WO2024042993A1

WO2024042993A1 - Terminal, wireless communication method, and base station

Info

Publication number: WO2024042993A1
Application number: PCT/JP2023/027561
Authority: WO
Inventors: 祐輝松村; 聡永田; ウェイチースン; ジンワン; ランチン
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2022-08-25
Filing date: 2023-07-27
Publication date: 2024-02-29

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives information relating to a plurality of modulation and coding schemes (MCSs) respectively corresponding to a plurality of layers and/or MCSs respectively corresponding to a plurality of layer groups, the plurality of layers and the plurality of layer groups being utilized for transmission of a physical uplink shared channel (PUSCH); and a control unit that, on the basis of a mapping relationship between the plurality of layers and the plurality of layer groups, controls PUSCH transmission of the respective layers and/or the respective layer groups.

Description

Terminal, wireless communication method and base station

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

In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of higher data rates, lower delay, etc. (Non-Patent Document 1). Additionally, LTE-Advanced (3GPP Rel. 10-14) was specified for the purpose of further increasing capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8 and 9).

Successor systems to LTE (for example, also referred to as 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later) are also being considered. .

For future wireless communication systems (e.g. Rel. 18 NR), a user terminal (User Equipment (UE)) will be able to transmit one or more Code Words (CW) using more than four layers. )/Transport Block (TB) using an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) is being considered. Alternatively, simultaneous UL transmission using multiple panels is being considered.

However, the details of this operation have not been sufficiently studied. For example, how to apply/map modulation and coding schemes (MCS) to multiple layers/layer groups/TRPs/panels, or size calculations (e.g. TB size), etc. Not enough consideration has been given to how to control it. If UL transmission control (for example, PUSCH transmission control) is not performed appropriately, there is a risk that throughput may decrease or communication quality may deteriorate.

Therefore, one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately perform UL transmission such as PUSCH.

A terminal according to an aspect of the present disclosure uses a plurality of modulation and coding schemes (MCS) corresponding to a plurality of layers, respectively, to be used for transmission of a physical uplink shared channel (PUSCH). )) and MCSs respectively corresponding to the plurality of layer groups; and a control unit that controls at least one PUSCH transmission.

According to one aspect of the present disclosure, UL transmission such as PUSCH can be performed appropriately.

FIGS. 1A and 1B are diagrams illustrating an example of single-panel UL transmission. 2A to 2C are diagrams showing examples of methods 1 to 3 of simultaneous UL transmission using multi-panels. FIG. 3 is a diagram illustrating an example of PUSCH repetitive transmission using TDM. FIGS. 4A to 4D are diagrams showing variations of PUSCH repetitive transmission. 5A to 5C are diagrams showing other variations of PUSCH repetitive transmission. 6A to 6D are diagrams illustrating an example of the correspondence between layer groups and layers for each number of layers. FIG. 7 is a diagram showing an example of CW-layer mapping of one CW up to four layers. FIG. 8 is a diagram showing an example of CW-layer mapping of one CW of up to eight layers (for example, layers 5-8). FIG. 9 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 10 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 11 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 12 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 13 is a diagram illustrating an example of a vehicle according to an embodiment.

(Spatial relationship for SRS, PUSCH)
The UE receives information (SRS configuration information, e.g., parameters in "SRS-Config" of the RRC control element) used to transmit a measurement reference signal (e.g., Sounding Reference Signal (SRS)). You may.

Specifically, the UE transmits information regarding one or more SRS resource sets (SRS resource set information, e.g., "SRS-ResourceSet" of an RRC control element) and information regarding one or more SRS resources (SRS resource At least one of the RRC control element "SRS-Resource") may be received.

One SRS resource set may be associated with a predetermined number of SRS resources (a predetermined number of SRS resources may be grouped). Each SRS resource may be identified by an SRS resource indicator (SRI) or an SRS resource ID (Identifier).

The SRS resource set information may include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on SRS usage.

Here, the SRS resource types are Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), Aperiodic SRS (A-SRS, AP -SRS)) may be indicated. Note that the UE may transmit the P-SRS and SP-SRS periodically (or periodically after activation), and may transmit the A-SRS based on the SRS request of the DCI.

In addition, the usage (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") is, for example, beam management (beamManagement), codebook-based transmission (codebook: CB), non-codebook-based transmission (nonCodebook: NCB), antenna switching (antennaSwitching), etc. The SRS for codebook-based or non-codebook-based transmission applications may be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmissions based on SRI.

For example, in the case of codebook-based transmission, the UE determines the precoder for PUSCH transmission based on the SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). You may. The UE may determine the precoder for PUSCH transmission based on the SRI for non-codebook-based transmission.

SRS resource information includes SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, transmission Comb, SRS resource mapping (e.g., time and/or frequency resource location, resource offset, resource period, repetition number, SRS (number of symbols, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

The spatial relationship information of the SRS (for example, "spatialRelationInfo" of the RRC information element) may indicate spatial relationship information between the predetermined reference signal and the SRS. The predetermined reference signal includes a synchronization signal/broadcast channel (Synchronization Signal/Physical Broadcast Channel: SS/PBCH) block, a channel state information reference signal (CSI-RS), and an SRS (for example, another SRS). It may be at least one of the following. The SS/PBCH block may be called a synchronization signal block (SSB).

The SRS spatial relationship information may include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the predetermined reference signal.

Note that in the present disclosure, the SSB index, SSB resource ID, and SSBRI (SSB Resource Indicator) may be read interchangeably. Further, the CSI-RS index, CSI-RS resource ID, and CRI (CSI-RS Resource Indicator) may be read interchangeably. Further, the SRS index, SRS resource ID, and SRI may be read interchangeably.

The SRS spatial relationship information may include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned predetermined reference signal.

In NR, transmission of uplink signals may be controlled based on the presence or absence of beam correspondence (BC). BC is, for example, a node (e.g., base station or UE) that determines the beam (transmission beam, Tx beam) to be used for signal transmission based on the beam (reception beam, Rx beam) used for signal reception. It may be the ability to

In addition, BC is transmission/reception beam correspondence (Tx/Rx beam correspondence), beam reciprocity (beam reciprocity), beam calibration (beam calibration), calibrated/non-calibrated (Calibrated/Non-calibrated), reciprocity calibration It may also be referred to as reciprocity, calibrated/non-calibrated, degree of correspondence, degree of coincidence, etc.

For example, in the case of no BC, the UE uses the same beam (spatial domain transmission filter) as the SRS (or SRS resources) instructed by the base station based on the measurement results of one or more SRSs (or SRS resources). , uplink signals (for example, PUSCH, PUCCH, SRS, etc.) may be transmitted.

On the other hand, in the case of BC, the UE uses a beam (spatial domain transmit filter) that is the same as or corresponds to the beam (spatial domain receive filter) used for receiving a predetermined SSB or CSI-RS (or CSI-RS resource). Then, uplink signals (for example, PUSCH, PUCCH, SRS, etc.) may be transmitted.

When the UE is configured with spatial relationship information regarding the SSB or CSI-RS and the SRS for a certain SRS resource (for example, when BC is present), the UE determines the spatial domain for reception of the SSB or CSI-RS. The SRS resource may be transmitted using the same spatial domain filter (spatial domain transmit filter) as the filter (spatial domain receive filter). In this case, the UE may assume that the UE receive beam for SSB or CSI-RS and the UE transmit beam for SRS are the same.

For a certain SRS (target SRS) resource, when the UE is configured with spatial relationship information regarding another SRS (reference SRS) and the relevant SRS (target SRS) (for example, in the case of no BC), the UE The target SRS resource may be transmitted using the same spatial domain filter (spatial domain transmit filter) as for the transmission of the target SRS resource. That is, in this case, the UE may assume that the UE transmission beam of the reference SRS and the UE transmission beam of the target SRS are the same.

The UE may determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a predetermined field (e.g., SRS resource identifier (SRI) field) in the DCI (e.g., DCI format 0_1). Specifically, the UE may use the spatial relationship information (for example, "spatialRelationInfo" of the RRC information element) of the SRS resource determined based on the value of the predetermined field (for example, SRI) for PUSCH transmission.

When using codebook-based transmission for PUSCH, the UE may be configured with two SRS resources by RRC, and may be instructed to use one of the two SRS resources by DCI (1-bit predetermined field). When using non-codebook-based transmission for PUSCH, the UE may have four SRS resources configured by RRC, and one of the four SRS resources may be indicated by DCI (2-bit predetermined field). . In order to use spatial relationships other than the two or four spatial relationships configured by RRC, RRC reconfiguration is required.

Note that DL-RS can be configured for the spatial relationship of SRS resources used for PUSCH. For example, for SP-SRS, a UE can be configured with a spatial relationship of multiple (eg, up to 16) SRS resources by RRC, and can be directed to one of the multiple SRS resources by a MAC CE.

(UL TCI status)
Rel. In the 16 NR, the use of the UL TCI state is being considered as a UL beam directing method. The notification of UL TCI status is similar to the notification of DL beam (DL TCI status) of the UE. Note that the DL TCI state may be interchanged with the TCI state for PDCCH/PDSCH.

The channel/signal (which may be called a target channel/RS) for which the UL TCI state is set (designated) is, for example, PUSCH (DMRS of PUSCH), PUCCH (DMRS of PUCCH), random access channel (Physical Random Access Channel (PRACH)), SRS, etc.

Further, the RS (source RS) that has a QCL relationship with the channel/signal may be, for example, a DL RS (for example, SSB, CSI-RS, TRS, etc.) or a UL RS (for example, SRS, beam management (SRS etc.) may also be used.

In the UL TCI state, an RS that has a QCL relationship with the channel/signal may be associated with a panel ID for receiving or transmitting the RS. The association may be explicitly set (or specified) by upper layer signaling (for example, RRC signaling, MAC CE, etc.), or may be determined implicitly.

The correspondence between the RS and the panel ID may be set and included in the UL TCI status information, or may be set and included in at least one of the resource configuration information, spatial relationship information, etc. of the RS.

The QCL type indicated by the UL TCI state may be the existing QCL types A to D, or may be another QCL type, and may be based on a predetermined spatial relationship, associated antenna port (port index), etc. May include.

When the UE is designated with a relevant panel ID for UL transmission (for example, designated by the DCI), the UE may perform the UL transmission using the panel corresponding to the panel ID. A panel ID may be associated with a UL TCI state, and if a UE is assigned (or activated) a UL TCI state for a given UL channel/signal, the UE selects that UL TCI state according to the panel ID associated with that UL TCI state. /The panel used for signal transmission may be specified.

(Single panel transmission)
At least one of the following transmission methods A and B (single panel UL transmission methods A and B) may be applied to the single panel UL transmission method or the single panel UL transmission method candidate. Note that in the present disclosure, panel/UE panel may be read as a UE capability value set (for example, UE capability value set) reported for each UE capability. Also, in this disclosure, different panels, different spatial relationships, different joint TCI states, different TPC parameters, different antenna ports, etc. may be read interchangeably.

[Transmission method A: Single panel single TRP UL transmission]
Rel. 15 and Rel. In 16, a transmission scheme is used in which the UE transmits UL for one TRP at one time from only one beam and panel (FIG. 1A).

[Transmission method B: Single panel multi-TRP UL transmission]
Rel. In 17, it is considered to perform UL transmission from only one beam and panel at one time and repeatedly transmit to multiple TRPs (FIG. 1B). In the example of FIG. 1B, the UE transmits PUSCH from panel #1 to TRP #1 (switching beams and panels), and then transmits PUSCH from panel #2 to TRP #2. The two TRPs are connected via an ideal backhaul.

(Multi-panel transmission)
Rel. From 18 onwards, simultaneous UL transmission using multiple panels (e.g., simultaneous multi-panel UL transmission (SiMPUL)) for one or more TRPs may be supported to improve UL throughput/reliability. It is being considered. Furthermore, multi-panel UL transmission systems are being considered for predetermined UL channels (for example, PUSCH/PUCCH).

For multi-panel UL transmission, for example, up to X (eg, X=2) and up to Y (eg, Y=2) panels may be supported. In multi-panel UL transmission, if UL precoding instructions for PUSCH are supported, codebooks of existing systems (eg, Rel. 16 and earlier) may be supported for multi-panel simultaneous transmission. When considering single DCI and multi-DCI-based multi-TRP operations, the number of layers is at most x (for example, x = 4) in all panels, and the number of codewords (CW) is at most y in all panels (for example, y = 2) may be used.

At least one of the following methods 1 to 3 (multi-panel UL transmission methods 1 to 3) is being considered as a multi-panel UL transmission method or a multi-panel UL transmission method candidate. Only one of transmission methods 1 to 3 may be supported. Multiple schemes are supported, including at least one of transmission schemes 1 to 3, and one of the multiple transmission schemes may be configured on the UE.

[Transmission method 1: Coherent multi-panel UL transmission]
Multiple panels may be synchronized with each other. All layers are mapped to all panels. Multiple analog beams are directed. The SRS Resource Indicator (SRI) field may be expanded. This scheme may use up to 4 layers for UL.

In the example of FIG. 2A, the UE maps one codeword (CW) or one transport block (TB) to L layers (PUSCH(1,2,...,L)) from each of the two panels. Send L layers. Panel #1 and panel #2 are coherent. Transmission method 1 can obtain a gain due to diversity. The total number of layers in the two panels is 2L. If the maximum total number of layers is 4, the maximum number of layers in one panel is 2.

[Transmission method 2: Non-coherent multi-panel UL transmission of one codeword (CW) or transport block (TB)]
Multiple panels do not need to be synchronized. Different layers are mapped to different panels and one CW or TB for PUSCH from multiple panels. A layer corresponding to one CW or TB may be mapped to multiple panels. This transmission scheme may use up to 4 layers or up to 8 layers for UL. If supporting up to 8 layers, this transmission scheme may support one CW or TB with up to 8 layers.

In the example of FIG. 2B, the UE divides 1 CW or 1 TB into k layers (PUSCH (1, 2, ..., k)) and L - k layers (PUSCH (k+1, k+2, ..., L)). , k layers are transmitted from panel #1, and L−k layers are transmitted from panel #2. Transmission method 2 can obtain gains due to multiplexing and diversity. The total number of layers in the two panels is L.

[Transmission method 3: 2 CW or TB non-coherent multi-panel UL transmission]
Multiple panels do not need to be synchronized. Different layers are mapped to different panels and two CWs or TBs for PUSCH from multiple panels. A layer corresponding to one CW or TB may be mapped to one panel. Layers corresponding to multiple CWs or TBs may be mapped to different panels. This transmission scheme may use up to 4 layers or up to 8 layers for UL. If supporting up to 8 layers, this transmission scheme may support up to 4 layers per CW or TB.

In the example of FIG. 2C, the UE maps CW#1 or TB#1 to k layers (PUSCH(1,2,...,k)) among 2CWs or 2TBs, and maps CW#2 or TB#2 to k layers (PUSCH(1,2,...,k)). is mapped to Lk layers (PUSCH (k+1, k+2, . . . , L)), k layers are transmitted from panel #1, and Lk layers are transmitted from panel #2. Transmission method 3 can obtain gains due to multiplexing and diversity. The total number of layers in the two panels is L.

In each of the above transmission methods, the base station may set or instruct panel-specific transmission for UL transmission using the UL TCI or panel ID. UL TCI (UL TCI status) is Rel. It may be based on signaling similar to the DL beam indication supported in X.15. The panel ID may be implicitly or explicitly applied to the transmission of at least one of the target RS resource or target RS resource set, PUCCH, SRS, and PRACH. If the panel ID is explicitly notified, the panel ID may be configured in at least one of the target RS, target channel, and reference RS (eg, DL RS resource configuration or spatial relationship information).

In one or more transmission methods/modes described above, multi-panel UL transmission (for example, simultaneous multi-panel transmission ( Simultaneous Transmission Across Multiple Panels (STxMP) is being considered.

In STxMP, the following scheme may be applied.
- Single DCI (S-DCI) Space Division Multiplexing (SDM): Different layers/DMRS ports of one PUSCH are precoded separately and transmitted simultaneously from different UE beams/panels.
- S-DCI Frequency Division Multiplexing (FDM)-A scheme: different parts of the frequency domain resources of one PUSCH transmission opportunity are transmitted from different UE beams/panels.
- S-DCI FDM-B method: A method in which two PUSCH transmission opportunities of the same/different RV of the same TB are transmitted from different UE beams/panels on non-overlapping frequency domain resources and the same time domain resources.
- S-DCI SFN-based transmission scheme: transmit the same PUSCH/DMRS from two different UE beams/panels at the same time.
- S-DCI spatial domain repetition scheme: Two PUSCH transmission opportunities with different Redundancy Versions (RVs) of the same TB are transmitted from two different UE beams/panels on the same time and frequency resources.
- M-DCI scheme: two overlapping (fully/partially overlapping in time domain, fully/partially overlapping or non-overlapping in frequency domain) two PUSCHs are transmitted from two different UE beams/panels. method.

Note that in the present disclosure, repeated transmission and transmission may be interchanged. Transmitting multiple TBs may mean transmitting the same TB multiple times or transmitting different TBs.

[Time division multiplexing (TDM)]
The UE may assume that PUSCH repeated transmissions applying time division multiplexing (TDM) are scheduled on different time resources and the same frequency resource. FIG. 3 is a diagram illustrating an example of PUSCH repetitive transmission using TDM. In FIG. 3, the frequency resources of repetition #1 and repetition #2 of PUSCH/PUCCH are the same, but the time resources are different.

[Frequency division multiplexing (FDM)]
The UE may assume that PUSCH/PUCCH repeated transmissions applying Frequency Division Multiplexing (FDM) are scheduled on the same time resource and different frequency resources. That is, when a plurality of coherent panels are used, the UE may transmit PUSCH/PUCCH repetition transmission using FDM in the same time resource and different frequency resources.

FIG. 4A is a diagram showing a first example of repeated transmission using FDM (FDM-A). FIG. 4A shows an example in which PUSCH/PUCCH is repeatedly transmitted once for one TB/UCI.

FIG. 4B is a diagram showing a second example of repeated transmission using FDM (FDM-B). FIG. 4B shows an example in which PUSCH/PUCCH is repeatedly transmitted twice for one TB/UCI.

FIG. 4C is a diagram illustrating an example of repeated transmission using a single frequency network (SFN). FIG. 4C shows an example in which one PUSCH/PUCCH is transmitted using different beams/panels for one TB/UCI.

[Space division multiplexing (SDM)]
The UE may assume that PUSCH repeated transmissions applying space division multiplexing (SDM) are scheduled on the same time resource and the same frequency resource. That is, when a plurality of coherent panels are used, the UE may transmit PUSCH repetition transmission using SDM in the same time resource and the same frequency resource.

FIG. 4D is a diagram showing an example of repeated transmission using SDM. In FIG. 4D, the time and frequency resources of PUSCH/PUCCH repetition #1 and repetition #2 are the same.

FIG. 5A is a diagram illustrating an example of repeated transmission using SDM with one CW. In FIG. 5A, the time and frequency resources of layers #1-2 and #3-4 corresponding to PUSCH/PUCCH are the same.

FIG. 5B is a diagram showing an example of repeated transmission using SDM with two CWs. In FIG. 5B, the time and frequency resources of CW#1 and CW#2 corresponding to PUSCH/PUCCH are the same.

FIG. 5C is a diagram illustrating an example where at least a portion of the time and frequency resources of PUSCH/PUCCH corresponding to each of a plurality of TBs overlap. In FIG. 5C, the time and frequency resources of PUSCH/PUCCH #1 corresponding to the first TB/UCI and PUSCH/PUCCH #2 corresponding to the second TB/UCI are the same.

(Transmission of more than 4 antenna ports)
Rel. 15/16 NR supports uplink (UL) Multi Input Multi Output (MIMO) transmission up to 4 layers. For future wireless communication systems, supporting UL transmission with a number of layers greater than four is being considered to achieve higher spectral efficiency. For example, Rel. 18 NR, transmission of up to 6 ranks using 6 antenna ports, transmission of up to 6 or 8 ranks using 8 antenna ports, etc. are being considered.

For example, eight antennas may be arranged one-dimensionally (1D) or two-dimensionally (2D). In the former case, for example, an antenna configuration having four cross-polarized antennas lined up in the horizontal direction can be considered, and in the latter case, an antenna configuration can be considered that has two cross-polarized antennas lined up horizontally and vertically.

Note that the antenna layout is not limited to these. For example, the number of panels in which the antennas are placed, the orientation of the panels, the coherency of each panel/antenna (fully coherent, partially coherent, non-coherent, etc.), antenna alignment in a particular direction (horizontal, vertical, etc.), polarization antenna configuration. (Single polarization, cross polarization, number of polarization planes, etc.) may be arbitrarily set.

Also, Rel. 15/16 In NR, transmission of one codeword (CW) on one PUSCH was supported, but Rel. Towards 18 NR, it is being considered that the UE transmits more than one CW on one PUSCH. For example, support for 2CW transmission for ranks 5-8, support for 2CW transmission for ranks 2-8, etc. are being considered.

Also, Rel. 15 and Rel. For Rel. 16 UEs, it is assumed that only one beam/panel is used for UL transmission at a given time, but Rel. In order to improve UL throughput and reliability, simultaneous UL transmission of multiple beams/multiple panels (for example, PUSCH transmission) for one or more TRPs is being considered. Note that simultaneous PUSCH transmission of multiple beams/multiple panels may correspond to PUSCH transmission with a number of layers greater than 4, or may correspond to PUSCH transmission with a number of layers equal to or less than 4.

Additionally, precoding matrices for UL transmission using more than four antenna ports are being considered. For example, a codebook for 8-port transmission (which may also be called an 8-transmission UL codebook (8 TX UL codebook)) is being considered.

(transport block size)
Rel. 16 NR requires a modulation order, a coding rate (also referred to as an expected coding rate, a target coding rate, etc.), and an index (for example, MCS index) indicating the modulation order and coding rate. , a table (MCS table) may be defined (may be stored in the UE). Note that in the MCS table, in addition to the above three items, spectral efficiency may be associated.

The UE receives a DCI (UL grant, at least one of DCI format 0_x (x is 0, 1, 2, etc.)) for PUSCH scheduling, and based on the MCS table and the MCS index included in the DCI, The modulation order (Qm) and coding rate (R) for PUSCH may be determined. The DCI for scheduling may be called a scheduling DCI.

Rel. In 16 NR, the UE may determine the TBS for PUSCH using at least one of steps 1) to 4) below.

Step 1)
The UE determines the number of REs in the slot (N _RE ).

Specifically, the UE may determine the number of REs (N' _RE ) allocated to the PUSCH within one PRB. For example, the UE may determine the number of REs (N' _RE ) allocated to the PUSCH within one PRB based on at least one parameter shown in equation (1) below.
Formula (1)
N' _RE =N ^RB _SC・N ^sh _symb -N ^PRB _DMRS -N ^PRB _oh

Here, N ^RB _SC is the number of subcarriers per RB, and may be, for example, N ^RB _SC =12. N ^sh _symb is the number of symbols (eg, OFDM symbols) scheduled within the slot.

N ^PRB _DMRS is the number of REs for DMRS per PRB within the scheduled period. The number of REs for the DMRS may include group overhead regarding code division multiplexing (CDM) of the DMRS indicated by the scheduling DCI.

N ^PRB _oh may be a value configured by upper layer parameters. For example, N ^PRB _oh is the overhead indicated by the upper layer parameter (Xoh-PUSCH), and may have a value of 0, 6, 12, or 18. If Xoh-PUSCH is not configured (notified) to the UE, Xoh-PUSCH may be set to 0. Furthermore, in message 3 (msg3) in the random access procedure, Xoh-PUSCH is set to 0.

The UE may also determine the total number of REs (N _RE ) allocated to the PUSCH. The UE determines the total number of REs (N _{RE ) allocated to the PUSCH based on the number of REs (N' RE} ) allocated to the PUSCH within one PRB and the total number of PRBs (n _PRB ₎ allocated to the UE. (For example, the following formula (2)).
Formula (2)
N _RE = min (156, N' _RE )・n _PRB

Note that the UE quantizes the number of REs (N' _RE ) allocated to PUSCH within one PRB according to a predetermined rule, and calculates the number of REs allocated to the PUSCH based on the quantized number of REs and the total number of PRBs allocated to the UE (n _PRB ). The total number of REs (N _RE ) allocated to the PUSCH may be determined.

Step 2)
The UE determines an intermediate number of information bits (N _info ). Specifically, the UE may determine the intermediate number (N _info ) based on at least one parameter shown in equation (3) below. Note that the intermediate number (N _info ) may be called a temporary TBS (TBS _temp ) or the like.
Formula (3)
N _info =N _RE・R・Q _m・υ

Here, N _RE is the total number of REs allocated to PUSCH. R is a coding rate associated with the MCS index included in the DCI in the MCS table. Q _m is the modulation order associated with the MCS index included in the DCI in the MCS table. υ is the number of PUSCH layers.

Step 3)
If the intermediate number of information bits (N _info ) determined in step 2) is less than or equal to a predetermined threshold (e.g., 3824), the UE quantizes the intermediate number and converts the quantized intermediate number (N' _info ) may be determined. The UE may calculate the quantized intermediate number (N' _info ) using, for example, equation (4).
Formula (4)
N' _info = max (24, 2 ⁿ・floor (N _info /2))
Here, n=max(3, floor(log ₂ (N _info ))

In addition, the UE uses a predetermined table (for example, a table that associates a TBS with an _index (also referred to as a quantization table or a TBS table)), and uses (not less than) may find the nearest TBS.

Step 4)
On the other hand, if the intermediate number of information bits (N _info ) determined in step 2) is greater than (or greater than) a predetermined threshold (e.g. 3824), the UE quantizes the intermediate number (N _info ). , a quantized intermediate number (N' _info ) may be determined. The UE may calculate the quantized intermediate number (N' _info ) using, for example, equation (5). Note that the round function may be rounded up.
Formula (5)
N' _info = max(3840, 2 ⁿ × round ((N _info -24)/2 ⁿ ))
Here, n=floor(log ₂ (N _info -24)) - 5

Here, if the coding rate (R) associated with the MCS index in the DCI in the above MCS table is below (or less than) a predetermined threshold (for example, 1/4), the UE calculates The TBS may be determined based on the at least one parameter shown (eg, using equation (6)).
Formula (6)
TBS=8・C・ceil((N' _info +24)/(8・C))-24
Here, C=ceil((N' _info +24)/3816)

N' _info is a quantized intermediate number, and may be calculated using the above equation (5), for example. Further, C may be the number of code blocks (CB) into which the TB is divided.

On the other hand, the coding rate (R) is greater than (or more than) a predetermined threshold (for example, 1/4), and the quantized intermediate number of information bits (N' _info ) is equal to or greater than the predetermined threshold ( For example, if the TBS is greater than or equal to 8424), the UE may determine the TBS based on at least one parameter shown in equation (7) below (e.g., using equation (7)). good.
Formula (7)
TBS=8・C・ceil((N' _info +24)/(8・C))-24
Here, C=ceil((N' _info +24)/8424)

Further, the coding rate (R) is equal to or less than a predetermined threshold (for example, 1/4), and the quantized intermediate number (N'info) is equal to or less than a predetermined threshold (for example, 8424). If it is less than or equal to (or less than), the UE may determine the TBS based on at least one parameter shown in Equation (8) below (eg, using Equation (8)).
Formula (8)
TBS=8・ceil((N' _info +24)/8)-24

In this way, Rel. 16 NR, the UE determines the intermediate number of information bits ( _NRE ) based on at least one of the number of REs available for PUSCH within a slot, the coding rate (R), the modulation order (Qm), and the number of layers. N _info ) is determined, and the TBS for PUSCH is determined based on the intermediate number (N'info) obtained by quantizing the intermediate number (N _info ).

By the way, in the above-mentioned UL transmission with more than four antenna ports (for example, 8Tx), it is also assumed that different MCSs are required (or applied) for each layer/layer group. Furthermore, in simultaneous multi-panel transmission (STxMP (eg, SDM method)), it is also assumed that a different MCS is required (or applied) for each panel/TRP.

Case 1/2 below is being considered to support MCS for each layer/layer group/panel/TRP.
Case 1: 2 TB/CW is transmitted on PUSCH and MCS is directed to TB/CW Case 2: 1 TB/CW is transmitted on PUSCH and MCS is transmitted on 1 TB/CW layer/layer group (or panel/TRP) ) is indicated for each

However, if MCS is specified for each 1TB/CW layer/layer group (or panel/TRP) as in case 2, how should the mapping between layers and layer groups (or the association between layers and layer groups) be done? The question is how to control it. Alternatively, the problem is how to control the mapping between layers and panels/TRPs (or the association between layers and panels/TRPs).

Also, when MCS is instructed for each layer/layer group (or panel/TRP) of 1 TB/CW as in case 2, how to control the TB size of UL transmission (for example, PUSCH transmission) is important. It becomes a problem.

Therefore, the present inventors focused on the case (for example, case 2 above) where MCS is instructed for each layer/layer group (or panel/TRP) of 1 TB/CW, and devised a method for appropriately performing PUSCH transmission. I came up with the idea.

Hereinafter, embodiments according to the present disclosure will be described in detail. The wireless communication methods according to each embodiment may be applied singly or in combination.

In the present disclosure, "A/B" and "at least one of A and B" may be read interchangeably. Furthermore, in the present disclosure, "A/B/C" may mean "at least one of A, B, and C."

In the present disclosure, "activate", "deactivate", "indicate", "select", "configure", "update", "determine", etc. may be read interchangeably. In this disclosure, supporting, controlling, being able to control, operating, capable of operating, etc. may be read interchangeably.

In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, upper layer parameters, fields, Information Elements (IEs), settings, etc. may be read interchangeably. In the present disclosure, the terms Medium Access Control Element (CE), update command, activation/deactivation command, etc. may be read interchangeably.

In the present disclosure, the upper layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), or the like. Broadcast information includes, for example, a master information block (MIB), a system information block (SIB), a minimum system information (RMSI), and other system information ( Other System Information (OSI)) may also be used.

In the present disclosure, the physical layer signaling may be, for example, downlink control information (DCI), uplink control information (UCI), etc.

In this disclosure, an index, an identifier (ID), an indicator, a resource ID, etc. may be read interchangeably. In this disclosure, sequences, lists, sets, groups, groups, clusters, subsets, etc. may be used interchangeably.

In this disclosure, a panel, a UE panel, a panel group, a beam, a beam group, a precoder, an uplink (UL) transmitting entity, a transmission/reception point (TRP), a base station, and a spatial relation information (SRI) are described. )), spatial relationship, SRS resource indicator (SRI), control resource set (CONtrol REsource SET (CORESET)), Physical Downlink Shared Channel (PDSCH), codeword (CW), transport Block (Transport Block (TB)), reference signal (RS), antenna port (e.g. demodulation reference signal (DMRS) port), antenna port group (e.g. DMRS port group), groups (e.g., spatial relationship groups, Code Division Multiplexing (CDM) groups, reference signal groups, CORESET groups, Physical Uplink Control Channel (PUCCH) groups, PUCCH resource groups), resources (e.g., reference signal resources, SRS resource), resource set (for example, reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI Unified TCI state, common TCI state, quasi-co-location (QCL), QCL assumption, etc. may be read interchangeably.

Additionally, the spatial relationship information identifier (ID) (TCI status ID) and the spatial relationship information (TCI status) may be read interchangeably. “Spatial relationship information” may be interchangeably read as “a set of spatial relationship information”, “one or more pieces of spatial relationship information”, etc. TCI status and TCI may be read interchangeably.

(Wireless communication method)
The UE transmits information on the layer/layer group used for PUSCH transmission, information on the mapping (or association) between layers and layer groups, and information on at least one of the MCSs corresponding to each layer/layer group through RRC/ It may also be received by MAC CE/DCI. The UE may control PUSCH transmission of at least one of each layer and each layer group based on the mapping relationship between the multiple layers and the multiple layer groups.

The following embodiments can be suitably applied to 1 CW PUSCH transmission (for example, 8Tx PUSCH)/simultaneous multi-panel transmission (STxMP PUSCH SDM method) using MCS for each layer/layer group. Of course, the configuration to which this embodiment is applicable is not limited to this.

In the following description, 8Tx PUSCH may be read as PUSCH using more than four antenna ports.

<First embodiment>
The first embodiment relates to mapping between layers and layer groups (or association between layers and layer groups) when MCS is instructed for each layer group of PUSCH. Instructions may be read as settings or applications.

When performing PUSCH transmission using multiple layers, layer groups may be configured/applied/supported. Each layer group may include one or more layers. MCS may be specified for each layer group. The UE may control PUSCH transmission by applying MCS separately for each layer group of PUSCH.

[8Tx PUSCH]
At least one of the following options 1-1 to 1-2 may be applied as the mapping between layers and layer groups.

《Option 1-1》
The mapping (or association) between layers and layer groups may be defined in advance in specifications or the like.

The number of layer groups and the number of layers within each layer group may be defined in advance. For example, layers #0 to #X may be defined as a first layer group, layers #X+1 to #Y may be defined as a second layer group, etc.

The number of layer groups or the number of layers included in each layer group may be defined based on the number of layers applied/configured to PUSCH transmission. That is, different mapping may be defined for each total number of PUSCH layers.

For example, for the 8-layer PUSCH, layers #0 to #3 may correspond to the first layer group, and layers #4 to #7 may correspond to the second layer group (see FIG. 6A).

For the 7-layer PUSCH, layers #0 to #3 may correspond to the first layer group, and layers #4 to #6 may correspond to the second group (see FIG. 6B). Alternatively, layers #0 to #2 may correspond to the first layer group, and layers #3 to #6 may correspond to the second group.

For the 6-layer PUSCH, layers #0 to #3 may correspond to the first layer group, and layers #4 to #5 may correspond to the second group (see FIG. 6C). Alternatively, layers #0 to #1 may correspond to the first layer group, and layers #2 to #5 may correspond to the second group. Alternatively, layers #0 to #2 may correspond to the first layer group, and layers #3 to #5 may correspond to the second group.

For the 5-layer PUSCH, layers #0 to #3 may correspond to the first layer group, and layer #4 may correspond to the second group (see FIG. 6D). Alternatively, layer #0 may correspond to the first layer group, and layers #1 to #4 may correspond to the second group. Alternatively, layers #0 to #2 may correspond to the first layer group, and layers #3 to #4 may correspond to the second group. Alternatively, layers #0 to #1 may correspond to the first layer group, and layers #2 to #4 may correspond to the second group.

Although the case where two layer groups are applied/supported is shown here, the number of layer groups may be three or more. Alternatively, the number of applied/supported layer groups may differ based on the total number of layers applied to PUSCH transmission. For example, three or more layer groups may be applied to M layers or more, and two or less layer groups may be applied to less than M layers.

《Option 1-2》
Information regarding mapping (or association) between layers and layer groups may be configured/instructed from the base station (or network) to the UE using RRC/MAC CE/DCI.

For example, the base station may set/instruct the UE to information regarding the number of layer groups/information regarding the number of layers included in each layer group using RRC/MAC CE/DCI. The UE may determine the correspondence between layer groups and each layer based on information set/instructed by the base station. For example, at least one of the layer group (or layer group index) to be set, the number of layers (or layer index), and the number of layers corresponding to each layer group (or layer index corresponding to each layer group index) may be included in RRC parameters related to PUSCH configuration (for example, PUSCHconfig), or may be included in other RRC parameters.

In option 1-1/option 1-2, information regarding MCS corresponding to each layer group (or applied to each layer group) is transmitted from the base station (or network) to the UE using RRC/MAC CE/DCI. may be set/instructed.

MCS for each layer group may be supported/applied when predetermined conditions are met. The predetermined condition may be at least one of the number of PUSCH layers and the setting of a predetermined RRC parameter. For example, when the number of PUSCH layers is greater than a predetermined value (X), MCS may be configured/applied separately for each layer group. The predetermined value (X) may be, for example, 4, 6, or other values. Alternatively, the UE may apply the MCS separately for each layer group when the predetermined upper layer parameter setting/PUSCH layer number is greater than a predetermined value.

[STxMP PUSCH]
The mapping (or association) between layers and layer groups may be determined based on the panel/TRP/TCI/SRI/SRS resource set with which each layer is associated.

For example, layers associated with a first panel/TRP/TCI/SRI/SRS resource set are mapped to a first layer group and associated with a second panel/TRP/TCI/SRI/SRS resource set. The layers may be mapped to a second layer group.

The first panel may correspond to a panel with a lower panel ID (lower panel ID), and the second panel may correspond to a panel with a higher panel ID (higher panel ID). Alternatively, the first panel may correspond to a panel with a higher panel ID and the second panel may correspond to a panel with a lower panel ID.

The first SRI corresponds to (or is indicated by) the first SRI field, and the second SRI corresponds to (or is indicated by) the second SRI field. may be instructed).

The first SRS resource set may correspond to an SRS resource set with a lower ID, and the second SRS resource set may correspond to an SRS resource set with a higher ID. . Alternatively, the first SRS resource set may correspond to an SRS resource set with a higher ID, and the second SRS resource set may correspond to an SRS resource set with a lower ID.

<Second embodiment>
The second embodiment describes an example of determining the TB size when 1 TB/CW is transmitted on the PUSCH and different layers/layer groups of the PUSCH are transmitted on different MCSs. In the following explanation, UL transmission with more than 4 layers (e.g. 8Tx with more than 4 layers) or simultaneous multi-panel transmission using SDM scheme (e.g. STxMP SDM scheme) will be explained as an example, but the applicable configurations are It is not limited to this.

When transmitting 1 TB/CW on PUSCH and transmitting different layers/layer groups of PUSCH using different MCS, the TB size (or A predetermined parameter (eg, N _info ) in TB sizing may be derived.

[Option 2-1]
N _info may be calculated (or calculated/derived) as the sum of N _{info_i} for all layers/layer groups (or across all layers/layer groups). N _{info_i} may be calculated based on the MCS and the number of layers (or layer number) of the i-th layer/layer group. For example, N _info may be calculated based on the following equation (9).

N corresponds to the number of layers/layer groups. A separate MCS may be indicated for each layer/layer group. N may be predefined in the specification. For example, N may be 2 or may be any other value. Alternatively, N may be set/instructed from the base station to the UE by RRC/MAC CE/DCI.

R(i) corresponds to the target code rate (e.g., target code rate) of the i-th layer/layer group and is indicated for the i-th layer/layer group (or may be determined/derived from the MCS (corresponding to the layer group).

Q _m(i) corresponds to the modulation order of the ith layer/layer group and is indicated for the ith layer/layer group (or (corresponding to) may be determined/derived from the MCS.

N _RE may correspond to the total number of REs allocated to PUSCH (eg, the same N _RE as the existing system). Alternatively, N _RE may be replaced by N _RE(i) indicating the number of REs in the i-th layer/layer group.

In TBS determination, the same method as the steps supported by the existing system (for example, Rel. 16) is applied to other steps other than the N _info calculation step (for example, steps 1, 3, and 4 other than step 2). may be done. For example, step 2 supported in the existing system (e.g. Rel. You may go.

[Option 2-2]
One MCS is selected from the MCSs across all the layers/layer groups, and a TB size (TBS) is calculated (or calculated/derived) based on the selected MCS. It's okay.

One MCS may be selected from a plurality of MCSs across all layers/layer groups by applying at least one of the following options 2-2-1 to 2-2-3.

《Option 2-2-1》
The MCS corresponding to the first, second, or last layer/layer group may be selected.

《Option 2-2-2》
An MCS associated with a given panel/TRP/TCI/SRI/SRS resource set may be selected.

For example, the MCS associated with the first panel/TRP/TCI/SRI/SRS resource set may be selected. Alternatively, the MCS associated with the second panel/TRP/TCI/SRI/SRS resource set may be selected.

《Option 2-2-3》
The MCS to be selected may be determined based on the index of the MCS. For example, the MCS with the smallest index (or the MCS with the smallest index) may be selected. Alternatively, the MCS with the largest index (or the MCS with the largest index) may be selected.

N _info may be calculated (or calculated/derived) based on the selected MCS. For example, N _info may be calculated based on the following equation (10).
Formula (10)
N _info =N _RE・R・Q _m・υ

R corresponds to a target code rate (for example, target code rate) determined from the selected MCS.

Q _m corresponds to the modulation order determined from the selected MCS.

υ corresponds to the total number of PUSCH layers.

N _RE corresponds to the total number of REs allocated to PUSCH.

In TBS determination, the same method as the steps supported by the existing system (for example, Rel. 16) is applied to other steps other than the N _info calculation step (for example, steps 1, 3, and 4 other than step 2). may be done. For example, step 2 supported by the existing system (e.g. Rel. You may go.

<Third embodiment>
The third embodiment relates to CW and layer mapping (or association) when UL transmission with more than 4 layers (eg, 8 layers) is supported.

In the existing system (before Rel. 17), CW and layer mapping (for example, CW-layer mapping) for one CW is supported up to 4 layers (see FIG. 7).

In this embodiment, CW-layer mapping is defined for one CW up to a number of layers greater than 4 (for example, up to 8 layers) (see FIG. 8). FIG. 8 shows an example of CW-layer mapping for one CW in layers 5-8.

The CW-layer mapping for one CW supporting up to 8 layers may be defined by the same principle/mechanism as the CW-layer mapping for one CW supporting up to 4 layers.

For example, the complex-valued modulation symbols d ^(q) (0),..., d ^(q) (M ^(q) _symb -1) for codeword q are defined in layer x(i) = [x ⁽⁰⁾ (i)...x ^(υ-1) (i)] may be mapped to ^T. Here, i=0, 1,..., M ^layer _symb -1, υ corresponds to the number of layers, and M ^layer _symb corresponds to the number of modulation symbols for each layer (for example, modulation symbols).

In this way, by defining the CW-layer mapping for 1 CW when there are more than 4 layers, it is possible to appropriately control PUSCH transmission (1 CW) using more than 4 layers.

<Supplement>
At least one of the embodiments described above may apply only to UEs that have reported or support a particular UE capability.

The particular UE capability may indicate at least one of the following:
- Supporting specific processing/operation/control/information for at least one of the above embodiments.
- Support 8Tx PUSCH, or - Support 8Tx PUSCH using more than 4 layers, up to 8 layers or up to 6 layers, or - 1CW, more than 4 layers (or up to 8 layers or up to 6 layers). ), supporting 8 Tx PUSCH per MCS of layer/layer group, or - supporting STxMP SDM scheme, or - supporting STxMP SDM scheme with 1 CW with MCS per CW.

Further, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (for example, cell, band, BWP). , capability for each frequency range (for example, Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or for each subcarrier spacing (SCS). It may be the ability of

Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all duplex schemes (commonly regardless of the duplex scheme), or may be a capability that is applied across all duplex schemes (for example, Time Division Duplex). The capability may be for each frequency division duplex (TDD)) or frequency division duplex (FDD)).

Also, at least one of the embodiments described above may be applied to at least one of the following PUSCH transmissions.
・Simultaneous multi-panel UL transmission with 4 layers or less,
・UL transmission of 4 layers or more and 8 layers or less,
・Single panel UL transmission with 4 layers or less.

In addition, at least one of the embodiments described above may be configured such that the UE configures/activates specific information related to the embodiment described above (or performs the operation of the embodiment described above) by upper layer signaling/physical layer signaling. / May be applied when triggered.

If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, for example, Rel. 15/16 operations may be applied.

(Additional note)
Regarding one embodiment of the present disclosure, the following invention will be added.
[Additional note 1]
Multiple modulation and coding schemes (MCS) each corresponding to multiple layers and multiple layer groups each used for transmission of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) a corresponding MCS; and a control unit that controls PUSCH transmission of at least one of each layer and each layer group based on the mapping relationship between the plurality of layers and the plurality of layer groups. A terminal having a section and a terminal.
[Additional note 2]
The terminal according to supplementary note 1, wherein the receiving unit receives information regarding mapping relationships between the plurality of layers and the plurality of layer groups.
[Additional note 3]
The control unit is used to determine a transport block size based on a target coding rate and a modulation order determined from a plurality of MCSs respectively corresponding to a plurality of layers or a plurality of MCSs respectively corresponding to a plurality of layer groups. The terminal according to

Supplementary note

1 or 2, which determines a parameter to be used or a transport block size.
[Additional note 4]
The control unit performs a transducer based on a target coding rate and modulation order determined from a specific MCS selected from a plurality of MCSs respectively corresponding to a plurality of layers or a plurality of MCSs respectively corresponding to a plurality of layer groups. The terminal according to any one of Supplementary Notes 1 to 3, which determines a parameter used to determine a port block size or a transport block size.

(wireless communication system)
The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

FIG. 9 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (also simply referred to as system 1) uses Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). It may also be a system that realizes communication using

Additionally, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC has dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)).

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

The wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) where both the MN and SN are NR base stations (gNB)). )) may be supported.

The wireless communication system 1 includes a base station 11 that forms a macro cell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macro cell C1 and form a small cell C2 that is narrower than the macro cell C1. You may prepare. User terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

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

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

Further, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

The plurality of base stations 10 may be connected by wire (for example, optical fiber, X2 interface, etc. compliant with Common Public Radio Interface (CPRI)) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is an upper station, is an Integrated Access Backhaul (IAB) donor, and base station 12, which is a relay station, is an IAB donor. May also be called a node.

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

Core Network 30 is, for example, User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management (SMF), Unified Data Management. T (UDM), ApplicationFunction (AF), Data Network (DN), Location Management Network Functions (NF) such as Function (LMF) and Operation, Administration and Maintenance (Management) (OAM) may also be included. Note that multiple functions may be provided by one network node. Further, communication with an external network (eg, the Internet) may be performed via the DN.

The user terminal 20 may be a terminal compatible with at least one of communication systems such as LTE, LTE-A, and 5G.

In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access method may be used. For example, in at least one of the downlink (DL) and uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

A wireless access method may also be called a waveform. Note that in the wireless communication system 1, other wireless access methods (for example, other single carrier transmission methods, other multicarrier transmission methods) may be used as the UL and DL wireless access methods.

In the wireless communication system 1, the downlink channels include a physical downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (physical broadcast channel (PBCH)), and a downlink control channel (physical downlink control). Channel (PDCCH)) or the like may be used.

In the wireless communication system 1, uplink channels include a physical uplink shared channel (PUSCH) shared by each user terminal 20, an uplink control channel (PUCCH), and a random access channel. (Physical Random Access Channel (PRACH)) or the like may be used.

User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH. User data, upper layer control information, etc. may be transmitted by PUSCH. Furthermore, a Master Information Block (MIB) may be transmitted via the PBCH.

Lower layer control information may be transmitted by PDCCH. The lower layer control information may include, for example, downlink control information (DCI) that includes scheduling information for at least one of PDSCH and PUSCH.

Note that the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. Note that PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

A control resource set (CONtrol REsource SET (CORESET)) and a search space may be used to detect the PDCCH. CORESET corresponds to a resource for searching DCI. The search space corresponds to a search area and a search method for PDCCH candidates (PDCCH candidates). One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. in the present disclosure may be read interchangeably.

The PUCCH allows channel state information (CSI), delivery confirmation information (for example, may be called Hybrid Automatic Repeat Request ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and scheduling request ( Uplink Control Information (UCI) including at least one of SR)) may be transmitted. A random access preamble for establishing a connection with a cell may be transmitted by PRACH.

Note that in this disclosure, downlinks, uplinks, etc. may be expressed without adding "link". Furthermore, various channels may be expressed without adding "Physical" at the beginning.

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 includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DeModulation). Reference Signal (DMRS)), Positioning Reference Signal (PRS), Phase Tracking Reference Signal (PTRS), etc. may be transmitted.

The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS/PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

In addition, in the wireless communication system 1, measurement reference signals (Sounding Reference Signal (SRS)), demodulation reference signals (DMRS), etc. are transmitted as uplink reference signals (UL-RS). good. Note that DMRS may be called a user terminal-specific reference signal (UE-specific reference signal).

(base station)
FIG. 10 is a diagram illustrating an example of the configuration of a base station according to an embodiment. The base station 10 includes a control section 110, a transmitting/receiving section 120, a transmitting/receiving antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.

Note that this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 110 controls the entire base station 10. The control unit 110 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.

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

The transmitting/receiving section 120 may include a baseband section 121, a radio frequency (RF) section 122, and a measuring section 123. The baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212. The transmitter/receiver unit 120 includes a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter/receiver circuit, etc., which are explained based on common understanding in the technical field related to the present disclosure. be able to.

The transmitting/receiving section 120 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section. The transmitting section may include a transmitting processing section 1211 and an RF section 122. The reception section may include a reception processing section 1212, an RF section 122, and a measurement section 123.

The transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.

The transmitter/receiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitter/receiver 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.

The transmitting/receiving unit 120 may form at least one of a transmitting beam and a receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

The transmitting/receiving unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

The transmitting/receiving unit 120 (transmission processing unit 1211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, and discrete Fourier transform (DFT) on the bit string to be transmitted. A baseband signal may be output by performing transmission processing such as processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion.

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

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

The transmitting/receiving unit 120 (reception processing unit 1212) performs analog-to-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) processing (if necessary), applying reception processing such as filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing, User data etc. may also be acquired.

The transmitting/receiving unit 120 (measuring unit 123) may perform measurements regarding the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal. The measurement unit 123 is the receiving power (for example, Reference Signal Received Power (RSRP)), Receive Quality (eg, Reference Signal Received Quality (RSRQ), Signal To InterfERENCE PLUS NOI. SE RATIO (SINR), Signal to Noise Ratio (SNR) , signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), etc. may be measured. The measurement results may be output to the control unit 110.

The transmission path interface 140 transmits and receives signals (backhaul signaling) between devices included in the core network 30 (for example, network nodes providing NF), other base stations 10, etc., and provides information for the user terminal 20. User data (user plane data), control plane data, etc. may be acquired and transmitted.

Note that the transmitting unit and 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 path interface 140.

The transmitter/receiver 120 uses a plurality of modulation and coding schemes (MCS) corresponding to a plurality of layers and a plurality of Information regarding at least one MCS corresponding to each layer group may be transmitted.

The control unit 110 may perform control to instruct mapping relationships between multiple layers and multiple layer groups.

(user terminal)
FIG. 11 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control section 210, a transmitting/receiving section 220, and a transmitting/receiving antenna 230. Note that one or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.

Note that this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.

The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception using the transmitting/receiving unit 220 and the transmitting/receiving antenna 230, measurement, and the like. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as a signal, and may transfer the generated data to the transmitting/receiving unit 220.

The transmitting/receiving section 220 may include a baseband section 221, an RF section 222, and a measuring section 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field related to the present disclosure.

The transmitting/receiving section 220 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section. The transmitting section may include a transmitting processing section 2211 and an RF section 222. The reception section may include a reception processing section 2212, an RF section 222, and a measurement section 223.

The transmitting/receiving antenna 230 can be configured from an antenna, such as an array antenna, as described based on common recognition in the technical field related to the present disclosure.

The transmitter/receiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitter/receiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.

The transmitting/receiving unit 220 may form at least one of a transmitting beam and a receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

The transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (e.g. RLC retransmission control), MAC layer processing (e.g. , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmitting/receiving unit 220 (transmission processing unit 2211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, DFT processing (as necessary), and IFFT processing on the bit string to be transmitted. , precoding, digital-to-analog conversion, etc., and output a baseband signal.

Note that whether or not to apply DFT processing may be based on the settings of transform precoding. When transform precoding is enabled for a certain channel (for example, PUSCH), the transmitting/receiving unit 220 (transmission processing unit 2211) performs the above processing in order to transmit the channel using the DFT-s-OFDM waveform. DFT processing may be performed as the transmission processing, or if not, DFT processing may not be performed as the transmission processing.

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

On the other hand, the transmitting/receiving section 220 (RF section 222) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.

The transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, and decoding (error correction) on the acquired baseband signal. (which may include decoding), MAC layer processing, RLC layer processing, and PDCP layer processing may be applied to obtain user data and the like.

The transmitting/receiving unit 220 (measuring unit 223) may perform measurements regarding the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement results may be output to the control unit 210.

Note that the transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.

The transmitter/receiver 220 uses a plurality of modulation and coding schemes (MCS) corresponding to a plurality of layers and a plurality of Information regarding at least one MCS corresponding to each layer group may be received. The transmitter/receiver 220 may receive information regarding mapping relationships between multiple layers and multiple layer groups.

The control unit 210 may control PUSCH transmission of at least one of each layer and each layer group based on the mapping relationship between the multiple layers and the multiple layer groups.

The control unit 210 uses target coding rates and modulation orders determined from a plurality of MCSs respectively corresponding to a plurality of layers or a plurality of MCSs respectively corresponding to a plurality of layer groups to determine a transport block size. The parameters/transport block size may be determined.

The control unit 210 performs a transformer based on a target coding rate and modulation order determined from a specific MCS selected from a plurality of MCSs respectively corresponding to a plurality of layers or a plurality of MCSs respectively corresponding to a plurality of layer groups. The parameters used to determine the port block size or the transport block size may be determined.

(Hardware configuration)
It should be noted that the block diagram used to explain the above embodiment shows blocks in functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices. The functional block may be realized by combining software with the one device or the plurality of devices.

Here, functions include judgment, decision, judgement, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and consideration. , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (configuration unit) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.

For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 12 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The base station 10 and user terminal 20 described above 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, etc. .

Note that in this disclosure, words such as apparatus, circuit, device, section, unit, etc. can be read interchangeably. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is illustrated, there may be multiple processors. Also, the processing may be performed by one processor, or the processing may be performed by two or more processors simultaneously, sequentially, or using other techniques. Note that the processor 1001 may be implemented using one or more chips.

Each function in the base station 10 and the user terminal 20 is performed by, for example, loading predetermined software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations and communicates via the communication device 1004. This is achieved by controlling at least one of reading and writing data in the memory 1002 and storage 1003.

The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic unit, registers, and the like. For example, at least a portion of the above-mentioned control unit 110 (210), transmitting/receiving unit 120 (220), etc. may be realized by the processor 1001.

Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes in accordance with these. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks may also be realized in the same way.

The memory 1002 is a computer-readable recording medium, and includes at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. It may be composed of one. Memory 1002 may be called a register, cache, main memory, or the like. The memory 1002 can store executable programs (program codes), software modules, and the like to implement a wireless communication method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM), etc.), a digital versatile disk, removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. It may be configured by Storage 1003 may also be called an auxiliary storage device.

The communication device 1004 is hardware (transmission/reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc., for example. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be configured to include. For example, the above-described transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004. The transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).

The input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses for each device.

The base station 10 and user terminal 20 also include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.

(Modified example)
Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal may be interchanged. Also, the signal may be a message. The reference signal may also be abbreviated as RS, and may be called a pilot, pilot signal, etc. depending on the applicable standard. Further, a component carrier (CC) may be called a cell, a frequency carrier, a carrier frequency, or the like.

A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, and radio frame structure. , a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.

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

A slot may include multiple mini-slots. Each minislot may be made up of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot. PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.

Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.

For example, one subframe may be called a TTI, a plurality of consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), a code block, a codeword, etc., or may be a processing unit of scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI that is shorter than the normal TTI may be referred to as an abbreviated TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

Note that long TTI (for example, normal TTI, subframe, etc.) may be read as TTI with a time length exceeding 1 ms, and short TTI (for example, short TTI, etc.) It may also be read as a TTI having the above TTI length.

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

Additionally, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

Note that one or more RBs include a physical resource block (Physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, and an RB. They may also be called pairs.

Additionally, a resource block may be configured by one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (also called partial bandwidth, etc.) refers to a subset of consecutive common resource blocks (RB) for a certain numerology in a certain carrier. Good too. Here, the common RB may be specified by an RB index based on a common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

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

At least one of the configured BWPs may be active and the UE may not expect to transmit or receive a given signal/channel outside of the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

Note that the structures of the radio frame, subframe, slot, minislot, symbol, etc. described above are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB, The number of subcarriers, the number of symbols within a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

In addition, the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values from a predetermined value, or using other corresponding information. may be expressed. For example, radio resources may be indicated by a predetermined index.

The names used for parameters and the like in this disclosure are not limiting in any respect. Furthermore, the mathematical formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable designation, the various names assigned to these various channels and information elements are not in any way exclusive designations. .

The information, signals, etc. 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, etc., which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of

Additionally, information, signals, etc. may be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layer. Information, signals, etc. may be input and output via multiple network nodes.

Input/output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Information, signals, etc. that are input and output can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

Notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods. For example, the notification of information in this disclosure may be physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof It may be carried out by

Note that the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc. Further, RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like. Further, MAC signaling may be notified using, for example, a MAC Control Element (CE).

Further, notification of prescribed information (for example, notification of "X") is not limited to explicit notification, but may be made implicitly (for example, by not notifying the prescribed information or by providing other information) (by notification).

The determination may be made by a value expressed by 1 bit (0 or 1), or by a boolean value expressed by true or false. , may be performed by numerical comparison (for example, comparison with a predetermined value).

Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.

Additionally, software, instructions, information, etc. may be sent and received via a transmission medium. For example, if the software uses wired technology (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (such as infrared, microwave, etc.) to , a server, or other remote source, these wired and/or wireless technologies are included within the definition of a transmission medium.

The terms "system" and "network" used in this disclosure may be used interchangeably. "Network" may refer to devices (eg, base stations) included in the network.

In this disclosure, "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "Transmission Configuration Indication state (TCI state)", "space "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" are interchangeable. can be used.

In the present disclosure, "Base Station (BS)", "Wireless base station", "Fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission/Reception Point (TRP)", "Panel" , "cell," "sector," "cell group," "carrier," "component carrier," and the like may be used interchangeably. A base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.

A base station can accommodate one or more (eg, three) cells. If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is connected to a base station subsystem (e.g., an indoor small base station (Remote Radio Communication services can also be provided by the Head (RRH)). The term "cell" or "sector" refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.

In the present disclosure, a base station transmitting information to a terminal may be interchanged with the base station instructing the terminal to control/operate based on the information.

In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" are used interchangeably. can be done.

A mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , handset, user agent, mobile client, client, or some other suitable terminology.

At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, or the like.

The moving body refers to a movable object, and the moving speed is arbitrary, and naturally includes cases where the moving body is stopped. The mobile objects include, for example, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, and ships (ships and other watercraft). , including, but not limited to, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and items mounted thereon. Furthermore, the mobile object may be a mobile object that autonomously travels based on a travel command.

The moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (manned or unmanned). ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

FIG. 13 is a diagram illustrating an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (current sensor 50, (including a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service section 59, and a communication module 60. Be prepared.

The drive unit 41 is composed of, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor. The steering unit 42 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

The electronic control unit 49 includes a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input/output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control section 49 may be called an electronic control unit (ECU).

The signals from the various sensors 50 to 58 include a current signal from the current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheel 46/rear wheel 47 obtained by the rotation speed sensor 51, and a signal obtained by the air pressure sensor 52. air pressure signals of the front wheels 46/rear wheels 47, a vehicle speed signal acquired by the vehicle speed sensor 53, an acceleration signal acquired by the acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by the accelerator pedal sensor 55, and a brake pedal sensor. 56, a shift lever 45 operation signal obtained by the shift lever sensor 57, and an object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc. There are signals etc.

The information service department 59 includes various devices such as car navigation systems, audio systems, speakers, displays, televisions, and radios that provide (output) various information such as driving information, traffic information, and entertainment information, and these devices. It consists of one or more ECUs that control the The information service unit 59 provides various information/services (for example, multimedia information/multimedia services) to the occupants of the vehicle 40 using information acquired from an external device via the communication module 60 or the like.

The information service unit 59 may include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accepts input from the outside, and an output device that performs output to the outside (for example, display, speaker, LED lamp, touch panel, etc.).

The driving support system unit 64 includes millimeter wave radar, Light Detection and Ranging (LiDAR), a camera, a positioning locator (for example, Global Navigation Satellite System (GNSS), etc.), and map information (for example, High Definition (HD)). maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., inertial measurement units (IMUs), inertial navigation systems (INS), etc.), artificial intelligence ( Artificial Intelligence (AI) chips, AI processors, and other devices that provide functions to prevent accidents and reduce the driver's driving burden, as well as one or more devices that control these devices. It consists of an ECU. Further, the driving support system section 64 transmits and receives various information via the communication module 60, and realizes a driving support function or an automatic driving function.

The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 communicates via the communication port 63 with a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, which are included in the vehicle 40. Data (information) is transmitted and received between the axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58.

The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, various information is transmitted and received with an external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10, user terminal 20, etc. described above. Further, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (it may function as at least one of the base station 10 and the user terminal 20).

The communication module 60 receives signals from the various sensors 50 to 58 described above that are input to the electronic control unit 49, information obtained based on the signals, and input from the outside (user) obtained via the information service unit 59. At least one of the information based on the information may be transmitted to an external device via wireless communication. The electronic control unit 49, various sensors 50-58, information service unit 59, etc. may be called an input unit that receives input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above input.

The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device, and displays it on the information service section 59 provided in the vehicle. The information service unit 59 is an output unit that outputs information (for example, outputs information to devices such as a display and a speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60). may be called.

The communication module 60 also stores various information received from external devices into a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 controls the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, and left and right rear wheels provided in the vehicle 40. 47, axle 48, various sensors 50-58, etc. may be controlled.

Additionally, the base station in the present disclosure may be replaced by a user terminal. For example, communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the user terminal 20 may have the functions that the base station 10 described above has. Further, words such as "uplink" and "downlink" may be replaced with words corresponding to inter-terminal communication (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may be replaced with sidelink channels.

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

In this disclosure, the operations performed by the base station may be performed by its upper node in some cases. In a network that includes one or more 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 (e.g. It is clear that this can be performed by a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc. (though not limited thereto), or a combination thereof.

Each aspect/embodiment described in this disclosure may be used alone, in combination, or may be switched and used in accordance with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure use an example order to present elements of the various steps and are not limited to the particular order presented.

Each aspect/embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is an integer or decimal number, for example)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802 .11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods. The present invention may be applied to systems to be used, next-generation systems expanded, modified, created, or defined based on these systems. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G) may be applied.

As used in this disclosure, the phrase "based on" does not mean "based solely on" unless explicitly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

As used in this disclosure, any reference to elements using the designations "first," "second," etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in any way.

The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "judgment" can mean judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry ( For example, searching in a table, database, or other data structure), ascertaining, etc. may be considered to be "determining."

In addition, "judgment (decision)" includes receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), access ( may be considered to be "determining", such as accessing data in memory (eg, accessing data in memory).

In addition, "judgment" is considered to mean "judging" resolving, selecting, choosing, establishing, comparing, etc. Good too. In other words, "judgment (decision)" may be considered to be "judgment (decision)" of some action.

Furthermore, "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

The "maximum transmit power" described in this disclosure may mean the maximum value of transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the It may also mean rated UE maximum transmit power).

As used in this disclosure, the terms "connected", "coupled", or any variations thereof refer to any connection or coupling, direct or indirect, between two or more elements. can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may be replaced with "access."

In this disclosure, when two elements are connected, they may be connected using one or more electrical wires, cables, printed electrical connections, etc., as well as in the radio frequency domain, microwave can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the light (both visible and invisible) range.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may also be interpreted similarly to "different."

Where "include", "including" and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising". It is intended that Furthermore, the term "or" as used in this disclosure is not intended to be exclusive or.

In this disclosure, when articles are added by translation, such as a, an, and the in English, the present disclosure may include that the nouns following these articles are plural.

In the present disclosure, "less than or equal to", "less than", "more than", "more than", "equal to", etc. may be read interchangeably. In addition, in this disclosure, "good", "bad", "large", "small", "high", "low", "early", "slow", "wide", "narrow", etc. The words are not limited to the original, comparative, and superlative, and may be interpreted interchangeably. In addition, in this disclosure, words meaning "good", "bad", "large", "small", "high", "low", "early", "slow", "wide", "narrow", etc. may be interpreted as an expression with "the i-th" (i is any integer), not only in the elementary, comparative, and superlative, but also interchangeably (for example, "the highest" can be interpreted as "the i-th highest"). may be read interchangeably).

In this disclosure, "of", "for", "regarding", "related to", "associated with", etc. are used to refer to each other. It may be read differently.

Although the invention according to the present disclosure has been described in detail above, it is clear for 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 as determined based on the claims. Therefore, the description of the present disclosure is for the purpose of illustrative explanation and does not have any limiting meaning on the invention according to the present disclosure.

This application is based on Japanese Patent Application No. 2022-133893 filed on August 25, 2022. All of this information will be included here.

Claims

Multiple modulation and coding schemes (MCS) each corresponding to multiple layers and multiple layer groups each used for transmission of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) a corresponding MCS, and a receiving unit that receives information regarding at least one of the following;
A terminal comprising: a control unit that controls PUSCH transmission of at least one of each layer and each layer group based on mapping relationships between the plurality of layers and the plurality of layer groups.
The terminal according to claim 1, wherein the receiving unit receives information regarding mapping relationships between the plurality of layers and the plurality of layer groups.
The control unit is used to determine a transport block size based on a target coding rate and a modulation order determined from a plurality of MCSs respectively corresponding to a plurality of layers or a plurality of MCSs respectively corresponding to a plurality of layer groups. The terminal according to claim 1, wherein the terminal determines a parameter for transport block size or a transport block size.
The control unit performs a transducer based on a target coding rate and modulation order determined from a specific MCS selected from a plurality of MCSs respectively corresponding to a plurality of layers or a plurality of MCSs respectively corresponding to a plurality of layer groups. The terminal according to claim 1, wherein the terminal determines a parameter used to determine a port block size or a transport block size.
Multiple modulation and coding schemes (MCS) each corresponding to multiple layers and multiple layer groups each used for transmission of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) receiving information regarding at least one of the corresponding MCS;
A wireless communication method for a terminal, comprising: controlling PUSCH transmission of at least one of each layer and each layer group based on mapping relationships between the plurality of layers and the plurality of layer groups.
Multiple modulation and coding schemes (MCS) each corresponding to multiple layers and multiple layer groups each used for transmission of the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) a corresponding MCS, and a transmitter that transmits information regarding at least one of the following;
A base station comprising: a control unit configured to instruct mapping relationships between a plurality of layers and a plurality of layer groups.