Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit that determines a panel corresponding to a measurement reference signal (Sounding Reference Signal (SRS)) resource set or an SRS resource based on a high-layer parameter; and a sending unit that uses the determined panel to send an SRS in the SRS resource set or the SRS resource. According to one embodiment of the present disclosure, the correspondence between the panel and the SRS can be appropriately determined.

Description

Technical Field

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

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

[0003] The subsequent systems of LTE (for example, also called fifth generation mobile communication system (5G), 5G+(plus), sixth 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 NR, the use of measurement reference signals (Sounding Reference Signal (SRS)) covers many aspects. NR's SRS is not only used for uplink (UL) CSI measurement, but also for downlink (DL) CSI measurement, beam management, etc.

[0009] However, there has been no progress in the study of the relationship between SRS and the panel of the user terminal (user equipment (UE)). If this is not clear, the base station cannot understand whether a certain SRS is sent using the same panel as other SRSs or using different panels. In this case, the SRS measurement results in the base station cannot be properly used, so appropriate scheduling is not performed, and there is a concern that communication throughput and communication quality will deteriorate.

[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 determine the correspondence relationship between a panel and an SRS.

[0011] Means for solving problems

[0012] A terminal involved in one method of the present disclosure comprises: a control unit, which determines a panel corresponding to a measurement reference signal (Sounding Reference Signal (SRS)) resource set or an SRS resource based on high-level parameters; and a sending unit, which uses the determined panel to send an SRS in the SRS resource set or the SRS resource.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, the correspondence relationship between the panel and the SRS can be appropriately determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing an example of spatial relationship information of SRS.

[0016] Figure 2A as well as Figure 2B This is a diagram showing an example of the correspondence between SRS resource sets and panels in Implementation 1.1.

[0017] FIG. 3A to FIG. 3C This is a diagram showing an example of the correspondence between SRS resources and panels in Implementation 1.2.

[0018] Figure 4This is a diagram showing an example of the configuration of an SRS resource set in Implementation 2.1.

[0019] Figure 5 This is a diagram showing an example of the configuration of SRS resources in Implementation 2.2.

[0020] Figure 6 This is a diagram showing an example of setting the spatial relationship information of the SRS in Implementation 2.2.

[0021] Fig. 7A as well as Figure 7B This is a diagram showing an example of the configuration of an SRS resource set in a combination of the first embodiment and the second embodiment.

[0022] Fig. 8A as well as Figure 8B This is a diagram showing an example of the assumption of whether or not SRS can be transmitted simultaneously in Implementation 3.1.

[0023] Fig.9A as well as Fig. 9B This is a diagram showing an example of the assumption of whether or not SRS can be transmitted simultaneously in Implementation 3.2.

[0024] Fig.10 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0025] Fig.11 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0026] Fig.12 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0027] Fig.13 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0028] (SRS)

[0029] In NR, the use of measurement reference signals (Sounding Reference Signal (SRS)) covers many aspects. NR's SRS is not only used for uplink (UL) CSI measurement, which is also used in existing LTE (LTE Rel.8-14), but is also used for downlink (DL) CSI measurement, beam management, etc.

[0030] The UE may also be configured with one or more SRS resources. The SRS resources may also be identified by an SRS Resource Index (SRI).

[0031] Each SRS resource may also have one or more SRS ports (may also correspond to one or more SRS ports). For example, the number of ports of each SRS may be 1, 2, 4, etc.

[0032] The UE may also be configured with one or more SRS resource sets. An SRS resource set may also be associated with a specific number of SRS resources. With respect to the SRS resources included in an SRS resource set, the UE may also use high-level parameters in common. In addition, the resource set in the present disclosure may also be replaced by a set, a resource group, a group, etc.

[0033] Information related to SRS resources or resource sets may also be set to the UE using higher layer signaling, physical layer signaling, or a combination thereof.

[0034] In addition, in the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0035] MAC signaling may also use, for example, MAC Control Element (MAC CE), 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.

[0036] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)).

[0037] The SRS configuration information (eg, "SRS-Config" of the RRC information element) may also include SRS resource set configuration information, SRS resource configuration information, and the like.

[0038] SRS resource set setting information (for example, the RRC parameter "SRS-ResourceSet") may also include the SRS resource set ID (identifier) ​​(SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, the SRS resource type (resourceType), and information on the usage of SRS.

[0039] Here, the SRS resource type can also represent the action in the time domain of the SRS resource setting (same time domain behavior), or it can represent any one of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic SRS (A-SRS). In addition, the UE can also periodically (or periodically after activation) send P-SRS and SP-SRS. The UE can also send A-SRS based on the SRS request of the DCI.

[0040] In addition, the purpose of SRS (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may be, for example, beam management, codebook, non-codebook, antenna switching, etc. For example, SRS for codebook or non-codebook purposes may also be used to determine the precoder transmitted by a codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on SRI.

[0041] SRS for beam management purposes can also be assumed that for each SRS resource set, only one SRS resource can be sent at a given time instant. In addition, in the same bandwidth part (Bandwidth Part (BWP)), when multiple SRS resources corresponding to the same time domain action belong to different SRS resource sets, these SRS resources can also be sent simultaneously.

[0042] SRS resource setting information (for example, the "SRS-Resource" of the RRC parameter) may also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, sending comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS code elements, SRS bandwidth, etc.), hopping association information, SRS resource type, sequence ID, spatial relationship information, etc.

[0043] The UE may switch the bandwidth part (Bandwidth Part (BWP)) for transmitting the SRS for each time slot, or may switch the antenna. In addition, the UE may apply at least one of intra-slot hopping and inter-slot hopping to SRS transmission.

[0044] (Spatial Relationship)

[0045] In NR, the UE can also control the transmission processing (for example, at least one of transmission, mapping, precoding, modulation, and coding) of at least one of the uplink channels and signals (also expressed as "channel / signal". Hereinafter, "A / B" can also be replaced by "at least one of A and B") based on a specific spatial relation.

[0046] In addition, the spatial relationship can also be replaced by Quasi-Co-Location (QCL), QCL assumption, Transmission Configuration Indication state (TCI state), beam, etc.

[0047] The spatial relationship applied to a specific channel / signal can also be determined by spatial relationship information (Spatial Relation Information (SRI)) notified (set) using high-level signaling. The spatial relationship information of the SRS (e.g., the "spatialRelationInfo" of the RRC parameter) can also indicate the spatial relationship information between a specific reference signal (Reference Signal (RS)) and the SRS.

[0048] The specific reference signal may also be at least one of a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (CSI-RS)), and a measurement reference signal (Sounding Reference Signal (SRS)). Here, SSB may also be referred to as a synchronization signal / broadcast channel (Synchronization Signal / PhysicalBroadcast Channel (SS / PBCH)) block.

[0049] Figure 1 This is a diagram showing an example of spatial relationship information of SRS. This example is described using Abstract Syntax Notation One (ASN.1) notation (it is only an example and therefore not a complete description).

[0050] In this example, the spatial relationship information of SRS (for example, "SRS-SpatialRelationInfo" of RRC information element (Information Element (IE))) may also include at least one of SSB index, CSI-RS resource ID, and SRS resource ID as an index of the above-mentioned specific reference signal (reference RS (parameter "referenceSignal")).

[0051] In addition, in the present disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSBRI) may also be replaced 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 replaced with each other. In addition, the SRS index, SRS resource ID, and SRI may also be replaced with each other.

[0052] The configured SRI 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 specific RS. In addition, the SRI may also include a serving cell index, a bandwidth part (Bandwidth Part (BWP)) ID, etc. corresponding to the specific RS.

[0053] In addition, in the present disclosure, index, ID, indicator, resource ID, etc. can also be replaced with each other.

[0054] When the spatial relationship information related to SSB or CSI-RS and SRS is set for a certain SRS resource, the UE may also use the same spatial domain filter as the spatial domain filter used for receiving the SSB or CSI-RS to send the SRS resource. In other words, in this case, the UE may also assume that the UE receiving beam of the SSB or CSI-RS is the same as the UE transmitting beam of the SRS.

[0055] When the UE is set with spatial relationship information related to other SRS (reference SRS) and the SRS (target SRS) for a certain SRS (target SRS) resource, the UE may also use the same spatial domain filter as the spatial domain filter used for sending the reference SRS to send the target SRS resource. In other words, 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.

[0056] In addition, the spatial domain filter used for transmission of the base station, the downlink spatial domain transmission filter, and the transmission beam of the base station can also be replaced with each other. The spatial domain filter used for reception of the base station, the uplink spatial domain receive filter, and the reception beam of the base station can also be replaced with each other.

[0057] In addition, the spatial domain filter used for UE transmission, the uplink spatial domain transmission filter, and the UE's transmission beam can also be replaced with each other. The spatial domain filter used for UE reception, the downlink spatial domain receive filter, and the UE's receive beam can also be replaced with each other.

[0058] In addition, the spatial relationship information (SRI) may correspond to a beam. For example, the UE may assume that UL transmissions corresponding to different SRIs are transmitted using different beams.

[0059] The beam indication for the uplink control channel (Physical Uplink Control Channel (PUCCH)) can also be set through high-layer signaling. For example, when the PUCCH spatial relationship information includes a spatial relationship information (SpatialRelationInfo) parameter, the UE can also apply the set parameter to the PUCCH. When the PUCCH spatial relationship information includes more than one spatial relationship information parameter, the parameter applied (activated) to the PUCCH can also be determined based on the MAC CE.

[0060] In addition, the spatial relationship information of the PUCCH may be information obtained by replacing the SRS with the PUCCH in the above-mentioned spatial relationship information of the SRS, and therefore, the description thereof will not be repeated.

[0061] The beam indication for PUSCH can also be determined based on the SRS Resource Indicator (SRI) field included in the DCI. The UE can also transmit PUSCH using the same transmission beam as the corresponding SRS in the SRS set by the higher layer based on the specified SRI. In addition, the beam indication for SRS can also be the same.

[0062] For example, a UE configured with codebook-based PUSCH transmission may determine (select) the SRS usage and SRS resources included in the SRS resource set corresponding to the codebook based on the SRI field of the DCI.

[0063] A UE configured with non-codebook-based PUSCH transmission may determine (select) the usage of the SRS and the SRS resources included in the non-codebook-based SRS resource set based on the SRI field of the DCI.

[0064] In addition, the number of SRS resources included in the SRS resource set corresponding to the codebook and the number of SRS resources included in the SRS resource set corresponding to the non-codebook may also be different, for example, the former may be 2 and the latter may be 4. In this case, the SRI field size may be 1 bit for the former and 2 bits for the latter.

[0065] (Multiple panels)

[0066] For future wireless communication systems (eg, Rel. 17NR), uplink (UL) beam selection for UEs with multiple panels (multi-panel) is being studied.

[0067] For example, when the UE has the beam correspondence (BC) capability (e.g., RRC parameter "beamCorrespondenceWithoutUL-BeamSweeping"), the UE can also autonomously determine the appropriate UL beam based on DL measurements (e.g., DL reference signal measurements) without UL beam scanning.

[0068] In addition, when the UE does not have the above capabilities, the UE may also perform UL beam scanning. The SRS for beam management is usually determined autonomously by the UE and is used in beam scanning based on the SRS. The SRS for beam management may not be set / specified by the base station for spatial relationship information.

[0069] However, as described above, the SRS for beam management (beam management) may be assumed to be transmittable at a specific time for each SRS resource set only one SRS resource.

[0070] However, there has been no progress in the research on the relationship between SRS and UE panels. If this is not clear, the base station cannot understand whether a certain SRS is sent using the same panel as other SRSs or using different panels. In this case, the SRS measurement results in the base station cannot be properly used, so appropriate scheduling is not performed, and there is a concern that communication throughput and communication quality will deteriorate.

[0071] Therefore, the inventors of the present invention have conceived a method for properly implementing panel specific SRS transmission.

[0072] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0073] In addition, in the present disclosure, activation, deactivation, indication, selection, update, determination, etc. may also be replaced with each other. In addition, in the present disclosure, sequence, list, set, group, etc. may also be replaced with each other.

[0074] In addition, in the present disclosure, the panel, uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (COntrol REsource SET (CORESET)), PDSCH, codeword, base station, specific antenna port (for example, demodulation reference signal (DeModulation Reference Signal (DMRS)) port), specific antenna port group (for example, DMRS port group), specific group (for example, code division multiplexing (Code Division Multiplexing (CDM)) group, specific reference signal group, CORESET group), CORESET pool, etc. can also be replaced with each other.

[0075] In addition, the panel identifier (Identifier (ID)) and the panel can also be replaced with each other. In other words, the TRP ID and TRP, the CORESET group ID and the CORESET group, etc. can also be replaced with each other. The ID and the index can also be replaced with each other.

[0076] In the following embodiments, an SRS resource set for purpose = beam management may be replaced with an SRS resource set for a specific purpose (eg, codebook, non-codebook), an SRS resource set for the same purpose, and the like.

[0077] In addition, the panel of the present disclosure may also be replaced with an activated panel. In addition, the panel ID of the present disclosure may also be replaced with an SRS resource set group ID, an antenna group ID, other IDs, etc. The panel ID may also be transparent to the base station (gNB). In this case, the base station may know which SRS resource sets are sent through the same or different panels, for example.

[0078] (Wireless Communication Method)

[0079] <First embodiment>

[0080] The first embodiment corresponds to the following situation: the base station implicitly sets / instructs the UE about the SRS resource set / the relationship between the SRS resource and the panel whose purpose is beam management.

[0081] [Implementation method 1.1]

[0082] In implementation 1.1, the above relationship is the relationship between an SRS resource set and a panel. The UE may also associate an SRS resource set with a panel based on the order of the SRS resource set IDs. In implementation 1.1, all SRS resources in a certain SRS resource set are associated with the same panel.

[0083] The UE can also imagine that, when the SRS resource set IDs whose purpose = beam management are arranged from smaller (or larger) to form a group of k, the i-th k SRS resource set IDs are associated with the i-th panel when the panel IDs are arranged from smaller (or larger) (implementation method 1.1.1).

[0084] In other words, the UE may also assume that each fixed number (eg, k) of usages=beam management SRS resource set IDs in ascending or descending order are associated with the panel IDs in ascending or descending order.

[0085] In addition, the above-mentioned k value may be pre-defined through specifications, may be notified to the UE through high-layer signaling, physical layer signaling or a combination thereof, or may be determined based on UE capabilities.

[0086] The UE may also assume that, when the SRS resource set IDs of the purpose = beam management corresponding to the same time domain action (in other words, the same resource type) are arranged from smaller (or larger) to form a group of k, the i-th k SRS resource set IDs are associated with the panel whose panel ID is the i-th panel from smaller (or larger) (implementation mode 1.1.2). In other words, an SRS resource set corresponding to an action in a different time domain may also be associated with a certain panel ID.

[0087] Figure 2A as well as Figure 2B This is a diagram showing an example of the correspondence relationship between SRS resource sets and panels in Embodiment 1.1. In this example, it is assumed that k=1.

[0088] Figure 2A This is equivalent to Embodiment 1.1.1. In this example, SRS resource set IDs = 0, 1, 2, and 3 correspond to usage = beam management (BM), codebook (CB), BM, and non-codebook (NCB), respectively.

[0089] Figure 2A In the SRS resource set IDs 0 and 2 corresponding to the SRS resource set for purpose = beam management, the smaller ID = 0 is associated with the panel ID = 0, and the larger ID = 2 is associated with the panel ID = 1. The SRS resource set IDs for other purposes may be associated with the panel by the same rule, by other methods, or not associated with the panel.

[0090] Figure 2B This is equivalent to implementation mode 1.1.2. Figure 2BIn the figure, the SRS resource sets ID = 0, 2, and 5 are all SRS resource sets with purpose = beam management, but the resource types of ID = 0 and 5 are periodic, and the resource type of ID = 2 is aperiodic. In this case, the smaller ID = 0 of the SRS resource sets ID = 0 and 5 with resource type = periodic is associated with panel ID = 0, and the larger ID = 5 is associated with panel ID = 1. In addition, the SRS resource set ID = 2 with resource type = aperiodic is associated with the smaller panel ID = 0.

[0091] [Implementation method 1.2]

[0092] In Embodiment 1.2, the above relationship is a relationship between SRS resources and panels. The UE may also assume that the SRS resources and panels are associated with each other based on the order of the SRS resource IDs.

[0093] The UE can also be imagined that, when the SRS resource IDs included in all SRS resource sets with purpose = beam management are arranged from smaller (or larger) to form a group of k, the i-th k SRS resource IDs are associated with the i-th panel when the panel IDs are arranged from smaller (or larger) (implementation method 1.2.1).

[0094] In other words, the UE may also assume that the SRS resource IDs included in all SRS resource sets of each certain number (eg, k) of usages = beam management in ascending or descending order are associated with the panel IDs in ascending or descending order.

[0095] In addition, the above-mentioned k value may be pre-defined through specifications, may be notified to the UE through high-layer signaling, physical layer signaling or a combination thereof, or may be determined based on UE capabilities.

[0096] The UE may also assume that, when the SRS resource IDs included in all SRS resource sets corresponding to the same time domain action (in other words, the same resource type) for the purpose = beam management are arranged from smaller (or larger) to form a group of k, the i-th k SRS resource IDs are associated with the i-th panel when the panel IDs are arranged from smaller (or larger) (implementation mode 1.2.2). In other words, the SRS resource IDs included in the SRS resource sets corresponding to actions in different time domains may also be associated with a certain panel ID.

[0097] In addition, the UE may also assume that, for each SRS resource set, the SRS resource IDs contained in the SRS resource set whose purpose = beam management are arranged from smaller to larger to form a group of k, and the i-th k SRS resource IDs are associated with the i-th panel when the panel IDs are arranged from smaller to larger (or from larger) (implementation method 1.2.3).

[0098] FIG. 3A to FIG. 3C This is a diagram showing an example of the correspondence relationship between SRS resources and panels in Embodiment 1.2. In this example, it is assumed that k=2 as described above.

[0099] Figure 3A This is equivalent to implementation method 1.2.1. Figure 3A In the example, the SRS resource set with SRS resource set ID=0 for usage=beam management includes SRS resources with SRS resource ID=0 and 1. In addition, the SRS resource set with SRS resource set ID=2 for usage=beam management includes SRS resources with SRS resource ID=4 and 5.

[0100] Figure 3A In the example, among the above-mentioned SRS resource IDs = 0, 1, 4, 5, k (= 2) IDs = 0 and 1 from the smaller one are associated with panel ID = 0, and the larger IDs = 4 and 5 are associated with panel ID = 1.

[0101] Figure 3B This is equivalent to implementation mode 1.2.2. Figure 3B In the figure, the SRS resource set IDs = 0, 2, and 5 are all SRS resource sets with purpose = beam management, but the resource types of ID = 0 and 5 are periodic, and the resource type of ID = 2 is non-periodic. The SRS resource set with SRS resource set ID = 0 includes SRS resources with SRS resource IDs = 0 and 1. In addition, the SRS resource set with SRS resource set ID = 2 includes SRS resources with SRS resource IDs = 4 and 5. In addition, the SRS resource set with SRS resource set ID = 5 includes SRS resources with SRS resource ID = 6.

[0102] Figure 3B In the example, among the SRS resource IDs = 0, 1, and 6 included in the SRS resource set of resource type = periodic (SRS resource set IDs = 0 and 5), k (=2) SRS resource IDs = 0 and 1 from the smaller side are associated with panel ID = 0, and the larger SRS resource ID = 6 is associated with panel ID = 1. In addition, among the SRS resource IDs = 4 and 5 included in the SRS resource set of resource type = non-periodic (SRS resource set ID = 2), k (=2) SRS resource IDs = 4 and 5 from the smaller side are associated with panel ID = 0.

[0103] Figure 3C This is equivalent to implementation method 1.2.3. Figure 3C In the example, the SRS resource set with the SRS resource set ID = 0 for purpose = beam management includes the SRS resources with the SRS resource IDs = 0 and 1. In addition, the SRS resource set with the SRS resource set ID = 2 for purpose = beam management includes the SRS resources with the SRS resource IDs = 4 and 5. In addition, the SRS resource set with the SRS resource set ID = 5 for purpose = beam management includes the SRS resources with the SRS resource IDs = 6 and 7.

[0104] Figure 3C In the example of , for each SRS resource set, k (=2) SRS resource IDs from the smallest one (in this example, all resource IDs shown in the figure) are associated with panel ID=0.

[0105] In addition, in implementations 1.1 and 1.2, the SRS resource set ID may also be replaced by an SRS resource set ID corresponding to an activated (or triggered, updated, or indicated) SRS resource set. For example, a P-SRS / SP-SRS resource set may also be activated via a MAC CE, and an A-SRS resource set may also be triggered via a DCI.

[0106] In addition, the association between the SRS resource set ID or the SRS resource ID and the panel ID may also be a one-to-one mapping. The UE may also not expect that more SRS resource sets / SRS resource IDs are set or activated than the number of panels it has. The UE may also use the UE capability information to report the number of panels it has (supports).

[0107] According to the first embodiment described above, the UE and the base station can appropriately determine the panel corresponding to SRS transmission.

[0108] <Second embodiment>

[0109] The second embodiment corresponds to the following situation: the base station explicitly sets / instructs the UE about the SRS resource set / the relationship between the SRS resource and the panel whose purpose is beam management.

[0110] [Implementation method 2.1]

[0111] In Embodiment 2.1, the above relationship is a relationship between an SRS resource set and a panel. The UE may also assume that a panel ID associated with an SRS resource set is set through RRC signaling. In Embodiment 2.1, all SRS resources in a certain SRS resource set are associated with the same panel.

[0112] Figure 4This is a diagram showing an example of the configuration of the SRS resource set in Implementation 2.1. In this example, the configuration of the SRS resource set of Rel.15NR (RRC information element "SRS-ResourceSet") uses "SRS-ResourceSet-r17" as another information element, but the name is not limited to this.

[0113] Figure 4 The setting of the SRS resource set includes information of the panel ID (Panel-ID). In this way, the panel ID associated with the SRS resource set is set. In addition, this information may also be an integer type, for example.

[0114] [Implementation method 2.2]

[0115] In Embodiment 2.2, the above relationship is a relationship between SRS resources and panels. The UE may also assume that a panel ID associated with an SRS resource is set through RRC signaling.

[0116] Figure 5 This is a diagram showing an example of the configuration of the SRS resource in Implementation 2.2. In this example, the configuration of the SRS resource of Rel.15NR (RRC information element "SRS-Resource") uses "SRS-Resource-r17" as another information element, but the name is not limited to this.

[0117] Figure 5 The setting of the SRS resource includes information of the panel ID (Panel-ID). In this way, the panel ID associated with the SRS resource is set. In addition, this information may be, for example, an integer type.

[0118] Figure 6 This is a diagram showing an example of the configuration of the spatial relationship information of the SRS in Implementation 2.2. In this example, the configuration of the spatial relationship information of the SRS of Rel.15NR (RRC information element "SRS-SpatialRelationInfo") uses "SRS-SpatialRelationInfo-r17" as another information element, but the name is not limited to this.

[0119] Figure 6 The setting of the spatial relationship information of the SRS includes information of the panel ID (Panel-ID). Based on the spatial relationship information associated with the SRS resource, the panel ID associated with the SRS resource is set.

[0120] [Implementation method 2.3]

[0121] In implementation mode 2.3, the above relationship is the relationship between the reference RS (eg, CSI-RS, SSB, SRS) of the spatial relationship information associated with the SRS resource and the panel.

[0122] The UE may also be assumed to be configured (indicated, notified) of the relationship between the CSI-RS / SSB and the panel as the reference RS through RRC signaling / MAC CE / DCI. The UE may also use the panel corresponding to the reference RS (CSI-RS / SSB) of the spatial relationship information associated with the SRS resource to send the SRS resource.

[0123] In addition, the UE may also autonomously determine the panel for receiving CSI-RS / SSB and report it to the base station. The UE may also transmit the SRS resource using the panel determined for the reference RS of the spatial relationship information associated with the SRS resource.

[0124] The UE may also assume that the relationship between the SRS set as the reference RS and the panel is set (indicated, notified). The UE may also transmit the SRS resource using the panel corresponding to the reference RS (other SRS) of the spatial relationship information associated with the SRS resource.

[0125] In addition, the UE may autonomously determine a panel for transmitting the SRS and report it to the base station. The UE may also transmit the SRS resource using a panel determined for a reference RS (other SRS) of spatial relationship information associated with the SRS resource.

[0126] [Implementation method 2.4]

[0127] Embodiment 2.4 is a combination of at least two of Embodiments 2.1 to 2.3.

[0128] The UE may not expect to determine different panels based on the combination of Embodiments 2.1 to 2.3. In this case, the UE may also assume that, with respect to one SRS resource set / SRS resource, one panel is determined based on any one of Embodiments 2.1 to 2.3.

[0129] The UE may also allow different panels to be determined based on a combination of embodiments 2.1-2.3. In this case, the UE may also assume that, with respect to one SRS resource set / SRS resource, one panel is determined based on a certain rule from a plurality of panels determined based on at least one of embodiments 2.1-2.3.

[0130] For example, when the panel set by the spatial relationship information of the SRS in implementation mode 2.2 is different from the panel associated with the reference RS in implementation mode 2.3 for a certain SRS resource, the UE may apply the former or the latter panel to the SRS resource.

[0131] The above rules may also be applied in any order to the determination methods described in implementation modes 2.1, 2.2, and 2.3.

[0132] For example, when there are both a setting of a panel for an SRS resource set (implementation 2.1) and a setting of a panel for SRS resources included in the SRS resource set (implementation 2.2), the UE may apply the former or the latter panel to the SRS resource set / SRS resources.

[0133] According to the second embodiment described above, the UE and the base station can appropriately determine the panel corresponding to SRS transmission.

[0134] [Modification of the Second Embodiment]

[0135] The first embodiment and the second embodiment may be used in combination. For example, the second embodiment may be used for an SRS resource set / SRS resource with an explicitly set panel ID, and the first embodiment may be used for an SRS resource set / SRS resource with no such panel ID.

[0136] For an SRS resource set / SRS resource for which a panel ID is not explicitly set, the panel ID may also be determined according to at least one of the following:

[0137] (Variant 1) Default settings common to all SRS resource sets / SRS resources,

[0138] (Variant 2) Order of SRS resource set ID / SRS resource ID.

[0139] The default setting (default panel) of Modification 1 may be predetermined by the specification, may be set by higher layer signaling, or may be determined based on UE capabilities. For example, the default panel may be the panel with the smallest or largest panel ID.

[0140] Regarding the above-mentioned order of variant example 2, the UE can also imagine that, in a case where SRS resource set IDs / SRS resource IDs whose purpose = beam management and for which the panel ID is not explicitly set are arranged from smaller to larger to form a group of k, the i-th k SRS resource set IDs / SRS resource IDs are associated with the i-th panel when the panel IDs are arranged from smaller to larger.

[0141] Fig. 7Aas well as Figure 7B This is a diagram showing an example of the configuration of the SRS resource set in the combination of the first embodiment and the second embodiment. In this example, it is assumed that k = 1. The SRS resource sets shown in the figure are all for the purpose = beam management.

[0142] Fig. 7A This is equivalent to the above-mentioned modification example 1. Fig. 7A , SRS resource sets of SRS resource set IDs = 0, 1, and 2 are configured for UE. Here, panel ID = 0 is configured in association with SRS resource set ID = 0, and panel ID = 2 is configured in association with SRS resource set ID = 1. On the other hand, panel ID associated with SRS resource set ID = 2 is not configured.

[0143] Fig. 7A In the example, the UE may also assume that the SRS resource set ID = 0 and 1 with the set panel ID are associated with the set panel ID. On the other hand, the UE assumes that the SRS resource set ID = 2 with no set panel ID is associated with the default panel ID (here, the panel ID of the largest panel ID = 2).

[0144] Figure 7B This is equivalent to the above-mentioned variation 2. Figure 7B , the SRS resource sets of SRS resource set IDs = 0, 1, 2, and 3 are configured for the UE. Here, panel ID = 0 is configured in association with SRS resource set ID = 0, and panel ID = 2 is configured in association with SRS resource set ID = 1. On the other hand, panel IDs associated with SRS resource set IDs = 2 and 3 are not configured.

[0145] Figure 7B In the example, the UE assumes that the SRS resource sets ID = 0 and 1 with the set panel ID are associated with the set panel ID. On the other hand, the UE assumes that the SRS resource sets ID = 2 and 3 without the set panel ID are implicitly associated with the panel ID = 0 and 1, respectively, according to the rules of the above-mentioned variant example 2.

[0146] In addition, the RRC signaling for explicitly setting the panel ID in the second embodiment may also be replaced by a MAC CE / DCI for activating (or updating, indicating) the panel ID.

[0147] <Third Embodiment>

[0148] The third embodiment relates to a process of UE related to SRS transmission (control of whether or not to simultaneously transmit SRS).

[0149] The third embodiment can also be applied to the case where the UE is configured with new RRC parameters (for example, multi-panel operation, panel ID described in the second embodiment, etc.). If this is not the case, the operation of Rel.15NR can also be applied.

[0150] Here, the operation (concept) of Rel.15NR may also be at least one of the following:

[0151] For beam management purposes, it is also possible to assume that only one SRS resource can be transmitted at a specific time for each SRS resource set. In addition, in the same BWP, when multiple SRS resources corresponding to the same time domain operation belong to different SRS resource sets, these SRS resources may be transmitted simultaneously.

[0152] When a resource type of a non-periodic SRS resource is triggered on an OFDM symbol for which P-SRS / SP-SRS transmission is configured, the UE transmits the non-periodic SRS resource and discards the P-SRS / SP-SRS symbol that overlaps with the non-periodic SRS resource (the non-overlapping portion is transmitted).

[0153] When a semi-persistent SRS resource is triggered on an OFDM symbol for which P-SRS transmission is set, the UE transmits the SP-SRS resource and discards the P-SRS symbol overlapping with the SP-SRS resource (the non-overlapping part is transmitted).

[0154] [Implementation method 3.1]

[0155] Like Embodiments 1.1, 2.1, and the like, Embodiment 3.1 corresponds to a case where a panel for SRS transmission is set / indicated for each SRS resource set.

[0156] In implementation 3.1, when the high-level parameter "usage" is set to beam management, only one SRS resource in each of multiple SRS sets (SRS resource sets) is sent at a given instant. On the other hand, SRS resources in different SRS resource sets associated with different panels may also be sent simultaneously (implementation 3.1.1).

[0157] In implementation mode 3.1, when the high-level parameter "usage" is set to beam management, only one SRS resource in each of multiple SRS sets (SRS resource sets) may be transmitted at a certain time. On the other hand, SRS resources in different SRS resource sets associated with different panels and corresponding to the same time domain operation may also be transmitted simultaneously (implementation mode 3.1.2).

[0158] The control of whether or not SRS can be transmitted simultaneously is the same as Rel.15NR if implementation mode 3.1.2 is followed, but if implementation mode 3.1.1 is followed, it can be expected that more situations in which simultaneous transmission is allowed are compared to Rel.15NR.

[0159] Fig. 8A as well as Figure 8B This is a diagram showing an example of the assumption of whether or not SRS can be transmitted simultaneously in Implementation 3.1.

[0160] Fig. 8A This is equivalent to implementation method 3.1.1. Fig. 8A , it is shown that SRS resource set #1 including SRS resources #1-#5 and SRS resource set #2 including SRS resources #6-#10 are set to the UE. Here, it is assumed that both SRS resource sets #1 and #2 have the purpose = beam management and are associated with panels #1 and #2, respectively. In this example, the resource types of SRS resource sets #1 and #2 can be the same or different.

[0161] Fig. 8A In the example, the UE assumes that only one SRS resource (eg, SRS resources #1 to #5) in the same SRS resource set can be sent at a time (in other words, multiple SRS resources cannot be sent simultaneously using the same panel).

[0162] also, Fig. 8A In the example of , the UE assumes that SRS resources between different SRS resource sets (for example, SRS resources #1 and #6) can be sent simultaneously.

[0163] Figure 8B This is equivalent to implementation method 3.1.2. Figure 8B , it is shown that SRS resource set #1 including SRS resources #1-#5, SRS resource set #2 including SRS resources #6-#10, and SRS resource set #3 including SRS resources #11-#15 are configured as UE. Here, it is assumed that SRS resource sets #1, #2, and #3 are all of purpose = beam management, but the resource types are periodic, periodic, and non-periodic, respectively, and are associated with panels #1, #2, and #2, respectively.

[0164] Figure 8B In the example, the UE assumes that only one SRS resource (eg, SRS resources #1 to #5) in the same SRS resource set can be sent at a time (in other words, multiple SRS resources cannot be sent simultaneously using the same panel).

[0165] also, Figure 8BIn the example, the UE assumes that SRS resources between different SRS resource sets corresponding to the same time domain action (for example, SRS resources #1 and #6 with the same resource type of "periodic") can be sent simultaneously. On the other hand, the UE assumes that SRS resources between different SRS resource sets not corresponding to the same time domain action (for example, SRS resource #1 with the resource type of "periodic" and SRS resource #11 with the resource type of "non-periodic") cannot be sent simultaneously.

[0166] [Implementation method 3.2]

[0167] Like Embodiments 1.2, 2.2, and the like, Embodiment 3.2 corresponds to a case where a panel for SRS transmission is set / indicated for each SRS resource.

[0168] In Embodiment 3.2, when the higher layer parameter "usage" is set to beam management, different SRS resources associated with different panels may be transmitted simultaneously (Implementation 3.2.1).

[0169] In Embodiment 3.2, when the high-level parameter "usage" is set to beam management, different SRS resources associated with different panels and corresponding to operations in the same time domain may be transmitted simultaneously (Implementation 3.2.2).

[0170] The "different SRS resources" in implementation mode 3.2 may also refer to a plurality of different SRS resources included in any SRS resource set used for beam management.

[0171] Fig.9A as well as Fig. 9B This is a diagram showing an example of the assumption of whether or not SRS can be transmitted simultaneously in Implementation 3.2.

[0172] Fig.9A This is equivalent to implementation method 3.2.1. Fig.9A , it is shown that SRS resource set #1 including SRS resources #1-#4 and SRS resource set #2 including SRS resources #6-#9 are set to the UE. Here, both SRS resource sets #1 and #2 have the purpose = beam management. It is assumed that SRS resources #i and #i+5 are associated with panel (P) #i ​​(i=1, 2, 3, 4). In this example, the resource types of SRS resource sets #1 and #2 can be the same or different.

[0173] Fig.9A In the example of , the UE assumes that multiple SRS resources (eg, SRS resources #1 to #4) associated with different panels can be sent simultaneously.

[0174] also, Fig.9A In the example of , the UE assumes that multiple SRS resources associated with the same panel (eg, SRS resources #1 and #6) cannot be sent simultaneously.

[0175] Fig. 9B This is equivalent to implementation method 3.2.2. Fig. 9B , it is shown that SRS resource set #1 including SRS resources #1-#4, SRS resource set #2 including SRS resources #6-#9, and SRS resource set #3 including SRS resources #11-#14 are set to the UE. Here, SRS resource sets #1, #2, and #3 are all used for beam management, but the resource types are periodic, periodic, and non-periodic, respectively. It is assumed that SRS resources #i, #i+5, and #i+10 are associated with panel (P) #i ​​(i=1, 2, 3, 4).

[0176] Fig. 9B In the example of , the UE assumes that multiple SRS resources (eg, SRS resources #1 to #4) associated with different panels can be sent simultaneously.

[0177] also, Fig. 9B In the example, the UE assumes that SRS resources between different panels corresponding to the same time domain action (for example, SRS resource #1 associated with panel #1 and SRS resource #7 associated with panel #2 with the same resource type of "periodic") can be sent simultaneously.

[0178] On the other hand, the UE assumes that SRS resources between different panels that do not correspond to actions in the same time domain (for example, SRS resource #6 with a resource type of "periodic" and associated with panel #1 and SRS resource #12 with a resource type of "non-periodic" and associated with panel #2) cannot be sent simultaneously.

[0179] According to the third embodiment described above, the UE and the base station can appropriately determine which panels can perform simultaneous transmission.

[0180] <Other>

[0181] As a UE capability, the UE may also report information related to the number of panels of the UE. The information related to the number of panels of the UE may also indicate at least one of the number of SRS resource sets, the number of SRS resources, the number of different spatial relationships that can be used simultaneously, and the like.

[0182] For example, with respect to implementation 1.1, preferably, when the base station sets the value of k for the UE, the base station knows the number of panels of the UE. Preferably, if it is assumed that the value of k is determined by the specification, the base station knows whether the UE can operate. If k=1 is determined by the specification, and the base station sets 2 SRS resource sets with purpose=beam management for the UE, the UE is assumed to have at least 2 panels.

[0183] The value of k in the above-mentioned embodiment may also be determined based on the number of configured / activated SRS resource sets (or SRS resources) for the purpose = beam management. For example, when the number of configured / activated SRS resource sets is 2, k may be determined to be 1, and when the number of configured / activated SRS resource sets is 4, k may be determined to be 2.

[0184] In addition, in each of the above embodiments, the panel may be limited to fewer than all panels that the UE has. For example, the panel may be a panel that is set to the UE (for example, notified of the panel ID), an activated panel, or a panel associated with an activated SRS resource set / SRS resource. In other words, the "panel" in each of the above embodiments may be interchangeable with an activated panel, an activated panel, etc.

[0185] (Wireless Communication System)

[0186] 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.

[0187] Fig.10 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0188] 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.

[0189] 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.

[0190] 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)).

[0191] The wireless communication system 1 may also include: a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0192] 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).

[0193] 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.

[0194] Furthermore, in each CC, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0195] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station may also be referred to as an IAB node.

[0196] 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.

[0197] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0198] 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.

[0199] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

[0200] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0201] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like can also be used in the wireless communication system 1.

[0202] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0203] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0204] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0205] 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.

[0206] 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 interchangeable.

[0207] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., may also be called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) may also be transmitted through PUCCH. Random access preamble code for establishing connection with a cell may also be transmitted through PRACH.

[0208] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0209] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, 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. can also be transmitted.

[0210] 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.

[0211] In addition, as an uplink reference signal (UL-RS), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted in the wireless communication system 1. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0212] (Base Station)

[0213] Fig.11 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.

[0214] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0215] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0216] 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.

[0217] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0218] 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.

[0219] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0220] 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.

[0221] 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.

[0222] 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, control information, etc. obtained from the control unit 110, to generate a bit string to be sent.

[0223] For the bit string to be sent, the transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, discrete Fourier transform (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 to output a baseband signal.

[0224] 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 .

[0225] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0226] 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.

[0227] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (ReceivedSignal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0228] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0229] 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 .

[0230] In addition, the transmitting and receiving unit 120 may also send a higher layer parameter to the user terminal 20 , wherein the higher layer parameter is used to determine a panel corresponding to a sounding reference signal (SRS) resource set or an SRS resource.

[0231] In addition, the transmitting and receiving unit 120 may also receive the following SRS: the SRS transmitted by the user terminal 20 in the SRS resource set or the SRS resource using the determined panel.

[0232] (User Terminal)

[0233] Fig.122 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided in one or more pieces.

[0234] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed 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.

[0235] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0236] 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.

[0237] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0238] 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.

[0239] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0240] 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.

[0241] 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.

[0242] The sending and receiving unit 220 (sending processing unit 2211), for example, 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.

[0243] 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.

[0244] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0245] 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 .

[0246] 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 .

[0247] 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 acquired baseband signal to obtain user data, etc.

[0248] 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.

[0249] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0250] In addition, the control unit 210 may also determine the panel corresponding to the measurement reference signal (Sounding Reference Signal (SRS)) resource set or SRS resource based on high-level parameters. The high-level parameters may also include SRS resource set ID, SRS resource ID, SRS spatial relationship information, panel ID, etc.

[0251] The transmitting and receiving unit 220 may also use the determined panel to perform SRS transmission in the SRS resource set or the SRS resource.

[0252] The control unit 210 may also determine the correspondence between the SRS resource set and the panel based on the order of the SRS resource set IDs used for beam management.

[0253] The control unit 210 may also assume that SRS resources in different SRS resource sets associated with different panels can be sent simultaneously.

[0254] The control unit 210 may also assume that different SRS resources associated with different panels can be sent simultaneously.

[0255] (Hardware Structure)

[0256] 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.

[0257] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0258] 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.13 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0259] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be used interchangeably. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of the devices shown in the figure, or can be configured to include a part of the devices shown in the figure.

[0260] 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.

[0261] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0262] 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.

[0263] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that enables a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0264] 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.

[0265] 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)), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0266] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. can also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) can also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0267] 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).

[0268] 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.

[0269] 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.

[0270] (Variation Example)

[0271] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc., depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0272] 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).

[0273] Here, the parameter set may also refer to a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0274] 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.

[0275] 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.

[0276] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0277] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0278] 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.

[0279] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may also be shorter than the TTI.

[0280] In addition, when a time slot or a mini time slot is called TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) 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.

[0281] 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.

[0282] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] In addition, a resource block may also be composed of one or more resource elements (RE). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

[0287] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0288] 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.

[0289] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific channel / signal other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0290] 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.

[0291] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0292] In the present disclosure, the names used for parameters, etc. are not limiting 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 limiting in all respects.

[0293] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] 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)).

[0298] 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).

[0299] 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).

[0300] 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.

[0301] 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.

[0302] 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.

[0303] 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.

[0304] 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.

[0305] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0306] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” are used interchangeably.

[0307] 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.

[0308] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0309] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0310] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0311] In the present disclosure, operations are assumed to be performed by a base station, and sometimes by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by a base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0312] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0313] 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) (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 expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0314] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0315] 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.

[0316] 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".

[0317] 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)".

[0318] In addition, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. are considered as "judgment (decision)". In other words, "judgment (decision)" can also refer to situations where some actions are considered as "judgment (decision)".

[0319] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0320] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be replaced by "access".

[0321] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0322] 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".

[0323] In the present disclosure, when the terms "include", "including", and variations thereof are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0324] 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.

[0325] 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 receives a high-layer signaling, wherein the high-layer signaling sets a first measurement reference signal resource set, namely, a first SRS resource set, and a second SRS resource set having an SRS resource set ID greater than that of the first SRS resource set; and The control unit determines that the first SRS resource set is associated with a smaller index of two control resource sets, namely, CORESET pool indexes, and the second SRS resource set is associated with a larger index of the two CORESET pool indexes.

2. A wireless communication method, which is a wireless communication method of a terminal, comprising: A step of receiving a high-layer signaling, wherein the high-layer signaling sets a first measurement reference signal resource set, namely a first SRS resource set, and a second SRS resource set having an SRS resource set ID greater than that of the first SRS resource set; as well as The step of determining that the first SRS resource set is associated with a smaller index of two control resource sets, namely, CORESET pool indexes, and the second SRS resource set is associated with a larger index of the two CORESET pool indexes.

3. A base station, comprising: A sending unit, sending a high-layer signaling, wherein the high-layer signaling sets a first measurement reference signal resource set, namely, a first SRS resource set, and a second SRS resource set having an SRS resource set ID greater than that of the first SRS resource set; The control unit determines that the first SRS resource set is associated with a smaller index of two control resource sets, namely, CORESET pool indexes, and the second SRS resource set is associated with a larger index of the two CORESET pool indexes.

4. A system having a terminal and a base station, The terminal has: A receiving unit receives a high-layer signaling, wherein the high-layer signaling sets a first measurement reference signal resource set, namely, a first SRS resource set, and a second SRS resource set having an SRS resource set ID greater than that of the first SRS resource set; and The control unit determines that the first SRS resource set is associated with a smaller index of two control resource sets, namely, CORESET pool indexes, and the second SRS resource set is associated with a larger index of the two CORESET pool indexes, The base station has: A sending unit sends the high-layer signaling.

Images