Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a receiving unit that receives setting information relating to a sounding reference signal (SRS) resource; and a control unit that controls UL transmission that is transmitted from each of a plurality of panels by a space division multiplexing method on the basis of a combination of SRS resource identifiers (SRIs) indicated by a field included in downlink control information, in which an association between the maximum rank supported for the UL transmission and the number of SRS resources that can be set in each panel is set or defined.

Description

Technical Field

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

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

[0003] Successor systems of LTE (also known as, for example, 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 being studied.

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (e.g., Rel.18NR and later), UE can use one of the multiple panels (or multiple beams) for uplink (UL) transmission. In addition, in order to improve the throughput / reliability of UL, research is being conducted to support simultaneous UL transmission using multiple panels (e.g., simultaneous multi-panel UL transmission (STxMP)) for more than one transmission / reception point (TRP)).

[0009] In the case of supporting multi-panel simultaneous UL transmission, the UE transmits UL from two panels simultaneously, but how to control the UL transmission has not been fully studied.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform transmission control even when supporting simultaneous transmission using multiple panels.

[0011] Means for solving problems

[0012] A terminal involved in one embodiment of the present invention comprises: a receiving unit, which receives setting information related to a sounding reference signal (SRS) resource; and a control unit, which controls UL transmissions sent separately from multiple panels using a spatial division multiplexing method based on a combination of SRS resource identifiers (SRIs) indicated by a field contained in downlink control information, wherein an association between the maximum rank supported for the UL transmission and the number of SRS resources that can be set in each panel is set or defined.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, even when simultaneous transmission using multiple panels is supported, transmission control can be appropriately performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A And 1B is a diagram showing an example of UL transmission of a single panel.

[0016] Figure 2A-2C This is a diagram showing an example of methods 1 to 3 of simultaneous UL transmission using multiple panels.

[0017] Figure 3A-3C This is a diagram showing an example of a PUSCH transmission method.

[0018] Figure 4A-4C This is a diagram showing another example of a PUSCH transmission method.

[0019] Figure 5This is a diagram showing an example of the relationship (for example, a table) between the maximum rank and the number of SRS resources in each panel according to the first embodiment.

[0020] Figure 6 This is a diagram showing another example of the relationship (for example, a table) between the maximum rank and the number of SRS resources in each panel according to the first embodiment.

[0021] Figure 7 This is a diagram showing another example of the relationship (for example, a table) between the maximum rank and the number of SRS resources in each panel according to the first embodiment.

[0022] Figure 8 This is a diagram showing an example of an association (for example, a table) between code points of a DCI field (for example, an SRI field) according to the second embodiment and SRIs corresponding to the code points.

[0023] Fig. 9 This is a diagram showing another example of the association (for example, a table) between the code points of the DCI field (for example, the SRI field) involved in the second embodiment and the SRI corresponding to each code point.

[0024] Fig.10 This is a diagram showing another example of the association (for example, a table) between the code points of the DCI field (for example, the SRI field) involved in the second embodiment and the SRI corresponding to each code point.

[0025] Fig.11 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0026] Fig.12 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0027] Fig.13 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0028] Fig.14 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment.

[0029] Fig.15 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0030] (Control of SRS and PUSCH Transmission)

[0031] In Rel.15NR, the terminal (user terminal, User Equipment (UE)) can also receive information (SRS setting information, such as parameters in the "SRS-Config" of the RRC control element) for sending a measurement reference signal (e.g., a sounding reference signal (SRS)).

[0032] Specifically, the UE may also receive at least one of information related to one or more SRS resource sets (SRS resource set information, for example, "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, for example, "SRS-Resource" of the RRC control element).

[0033] An SRS resource set may also be associated with a specific number of SRS resources (a specific number of SRS resources may also be grouped). Each SRS resource may also be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0034] The SRS resource set information may also 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 the usage of the SRS.

[0035] Here, the SRS resource type may also represent any one of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic CSI (A-SRS). In addition, the UE may also periodically (or periodically after activation) send P-SRS and SP-SRS, and send A-SRS based on the SRS request of the DCI.

[0036] In addition, the purpose (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") can also be, for example, beam management (beamManagement), codebook (codebook (CB)), noncodebook (noncodebook (NCB)), antenna switching, etc. SRS for codebook or non-codebook purposes can also be used to determine the precoder sent by the codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on SRI.

[0037] For example, in the case of codebook-based transmission, the UE may also determine the precoder (precoding matrix) for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI) and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0038] SRS resource information may also include SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, send comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0039] The spatial relationship information of SRS (for example, "spatialRelationInfo" of RRC information element) may also indicate the spatial relationship information between a specific reference signal and SRS. The specific reference signal may also be at least one of a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and an SRS (for example, other SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0040] The spatial relationship information of SRS may also 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 specific reference signal.

[0041] In addition, in the present disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSBRI) may also be overwritten with each other. In addition, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)) may also be overwritten with each other. In addition, the SRS index, SRS resource ID, and SRI may also be overwritten with each other.

[0042] The spatial relationship information of the SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned specific reference signal.

[0043] When spatial relationship information related to SSB or CSI-RS and SRS is set for a certain SRS resource, the UE may also transmit the SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving the SSB or CSI-RS. In this case, the UE may also assume that the UE receive beam of the SSB or CSI-RS is the same as the UE transmit beam of the SRS.

[0044] In the case where spatial relationship information related to other SRS (reference SRS) and the SRS (target SRS) is set for a certain SRS (target SRS) resource, the UE may also use the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) used for transmitting the reference SRS to transmit the target SRS resource. That is, in this case, the UE may also assume that the UE transmission beam of the reference SRS is the same as the UE transmission beam of the target SRS.

[0045] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a specific field (e.g., SRS resource identifier (SRI) field) in the DCI (e.g., DCI format 0_1). Specifically, the UE may also use the spatial relationship information of the SRS resource determined based on the value of the specific field (e.g., SRI) (e.g., "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0046] In Rel.15 / 16NR, for PUSCH, when codebook-based transmission is used, the UE can also be configured with an SRS resource set with a maximum of 2 SRS resources for codebook purposes through RRC, and one of the maximum 2 SRS resources can be indicated through DCI (1-bit SRI field). The transmit beam of PUSCH is specified by the SRI field.

[0047] The UE may also determine the TPMI and the number of layers (transmission rank) for the PUSCH based on the precoding information and the number of layers field (hereinafter also referred to as the precoding information field). The UE may also select a precoder from an uplink codebook associated with the same number of ports as the number of SRS ports indicated by the "nrofSRS-Ports" of the high-level parameter based on the TPMI, the number of layers, etc., wherein the "nrofSRS-Ports" of the high-level parameter is set for the SRS resource specified by the above-mentioned SRI field.

[0048] In Rel.15 / 16NR, for PUSCH, when using non-codebook based transmission, the UE can also be configured with an SRS resource set with a maximum of 4 SRS resources for non-codebook purposes through RRC, and one or more of the maximum 4 SRS resources can be indicated through DCI (2-bit SRI field).

[0049] The UE may also determine the number of layers (transmission rank) used for the PUSCH based on the SRI field. For example, the UE may also determine that the number of SRS resources specified by the SRI field is the same as the number of layers used for the PUSCH. In addition, the UE may also calculate the precoder of the SRS resources.

[0050] When a CSI-RS (also referred to as an associated CSI-RS) associated with the SRS resource (or the SRS resource set to which the SRS resource belongs) is set in a higher layer, the transmit beam of the PUSCH may also be calculated based on (the measurement of) the set associated CSI-RS. Otherwise, the transmit beam of the PUSCH may also be specified by the SRI.

[0051] In addition, the UE may also be configured to use codebook-based PUSCH transmission or non-codebook-based PUSCH transmission through a high-level parameter "txConfig" indicating a transmission scheme. The parameter may also indicate a value of "codebook" or "non-codebook".

[0052] In the present disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may also mean a PUSCH in which "codebook" is set as a transmission scheme for the UE. In the present disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may also mean a PUSCH in which "non-codebook" is set as a transmission scheme for the UE.

[0053] However, in future wireless communication systems (for example, Rel.18NR and later), it is envisaged that more than one transmission / reception point (TRP) will be supported, using multiple beams / panels / TRPs for simultaneous UL transmission (for example, simultaneous multi-panel UL transmission (STxMP)).

[0054] For example, in Rel.18, simultaneous UL transmission using up to 2 TRPs / 2 panels is being studied. In addition, considering multi-TRP operations based on single DCI and multi-DCI, it is also assumed that the total number of layers across all panels is a maximum of 4 layers, and the total number of codewords across all panels is a maximum of 2. Of course, the number of TRPs, the number of panels, the number of layers, and the number of codewords are not limited to these.

[0055] (Single panel delivery)

[0056] The single-panel UL transmission mode or the single-panel UL transmission mode candidate may also apply at least one of the following transmission modes A and B (single-panel UL transmission modes A and B). In addition, in the present disclosure, the panel / UE panel may also be rewritten as a set of UE capability values ​​reported according to each UE capability (e.g., a UE capability value set). In addition, in the present disclosure, different panels, different spatial relationships, different joint TCI states, different TPC parameters, different antenna ports, etc. may also be rewritten with each other.

[0057] [Transmission method A: single-panel single TRP UL transmission]

[0058] In Rel.15 and Rel.16, the UE uses the following transmission method: at one time, only one beam and panel sends UL to one TRP ( Figure 1A ).

[0059] [Transmission method B: single-panel multi-TRP UL transmission]

[0060] In Rel.17, research is underway to perform UL transmission from only one beam and panel at a time, and to perform repeated transmission for multiple TRPs ( Figure 1B ).exist Figure 1B In the example, after the UE sends PUSCH from panel #1 to TRP #1 (switching beams and panels), it sends PUSCH from panel #2 to TRP #2. The two TRPs are connected via an ideal backhaul link.

[0061] (Multi-panel sending)

[0062] After Rel.18, in order to improve the throughput / reliability of UL, research is being conducted on supporting simultaneous UL transmission using multiple panels (for example, simultaneous multi-panel UL transmission (STxMP)) for more than one TRP. In addition, multi-panel UL transmission methods are being studied for specific UL channels (for example, PUSCH / PUCCH).

[0063] For example, a maximum of X (e.g., X=2) and a maximum of Y (e.g., Y=2) panels may be supported as multi-panel UL transmission. In multi-panel UL transmission, when supporting UL precoding indication for PUSCH, a codebook supporting an existing system (e.g., before Rel.16) may be simultaneously transmitted for multiple panels. Considering multi-TRP operations based on single DCI and multiple DCI, the number of layers may be a maximum of x (e.g., x=4) in all panels, and the number of codewords (CW) may be a maximum of y (e.g., y=2) in all panels.

[0064] Regarding the multi-panel UL transmission method or the multi-panel UL transmission method candidate, at least one of the following methods 1 to 3 (multi-panel UL transmission methods 1 to 3) is being studied. It is also possible to support only one of the transmission methods 1 to 3. It is also possible to support multiple methods including at least one of the transmission methods 1 to 3, and one of the multiple transmission methods is set to the UE.

[0065] <Transmission method 1: Coherent multi-panel UL transmission>

[0066] Multiple panels can also be synchronized with each other. All layers are mapped to all panels. Multiple simulated beams are indicated. The SRS Resource Indicator (SRI) field can also be extended. This method can also use a maximum of 4 layers for UL.

[0067] exist Figure 2AIn the example of , 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 mode 1 can obtain diversity-based gain. The total number of layers in the two panels is 2L. When the maximum number of layers is 4, the maximum number of layers in one panel is 2.

[0068] <Transmission method 2: non-coherent multi-panel UL transmission of one codeword (CW) or transport block (TB)>

[0069] Multiple panels may also be asynchronous. Different layers are mapped to different panels and one CW or TB for PUSCH from multiple panels. Layers corresponding to one CW or TB may also be mapped to multiple panels. The transmission method may also use a maximum of 4 layers or a maximum of 8 layers for UL. In the case of supporting a maximum of 8 layers, the transmission method may also support one CW or TB using a maximum of 8 layers.

[0070] exist Figure 2B In the example, the UE maps one CW or one TB to k layers (PUSCH (1, 2, ..., k)) and Lk layers (PUSCH (k+1, k+2, ..., L)), sends k layers from panel #1, and sends Lk layers from panel #2. Transmission mode 2 can obtain gains based on multiplexing and diversity. The total number of layers in the two panels is L.

[0071] <Transmission method 3: Incoherent multi-panel UL transmission of two CW or TB>

[0072] Multiple panels may also be unsynchronized. 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 also be mapped to one panel. Layers corresponding to multiple CWs or TBs may also be mapped to different panels. The transmission method may also use a maximum of 4 layers or a maximum of 8 layers for UL. While supporting a maximum of 8 layers, the transmission method may also support a maximum of 4 layers per CW or TB.

[0073] exist Figure 2C In the example, the UE maps CW#1 or TB#1 of 2 CWs or 2 TBs to k layers (PUSCH(1, 2, ..., k)), maps CW#2 or TB#2 to Lk layers (PUSCH(k+1, k+2, ..., L)), sends k layers from panel #1, and sends Lk layers from panel #2. Transmission mode 3 can obtain gain based on multiplexing and diversity. The total number of layers in the two panels is L.

[0074] In each of the above-mentioned transmission modes, the base station may also use UL TCI or panel ID to set or indicate panel-specific transmission for UL transmission. UL TCI (UL TCI state) may also be based on signaling similar to DL beam indication supported in Rel.15. The panel ID may also be implicitly or explicitly applied to the transmission of at least one of the target RS resource or target RS resource set, PUCCH, SRS, and PRACH. In the case where the panel ID is explicitly notified, the panel ID may also be set in at least one of the target RS, target channel, and reference RS (for example, DL RS resource setting or spatial relationship information).

[0075] (Multiple panels sent simultaneously)

[0076] In one or more of the above-mentioned transmission methods / modes, research is being conducted on: multi-panel UL transmission related to scheduling of PUSCH based on one DCI (single DCI) / scheduling of PUSCH based on multiple DCIs (multi-DCI) (for example, simultaneous multi-panel transmission (Simultaneous Transmission across Multiple Panels (STxMP))).

[0077] In simultaneous multi-panel transmission (STxMP) in a multi-TRP system based on a single DCI, the following method can also be applied to UL transmission (e.g., PUSCH).

[0078] Space Division Multiplexing (SDM): Different layers / DMRS ports of a PUSCH are precoded separately and sent simultaneously from different UE beams / panels (see Figure 3A , Figure 3B ).

[0079] · SDM repetition method: Two PUSCH transmission opportunities with different redundancy versions (RV) of the same TB are sent simultaneously from two different UE beams / panels on the same time and frequency resources (refer to Figure 3C ).

[0080] Frequency Division Multiplexing (FDM)-A: Different parts of the frequency domain resources of a PUSCH transmission opportunity (e.g., one PUSCH transmission occasion) are transmitted from different UE beams / panels (see Figure 4A ).

[0081] FDM-B mode: two PUSCH transmission opportunities with the same / different RVs of the same TB are sent from different UE beams / panels on non-overlapping frequency domain resources and the same time domain resources (refer to Figure 4B ).

[0082] SFN-based transmission method: All the same layers / DMRS ports of a PUSCH are transmitted simultaneously from two different UE beams / panels (refer to Figure 4C ).

[0083] In addition, in the present disclosure, repeatedly sending and sending may be replaced with each other. Sending multiple TBs may also mean sending multiple identical TBs or sending different TBs.

[0084] [Space Division Multiplexing (SDM)]

[0085] The UE may also assume that PUSCH repetition transmissions to which space division multiplexing (SDM) is applied are scheduled in the same time resource and the same frequency resource. That is, when coherent multiple panels are used, the UE may also transmit PUSCH repetition transmissions to which SDM is applied in the same time resource and the same frequency resource.

[0086] Figure 3A FIG. 1 is a diagram showing an example of repeated transmission using SDM applied to one CW. Figure 3A In the example, the time and frequency resources of layers #1-2 and layers #3-4 corresponding to PUSCH / PUCCH are the same.

[0087] Figure 3B 1 is a diagram showing an example of repeated transmission using two CWs to which SDM is applied. Figure 3B In the example, the time and frequency resources of CW#1 and CW#2 corresponding to PUSCH / PUCCH are the same.

[0088] Figure 3C FIG. 1 is a diagram showing an example of repeated transmission using SDM. Figure 3C In the present invention, the time and frequency resources of PUSCH / PUCCH repetition #1 and repetition #2 are the same.

[0089] In addition, PUSCH transmission to which SDM is applied (for example, PUSCH repetitive transmission) may be a structure in which at least a part of time and frequency resources are repeated.

[0090] [Frequency Division Multiplexing (FDM)]

[0091] The UE may also assume that PUSCH / PUCCH repetitive transmissions using frequency division multiplexing (FDM) are scheduled in the same time resource and different frequency resources. That is, when coherent multiple panels are used, the UE may also transmit PUSCH / PUCCH repetitive transmissions using FDM in the same time resource and different frequency resources.

[0092] Figure 4A This is a diagram showing a first example of iterative transmission to which FDM (FDM-A) is applied. Figure 4A An example is shown in which PUSCH / PUCCH is repeatedly transmitted once for each TB / UCI.

[0093] Figure 4B This is a diagram showing a second example of repeated transmission to which FDM (FDM-B) is applied. Figure 4B An example is shown in which PUSCH / PUCCH is repeatedly transmitted twice for each TB / UCI.

[0094] Figure 4C This is a diagram showing an example of repeated transmission using a single frequency network (SFN). Figure 4C An example is shown in which a PUSCH / PUCCH is transmitted using a different beam / panel for each TB / UCI.

[0095] like Figure 3A , Figure 3B As shown, in the case of simultaneous multi-panel transmission based on spatial division multiplexing (STxMP SDM scheme) for non-codebook PUSCH transmission, different layers / DMRS ports of one PUSCH can be precoded separately and transmitted simultaneously from different UP panels.

[0096] For simultaneous multi-panel transmission according to the non-codebook based spatial division multiplexing scheme of PUSCH, the following two options are conceivable as SRI indication (eg, SRI indication).

[0097] <Option 1>

[0098] Indicates one SRI combination (eg, one SRI combination). The combination of SRIs may also be indicated from non-codebook SRS resources across two panels (eg, NCB SRS resources across two panels).

[0099] <Option 2>

[0100] Indicating multiple (eg, 2) SRS combinations (eg, two SRI combinations). The SRI combinations may also be indicated from non-codebook SRS resources of one panel (eg, NCB SRS resources of one panel).

[0101] An SRI combination may also include one or more SRS resources (e.g., SRS resources not used for codebooks). For example, an SRI combination (or an SRI field) may indicate the SRI / SRS resources corresponding to each panel. An SRI combination may also be rewritten as an SRI set or an SRI group.

[0102] As a method of UL transmission after Rel. 18, it is also conceivable to limit the number of layers across two panels to a maximum of X layers and not introduce a new codebook, or both. X may be 4, for example. Of course, the value of X is not limited to 4, and may be other values.

[0103] In this case, how to apply / set the SRI field becomes a problem.

[0104] As an example, in Option 1, the question is whether to reuse the SRI field of the existing system (e.g., Rel. 15 / 16 / 17) or to extend the SRI field based on the SRI field of the existing system. In the case of extension, how to extend becomes a question. Or, as another example, in Option 2, how to indicate a combination of multiple (e.g., 2) SRIs becomes a question.

[0105] The inventors of the present invention studied UL transmission control (for example, SRI indication method / SRS resource setting, etc.) in the case of supporting simultaneous transmission using multiple panels, and conceived of the present embodiment.

[0106] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be used individually or in combination.

[0107] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C".

[0108] In the present disclosure, activate, deactivate, indicate (or specify), select, configure, update, determine, etc. may also be mutually rewritten. In the present disclosure, support, control, controllable, operate, and operate may also be mutually rewritten.

[0109] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, high-layer parameters, fields, Information Element (IE), settings, etc. may also be overwritten with each other. In the present disclosure, Medium Access Control (MAC) control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc. may also be overwritten with each other.

[0110] In the present disclosure, the high-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0111] In the present disclosure, MAC signaling may also use, for example, MAC Control Element (MACCE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0112] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0113] In the present disclosure, index, identifier (ID), indicator, resource ID, etc. may also be mutually overwritten. In the present disclosure, sequence, list, set, group, cluster, subset, etc. may also be mutually overwritten.

[0114] In the present disclosure, panel, UE panel, panel group, beam, beam group, precoder, uplink (UL) transmission entity, transmission / reception point (TRP)), base station, spatial relationship information (Spatial Relation Information (SRI)), spatial relationship, SRS resource indicator (SRS Resource Indicator (SRI)), control resource set (COntrol REsource SET (CORESET)), physical downlink shared channel (Physical Downlink Shared Channel (PDSCH)), codeword (Codeword (CW)), transport block (Transport Block (TB)), reference signal (Reference Signal (RS)), antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, code division multiplexing (Code Division Multiplexing (CDM)) group, reference signal group, CORESET group, physical uplink control channel (Physical Uplink Control Channel (PUCCH)) group, PUCCH resource group), resources (for example, reference signal resources, SRS resources), resource sets (for example, reference signal resource sets), CORESET pool, downlink transmission configuration indication state (Transmission Configuration Indication state) (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), Quasi-Co-Location (Quasi-Co-Location (QCL)), QCL assumptions, etc. can also be rewritten with each other.

[0115] In addition, the spatial relationship information identifier (Identifier (ID)) (TCI state ID) and the spatial relationship information (TCI state) can also be overwritten with each other. "Spatial relationship information" can also be overwritten with "a collection of spatial relationship information", "one or more spatial relationship information", etc. TCI state and TCI can also be overwritten with each other.

[0116] (Wireless Communication Method)

[0117] Based on the SRI indicated by the DCI, the UE controls the transmission of PUSCH (eg, NCB PUSCH) transmitted simultaneously from multiple panels using space division multiplexing. The specific SRS resource indicated by the SRI may also be selected from one or more SRS resource candidates pre-set by higher layer parameters.

[0118] The UE may also receive configuration information related to SRS resources. The configuration information related to SRS resources may be commonly configured for multiple (eg, 2) panels or may be configured separately. The configuration information related to SRS resources may also be a list of SRS resource sets or SRS resources.

[0119] In the case where simultaneous multi-panel transmission utilizing space division multiplexing is indicated / set (for example, STxMP SDM scheme), the SRI / SRS resources corresponding to each panel may be indicated by one SRI combination. The specific SRI (or SRS resource) indicated by the one SRI combination may also be selected from one or more SRS resource candidates set in common for multiple panels. That is, the SRS resource candidate / SRS resource set may also be set in common for multiple panels (or the SRS resource candidate may be set regardless of the panel index).

[0120] In the case where simultaneous multi-panel transmission utilizing space division multiplexing is indicated / set (e.g., STxMP SDM scheme), the SRI / SRS resources corresponding to each panel may be indicated by multiple (e.g., 2) SRI combinations. The specific SRI (or, SRS resource) indicated by each SRI combination may also be selected from one or more SRS resource candidates set for one panel. That is, SRS resource candidates / SRS resource sets may also be set separately for multiple panels.

[0121] In the following description, the case of using two beams / panels / TRPs (for example, simultaneous UL transmission using two panels) is used as an example, but the number of applicable beams / panels / TRPs is not limited thereto. This embodiment can also be applied in the same manner when more than three beams / panels / TRPs are used.

[0122] In the following description, the panel may also be rewritten as beam / SRI / TCI / UE capability value set (e.g., UE capability value set (UE capability value set)) / SRS resource / SRS resource set / TRP. The first / second panel may also refer to the first / second beam / SRI / SRI field / TCI / TCI field / UE capability value set / SRS resource / SRS resource set / TRP. Alternatively, the first / second panel may also refer to a UE capability value set with a lower / higher index, an SRS resource with a lower / higher ID, an SRS resource set with a higher / lower ID, or a TRP with a lower / higher ID. Alternatively, the first / second panel may also be an SRS resource / SRS resource set with fewer / more ports.

[0123] In addition, in the following description, non-codebook-based UL transmission (e.g., PUSCH transmission based on SRI / SRS resources for non-codebook) is taken as an example, but the present embodiment is not limited thereto. Some or all of the following methods may also be applied to codebook-based UL transmission (e.g., PUSCH transmission based on SRI / SRS resources for codebook).

[0124] In addition, in the following description, it is assumed that the UL transmission corresponding to each panel (for example, PUSCH transmitted simultaneously from each panel using space division multiplexing) is scheduled by one DCI, but it is not limited to this.

[0125] In the following description, an application using a transmission method using a space division multiplexing method (SDM method) may be indicated by a higher layer parameter / DCI.

[0126] For example, the transmission mode (for example, SDM mode / other modes) may be set to the UE through high-level parameters. Alternatively, the transmission mode may be indicated to the UE through DCI. Alternatively, two beams (SRI / TCI status) / panels may be indicated to the UE through DCI. Alternatively, two SRI fields / TCI fields may be indicated through DCI. Alternatively, two CB / NCB SRS resource sets may be set. Alternatively, the DMR port may be indicated in 2 or more CDM groups through DCI.

[0127] <First embodiment>

[0128] The first embodiment describes the number of SRS resources that can be set in each panel when supporting simultaneous multi-panel transmission using a space division multiplexing method (for example, STxMP SDM scheme).

[0129] In the first embodiment, a case where one SRI combination (e.g., one SRI combination) is indicated / set / applied is described. The SRI combination may also indicate a specific SRS resource from SRS resources across multiple (e.g., 2) panels. The SRS resource may also be a non-codebook SRS resource (e.g., an NCB SRS resource).

[0130] For example, an SRI combination (e.g., two or more SRI / SRS resources or SRI / SRS resources corresponding to each panel) may be indicated by an SRI field included in the DCI. In this case, the multiple SRS resource candidates indicated by the SRI field may be set in common to multiple panels or may be set independently of the panels.

[0131] In the case where simultaneous multi-panel transmission based on space division multiplexing is indicated / set / supported, a specific combination / association of the maximum rank and the number of SRS resources of the two panels may also be defined / set. In addition, the SRS resources (or the number of SRS resources) set to each panel may also be determined based on the specific combination / association according to each maximum rank. The maximum rank (maxRank) may also be the maximum number of ranks (or the maximum number of layers) that can be supported when using multiple panels (or the STxMP SDM scheme).

[0132] The UE may also expect / assume that the SRS resources corresponding to each panel are indicated based on the combination / association of the maximum rank and the number of SRS resources corresponding to the two panels.

[0133] At least one of the following options 1-1 to 1-3 may be applied as a combination / association of the maximum rank sum and the number of SRS resources corresponding to two panels.

[0134] [Option 1-1]

[0135] The total number of SRS resources of the two panels is set to be less than or equal to the maximum X. In addition, the total number of SRS resources of the two panels is set to be greater than the maximum rank (or equal to or greater than the maximum rank). X may be 4, for example. Of course, the value of X is not limited to 4.

[0136] The structure of the maximum rank and number of SRS resources may also be defined / set depending on the UE capabilities. For example, the maximum number of SRS resources for the two panels may be determined based on the maximum number of layers reported as UE capability information. The maximum rank may also be equivalent to the sum of the ranks of the two panels.

[0137] Figure 5 An example of the combination / association of the maximum rank and the number of SRS resources corresponding to each panel is shown.

[0138] The number of SRS resources corresponding to each panel may also be the number of SRS resources that can be set (or associated) in each panel. The base station may also configure / activate information related to the SRS resources corresponding to each panel to the UE using RRC parameters / MAC CE.

[0139] Figure 5 The number of SRS resources corresponding to each panel means the number of SRS resources set by the RRC parameters, and may be different from the number of SRS resources used in PUSCH transmission indicated by the SRI field of the DCI. As an example, when the rank = 3 and the total number of SRS resources corresponding to each panel is 4 (for example, the number of SRS resources of the first panel is 3 and the number of SRS resources of the second panel is 1), 3 of the 4 SRS resources may also be indicated by the SRI field.

[0140] exist Figure 5 In , the number of SRS resources of each panel (or the number of SRS resources that can be set in each panel) is defined for each maximum rank. Here, it is defined that the total number of SRS resources of each panel is a candidate (or entry) that is greater than the maximum rank. Figure 5 The combination / association (also referred to as a table) of the maximum rank and the number of SRS resources of each panel may be defined in the specification or may be set to the UE through higher layer signaling.

[0141] For the same maximum rank value, multiple candidates for the number of SRS resources for each panel may be defined. Here, two candidates are defined for maximum rank 4, three candidates are defined for maximum rank 3, and four candidates are defined for maximum rank 2. Of course, the number of candidates defined for each maximum rank is not limited to this.

[0142] exist Figure 5 In the example, the number of SRS resources that can be set in the first panel is greater than the number of SRS resources that can be set in the second panel, but the present invention is not limited thereto. In addition, the number of SRS resources in the first panel and the number of SRS resources in the second panel may be switched (or switched).

[0143] exist Figure 5 , a case where the number of SRS resources corresponding to (or capable of being set to) the first panel is different from the number of SRS resources corresponding to the second panel is shown, but it is not limited to this. The number of SRS resources corresponding to the first panel and the number of SRS resources corresponding to the second panel may also be the same. In this case, only a specific value (for example, {2, 4}) may be supported as the maximum rank.

[0144] [Option 1-2]

[0145] The number of SRS resources of each panel is set to be less than or equal to the maximum Y. In addition, the total number of SRS resources of the two panels is set to be greater than the maximum rank (or equal to or greater than the maximum rank). Y may be 2, for example. Of course, the value of Y is not limited to 2.

[0146] The structure of the maximum rank and number of SRS resources may also be defined / set depending on the UE capabilities. For example, the maximum number of SRS resources for the two panels may be determined based on the maximum number of layers reported as UE capability information. The maximum rank may also be equivalent to the sum of the ranks of the two panels.

[0147] Figure 6 An example of the combination / association of the maximum rank and the number of SRS resources corresponding to each panel is shown.

[0148] The number of SRS resources corresponding to each panel may also be the number of SRS resources that can be set (or associated) in each panel. The base station may also configure / activate information related to the SRS resources corresponding to each panel to the UE using RRC parameters / MAC CE.

[0149] Figure 6 The number of SRS resources corresponding to each panel means the number of SRS resources set by the RRC parameters, which may be different from the number of SRS resources used in PUSCH transmission indicated by the SRI field of the DCI. As an example, when the rank = 3 and the total number of SRS resources corresponding to each panel is 4 (for example, the number of SRS resources of the first panel is 2 and the number of SRS resources of the second panel is 2), 3 of the 4 SRS resources may also be indicated by the SRI field.

[0150] exist Figure 6 In , the number of SRS resources of each panel (or the number of SRS resources that can be set in each panel) is defined for each maximum rank. Here, it is defined that the total number of SRS resources of each panel is equal to or greater than the maximum rank. Figure 6 The combination / association (also referred to as a table) of the maximum rank and the number of SRS resources for each panel may be defined in the specification or may be set to the UE via higher layer signaling.

[0151] For the same maximum rank value, multiple candidates for the number of SRS resources for each panel may be defined. Here, one candidate is defined for maximum rank 4, two candidates are defined for maximum rank 3, and three candidates are defined for maximum rank 2. Of course, the number of candidates defined for each maximum rank is not limited to this.

[0152] exist Figure 6In the example, the number of SRS resources that can be set in the first panel is greater than the number of SRS resources that can be set in the second panel, but the present invention is not limited thereto. In addition, the number of SRS resources in the first panel and the number of SRS resources in the second panel may be switched (or switched).

[0153] exist Figure 6 , a case where the number of SRS resources corresponding to (or capable of being set to) the first panel is different from the number of SRS resources corresponding to the second panel is shown, but it is not limited to this. The number of SRS resources corresponding to the first panel and the number of SRS resources corresponding to the second panel may also be the same. In this case, only a specific value (for example, {2, 4}) may be supported as the maximum rank.

[0154] [Options 1-3]

[0155] The number of SRS resources of each panel is set to be less than the maximum Z. In addition, the total number of SRS resources of the two panels is set to be greater than the maximum rank (or the same as the maximum rank or greater than the maximum rank). Z can also be 4, for example. Of course, the value of Z is not limited to 4.

[0156] The structure of the maximum rank and number of SRS resources may also be defined / set depending on the UE capabilities. For example, the maximum number of SRS resources for the two panels may be determined based on the maximum number of layers reported as UE capability information. The maximum rank may also be equivalent to the sum of the ranks of the two panels.

[0157] Figure 7 An example of the combination / association of the maximum rank and the number of SRS resources corresponding to each panel is shown.

[0158] The number of SRS resources corresponding to each panel may also be the number of SRS resources that can be set (or associated) in each panel. The base station may also configure / activate information related to the SRS resources corresponding to each panel to the UE using RRC parameters / MAC CE.

[0159] Figure 7 The number of SRS resources corresponding to each panel means the number of SRS resources set by the RRC parameters, which may be different from the number of SRS resources used in PUSCH transmission indicated by the SRI field of the DCI. As an example, when the rank = 3 and the total number of SRS resources corresponding to each panel is 8 (for example, the number of SRS resources of the first panel is 4 and the number of SRS resources of the second panel is 4), 3 of the 8 SRS resources may also be indicated by the SRI field.

[0160] exist Figure 7In , the number of SRS resources of each panel (or the number of SRS resources that can be set in each panel) is defined for each maximum rank. Here, it is defined that the total number of SRS resources of each panel is equal to or greater than the maximum rank. Figure 7 The combination / association (also referred to as a table) of the maximum rank and the number of SRS resources for each panel may be defined in the specification or may be set to the UE via higher layer signaling.

[0161] For the same maximum rank value, multiple candidates for the number of SRS resources for each panel may be defined.

[0162] The number of SRS resources of the first panel and the number of SRS resources of the second panel may be switched (or, switched).

[0163] exist Figure 7 , a case where the number of SRS resources corresponding to (or capable of being set to) the first panel is different from the number of SRS resources corresponding to the second panel is shown, but it is not limited to this. The number of SRS resources corresponding to the first panel and the number of SRS resources corresponding to the second panel may also be the same. In this case, only a specific value (for example, {2, 4}) may be supported as the maximum rank.

[0164] <Second embodiment>

[0165] The second embodiment describes an indication based on SRI combination (eg, SRI combination) when supporting simultaneous multi-panel transmission based on space division multiplexing (eg, STxMP SDM scheme). The second embodiment may also be applied in combination with the first embodiment.

[0166] In the second embodiment, a case where one SRI combination (e.g., one SRI combination) is indicated / set / applied is described. The SRI combination may also indicate a specific SRS resource (or a specific number of SRS resources) from SRS resources across multiple (e.g., 2) panels. The SRS resource may also be a non-codebook SRS resource (e.g., an NCB SRS resource).

[0167] The SRS resource indication field included in the DCI and the SRI indication table for the non-codebook PUSCH (e.g., NCB PUSCH) may also be used to indicate specific SRS resources (or SRS resource identifiers) to the UE. The SRI indication table (or SRI table) may also be rewritten as an association between the value (or code point) of the SRS resource indication field and the SRI.

[0168] [Option 2-1]

[0169] In Option 1-1 / Option 1-2 of the first embodiment, the existing SRS resource indication field and the existing SRI indication table may be utilized (for example, utilizing a portion of a code point / table) to indicate a specific SRI (or SRS resource) to the UE.

[0170] When simultaneous multi-panel transmission based on space division multiplexing is indicated / set (for example, STxMP SDM scheme), the number of SRS resources may be the total number of SRS resources across two panels and the SRI indication table may be applied.

[0171] Assume that the number of SRS resources of the first panel is N, and the number of SRS resources of the second panel is M. In this case, it is also possible that, in the SRI of the SRI indication table, SRI0, 1.., N-1 means the SRS resources of the first panel, and the remaining SRIs (for example, SRIN, N+1, .., N+M-1) mean the SRS resources of the second panel. Alternatively, it is also possible that, in the SRI of the SRI indication table, SRI0, 2, ... means the SRS resources of the first panel, and the remaining SRIs (for example, SRI1, 3, ...) mean the second SRS resources.

[0172] At least one of N and M can be set by RRC parameters or defined in the specification. At least one of N and M can also be determined by a floor function. For example, N can also be determined by floor(number of SRS resources / 2). Alternatively, N can be determined by ceiling(number of SRS resources / ) and M can be determined by floor(number of SRS resources / 2).

[0173] Figure 8-Figure 10 An example of the association (table) between the index indicated by the SRI field (SRI field index / SRI index) and one or more SRIs (SRS resource IDs) for NCB-based PUSCH transmission is shown. Figure 8 Corresponding to L max =2, Fig. 9 Corresponding to L max =3, Fig.10 Corresponding to L max =4.

[0174] N SRSN is the number of SRS resources in the SRS resource set, which is set by the list of SRS resource sets (srs-ResourceSetToAddModList) and is associated with non-codebook usage. When the STxMP SDM scheme (STxMP SDMscheme) is indicated / set, N SRS It can also be considered as the total number of SRS resources across multiple panels.

[0175] If the UE supports operation using the higher layer parameter maxMIMO-Layers indicating the maximum number of Multi Input Multi Output (MIMO) layers and the higher layer parameter maxMIMO-Layers is set, L max provided by this parameter. In that case, L max It may also be provided by the maximum number of layers for PUSCH supported by the UE.

[0176] exist Figure 8-Figure 10 In N SRS =2, SRI0 corresponds to the first panel and SRI1 corresponds to the second panel. SRS =3, SRI0 corresponds to the first panel, and SRI1 / 2 corresponds to the second panel. SRS = 4, SRI0 / 1 corresponds to the first panel, and SRI2 / 3 corresponds to the second panel. Of course, the correspondence between SRI and the first panel / second panel is not limited to this, and the first panel and the second panel may be replaced, or other correspondences may be applied.

[0177] When simultaneous multi-panel transmission based on space division multiplexing is indicated / set (for example, STxMP SDM scheme), only the part that defines multiple SRIs (or a combination of SRIs) may be applied. Figure 8 In N SRS = 2, the index 2 of the SRI field (SRI: 0, 1) is applied, and in N SRS =3, the index 3 (SRI: 0, 1) and 4 (SRI: 0, 2) of the SRI field are applied, and in N SRS =4, the SRI field indexes 5 (SRI: 0, 2), 6 (SRI: 0, 3), 7 (SRI: 1, 2) and 8 (SRI: 1, 3) are applied.

[0178] Two or more SRIs (or SRI combinations) corresponding to each code point may be indicated from the SRS resources set in common for the two panels.

[0179] Like this, in the SRI table of the existing system (eg, Rel. 17), a bit field (code point) in which the SRI corresponding to the first panel and the second panel exists can also be selectively applied.

[0180] For example, when the STxMP SDM scheme is indicated / set, the structure may be set to not use the SRI containing only SRS resources from a single panel (or, only indicate the SRI combination corresponding to the SRS resources of a single panel). For example, when the STxMP SDM scheme is indicated / set, the UE may also expect / assume that the SRI (or, the code point corresponding to the SRI) in which all SRS resources correspond only to a single panel (or, one panel) is not used. Alternatively, the UE may ignore the SRI (or, the code point corresponding to the SRI).

[0181] Alternatively, in the case of supporting dynamic switching between a single panel and the STxMP SDM scheme (STxMP SDM scheme) (e.g., dynamic switching), the SRI indication may also refer to the scheduling mode / selected panel. For example, in the case of an SRI indicated to have only SRS resources from a single panel (e.g., all SRS resources correspond to a single panel), it may also refer to single panel transmission. The UE may also determine the transmission type (e.g., single panel transmission / multi-panel transmission (STxMP SDM scheme)) based on the SRI indication.

[0182] When the STxMP SDM scheme is indicated / set, the structure in which the SRI corresponding to a specific rank is not applied may also be set. The specific rank may be, for example, rank = 1 (or, number of SRS resources = 1). When the STxMP SDM scheme is indicated / set, the UE may also expect / assume that the SRI corresponding to the specific rank is not applied (or, the SRI corresponding to the specific rank may be ignored).

[0183] Alternatively, in the case of supporting dynamic switching between a single panel and the STxMP SDM scheme (STxMP SDM scheme) (e.g., dynamic switching), the SRI indication may also mean the scheduling mode / selected panel. For example, in the case of an SRI indicated with rank = 1 (e.g., number of SRS resources = 1), it may also mean single panel transmission. The UE may also determine the transmission type (e.g., single panel transmission / multi-panel transmission (STxMP SDM scheme)) based on the SRI indication.

[0184] in addition, Figure 8 -exist Fig.10 In the example, the SRI indication table of the existing system (eg, Rel. 17) is used, but it is not limited thereto. For each code point of the SRI field, a new SRI indication field obtained by associating the SRI corresponding to the first panel with the SRI corresponding to the second panel may also be applied.

[0185] When a new SRI indication table is introduced, the SRI indication table of the existing system and the new SRI indication table may be switched for application. The switching between the SRI indication table of the existing system and the new SRI indication table may also be controlled based on RRC parameters / DCI. For example, the switching of the table may also be controlled based on whether or not a specific RRC parameter is set and at least one of the RNTIs used for CRC scrambling of the DCI.

[0186] [Option 2-2]

[0187] In Option 1-3 of the first embodiment, a new SRI indication table applied to PUSCH (eg, NCB PUSCH) transmission may be used to indicate a specific SRI (or SRS resource) to the UE. In addition, Option 2-2 may also be applied to Option 1-1 / Option 1-2 of the first embodiment.

[0188] The new SRI indication table may also be a table that supports the case where the total number of SRS resources across two panels is greater than 4.

[0189] Assume that the number of SRS resources of the first panel is N, and the number of SRS resources of the second panel is M. In this case, it is also possible that, in the SRI of the SRI indication table, SRI0, 1.., N-1 means the SRS resources of the first panel, and the remaining SRIs (for example, SRIN, N+1, .., N+M-1) mean the SRS resources of the second panel. Alternatively, it is also possible that, in the SRI of the SRI indication table, SRI0, 2, ... means the SRS resources of the first panel, and the remaining SRIs (for example, SRI1, 3, ...) mean the second SRS resources.

[0190] When the STxMP SDM scheme is indicated / set, the structure may be set to not use the SRI containing only SRS resources from a single panel (or, only indicate the SRI combination corresponding to the SRS resources of a single panel). For example, when the STxMP SDM scheme is indicated / set, the UE may also expect / assume that the SRI (or, the code point corresponding to the SRI) in which all SRS resources correspond only to a single panel (or, one panel) is not used. Alternatively, the UE may ignore the SRI (or, the code point corresponding to the SRI).

[0191] Alternatively, in the case of supporting dynamic switching between a single panel and the STxMP SDM scheme (STxMP SDM scheme) (e.g., dynamic switching), the SRI indication may also refer to the scheduling mode / selected panel. For example, in the case of an SRI indicated to have only SRS resources from a single panel (e.g., all SRS resources correspond to a single panel), it may also refer to single panel transmission. The UE may also determine the transmission type (e.g., single panel transmission / multi-panel transmission (STxMP SDM scheme)) based on the SRI indication.

[0192] When the STxMP SDM scheme is indicated / set, the structure in which the SRI corresponding to a specific rank is not applied may also be set. The specific rank may be, for example, rank = 1 (or, number of SRS resources = 1). When the STxMP SDM scheme is indicated / set, the UE may also expect / assume that the SRI corresponding to the specific rank is not applied (or, the SRI corresponding to the specific rank may be ignored).

[0193] Alternatively, in the case of supporting dynamic switching between a single panel and the STxMP SDM scheme (STxMP SDM scheme) (e.g., dynamic switching), the SRI indication may also mean the scheduling mode / selected panel. For example, in the case of an SRI indicated with rank = 1 (e.g., number of SRS resources = 1), it may also mean single panel transmission. The UE may also determine the transmission type (e.g., single panel transmission / multi-panel transmission (STxMP SDM scheme)) based on the SRI indication.

[0194] When a new SRI indication table is introduced, the SRI indication table of the existing system and the new SRI indication table may be switched for application. The switching between the SRI indication table of the existing system and the new SRI indication table may also be controlled based on RRC parameters / DCI. For example, the switching of the table may also be controlled based on whether or not a specific RRC parameter is set and at least one of the RNTIs used for CRC scrambling of the DCI.

[0195] <Third Embodiment>

[0196] The third embodiment describes the number of SRS resources that can be set in each panel when supporting simultaneous multi-panel transmission based on a space division multiplexing method (for example, STxMP SDM scheme).

[0197] In the third embodiment, a case where two SRI combinations (e.g., one SRI combination) are indicated / set / applied is described. Each SRI combination may also indicate one or more SRI / SRS resources of the corresponding panels from the SRS resources of one panel (or a candidate of SRS resources corresponding to one panel). The SRS resources may also be non-codebook SRS resources (e.g., NCB SRS resources).

[0198] For example, the SRI / SRS resources corresponding to each panel may be indicated by one or two fields (e.g., SRI field) included in the DCI. In this case, the candidates for the SRS resources that can be indicated by each SRI combination may also be set separately for each panel. For example, candidates (or, SRS resource sets) for multiple SRS resources that can be indicated by a first SRS combination (or, a first field) and candidates for multiple SRS resources that can be indicated by a second SRS combination (or, a second field) may also be set separately by RRC parameters.

[0199] In the case where simultaneous multi-panel transmission based on space division multiplexing is indicated / set / supported, a specific combination / association of the maximum rank and the number of SRS resources of the two panels may also be defined / set. In addition, the SRS resources (or the number of SRS resources) set for each panel according to each maximum rank may also be determined based on the specific combination / association. The maximum rank (maxRank) may also be the maximum number of ranks (or the maximum number of layers) that can be supported when using multiple panels (or the STxMP SDM scheme).

[0200] The UE may also expect / assume that the SRS resources corresponding to each panel are indicated based on the combination / association of the maximum rank and the number of SRS resources corresponding to the two panels.

[0201] As a combination / association of the maximum rank sum and the number of SRS resources corresponding to two panels, at least one of options 1-1 to 1-3 shown in the first embodiment may be applied.

[0202] In the third embodiment, the SRI / SRS resources corresponding to each panel are indicated by two SRI combinations (or two SRI fields each including an SRI combination), which is different from the first embodiment. For the number of SRS resources for each panel corresponding to the maximum rank (or the number of SRS resources for each panel that can be set for each maximum rank), the structure shown in the first embodiment (at least one of options 1-1 to 1-3) can also be applied.

[0203] <Fourth embodiment>

[0204] The fourth embodiment describes the indication of SRI / SRS resources corresponding to each panel when supporting simultaneous multi-panel transmission based on space division multiplexing (eg, STxMP SDM scheme). The fourth embodiment may also be applied in combination with the third embodiment.

[0205] In the fourth embodiment, a case where two SRI combinations (e.g., two SRI combinations) are indicated / set / applied is described. Each SRI combination may also indicate one or more SRI / SRS resources of the corresponding panels from an SRS resource of a panel (or a candidate of an SRS resource corresponding to a panel). In addition, each SRI combination may also include one or more SRI / SRS resources.

[0206] For two SRI combinations, one or more fields (eg, fields included in the DCI) may also be applied.

[0207] [Option 4-1]

[0208] Multiple (for example, 2) DCI fields may also be set in the DCI for indicating the SRI of each panel. When the STxMP SDM scheme is indicated / set, the first DCI field may indicate one or more SRIs corresponding to the first panel, and the second DCI field may indicate one or more SRIs corresponding to the second panel.

[0209] The indicated SRI (or SRS resources) may also mean a rank. The UE may also assume that the number of SRS resources corresponding to the indicated SRI is equivalent to the rank (or determine the rank based on the number of SRS resources corresponding to the SRI).

[0210] [Option 4-2]

[0211] The first DCI field may also indicate one or more SRIs corresponding to the first panel and the rank (or layer) of the second panel, and the second DCI field may indicate one or more SRIs corresponding to the second panel.

[0212] The second DCI field may also indicate an SRI (or, SRS resource) corresponding to the rank indicated by the first DCI field.

[0213] [Option 4-3]

[0214] The first DCI field may also indicate the rank of the first panel and the rank of the second panel, and the second DCI field may indicate one or more SRIs corresponding to the first panel and one or more SRIs corresponding to the second panel.

[0215] The second DCI field may also indicate an SRI corresponding to the rank indicated by the first DCI field.

[0216] [Option 4-4]

[0217] The first DCI field may also indicate the rank of the first panel and the rank of the second panel, the second DCI field may indicate more than one SRI corresponding to the first panel, and the third DCI field may indicate more than one SRI corresponding to the second panel.

[0218] The second DCI field / the third DCI field may also indicate the SRI corresponding to the rank respectively indicated by the first DCI field.

[0219] [Option 4-5]

[0220] One or more SRIs corresponding to the first panel and one or more SRIs corresponding to the second panel may also be indicated by one DCI field. In this case, the indicated SRI may also mean the rank. That is, it may also mean that the number of SRS resources corresponding to the indicated SRI is the rank.

[0221] [change]

[0222] The DCI field indicates the sum of the ranks of the first panel and the second panel, and the rank of the first panel and the rank of the second panel may also be determined from the sum of the ranks based on a specific rule. For example, when the sum of the ranks is an even number, the UE may also assume that the sum of the ranks corresponding to the first panel and the rank corresponding to the second panel is the same. When the sum of the ranks is an odd number, the UE may also assume that one of the ranks corresponding to the first panel and the ranks corresponding to the second panel (e.g., the rank of the first panel) is greater than the other (e.g., 1 more rank).

[0223] The rank indication based on the DCI field may also be an indication of a combination of ranks of the first panel and the second panel. For example, at least one of the following Alt.4-1 to Alt.4-2 may also be applied.

[0224] 《Alt.4-1》

[0225] In the case where the STxMP SDM scheme is taken as a premise (or, only the STxMP SDM scheme is considered), a specific rank combination may also be indicated from the candidates of the specific rank combination. The specific rank combination candidate may also be, for example, {(1, 1), (1, 2), (2, 1), (2, 2), (3, 1), (1, 3)}. The UE may also determine the rank corresponding to the first panel and the rank corresponding to the second panel based on the rank indication information.

[0226] 《Alt.4-2》

[0227] In the case of supporting dynamic switching between single panel transmission (e.g., single panel TX) and STxMP SDM, a combined indication (or an indication of a DCI field) can also be used to indicate a rank combination of single panel transmission or STxMP SDM. The combined indication can also indicate a specific rank combination from a specific rank combination candidate.

[0228] When single panel Tx with 1 is not supported (e.g., single panel Tx with 1 st single panel Tx with 2 panel) and single panel Tx with 2 panel nd In the case of single panel transmission), the specific rank combination candidates may also be {(1, 1), (1, 2), (2, 1), (2, 2), (3, 1), (1, 3), (1, 0), (2, 0), (3, 0), (4, 0)}. (a, 0) may also correspond to single panel transmission.

[0229] In the case of supporting switching between single-panel transmission based on the first panel and single-panel transmission based on the second panel, the specific rank combination candidates may also be {(1, 1), (1, 2), (2, 1), (2, 2), (3, 1), (1, 3), (1, 0), (0, 1), (2, 0), (0, 2), (3, 0), (0.3), (4, 0), (0, 4)}. (a, 0) may also correspond to single-panel transmission based on the first panel, and (0, b) may also correspond to single-panel transmission based on the second panel.

[0230] In Alt.4-1 / Alt.4-2, (a, b) may also mean that the rank of the first panel is a, and the rank of the second panel is b.

[0231] In addition, (1, 3) and (3, 1) may not be supported, or may be configured to be supported according to UE capabilities.

[0232] In Alt.4-1 / Alt.4-2, which combination (or which combinations) become valid for DCI indication may be set / indicated by RRC / MAC CE or determined based on UE capabilities.

[0233] In Alt.4-2, which combination of (1, 0), (0, 1), (2, 0), (0, 2), (3, 0), (0.3), (4, 0), (0, 4) is supported may depend on both the UE capability and the RRC setting related to the maximum rank sent by a single panel.

[0234] Assume that the STxMP SDM scheme is instructed / set and the maximum rank of STxMP SDM (or when using multiple panels) is X. In this case, at least one of the following Alt.4A-1 to Alt.4A-3 may be applied to one or more SRIs corresponding to the first panel.

[0235] 《Alt.4A-1》

[0236] More than one SRI corresponding to the first panel may also be indicated from the SRI with rank = {1, 2, ..., X}.

[0237] 《Alt.4A-2》

[0238] More than one SRI corresponding to the first panel may also be indicated from the SRI with rank = {1, 2, ..., X-1}.

[0239] 《Alt.4A-3》

[0240] More than one SRI corresponding to the first panel may also be indicated from an SRI having rank = {1, 2, ..., X / 2} or rank = {1, 2, ..., floor(X / 2)} or rank = {1, 2, ..., ceiling(X / 2)}.

[0241] Assume that the STxMP SDM scheme is indicated / set, the maximum rank of the STxMP SDM (or when using multiple panels) is X, and the rank of the first panel is Y. In this case, for one or more SRIs corresponding to the second panel, at least one of the following Alt.4B-1 to Alt.4B-4 may also be applied.

[0242] 《Alt.4B-1》

[0243] Regardless of the rank of the first panel, one or more SRIs corresponding to the second panel may be indicated from SRIs with rank={1, 2, ..., X}. On the other hand, the UE may not expect / assume that the sum of the ranks indicated for the two panels is greater than X.

[0244] 《Alt.4B-2》

[0245] Regardless of the rank of the first panel, one or more SRIs corresponding to the second panel may also be indicated from SRIs with rank={1, 2, ..., X-1}. On the other hand, the UE may not expect / assume that the sum of the ranks indicated for the two panels is greater than X.

[0246] 《Alt.4B-3》

[0247] Independently of the rank of the first panel, one or more SRIs corresponding to the second panel may also be indicated from an SRI having rank = {1, 2, ..., X / 2} or rank = {1, 2, ..., floor(X / 2)} or rank = {1, 2, ..., ceiling(X / 2)}.

[0248] 《Alt.4B-4》

[0249] Based on the rank of the first panel, one or more SRIs corresponding to the second panel may also be indicated from the SRIs with rank = {1, 2, ..., XY}.

[0250] When Alt. 4A-2 is applied to the first panel and Alt. 4B-4 is applied to the second panel, the rank of each panel may be determined as follows.

[0251] 《Scenario 4-1》

[0252] Assume that the maximum rank = 4, the number of SRS resources (for example, configured NCB SRS resources) of the first panel = 4, and the number of SRS resources (for example, configured NCB SRS resources) of the second panel = 4.

[0253] In this case, the SRI corresponding to the first panel is indicated from rank=1 / 2 / 3.

[0254] In the case where rank=1 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2 / 3.

[0255] In the case where rank=2 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2.

[0256] In the case where rank=3 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1.

[0257] 《Scenario 4-2》

[0258] Assume that the maximum rank = 4, the number of SRS resources of the first panel = 4, and the number of SRS resources of the second panel = 2.

[0259] In this case, the SRI corresponding to the first panel is indicated from rank=1 / 2 / 3.

[0260] In the case where rank=1 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2.

[0261] In the case where rank=2 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2.

[0262] In the case where rank=3 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1.

[0263] 《Scenario 4-3》

[0264] Assume that the maximum rank = 4, the number of SRS resources of the first panel = 2, and the number of SRS resources of the second panel = 4.

[0265] In this case, the SRI corresponding to the first panel is indicated from rank=1 / 2.

[0266] In the case where rank=1 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2 / 3.

[0267] In the case where rank=2 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2.

[0268] In the case where rank=3 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1.

[0269] 《Scenario 4-4》

[0270] Assume that the maximum rank = 4, the number of SRS resources of the first panel = 4, and the number of SRS resources of the second panel = 1.

[0271] In this case, the SRI corresponding to the first panel is indicated from rank=1 / 2 / 3.

[0272] The SRI corresponding to the second panel is indicated from rank=1.

[0273] 《Scenario 4-5》

[0274] Assume that the maximum rank = 4, the number of SRS resources of the first panel = 1, and the number of SRS resources of the second panel = 4.

[0275] In this case, the SRI corresponding to the first panel is indicated from rank=1.

[0276] The SRI corresponding to the second panel is indicated from rank=1 / 2 / 3.

[0277] 《Scenario 4-6》

[0278] Assume that the maximum rank = 4, the number of SRS resources of the first panel = 2, and the number of SRS resources of the second panel = 2.

[0279] In this case, the SRI corresponding to the first panel is indicated from rank=1 / 2.

[0280] In the case where rank=1 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2.

[0281] In the case where rank=2 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2.

[0282] 《Scenario 4-7》

[0283] Assume that the maximum rank = 3, the number of SRS resources of the first panel = 4, the number of SRS resources of the second panel = 4, or,

[0284] Maximum rank = 3, the number of SRS resources of the first panel = 4, the number of SRS resources of the second panel = 2, or,

[0285] Maximum rank = 3, the number of SRS resources of the first panel = 2, the number of SRS resources of the second panel = 4, or,

[0286] The maximum rank = 3, the number of SRS resources of the first panel = 2, and the number of SRS resources of the second panel = 2.

[0287] In this case, the SRI corresponding to the first panel is indicated from rank=1 / 2.

[0288] In the case where rank=1 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1 / 2.

[0289] In the case where rank=2 is indicated for the first panel, the SRI corresponding to the second panel is indicated from rank=1.

[0290] 《Scenario 4-8》

[0291] Assume that the maximum rank = 3, the number of SRS resources of the first panel = 4, and the number of SRS resources of the second panel = 1, or,

[0292] The maximum rank = 3, the number of SRS resources of the first panel = 2, and the number of SRS resources of the second panel = 1.

[0293] In this case, the SRI corresponding to the first panel is indicated from rank=1 / 2.

[0294] The SRI corresponding to the second panel is indicated from rank=1.

[0295] 《Scenario 4-9》

[0296] Assume that the maximum rank = 3, the number of SRS resources of the first panel = 1, and the number of SRS resources of the second panel = 4, or,

[0297] The maximum rank = 3, the number of SRS resources of the first panel = 1, and the number of SRS resources of the second panel = 2.

[0298] In this case, the SRI corresponding to the first panel is indicated from rank=1.

[0299] The SRI corresponding to the second panel is indicated from rank=1 / 2.

[0300] 《Scenario 4-10》

[0301] Consider the case where the maximum rank = 2.

[0302] In this case, the SRI corresponding to the first panel is indicated from rank=1.

[0303] The SRI corresponding to the second panel is indicated from rank=1.

[0304] In addition, each panel may be configured not to support rank = 3 (for example, when a maximum rank = 4 is used when multiple panels are used, the rank of one panel is 3 and the rank of another panel is 1).

[0305] <Supplement>

[0306] At least one of the above-mentioned implementation modes may also be applied only to UEs that report a specific UE capability (UE capability) or support the specific UE capability.

[0307] The specific UE capability may also represent at least one of the following:

[0308] Support SDM mode,

[0309] Supports the combination of maximum rank and number of NCB SRS resources.

[0310] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied throughout the entire frequency (commonly regardless of the frequency), or capabilities for each frequency (for example, one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), or capabilities for each frequency range (for example, frequency range 1 (Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each feature set (Feature Set (FS)) or feature set per component carrier (Feature Set Per Component-carrier (FSPC)).

[0311] In addition, the above-mentioned specific UE capabilities can be capabilities applied in all duplex modes (commonly regardless of the duplex mode) or capabilities of each duplex mode (for example, time division duplex (TDD) and frequency division duplex (FDD)).

[0312] Furthermore, at least one of the above-mentioned embodiments may also be applied to a case where the UE is configured with specific information associated with the above-mentioned embodiments through higher layer signaling.

[0313] When the UE does not support at least one of the above-mentioned specific UE capabilities or is not configured with the above-mentioned specific information, for example, the operations of Rel.15 / 16 / 17 may also be applied.

[0314] (Note)

[0315] The following inventions are added to one embodiment of the present disclosure.

[0316] [Additional Note 1-1]

[0317] A terminal comprises: a receiving unit for receiving setting information related to a sounding reference signal (SRS) resource; and a control unit for controlling UL transmissions respectively sent from a plurality of panels using a spatial division multiplexing method based on a combination of SRS resource identifiers (SRIs) indicated by a field contained in downlink control information, wherein an association between a maximum rank supported by the UL transmission and a number of SRS resources that can be set in each panel is set or defined.

[0318] [Additional Notes 1-2]

[0319] The terminal as described in Supplement 1-1, wherein the total number of SRS resources that can be set in each of the plurality of panels is equal to or greater than the corresponding maximum rank.

[0320] [Notes 1-3]

[0321] A terminal as described in Note 1-1 or Note 1-2, wherein, in the case of UL transmission from multiple panels using the spatial division multiplexing method, the control unit assumes the number of SRS resources to be the total number of SRS resources across the multiple panels in the association between the index corresponding to the field defined in the existing system and the SRS resource identifier, and determines the SRS resources corresponding to each panel.

[0322] [Addendum 1-4]

[0323] A terminal as described in any one of Notes 1-1 to 1-3, wherein, in the case of UL transmission from multiple panels using the spatial division multiplexing method, the control unit is assumed to be not instructed to indicate only the SRI of the SRS resources corresponding to one panel or the SRI of rank 1.

[0324] [Additional Note 2-1]

[0325] A terminal comprises: a receiving unit for receiving a plurality of setting information related to a sounding reference signal (SRS) resource; and a control unit for controlling UL transmission respectively sent from a plurality of panels using a space division multiplexing method based on a combination of a plurality of SRS resource identifiers (SRIs) indicated by one or more fields contained in downlink control information, wherein an association between a maximum rank supported by the UL transmission and a number of SRS resources that can be set in each panel is set or defined.

[0326] [Additional Note 2-2]

[0327] A terminal as described in Note 2-1, wherein the first field contained in the downlink control information is indicated by the SRI corresponding to the first panel and the rank of the second panel, and the second field contained in the downlink control information is indicated by the SRI corresponding to the second panel.

[0328] [Additional Notes 2-3]

[0329] A terminal as described in Note 2-1 or Note 2-2, wherein the rank of the first panel and the rank of the second panel are indicated by a first field contained in the downlink control information, and the SRI corresponding to the first panel and the SRI corresponding to the second panel are indicated by other fields different from the first field.

[0330] [Additional Notes 2-4]

[0331] A terminal as described in any one of Supplement 2-1 to Supplement 2-3, wherein candidates for SRS resources that can be indicated by the combination of the plurality of SRIs are separately set.

[0332] (Wireless Communication System)

[0333] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0334] Fig.11 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 (may also be simply referred to as system 1) may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5GNR), and the like.

[0335] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0336] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0337] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0338] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0339] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0340] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (lower than 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (higher than 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also correspond to a frequency band higher than FR2.

[0341] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0342] Multiple base stations 10 may also be connected via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0343] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0344] The core network 30 may also include, for example, user plane functions (User Plane Function (UPF)), access and mobility management function (Access and Mobility management Function (AMF)), session management function (Session Management Function (SMF)), unified data management (Unified Data Management (UDM)), application function (Application Function (AF)), data network (Data Network (DN)), location management function (Location Management Function (LMF)), maintenance and operation management (Operation, Administration and Maintenance (OAM))) and other network functions (Network Functions (NF)). In addition, multiple functions may be provided by one network node. In addition, communication with an external network (for example, the Internet) may also be carried out via a DN.

[0345] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0346] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0347] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0348] In the wireless communication system 1, as downlink channels, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)) and the like may be used.

[0349] 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)) and the like may be used as uplink channels.

[0350] The PDSCH transmits user data, high-layer control information, system information block (SIB), etc. The PUSCH transmits user data, high-layer control information, etc. In addition, the PBCH transmits the master information block (MIB).

[0351] The PDCCH may also transmit lower layer control information. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0352] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0353] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0354] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be rewritten mutually.

[0355] Through PUCCH, uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.) and scheduling request (SR) can also be transmitted. Through PRACH, random access preambles for establishing a connection with a cell can also be transmitted.

[0356] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0357] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted as DL-RS.

[0358] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0359] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0360] (Base Station)

[0361] Fig.12 1 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0362] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0363] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0364] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0365] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0366] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0367] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0368] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0369] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0370] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0371] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0372] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0373] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0374] The sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0375] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0376] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30 (for example, the network node providing NF), other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0377] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0378] The transmitting and receiving unit 120 may also transmit setting information related to a sounding reference signal (SRS) resource. The setting information may also be one or more SRS resource candidates (or an SRS resource set) set in a plurality of panels. The control unit 110 may also control to indicate, using a field included in the downlink control information, a combination of SRS resource identifiers (SRIs) applied in UL transmissions respectively transmitted from a plurality of panels using a space division multiplexing method.

[0379] In addition, the transmitting and receiving unit 120 may also transmit a plurality of setting information related to the sounding reference signal (SRS) resource. The plurality of setting information may also be one or more SRS resource candidates (or a plurality of SRS resource sets) separately set in a plurality of panels. The control unit 110 may also control to indicate a combination of a plurality of SRS resource identifiers (SRIs) applied in UL transmissions respectively transmitted from a plurality of panels using a space division multiplexing method using one or more fields included in the downlink control information.

[0380] (User Terminal)

[0381] Fig.13 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0382] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0383] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0384] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0385] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0386] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0387] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0388] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0389] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0390] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0391] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0392] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0393] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0394] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0395] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0396] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0397] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0398] The transmitting and receiving unit 220 may also receive configuration information related to a sounding reference signal (SRS) resource. The configuration information may be one or more SRS resource candidates (or one SRS resource set) configured in a plurality of panels.

[0399] The control unit 210 may also control UL transmissions respectively transmitted from a plurality of panels using a spatial division multiplexing method based on a combination of SRS resource identifiers (SRIs) indicated by a field included in the downlink control information. An association between a maximum rank supported for UL transmission and the number of SRS resources that can be set in each panel may also be set or defined. The total number of SRS resources that can be set in a plurality of panels may also be greater than the corresponding maximum rank.

[0400] In the case of UL transmission from multiple panels using a spatial division multiplexing method, the control unit 210 may also consider the number of SRS resources as the total number of SRS resources across multiple panels in the association between the index corresponding to the field defined in the existing system (e.g., Rel. 17) and the SRS resource identifier, and determine the SRS resources corresponding to each panel. In the case of UL transmission from multiple panels using a spatial division multiplexing method, the control unit 210 may also consider that the SRI indicating only the SRS resources corresponding to one panel is not indicated, or the SRI indicating rank 1 is indicated.

[0401] The transmitting and receiving unit 220 may receive a plurality of setting information related to a sounding reference signal (SRS) resource. The plurality of setting information may be one or more SRS resource candidates (or a plurality of SRS resource sets) separately set in a plurality of panels.

[0402] The control unit 210 may also control UL transmissions respectively transmitted from a plurality of panels using a spatial division multiplexing method based on a combination of a plurality of SRS resource identifiers (SRIs) indicated by one or more fields included in the downlink control information. An association between a maximum rank supported for UL transmission and the number of SRS resources that can be set in each panel may also be set or defined.

[0403] The SRI corresponding to the first panel and the rank of the second panel may be indicated by the first field included in the downlink control information, and the SRI corresponding to the second panel may be indicated by the second field included in the downlink control information.

[0404] The rank of the first panel and the rank of the second panel may be indicated by a first field included in the downlink control information, and the SRI corresponding to the first panel and the SRI corresponding to the second panel may be indicated by other fields different from the first field.

[0405] Candidates for SRS resources that can be indicated by a combination of a plurality of SRIs may be separately set.

[0406] (Hardware Structure)

[0407] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0408] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method thereof is not particularly limited.

[0409] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.14 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0410] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be interchangeably used. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0411] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0412] Regarding the various functions in the base station 10 and the user terminal 20, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs calculations and controls the communication via the communication device 1004, or by controlling at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0413] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0414] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0415] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0416] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0417] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0418] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0419] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0420] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0421] (Variation Example)

[0422] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be rewritten with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0423] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0424] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transmitter and receiver in the frequency domain, a specific windowing process performed by a transmitter and receiver in the time domain, and the like.

[0425] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0426] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0427] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be replaced with each other.

[0428] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a 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. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0429] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0430] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0431] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0432] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0433] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than that of the long TTI and longer than 1 ms.

[0434] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0435] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0436] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0437] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0438] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0439] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0440] At least one of the set BWPs may be activated, and the UE may not assume that a specific signal / channel is transmitted or received outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0441] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0442] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, a wireless resource may also be indicated by a specific index.

[0443] In the present disclosure, the names used for parameters, etc. are not restrictive in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not restrictive in all respects.

[0444] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0445] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0446] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0447] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof.

[0448] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0449] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0450] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0451] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0452] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0453] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0454] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0455] In the present disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0456] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that performs communication services within the coverage area.

[0457] In the present disclosure, the fact that a base station sends information to a terminal may be mutually rewritten with the fact that the base station instructs the terminal to control / operate based on the information.

[0458] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0459] There are also cases where a mobile station is 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, hand set, user agent, mobile client, client or some other appropriate terminology.

[0460] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0461] The mobile body refers to a movable object, and the moving speed is arbitrary, including the case where the mobile body is stopped. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trailers, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air balloons, and objects carried on them, but is not limited to these. In addition, the mobile body can also be a mobile body that drives autonomously based on operating instructions.

[0462] The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0463] Fig.15 1 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.

[0464] The driving unit 41 is composed of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a handle), and steers at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0465] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an electronic control unit (Electronic Control Unit (ECU)).

[0466] As signals from various sensors 50-58, there are the following signals, etc.: a current signal from a current sensor 50 for sensing the current of a motor, a speed signal of the front wheels 46 / rear wheels 47 obtained by a speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of an accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of a brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of a shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0467] The information service unit 59 is composed of various devices such as a navigation system, an audio system, a speaker, a display, a television, and a radio for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information obtained from an external device via the communication module 60 and the like to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0468] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0469] The driving assistance system unit 64 is composed of various devices such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning detector (for example, Global Navigation Satellite System (GNSS)), map information (for example, High Definition (HD) map, Autonomous Vehicle (AV) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS))), artificial intelligence (AI) chip, AI processor, etc., for providing functions for preventing accidents before they happen or reducing the driving burden of the driver, and one or more ECUs for controlling these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 to realize the driving assistance function or the automatic driving function.

[0470] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) with the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 of the vehicle 40 via the communication port 63.

[0471] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received with the external device via wireless communication. The communication module 60 can be inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it can also function as at least one of the base station 10 and user terminal 20).

[0472] The communication module 60 may also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, the information obtained based on the signals, and the information based on the input from the outside (user) obtained via the information service unit 59 to the external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted by the communication module 60 may also include information based on the above input.

[0473] The communication module 60 receives various information (traffic information, signal information, vehicle information, etc.) sent from an external device, and displays it on the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit for outputting information (for example, outputting information to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0474] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc., which are provided in the vehicle 40.

[0475] In addition, the base station in the present disclosure may also be rewritten as a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink", "downlink", etc. may also be rewritten as terms corresponding to communication between terminals (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may also be rewritten as sidelink channels.

[0476] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0477] In the present disclosure, operations are assumed to be performed by a base station, and sometimes by its upper node depending on the situation. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal can obviously be performed by a base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0478] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, timings, flow charts, etc. of the various methods / implementations described in this disclosure may be swapped in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0479] The various modes / implementations described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems that are expanded, modified, created, or specified based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0480] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0481] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0482] The term "determining" used in the present disclosure may include a variety of operations. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0483] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0484] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as a situation where "judgment (decision)" is performed. That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as a situation where "judgment (decision)" is performed.

[0485] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0486] The “maximum transmit power” recorded in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0487] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be rewritten as "access".

[0488] In the present disclosure, when two elements are connected, it is possible to consider using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, using electromagnetic energy with a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. to be "connected" or "combined" to each other.

[0489] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same manner as "different".

[0490] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0491] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0492] In the present disclosure, "below", "less than", "above", "more than", "equal to", etc. may also be rephrased with each other. Furthermore, in the present disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. are not limited to the original comparative and superlative levels, but may also be rephrased with each other. Furthermore, in the present disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. as expressions with "i" (i is an arbitrary integer) are not limited to the original comparative and superlative levels, but may also be rephrased with each other (for example, "highest" may also be rephrased with "i-th highest").

[0493] In the present disclosure, “of,” “for,” “regarding,” “related to,” “associated with,” etc. may be replaced by each other.

[0494] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A receiving unit, receiving setting information related to a sounding reference signal SRS resource; and A control unit controls UL transmissions respectively transmitted from a plurality of panels using a space division multiplexing method based on a combination of SRS resource identifiers SRI indicated by a field included in the downlink control information, The association between the maximum rank supported for the UL transmission and the number of SRS resources that can be set in each panel is set or defined.

2. The terminal according to claim 1, wherein: The total number of SRS resources that can be set in each of the plurality of panels is equal to or greater than the corresponding maximum rank.

3. The terminal according to claim 1, wherein: In the case of UL transmission from multiple panels using the spatial division multiplexing method, the control unit assumes the number of SRS resources to be the total number of SRS resources across the multiple panels in the association between the index corresponding to the field defined in the existing system and the SRS resource identifier, and determines the SRS resources corresponding to each panel.

4. The terminal according to claim 1, wherein: In the case of performing UL transmission from a plurality of panels using the spatial division multiplexing method, the control unit is assumed to not be instructed to indicate an SRI indicating only an SRS resource corresponding to one panel or an SRI indicating rank 1.

5. A wireless communication method of a terminal, comprising: The step of receiving setting information related to sounding reference signal SRS resources; and The step of controlling UL transmissions respectively transmitted from a plurality of panels using a space division multiplexing method based on a combination of SRS resource identifiers SRI indicated by a field included in the downlink control information, The association between the maximum rank supported for the UL transmission and the number of SRS resources that can be set in each panel is set or defined.

6. A base station, comprising: A sending unit, sending setting information related to a sounding reference signal SRS resource; and The control unit controls to indicate, using a field included in the downlink control information, a combination of SRS resource identifiers SRIs to be applied in UL transmissions respectively transmitted from a plurality of panels using a space division multiplexing method, The association between the maximum rank supported for the UL transmission and the number of SRS resources that can be set in each panel is set or defined.

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