WO2024247110A1 - Terminal, wireless communication method, and base station - Google Patents

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives a switching instruction for uplink (UL) transmission that uses a plurality of panels; and a control unit that controls panel switching for the uplink transmission on the basis of the switching instruction. The switching instruction includes information related to a specific panel and to a sounding reference signal (SRS) resource set associated with said specific panel. This aspect of the present disclosure makes it possible to appropriately perform UL transmission in which a plurality of panels are used.

Description

Terminal, wireless communication method and base station

This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.

Long Term Evolution (LTE) was specified for Universal Mobile Telecommunications System (UMTS) networks with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) was specified for the purpose of achieving higher capacity and greater sophistication over LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also under consideration.

3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Univers al　Terrestrial　Radio　Access　Network　(E-UTRAN);　Overall　description;　Stage 2　(Release　8)”, April 2010

In future wireless communication systems, a UE will be able to use one of multiple panels (or multiple beams) for uplink (UL) transmission. In addition, in Rel. 18 and later, support for simultaneous multi-panel transmission (Simultaneous Transmission across Multiple Panels (STxMP)) using multiple panels toward one or more transmission/reception points (Transmission/Reception Points (TRPs)) is being considered for improving UL throughput/reliability.

However, in UL transmission using multiple panels (e.g., simultaneous UL transmission), there may be cases where switching between panels is necessary. How to control UE operation in such cases has not been fully considered. If this consideration is not sufficient, UL transmission using multiple panels may not be performed appropriately, which may result in reduced throughput and other degradation of system performance.

Therefore, one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control UL transmission, even when UL transmission is performed using multiple panels.

A terminal according to one embodiment of the present disclosure has a receiver that receives a switching instruction for uplink (UL) transmission using multiple panels, and a controller that controls panel switching for the uplink transmission based on the switching instruction, where the switching instruction includes information regarding a specific panel and a measurement reference signal (SRS) resource set associated with the specific panel.

According to one aspect of the present disclosure, UL transmission can be performed appropriately using multiple panels.

FIG. 1 is a diagram illustrating an example of an association between a precoder type and a TPMI index. 2A and 2B are diagrams illustrating an example of a single panel UL transmission. 3A to 3C are diagrams showing examples of methods 1 to 3 of simultaneous UL transmission using multiple panels. 4A to 4C are diagrams showing an example of a PUSCH transmission method. 5A to 5C are diagrams showing other examples of the PUSCH transmission method. FIG. 6 is a diagram showing an example of simultaneous UL transmission using multiple panels. FIG. 7 is a diagram showing an example of simultaneous transmission of PUSCH and PUCCH. FIG. 8 is a diagram showing an example of a CSI report for multi-group based beam reporting in Rel. 17 NR and later. 9A-9C show an example of a single TRP single panel transmission. Figures 10A-10C show an example of multi-TRP multi-panel transmission using two panels. FIG. 11 shows an example of multi-TRP multi-panel transmission using all three panels. FIG. 12 is a diagram showing a pattern of a UL transmission scheme using TDM. FIG. 13 is a diagram showing a pattern of a UL transmission scheme using SDM. FIG. 14 is a diagram showing a pattern of a UL transmission scheme using SFN. FIG. 15 is a diagram showing an example of panel switching according to the embodiment 3-1. FIG. 16 is a diagram showing an example of panel switching according to embodiment 3-2. FIG. 17 is a diagram showing an example pattern/combination of a PUSCH transmission scheme indicated by a specific code point in an SRS resource set indicator field according to embodiment 3-2. FIG. 18 is a diagram showing an example pattern/combination of a PUSCH transmission scheme indicated by a specific code point in an SRS resource set indicator field according to embodiment 3-2. FIG. 19 is a diagram showing an example pattern/combination of a PUSCH transmission scheme indicated by a specific code point in an SRS resource set indicator field according to embodiment 3-2. FIG. 20 is a diagram showing an example of panel switching according to the embodiment 3-3. FIG. 21 is a diagram showing an example pattern/combination of a PUSCH transmission scheme indicated by a specific code point in an SRS resource set indicator field according to embodiment 3-3. FIG. 22 is a diagram showing an example pattern/combination of a PUSCH transmission scheme indicated by a specific code point in an SRS resource set indicator field according to embodiment 3-3. 23A-23B are diagrams showing examples of patterns/combinations of PUSCH transmission schemes indicated by specific code points in the SRS resource set indicator field/SRS resource indicator field according to embodiments 3-4. 24A and 24B are diagrams showing patterns of UL transmission schemes for each CORESETPoolIndex according to the fifth embodiment. FIG. 25 is a diagram showing an example of panel switching according to the embodiment 5-1. 26A-26B are diagrams showing examples of patterns/combinations of PUSCH transmission schemes indicated by specific code points in an SRS resource set indicator field relating to embodiment 5-2. FIG. 27 is a diagram showing an example of a scenario supporting multiple panels according to the sixth embodiment. FIG. 28 is a diagram showing another example of a scenario supporting multiple panels according to the sixth embodiment. FIG. 29 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 30 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 31 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 32 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 33 is a diagram illustrating an example of a vehicle according to an embodiment.

(PUSCH precoder)
In NR, it is considered that a UE will support at least one of Codebook (CB)-based transmission and Non-Codebook (NCB)-based transmission.

For example, it is being considered that the UE will use at least a sounding reference signal (SRS) resource indicator (SRI) for measurement to determine a precoder (precoding matrix) for CB-based and/or NCB-based Physical Uplink Shared Channel (PUSCH) transmissions.

In the case of CB-based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI, a transmitted rank indicator (Transmitted Rank Indicator (TRI)), a transmitted precoding matrix indicator (Transmitted Precoding Matrix Indicator (TPMI)), etc. In the case of NCB-based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI.

The SRI, TRI, TPMI, etc. may be notified to the UE using Downlink Control Information (DCI). The SRI may be specified by the SRS Resource Indicator field (SRI field) of the DCI, or by the parameter "srs-ResourceIndicator" included in the RRC information element "ConfiguredGrantConfig" of the configured grant PUSCH. The TRI and TPMI may be specified by the "Precoding information and number of layers" field of the DCI.

The UE may report UE capability information regarding the precoder type, and the base station may set the precoder type based on the UE capability information by higher layer signaling. The UE capability information may be information on the precoder type used by the UE in PUSCH transmission (which may be represented by the RRC parameter "pusch-TransCoherence").

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

The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), etc.

The UE may determine the precoder to be used for PUSCH transmission based on precoder type information (which may be represented by the RRC parameter "codebookSubset") included in the PUSCH configuration information (the "PUSCH-Config" information element of the RRC signaling) notified by higher layer signaling. The UE may set a subset of the PMI specified by the TPMI by the codebookSubset.

The precoder type may be specified by any one of full coherent, partial coherent, and non-coherent, or a combination of at least two of these (e.g., may be expressed by parameters such as "fullyAndPartialAndNonCoherent" and "partialAndNonCoherent").

Fully coherent may mean that all antenna ports used for transmission are synchronized (may be expressed as being able to align the phase, using the same precoder, etc.). Partially coherent may mean that some of the antenna ports used for transmission are synchronized, but those some ports cannot be synchronized with other ports. Non-coherent may mean that the antenna ports used for transmission cannot be synchronized.

Note that a UE that supports a fully coherent precoder type may be assumed to support partially coherent and non-coherent precoder types. A UE that supports a partially coherent precoder type may be assumed to support a non-coherent precoder type.

The precoder type may be interpreted as coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc.

The UE may determine, from multiple precoders (which may also be called precoding matrices, codebooks, etc.) for CB-based transmission, a precoding matrix corresponding to a TPMI index obtained from a DCI (e.g., DCI format 0_1, etc.) that schedules an UL transmission.

Figure 1 shows an example of the association between precoder types and TPMI indexes. Figure 1 corresponds to a table of precoding matrix W for single-layer (rank 1) transmission using four antenna ports in DFT-s-OFDM (Discrete Fourier Transform spread OFDM, where transform precoding is enabled).

In FIG. 1, if the precoder type (codebookSubset) is full, partial, and noncoherent (fullyAndPartialAndNonCoherent), the UE is notified of a TPMI from 0 to 27 for single layer transmission. Also, if the precoder type is partial and noncoherent (partialAndNonCoherent), the UE is set with a TPMI from 0 to 11 for single layer transmission. If the precoder type is noncoherent (nonCoherent), the UE is set with a TPMI from 0 to 3 for single layer transmission.

Note that, as shown in FIG. 1, a precoding matrix in which only one component in each column is not zero may be called a noncoherent codebook. A precoding matrix in which a predetermined number (not all) of components in each column are not zero may be called a partially coherent codebook. A precoding matrix in which all components in each column are not zero may be called a fully coherent codebook.

Noncoherent and partially coherent codebooks may be referred to as antenna selection precoders. Fully coherent codebooks may be referred to as non-antenna selection precoders.

In the present disclosure, a partially coherent codebook may refer to a codebook (precoding matrix) corresponding to a TPMI specified by DCI for codebook-based transmission by a UE configured with a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent"), excluding a codebook corresponding to a TPMI specified by DCI for a UE configured with a non-coherent codebook subset (e.g., RRC parameter "codebookSubset" = "nonCoherent") (i.e., in the case of single-layer transmission with four antenna ports, the codebook for TPMI = 4 to 11).

In the present disclosure, a fully coherent codebook may refer to a codebook (precoding matrix) corresponding to a TPMI specified by DCI for codebook-based transmission by a UE configured with a fully coherent codebook subset (e.g., RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent"), excluding a codebook corresponding to a TPMI specified by DCI for a UE configured with a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent") (i.e., in the case of single-layer transmission with four antenna ports, the codebook for TPMI = 12 to 27).

(Control of SRS and PUSCH transmission)
In Rel. 15 NR, a terminal (user terminal, User Equipment (UE)) may receive information (SRS configuration information, for example, parameters in the RRC control element "SRS-Config") used to transmit a measurement reference signal (for example, a Sounding Reference Signal (SRS)).

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

An SRS resource set may relate to (group together) a number of SRS resources. Each SRS resource may be identified by an SRS Resource Indicator (SRI) or SRS Resource Identifier (ID).

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 type may indicate any of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic CSI (A-SRS). Note that the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation) and transmit A-SRS based on an SRS request in the DCI.

Furthermore, the usage (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may be, for example, beam management (beamManagement), codebook (CB), noncodebook (NCB), antenna switching, etc. The SRS for codebook or noncodebook usage may be used to determine a precoder for codebook-based or noncodebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) transmission based on the SRI.

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

The SRS resource information may include an SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, transmit comb, SRS resource mapping (e.g., time and/or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, spatial relationship information of SRS, etc.

The spatial relationship information of the SRS (e.g., the RRC information element "spatialRelationInfo") may indicate spatial relationship information between a specific reference signal and the SRS. The specific reference signal may be at least one of a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block, a Channel State Information Reference Signal (CSI-RS), and an SRS (e.g., another SRS). The SS/PBCH block may be referred to as a Synchronization Signal Block (SSB).

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

In addition, in this disclosure, the SSB index, SSB resource ID, and SSB Resource Indicator (SSBRI) may be interchangeable. Also, the CSI-RS index, CSI-RS resource ID, and CSI-RS Resource Indicator (CRI) may be interchangeable. Also, the SRS index, SRS resource ID, and SRI may be interchangeable.

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

When spatial relationship information regarding an SSB or CSI-RS and an SRS is configured for a certain SRS resource, the UE may transmit the SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter for receiving the SSB or CSI-RS (spatial domain receive filter). In this case, the UE may assume that the UE receive beam for the SSB or CSI-RS and the UE transmit beam for the SRS are the same.

When spatial relationship information regarding a certain SRS (target SRS) resource is configured between another SRS (reference SRS) and the SRS (target SRS), the UE may transmit the target SRS resource using the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) for transmitting the reference SRS. In other words, 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 (e.g., DCI format 0_1) based on the value of a specific field (e.g., an SRS resource identifier (SRI) field) in the DCI. Specifically, the UE may use spatial relationship information of the SRS resource (e.g., the RRC information element "spatialRelationInfo") determined based on the value of the specific field (e.g., SRI) for PUSCH transmission.

In Rel. 15/16 NR, when using codebook-based transmission for PUSCH, the UE is configured by RRC with a codebook-use SRS resource set having up to two SRS resources, and one of the up to two SRS resources may be indicated by DCI (1-bit SRI field). The transmission beam for PUSCH is specified by the SRI field.

The UE may determine the TPMI and number of layers (transmission rank) for the PUSCH based on the precoding information and number of layers field (hereinafter also referred to as the precoding information field). The UE may select a precoder based on the TPMI, number of layers, etc. from an uplink codebook for the same number of ports as the number of SRS ports indicated by the upper layer parameter "nrofSRS-Ports" set for the SRS resource specified by the SRI field.

In Rel. 15/16 NR, when non-codebook-based transmission is used for PUSCH, the UE is configured by RRC with a non-codebook-used SRS resource set having up to four SRS resources, and one or more of the up to four SRS resources may be indicated by DCI (2-bit SRI field).

The UE may determine the number of layers (transmission rank) for the PUSCH based on the SRI field. For example, the UE may determine that the number of SRS resources specified by the SRI field is the same as the number of layers for the PUSCH. The UE may also calculate a precoder for the SRS resources.

If the CSI-RS (which may be called associated CSI-RS) associated with the SRS resource (or the SRS resource set to which the SRS resource belongs) is configured by a higher layer, the transmission beam of the PUSCH may be calculated based on (the measurement of) the configured associated CSI-RS. Otherwise, the transmission beam of the PUSCH may be specified by the SRI.

The UE may be configured to use codebook-based PUSCH transmission or non-codebook-based PUSCH transmission by a higher layer parameter "txConfig" indicating a transmission scheme. The parameter may indicate a value of "codebook" or "nonCodebook."

In this disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may refer to PUSCH when "codebook" is configured as the transmission scheme in the UE. In this disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may refer to PUSCH when "non-codebook" is configured as the transmission scheme in the UE.

Incidentally, future wireless communication systems (e.g., Rel. 18 NR and later) are expected to support simultaneous UL transmission (e.g., simultaneous multi-panel UL transmission (STxMP)) using multiple beams/panels/TRPs toward one or more transmission/reception points (TRPs).

For example, Rel. 18 is considering simultaneous UL transmission using up to 2 TRPs/2 panels. Also, taking into account single DCI-based and multi-DCI-based multi-TRP operation, it is expected that the total number of layers will be up to 4 across all panels, and the total number of codewords will be up to 2 across all panels. Of course, the number of TRPs, panels, layers, and codewords are not limited to these.

(Single Panel Transmission)
At least one of the following transmission schemes A and B (single panel UL transmission schemes A and B) may be applied to the single panel UL transmission scheme or the single panel UL transmission scheme candidate. In this disclosure, the panel/UE panel may be read as a UE capability value set (e.g., UE capability value set) reported for each UE capability. In this disclosure, different panels, different spatial relationships, different joint TCI states, different TPC parameters, different antenna ports, etc. may be read as mutually interchangeable terms.

<Transmission method A: Single panel, single TRP, UL transmission>
In Rel. 15 and Rel. 16, a transmission scheme is used in which a UE transmits UL for one TRP from only one beam and panel at one time (FIG. 2A).

<Transmission method B: Single panel multi-TRP UL transmission>
In Rel. 17, UL transmission from only one beam and panel at one time and repeated transmission to multiple TRPs is considered (FIG. 2B). In the example of FIG. 2B, 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)
In Rel. 18 and later, in order to improve UL throughput/reliability, support for simultaneous UL transmission using multiple panels (e.g., simultaneous multi-panel UL transmission (STxMP)) for one or more TRPs is being considered. Also, a multi-panel UL transmission scheme is being considered for a specific UL channel (e.g., PUSCH/PUCCH) etc.

For example, up to X panels (e.g., X=2) and up to Y panels (e.g., Y=2) may be supported for multi-panel UL transmission. In multi-panel UL transmission, if UL precoding instructions for PUSCH are supported, codebooks of existing systems (e.g., before Rel. 16) may be supported for simultaneous multi-panel transmission. Considering single DCI and multi-DCI based multi-TRP operation, the number of layers may be up to x (e.g., x=4) in all panels, and the number of codewords (CWs) may be up to y (e.g., y=2) in all panels.

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 candidate multi-panel UL transmission method. Only one of transmission methods 1 to 3 may be supported. Multiple methods including at least one of transmission methods 1 to 3 may be supported, and one of the multiple transmission methods may be configured in 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 extended. This scheme may use up to 4 layers for the UL.

In the example of FIG. 3A, the UE maps one codeword (CW) or one transport block (TB) to L layers (PUSCH (1, 2, ..., L)) and transmits L layers from each of the two panels. Panel #1 and panel #2 are coherent. Transmission method 1 can obtain diversity gain. 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 may not 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. The transmission scheme may use up to 4 layers or up to 8 layers for UL. If up to 8 layers are supported, the transmission scheme may support one CW or TB with up to 8 layers.

In the example of FIG. 3B, the UE maps 1 CW or 1 TB to k layers (PUSCH(1, 2, ..., k)) and L-k layers (PUSCH(k+1, k+2, ..., L)), transmits k layers from panel #1, and transmits L-k layers from panel #2. Transmission method 2 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.

<Transmission method 3: Non-coherent multi-panel UL transmission of two CWs or TBs>
Multiple panels may not be synchronized. Different layers are mapped to different panels and two CWs or TBs for PUSCH from multiple panels. Layers 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. When supporting up to 8 layers, this transmission scheme may support up to 4 layers per CW or TB.

In the example of FIG. 3C, of the 2CWs or 2TBs, the UE maps CW#1 or TB#1 to k layers (PUSCH (1, 2, ..., k)), maps CW#2 or TB#2 to L-k layers (PUSCH (k+1, k+2, ..., L)), transmits k layers from panel #1, and transmits L-k layers from panel #2. Transmission method 3 can obtain gains through 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 configure or indicate panel-specific transmission for UL transmission using UL TCI or panel ID. UL TCI (UL TCI state) may be based on signaling similar to DL beam indication supported in Rel. 15. Panel ID may be implicitly or explicitly applied to transmission of at least one of target RS resource or target RS resource set, PUCCH, SRS, and PRACH. If panel ID is explicitly signaled, panel ID may be configured in at least one of target RS, target channel, and reference RS (e.g., DL RS resource configuration or spatial relationship information).

(Simultaneous multi-panel transmission)
In one or more of the transmission methods/modes described above, multi-panel UL transmission (e.g., Simultaneous Transmission across Multiple Panels (STxMP)) for a PUSCH schedule based on one DCI (single DCI)/a PUSCH schedule based on multiple DCIs (multi-DCI) is being considered.

<Single DCI-based STxMP>
In simultaneous multi-panel transmission (STxMP) in a single DCI based multi-TRP system, the following scheme may be applied to UL transmission (e.g., PUSCH).
Space Division Multiplexing (SDM) method: Different layers/DMRS ports of one PUSCH are precoded separately and transmitted simultaneously from different UE beams/panels (see Figures 4A and 4B).
- Space Division Multiplexing (SDM repetition) scheme: Two PUSCH transmission opportunities with different redundancy versions (RVs) of the same TB are transmitted simultaneously from two different UE beams/panels on the same time and frequency resources (see Fig. 4C).
Frequency Division Multiplexing (FDM)-A scheme: Different portions of the frequency domain resources of one PUSCH transmission occasion (eg, one PUSCH transmission occasion) are transmitted from different UE beams/panels (see FIG. 5A).
FDM-B scheme: Two PUSCH transmission opportunities with the same/different RV for the same TB are transmitted from different UE beams/panels on non-overlapping frequency domain resources and the same time domain resources (see FIG. 5B).
SFN-based transmission scheme: all the same layers/DMRS ports of one PUSCH are transmitted simultaneously from two different UE beams/panels (see Fig. 5C).

Note that in this disclosure, repeated transmission and transmission may be interpreted as interchangeable. Transmitting multiple TBs may mean transmitting the same TB multiple times, or transmitting different TBs.

[Space division multiplexing (SDM)]
The UE may assume that the PUSCH repetitive transmissions using Space Division Multiplexing (SDM) are scheduled on the same time and frequency resources. That is, the UE may assume that the PUSCH repetitive transmissions using Space Division Multiplexing (SDM) are scheduled on the same time and frequency resources. When used, repeated PUSCH transmissions using SDM may be transmitted in the same time resource and the same frequency resource.

Figure 4A shows an example of repeated transmission using SDM in one CW. In Figure 4A, the time and frequency resources of layers #1-2 and #3-4 corresponding to PUSCH/PUCCH are the same.

Figure 4B is a diagram showing an example of repeated transmission using SDM in two CWs. In Figure 4B, the time and frequency resources of CW#1 and CW#2 corresponding to PUSCH/PUCCH are the same.

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

Note that PUSCH transmission using SDM (e.g., repeated PUSCH transmission) may be configured such that at least a portion of the time and frequency resources overlap.

[Frequency division multiplexing (FDM)]
The UE may assume that PUSCH/PUCCH repeated transmissions using Frequency Division Multiplexing (FDM) are scheduled on the same time resources and different frequency resources. When a panel is used, PUSCH/PUCCH repeated transmission using FDM may be transmitted in the same time resource and different frequency resources.

FIG. 5A is a diagram showing a first example of repeated transmission using FDM (FDM-A). FIG. 5A shows an example in which one PUSCH/PUCCH repeated transmission is performed for one TB/UCI.

FIG. 5B is a diagram showing a second example of repeated transmission using FDM (FDM-B). FIG. 5B shows an example in which PUSCH/PUCCH repeated transmission is performed twice per TB/UCI.

Figure 5C is a diagram showing an example of repeated transmission using a single frequency network (SFN). Figure 5C shows an example in which one PUSCH/PUCCH is transmitted using a different beam/panel for one TB/UCI.

As shown in Figures 4A and 4B, when simultaneous multi-panel transmission based on spatial division multiplexing (STxMP SDM scheme) is performed for non-codebook PUSCH transmission, different layers/DMRS ports of one PUSCH can be precoded separately and transmitted simultaneously from different UP panels.

For simultaneous multi-panel transmission based on spatial division multiplexing of non-codebook-based PUSCH, the following two options are assumed as SRI indication (e.g., SRI indication):

Option 1
One SRI combination is prescribed. SRI combinations may be prescribed from non-codebook SRS resources across two panels.

Option 2
Multiple (e.g., two) SRS combinations may be indicated, where each SRI combination may be indicated from non-codebook SRS resources of one panel (e.g., NCB SRS resources of one panel).

An SRI combination may include one or more SRS resources (e.g., SRS resources for non-codebooks). For example, one SRI combination (or SRI field) may indicate the SRI/SRS resources corresponding to each panel. An SRI combination may be read as an SRI set or an SRI group.

<Multi-DCI based STxMP>
In Rel.18 and later, simultaneous transmission of UL channels/UL signals (e.g., PUSCH/PUCCH/SRS) (e.g., PUSCH+PUSCH, PUSCH+PUCCH, SRS+SRS) is expected to be supported in STxMP in a multi-DCI-based multi-TRP system (see FIG. 6). As an example, it is expected that at least one of simultaneous transmission of multiple PUSCHs (e.g., PUSCH+PUSCH) and simultaneous transmission of PUSCH and PUCCH is supported.

In Rel. 18 and later, a method of multiplexing/mapping UCI in cases where one PUCCH overlaps with multiple PUSCHs in simultaneous transmission of PUSCH and PUCCH is being considered. The multiple PUSCHs may be multiple PUSCHs (related to STxMP) that are transmitted simultaneously.

In this case, the multiple PUSCHs may each be associated with a different TRP/panel (see Figure 7).

In the existing specifications (up to Rel. 17), when the RRC parameter "ackNackFeedbackMode" is set to "separate" for multi-DCI multi-TRP, the UE does not assume that dynamically scheduled PUSCH/PUCCH overlaps with other dynamically scheduled PUSCH/PUCCH in the time domain (see Figure 7).

This occurs because when the RRC parameter "ackNackFeedbackMode" is set to "separate", non-ideal backhaul is assumed between the two TRPs, and each TRP cannot recognize the dynamic schedule of the other TRP in a timely manner.

In addition, in this disclosure, dynamically scheduled PUSCH/PUCCH may mean PUSCH/PUCCH scheduled using a dynamic grant, or PUSCH/PUCCH dynamically scheduled using DCI.

The UE may also transmit two independent PUSCHs associated with different TRPs simultaneously in the same active BWP. The total number of layers corresponding to these two PUSCHs may be specified as a maximum of X (or less than or equal to X), where X may be, for example, 4 or some other value. The maximum number of layers for each of the two PUSCHs may be X/2 (for example, 2) or some other value.

For multi-DCI based STxMP, in the PUSCH schedule of simultaneous PUSCH transmission (e.g., STxMP PUSCH+PUSCH transmission), the SRS resource set and the CORESET pool index may be associated based on a predetermined rule. For example, a first SRS resource set may be associated with a first CORESET pool index (e.g., 0), and another SRS resource set may be associated with a second CORESET pool index (e.g., 1).

The PUSCH may be associated with an SRS resource set that has the same CORESER pool index. For example, the PUSCH may be associated with an SRS resource set that is associated with the CORESER pool index of the CORESET that corresponds to the PDCCH that schedules the PUSCH.

The method of interpreting the SRI/TPMI field in the DCI may be different for dynamic grant-based PUSCH (e.g., DG-PUSCH) and configuration grant-based PUSCH (e.g., type 2 CG-PUSCH).

In the case of DG-PUSCH, the indicated SRI/TPMI field may correspond to the SRS resource set associated with the same value as the CORESET pool index of the CORESET in which the DCI scheduling the PUSCH (e.g., scheduling DCI format 0_1/0_2) was received. In the case of CG-PUSCH of type 2, the indicated SRI/TPMI field may correspond to the SRS resource set associated with the same value as the CORESER pool index of the CORESET in which the activation DCI was received.

In the case of type 1 CG-PUSCH, one SRS resource set index may be set in the RRC parameters related to the configuration grant (e.g., ConfiguredGrantConfig), and a specific RRC parameter (e.g., srs-ResourceIndicator/precodingAndNumberOfLayers) may correspond to the SRS resource set.

For multi-DCI based STxMP (e.g. PUSCH+PUSCH), it is also assumed that asymmetric panels are considered and the number of SRS resources/SRS ports (or number of SRS ports)/max rank (e.g. maxrank)/codebook subset/full power mode are configured separately for the two panels/TRPs. Asymmetric panels may mean that the two panels have different capabilities for number of SRS ports/max rank/codebook subset etc.

For example, when two SRS resource sets are configured for multi-DCI-based STxMP (e.g., PUSCH+PUSCH), the predetermined parameters corresponding to the two configured SRS resource sets may be configured separately. The predetermined parameters may be, for example, at least one of the number of SRS resources, the maximum number of maximum rank/SSB index (e.g., maxRank/Lmax), the codebook subset, and the full power mode.

(Group-Based Beam Report)
For future wireless communication systems (e.g., Rel. 17 and later), beam management-related extensions (e.g., beam reports suitable for multiple TRPs, which may also be called extended group-based beam reports) for user terminals (user terminals, User Equipment (UE)) having multiple panels (multi-panels) and multiple transmission/reception points (multi-TRPs) are being considered.

Group-based beam reporting is suitable for cases where multi-TRP transmission, multi-panel reception, etc. are applied, since it can report on a group containing multiple (e.g., two) CRIs/SSBRIs in one report. For example, it can be used to report the best beam for TRP1 as RSRP#1, and the best beam for TRP2 as differential RSRP#2.

In Rel. 15 and 16, a UE with groupBasedBeamReporting enabled can only report one group containing two different CRI/SSBRI (which may be read as beam index) for each reporting setting. For this reason, it is expected that the number of groups that can be reported by group-based beam reporting will be expanded for Rel. 17.

For example, the resource sets for two channel measurements (e.g., CMR set) may be configured/triggered to periodic/semi-persistent/aperiodic resource types. The resource sets for two channel measurements (e.g., CMR set) may be, for example, two CSI-SSB-resource sets/two NZP-CSI-RS-resource sets. The UE may be configured to be able to report up to four CRI/SSBRI groups. The number of groups that can be reported (or the number of candidates 1/2/3/4) may be configured by a higher layer parameter (e.g., nrofReportedGroups).

Each group may have multiple (e.g., two) CRI/SSBRIs, and the CRI/SSBRIs of each group may be selected from two CSI resource sets (CSI-SSB-resource set/NZP-CSI-RS-resource set) for report setting. The two CRI/SSBRIs of each group may also mean that the UE can receive simultaneously (e.g., receive simultaneously using one spatial domain receive filter).

Figure 8 is a diagram showing an example of a CSI report when performing extended group-based beam reporting. Figure 8 shows the mapping order of CSI fields included in one report (e.g., the nth CSI report #n) for group-based CSI/RSRP or SSBRI/RSRP reporting.

The CSI report may include up to X resource groups (e.g., X=4). Each group includes multiple (e.g., two) CRIs/SSBRIs. Here, a case is shown in which CRI or SSBRI#1 and CRI or SSBRI#2 are reported for each resource group.

The CSI field may include a resource set indicator (e.g., Resource Set Indicator). The value of the resource set indicator may indicate the CSI resource set associated with the maximum measured value of L1-RSRP. The value of the resource set indicator may indicate the CSI resource set from which the CRI or SSBRI#1 of the first resource group is reported. For example, a 1-bit resource set indicator having a value of 0 or 1 may indicate the first or second CSI resource set, respectively, from which the CRI or SSBRI#1 of the first resource group may be reported. All remaining resource groups (e.g., if there are other resource groups to be reported) follow the same mapping order as the first resource group. For example, the CRI or SSBRI#1 of all remaining resource groups may be reported (or selected) from the CSI resource set indicated by the resource set indicator.

In other words, the CRI or SSBRI#1 of each group may be reported (or selected) from a CSI resource set indicated by a resource set indicator (e.g., a Resource Set Indicator), and the CRI or SSBRI#2 may be reported (or selected) from another CSI resource set. In this way, in all resource groups, the CRI or SSBRI#1 and the CRI or SSBRI#2 may be reported from different CSI resource sets.

Also, the RSRP corresponding to the beam index (e.g., CRI or SSBRI) of each resource group is reported. For example, the RSRP of the CRI or SSBRI of a particular group may be reported, and the other RSRP may be a difference from the RSRP of the CRI or SSBRI of the particular group. The RSRP of the CRI or SSBRI of a particular group may be the RSRP of the CRI or SSBRI#1 of the first resource group.

Enhanced group-based beam reporting may be configured (or enabled/activated) by a predetermined upper layer parameter (e.g., groupBasedBeamReporting-r17). Alternatively, enhanced group-based beam reporting may be determined to be enabled when an upper layer parameter regarding the number of groups to report (e.g., nrofReportedGroups-r17) is configured.

(analysis)
<Background 1>
In Rel. 17, "the maximum supported number of SRS (antenna) ports" may be reported as a panel-specific UE capability. This maximum supported number of SRS ports is supported by reporting a UE capability value set index in the L1-RSRP/L1-SINR report. The "maximum supported number of SRS (antenna) ports" may be read as the maximum number of supported SRS ports, the maximum supported number of SRS ports, etc.

Specifically, when a UE is configured with CSI-ReportConfig and the higher layer parameter reportQuantity is set to cri-RSRP- Index or ssb-Index-RSRP- Index, the index of the UE capability set indicating the maximum number of SRS ports supported is reported together with the SSBRI/CRI and L1-RSRP pair.

<Background 2>
In multi-TRP, repeated transmission of PUSCH using time division multiplexing (TDM) is supported. In Rel. 17, two CB/NCB SRS resource sets can be configured. However, multi-TRP PUSCH transmission using two asymmetric panels is not supported. In CB PUSCH, the two SRS resources indicated by the two SRIs should have the same port number. Meanwhile, in NCB PUSCH, the two SRS resource sets should have the same SRS resource number.

For example, if two SRIs are indicated, the UE must expect the nrofSRS-Ports (number of SRS ports) of the two indicated SRS resources to be the same. Also, if two SRS resource sets are configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 and the upper layer parameter usage in SRS-ResourceSet is set to nonCodebook, the UE is not expected to configure different numbers of SRS resources in the two SRS resource sets.

<Background 3>
As described above, in Rel. 18 and later, simultaneous multi-panel transmission (STxMP) in a single DCI-based multi-TRP system supports UL transmission (e.g., PUSCH transmission) using SDM/SFN. In the STxMP, two CB/NCB SRS resource sets can be configured. Also, two SRI/TPMI fields can be indicated.

However, Rel. 18 does not support multi-TRP PUSCH transmission using two asymmetric panels with different capabilities (e.g., different number of SRS ports). As mentioned above, in CB PUSCH, the two SRS resources indicated by the two SRIs should have the same number of ports. On the other hand, in NCB PUSCH, the two SRS resource sets should have the same number of SRS resources.

That is, in Rel. 18, there is no agreement to support:
In single DCI-based STxMP, different numbers of SRS resources are configured for the two SRS resource sets for CB (when full power mode 2 is not configured)/NCB.
In CB PUSCH, the two SRS resources indicated by the two SRIs may have different port numbers.

In addition, in Rel. 18, for two SRS resource sets configured for multi-DCI-based STxMP (e.g., PUSCH+PUSCH), existing specifications (e.g., Rel. 17) may be reused with respect to the maximum number of SRS resources/SRS ports in each set.

Here, it is considered whether or how to support two different configurations regarding full power mode and antenna port coherency type between multiple SRS resource sets.

<Background 4>
Panel-specific parameters in UL transmission (e.g., PUSCH/SRS) may be determined based on at least one of the following options 1 to 6.

(Option 1)
A panel-specific parameter/panel index/UE capability value set (index) may be associated/configured with an SRS resource set/SRS resource. For example, a panel-specific parameter for a PUSCH transmission may be determined from an SRS resource set indicated by an SRS resource set indicator/SRS resource indicated by an SRS resource indicator (SRI) corresponding to the PUSCH transmission.

(Option 2)
Panel-specific parameters/panel indices/UE capability value sets (indexes) may be associated/configured to joint TCI/UL TCI. For example, panel-specific parameters for a UL transmission may be determined from the joint TCI/UL TCI corresponding to the UL transmission.

(Option 3)
Panel specific parameters/panel index/UE capability set (index) may be associated/configured to a resource/resource set of a certain reference signal (e.g. SSB/CSI-RS/SRS). For example, panel specific parameters for UL transmission may be determined from the QCL source RS/PL RS (path loss reference signal) corresponding to the UL transmission.

(Option 4)
The panel-specific parameters may be associated/configured to a UE capability value set (index). For example, the panel-specific parameters for a UL transmission may be determined from the QCL source RS/PL RS (path loss reference signal) corresponding to the UL transmission and the UE capability value set (index) reported for the reference signal in a beam report.

(Option 5)
The panel-specific parameters/panel index/UE capability value set (index) may be directly indicated in the scheduling information (e.g., scheduling DCI for UL transmission).

(Option 6)
A panel-specific parameter/panel index/UE capability set (index) may be associated with a group-based beam report, e.g., a panel-specific parameter/panel index/UE capability set (index) may be associated with each beam/pair of beams in a DL group-based beam report where the pair of beams may be received simultaneously, or may be associated with each beam/pair of beams in a Rel. 18 UL group-based beam report where the pair of beams may be transmitted simultaneously.

In each of the above options, the panel-specific parameters may refer to at least one of the following: number of SRS ports/number of SRS resources/full power mode/codebook subset.

<Background 5>
As mentioned above, in Rel.18 and later, simultaneous transmission (e.g., PUSCH+PUSCH, PUSCH+PUCCH, SRS+SRS) of UL channels/UL signals (e.g., PUSCH/PUCCH/SRS) is supported in STxMP in a multi-DCI-based multi-TRP system. In the STxMP, two CB/NCB SRS resource sets can be configured.

For example, CORESETPoolInex#0 (=0) is associated with the SRS resource set of the CB/NCB with the lower ID, and CORESETPoolIndex#1 (=1) is associated with the SRS resource set of the CB/NCB with the higher ID.

<Question 1>
However, in some scenarios (e.g., the above-mentioned single DCI-based multi-TRP with TDM repetitive transmission, single DCI-based multi-TRP with SDM/SFN STxMP), there may be asymmetric panels, i.e., the UE has two panels with different capabilities. In this case, it is possible to associate/configure the two SRS resource sets with different panel-specific parameters, including number of SRS ports/number of SRS resources/rank number/full power mode/codebook subset, etc.

On the other hand, another possible scenario may be where the UE has two or more panels and switches between multiple panels. More specifically, consider a case where the UE has three panels, each with two, two, and four ports, respectively.

In a given UL transmission, it is assumed that there will be a switch between STxMP using two panels (2 ports + 2 ports) and STxMP using two panels (2 ports + 4 ports). The panel switch may be due to UE movement or activation/deactivation of the UE panel.

UE behavior to support such panel switching has not yet been clearly specified.

<Question 2>
Furthermore, it is required to dynamically switch UL transmission for each of the above-mentioned multiple (e.g., two) panels. In this case, it is necessary to specify specific field contents of DCI that instructs panel switching.

<Question 3>
Also, in STxMP in a multi-DCI-based multi-TRP system, as described above, CORESETPoolInex#0 (=0) is associated with the SRS resource set of the CB/NCB with a lower ID, and CORESETPoolIndex#1 (=1) is associated with the SRS resource set of the CB/NCB with a higher ID. This correspondence is fixed.

However, when the UE moves, it is expected that the correspondence between the TRP (CORESETPoolIndex) and the panel will change. For example, if the multiple panels are symmetrical, there will be no problem if the QCL of the corresponding SRS resource set is updated when switching panels.

In a symmetric panel, a fixed relationship between CORESETPoolIndex and SRS resource set applies. Therefore, when switching panels, the base station (gNB) can update the QCL of SRS resource set #0 and apply SRS resource set #0 to panel #1.

On the other hand, in the case of asymmetric panels, if the correspondence between the TRP (CORESETPoolIndex) and the panel changes due to UE movement, problems may occur with the fixed relationship between CORESETPoolIndex and the SRS resource set. For example, consider a case where panel #0 has two ports and panel #1 has four ports, and two ports are configured in SRS resource set #0 and four ports are configured in SRS resource set #1.

For example, if a UE moves and performs UL transmission from panel #1 to TRP #0, the problem is that CORESETPoolIndex=0 is still associated with SRS resource set #0. Ideally, the correspondence between CORESETPoolIndex and SRS resource set should also be switchable.

Thus, in an asymmetric panel, the fixed relationship between CORESETPoolIndex and SRS resource sets does not work, since SRS resource set #0 cannot be applied to panel #1.

<Question 4>
In addition, STxMP, which is applied to two or more panels, may be further expanded in the future. In particular, there is room for consideration on how to support two or more panels in STxMP in a multi-DCI-based multi-TRP system.

As mentioned above, in future wireless communication systems (Rel. 18 and later), it is being considered that UEs will perform UL transmission using multiple beams/panels/TRPs (e.g., simultaneous multi-panel UL transmission (STxMP)).

However, there has been insufficient consideration given to how to support UL transmissions that use multiple panels (especially asymmetric panels).

If this consideration is not sufficient, overlapping UL channels/signals may not be transmitted properly, which may result in reduced system performance, including reduced throughput.

The inventors therefore came up with a method to solve these problems.

Embodiments of the present disclosure will now be described in detail with reference to the drawings. The wireless communication methods according to the embodiments may be applied independently or in combination.

(Various changes in interpretation, etc.)
In the present disclosure, "A/B" and "at least one of A and B" may be interpreted as interchangeable. Also, in the present disclosure, "A/B/C" may mean "at least one of A, B, and C."

In this disclosure, terms such as notify, activate, deactivate, indicate, select, configure, update, and determine may be read as interchangeable terms. In this disclosure, terms such as support, control, capable of control, operate, and capable of operating may be read as interchangeable terms.

In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In this disclosure, Medium Access Control (MAC Control Element (CE)), update commands, activation/deactivation commands, etc. may be interchangeable.

In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocols (e.g., NR Positioning Protocol A (NRPPa)/LTE Positioning Protocol (LPP)) messages), or a combination of these.

In the present disclosure, the MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

In the present disclosure, the physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.

In the present disclosure, multi-TRP, multi-TRP system, multi-TRP transmission, multi-PDSCH, channel using multi-TRP, channel using multiple TCI states/spatial relationships, multi-TRP enabled by RRC/DCI, multiple TCI states/spatial relationships enabled by RRC/DCI, and at least one of multi-TRP based on a single DCI and multi-TRP based on multiple DCI may be read as interchangeable. In the present disclosure, multi-TRP based on multi-DCI, and a CORESETPoolIndex value of 1 is set for the CORESET may be read as interchangeable. In the present disclosure, multi-TRP based on a single DCI, and at least one code point of the TCI field is mapped to two TCI states may be read as interchangeable.

In the present disclosure, single TRP, single DCI, single PDCCH, multi-TRP based on single DCI, single TRP system, single TRP transmission, single PDSCH, channel using single TRP, channel using one TCI state/spatial relationship, multi-TRP not being enabled by RRC/DCI, multiple TCI states/spatial relationships not being enabled by RRC/DCI, a CORESETPoolIndex value of 1 not being set for any CORESET and no code point in the TCI field being mapped to two TCI states, and two TCI states on at least one TCI code point being activated may be read as interchangeable.

In the present disclosure, panel, UE capability value set (e.g., UE capability value set), TRP, SRS resource set, CORESET pool index, beam group, TCI state group, spatial relationship group, reference signal group, path loss RS group, antenna, antenna port, UL transmit spatial filter, and UL spatial domain filter may be interpreted as interchangeable.

In the present disclosure, STxMP, simultaneous UL transmission using multi-panel, UL transmission (multiple UL transmissions) in at least the same time resource/domain using multi-panel, UL transmission (multiple UL transmissions) in at least the same time resource/domain using multi-TRP, UL transmission (multiple UL transmissions) in at least the same time resource/domain for multi-TRP, etc. may be interpreted as interchangeable.

In this disclosure, ignore, drop, abort, cancel, puncture, rate match, postpone, do not transmit, etc. may be read as interchangeable.

In this disclosure, UL channel, UL signal, and UL transmission may be interpreted as interchangeable.

(Wireless communication method)
A UE may transmit one or more UL signals/channels using multiple panels, at least in the same time domain (e.g., same time resource/symbol/slot/sub-slot), which may be referred to hereinafter in this disclosure as STxMP (operation/scheme).

In each embodiment of the present disclosure, the transmission of one or more UL signals/channels may simply be referred to as a UL transmission.

In this disclosure, UL transmission, STxMP, and UL transmission using (applying) TDM/SDM/SFN may be interpreted as interchangeable.

In the present disclosure, an asymmetric UE panel (asymmetric panel/different panel) may mean, for example, having different capabilities between multiple panels in terms of maximum number of SRS ports/maximum number of SRS resources/maximum rank/full power mode/codebook subset/coherent type, etc. On the other hand, a symmetric UE panel (symmetric panel/same panel) may mean having the same capabilities between multiple panels in terms of maximum number of SRS ports/maximum number of SRS resources/maximum rank/full power mode/codebook subset/coherent type, etc.

In this disclosure, repeated transmission and transmission may be read as interchangeable.

In the present disclosure, panel switching may be indicated by a DCI (scheduling/triggering DCI) that schedules/triggers an UL channel/signal.

In the following embodiment, PUSCH transmission is mainly exemplified as UL transmission, but PUCCH transmission and SRS transmission can also be applied to UL transmission.

First Embodiment
The first embodiment relates to problem 1 above and describes a combination of multiple panels.

A multi-panel UE (a UE that supports/has multiple panels) can support at least one of the following cases 1 to 6.

(Case 1)
The UE may be instructed to dynamically switch UL transmissions between multiple (e.g., three) panels, each of which may have different capabilities than the other panels, i.e., the multiple panels may be asymmetric with respect to each other.

For example, the number of SRS ports on each of the three panels (panels #0 to #2) may be 1, 2, and 4.

(Case 2)
The UE may be instructed to dynamically switch UL transmissions between multiple (e.g., three) panels, where two of the three panels may have the same capabilities and the other panel may have a different capability from the two panels, i.e., the two panels with the same capabilities may be symmetric panels and the other panel may be asymmetric with respect to the two panels.

For example, the number of SRS ports on each of the three panels (panels #0 to #2) may be 2, 2, and 4. In other words, panels #0 and #1 may be symmetric panels, and panel #2 may be an asymmetric panel.

(Case 3)
The UE may be instructed to dynamically switch UL transmissions between multiple (e.g., four) panels, each of which may have different capabilities than the other panels, i.e., the multiple panels may be asymmetric with respect to each other.

For example, the capabilities (number of SRS ports/coherence type) of each of the four panels (panels #0 to #3) may be one-port or two-port coherent transmission, four-port fully coherent transmission, or four-port partially coherent transmission. Here, panels #2 and #3 both have four SRS ports, but different coherence types (fully coherent/partially coherent). For this reason, panels #2 and #3 have different capabilities and constitute asymmetric panels.

In this way, case 3 shows an example of configuring an asymmetric panel by using different coherent types even if the number of ports is the same between panels.

(Case 4)
The UE may be instructed to dynamically switch UL transmissions between multiple (e.g., four) panels, which may be divided into multiple groups with different capabilities, and each panel in the same group may have the same capabilities.

(Case 4-1)
The four panels may be divided into two groups (groups #0 and #1). Case 4-1 shows an example in which two panels belong to one group. The two panels (panels #0 and #1) belonging to group #0 may have the same capabilities. The two panels (panels #2 and #3) belonging to group #1 may have the same capabilities. Here, groups #0 and #1 have different capabilities.

For example, the number of SRS ports on each of the four panels (panels #0 to #3) may be 2, 2, 4, and 4. That is, in this example, panels #0 and #1, which have the same number of ports (2), are symmetrical panels, and panels #2 and #3, which have the same number of ports (4), are symmetrical panels. On the other hand, panels #0/#1 (group #0) and panels #2/#3 (group #1) are asymmetrical panels.

(Case 4-2)
The four panels may be divided into two groups (groups #0 and #1). Case 4-2 shows an example in which three panels (panels #0 to #2) belong to one group #0, and one panel #3 belongs to the other group #1. The three panels (panels #0 to #2) belonging to group #0 may have the same capabilities. Here, groups #0 and #1 have different capabilities.

For example, the number of SRS ports on each of the four panels (panels #0 to #3) may be 2, 2, 2, and 4. That is, in this example, panels #0, #1, and #2, which have the same number of ports (2), are symmetrical panels. On the other hand, panels #0/#1/#2 (group #0) and panel #3 (group #1) are asymmetrical panels.

(Case 5)
The UE may be instructed to dynamically switch UL transmissions between multiple (e.g., M) panels. The M panels may be divided into multiple (e.g., N) groups, where N may be less than or equal to M. Each group may have different capabilities. Each panel in the same group may have the same capabilities. That is, the panels may have different capabilities between different groups and the same capabilities within the same group. In other words, the panels may constitute asymmetric panels between different groups and symmetric panels within the same group.

(Case 6)
The UE may be instructed to dynamically switch UL transmissions among multiple (e.g., M) panels, all of which may have the same capabilities, i.e., the M panels may be symmetrical to one another.

According to the first embodiment described above, it is possible to clearly distinguish/classify multiple cases in which multiple panels are applied.

Second Embodiment
The second embodiment relates to problem 1 above and describes a UL transmission scheme utilizing multiple panels.

The second embodiment is broadly divided into embodiments 2-1 to 2-3. Each of the embodiments 2-1 to 2-3 may be applied alone or in combination.

<<Embodiment 2-1>>
The embodiment 2-1 relates to repeated transmission of a PUSCH using TDM.

In single DCI-based multi-TRP, when PUSCH repetition transmission (single DCI multi-TRP TDM PUSCH repetition) is enabled by specific higher layer signaling, the UE may be instructed to dynamically switch between the following UL transmission schemes (2-1-1 to 2-1-4) between M (M>2) panels.

(2-1-1)
- Single TRP single panel PUSCH transmission using one of M panels.

The one panel may be any panel selected from the M number of panels. Furthermore, it is not limited to one panel, and several (multiple) panels may be selected from the M number of panels.

(2-1-2)
- Multi-TRP TDM PUSCH repeated transmission using two of M panels.

Different PUSCH repeat transmissions may be transmitted from different panels to different TRPs. The two panels may be any pair of panels (which may be called a panel group) selected from M panels. In this case, the total number C of panel group candidates may be represented as C(M,2), where M represents the total number of panels and 2 represents the number of panels per panel group.

In addition, the number of panel groups that can be selected is not limited to one, and any number (several) of panel groups greater than or equal to two may be selected.

In the multi-TRP TDM PUSCH repeat transmission, dynamic switching of panel/TRP order may be supported. For example, in a multi-TRP TDM PUSCH repeat transmission using two panels (panels #1 and #2), the first PUSCH repeat transmission may be associated with panel #1/#2.

(2-1-3)
- Multi-TRP TDM PUSCH repeated transmission using X panels (2<X<M) out of M panels.

Different PUSCH repeat transmissions may be transmitted from different panels to different TRPs. The X panels may be any panel group (which may be called a panel group) selected from among the M panels. That is, any panel group including X panels may be selected from among the M panels. In this case, the total number C of panel group candidates may be represented as C(M,X), where M represents the total number of panels and X represents the number of panels per panel group.

In addition, the number of panel groups that can be selected is not limited to one, and any number (several) of two or more panel groups may be selected.

In the multi-TRP TDM PUSCH repeat transmission, dynamic switching of panel/TRP order may be supported. For example, in a multi-TRP TDM PUSCH repeat transmission using X panels (panels #1 to #X), the first PUSCH repeat transmission may be associated with at least one of panels #1 to #X.

(2-1-4)
- Multi-TRP TDM PUSCH repeated transmission utilizing all M panels.

Different PUSCH repeat transmissions may be sent from different panels to different TRPs.

In the multi-TRP TDM PUSCH repeat transmission, dynamic switching of panel/TRP order may be supported. For example, in a multi-TRP TDM PUSCH repeat transmission using M panels (panels #1 to #M), the first PUSCH repeat transmission may be associated with at least one of panels #1 to #M.

According to embodiment 2-1, in PUSCH repeated transmission using TDM, it is possible to appropriately distinguish between UL transmission schemes for each specific case.

<<Embodiment 2-2>>
The embodiment 2-2 relates to simultaneous multi-panel PUSCH transmission using SDM.

In single DCI-based multi-TRP, when simultaneous multi-panel PUSCH transmission with SDM (single DCI multi-TRP STxMP SDM PUSCH scheme) is enabled by specific higher layer signaling, the UE may be instructed to dynamically switch between the following UL transmission schemes (2-2-1 to 2-2-4) between M (M>2) panels.

(2-2-1)
- Single TRP single panel PUSCH transmission using one of M panels.

The one panel may be any panel selected from the M number of panels. Furthermore, it is not limited to one panel, and several (multiple) panels may be selected from the M number of panels.

(2-2-2)
- Single DCI multi-TRP STxMP SDM PUSCH transmission using two panels out of M panels.

Different layers of a PUSCH may be transmitted from different panels to different TRPs. The two panels may be any pair of panels (which may be called a panel group) selected from M panels. In this case, the total number C of candidates for the panel group may be represented as C(M, 2), where M represents the total number of panels and 2 represents the number of panels per panel group.

In addition, the number of panel groups that can be selected is not limited to one, and any number (several) of panel groups greater than or equal to two may be selected.

(2-2-3)
- Single DCI multi-TRP STxMP SDM PUSCH transmission using X panels (2<X<M) out of M panels.

Different layers of a PUSCH may be transmitted from different panels to different TRPs. The X panels may be any panel group (which may be called a panel group) selected from among the M panels. That is, any panel group including X panels may be selected from among the M panels. In this case, the total number C of panel group candidates may be represented as C(M,X), where M represents the total number of panels and X represents the number of panels per panel group.

In addition, the number of panel groups that can be selected is not limited to one, and any number (several) of panel groups greater than or equal to two may be selected.

(2-2-4)
- Single DCI multi-TRP STxMP SDM PUSCH transmission utilizing all M panels.

Different layers of a PUSCH may be transmitted from different panels to different TRPs.

According to embodiment 2-2, in simultaneous multi-panel PUSCH transmission using SDM, it is possible to appropriately distinguish between UL transmission schemes for each specific case.

<<Embodiment 2-3>>
Embodiment 2-3 relates to simultaneous multi-panel PUSCH transmission using SFM.

In single DCI-based multi-TRP, when simultaneous multi-panel PUSCH transmission with SFN (single DCI multi-TRP STxMP SFN PUSCH scheme) is enabled by specific higher layer signaling, the UE may be instructed to dynamically switch between the following UL transmission schemes (2-3-1 to 2-3-4) between M (M>2) panels.

(2-3-1)
- Single TRP single panel PUSCH transmission using one of M panels.

The one panel may be any panel selected from the M number of panels. Furthermore, it is not limited to one panel, and several (multiple) panels may be selected from the M number of panels.

(2-3-2)
- Single DCI multi-TRP STxMP SFN PUSCH transmission using two panels out of M panels.

All layers of a PUSCH may be transmitted from two panels. The two panels may be any pair of panels (which may be called a panel group) selected from M panels. In this case, the total number C of panel group candidates may be represented as C(M, 2), where M represents the total number of panels and 2 represents the number of panels per panel group.

In addition, the number of panel groups that can be selected is not limited to one, and any number (several) of two or more panel groups may be selected.

(2-3-3)
- Single DCI multi-TRP STxMP SFN PUSCH transmission using X panels (2<X<M) out of M panels.

All layers of a PUSCH may be transmitted from X panels. The X panels may be any panel group (which may be called a panel group) selected from M panels. That is, any panel group including X panels may be selected from M panels. In this case, the total number C of panel group candidates may be represented as C(M,X), where M represents the total number of panels and X represents the number of panels per panel group.

In addition, the number of panel groups that can be selected is not limited to one, and any number (several) of panel groups greater than or equal to two may be selected.

(2-3-4)
- Single DCI multi-TRP STxMP SFN PUSCH transmission utilizing all M panels.

All layers of a PUSCH may be transmitted from M panels.

According to embodiment 2-3, in simultaneous multi-panel PUSCH transmission using SFN, it is possible to appropriately distinguish the UL transmission scheme for each specific case.

<<Example>>
A specific example of the second embodiment will be described with reference to Fig. 9 to Fig. 14. Although a case where there are three panels (i.e., M=3) will be described in Fig. 9 to Fig. 14, the number of panels is not limited to three. The number of panels may be two or four or more.

"Single TRP Single Panel Transmission"
9A-9C are diagrams showing an example of single TRP single panel transmission. FIG. 9 corresponds to the above-mentioned UL transmission scheme 2-1-1/2-2-1/2-3-1. Also, in FIG. 9, the case where the number of ports of each of the three panels (panels #0 to #2) is 2, 2, and 4 is described, but this is not limited thereto. The number of ports of each panel can be changed as appropriate.

As shown in FIG. 9A, the UE may select panel #0 from among the three panels and perform UL transmission from panel #0 toward TRP #0.

As shown in FIG. 9B, the UE may select panel #1 from among the three panels and perform UL transmission from panel #1 toward TRP #0.

As shown in FIG. 9C, the UE may select panel #2 from the three panels and perform UL transmission from panel #2 toward TRP #1.

The UE may perform UL transmission from panel #0/#1 to TRP #1. The UE may also perform UL transmission from panel #2 to TRP #0.

<<Multi-TRP using two panels, multi-panel transmission>>
Figures 10A-10C show an example of multi-TRP multi-panel transmission using two panels. Figure 10 corresponds to the UL transmission scheme 2-1-2/2-2-2/2-3-2 described above. Also, the number of ports on each panel in Figure 10 is the same as in Figure 9.

As shown in FIG. 10A, the UE may select panels #0 and #1 from among the three panels. The UE may perform UL transmission from panel #0 to TRP #0, and may perform UL transmission from panel #1 to TRP #1.

As shown in FIG. 10B, the UE may select panels #0 and #2 from among the three panels. The UE may perform UL transmission from panel #0 to TRP #0, and UL transmission from panel #2 to TRP #1.

As shown in FIG. 10C, the UE may select panels #1 and #2 from among the three panels. The UE may perform UL transmission from panel #1 to TRP #0, and may perform UL transmission from panel #2 to TRP #1.

The UE may perform UL transmission from panel #0 toward TRP #1. The UE may also perform UL transmission from panel #2 toward TRP #0. In other words, it is preferable that UL transmission from each panel is performed toward a different TRP.

<<Multi-TRP using all three panels (multi-panel transmission)>>
Figure 11 shows an example of multi-TRP multi-panel transmission using three (all) panels. Figure 11 corresponds to the UL transmission scheme 2-1-3/2-2-3/2-3-3/2-1-4/2-2-4/2-3-4 described above. Also, the number of ports on each panel in Figure 10 is the same as in Figure 9.

As shown in FIG. 11, the UE may select panels #0, #1, and #2 (all three panels) from among the three panels. The UE may perform UL transmission from panel #0 to TRP #0, UL transmission from panel #1 to TRP #1, and UL transmission from panel #2 to TRP #2.

The UE may perform UL transmission from panel #0 toward TRP #1/#2. The UE may also perform UL transmission from panel #1 toward TRP #0/#2. The UE may also perform UL transmission from panel #2 toward TRP #0/#1. In other words, it is preferable that UL transmission from each panel is performed toward a different TRP.

<UL transmission scheme pattern>
A pattern of a UL transmission scheme that supports dynamic switching will be described with reference to Figures 12 to 14. Although a case of three panels (panels #1 to #3) is illustrated in Figures 12 to 14, the number of panels is not limited to this and can be changed as appropriate. Also, although panel indexes (IDs) are shown as #1 to #3 in Figures 12 to 14, the panel indexes may be read as #0 to #2.

12 is a diagram showing a pattern of a UL transmission scheme using TDM. As shown in FIG. 12, the UL transmission scheme using TDM can be exemplified by the following patterns:
- Single TRP single panel transmission using one panel #1/#2/#3.
- Multi-TRP multi-panel TDM repeat transmission using two panels #1 and #2 (the first repeat transmission is associated with panel #1/#2).
- Multi-TRP multi-panel TDM repeat transmission using two panels #1 and #3 (the first repeat transmission is associated with panel #1/#3).
- Multi-TRP multi-panel TDM repeat transmission using two panels #2 and #3 (the first repeat transmission is associated with panel #2/#3).
- Multi-TRP multi-panel TDM repeat transmission using three panels #1 to #3 (the first repeat transmission is associated with panel #1/#2/#3).

All of the UL transmission schemes shown in FIG. 12 may not be supported, and only a subset of the schemes shown in FIG. 12 may be supported.

13 is a diagram showing a pattern of a UL transmission scheme using SDM. As shown in FIG. 13, the UL transmission scheme using SDM can be exemplified by the following patterns:
- Single panel transmission using one panel #1/#2/#3.
-STxMP SDM transmission using two panels #1 and #2.
-STxMP SDM transmission using two panels #1 and #3.
-STxMP SDM transmission using two panels #2 and #3.
-STxMP SDM transmission using three panels #1 to #3.

All of the UL transmission schemes shown in FIG. 13 may not be supported, and only a subset of the schemes shown in FIG. 13 may be supported.

14 is a diagram showing a pattern of a UL transmission scheme using SFN. As shown in FIG. 14, the UL transmission scheme using SFN can be exemplified by the following patterns:
- Single panel transmission using one panel #1/#2/#3.
-STxMP SFN transmission using two panels #1 and #2.
-STxMP SFN transmission using two panels #1 and #3.
-STxMP SFN transmission using two panels #2 and #3.
-STxMP SFN transmission using three panels #1 to #3.

All of the UL transmission schemes shown in FIG. 14 may not be supported, and only a subset of FIG. 14 may be supported.

According to the second embodiment described above, UL transmission schemes to which multiple panels are applied can be clearly distinguished/classified.

Third Embodiment
The third embodiment describes a method for switching UL transmission schemes to which multiple panels are applied, with respect to the above-mentioned problem 1. The third embodiment illustrates dynamic switching between panels in a case where the number of panels M is greater than 2 (e.g., 3). The numbers of panels/TRP/SRS ports described below are merely examples and can be changed as appropriate.

The third embodiment is broadly divided into embodiments 3-1 to 3-3. Each of the embodiments 3-1 to 3-3 may be applied alone or in combination.

<<Embodiment 3-1>>
One SRS resource set can apply different parameters (eg, number of SRS ports, other panel-specific parameters, etc.) to different panels based on dynamic instructions from the network (NW).

One SRS resource set may be semi-statically configured with a set of multiple parameters (e.g., number of SRS ports, other panel-specific parameters, etc.) for multiple panels. In this case, the NW may dynamically instruct/update the association between the SRS resource set and the panel. The UE may apply the updated set of parameters to one SRS resource set based on the instruction.

Furthermore, the parameters of one SRS resource may be dynamically instructed/updated by the NW.

<<Example>>
Fig. 15 is a diagram showing an example of panel switching according to embodiment 3-1. As shown in Fig. 15, before panel switching, the number of SRS ports of each of the three panels (panels #0 to #2) is 2, 2, and 4. The UE performs UL transmission from panel #0 to TRP #0, and performs UL transmission from panel #1 to TRP #1.

Here, SRS resource set #0 is associated/configured with two SRS resources (two SRS ports) as the above-mentioned parameters. SRS resource set #0 is also associated with panel #0.

Similarly, SRS resource set #1 is associated/configured with two SRS resources (two SRS ports) as parameters. SRS resource set #1 is also associated with panel #1.

For example, the UE may receive an instruction for panel switching (switching from panel #1 to panel #2) from the NW. Based on the instruction, the UE may update the number of SRS ports in SRS resource set #1 from 2 to 4. The UE may also apply the updated SRS resource set #1 (number of SRS ports) and update the association between the SRS resource set #1 and the panel from panel #1 to panel #2.

Based on the updated association between SRS resource set #1 and panel #2, after panel switching, the UE may perform UL transmission from panel #2 to TRP #1.

In this way, in embodiment 3-1 shown in FIG. 15, when switching panels, the index of the SRS resource set is maintained as is, but the parameters corresponding to that SRS resource set are updated, and the panel is switched to that associated with that SRS resource set.

Notes:
In embodiment 3-1, in single DCI multi-TRP TDM PUSCH repeated transmission/single DCI multi-TRP STxMP SDM PUSCH transmission/single DCI multi-TRP STxMP SFN PUSCH transmission, two CB/NCB SRS resource sets may be configured to support two panels/TRPs.

Also, in single DCI multi-TRP TDM PUSCH repeated transmission/single DCI multi-TRP STxMP SDM PUSCH transmission/single DCI multi-TRP STxMP SFN PUSCH transmission, an SRS resource set of X CBs/NCBs may be configured to support X panels/TRPs, which is greater than 2.

In this disclosure, a single DCI multi-TRP TDM PUSCH repeat transmission utilizing X panels/TRPs may mean that multiple repeat transmissions are associated with X panels/TRPs, with different repeat transmissions associated with different panels/TRPs.

In this disclosure, single DCI multi-TRP STxMP SDM may mean that multiple layers of one PUSCH are associated with X panels/TRPs, with different layers associated with different panels/TRPs.

In this disclosure, single DCI multi-TRP STxMP SFN may mean that all layers of one PUSCH are associated with X panels/TRPs.

《Embodiment 3-2》

In embodiment 3-2, M CB/NCB SRS resource sets may be configured. Each SRS resource set may correspond to a panel. To indicate dynamic switching between the above-mentioned UL transmission schemes, an SRS resource set indicator field (which may be referred to as a field/specific field) may be used. The specific field may be included in, for example, a DCI and may indicate at least one of the following options 1 to 4. The following options 1 to 4 may mean that an association between a PUSCH transmission and a certain SRS resource set is indicated.

In this disclosure, "associating a PUSCH transmission with a certain SRS resource set" and "selecting a certain SRS resource set/SRS resource" may be interpreted as interchangeable.

Option 1
A PUSCH transmission may be associated with one SRS resource set selected from the M SRS resource sets. The selected one SRS resource set may be any SRS resource set among the M SRS resource sets. Also, the selected SRS resource set is not limited to one, and may be several SRS resource sets.

Option 2
A PUSCH transmission may be associated with two SRS resource sets selected from among the M SRS resource sets. The two SRS resource sets may be any pair of SRS resource sets (which may be referred to as an SRS resource set group) selected from among the M SRS resource sets. In this case, the total number C of candidates for the SRS resource set group may be represented as C(M, 2), where M may represent the total number of SRS resource sets and 2 may represent the number of SRS resource sets per SRS resource set group.

In addition, the number of SRS resource set groups that can be selected is not limited to one, and any number (several) of two or more SRS resource set groups may be selected.

Also, in a multi-TRP TDM PUSCH repeat transmission, the SRS resource set indicator field may indicate which SRS resource set the first repeat transmission is associated with.

Option 3
A PUSCH transmission may be associated with X (2<X<M) SRS resource sets selected from among the M SRS resource sets. The X SRS resource sets may be any SRS resource set group (which may be referred to as an SRS resource set group) selected from among the M SRS resource sets. In this case, the total number C of candidates for the SRS resource set group may be represented as C(M,X), where M may represent the total number of SRS resource sets and X may represent the number of SRS resource sets per SRS resource set group.

In addition, the number of SRS resource set groups that can be selected is not limited to one, and any number (several) of two or more SRS resource set groups may be selected.

Also, in a multi-TRP TDM PUSCH repeat transmission, the SRS resource set indicator field may indicate which SRS resource set the first repeat transmission is associated with.

Option 4:
A PUSCH transmission may be associated with all M SRS resource sets.

Also, in a multi-TRP TDM PUSCH repeat transmission, the SRS resource set indicator field may indicate which SRS resource set the first repeat transmission is associated with.

<<Variation>>
The above-mentioned selection of the SRS resource set may be set/instructed by upper layer signaling (e.g., RRC/MAC CE). Specifically, first, the SRS resource sets of L CB/NCB may be set by RRC, and M SRS resource sets may be specified/selected from the L SRS resource sets by MAC CE. Here, M may be an integer of 2 or more, and L may be an integer of M or more. In this way, by gradually narrowing down the number of SRS resource sets (SRS resources) to be selected by upper layer signaling, the UE can appropriately select the SRS resource set (SRS resource), and further, it is possible to reduce the processing load of the UE/NW.

<<Example>>
Fig. 16 is a diagram showing an example of panel switching according to embodiment 3-2. As shown in Fig. 16, before panel switching, the number of SRS ports of each of the three panels (panels #0 to #2) is 2, 2, and 4. The UE performs UL transmission from panel #0 to TRP #0, and performs UL transmission from panel #1 to TRP #1.

Here, SRS resource set #0 is associated/configured with two SRS resources (two SRS ports) as the above-mentioned parameters. SRS resource set #0 is also associated with panel #0.

Similarly, SRS resource set #1 is associated/configured with two SRS resources (two SRS ports) as parameters. SRS resource set #1 is also associated with panel #1.

For example, the UE may receive an instruction for panel switching (switching from panel #1 to panel #2) from the NW. Based on the instruction, the UE may switch the SRS resource set from SRS resource set #1 to SRS resource set #2. Here, SRS resource set #2 may be associated with panel #2.

After the panel switching, the UE may perform UL transmission from panel #2 to TRP #1 based on the association between the switched SRS resource set #2 and panel #2.

In this way, embodiment 3-2 shown in FIG. 16 shows an example in which panel switching is achieved by switching SRS resource set #1 corresponding to panel #1 before switching to SRS resource set #2 corresponding to panel #2 at the switching destination.

FIGS. 17 to 19 are diagrams showing examples of patterns/combinations of PUSCH transmission schemes indicated by specific code points in the SRS resource set indicator field according to embodiment 3-2. The correspondence (combination) of the code points and UL transmission schemes shown in FIG. 17 to FIG. 19 may be changed (rearranged). Also, the 1st/2nd/3rd/4th SRS resource sets may be rearranged based on the order of the SRS resource sets. Also, it is not necessary for all of the specific PUSCH (UL) transmission schemes shown in FIG. 17 to FIG. 19 to be supported, and only a part of each of the diagrams may be supported.

FIG. 17 shows an example in which at least one of three SRS resource sets (1st/2nd/3rd) is associated with a PUSCH transmission. A specific code point may indicate the association of a specific PUSCH transmission with an SRS resource set using a 3-bit field value.

For example, code points 000/001/010 may indicate that the PUSCH transmission is associated with one of three SRS resource sets. Code points 011/100/101/110 may indicate that the PUSCH transmission is associated with two of three SRS resource sets. The remaining code point 111 may be reserved.

FIG. 18 shows an example in which at least one of four SRS resource sets (1st/2nd/3rd/4th) is associated with a PUSCH transmission. A specific code point may indicate the association of a specific PUSCH transmission with an SRS resource set using a value from 0 to 15.

For example, code points 0-3 may indicate that the PUSCH transmission is associated with one of four SRS resource sets. Code points 4-9 may indicate that the PUSCH transmission is associated with two of four SRS resource sets. Code points 10-13 may indicate that the PUSCH transmission is associated with three of four SRS resource sets. Code point 14 may indicate that the PUSCH transmission is associated with four SRS resource sets. The remaining code point 15 may be Reserved.

FIG. 19 shows an example in which at least one of three SRS resource sets (1st/2nd/3rd) is associated with a PUSCH transmission (e.g., PUSCH repeated transmission using TDM). A specific code point may indicate an association between a specific PUSCH transmission and an SRS resource set using a value from 0 to 15.

For example, code points 0-2 may indicate that the PUSCH transmission is associated with one of three SRS resource sets. Code points 3-8 may indicate that the PUSCH transmission is associated with two of three SRS resource sets, with the first repeat transmission associated with one of the two. Code points 9-11 may indicate that the PUSCH transmission scheme is associated with three SRS resource sets, with the first repeat transmission associated with one of the three. The remaining code points 12-15 may be reserved.

<<Embodiment 3-3>>
Embodiment 3-3 may be applied only to the CB's PUSH and may not be applied to the NCB's PUSH.

In embodiment 3-3, a case is assumed in which M panels are divided into N groups (N may be equal to or less than M). Panels in the same group may have the same capabilities. That is, panels belonging to the same group may form symmetrical panels. Also, different groups may have different capabilities. That is, panels across groups may form asymmetrical panels.

Furthermore, N CB/NCB SRS resource sets corresponding to the number of divided groups may be set. Each SRS resource set may correspond to a panel group (panel group) having the same capabilities. In other words, the above-mentioned groups and panel groups may be read as interchangeable.

As mentioned above, the SRS resource set indicator field (which may also be referred to as a field/specific field) may be utilized to indicate dynamic switching between UL transmission schemes. The SRS resource set indicator field may be included in the DCI, for example, and may indicate at least one of the following options 1 to 6. The following options 1 to 6 may mean that an association between a PUSCH transmission and a certain SRS resource set (SRS resource) is indicated.

In this disclosure, "associating a PUSCH transmission with a certain SRS resource set" and "selecting a certain SRS resource set/SRS resource" may be interpreted as interchangeable.

Option 1
A PUSCH transmission may be associated with one SRS resource included in one SRS resource set selected from the N SRS resource sets. The one SRS resource may be arbitrarily selected from the selected one SRS resource set. Option 1 (PUSCH transmission is associated with one SRS resource included in one SRS resource set) may refer to a single panel transmission.

Option 2
A PUSCH transmission may be associated with two SRS resources included in one SRS resource set selected from N SRS resource sets. In this case, the two SRS resources may have the same capability since they may be selected from the same (single) SRS resource set. That is, option 2 (PUSCH transmission is associated with two SRS resources included in one SRS resource set) may mean a multi-panel transmission utilizing two panels (symmetric panels) with the same capability.

Option 3
A PUSCH transmission may be associated with X SRS resource sets (X is greater than 2) in one SRS resource set selected from N SRS resource sets. In this case, the X SRS resources may have the same capability since they may be selected from the same (single) SRS resource set. That is, option 3 (PUSCH transmission is associated with X SRS resources in one SRS resource set) may mean a multi-panel transmission utilizing X panels (symmetric panels) with the same capability.

Option 4:
A PUSCH transmission may be associated with two SRS resource sets selected from the N SRS resource sets, where the two SRS resource sets may have different capabilities. That is, option 4 (PUSCH transmission is associated with two SRS resource sets) may refer to a multi-panel transmission utilizing two panels with different capabilities (asymmetric panels).

Option 5:
A PUSCH transmission may be associated with X (2<X<N) SRS resource sets selected from N SRS resource sets, where the X SRS resource sets may have different capabilities. That is, option 5 (PUSCH transmission is associated with X SRS resource sets) may refer to a multi-panel transmission utilizing X (2 or more) panels (asymmetric panels) with different capabilities.

Option 6:
A PUSCH transmission may be associated with all N SRS resource sets, where the N SRS resource sets may have different capabilities, i.e., option 6 (PUSCH transmission is associated with all N SRS resource sets) may refer to a multi-panel transmission utilizing N panels with different capabilities (asymmetric panels).

<<Variation>>
The above-mentioned selection of the SRS resource set/SRS resource may be set/instructed by upper layer signaling (e.g., RRC/MAC CE). Specifically, first, the SRS resource set of L CB/NCB may be set by RRC, and N SRS resource sets may be specified/selected from the L SRS resource sets by MAC CE. Furthermore, X SRS resources may be set/instructed from the N SRS resource sets by upper layer signaling/physical layer signaling (e.g., DCI). In this way, by gradually narrowing down the number of SRS resource sets (SRS resources) to be selected by upper layer signaling/physical layer signaling, the UE can appropriately select the SRS resource set (SRS resource), and further, it is possible to reduce the processing load of the UE/NW.

<<Example>>
Fig. 20 is a diagram showing an example of panel switching according to embodiment 3-3. As shown in Fig. 20, before panel switching, the number of SRS ports of each of the three panels (panels #0 to #2) is 2, 2, and 4. The UE performs UL transmission from panel #0 to TRP #0, and performs UL transmission from panel #1 to TRP #1.

Here, SRS resource set #0 is associated/contains two SRS resources (SRS resources #0, #1) with two ports (having two SRS ports). SRS resource #0 is associated with panel #0, and SRS resource #1 is associated with panel #1. In this case, panels #0 and #1 may belong to the same panel group, i.e., panels #0 and #1 may constitute symmetric panels with the same capabilities.

For example, the UE may receive an instruction for panel switching (switching from panel #1 to panel #2) from the NW. The UE may switch the SRS resource set/SRS resource based on the instruction.

Specifically, SRS resource set #0 may be associated with/include only one SRS resource having two ports. This SRS resource (SRS resource set #0) may be associated with panel #0. Also, SRS resource set #1 may be associated with/include only one SRS resource having four ports. This SRS resource (SRS resource set #1) may be associated with panel #2. Here, panels #0 and #2 may constitute asymmetric panels with different capabilities.

After the panel switching, the UE may perform UL transmission from panel #2 to TRP #1 based on the association between the switched SRS resource set #1 and panel #2.

In this way, embodiment 3-3 shown in FIG. 20 shows an example of achieving panel switching by switching SRS resource set #0 (2-port SRS resource #1) corresponding to panel #1 before switching to SRS resource set #2 (4-port SRS resource) corresponding to panel #2 at the switching destination.

FIGS. 21 and 22 are diagrams showing examples of patterns/combinations of PUSCH transmission schemes indicated by specific code points in the SRS resource set indicator field according to embodiment 3-3. Note that the correspondence (combination) between the code points and the UL transmission schemes shown in FIG. 21 and FIG. 22 may be changed (rearranged). Also, the 1st/2nd of the SRS resource set may be rearranged based on the order of the SRS resource sets. Also, it is not necessary for all of the specific PUSCH (UL) transmission schemes shown in FIG. 21 and FIG. 22 to be supported, and only a part of each of the diagrams may be supported.

FIG. 21 shows an example where the number of panels is three and at least one of the two SRS resource sets (1st/2nd) is associated with a PUSCH transmission. The first SRS resource set may be associated with the two panels, and the second resource set may be associated with the other panel. A particular code point may indicate the association of a particular PUSCH transmission with an SRS resource set in a 2-bit field value.

For example, code point 00/01 may indicate that the PUSCH transmission is associated with one SRS resource selected from the first/second SRS resource set. Code point 10 may indicate that the PUSCH transmission is associated with two SRS resources selected from the first SRS resource set. Code point 11 may indicate that the PUSCH transmission is associated with the first and second SRS resource sets.

FIG. 22 shows an example where the number of panels is four and at least one of the two SRS resource sets (1st/2nd) is associated with a PUSCH transmission. The first SRS resource set may be associated with the two panels, and the second resource set may be associated with the other two panels. A specific code point may indicate the association of a specific PUSCH transmission with an SRS resource set in a 3-bit field value.

For example, code points 000/001 may indicate that the PUSCH transmission is associated with one SRS resource selected from the first/second SRS resource set. Code points 010/011 may indicate that the PUSCH transmission is associated with two SRS resources selected from the first/second SRS resource set. Code point 101 may indicate that the PUSCH transmission is associated with the first and second SRS resource sets. The extra code points 110/111 may be reserved.

As shown in Figures 21 and 22, the number of bits for panel switching instructions (in the SRS resource set indicator field) may be increased or decreased depending on the number of panels/number of SRS resource sets, etc.

<<Embodiment 3-4>>
Embodiments 3-4 may be applied only to the PUSH of the CB, and may not be applied to the PUSH of the NCB.

In embodiments 3-4, a case is assumed in which M panels are divided into N groups (N may be equal to or less than M). Panels in the same group may have the same capabilities. That is, panels belonging to the same group may form symmetrical panels. Also, different groups may have different capabilities. That is, panels across groups may form asymmetrical panels.

Furthermore, N CB/NCB SRS resource sets corresponding to the number of divided groups may be set. Each SRS resource set may correspond to a panel group (panel group) having the same capabilities. In other words, the above-mentioned groups and panel groups may be read as interchangeable.

As mentioned above, the SRS resource set indicator field (which may also be referred to as a field/specific field) may be utilized to indicate dynamic switching between UL transmission schemes. The SRS resource set indicator field may be included in the DCI, for example, and may indicate at least one of the following options 1 to 4. The following options 1 to 4 may mean that an association between a PUSCH transmission and a certain SRS resource set (SRS resource) is indicated.

In this disclosure, "associating a PUSCH transmission with a certain SRS resource set" and "selecting a certain SRS resource set/SRS resource" may be interpreted as interchangeable.

Option 1
A PUSCH transmission may be associated with one SRS resource set selected from the N SRS resource sets, in which case an SRS resource indicator (SRI) may indicate at least one of the following options 1-1 to 1-3.

<Option 1-1>
A PUSCH transmission may be associated with one SRS resource selected from one SRS resource set. Option 1-1 (PUSCH transmission is associated with one SRS resource included in one SRS resource set) may refer to a single panel transmission.

<Option 1-2>
A PUSCH transmission may be associated with two SRS resources selected from one SRS resource set. Option 1-2 (PUSCH transmission is associated with two SRS resources included in one SRS resource set) may refer to a multi-panel transmission utilizing two panels with the same capabilities (symmetric panels).

<Option 1-3>
A PUSCH transmission may be associated with X SRS resources (X is greater than 2) selected from one SRS resource set. Options 1-3 (PUSCH transmission is associated with X SRS resources included in one SRS resource set) may refer to multi-panel transmission utilizing X panels (symmetric panels) with the same capabilities.

Option 2
A PUSCH transmission may be associated with two SRS resource sets selected from among the N SRS resource sets. Option 2 (PUSCH transmission is associated with two SRS resource sets) may refer to a multi-panel transmission utilizing two panels with different capabilities (asymmetric panels).

Option 3
A PUSCH transmission may be associated with X (2<X<N) SRS resource sets selected from among N SRS resource sets. Option 3 (PUSCH transmission is associated with X SRS resource sets) may refer to a multi-panel transmission utilizing X (greater than or equal to 2) panels with different capabilities (asymmetric panels).

Option 4:
A PUSCH transmission may be associated with all N SRS resource sets, where the N SRS resource sets may have different capabilities, i.e., option 6 (PUSCH transmission is associated with all N SRS resource sets) may refer to a multi-panel transmission utilizing N panels with different capabilities (asymmetric panels).

<<Variation>>
The above-mentioned selection of the SRS resource set/SRS resource may be set/instructed by upper layer signaling (e.g., RRC/MAC CE). Specifically, first, the SRS resource set of L CB/NCB may be set by RRC, and N SRS resource sets may be specified/selected from the L SRS resource sets by MAC CE. Furthermore, X SRS resources may be set/instructed from the N SRS resource sets by upper layer signaling/physical layer signaling (e.g., DCI). In this way, by gradually narrowing down the number of SRS resource sets (SRS resources) to be selected by upper layer signaling/physical layer signaling, the UE can appropriately select the SRS resource set (SRS resource), and further, it is possible to reduce the processing load of the UE/NW.

<<Example>>
23A-23B are diagrams showing examples of patterns/combinations of PUSCH transmission schemes indicated by specific code points in the SRS resource set indicator field/SRS resource indicator field according to embodiments 3-4. The correspondence (combination) of the code points and UL transmission schemes shown in FIG. 23A-23B may be changed (rearranged). Also, the 1st/2nd of the SRS resource set may be rearranged based on the order of the SRS resource set. Also, the specific PUSCH (UL) transmission schemes shown in FIG. 23A-23B may not all be supported, and only a part of each of the diagrams may be supported.

Figures 23A and 23B show an example where the number of panels is three and at least one of the two SRS resource sets (1st/2nd) is associated with a PUSCH transmission. Figure 23A corresponds to the SRS resource set indicator field, and Figure 23B corresponds to the SRS resource indicator field (SRI field). The first SRS resource set may be associated with two panels, and the second resource set may be associated with the other panel. A particular code point may indicate the association of a particular PUSCH transmission with an SRS resource set in a 2-bit field value.

In FIG. 23A, for example, code points 00/01 may indicate that a PUSCH transmission is associated with the first/second SRS resource set. Code point 10 may indicate that a PUSCH transmission is associated with the first and second SRS resource sets. The redundant code point 11 may be reserved.

In FIG. 23B, for example, code points 00/01 may indicate that the PUSCH transmission is associated with the first/second SRS resource selected from the first SRS resource set. Code point 10 may indicate that the PUSCH transmission is associated with two (first and second) SRS resources selected from the first SRS resource set. The redundant code point 11 may be reserved.

According to the third embodiment described above, the UE can realize panel switching according to a plurality of cases in which a plurality of panels are applied.
can be clearly distinguished/classified.

Fourth Embodiment
The fourth embodiment relates to problem 2 above and describes a DCI field (SRI field/TPMI field) for dynamic indication of panel switching.

In repeated transmissions using TDM in a single DCI-based multi-TRP and STxMP using SDM/SFN in a single DCI-based multi-TRP, dynamic switching between UL transmissions using X panels/TRPs (X is 2 or more) and UL transmissions using a single panel/TRP may be supported. For example, UL transmissions using X panels/TRPs may be indicated by (the SRI field/TPMI field contained in) a DCI that schedules the UL transmission. Specific cases that can be supported include the following cases 1 to 3.

Case 1
If UL transmission with X panels/TRPs is indicated and an SRI/TPMI field is indicated in the DCI, each field may be associated with one SRS resource set/SRI resource.

Case 2
When UL transmission by Y panels/TRPs (1<Y<X: X is greater than 2) is indicated, it can be further classified into the following options 1 to 3.
(Option 1)
The DCI may have X SRI/TPMI fields depending on the maximum number of panels, and Y (e.g., the first Y) SSRI/TPMI fields may be applied among the X SRI/TPMI fields. In this case, each field may be associated with one SRS resource set/SRI resource. The remaining fields may be reserved.
(Option 2)
The DCI may have Y SRI/TPMI fields, which may be selected from among X SRI/TPMI fields, where each field may be associated with one SRS resource set/SRI resource.
(Option 3)
The DCI may have X SRI/TPMI fields depending on the maximum number of panels, for example. Some of the X SRI/TPMI fields may be jointly interpreted/concatenated. Thus, the X fields may be reinterpreted as Y fields. Each field may be associated with one SRS resource set/SRI resource.

Case 3
When UL transmission by a single panel/TRP is indicated, it can be further classified into the following options 1 to 3.
(Option 1)
The DCI may have X SRI/TPMI fields depending on the maximum number of panels, for example. Of the X SRI/TPMI fields, one (e.g., the first one) SSRI/TPMI field may be applied. In this case, each field may be associated with one SRS resource set/SRI resource. The remaining fields may be reserved.
(Option 2)
The DCI may have one SRI/TPMI field, which may be arbitrarily selected from the X SRI/TPMI fields (e.g., may be the first field), and which may be associated with one SRS resource set/SRI resource.
(Option 3)
The DCI may have X SRI/TPMI fields depending on the maximum number of panels, and all/some of the X SRI/TPMI fields may be jointly interpreted/concatenated. Thus, the X fields may be reinterpreted as one field. The one field may be associated with one SRS resource set/SRI resource.

<<Variation>>
Also, an SRI field/TPMI field may be associated with different parameters (panel-specific) by the dynamic instruction of the DCI. For example, there may be cases where an SRI field/TPMI field is associated with different parameters (panel-specific) by the dynamic instruction of the DCI, or where an SRI field/TPMI field is associated with the same SRS resource set/SRS resource, but the SRS resource set/SRS resource may apply different parameters (panel-specific) by the dynamic instruction of the DCI. In these cases, the size of an SRI field/TPMI field may be determined as the maximum size required for the different SRS resource set/SRS resource or the different parameters (panel-specific).

Here, the maximum size may mean the maximum size that realizes all possible combinations of SRS ports across multiple panels/TRPs. For example, consider a case where a UE has four panels, with the number of ports on each panel being 2, 2, 4, and 4. In this case, when two panels are used, the combination of the two panels that results in the maximum total number of ports is 4 + 4 = 8 ports. Therefore, the size of the SRI field/TPMI field in this case may be determined based on 4 + 4 = 8 ports.

Also, in this case, if the UE is dynamically instructed to use two panels corresponding to 2+2=4 ports, some (first/second) SRI/TPMI fields may not be used.

In this way, when the panel is switched between 4+4=8 ports/2+2=4 ports, cases are conceivable where the size of the first/second SRI field/TPMI field may be affected (field size may differ/change) depending on the total number of ports on multiple panels. If the size of the required field differs depending on the panel specified, the UE will need to perform more blind detection to recognize the size of the field.

In this disclosure, assuming such a case, by determining the field size according to the maximum number of ports that can be achieved by combining multiple panels (adopting the maximum size), it is possible to eliminate unnecessary blind detection, reduce the UE load, and reduce DCI overhead.

Also, as described above, in this disclosure, the panel-specific parameters can refer to at least one of the number of SRS ports, the number of SRS resources, the full power mode, and the codebook subset.

As shown in cases 1 to 3 above, when the total number of ports and the size of the SRI field/TPMI field differ depending on the possible combinations of multiple panels, the size of the fields may be determined based on the maximum size in the different cases.

Also, if the size of the DCI becomes smaller after panel switching, the size may be adjusted (aligned) by padding (adding) zeros to the DCI.

According to the fourth embodiment described above, the UE can use DCI to realize panel switching according to multiple cases in which multiple panels are applied.

Fifth embodiment
The fifth embodiment relates to problem 3 above and describes dynamic panel switching in multi-DCI based UL transmission.

As explained in problem 3 above, in multi-DCI based STxMP, CORESETPoolInex#0 (=0) is associated with the SRS resource set of the CB/NCB with a lower ID, and CORESETPoolIndex#1 (=1) is associated with the SRS resource set of the CB/NCB with a higher ID. This association is fixed.

However, in asymmetric panels, to realize panel switching in response to UE movement as in the above-mentioned embodiments, the association between the panel and the TRP needs to be changed. In this case, the fixed correspondence between the CORESETPoolIndex and the SRS resource set described above may affect appropriate panel switching (see, for example, the upper half of Figure 25).

In other words, the association between CORESETPoolIndex and SRS resource set needs to be able to be switched according to panel switching.

Therefore, in the fifth embodiment, switching of the association between CORESETPoolIndex and an SRS resource set will be described. Note that in the fifth embodiment, STxMP is exemplified as UL transmission, but this is not limited thereto, and it is also possible to apply it to other UL transmissions.

For example, in multi-DCI-based UL transmission (STxMP), when UL transmission is scheduled by DCI associated with CORESETPoolIndex, the UE may be dynamically instructed to perform single-panel UL transmission (e.g., PUSCH transmission) using any one of M panels (M is 2 or more). Note that the number of panels that can be selected from the M panels is not limited to one, and may be several.

FIG. 24A-FIG. 24B are diagrams showing UL transmission scheme patterns for each CORESETPoolIndex in the fifth embodiment.

As shown in FIG. 24A, UL transmissions scheduled by DCI associated with CORESETPoolIndex#0 (=0) may support dynamic switching between single panel transmissions using panels #1/#2.

As shown in FIG. 24B, UL transmissions scheduled by DCI associated with CORESETPoolIndex#1 (=1) may support dynamic switching between single panel transmissions using panels #1/#2.

<<Embodiment 5-1>>
Embodiment 5-1 relates to a case in which two CB/NCB SRS resource sets are configured in multi-DCI-based STxMP.

When two CB/NCB SRS resource sets are configured, the first SRS resource set may be associated with CORESETPoolIndex#0, and the second SRS resource set may be associated with CORESETPoolIndex#1. That is, this association may be the same as the fixed association described above.

A single SRS resource set can apply different parameters (e.g., number of SRS ports, other panel-specific parameters, etc.) to different panels based on dynamic instructions from the network (NW).

For example, one SRS resource set may be semi-statically configured with a set of multiple parameters (e.g., number of SRS ports, other panel-specific parameters, etc.) for multiple panels. In this case, the NW may dynamically instruct/update the association between the SRS resource set and the panel. The UE may apply the updated set of parameters to one SRS resource set based on the instruction.

Furthermore, the parameters of one SRS resource may be dynamically instructed/updated by the NW.

<<Example>>
FIG. 25 is a diagram showing an example of panel switching according to embodiment 5-1. As shown in FIG. 25, before panel switching, the number of SRS ports of each of the two panels (panels #0 to #1) is 2 and 4. The UE performs UL transmission from panel #0 to TRP #0, and performs UL transmission from panel #1 to TRP #1. TRP #0 is associated with CORESETPoolIndex #0 (SRS resource set #0), and TRP #1 is associated with CORESETPoolIndex #1 (SRS resource set #1).

Here, SRS resource set #0 is associated/configured with two SRS resources (two SRS ports) as the above-mentioned parameters. SRS resource set #0 is also associated with panel #0.

Similarly, SRS resource set #1 is associated/configured with 4-port SRS resources (4 SRS ports) as parameters. SRS resource set #1 is also associated with panel #1.

For example, the UE may receive an instruction for panel switching (switching between panels #0 and #1) from the NW. Based on the instruction, the UE may update the number of SRS ports in SRS resource set #0 from 2 to 4, and update the number of SRS ports in SRS resource set #1 from 4 to 2.

The UE may also apply the updated SRS resource set #0 (number of SRS ports) and update the association between the SRS resource set #0 and the panel from panel #0 to panel #1. Similarly, the UE may apply the updated SRS resource set #1 (number of SRS ports) and update the association between the SRS resource set #1 and the panel from panel #1 to panel #0.

Based on the updated association between SRS resource set #0 and panel #1, and the updated association between SRS resource set #1 and panel #0, after panel switching, the UE may perform UL transmission from panel #1 to TRP #0 and from panel #0 to TRP #1.

In this way, in embodiment 5-1 shown in FIG. 25, when switching panels, the association between CORESETPoolIndex and TRP is maintained as is, but the parameters corresponding to the SRS resource set are updated, and the panel associated with that SRS resource set is switched.

<<Embodiment 5-2>>
Embodiment 5-2 relates to a case in which M (M is 2 or more) CB/NCB SRS resource sets are configured in multi-DCI-based STxMP.

When M CB/NCB SRS resource sets are configured, an SRS resource set indicator field (which may be another field/new field) may be used to indicate dynamic switching between multiple panels. The SRS resource set indicator field may indicate a PUSCH transmission associated with one SRS resource set selected from the M SRS resource sets. The one SRS resource set selected may be any one SRS resource set among the M SRS resource sets. Also, the selected SRS resource set is not limited to one, and may be several SRS resource sets.

<<Example>>
26A-26B are diagrams showing examples of patterns/combinations of PUSCH transmission schemes indicated by specific code points in the SRS resource set indicator field according to embodiment 5-2. The correspondence (combination) of the code points and UL transmission schemes shown in FIG. 26A-26B may be changed (rearranged). Also, the 1st/2nd/3rd of the SRS resource set may be rearranged based on the order of the SRS resource set. Also, the specific PUSCH (UL) transmission schemes shown in FIG. 26A-26B may not all be supported, and only a part of each of the diagrams may be supported.

FIG. 26A shows an example in which one of two SRS resource sets (1st/2nd) is associated with a PUSCH transmission. Specifically, code points 0-1 may indicate that a PUSCH transmission is associated with the first/second SRS resource set.

FIG. 26B shows an example in which one of three SRS resource sets (1st/2nd/3rd) is associated with a PUSCH transmission. Specifically, code points 0 to 2 may indicate that the PUSCH transmission is associated with the first/second/third SRS resource set. The remaining code point 3 may be reserved.

<<Embodiment 5-3>>
The embodiment 5-3 relates to panel switching using MAC CE in multi-DCI-based STxMP.

In the case of multi-DCI, it is assumed that the panel will be switched as the UE rotates. In this case, the speed of panel switching can be an issue. For example, the base station (gNB) may be able to recognize the UE rotation based on the beam report regarding L1-RSRP/SINR. However, the base station requires a certain amount of time (e.g., several milliseconds) to recognize the UE rotation.

In addition, if the backhaul between multiple TRPs is not ideal, when one TRP uses DCI to instruct panel switching, it is expected that it will take time for other base stations to recognize the instruction via the backhaul.

In consideration of the UE/gNB processing time required for panel switching, we propose MAC CE-based panel switching/activation.

In embodiment 5-3, as in embodiment 5-2, M (M is 2 or more) CB/NCB SRS resource sets may be configured. Here, the association between the SRS resource set and the CORESETPoolIndex may be indicated by the MAC CE.

(Option 1)
The MAC CE may include a field indicating a CORESETPoolIndex and an SRS resource set indicator field associated with the CORESETPoolIndex. The MAC CE may also include a field indicating multiple CORESETPoolIndexes and multiple SRS resource set indicator fields associated with each of the multiple CORESETPoolIndexes.

(Option 2)
The MAC CE may not include a CORESETPoolIndex. In this case, the MAC CE may include multiple SRS resource set indicator fields associated with the CORESETPoolIndex. Each SRS resource set indicated by the MAC CE may be associated with one CORESETPoolIndex. For example, the first field of the SRS resource set indicator may correspond to CORESETPoolIndex#0, and the second field may correspond to CORESETPoolIndex#1.

<<Variation>>
The value (#0/#1) of CORESETPoolIndex may be updated for each SRS resource set by the MAC CE. Alternatively, the value (#0/#1) of CORESETPoolIndex may be set for each SRS resource set by the RRC first, and a specific CORESETPoolIndex may be activated/deactivated for each SRS resource set by the MAC CE.

According to embodiment 5-3, the MAC CE can be used to flexibly switch the corresponding CORESETPoolIndex for each SRS resource set.

According to the fifth embodiment described above, the UE can realize dynamic panel switching in multi-DCI-based UL transmission by using DCI/MAC CE.

Sixth Embodiment
The sixth embodiment describes a method for supporting two or more panels in multi-DCI-based UL transmission, in relation to the above-mentioned problem 4. In the sixth embodiment, STxMP is exemplified as UL transmission, but the present invention is not limited thereto and can be applied to other UL transmissions.

In multi-DCI based UL transmission, to support two or more panels, at least one of the following options 1-2 may be applied.

Option 1
X (X is greater than 2) CORESETPoolIndex may be configured. Each CORESETPoolIndex may be associated with one SRS resource set. A PUSCH scheduled by a DCI associated with a certain CORESETPoolIndex may be associated with one SRS resource set and one panel.

(Option 1-1)
An SRS resource set of X CBs/NCBs may be set. The association between CORESETPoolIndex and the SRS resource set may be set statically or semi-statically. For example, dynamic panel switching may be supported by applying the above-mentioned embodiment 5-1.

In addition, the association between CORESETPoolIndex and SRS resource sets may be based on the order of CORESETPoolIndex and the order of SRS resource set indicators.

(Option 1-2)
M (M is equal to or greater than X) SRS resource sets of CB/NCB may be configured. The associated SRS resource set may be dynamically indicated by the SRS resource set indicator field (including the DCI/MAC CE) in the same manner as in embodiment 5-2/5-3 in order to support dynamic panel switching.

Option 2
Similar to Rel. 18, two CORESETPoolIndexes may be configured. Each CORESETPoolIndex may be associated with multiple SRS resource sets. A PUSCH scheduled by a DCI associated with a certain CORESETPoolIndex may be associated with multiple SRS resource sets and multiple panels.

(Option 2-1)
X (X is greater than 2) CB/NCB SRS resource sets may be configured. The association between CORESETPoolIndex and the SRS resource set may be set statically or semi-statically. For example, dynamic panel switching may be supported by applying the above-mentioned embodiment 5-1. In addition, as a variation, whether CORESETPoolIndex is associated with one/multiple SRS resource sets may be set by, for example, upper layer signaling.

In addition, the association between CORESETPoolIndex and SRS resource sets may be based on the order of CORESETPoolIndex and the order of SRS resource set indicators.

(Option 2-2)
M (M is equal to or greater than X) SRS resource sets of CB/NCB may be configured. In order to support dynamic panel switching, one/more associated SRS resource sets may be dynamically indicated by (DCI/MAC CE including) the SRS resource set indicator field, as in the case of embodiment 5-2/5-3. In option 2-2, multiple SRS resource sets may be indicated/associated with one CORESETPoolIndex.

<<Variation>>
Whether a CORESETPoolIndex is associated with one/multiple SRS resource sets may be semi-statically configured, for example, by higher layer signaling.

<<Example>>
Fig. 27 is a diagram showing an example of a scenario supporting multiple panels according to the sixth embodiment, which corresponds to the above-mentioned option 1 and shows an example in which a UE uses three panels for UL transmission to three TRPs.

As shown in Figure 27, the number of SRS ports on each of the three panels (panels #0 to #2) is 2, 2, and 4. Panels #0 to #2 are associated with SRS resource sets #0 to #2, respectively.

TRP#0 to #2 are associated with CORESETPoolIndex#0/#1/#2 respectively.

The UE performs UL transmission from panel #0 to TRP #0, UL transmission from panel #1 to TRP #1, and UL transmission from panel #2 to TRP #2.

FIG. 28 is a diagram showing another example of a scenario supporting multiple panels according to the sixth embodiment. FIG. 28 corresponds to the above-mentioned option 2, and shows an example in which a UE uses three panels to transmit UL to three TRPs.

As shown in FIG. 28, the number of SRS ports on each of the three panels (panels #0 to #2) is 2, 2, and 4. Panels #0 to #2 are associated with SRS resource sets #0 to #2, respectively.

TRP#0 is associated with CORESETPoolIndex#0. TRP#1/#2 are both associated with CORESETPoolIndex#1.

The UE performs UL transmission from panel #0 to TRP #0, UL transmission from panel #1 to TRP #1, and UL transmission from panel #2 to TRP #2.

According to the sixth embodiment described above, two or more panels can be supported in multi-DCI-based UL transmission.

<Additional Information>
[Notification of information to UE]
In the above-described embodiment, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, any information is received from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

When the above notification is performed by a MAC CE, the MAC CE may be identified by including in the MAC subheader a new Logical Channel ID (LCID) that is not specified in existing standards.

When the notification is made by a DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

Furthermore, notification of any information to the UE in the above-mentioned embodiments may be performed periodically, semi-persistently, or aperiodically.

[Information notification from UE]
In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission/report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

If the notification is made by a MAC CE, the MAC CE may be identified by including a new LCID in the MAC subheader that is not specified in existing standards.

If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

Furthermore, in the above-mentioned embodiments, notification of any information from the UE may be performed periodically, semi-persistently, or aperiodically.

[Application of each embodiment]
At least one of the above-mentioned embodiments may be applied when a certain condition is satisfied, which may be specified in a standard or may be notified to the UE/BS using higher layer signaling/physical layer signaling.

At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

The specific UE capabilities may indicate at least one of the following:
- Supporting specific processing/operations/control/information for at least one of the above embodiments.
Support STxMP (operations/schemes).
Support UL transmission using TDM/SDM/SFN.
Support multiple asymmetric/symmetric panels.
Support single DCI multi-TRP TDM repeat transmission with more than two panels.
Support single DCI multi-TRP STxMP with 2 or more panels.
Support multi-DCI multi-TRP STxMP with 2 or more panels.
Supporting SRS resource sets of two or more CBs/NCBs.
- Supports CORESETPoolIndex of 2 or more.

Furthermore, the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities per frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities per subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities per Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

The above-mentioned specific UE capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).

Furthermore, at least one of the above-mentioned embodiments may be applied when the UE configures/activates/triggers specific information related to the above-mentioned embodiments (or performs the operations of the above-mentioned embodiments) by higher layer signaling/physical layer signaling. For example, the specific information may be information indicating the activation of a specific STxMP scheme, any RRC parameters for a specific release (e.g., Rel. 18/19), etc.

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

(Additional Note)
The following inventions are added regarding one embodiment (first/second embodiment) of the present disclosure.
[Appendix 1]
a receiver for receiving an instruction to switch to an uplink (UL) transmission utilizing a plurality of panels;
a control unit that controls panel switching for the uplink transmission based on the instruction of the switching,
The panels before and after the switch form an asymmetric panel on the terminal.
[Appendix 2]
The terminal of claim 1, wherein the multiple panels constituting the asymmetric panel have different capabilities for at least one of a maximum number of measurement reference signal (SRS) ports, a maximum number of SRS resources, a maximum rank, a full power mode, a codebook subset, and a coherent type.
[Appendix 3]
3. The terminal of claim 1, wherein the UL transmission is either a UL repeated transmission using a single DCI-based time division multiplexing (TDM) and a simultaneous UL transmission using a single DCI-based space division multiplexing (SDM) or a single frequency network (SFN).
[Appendix 4]
4. The terminal according to claim 1, wherein the receiving unit receives the instruction to switch the UL transmission using downlink control information (DCI).

(Additional Note)
The following inventions are added regarding one embodiment (third/fourth embodiment) of the present disclosure.
[Appendix 1]
a receiver for receiving an instruction to switch to an uplink (UL) transmission utilizing a plurality of panels;
a control unit that controls panel switching for the uplink transmission based on the instruction of the switching,
The switching instruction includes information regarding a specific panel and a measurement reference signal (SRS) resource set associated with the specific panel.
[Appendix 2]
The terminal according to claim 1, wherein the control unit updates a specific parameter corresponding to an SRS resource set before switching based on the information.
[Appendix 3]
The terminal according to claim 1 or 2, wherein the control unit switches an SRS resource set corresponding to a panel before switching to an SRS resource set associated with a panel to be switched to, based on the information.
[Appendix 4]
The receiving unit receives an instruction to switch the UL transmission using downlink control information (DCI);
The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the DCI includes an SRS resource indicator field according to a maximum number of panels supported, or a transmit precoding matrix index (TPMI) field.

(Additional Note)
The following inventions are added regarding one embodiment (fifth/sixth embodiment) of the present disclosure.
[Appendix 1]
A receiver for receiving an instruction to switch to a multiple downlink control information (multiple DCI) based uplink (UL) transmission using a plurality of panels;
a control unit that controls panel switching for the uplink transmission based on the instruction of the switching,
The terminal, wherein the switching instruction includes information regarding a specific panel and a transmission/reception point (TRP) associated with the specific panel.
[Appendix 2]
The terminal according to claim 1, wherein the receiving unit receives downlink control information or a MAC control element including the information.
[Appendix 3]
The switching instruction includes information regarding a particular panel and a measurement reference signal (SRS) resource set associated with the particular panel;
The terminal according to claim 1 or 2, wherein the control unit switches an SRS resource set corresponding to a panel before switching to an SRS resource set associated with a panel to be switched to, based on the information.
[Appendix 4]
The information includes a measurement reference signal (SRS) resource set indicator field associated with a particular panel;
4. The terminal of claim 1, wherein the SRS resource set indicator field indicates a particular UL transmission associated with an SRS resource set.

(Wireless communication system)
A 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 embodiments of the present disclosure or a combination of these methods.

FIG. 29 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may simply be referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

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

In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the 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 may support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged within the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple 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 for example, FR1 may correspond to a higher frequency band than FR2.

In addition, the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which corresponds to the upper station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which corresponds to a relay station, may be called an IAB 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 an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.

The core network 30 may include network functions (Network Functions (NF)) such as, for example, a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Note that multiple functions may be provided by one network node. In addition, communication with an external network (e.g., the Internet) may be performed via the DN.

The user terminal 20 may be a terminal that supports at least one of the communication methods such as LTE, LTE-A, and 5G.

In the wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and 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.

The radio access method may also be called a waveform. Note that in the wireless communication system 1, other radio access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL radio access methods.

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

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

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

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

Note that the DCI for scheduling the PDSCH may be called a DL assignment or DL DCI, and the DCI for scheduling the PUSCH may be called a UL grant or UL DCI. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

A control resource set (COntrol REsource SET (CORESET)) and a search space may be used to detect the PDCCH. The CORESET corresponds to the resources to search for DCI. The search space corresponds to the search region and search method of PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor the CORESET associated with a search space based on the search space configuration.

A 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 the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in this disclosure may be read as interchangeable.

The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

Note that in this disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), 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 an SS (PSS, SSS) and a PBCH (and a DMRS for PBCH) may be called an SS/PBCH block, an SS Block (SSB), etc. In addition, the SS, SSB, etc. may also be called a reference signal.

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

(Base station)
30 is a diagram showing an example of a configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

Note that this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the base station 10 may also be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each part 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 are described based on a common understanding in the technical field to which this disclosure pertains.

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

The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.

The transceiver 120 may be configured as an integrated transceiver, or may be composed of a transmitter and a receiver. The transmitter may be composed of a transmission processing unit 1211 and an RF unit 122. The receiver may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

The transmitting/receiving antenna 130 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

The transceiver 120 may form at least one of the transmit beam and receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data and control information obtained from the control unit 110 to generate a bit string to be transmitted.

The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

Note that the transmitting section and receiving section of the base station 10 in this disclosure may be configured with at least one of the transmitting/receiving section 120, the transmitting/receiving antenna 130, and the transmission path interface 140.

The transceiver 120 may transmit a switching instruction for uplink (UL) transmission from a terminal using multiple panels. The transceiver 120 may transmit a switching instruction for multiple downlink control information (multiple DCI)-based uplink (UL) transmission in which a terminal uses multiple panels. The transceiver 120 may receive uplink transmission from the terminal using the panel switched based on the switching instruction.

The control unit 110 may determine panel switching for the uplink transmission based on the switching instruction.

(User terminal)
31 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting/receiving unit 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 the functional blocks of the characteristic parts of this embodiment, and the user terminal 20 may also be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each part 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 are described based on a common understanding in the technical field to which this disclosure pertains.

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

The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.

The transceiver 220 may be configured as an integrated transceiver, or may be composed of a transmitter and a receiver. The transmitter may be composed of a transmission processing unit 2211 and an RF unit 222. The receiver may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

The transmitting/receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

The transceiver 220 (transmission processor 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information acquired from the controller 210, and generate a bit string to be transmitted.

The transceiver 220 (transmission processor 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

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 (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, it is not necessary to perform DFT processing as the above-mentioned transmission processing.

The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

The transceiver 220 (reception processor 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

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

The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may derive interference measurements for CSI calculation based on interference measurement resources. The interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. CSI-IM may be called CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. In this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be read as interchangeable.

In addition, the transmitting unit and receiving unit of the user terminal 20 in this disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.

The transceiver 220 may receive an instruction to switch to uplink (UL) transmission using multiple panels. The transceiver 220 may receive an instruction to switch to uplink (UL) transmission based on multiple downlink control information (multiple DCI) using multiple panels. The transceiver 220 may receive the instruction to switch the UL transmission using downlink control information (DCI) or a MAC control element.

The panels before and after the switching may form an asymmetric panel. The multiple panels forming the asymmetric panel may have different capabilities for at least one of the maximum number of measurement reference signal (SRS) ports, the maximum number of SRS resources, the maximum rank, the full power mode, the codebook subset, and the coherent type. The UL transmission may be either UL repeated transmission using single downlink control information (single DCI) based time division multiplexing (TDM), or simultaneous UL transmission using single downlink control information (single DCI) based space division multiplexing (SDM) or single frequency network (SFN). The switching instruction may include information on a specific panel and a measurement reference signal (SRS) resource set associated with the specific panel. The DCI may include an SRS resource indicator field according to the maximum number of panels supported, or a transmit precoding matrix index (TPMI) field. The switching instruction may include information on a specific panel and a transmit/receive point (TRP) associated with the specific panel. The switching indication may include information regarding a particular panel and a measurement reference signal (SRS) resource set associated with the particular panel. The SRS resource set indicator field may indicate a particular UL transmission associated with an SRS resource set.

The control unit 210 may control the panel switching for the uplink transmission based on the switching instruction. The control unit 210 may update a specific parameter corresponding to the SRS resource set before the switching based on the information. The control unit 210 may switch the SRS resource set corresponding to the panel before the switching to the SRS resource set associated with the panel to which the switching is to be performed based on the information.

(Hardware configuration)
The block diagrams used in the description of the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

Here, the functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the transmission function may be called a transmitting unit, a transmitter, and the like. In either case, as mentioned above, there are no particular limitations on the method of realization.

For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 32 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

In addition, in this disclosure, terms such as apparatus, circuit, device, section, and unit may be interpreted as interchangeable. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figures, or may be configured to exclude some of the devices.

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

The functions of the base station 10 and the user terminal 20 are realized, for example, by loading specific software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of the reading and writing of 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 as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc. For example, at least a portion of the above-mentioned control unit 110 (210), transmission/reception unit 120 (220), etc. may be realized by the processor 1001.

The processor 1001 also reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. The programs used are those that cause a computer to execute at least some of the operations described in the above embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks.

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

Storage 1003 is a computer-readable recording medium and may be composed of at least one of a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004. The transmitting/receiving unit 120 (220) may be implemented as a transmitting unit 120a (220a) and a receiving unit 120b (220b) that are physically or logically separated.

The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., 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 be integrated into one structure (e.g., a touch panel).

Furthermore, each device such as the processor 1001 and 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 between each device.

Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

(Modification)
In addition, the terms described in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may be called a pilot, a pilot signal, or the like depending on the applied standard. A component carrier (CC) may also 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 (e.g., 1 ms) that is independent of numerology.

Here, the numerology may be a communication parameter that is applied to at least one of the transmission and reception of a signal or channel. The numerology may indicate, for example, at least one of the following: SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame configuration, 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 consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.). A slot may also be a time unit based on numerology.

A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

A radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting a signal. A different name may be used for radio frame, subframe, slot, minislot, and symbol. Note that the time units such as frame, subframe, slot, minislot, and symbol in this disclosure may be read as interchangeable.

For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. In other words, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. 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 smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station schedules each user terminal by allocating radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) in TTI units. Note that the definition of TTI is not limited to this.

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

Note that when one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. In addition, the number of slots (minislots) that constitute the minimum time unit of 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 shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

Note that a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

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

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

In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource area of one subcarrier and one symbol.

A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

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

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 the active BWP. Note that "cell," "carrier," etc. in this disclosure may be read as "BWP."

Note that the above-mentioned structures of radio frames, subframes, slots, minislots, and symbols 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 subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

In addition, the information, parameters, etc. described in this disclosure may be represented using absolute values, may be represented using relative values from a predetermined value, or may be represented using other corresponding information. For example, a radio resource 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 formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and the various names assigned to these various channels and information elements are not limiting in any respect.

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

In addition, information, signals, etc. may be output from a higher layer to a lower layer and/or from a lower layer to a higher layer. Information, signals, etc. may be input/output via multiple network nodes.

Input/output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input/output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

The 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 performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals, or a combination of these.

The physical layer signaling may be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, using a MAC Control Element (CE).

Furthermore, notification of specified information (e.g., notification that "X is the case") is not limited to explicit notification, but may be implicit (e.g., by not notifying the specified information or by notifying other information).

The determination may be based on a value represented by a single bit (0 or 1), a Boolean value represented by true or false, or a comparison of numerical values (e.g., with a predetermined value).

Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

Software, instructions, information, etc. may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.

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

In this disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "layer", "number of layers", "rank", "resource", "resource set", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", "UE panel", "transmitting entity", "receiving entity", etc. may be used interchangeably.

In the present disclosure, the antenna port may be interchangeably read as an antenna port for any signal/channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the resource may be interchangeably read as a resource for any signal/channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time/frequency/code/space/power resources. The spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

The above groups may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.

Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be interpreted as interchangeable.

Furthermore, in this disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be interpreted as interchangeable.

Furthermore, in this disclosure, "QCL", "QCL assumptions", "QCL relationship", "QCL type information", "QCL property/properties", "specific QCL type (e.g., Type A, Type D) characteristics", "specific QCL type (e.g., Type A, Type D)", etc. may be read as interchangeable.

In this disclosure, the terms index, identifier (ID), indicator, indication, resource ID, etc. may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. "Spatial relationship information (TCI state)" may be interchangeable as "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. TCI state and TCI may be interchangeable. Spatial relationship information and spatial relationship may be interchangeable.

In this disclosure, terms such as "Base Station (BS)", "Radio 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", etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.

In this disclosure, a base station transmitting information to a terminal may be interpreted as 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" may be used interchangeably.

A mobile station may also be referred to as 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 the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

The moving body in question refers to an object that can move, and the moving speed is arbitrary, and of course includes the case where the moving body is stationary. The moving body in question includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and objects mounted on these. The moving body in question may also be a moving body that moves autonomously based on an operating command.

The moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include 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. 33 is a diagram showing 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 (including a current sensor 50, 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 unit 59, and a communication module 60.

The drive unit 41 is composed of at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handlebar), 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 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an Input/Output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal of the front wheels 46/rear wheels 47 acquired by a rotation speed sensor 51, an air pressure signal of the front wheels 46/rear wheels 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 58.

The information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 59 uses information acquired from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.

The information service unit 59 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.

The driving assistance system unit 64 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving load, such as a millimeter wave radar, a Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., a Global Navigation Satellite System (GNSS)), map information (e.g., a High Definition (HD) map, an Autonomous Vehicle (AV) map, etc.), a gyro system (e.g., an Inertial Measurement Unit (IMU), an Inertial Navigation System (INS), etc.), an Artificial Intelligence (AI) chip, and an AI processor, and one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize a driving assistance function or an autonomous 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 transmits and receives data (information) via the communication port 63 between the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 that are provided on the vehicle 40.

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 an external device. For example, it transmits and receives various information to and from the 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 above-mentioned base station 10 or user terminal 20. The communication module 60 may also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it may function as at least one of the base station 10 and user terminal 20).

The communication module 60 may transmit at least one of the signals from the various sensors 50-58 described above input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept 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, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60).

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

Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, the uplink channel, downlink channel, etc. may be read as the sidelink channel.

Similarly, the user terminal in this disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

In this disclosure, operations that are described as being performed by a base station may in some cases be performed by its upper node. In a network that includes one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) or a Serving-Gateway (S-GW)), or a combination of these.

Each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as there is no inconsistency. For example, the methods described in this disclosure present elements of various steps in an exemplary order, 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, for example, an integer or decimal)), Future Radio Access (FRA), New-Radio The present invention may be applied to systems that use 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-Wide Band (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods, as well as next-generation systems that are expanded, modified, created, or defined based on these. In addition, multiple systems may be combined (for example, a combination of LTE or LTE-A and 5G, etc.).

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

Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a 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 some way.

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

"Determining" may also be considered to mean "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

Furthermore, "judgment (decision)" may be considered to mean "judging (deciding)" resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" may be considered to mean "judging (deciding)" some kind of action. In this disclosure, "judgment (decision)" may be read as interchangeably with the actions described above.

Furthermore, in this disclosure, "determine/determining" may be interpreted interchangeably as "assume/assuming," "expect/expecting," "consider/considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interpreted interchangeably as "assumes not to do...."

In the present disclosure, "expect" may be read as "be expected". For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to infinitive, etc.) may be read as "be expected ...". "does not expect ..." may be read as "be not expected ...". Also, "An apparatus A is not expected ..." may be read as "An apparatus B other than apparatus A does not expect ..." (for example, if apparatus A is a UE, apparatus B may be a base station).

The "maximum transmit power" referred to in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

As used in this disclosure, the terms "connected" and "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may 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 the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combined" may also be interpreted in the same way as "different."

When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Additionally, the term "or," as used in this disclosure, is not intended to be an exclusive or.

In this disclosure, where articles have been added through translation, such as a, an, and the in English, this disclosure may include that the nouns following these articles are plural.

In this disclosure, terms such as "less than", "less than", "greater than", "more than", "equal to", etc. may be read as interchangeable. In addition, in this disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "fast", "slow", "wide", "narrow", etc. may be read as interchangeable, not limited to positive, comparative and superlative. In addition, in this disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "fast", "slow", "wide", "narrow", etc. may be read as interchangeable, not limited to positive, comparative and superlative, as expressions with "ith" (i is any integer) (for example, "best" may be read as "ith best").

In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

In the present disclosure, "when A, B", "if A, (then) B", "B upon A", "B in response to A", "B based on A", "B during/while A", "B before A", "B at (the same time as)/on A", "B after A", "B since A", "B until A" and the like may be read as interchangeable. Note that A, B, etc. here may be replaced with appropriate expressions such as nouns, gerunds, and normal sentences depending on the context. Note that the time difference between A and B may be almost 0 (immediately after or immediately before). Also, a time offset may be applied to the time when A occurs. For example, "A" may be read interchangeably as "before/after the time offset at which A occurs." The time offset (e.g., one or more symbols/slots) may be predefined or may be identified by the UE based on signaled information.

In this disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be interpreted as interchangeable.

The invention disclosed herein has been described in detail above, but it is clear to those skilled in the art that the invention disclosed herein is not limited to the embodiments described herein. The description of the present disclosure is intended for illustrative purposes only and does not imply any limitations on the invention disclosed herein.

Claims (6)

a receiver for receiving an instruction to switch to an uplink (UL) transmission utilizing a plurality of panels;
a control unit that controls panel switching for the uplink transmission based on the instruction of the switching,
The switching instruction includes information regarding a specific panel and a measurement reference signal (SRS) resource set associated with the specific panel. The terminal according to claim 1, wherein the control unit updates a specific parameter corresponding to the SRS resource set before the switch based on the information. The terminal according to claim 1, wherein the control unit switches the SRS resource set corresponding to the panel before switching to the SRS resource set associated with the panel to be switched to, based on the information. The receiving unit receives an instruction to switch the UL transmission using downlink control information (DCI);
The terminal of claim 1 , wherein the DCI includes an SRS resource indicator field according to a maximum number of panels supported or a transmit precoding matrix index (TPMI) field. receiving an indication to switch to uplink (UL) transmission utilizing multiple panels;
and controlling panel switching for the uplink transmission based on the instruction of switching;
The wireless communication method for a terminal, wherein the switching instruction includes information regarding a specific panel and a measurement reference signal (SRS) resource set associated with the specific panel. A transmitter that transmits a switching instruction for uplink (UL) transmission from a terminal that uses a plurality of panels;
a receiving unit that receives an uplink transmission from the terminal using the panel that has been switched based on the instruction to switch;
The base station, wherein the switching instruction includes information regarding a particular panel and a measurement reference signal (SRS) resource set associated with the particular panel.

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