.

< CSI parameters for delay-Domain precoders >

In rel.15 NR, CSI parameters may also be calculated based on a given rule. The rule may also be based on dependencies between CSI parameters. For example, the LI may also be calculated based on the reported CQI, PMI, RI, and CRI. Further, the CQI may be calculated based on the reported PMI, RI, and CRI. In addition, the PMI may also be calculated based on the reported RI and CRI. The RI may also be calculated based on the reported CRI.

In the first aspect, the CSI may include a parameter for the delay pre-coder. The parameter for the delay pre-coder may include at least one of the following parameters, for example.

A coefficient g (e.g., g ∈ C) for Q delays (Q different delay values)^Q×1) Related information (coefficient information)

Information relating to the delay(s) for the coefficient g (e.g., τ ∈ R)^Q×1) Or information related to the quantized delay (e.g., τ ∈ N)^Q×1) Hereinafter, information on the delay τ for the coefficient g and information on the quantized delay τ are collectively referred to as delay information.

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

Delay information

The delay information may be information indicating each delay τ (also referred to as a Delay Indicator (DI)), for example. Delay of q_qThe value of (b) may be unquantized (non-qualified) or may be quantified.

In the case of not being quantized, it may also be τ, for example_qe.R and τ_qIs more than or equal to 0. Here, R may also be a set of Q delays τ that are not quantized.

On the other hand, in the case of quantization, for example, τ may be used_q＝m·T_DP. Here, m.di-elect cons.N. N may also be a set of Q delays τ after quantization. T is_DPOr can beThe unit of quantization. E.g. T_DPOr may be the inverse of the bandwidth (reciprocal), i.e. 1/bandwidth. The bandwidth may be the number of resource blocks constituting the bandwidth. The bandwidth in a wideband system is large compared to the sub-bands, and therefore it is possible to use T_DPTo increase the particle size.

DI fed back as CSI may represent the delay τ_qDelay tau adjacent to_q+1(or. tau)_q-1) The shift (offset) between, which may also mean the delay τ_qWith initial delay τ₁Or may also represent a delay τ_qThe amount itself. The offset (offset) can be interpreted as a gap (gap), an offset amount, a difference (difference), or the like.

For example, the delay τ is expressed in DI_qDelay tau adjacent to_q+1(or. tau)_q-1) In the case of the offset therebetween, the offset Δ τ may be expressed by the following equation 7.

(formula 7)

Δτ＝[Δτ₁，…，Δτ_Q-1]Here, Δ τ_q＝τ_q+1-τ_q(e.g., 1. ltoreq. Q. ltoreq. Q-1)

In addition, the delay τ is represented by DI_qWith initial delay τ₁In the case of the offset therebetween, the offset Δ τ may be expressed by the following equation 8.

(formula 8)

Δτ＝[Δτ₁，…，Δτ_Q-1]Here, Δ τ_q＝τ_q+1-τ₁(e.g., 1. ltoreq. Q. ltoreq. Q)

In addition, the delay τ is represented by DI_qIn the case of the amount itself, the delay τ may be represented by the following equation 9.

(formula 9)

τ＝[τ₁，…，τ_Q](e.g., 1. ltoreq. Q. ltoreq. Q)

The above formulas 7 to 9 are merely examples, and are not limited to the above formulas. For example, in formulas 7 to 9, the subscript Q of the delay τ may preferably range from 0. ltoreq. q.ltoreq.Q2 (or Q-1). In formula 7, Δ may beτ_q＝τ_q-τ_q-1In this case, τ may be_q-10. In formula 8, Δ τ may be_q＝τ_q-τ₀(for example, in the case where q.ltoreq.Q-1 is 0. ltoreq. Q).

Coefficient information

The coefficient information may be information indicating a Matrix (Matrix) for Delay Precoding (Delay Precoding Matrix Indicator (DMI)), or may be information indicating a Precoding Matrix Indicator (PMI)) that is used in the past.

For example, the DMI may also express the delay domain precoder in an explicit (explicit) or implicit (implicit) manner. The 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 correction to the existing PMI.

On the other hand, the delay domain precoder may also be explicitly or implicitly represented by PMI in rel.15 NR. In this case, the existing signaling for the PMI can be reused.

The DMI or PMI (DMI/PMI) may be information indicating the coefficient g explicitly or may be information indicating the coefficient g based on a codebook.

The DMI/PMI may (1) indicate the amplitude (amplitude) and phase (phase) of the quantized coefficient g, (2) indicate the quantized coefficient g based on the modulation order (or modulation scheme), or (3) indicate the unquantized coefficient g.

Alternatively, (4) one or more codebooks (for example, a plurality of codebooks of different sizes) may be defined. In this case, the DMI/PMI may indicate a coefficient g selected from the corresponding codebook.

For example, the coefficient g is expressed by the following expression 10.

[ mathematical formula 4]

(1) Amplitude and phase of quantized coefficient g

The amplitude of the above coefficient g may also be quantized based on a given (given) number (e.g., number of bits) n. The quantized set (quantization set) can also be represented by {1/2^ n, 2/2^ n, …, 1} "0: 1/(2 ^ n-1): 1' is specified. "0: 1/(2 ^ n-1): 1' may also be a set of fractions comprising 0 and 1, and 1/(2 ^ n-1) between 0 and 1, and 1 for each increment (incriment). For example, in the case where n is 2, the set of quantizations may also be {1/4, 1/2, 3/4, 1 }. In addition, in the case where n is 3, the quantized set may be {1/8, 2/8, 3/8, 4/8, 5/8, 6/8, 7/8, 1 }.

The UE may select a value (close value) closest to the amplitude of the coefficient g from the quantized set. For example, when n is 3, the amplitude before and after quantization may be expressed as follows.

[ math figure 5]

Further, the phase of the coefficient g may be quantized based on a given (given) number (e.g., bit number) m. The quantized set may 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 set of quantizations may also be { -pi, -pi/2, 0, pi/2 }.

The UE may also select a value (close value) closest to the phase of the coefficient g from the quantized set. For example, when m is 2, the phases before and after quantization may be expressed as follows.

[ mathematical formula 6]

Note that pi may be a specific value, and for example, may be quantized to-pi instead of-1/2 pi.

(2) Quantized coefficient g based on modulation order

The set of modulations order based quantization may also be a constellation with a value of the power n of 2 normalized by the largest amplitude on the constellation (constellation). Here, n may also be a given (given) number (e.g., each modulation order).

For example, in the case of n ═ 2, Quadrature Phase Shift Keying (QPSK) is used, and the quantized set may be {0.7071+0.7071i, 0.7071-0.7071i, -0.7071+0.7071i, -0.7071-0.7071i }.

Note that when n is 3, the Modulation is 16 Quadrature Amplitude Modulation (QAM) (for example, by using a Quadrature Amplitude Modulation (QAM)) (for example, a Quadrature Amplitude Modulation (QAM) Modulation method is used)

QAM for normalization), the set of quantizations may 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+0.7071i, -0.2357-0.2357i, -0.2357-0.7071i, -0.7071-0.2357i, -0.7071-0.7071i }.

The UE may also select a value closest to the coefficient g from the quantized set. For example, when n is 4, the coefficients g before and after quantization may be expressed as follows.

[ math figure 7]

Alternatively, codebooks of different sizes may be defined. In this case, the DMI/PMI may indicate a coefficient g selected from the corresponding codebook.

The QAM may include not only 16QAM but also 64QAM, 256QAM, and the like.

(3) Code book

More than one codebook (e.g., a plurality of codebooks of different sizes) may be defined. As the codebook, a Discrete Fourier Transform (DFT) matrix of a certain (certain) size (for example, the size of the nth power of 2 × 2) may be used. Here, n may also be a given number (e.g., the number of feedback bits).

For example, when n is 1, one or more matrices of 2 × 1 may be defined in the codebook (also referred to as DFT codebook or the like). For example, the codebook may be represented as follows.

[ mathematical formula 8]

The UE may select a vector having a closest distance to the coefficient g in the codebook. For example, when n is 1, a vector selected from the codebook to be used for the coefficient g (see equation 10) may be expressed as follows. The coefficients g before and after quantization can also be expressed as follows.

[ mathematical formula 9]

< precoder Generation in frequency Domain >

As described above, in rel.15 NR, in the case where a subband PMI report is set to a UE, the UE feeds back a wideband PMI and a subband PMI for each subband to a base station. The base station may also decide the matrix W based on the wideband PMI₁And deciding a matrix W of each subband based on the subband PMI of each subband₂。

The UE may also be based on the matrix W₁And W₂A precoder matrix W for precoding used for downlink transmission (e.g., PDSCH) is determined. For example, the precoder matrix may be calculated by equation 11 below.

(formula 11)

W＝W₁W₂

On the other hand, when the UE feeds back each wideband information (for example, at least one of coefficient information and delay information), how to specify the precoder d becomes a problem.

In the first aspect, the precoder d in the frequency domain (which may be obtained from the codebook g) may 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, precoder d may be determined using equation 12 below.

[ mathematical formula 10]

Here, Q is the total number of delays, and Q is the subscript of the delay. N is the total number of subcarriers, and N is the subscript (index) of the subcarriers.

Fig. 3 is a diagram showing an example of a precoder based on the wideband information according to the first aspect. In fig. 3, for example, a one-dimensional sparse transform domain precoder (1dimension (1D) -sparse transform domain precoder) (space-delay domain precoder) may be used.

In fig. 3, as described in fig. 2B, it is assumed that m (m >1, and m ═ 2 in this case) pieces of wideband information are reported from the UE. Each wideband information may include at least one of delay information (for example, the DI) and the coefficient information (for example, the DMI/PMI).

For example, in fig. 3, the total number of delays Q is 2, and wideband information #1 and #2 are reported from the UE to the base station. The wideband information #1 may also contain a value indicating the delay τ₁DI of (D) and represents the delay τ₁By a factor g₁DMI/PMI of (1). Further, the wideband information #2 may include a value indicating the delay τ₂DI of (D) and represents the delay τ₂By a factor g₂DMI/PMI of (1). In addition, g₁、g₂May be equal toThe number of antennas is relevant.

As shown in fig. 3, precoder W for subcarrier # i (1 ≦ i ≦ n) for the case of Q ≦ 2⁽ⁱ⁾The determination may also be made based on at least one of the DI and the DMI/PMI contained in each of the m pieces of broadband information.

For example, in fig. 3, the precoder W⁽ⁱ⁾Or may be based on the delay τ expressed by DI within the wideband information #1₁And a coefficient g expressed by DMI/PMI₁And a delay τ in the wideband information #2 indicated by DI₂And a coefficient g expressed by DMI/PMI₂And is determined.

In addition, in FIG. 3, the index # i of the subcarrier is 1. ltoreq. i.ltoreq.n, but is not limited thereto, and may be 0. ltoreq. i.ltoreq.n-1.

Fig. 4 is a diagram showing another example of a precoder based on the wideband information according to the first aspect. In fig. 4, for example, a two-dimensional sparse transform domain precoder (2dimension (2D) -sparse Transform Domain Precoder (TDP), angle-delay domain precoder) may be used. In fig. 4, the angle field and the delay field may be combined (joint).

In fig. 4, it is assumed that information related to space (spatial information) is reported from the UE, in addition to m (m >1, where m ═ 2) pieces of wideband information. Each wideband information may include at least one of delay information (for example, the DI) and the coefficient information (for example, the DMI/PMI).

The spatial information may include information related to at least one of a waveform number (a "-" is added above W) of a codeword W selected from the codebook W and the angle θ. In addition, the size of the codebook W may also be related to channel correlation (channel correlation).

As shown in fig. 4, precoder W for subcarrier # i (1 ≦ i ≦ n) for the case of Q ≦ 2⁽ⁱ⁾The determination may be made based on DI and DMI/PMI included in each of the m pieces of wideband information, and at least one of the angle θ and the codeword w wave number determined by the spatial information.

For example, in fig. 4, the precoder W⁽ⁱ⁾Based on the delay τ expressed by DI within the wideband information #1₁And the coefficient g wave number represented by DMI/PMI⁽¹⁾Delay τ expressed by DI in wideband information #2₂And the coefficient g wave number represented by DMI/PMI⁽²⁾And an angle theta and a code word w wave number determined by the spatial information. In addition, in FIG. 4, the index i of the subcarrier is 1. ltoreq. i.ltoreq.n, but is not limited thereto, and may be 0. ltoreq. i.ltoreq.n-1.

Here, precoder W at subcarrier # i (1. ltoreq. i. ltoreq.n) of FIG. 4⁽ⁱ⁾A (θ) used for determining (a) may be defined by the following equations 13 and 14.

[ mathematical formula 11]

(formula 13)

A(θ）＝[a(θ₁)，...，a(θ_L)]

Here, M is the number of antennas or Radio Frequency (RF) chains (chain). L (═ Q) is the vector g_mAnd theta_mLength of (d). g_mlAnd theta_mlAre respectively a vector g_mAnd theta_mThe L (L is more than or equal to 1 and less than or equal to L) element. d is the antenna space. Further, λ_CIs the wavelength.

Fig. 5 is a diagram showing another example of a precoder based on the wideband information according to the first aspect. Fig. 5 may be different from fig. 4 in that the precoders in the angle domain and the delay domain are different. In fig. 5, the difference from fig. 4 may be that the code word and the angle θ are delayed by τ_qIs not common but for each delay tau_qThe codeword (i.e., for each wideband information) is reported along with the angle theta. The following description focuses on differences from fig. 4.

In fig. 5, it is assumed that m (m >1, where m ═ 2) pieces of wideband information are reported from the UE. Each wideband information may include at least one of information (codeword information) related to a codeword for delay τ and information (angle information) related to angle θ, in addition to delay information (for example, the DI) and the coefficient information (for example, the DMI/PMI).

As shown in fig. 5, precoder W for subcarrier # i (1 ≦ i ≦ n) for the case of L ≦ 2⁽ⁱ⁾The determination may be made based on at least one of DI and DMI/PMI included in each of the m pieces of wideband information, an angle θ determined based on the angle information, and a codeword determined based on the codeword information.

For example, in fig. 5, the precoder W⁽ⁱ⁾Based on the delay τ expressed by DI within the wideband information #1₁Coefficient g expressed by DMI/PMI₁Angle theta₁And codeword w wave number, and delay τ in wideband information #2 indicated by DI₂Coefficient g expressed by DMI/PMI₂Angle theta₂And a codeword, are determined.

In addition, A (θ) of FIG. 5₁) And A (theta)₂) The same may be defined as in the above-described formulas 12 and 13, respectively. In addition, in FIG. 5, the index i for the subcarrier is 1. ltoreq. i.ltoreq.n, but is not limited thereto, and may be 0. ltoreq. i.ltoreq.n-1.

As described above, the UE feeds back each wideband information including at least one of the delay information and the coefficient information. The base station determines a precoder for each subcarrier based on each wideband information. This makes it possible to reduce UL overhead and prevent a decrease in CSI reliability even if the wideband to be reported for CSI is made wideband.

(CSI structure)

Fig. 6 is a diagram illustrating an example of a structure of a CSI report in UCI. Here, the number of CSI reports may also be n. The number of CSI parts within one CSI report may also be m. The number of wideband PMI feedback (e.g., PMI wideband information field) within CSI part 1 (within a CSI report without more than one CSI part, or within CSI part 1 of more than one CSI part) may also be Q₀. The number of wideband PMI feedbacks other than CSI part 1 may also be Q. The number of wideband PMI feedbacks within CSI portion m may also beIs Q^(m). The number of wideband reports within one CSI part may also be q. The number of wideband PMI feedbacks within a wideband report Q may also be Q^(q). Q wideband PMI feedback may also be partitioned into Q wideband reports. The number of wideband PMI feedbacks contained in wideband reports #1, #2, …, and # Q may be Q, respectively⁽¹⁾、Q⁽²⁾、…、Q^(q)。

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

In the present disclosure, wideband PMI information, PMI wideband information field, wideband PMI feedback may also be substituted for each other. In the present disclosure, DI, wideband DI information, DI wideband information field, wideband DI feedback may also be substituted for each other.

The feedback for the aforementioned 2D sparse TDP may be a set of (τ, g wave number), a set of (θ, w wave number), or a combination thereof. Here, the delay domain is a transform domain (transformed domain) of the frequency domain, and the angle domain is a transform domain (transformed domain) of the spatial domain.

τ denotes the delay and the g-wave number denotes the coefficient in the corresponding delay. θ represents an angle, and w denotes a coefficient in the corresponding angle.

In the following embodiments, an example using feedback in the delay domain will be described. That is, the effects of both (θ, w wave number) and g wave number are combined (merge) to g, whereby the UE feeds back (τ, g). g denotes the coefficients of all antennas or angles in the corresponding delay.

For example, two delays and two angles may also be used in 2D sparse TDP, first calculating (τ)₁G wave number₁)、(τ₂G wave number₂)、(θ₁W wave number₁)、(θ₂W wave number₂). The UE may also calculate g from these values using equation 15 below₁And g₂。

[ mathematical formula 12]

Thus, the UE feeds back (τ)₁，g₁) And (tau)₂，g₂) Two of these. g₁、g₂It may correspond to PMI wideband information fields (wideband PMI information), respectively. Tau is₁，τ₂And may also correspond to a Delay Index (DI) or delay indicator (delay indicator), respectively, wideband information field (wideband DI information).

The UE may also report (τ, g wave number) and (θ, w wave number). In this case, (τ (DI), g (pmi)) may be replaced with (τ, g wave number) or may be replaced with (θ, w wave number) in the rules of the following embodiments.

In the CSI report shown in the following figures, some fields may be omitted, or some other fields may be added to the CSI report. In the CSI report shown in the following figures, the kind and order of the fields are not limited to the examples of the figures.

< embodiment 1> one CSI section

In this embodiment, a case where one CSI report includes one CSI component will be described. For one or more wideband PMI feedback, it is also possible that CSI bit generation within the UCI is defined without more than one CSI part.

EXAMPLE 1-1 CSI field

Multiple CSI fields within one CSI report may also contain Q₀Individual wideband PMI feedback (e.g., PMI wideband information field). The CSI field of one CSI report may further include Q when being reported₀A delay index (DI, e.g., DI wideband information field) corresponding to each of the wideband PMI feedbacks.

[ embodiment modes 1-1-1]

Or Q may be₀1. That is, multiple CSI fields within one CSI report may also contain one wideband PMI feedback. The CSI field of a CSI report may also further contain DI in case of being reported.

For example, as shown in fig. 7, CSI report # n may include wideband PMI feedback or a codebook index, and when reported; and the corresponding DI, if reported.

[ embodiments 1-1-2]

Or Q may be₀Not less than 1. That is, multiple CSI fields within one CSI report may also contain multiple wideband PMI feedbacks. The CSI field of one CSI report may also further contain DI in case of being reported.

[ [ embodiment modes 1-1-2-1] ]

Q₀May 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).

[ [ embodiments 1-1-2-2] ]

Q₀May also be determined by the UE and reported to the base station in UCI or other.

[ [ embodiments 1-1-2-3] ]

Q₀May 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). Q₀May also be determined by the UE and reported to the base station in UCI or other. Q₀The value of (d) may be equal to or less than the set maximum value.

For example, as shown in fig. 8, CSI report # n may include a plurality of wideband PMI feedbacks or codebook indices in the case of being reported, and Q of corresponding DI in the case of being reported₀And (4) grouping. In embodiment 1-1-2-1, CSI report # n may not include Q₀The value of (c). In embodiment 1-1-2-2 and embodiment 1-1-2-3, CSI report # n may include Q₀The value of (c).

The DI may also be reported together with the PMI except for the following two cases.

Case 1: the DI assumed to be for the original PMI is always 0 and does not need to be reported.

Case 2: in the case where the setting of CSI reporting does not include DI, DI is not reported by the UE.

Embodiment 1-2 UCI bit sequence Generation

In case that a CSI report having more than one part does not exist, CSI fields of all CSI reports may also be mapped to secondary a₀Starting UCI bit sequence a₀，a₁，…，a_A-1. In other cases, the UCI bit sequence may be generated according to embodiment 2 or embodiment 3 described later.

For example, as shown in fig. 9, in a CSI report in which there is no CSI report having more than one part, CSI fields of all CSI reports #1, #2, … # n in ascending order of CSI report priority (priority value, priority order) may also be mapped to UCI bit sequence a, respectively₀，a₁，…，a_A-1. Here, the CSI field of CSI report # n may be the example shown in fig. 7 or fig. 8 described above. Or a ═ n.

Rel.15 NR or at least one of existing code block segmentation, channel coding, and rate matching may be applied to the UCI bit sequence generated in embodiment 1-2.

According to this embodiment, when one CSI report has one CSI part, the wideband PMI can be appropriately reported.

< embodiment 2> two CSI sections

In this embodiment, a case where one CSI report includes two CSI components will be described.

For multiple wideband PMI feedback, CSI bit generation in UCI with two-part CSI reporting may also be defined.

Compatibility can be maintained for rel.15 NR.

EXAMPLE 2-1 CSI field of CSI portion 1

The multiple CSI fields of one CSI report in the CSI component 1 may also include: indicator of number of multiple wideband PMI feedbacks, Q, in CSI part 2, if reported, and Q, if reported₀Wideband PMI feedback (e.g., PMI wideband signaling)Information field). The CSI field of one CSI report in CSI part 1 may also further comprise: and Q in case of being reported₀A DI (e.g., DI wideband information field) corresponding to each of the wideband PMI feedbacks.

[ embodiment mode 2-1-1]

For the 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 only in the case of being reported may be appended.

For one wideband PMI feedback, CSI bits within the UCI defined in embodiment 1 may also be used for generation. In embodiment 2, only the plurality of wideband PMI feedbacks may be considered.

[ embodiments 2-1-2]

The multiple CSI fields of one CSI report in CSI part 1 may also include: at least one of one wideband PMI feedback in case of being reported, and an indicator of the number of the plurality of wideband PMI feedbacks in CSI part 2 in case of being reported. The multiple CSI fields of one CSI report in CSI part 1 may also further include: DI in case of being reported.

The CSI portion 1 contains one wideband PMI feedback, and thus performance degradation can be suppressed even in the case where the CSI portion 2 is discarded.

[ embodiments 2-1-2]

The multiple CSI fields of one CSI report in CSI part 1 may also include: q in case of being reported₀At least one of a number of wideband PMI feedbacks and, if reported, an indicator of a number of the plurality of wideband PMI feedbacks in CSI part 2. The multiple CSI fields of one CSI report in CSI part 1 may also further contain DI in case of being reported.

For Q₀The setting or definition of (1) can be applied to the embodiments 1 to 2.

The flexibility of wideband PMI feedback can be improved.

For example, as shown in fig. 10, CSI portion 1 of CSI report # n may also include: wideband PMI feedback or codebook index and in case of being reportedQ of DI in case of being reported₀Group, and number of wideband PMI feedbacks Q indicator in CSI part 2 if reported.

EXAMPLE 2-2 CSI field of CSI portion 2

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

[ embodiment mode 2-2-1]

CSI part 2 of one CSI report may also comprise: one wideband report in case of being reported, wherein the one wideband report contains Q wideband PMI feedbacks (e.g., PMI wideband information fields). The wideband report may also further contain a DI (e.g., DI wideband information field) corresponding to each of the Q wideband PMI feedbacks if reported.

[ [ embodiment mode 2-2-1-1] ]

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 embodiment 2-1, and indicated (reported) by an indicator of the number of wideband PMI feedbacks Q in CSI portion 1.

For example, as shown in fig. 11, CSI part 2 of CSI report # n may also include: wideband PMI feedback in case of reported and Q groups of DI in case of reported, and an indicator of the number of multiple wideband PMI feedbacks in CSI part 2 in case of reported.

[ [ embodiment modes 2-2-1-2] ]

In case that at least one CSI report is two parts, it may also be 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.

For CSI part 1, the CSI fields of all CSI reports #1, #2, … # n may also be mapped to a in the order from top to bottom of fig. 12A, respectively⁽¹⁾ ₀，a⁽¹⁾ ₁，…a⁽¹⁾ _A(1)-1. Here, the CSI field of CSI report # n may be the example shown in fig. 7, 8, or 10. Or may be A⁽¹⁾N. For CSI part 2, the CSI fields of all CSI reports #1, #2, … # n may also be mapped to a in the order from top to bottom of fig. 12B, respectively⁽²⁾ ₀、a⁽²⁾ ₁、…a⁽²⁾ _A(2)-1. Here, the CSI field of CSI report # n may be the example shown in fig. 11 described above. Or may be A⁽²⁾＝n。

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

[ [ embodiments 2-2-1-3] ]

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

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

As shown in fig. 13, CSI part 1 and CSI part 2 may also be independently encoded. The CSI part 2 contains a wideband report of a plurality of CSI reports. The wideband report of one CSI report contains Q wideband PMIs.

The UE may also drop CSI part 2 first and then CSI part 1 in case the actual coding rate exceeds the desired value.

If the output sequence length E after rate matching is used_totAnd a maximum code bit length E for a code rate that does not exceed the maximum PUCCH code rate_maxThe output sequence of HARQ-ACK and SR in case of using two-part CSI, together with CSI part 1The column length may also be min (E)_tot，E_max). The length of the output sequence based on CSI part 2 may also be E_tot-min(E_tot，E_max)。

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

[ embodiment modes 2-2-2]

CSI part 2 of one CSI report may also contain two wideband reports. The two wideband reports may also each contain Q⁽¹⁾Individual wideband PMI feedback (e.g., PMI wideband information field) and Q⁽²⁾And wideband PMI feedback. CSI part 2 of a CSI report may also further comprise: DI in case of being reported (e.g., DI broadband info field).

[ [ embodiment mode 2-2-2-1] ]

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

[ [ [ option 1] ] ]

Q⁽¹⁾And Q⁽²⁾Or may be set or indicated directly.

[ [ [ option 2] ] ]

Q and Q⁽¹⁾May also be set or indicated. Q⁽²⁾Can also be used as Q-Q⁽¹⁾And is obtained.

[ [ [ option 3] ] ]

Q may also be set or indicated. Q⁽¹⁾It is also available as floor (Q/2). Q⁽²⁾Can also be used as Q-Q⁽¹⁾And is obtained.

[ [ [ option 4] ] ]

Q and Δ Q may also be set or indicated. Q⁽¹⁾And Q⁽²⁾Can also be obtained as a function of Q and deltaq. For example, by Q⁽¹⁾＝floor((Q-ΔQ)/2)、Q⁽²⁾＝Q-Q⁽¹⁾Can be obtained by Q⁽¹⁾＝floor(Q/2)-ΔQ、Q⁽²⁾＝Q-Q⁽¹⁾And is obtained.

For example, in the case where option 2 is applied, as shown in fig. 14, CSI part 1 of CSI report # n may also include: number of multiple wideband PMI feedbacks Q, Q in CSI part 2 if reported⁽¹⁾An indicator of (1). As shown in fig. 15, CSI portion 2 of CSI report # n may include wideband reports #1 and # 2. Wideband report #1 may also include: wideband PMI feedback or codebook index in case of being reported and Q of DI in case of being reported⁽¹⁾And (4) grouping. Wideband report #2 may also include: wideband PMI feedback or codebook index in case of being reported and Q of DI in case of being reported⁽²⁾A (Q-Q)⁽¹⁾One) group.

[ [ embodiment modes 2-2-2-2] ]

In case that at least one CSI report is two parts, it may also be 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.

For CSI part 1, multiple CSI fields of all CSI reports #1, #2, … # n may also be mapped to a in the order from top to bottom of fig. 16, respectively⁽¹⁾ ₀，a⁽¹⁾ ₁，…a⁽¹⁾ _A(1)-1. Here, the CSI field of CSI report # n may be the example shown in fig. 7, 8, or 14. Or may be A⁽¹⁾N. For CSI part 2, the CSI fields of all CSI reports #1, #2, … # n may also be mapped to a in the order from top to bottom of fig. 17, respectively⁽²⁾ ₀、a⁽²⁾ ₁、…a⁽²⁾ _A(2)-1. Here, the CSI field of CSI report # n may be the example shown in fig. 15 described above. Or may be A⁽²⁾＝n。

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

[ [ embodiment modes 2-2-2-3] ]

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

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

Fig. 18 shows a case where CSI part 2 of the two-part CSI includes two wideband reports #1 and # 2. In the CSI part 2, wideband report #1 of all CSI reports and wideband report #2 of all CSI reports are mapped in order. Wideband report #1 of all CSI reports contains wideband report #1 (Q) of one CSI report⁽¹⁾A wideband PMI). Wideband report #2 of all CSI reports contains wideband report #2 of one CSI report (Q-Q)⁽¹⁾A wideband PMI).

If the output sequence length E after rate matching is used_totAnd a maximum code bit length E for a code rate that does not exceed the maximum PUCCH code rate_maxThe length of the output sequence combining HARQ-ACK, SR and CSI part 1 in case of using two-part CSI may also be min (E)_tot，E_max). The length of the output sequence based on CSI part 2 may also be E_tot-min(E_tot，E_max)。

According to this embodiment 2-2-2, compatibility can be maintained for CSI reports having two reported rel.15 NRs within the CSI portion 2 of one CSI report.

[ embodiments 2-2-3]

CSI part 2 of one CSI report may also contain q wideband reports. The Q broadband reports may also each contain Q⁽¹⁾，Q⁽²⁾，…，Q^(q)Individual wideband PMI feedback (e.g., PMI wideband information field). CSI part of one CSI report2 may further comprise: DI in case of being reported (e.g., DI broadband info field).

The 1 st Q may also be included in the wideband report #1 of CSI part 2 of CSI report # n⁽¹⁾A wideband PMI. The corresponding DI in case of being reported may also be further included in the wideband report #1 of CSI part 2 of CSI report # n.

Wideband report # q (q) at CSI portion 2 of CSI report # n>1) May also include the index Σ_l＝1 ^q-1Q^(l)+1，…，Σ_l＝1 ^qQ^(l)Q of^(q)And wideband PMI feedback. The corresponding DI in the case of being reported may also be further included in the wideband report # q of CSI part 2 of CSI report # n.

[ [ embodiment modes 2-2-3-1] ]

Q⁽¹⁾，Q⁽²⁾，…，Q^(q)The value of (c) may be set or indicated by at least one of RRC, MAC CE, and DCI, may be determined by the UE, and may be indicated (reported) by an indicator of the number of wideband PMI feedbacks in the CSI portion 1, or may be obtained by a combination thereof. Q may be represented by Q⁽¹⁾，Q⁽²⁾，…，Q^(q)Is implicitly obtained or indicated (reported) in an implicit way.

[ [ [ option 1] ] ]

Q⁽¹⁾，Q⁽²⁾，…，Q^(q)Or may be set or indicated directly.

[ [ [ option 2] ] ]

Q, Q may also be set or indicated⁽¹⁾，Q⁽²⁾，…，Q^(q-1)。Q^(q)Can also be used as Q-sigma_p＝1 ^q-1Q^(p)And is obtained.

[ [ [ option 3] ] ]

Q may also be set or indicated. For 1 ≦ p<Q of Q^(p)It is also available as floor (Q/Q). Q^(q)Can also be used as Q-sigma_p＝1 ^q-1Q^(p)And is obtained.

For example, in the case where option 1 is applied, as shown in fig. 19, CSI part 1 of CSI report # n may also include: number of wideband PMI feedbacks in case of being reported Q⁽¹⁾，Q⁽²⁾，…，Q^(q)An indicator of (1). Here, the number Q of wideband reports may also be by Q⁽¹⁾，Q⁽²⁾，…，Q^(q)Is indicated (reported) in an implicit way. CSI part 2 of CSI report # n may also contain wideband reports #1, #2, …, # q. As shown in fig. 20A, the broadband report #1 may include: wideband PMI feedback or codebook index in case of being reported and Q of DI in case of being reported⁽¹⁾And (4) grouping. As shown in fig. 20B, the wideband report # q may include: wideband PMI feedback or codebook index in case of being reported and Q of DI in case of being reported^(q)And (4) grouping.

[ [ embodiment modes 2-2-3-2] ]

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

For example, as shown in fig. 21, CSI part 1 of CSI report # n may include: number of wideband PMI feedbacks in case of being reported Q⁽¹⁾The indicator of (2) may also include: an indicator of the number of wideband reports q in case of being reported.

CSI part 2 of CSI report # n may also contain wideband reports #1, #2, …, # q. As shown in fig. 22, the broadband report #1 may include: wideband PMI feedback or codebook index in case of being reported and Q of DI in case of being reported⁽¹⁾The number Q of wideband PMI feedbacks for the next wideband report #2 in the case of being reported may be included in the group⁽²⁾An indicator of (1). As shown in fig. 23A, the wideband report # q-1 may include: wideband PMI feedback or codebook index in case of being reported and Q of DI in case of being reported^(q-1)The group may include a group to be reportedThe number Q of wideband PMI feedbacks of the following wideband report # Q^(q)An indicator of (1). As shown in fig. 23B, the wideband report # q may include: wideband PMI feedback or codebook index in case of being reported and Q of DI in case of being reported^(q)And (4) grouping.

[ [ embodiment modes 2-2-3-3] ]

In case that at least one CSI report is two parts, it may also be 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.

For CSI part 1, the CSI fields of all CSI reports #1, #2, … # n may also be mapped to a in the order from top to bottom of fig. 24, respectively⁽¹⁾ ₀，a⁽¹⁾ ₁，…a⁽¹⁾ _A(1)-1. Here, the CSI field of CSI report # n may be the example shown in fig. 7, 8, 19, or 21. Or may be A⁽¹⁾N. For CSI part 2, the CSI fields of all CSI reports #1, #2, … # n may also be mapped to a in the order from top to bottom of fig. 25, respectively⁽²⁾ ₀、a⁽²⁾ ₁、…a⁽²⁾ _A(2)-1. Here, the CSI field of CSI report # n may be the example shown in fig. 7 or fig. 8 or fig. 20A or fig. 20B or fig. 22 or fig. 23A or fig. 23B described above. Or may be A⁽²⁾＝n。

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

[ [ embodiment modes 2-2-3-4] ]

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

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

Fig. 26 shows a case where the CSI part 2 of the two-part CSI includes q wideband reports #1, #2, …, and # q. In the CSI part 2, a wideband report #1 of all CSI reports, wideband reports #2 of all CSI reports, … of all CSI reports, and a wideband report # q of all CSI reports are mapped in order. Wideband report #1 of all CSI reports contains wideband report #1 (Q) of one CSI report⁽¹⁾A wideband PMI). Wideband report # Q of all CSI reports comprises wideband report # Q of one CSI report (Q)^(q)A wideband PMI).

If the output sequence length E after rate matching is used_totAnd a maximum code bit length E for a code rate that does not exceed the maximum PUCCH code rate_maxThe length of the output sequence combining HARQ-ACK, SR and CSI part 1 in case of using two-part CSI may also be min (E)_tot，E_max). The length of the output sequence based on CSI part 2 may also be E_tot-min(E_tot，E_max)。

According to this embodiment 2-2-3, it is possible to improve the flexibility of feedback of a plurality of wideband PMIs and the flexibility of the order of mapping a plurality of CSI fields of one CSI report.

< embodiment 3> m CSI sections

In this embodiment, a case where one CSI report includes m CSI components will be described.

For multiple wideband PMI feedback, CSI bit generation in UCI with m partial CSI reports may also be defined.

EXAMPLE 3-1 CSI field of CSI portion 1

The multiple CSI fields of one CSI report in CSI part 1 may also include: indicator of number of CSI components m in case of being reported, being reportedAn indicator of the number of multiple wideband PMI feedbacks in m-1 CSI parts (e.g., CSI parts other than CSI part 1) in case of (1), and Q in case of being reported₀At least one of the wideband PMI feedbacks (e.g., PMI wideband information field). The multiple CSI fields of one CSI report in CSI part 1 may also further include: and Q in case of being reported₀A DI (e.g., DI wideband information field) corresponding to each of the wideband PMI feedbacks.

[ embodiment 3-1-1]

The multiple CSI fields of one CSI report in CSI part 1 may contain only: the indicator of the number of the plurality of wideband PMI feedbacks in each CSI component (for example, each CSI component other than CSI component 1) in the case of being reported may further include: an indicator of the number m of CSI parts in case of being reported.

[ embodiment 3-1-2]

The multiple CSI fields of one CSI report in CSI part 1 may also include: at least one of an indicator of the number of wideband PMI feedbacks in the case of being reported, an indicator of the number of multiple wideband PMI feedbacks in each CSI portion (e.g., each CSI portion other than CSI portion 1) in the case of being reported, and an indicator of the number of CSI portions m in the case of being reported. The multiple CSI fields of one CSI report in CSI part 1 may also further contain DI in case of being reported.

The number m of CSI parts may be informed (reported) implicitly or explicitly.

For example, as shown in fig. 27, CSI portion 1 of CSI report # n may include: PMI wideband information field information #0 in case of being reported, DI wideband information field information #0 in case of being reported, and the number Q of wideband PMI feedbacks in each of the remaining m-1 CSI parts (CSI part 2-CSI part m) in case of being reported⁽¹⁾、Q⁽²⁾、…、Q^(m-1)An indicator of (1).

In this case, the number m of CSI portions may also pass Q⁽¹⁾、Q⁽²⁾、…、Q^(m-1)Number ofThe quantity m-1 is implicitly signaled (reported). Further, it is also possible to use a case where the CSI part 1 of the CSI report # n includes an indicator of the number m of CSI parts, whereby the number m of CSI parts can also be explicitly notified (reported).

For one wideband PMI feedback, CSI bit generation within UCI in embodiment 1 may also be applied.

[ embodiments 3-1 to 3]

The multiple CSI fields of one CSI report in CSI part 1 may also include: q in case of being reported₀At least one of an indicator of a number of wideband PMI feedbacks in each CSI portion (e.g., each CSI portion other than CSI portion 1) in case of being reported, and an indicator of a number m of CSI portions in case of being reported. The multiple CSI fields of one CSI report in CSI part 1 may also further include: DI in case of being reported.

Q₀The setting or determination of (2) may be performed in accordance with at least one of embodiment 1-1-2 and embodiments 1-1-2-1 to 1-1-2-3.

In embodiment 3-1, the indicator of the number of multiple wideband PMI feedbacks for m-1 CSI components may also depend on the design of CSI component m defined in embodiment 3-2 described later.

EXAMPLE 3-2 CSI field of CSI portion m

The multiple CSI fields of one CSI report in CSI part m may also include: q in case of being reported^(m)At least one of a number of wideband PMI feedbacks (e.g., PMI wideband information fields), and an indicator related to the number of wideband PMI feedbacks. The CSI fields of one CSI report in the CSI component m may also further include: DI in case of being reported (e.g., DI broadband info field).

The CSI portion m may also have 1 or more wideband reports in the CSI portion 2 described in embodiment 2-2. In other words, a configuration in which the CSI part 2 of embodiment 2-2 is replaced with the CSI part m may also be applied to the CSI part m of embodiment 3-2.

For example, in the CSI reportThe CSI portion m of the report # n may include the index Σ_l＝1 ^m-1Q^(l)+1，…，Σ_l＝1 ^mQ^(l)Q of^(m)And wideband PMI feedback. The CSI report # n may further include, in the CSI part m: the corresponding DI in the case of being reported.

[ embodiment 3-2-1]

Number of wideband PMI feedbacks Q in CSI sections other than CSI section 1⁽²⁾，…，Q^(m)The value of (c) may be set or indicated by at least one of RRC, MAC CE, and DCI, may be determined by the UE, and may be indicated (reported) by an indicator of the number of wideband PMI feedbacks in the CSI portion 1, or may be obtained by a combination thereof. m can be represented by Q⁽²⁾，…，Q^(m)Is implicitly obtained or indicated (reported) in an implicit way.

[ [ [ option 1] ] ]

Q⁽²⁾、…、Q^(m)Or may be set or indicated directly.

[ [ [ option 2] ] ]

May also be set or indicated Q, Q⁽²⁾、…、Q^(m-1)。Q^(m)Can also be used as Q-sigma_p＝2 ^m-1Q^(p)And is obtained.

[ [ [ option 3] ] ]

Q may also be set or indicated. For 1 ≦ p<Q of m^(p)It is also available as floor (Q/(m-1)). Q^(m)Can also be used as Q-sigma_p＝2 ^m-1Q^(p)And is obtained.

For example, in the case of m (m)>2) When the individual CSI component is applied to option 1 of embodiment 3-1-1 and embodiment 3-2-1, as shown in fig. 28, CSI component 1 of CSI report # n may include: number of wideband PMI feedbacks Q in each of the remaining m-1 CSI parts (CSI-part 2-CSI-part m) in case of being reported⁽¹⁾、Q⁽²⁾、…、Q^(m-1)An indicator of (1). Here, the number m of CSI components may also be by Q⁽¹⁾、Q⁽²⁾、…、Q^(m-1)The number m-1 is indicated (reported) in an implicit way. As shown in fig. 29A, CSI portion 2 of CSI report # n may also include: wideband PMI feedback or codebook index in case of reported and Q of DI in case of reported⁽¹⁾And (4) grouping. At m>In case 2, as shown in fig. 29B, the CSI component m of CSI report # n may include: wideband PMI feedback or codebook index in case of reported and Q of DI in case of reported^(m-1)And (4) grouping.

[ embodiment 3-2-2]

Q^(m)May also be decided by the UE and indicated (reported) by an indicator of the number of wideband PMI feedbacks within CSI part m-1. The number m of CSI components may be explicitly set or indicated by RRC and at least one of 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 component 1.

For example, as shown in fig. 30, CSI portion 1 of CSI report # n may include: number of wideband PMI feedbacks in the next CSI part (CSI part 2) in case of being reported Q⁽¹⁾And an indicator of the number m of CSI parts in case of being reported.

When m is larger than 3, as shown in fig. 31, CSI portion 2 of CSI report # n may include: wideband PMI feedback or codebook index in case of reported and Q of DI in case of reported⁽¹⁾Group, and number of wideband PMI feedbacks in the next CSI part (CSI part 3) if reported Q⁽²⁾An indicator of (1). As shown in FIG. 32A, CSI component m-1 (m) of CSI report # n>3) May also include: wideband PMI feedback or codebook index in case of reported and Q of DI in case of reported^(m-2)Group, and number of wideband PMI feedbacks in the next CSI part (CSI part m) if reported Q^(m-1)An indicator of (1). As shown in fig. 32B, CSI part m (m) of CSI report # n>2) May also include: wideband PMI feedback or codebook index in case of reported and Q of DI in case of reported^{(m -1)}And (4) grouping.

In the case of using three-part CSI, as in the case of fig. 31, CSI part 2 of CSI report # n may include: wideband PMI feedback or codebook index in case of reported and Q of DI in case of reported⁽¹⁾Group, and number of wideband PMI feedbacks in the next CSI part (CSI part 3) if reported Q⁽²⁾An indicator of (1). As shown in fig. 33, CSI component 3 of CSI report # n may also include, for l ═ 2, 3, …, m-1: wideband PMI feedback or codebook index in case of reported and Q of DI in case of reported^(l)And (4) grouping. Here, m may be an arbitrary integer larger than 1, not the CSI portion number. CSI part 3 of CSI report # n at Q^(l-1)Group and Q^(l)Among the groups, it may also include: number of following wideband PMI feedbacks in case of being reported Q^(l)An indicator of (1).

Embodiment 3-3 UCI bit sequence Generation

In the case that at least one CSI report is m parts, m UCI bit sequences a may also be⁽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.

For CSI part 1, the CSI fields of all CSI reports #1, #2, … # n may also be mapped to a in the order from top to bottom of fig. 34A, respectively⁽¹⁾ ₀，a⁽¹⁾ ₁，…a⁽¹⁾ _A(1)-1. Here, the CSI field of CSI report # n may be the example shown in fig. 7, 8, 28, or 30. Or may be A⁽¹⁾N. For CSI part m, multiple CSI fields of all CSI reports #1, #2, … # n may also be mapped to a in the order from top to bottom of fig. 34B, respectively^(m) ₀，a^(m) ₁，…a^(m) _A(m)-1. Here, the CSI field of CSI report # n may be the example shown in fig. 23A or 23B or 31 or 32A or 32B described above. Or may be A^(m)＝n。

Alternatively, if CSI report # n is not two parts, the plurality of CSI fields in CSI part 1 may be CSI report # n (for example, embodiments 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 (e.g., embodiments 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 (e.g., embodiments 3-2-1 or 3-2-2).

Embodiments 3-4 encoding/Rate matching

The m UCI bit sequences CSI part 1, CSI part 2, …, CSI part m may also be encoded independently. In case the actual coding rate is higher than the maximum coding rate, it may also be discarded in descending order of CSI parts (CSI part m is discarded first, then CSI part m-1 is discarded, then CSI part m-2 is discarded, …) until the coding rate meets the requirements of the maximum coding rate.

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

Fig. 35 shows an example of m-part CSI. CSI parts 1, 2, …, m are independently coded. CSI parts 1, 2, …, m are mapped in turn. CSI part 2 of one CSI report contains Q⁽¹⁾A wideband PMI. CSI part m of one CSI report contains Q^(m-1)A wideband PMI.

If the output sequence length E after rate matching is used_totAnd a maximum code bit length E for a code rate that does not exceed the maximum PUCCH code rate_maxThe length of the output sequence combining HARQ-ACK and SR with CSI part 1 in case of using two-part CSI may also be min (E)_tot，E_max). The output sequence length based on CSI portions other than CSI portion 1 (e.g., CSI portions 2 to m) may beIs E_tot-min(E_tot，E_max)。

According to embodiment 3, a plurality of wideband PMIs are independently encoded in a plurality of CSI sections, thereby enabling improvement in reliability.

< embodiment 4> method for determining number of CSI components

In this embodiment, a method of determining or setting one or more CSI components of one CSI report will be described.

EXAMPLE 4-1

In the system using embodiment 1 (1-part CSI) and embodiment 2 (2-part CSI), which one of one part and two parts is included in one CSI report may be explicitly set or indicated by at least one of RRC, MAC CE, and DCI, may be implicitly set or indicated by at least one of RRC, MAC CE, and DCI, or may be determined by the UE and reported to the base station in UCI.

EXAMPLE 4-2

In the system using embodiment 1 (1-part CSI) and embodiment 3 (m-part CSI), which one CSI report includes one part or m parts may be explicitly set or indicated by at least one of RRC, MAC CE, and DCI, may be implicitly set or indicated by at least one of RRC, MAC CE, and DCI, or may be determined by the UE and reported to the base station in UCI.

When m is 2 or more, the combinations of embodiments 1, 2, and 3 are included. That is, this system may be a system using embodiment 1 (1-part CSI), embodiment 2 (2-part CSI), and embodiment 3 (m-part CSI).

EXAMPLE 4-3

In the system using embodiment 2 (2-part CSI) and embodiment 3 (m-part CSI), which of two parts and m parts is included in one CSI report may be explicitly set or indicated by at least one of RRC, MAC CE, and DCI, may be implicitly set or indicated by at least one of RRC, MAC CE, and DCI, or may be determined by the UE and reported to the base station in UCI.

(others)

In various embodiments, each piece of DI wideband information may be mapped to a corresponding piece of PMI wideband information. For example, in CSI report #1, wideband DI information field #1 may be mapped after the corresponding wideband PMI information field # 1.

In the case where the PMI field #1 is located within the CSI portion 2, the DI field #1 may also be located within the CSI portion 2. In the case where the PMI field #1 is located within the CSI portion 1, the DI field #1 may also be located within the CSI portion 1.

When only the wideband PMI is normally received by the base station without the corresponding DI, there is a possibility that the CSI cannot be correctly reconstructed. By mapping each piece of DI wideband information to the corresponding PMI wideband information, the same priority as that of the wideband PMI can be given to DI, and the DI wideband information can be used together with the wideband PMI.

(Wireless communication System)

Hereinafter, a configuration of a radio communication system according to an embodiment of the present disclosure will be described. In this radio communication system, communication is performed using one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.

Fig. 36 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), New wireless (5th Generation mobile communication system New Radio (5G NR)) of the fifth Generation mobile communication system, or the like.

In addition, the wireless communication system 1 may also support Dual Connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). The MR-DC may include Dual connection of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC))), Dual connection of NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC))), and the like.

In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Slave Node (SN). In NE-DC, the base station of NR (gNB) is MN and the base station of LTE (E-UTRA) (eNB) is SN.

The wireless communication system 1 may also support Dual connection between a plurality of base stations within the same RAT (for example, Dual connection of a base station (gNB) in which both MN and SN are NR (NR-NR Dual Connectivity (NN-DC)))).

The wireless communication system 1 may include: a base station 11 forming a macro cell C1 having a relatively wide coverage area, and base stations 12(12a to 12C) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The arrangement, number, and the like of each cell and user terminal 20 are not limited to the embodiments shown in the figures. Hereinafter, base stations 11 and 12 will be collectively referred to as base station 10 without distinction.

The user terminal 20 may also 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) and Dual Connectivity (DC) using a plurality of Component Carriers (CCs)).

Each CC may be included in at least one of the first Frequency band (Frequency Range 1(FR1))) and the second Frequency band (Frequency Range 2(FR 2))). Macro cell C1 may also be contained in FR1 and small cell C2 may also be contained in FR 2. For example, FR1 may be a frequency band of 6GHz or less (less than 6GHz (sub-6GHz)), and FR2 may be a frequency band higher than 24GHz (above-24 GHz)). The frequency bands, definitions, and the like of FR1 and FR2 are not limited to these, and FR1 may correspond to a higher frequency band than FR2, for example.

The user terminal 20 may perform communication in each CC by using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

The plurality of base stations 10 may also be connected by wire (e.g., optical fiber based Common Public Radio Interface (CPRI)), X2 Interface, or the like) or wirelessly (e.g., NR communication). For example, when NR communication is used as a Backhaul between base stations 11 and 12, base station 11 corresponding to an upper station may be referred to as an Integrated Access Backhaul (IAB) donor (donor) and base station 12 corresponding to a relay (relay) may be referred to as an IAB node.

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 include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN)), a Next Generation Core (NGC), and the like.

The user terminal 20 may be a terminal supporting at least one of communication schemes such as LTE, LTE-a, and 5G.

The radio communication system 1 may use a radio access scheme based on Orthogonal Frequency Division Multiplexing (OFDM). 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), or the like may be used.

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

In the radio communication system 1, as the Downlink Channel, a Downlink Shared Channel (Physical Downlink Shared Channel (PDSCH))), a Broadcast Channel (Physical Broadcast Channel (PBCH))), a Downlink Control Channel (Physical Downlink Control Channel (PDCCH))) and the like that are Shared by the user terminals 20 may be used.

In the radio communication system 1, as the Uplink Channel, an Uplink Shared Channel (Physical Uplink Shared Channel (PUSCH))), an Uplink Control Channel (Physical Uplink Control Channel (PUCCH))), a Random Access Channel (Physical Random Access Channel (PRACH)), and the like, which are Shared by the user terminals 20, may be used.

User data, higher layer control Information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, etc. may also be transmitted over the PUSCH. In addition, a Master Information Block (MIB)) may also be transmitted through the PBCH.

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

The DCI scheduling PDSCH may be referred to as DL assignment, DL DCI, or the like, and the DCI scheduling PUSCH may be referred to as UL grant, UL DCI, or the like. In addition, the PDSCH may be replaced with DL data and the PUSCH may be replaced with UL data.

For PDCCH detection, a COntrol REsource SET (countrol REsource SET (CORESET)) and a search space (search space) may be used. CORESET corresponds to searching for DCI resources. The search space corresponds to a search region and a search method of PDCCH candidates (PDCCH candidates). 1 CORESET may also be associated with 1 or more search spaces. The UE may also monitor the CORESET associated with a certain search space based on the search space settings.

One search space may also correspond to PDCCH candidates corresponding to 1 or more aggregation levels (aggregation levels). The 1 or more search spaces may also be referred to as a set of search spaces. In addition, "search space", "search space set", "search space setting", "search space set setting", "CORESET setting", and the like of the present disclosure may be replaced with each other.

Uplink Control Information (UCI)) including at least one of Channel State Information (CSI), ACKnowledgement Information (for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)), ACK/NACK, and Scheduling ReQuest (SR)) may be transmitted through the PUCCH. A random access preamble for establishing a connection with a cell may also be transmitted through the PRACH.

In addition, in the present disclosure, a downlink, an uplink, and the like may also be expressed without "link". Further, it can be said that "Physical (Physical)" is not attached to the head of each channel.

In the wireless communication system 1, a Synchronization Signal (SS), a Downlink Reference Signal (DL-RS), and the like may be transmitted. In the wireless communication system 1, the DL-RS may be a Cell-specific Reference Signal (CRS), a Channel State Information Reference Signal (CSI-RS), a DeModulation Reference Signal (DMRS), a Positioning Reference Signal (PRS), a Phase Tracking Reference Signal (PTRS), or the like.

The Synchronization Signal may be at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), for example. The signal blocks containing SS (PSS, SSs) and PBCH (and DMRS for PBCH) may also be referred to as SS/PBCH blocks, SS blocks (SSB), and the like. In addition, SS, SSB, etc. may also be referred to as reference signals.

In addition, in the wireless communication system 1, as an Uplink Reference Signal (UL-RS), a measurement Reference Signal (Sounding Reference Signal (SRS)), a demodulation Reference Signal (DMRS), or the like may be transmitted. The DMRS may also be referred to as a user terminal specific Reference Signal (UE-specific Reference Signal).

(base station)

Fig. 37 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting/receiving unit 120, a transmitting/receiving antenna 130, and a transmission line interface (transmission line interface) 140. The control unit 110, the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission line interface 140 may be provided in one or more numbers.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and the base station 10 can be assumed to have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 110 may also control generation of signals, scheduling (e.g., resource allocation, mapping), and the like. The control unit 110 may control transmission and reception, measurement, and the like using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. Control section 110 may generate data, control information, sequence (sequence), and the like to be transmitted as a signal, and forward the generated data, control information, sequence, and the like to transmission/reception section 120. The control unit 110 may perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of radio resources, and the like.

The transceiver 120 may also include a baseband (baseband) unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission/reception section 120 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmission/reception circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission unit may be constituted by the transmission processing unit 1211 and the RF unit 122. The receiving unit may be configured by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

The transmitting/receiving antenna 130 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission/reception unit 120 may receive the uplink channel, the uplink reference signal, and the like.

Transmit/receive section 120 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, with respect to Data, Control information, and the like acquired from Control section 110, transmission/reception section 120 (transmission processing section 1211) may perform processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (e.g., RLC retransmission Control), processing of a Medium Access Control (MAC) layer (e.g., HARQ retransmission Control), and the like, and generate a bit string to be transmitted.

Transmission/reception section 120 (transmission processing section 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

The transmission/reception unit 120(RF unit 122) may perform modulation, filter processing, amplification, and the like for a baseband signal in a radio frequency band, and transmit a signal in the radio frequency band via the transmission/reception antenna 130.

On the other hand, the transmission/reception unit 120(RF unit 122) may perform amplification, filter processing, demodulation to a baseband signal, and the like on a signal of a radio frequency band received by the transmission/reception antenna 130.

Transmission/reception section 120 (reception processing section 1212) may acquire user data and the like by applying, to the acquired baseband signal, reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filter processing, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing.

The transmission/reception unit 120 (measurement unit 123) may also perform measurement related to the received signal. For example, measurement section 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, and the like based on the received signal. Measurement section 123 may perform measurement of Received Power (e.g., Reference Signal Received Power (RSRP)), Received Quality (e.g., Reference Signal Received Quality (RSRQ)), Signal to Interference plus Noise Ratio (SINR)), Signal to Noise Ratio (SNR)), Signal Strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 110.

The transmission path interface 140 may transmit and receive signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, and the like, or may acquire and transmit user data (user plane data) and control plane data and the like for the user terminal 20.

The transmitting unit and the receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140.

(user terminal)

Fig. 38 is a diagram showing an example of the 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. Further, the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided with one or more antennas.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 210 may also control the generation, mapping, etc. of the signals. Control section 210 may control transmission/reception, measurement, and the like using transmission/reception section 220 and transmission/reception antenna 230. Control section 210 may generate data, control information, a sequence, and the like to be transmitted as a signal, and forward the generated data, control information, sequence, and the like to transmission/reception section 220.

The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmitting/receiving section 220 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission section may be constituted by the transmission processing section 2211 and the RF section 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmission/reception antenna 230 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 220 may receive the downlink channel, the synchronization signal, the downlink reference signal, and the like. The transmission/reception unit 220 may transmit the uplink channel, the uplink reference signal, and the like described above.

Transmit/receive section 220 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, transmission/reception section 220 (transmission processing section 2211) may perform processing in the PDCP layer, processing in the RLC layer (for example, RLC retransmission control), processing in the MAC layer (for example, HARQ retransmission control), and the like on data, control information, and the like acquired from control section 210, and generate a bit sequence to be transmitted.

Transmission/reception section 220 (transmission processing section 2211) may perform transmission processing such as channel coding (including error correction coding as well), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

Whether or not DFT processing is applied may be set based on transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is active (enabled), transmission/reception section 220 (transmission processing section 2211) may perform DFT processing as the transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, or otherwise, transmission/reception section 220 (transmission processing section 2211) may not perform DFT processing as the transmission processing.

The transmission/reception section 220(RF section 222) may perform modulation, filtering, amplification, and the like for a baseband signal in a radio frequency band, and transmit a signal in the radio frequency band via the transmission/reception antenna 230.

On the other hand, the transmission/reception section 220(RF section 222) may perform amplification, filter processing, demodulation to a baseband signal, and the like on a signal in a radio frequency band received by the transmission/reception antenna 230.

Transmission/reception section 220 (reception processing section 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (including error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data.

The transceiver unit 220 (measurement unit 223) may also perform measurements related to the received signal. For example, the measurement unit 223 may also perform RRM measurement, CSI measurement, and the like based on the received signal. Measurement unit 223 may also measure for received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 210.

The transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving antenna 230 and the transmission path interface 240 of the transmitting/receiving unit 220.

Control section 210 may also generate a CSI report that is a channel state information report including a first field (for example, PMI wideband information field) indicating each of a plurality of Precoding Matrix Indicators (PMIs) and a second field (for example, DI wideband information field) indicating a delay corresponding to the PMIs. Transmission/reception section 220 may transmit the CSI report (embodiment 1).

The CSI report may also contain a plurality of groups of the first field and the second field.

Control unit 210 may also map the second field to be subsequent to the first field in the CSI report.

The first field may also represent PMI wideband information.

The second field may also represent an index of the delay corresponding to the PMI wideband information.

Control section 210 may generate a plurality of CSI portions that are a plurality of channel state information portions, wherein at least one CSI portion of the plurality of CSI portions includes a first field indicating each of a plurality of Precoding Matrix Indicators (PMIs) and a second field indicating a delay corresponding to the PMIs. Transmission/reception section 220 may transmit the CSI components (embodiments 2 and 3).

The at least one CSI part may also contain a plurality of groups of the first field and the second field.

Control unit 210 may also map the second field to be subsequent to the first field in the at least one CSI part.

The first field may also represent PMI wideband information.

The second field may also represent an index of the delay corresponding to the PMI wideband information.

(hardware construction)

The block diagram used in the description of the above embodiment shows blocks in functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. The method of implementing each functional block is not particularly limited. That is, each functional block may be implemented by one apparatus that is physically or logically combined, or may be implemented by a plurality of apparatuses that are directly or indirectly (for example, by wire or wireless) connected to two or more apparatuses that are physically or logically separated. The functional blocks may also be implemented by combining the above-described apparatus or apparatuses with software.

Here, the functions include judgment, determination, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notification), communication (communicating), forwarding (forwarding), configuration (setting), reconfiguration (resetting), allocation (allocating, mapping), assignment (assigning), and the like, but are not limited to these. For example, a function block (a configuration unit) that realizes a transmission function may also be referred to as a transmission unit (transmitting unit), a transmitter (transmitter), or the like. Any of these methods is not particularly limited, as described above.

For example, the base station, the user terminal, and the like 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 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. The base station 10 and the user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In addition, in the present disclosure, terms such as device, circuit, apparatus, section (section), unit, and the like can be substituted for each other. The hardware configurations of the base station 10 and the user terminal 20 may include one or more of the respective devices shown in the drawings, or may not include some of the devices.

For example, only one processor 1001 is illustrated, but there may be multiple processors. The processing may be executed by one processor, or may be executed by two or more processors simultaneously, sequentially, or by another method. Further, the processor 1001 may be implemented by one or more chips.

Each function of the base station 10 and the user terminal 20 is realized by, for example, reading specific software (program) into hardware such as the processor 1001 and the memory 1002, performing an operation by the processor 1001 to control communication via the communication device 1004, or controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a Central Processing Unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, at least a part of the control unit 110(210), the transmitting and receiving unit 120(220), and the like may be implemented by the processor 1001.

Further, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110(210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be similarly realized for other functional blocks.

The Memory 1002 may be a computer-readable recording medium, and may be formed of at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM)), a Random Access Memory (RAM), or another suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory (primary storage), or the like. The memory 1002 can store a program (program code), a software module, and the like that are executable to implement the wireless communication method according to one embodiment of the present disclosure.

The storage 1003 may be a computer-readable recording medium, and may be, for example, at least one of a flexible disk (flexible Disc), a Floppy (registered trademark) disk, an optical disk (e.g., a Compact Disc read only memory (CD-ROM)) or the like), a digital versatile Disc (dvd), a Blu-ray (registered trademark) disk, a removable disk (removable Disc), a hard disk drive, a smart card (smart card), a flash memory device (e.g., a card (card), a stick (stick), a key drive), a magnetic stripe (stripe), a database, a server, or another suitable storage medium.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. Communication apparatus 1004 may be configured to include a high-Frequency switch, a duplexer, a filter, a Frequency synthesizer, and the like, in order to realize at least one of Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD), for example. For example, the transmitting/receiving unit 120(220), the transmitting/receiving antenna 130(230), and the like described above may be implemented by the communication device 1004. The transmitting/receiving unit 120(220) may be physically or logically separately installed from the transmitting unit 120a (220a) and the receiving unit 120b (220 b).

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, or the like) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Further, the processor 1001, the memory 1002, and other devices are connected by a bus 1007 for communicating information. The bus 1007 may be formed by a single bus, or may be formed by different buses between the respective devices.

The base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), or the like, and a part or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may also be installed with at least one of these hardware.

(modification example)

In addition, terms described in the present disclosure and terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols, and signals (signals or signaling) may be substituted for one another. Further, the signal may also be a message. The Reference Signal (Reference Signal) may also be referred to as RS for short, and may also be referred to as Pilot (Pilot), Pilot Signal, etc. depending on the applied standard. Further, Component Carriers (CCs) may also be referred to as cells, frequency carriers, Carrier frequencies, and the like.

A radio frame may also be made up of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more slots in the time domain. The subframe may also be a fixed time length (e.g., 1ms) independent of a parameter set (numerology).

Here, the parameter set may also refer to a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the parameter set may indicate at least one of SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the Time domain, and the like.

The time slot may be formed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, or the like) in the time domain. Further, the time slot may also be a time unit based on a parameter set.

A timeslot may also contain multiple mini-slots. Each mini-slot may also be made up 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 made up of a fewer number of symbols than a slot. PDSCH (or PUSCH) transmitted in a time unit larger than a mini slot may also be referred to as PDSCH (PUSCH) mapping type a. PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

The radio frame, subframe, slot, mini-slot, and symbol all represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot, and symbol may also use other names corresponding to each. In addition, time units such as frames, subframes, slots, mini-slots, symbols, etc. in the present disclosure may be replaced with one another.

For example, one subframe may also be referred to as TTI, a plurality of consecutive subframes may also be referred to as TTI, and one slot or one mini-slot may also be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in the conventional LTE, may be a period shorter than 1ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms. The unit indicating TTI may be referred to as a slot, a mini slot, or the like, instead of a subframe.

Here, the TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (such as a frequency bandwidth and transmission power usable by each user terminal) to each user terminal in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), code block, code word, or the like, or may be a processing unit of scheduling, link adaptation, or the like. In addition, when a TTI is given, a time interval (e.g., the number of symbols) to which a transport block, a code block, a codeword, or the like is actually mapped may be shorter than the TTI.

When one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. The number of slots (the number of mini-slots) constituting the minimum time unit of the schedule may be controlled.

The TTI having a time length of 1ms 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 slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1ms, and a short TTI (e.g., a shortened TTI, etc.) may be replaced with a TTI having a TTI length smaller than that of the long TTI and equal to or longer than 1 ms.

A Resource Block (RB) is a Resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, and may be 12, for example. The number of subcarriers included in the RB may also be decided based on the parameter set.

In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, and the like may be formed of one or more resource blocks.

In addition, one or more RBs may also be referred to as a Physical Resource Block (PRB), a subcarrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, and the like.

Furthermore, a Resource block may also be composed of one or more Resource Elements (REs). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

The Bandwidth Part (BWP) (which may be referred to as a partial Bandwidth) may also indicate a subset of consecutive common RBs (common resource blocks) for a certain parameter set in a certain carrier. Here, the common RB may also be determined by an index of an RB with reference to a common reference point of the carrier. PRBs may also be defined in a certain BWP and are numbered additionally within the BWP.

The BWP may include UL BWP (UL BWP) and DL BWP (DL BWP). One or more BWPs may also be set within 1 carrier for the UE.

At least one of the set BWPs may be active, and the UE may not expect to transmit and receive a specific signal/channel other than the active BWP. In addition, "cell", "carrier", and the like in the present disclosure may also be replaced with "BWP".

The above-described configurations of radio frames, subframes, slots, mini slots, symbols, and the like are merely examples. For example, the structure of the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, and the like can be variously changed.

The information, parameters, and the like described in the present disclosure may be expressed as absolute values, relative values to specific values, or other corresponding information. For example, the radio resource may also be indicated by a specific index.

In the present disclosure, the names used for the parameters and the like are not limitative names in all aspects. Further, the mathematical expressions and the like 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 thus the various names assigned to these various channels and information elements are not limitative names in all aspects.

Information, signals, and the like described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

Information, signals, and the like can be output to at least one of a higher layer (upper layer) to a lower layer (lower layer) and a lower layer to a higher layer. Information, signals, and the like may be input and output via a plurality of network nodes.

The input/output information, signals, and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. The input/output information, signals, and the like may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be transmitted to other devices.

The information notification is not limited to the embodiment and embodiment described in the present disclosure, and may be performed by other methods. For example, the Information notification in the present disclosure may be implemented by physical layer signaling (e.g., Downlink Control Information (DCI)), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast Information (Master Information Block (MIB)), System Information Block (SIB)), or the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

The physical Layer signaling may also be referred to as Layer 1/Layer 2(L1/L2)) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup (RRC Connection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, or the like. The MAC signaling may be notified using a MAC Control Element (CE), for example.

Note that the notification of the specific information (for example, the notification of "X") is not limited to an explicit notification, and may be performed implicitly (for example, by not performing the notification of the specific information or by performing the notification of other information).

The decision may be made by a value (0 or 1) represented by one bit, by a true-false value (boolean) represented by true (true) or false (false), or by a comparison of values (e.g., with a specific value).

Software, whether referred to as software (software), firmware (firmware), middleware-ware (middle-ware), microcode (micro-code), hardware description language, or by other names, should be broadly construed to mean instructions, instruction sets, code (code), code segments (code segments), program code (program code), programs (program), subroutines (sub-program), software modules (software module), applications (application), software applications (software application), software packages (software packages), routines (routine), subroutines (sub-routine), objects (object), executables, threads of execution, processes, functions, or the like.

Software, instructions, information, and the like may also be transmitted or received via a transmission medium. For example, where the software is transmitted from a website, server, or other remote source (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 and wireless technologies is included within the definition of transmission medium.

The terms "system" and "network" as used in this disclosure can be used interchangeably. "network" may also mean a device (e.g., a base station) included in a network.

In the present disclosure, terms such as "precoding", "precoder", "weight", "Quasi-Co-location (qcl)", "Transmission Configuration Indication state (TCI state)", "spatial relationship (spatial relationship)", "spatial filter (spatial domain filter)", "Transmission power", "phase rotation", "antenna port group", "layer", "rank", "resource set", "resource group", "beam width", "beam angle", "antenna element", "panel", and the like can be used interchangeably.

In the present disclosure, terms such as "Base Station (BS)", "wireless Base Station", "fixed Station (fixed Station)", "NodeB", "enb (enodeb)", "gnb (gtnodeb)", "access point (access point)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where a base station is referred to by terms such as macrocell, smallcell, femtocell, picocell, and the like.

The base station can accommodate one or more (e.g., three) cells. When a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a portion or the entirety of the coverage area of at least one of a base station and a base station subsystem that is in communication service within the coverage area.

In the present disclosure, terms such as "Mobile Station (MS)", "User terminal (User terminal)", "User Equipment (UE)))," terminal "and the like can be used interchangeably.

In some instances, a mobile station is also referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset (hand set), user agent, mobile client, or some other suitable terminology.

At least one of the base station and the mobile station may also be referred to as a transmitting apparatus, a receiving apparatus, a wireless communication apparatus, and the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, a mobile body main body, or the like. The mobile body may be a vehicle (e.g., a vehicle, an airplane, etc.), may be a mobile body that moves in an unmanned manner (e.g., a drone (a drone), an autonomous vehicle, etc.), or may be a robot (manned or unmanned). At least one of the base station and the mobile station further 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 be an Internet of Things (IoT) device such as a sensor.

In addition, the base station in the present disclosure may also be replaced with a user terminal. For example, the various aspects/embodiments of the present disclosure may also be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (e.g., may also be referred to as Device-to-Device (D2D)), Vehicle networking (V2X), etc.). In this case, the user terminal 20 may have the functions of the base station 10 described above. The expressions such as "uplink" and "downlink" may be replaced with expressions (for example, "side") corresponding to inter-terminal communication. For example, the uplink channel, the downlink channel, and the like may be replaced with the side channel.

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

In the present disclosure, it is assumed that the operation performed by the base station is also performed by an upper node (upper node) thereof depending on the case. Obviously, in a network including one or more network nodes (network nodes) having a base station, various operations performed for communication with a terminal may be performed by the 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), and the like, but not limited thereto), or a combination thereof.

The embodiments and modes described in the present disclosure may be used alone, may be used in combination, or may be switched to use with execution. Note that, in the embodiments and the embodiments described in the present disclosure, the order of the processes, sequences, flowcharts, and the like may be changed as long as they are not contradictory. For example, elements of various steps are presented in an exemplary order for a method described in the present disclosure, but the present invention is not limited to the specific order presented.

The aspects/embodiments 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, fourth generation Mobile communication System (4 generation communication System (4G)), fifth generation Mobile communication System (5G)), Future Radio Access (FRA), New Radio Access Technology (RAT)), New Radio (New Radio trademark (NR)), New Radio Access (NX)), New Radio Access (Future Radio Access), FX), Global Broadband communication System (Global System for Mobile communication (GSM)), and Mobile Broadband communication System (CDMA) (2000 Mobile communication System)), (CDMA, etc.) IEEE 802.11(Wi-Fi (registered trademark)), IEEE 802.16(WiMAX (registered trademark)), IEEE 802.20, Ultra-wideband (uwb), Bluetooth (registered trademark), a system using another appropriate wireless communication method, a next generation system expanded based on these, and the like. Furthermore, multiple systems may also be applied in combination (e.g., LTE or LTE-a, combination with 5G, etc.).

The term "based on" used in the present disclosure does not mean "based only" unless otherwise specified. In other words, the expression "based on" means both "based only on" and "based at least on".

Any reference to the use of the terms "first," "second," etc. in this disclosure does not fully define the amount or order of such elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to first and second elements does not imply that only two elements may be used or that the first element must somehow override the second element.

The term "determining" used in the present disclosure includes various operations in some cases. For example, "determination (decision)" may be regarded as a case where "determination (decision)" is performed on determination (rounding), calculation (calculating), processing (processing), derivation (deriving), investigation (investigating), search (looking up), search, inquiry (query)) (for example, search in a table, a database, or another data structure), confirmation (authenticating), and the like.

The "determination (decision)" may be regarded as a case of "determining (deciding)" on reception (e.g., reception information), transmission (e.g., transmission information), input (input), output (output), access (e.g., access to data in a memory), and the like.

The "determination (decision)" may be also regarded as a case of performing "determination (decision)" on solution (resolving), selection (selecting), selection (breathing), establishment (evaluating), comparison (comparing), and the like. That is, the "judgment (decision)" may also be regarded as a case where the "judgment (decision)" is made for some operations.

The "determination (decision)" may be replaced with "assumption", "expectation", "consideration", and the like.

The "maximum transmission power" described in the present disclosure may indicate a maximum value of transmission power, may indicate a nominal maximum transmission power (the nominal UE maximum transmission power), and may indicate a nominal maximum transmission power (the rated UE maximum transmission power).

The terms "connected" and "coupled" or any variation thereof used in the present disclosure mean all connections or couplings between two or more elements directly or indirectly, and can include a case where one or more intermediate elements exist between two elements "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination of these. For example, "connect" may also be replaced with "access".

In the present disclosure, where two elements are connected, it can be considered to be "connected" or "joined" to each other using more than one wire, cable, printed electrical connection, etc., and using electromagnetic energy having a wavelength in the radio frequency domain, the microwave region, the optical (both visible and invisible) region, etc., as several non-limiting and non-inclusive examples.

In the present disclosure, the term "a is different from B" may 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", "associated", and the like may likewise be construed as "different".

In the present disclosure, when the terms "including", and "variations thereof are used, these terms are intended to have inclusive meanings as in the term" comprising ". Further, the term "or" used in the present disclosure does not mean exclusive or.

In the present disclosure, for example, in the case where articles are added by translation as in a, an, and the in english, the present disclosure may also include the case where nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it will be apparent to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not have any limiting meaning to the invention to which the present disclosure relates.

Claims (6)

1. A terminal, having:

a control unit which generates a plurality of CSI sections, which are a plurality of channel state information sections, wherein at least one CSI section of the plurality of CSI sections includes a first field indicating each of a plurality of PMIs, which are precoding matrix indicators, and a second field indicating a delay corresponding to the PMI; and

a transmitting unit that transmits the plurality of CSI components.

2. The terminal of claim 1, wherein,

the at least one CSI portion includes a plurality of groups of the first field and the second field.

3. The terminal of claim 1 or claim 2,

the control unit maps the second field to be subsequent to the first field in the at least one CSI portion.

4. The terminal of any one of claims 1 to 3,

the first field represents PMI wideband information.

5. The terminal of claim 4, wherein,

the second field represents an index of the delay corresponding to the PMI wideband information.

6. A wireless communication method for a terminal, comprising:

generating a plurality of CSI sections, wherein at least one of the CSI sections includes a first field indicating each of a plurality of Precoding Matrix Indicators (PMIs) and a second field indicating a delay corresponding to the PMI; and

a step of transmitting the plurality of CSI parts.

Images