Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is characterized by being provided with: a reception unit that receives a high-level parameter indicating antenna switching as the use of a measurement reference signal (SRS) resource set; and a control unit that applies the six or more SRS ports and the six or more antenna ports on the basis of the terminal capability information relating to the antenna switching. According to one embodiment of the present disclosure, when an antenna switch is set as the use of an SRS, SRS transmission can be appropriately controlled.

Description

Technical Field

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

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

[0003] Successor systems of LTE (also known as, for example, 5th generation mobile communication system (5G), 5G+(plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In Rel.15NR, the use of the sounding reference signal (SRS) transmitted by the terminal (user terminal, user equipment (UE)) involves various aspects. In addition, the extension of SRS is being studied for future wireless communication systems (for example, Rel.17).

[0009] In Rel.15NR, antenna switching can be set as the purpose of SRS. However, the research on the settings related to SRS when antenna switching is set as the purpose of SRS is insufficient. In this case, it is difficult for UE to properly send SRS, and there is a concern that the communication throughput will be reduced.

[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 control SRS transmission when antenna switching is set as the purpose of SRS.

[0011] Means for solving problems

[0012] A terminal involved in one embodiment of the present invention is characterized in that it has: a receiving unit that receives high-level parameters indicating antenna switching as a purpose of a sounding reference signal (SRS) resource set; and a control unit that applies more than 6 SRS ports and more than 6 antenna ports based on terminal capability information related to the antenna switching.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, when antenna switching is set as the purpose of SRS, SRS transmission can be appropriately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing an example of correspondence between SRS resources and antenna ports in the case of 1T2R in Rel.16.

[0016] Figure 2 This is a diagram showing an example of correspondence between SRS resources and antenna ports in the case of 2T4R in Rel.16.

[0017] Figure 3 This is a diagram showing a first example of the correspondence between SRS resources and antenna ports in the case of 1T4R in Rel.16.

[0018] Figure 4This is a diagram showing a second example of the correspondence between SRS resources and antenna ports in the case of 1T4R in Rel.16.

[0019] Figure 5 This is a diagram showing a third example of the correspondence between SRS resources and antenna ports in the case of 1T4R in Rel.16.

[0020] Figure 6 This is a diagram showing a first example of the correspondence between SRS resources and antenna ports in the case of 1T6R in Rel.16.

[0021] Figure 7 This is a diagram showing a second example of the correspondence between SRS resources and antenna ports in the case of 1T6R in Rel.16.

[0022] Figure 8 This is a diagram showing a first example of the correspondence between SRS resources and antenna ports in the case of 1T8R in Rel.16.

[0023] Fig. 9 This is a diagram showing a first example of the correspondence between SRS resources and antenna ports in the case of 1T8R in Rel.16.

[0024] Fig.10 This is a diagram showing an example of correspondence between SRS resources and antenna ports in the case of 2T6R in Rel.16.

[0025] Fig.11 This is a diagram showing an example of correspondence between SRS resources and antenna ports in the case of 2T8R in Rel.16.

[0026] Fig.12 This is a diagram showing an example of correspondence between SRS resources and antenna ports in the case of 4T8R in Rel.16.

[0027] Fig.13 This is a diagram showing a guard period between two SRS resources when the purpose in Rel. 15 and 16 is antenna switching.

[0028] Figures 14A to 14C It is a diagram showing an example of SRS transmission in 1T2R.

[0029] Figures 15A to 15C It is a diagram showing an example of SRS transmission in 2T4R.

[0030] Fig.16 This is a diagram showing an example of Option 1 of Implementation 1-1.

[0031] Fig.17 This is a diagram showing an example of Option 2 of Implementation 1-1.

[0032] Fig.18 This is a diagram showing an example of Option 3 of Implementation 1-1.

[0033] Fig.19 This is a diagram showing an example of Option 5 of Implementation 1-1.

[0034] Fig. 20 This is a diagram showing an example of Option 6 of Implementation 1-1.

[0035] Fig.21 This is a diagram showing examples of Option 1 and Option A in Implementation 1-2.

[0036] Fig. 22 This is a diagram showing a first example of Option 2 and Option B of Implementation 1-2.

[0037] Fig.23 This is a diagram showing a second example of Option 2 and Option B of Implementation 1-2.

[0038] Fig.24 This is a diagram showing examples of Option 6 and Option A in Implementation 1-2.

[0039] Fig.25 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0040] Fig.26 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0041] Fig. 27 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0042] Fig.28 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment.

[0043] Fig.29 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0044] (SRS)

[0045] In Rel.15NR, the measurement reference signal (Sounding Reference Signal (SRS)) has various uses. NR's SRS is not only used for uplink (UL) CSI measurement, which is also used in existing LTE (LTE Rel.8-14), but also for downlink (DL) CSI measurement, beam management, etc. SRS can also be used in positioning.

[0046] A terminal (user terminal, User Equipment (UE)) may also be configured with one or more SRS resources. The SRS resource may also be identified by an SRS Resource Index (SRI).

[0047] Each SRS resource may also have one or more SRS ports (or may correspond to one or more SRS ports). For example, the number of ports of each SRS may also be 1, 2, 4, etc.

[0048] The UE may also be configured with one or more SRS resource sets. One SRS resource set may also be associated with a specific number of SRS resources. The UE may also use high-level parameters in common with respect to the SRS resources included in one SRS resource set. In addition, the resource set in the present disclosure may also be rewritten as a set, a resource group, a group, etc.

[0049] The information related to the SRS resource or resource set may also be set to the UE using higher layer signaling, physical layer signaling (eg, downlink control information (DCI)) or a combination thereof.

[0050] 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.

[0051] The SRS resource set configuration 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, SRS resource type, information on the usage of SRS, etc. In addition, the SRS resource ID may also be referred to as the SRS Resource ID (SRI).

[0052] Here, the SRS resource type may also represent any one of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic SRS (A-SRS). In addition, the UE may also send P-SRS and SP-SRS periodically (or periodically after activation). The UE may also send A-SRS based on the SRS request of the DCI.

[0053] In addition, the purpose of SRS (RRC parameter "usage") 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 in the decision of a precoder transmitted by a codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on SRI.

[0054] Regarding the SRS for beam management, it can also be assumed that only one SRS resource can be transmitted at a certain time point for each SRS resource set. In addition, when a plurality of SRS resources belong to different SRS resource sets, these SRS resources may be transmitted simultaneously.

[0055] SRS resource setting information (for example, the "SRS-Resource" of the RRC parameter) may also include information related to the SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping, SRS resource type, sequence ID, spatial relationship, etc.

[0056] The UE may also transmit SRS in adjacent symbols corresponding to the number of SRS symbols in the last 6 symbols in one time slot. In addition, the number of SRS symbols may be 1, 2, 4, etc. The UE may also start transmitting SRS from the symbol before the offset from the last symbol in one time slot. The offset may also be a number of symbols greater than 0 and less than 5 provided by the RRC parameter "startPosition".

[0057] In addition, the number of repetitions (RRC parameter "repetitionFactor") may be a value less than the number of SRS symbols. When the number of repetitions is 2 or more, SRSs corresponding to the number of SRS symbols may be repeatedly transmitted over a plurality of time slots.

[0058] The UE may switch the BWP (Bandwidth Part) 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.

[0059] (SRS antenna switching)

[0060] In Rel.15NR, as described above, antenna switching (also referred to as antenna port switching) can be set as the purpose of SRS. SRS antenna switching can also be used, for example, when using uplink SRS in the time division duplex (TDD) band to perform downlink CSI acquisition.

[0061] For example, for a UE having a capability in which the number of antenna ports that can be used for transmission is less than the number of antenna ports that can be used for reception, UL SRS measurement may be used for determining a DL precoder.

[0062] In addition, the UE may also report to the network UE capability information indicating the supported SRS transmission port switching mode (e.g., RRC parameter "supportedSRS-TxPortSwitch"). This mode is expressed in the form of "txry" such as "t1r2", "t2r4", etc., which may also mean that x antenna ports out of a total of y antennas can be used for SRS transmission (which may also be expressed as xTyR). Here, y may also correspond to all or a subset of the UE's receiving antennas.

[0063] For example, a 2T4R (2 transmission ports, 4 reception ports) UE may be configured with an SRS resource set including two SRS resources each having two ports and used for antenna switching in order to obtain DL CSI.

[0064] In addition, when x and y of "txty" are the same value, it can also be expressed as xT=xR (for example, 4T=4R).

[0065] The UE may also assume that the starting symbols of the SRS resources in the SRS resource set used for antenna switching are different from each other. In addition, the UE may also assume that there is a guard period between the SRS resources in the same SRS resource set.

[0066] The guard period may also be called a non-transmission period, an SRS switching period, a port switching period, etc. The UE may assume that it does not transmit any signal (for example, any other signal) during the guard period in the time slot in which the PUSCH is transmitted.

[0067] The UE may use the guard period to enable (ON) (may also be referred to as activating, starting, etc.) the antenna port to be used in the next SRS transmission.

[0068] The length of the guard period between SRS resources may be greater than the minimum guard period Y between SRS resources indicated in 3GPP TS 38.214 Table 6.2.1.2-1 (Y = 1 or 2 symbols). For example, Y = 1 (when Subcarrier Spacing (SCS) = 15, 30, 60 kHz), Y = 2 (when SCS = 120 kHz), etc.

[0069] Rel.15 / 16 NR UE expects that the same number of SRS ports be set for all SRS resources in an SRS resource set used for antenna switching.

[0070] A Rel.15 / 16 NR UE that reports 1T1R, 2T4R, 1T4R capabilities does not expect more than one SRS resource set to be configured or triggered in the same timeslot.

[0071] A Rel.15 / 16 NR UE reporting the capabilities of 1T=1R, 2T=2R, 4T=4R does not expect more than one SRS resource set to be configured or triggered in the same symbol.

[0072] <Specific example of setting of applied antenna switching in Rel. 15 and 16>

[0073] For example, when the number of transmission ports of the UE is less than the number of reception ports, the UE measurement for obtaining DL CSI is used, and the purpose of SRS is set to "antenna switching". In Rel.15 and 16, 1T1R, 2T2R, 4T4R, 1T2R, 2T4R, and 1T4R are supported. The following describes 1T2R, 2T4R, and 1T4R of Rel.16.

[0074] In the case of 1T2R, a maximum of two SRS resource sets (P / SP / AP) with different operations in the time domain are set. Each resource set contains two SRS resources of different symbols. Figure 1 In the example of , one SRS resource set has two SRS resources, each SRS resource has a single SRS port. The SRS port of a first resource in the SRS resource set is associated with a UE antenna port that is different from the SRS port of a second resource in the same set.

[0075] In the case of 2T4R, a maximum of two SRS resource sets (P / SP / AP) with different operations in the time domain are set. Each resource set contains two SRS resources with different symbols. Figure 2 In the example, one SRS resource set has two SRS resources, each of which has two SRS ports (also referred to as port pairs). The SRS port pair of the first SRS resource is associated with a UE antenna port pair that is different from the SRS port pair of the second SRS resource. Figure 2 , UE antenna ports #0 and #1 are a pair, and UE antenna ports #2 and #3 are a pair.

[0076] In the case of 1T4R, 0 or 1 SRS resource set (P / SP) is set. Each resource set contains 4 SRS resources of different symbols. Figure 3 In the example of , one P / SP SRS resource set has four SRS resources, each SRS resource has a single SRS port. The SRS ports of each SRS resource are associated with different UE antenna ports.

[0077] In the case of 1T4R, 0 or 2 SRS resource sets (APs) are set. Each resource set contains a total of 4 SRS resources in different symbols within 2 time slots. Figure 4 , Figure 5 In the example of , two AP SRS resource sets have a total of four SRS resources. Each SRS resource has one SRS port. The SRS ports of each SRS resource of the two resource sets are associated with different UE antenna ports.

[0078] exist Figure 4 In the example, two resource sets each have two SRS resources. Figure 5 In the example, one of the two resource sets has one SRS resource, and the other resource set has three SRS resources.

[0079] In the case of 1T1R, 2T2R, and 4T4R, a maximum of two SRS resource sets are set. Each resource set has one SRS resource. The number of SRS ports of each SRS resource is any one of 1, 2, and 4.

[0080] <Specific example of applying the new setting of antenna switching>

[0081] In Rel.17, support for 1T6R, 1T8R, 2T6R, 2T8R, and 4T8R is also being studied.

[0082] In the case of 1T6R, one P / SP SRS resource set may also have six SRS resources, and each SRS resource may also have a single SRS port ( Figure 6 ). The SRS ports of each SRS resource in the SRS resource set are respectively associated with different UE antenna ports.

[0083] In the case of 1T6R, two AP SRS resource sets may also have a total of six SRS resources, and each SRS resource may also have a single SRS port ( Figure 7 ), the SRS ports of each SRS resource in the two resource sets are associated with different UE antenna ports. In addition, the number of AP SRS resource sets can also be 3.

[0084] In the case of 1T8R, one P / SP SRS resource set may also have eight SRS resources, and each SRS resource may also have a single SRS port ( Figure 8 ). SRS ports of different SRS resources in the SRS resource set are associated with different UE antenna ports.

[0085] In the case of 1T8R, two AP SRS resource sets may also have a total of eight SRS resources, and each SRS resource may also have a single SRS port ( Fig. 9 ). The SRS ports of each SRS resource in the two SRS resource sets are associated with different UE antenna ports. The number of AP SRS resource sets may also be 3 or 4.

[0086] In the case of 2T6R, one P / SP SRS resource set may also have three SRS resources, and each SRS resource may also have two SRS ports ( Fig.10). The SRS port pairs of each SRS resource in the SRS resource set are associated with different UE antenna port pairs. Fig.10 , UE antenna ports #0 and #1 are a pair, UE antenna ports #2 and #3 are a pair, and UE antenna ports #4 and #5 are a pair. The number of AP SRS resource sets may also be 2 or 3, and each SRS resource set may also have 1 or 2 SRS resources.

[0087] In the case of 2T8R, one P / SP / AP SRS resource set may also have four SRS resources, and each SRS resource may also have two SRS ports ( Fig.11 ). The SRS port pairs of each SRS resource in the SRS resource set are associated with different UE antenna port pairs. Fig.11 , UE antenna ports #0 and #1 are a pair, UE antenna ports #2 and #3 are a pair, UE antenna ports #4 and #5 are a pair, and UE antenna ports #6 and #7 are a pair. The number of AP SRS resource sets may also be 2, 3, or 4, and each SRS resource set may also have 1, 2, or 3 SRS resources.

[0088] In the case of 4T8R, one P / SP / AP SRS resource set has two SRS resources, and each SRS resource may also have four SRS ports ( Fig.12 ). The SRS ports of each SRS resource in the SRS resource set are associated with different UE antenna ports respectively. The number of AP SRS resource sets may also be 2, and each SRS resource set may also have 1 SRS resource.

[0089] <Protection Period>

[0090] A guard period of Y symbols is set between SRS resources in an SRS resource set. The UE does not transmit other signals during the period when transmitting the SRS in the SRS resource set in the same time slot.

[0091] When 1T2R, 1T4R, 2T4R or 1T6R, 1T8R, 2T6R, 2T8R, 4T8R are applied, the UE does not expect multiple SRS resource sets whose purpose of the high-level parameter is set to "antennaSwitching" to be set or triggered in the same time slot. When 1T=1R, 2T=2R, 4T=4R are applied, the UE does not expect multiple SRS resource sets whose purpose of the high-level parameter is set to "antennaSwitching" to be set or triggered in the same codeword.

[0092] Fig.13 This is a diagram showing a guard period between two SRS resources when the purpose in Rel. 15 and 16 is antenna switching. Fig.13 The relationship between the subcarrier spacing and the guard period (number of symbols) is shown.

[0093] Fig.14A 1T2R is a diagram showing the relationship between the SRS port and the UE antenna port. Fig.14A In the example, SRS port 0 of the first SRS resource is associated with UE antenna port 0, and SRS port 0 of the second SRS resource is associated with UE antenna port 1.

[0094] Fig. 14B FIG. 1 is a diagram showing a resource grid for each SRS port in 1T2R. Fig. 14B As shown, in resource 0 of symbol 10 and resource 1 of symbol 12, SRS port 0 is used for SRS transmission. In this case, SRS port 1 is not used. Between symbol 10 and symbol 12 is a guard period.

[0095] Fig. 14C 1T2R is a diagram showing the transmission status of the UE antenna port in 1T2R. Fig. 14C As shown, the UE uses UE antenna port 0 (Antenna 0) to send SRS in symbol 10, and uses UE antenna port 1 (Antenna 1) to send SRS in symbol 12. That is, the UE switches the antenna port for sending SRS from UE antenna port 0 to UE antenna port 1 after the protection period.

[0096] Fig.15A 2T4R is a diagram showing the relationship between the SRS port and the UE antenna port. Fig.15A In the example, SRS port 0 of the first SRS resource is associated with UE antenna port 0, and SRS port 1 of the first SRS resource is associated with UE antenna port 1. In addition, SRS port 0 of the second SRS resource is associated with UE antenna port 2, and SRS port 1 of the second SRS resource is associated with UE antenna port 3.

[0097] Fig. 15B FIG. 4 is a diagram showing a resource grid of each SRS port in 2T4R. Fig. 15B As shown, in resource 0 of symbol 10 and resource 1 of symbol 12, SRS port 0 is used for SRS transmission. The same is true for SRS port 1. Between symbol 10 and symbol 12 is a guard period.

[0098] Fig. 15C 2T4R is a diagram showing the transmission status of the UE antenna port in 2T4R. Fig. 15CAs shown, the UE uses UE antenna port 0 (Antenna 0) and UE antenna port 1 (Antenna 1) to send SRS in symbol 10, and uses UE antenna port 2 (Antenna 2) and UE antenna port 3 (Antenna 3) to send SRS in symbol 12. That is, the UE switches the antenna port for sending SRS from UE antenna ports 0 and 1 to UE antenna ports 2 and 3 after the protection period.

[0099] (analyze)

[0100] In Rel.15NR, antenna switching can be set as the purpose of SRS as described above. However, there is insufficient research on the settings related to SRS when antenna switching is set as the purpose of SRS. In this case, it is difficult for UE to properly control SRS transmission, and there is a concern that communication throughput will be reduced.

[0101] For example, in future wireless communication systems (Rel.18), there is a possibility that at least one of the 6 transmission ports (6T) / 8 transmission ports (8T) of SRS will be applied. However, when 6T / 8T is applied, whether and how to support SRS settings for antenna switching is not yet clear. For example, consider that when 6T is applied, the UE supports a maximum of 6 layers for UL, and when 8T is applied, the UE supports a maximum of 8 layers for UL.

[0102] Therefore, the inventors of the present invention have conceived of a terminal that can accept appropriate settings when antenna switching is set as the purpose of SRS.

[0103] 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.

[0104] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C".

[0105] In the present disclosure, activate, deactivate, indicate (or specify), select, configure, update, determine, etc. may also be mutually rewritten. In the present disclosure, support, control, controllable, operate, and operate may also be mutually rewritten.

[0106] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, high-layer parameters, information elements (IE), settings, etc. can also be overwritten with each other. In the present disclosure, Medium Access Control (MAC) control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc. can also be overwritten with each other.

[0107] In the present disclosure, the high-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0108] In the present disclosure, MAC signaling may also use, for example, MAC Control Element (MACCE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0109] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0110] In the present disclosure, index, identifier (ID), indicator, resource ID, etc. may also be mutually overwritten. In the present disclosure, sequence, list, set (set), group, cluster, subset, etc. may also be mutually overwritten.

[0111] In the present disclosure, panel, UE panel, panel group, beam, beam group, precoder, uplink (UL) transmission entity, transmission / reception point (TRP)), base station, spatial relationship information (Spatial Relation Information (SRI)), spatial relationship, SRS resource indicator (SRS Resource Indicator (SRI)), control resource set (COntrol REsource SET (CORESET)), physical downlink shared channel (Physical Downlink Shared Channel (PDSCH)), codeword (Codeword (CW)), transport block (Transport Block (TB)), reference signal (Reference Signal (RS)), antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, code division multiplexing (Code Division Multiplexing (CDM)) group, reference signal group, CORESET group, physical uplink control channel (Physical Uplink Control Channel (PUCCH)) group, PUCCH resource group), resources (for example, reference signal resources, SRS resources), resource sets (for example, reference signal resource sets), CORESET pool, downlink transmission configuration indication state (Transmission Configuration Indication state) (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), Quasi-Co-Location (Quasi-Co-Location (QCL)), QCL assumptions, etc. can also be rewritten with each other.

[0112] In addition, the spatial relationship information identifier (Identifier (ID)) (TCI state ID) and the spatial relationship information (TCI state) can also be overwritten with each other. "Spatial relationship information" can also be overwritten with "a collection of spatial relationship information", "one or more spatial relationship information", etc. The TCI state and TCI can also be overwritten with each other.

[0113] In the present disclosure, "Rel.XX" indicates a 3GPP version. However, the version number "XX" is an example and may be replaced by another number.

[0114] In the present disclosure, P SRS and P-SRS may also be overwritten with each other. In the present disclosure, SP SRS and SP-SRS may also be overwritten with each other. In the present disclosure, AP SRS and AP-SRS may also be overwritten with each other. Resource set group and SRS resource set group may also be overwritten with each other.

[0115] In the present disclosure, xTyR is applied, "txry" is sent (reported) in UE capability information (e.g., supportedSRS-TxPortSwitch), and xTyR is set in high-layer signaling / physical layer signaling, and can also be rewritten. In the present disclosure, UL transmission of a number of layers greater than 4 can also be applied. The processing of the present disclosure can also be applied to UEs that support a number of layers greater than 4.

[0116] In the present disclosure, SRS port, transmission port, and SRS transmission port may also be replaced with each other. In the present disclosure, reception port, antenna port, and UE antenna port may also be replaced with each other.

[0117] (Wireless Communication Method)

[0118] When a high-level parameter indicating antenna switching as the usage of an SRS resource set is received and the usage is set, the UE may also support / apply more than 6 SRS transmit ports and more than 6 antenna ports (e.g., at least one of 6T6R, 6T8R, 8T8R) based on the terminal (UE) capability information related to antenna switching (e.g., "supportedSRS-TxPortSwitch"). In addition, each process in the present disclosure may also be based on the premise that antenna switching is set as the usage of an SRS resource set (high-level parameters indicating antenna switching as the usage of an SRS resource set are received).

[0119] The UE may also send (report) at least one of 't6r8' corresponding to 6T8R, 't8r8' corresponding to 8T8R, 't6r6-t6r8' corresponding to 6T=6R / 6T8R, 't6r8-t8r8' corresponding to 6T8R / 8T8R, and 't6r6-t8r8' corresponding to 6T=6R / 8T=8R as UE capability information related to antenna switching (e.g., supportedSRS-TxPortSwitch). At least one of 6T8R, 6T6R, and 6T8R may not be supported.

[0120] The UE capabilities related to the combination of the above-mentioned new antenna switching (6T6R, 6T8R, 8T8R) and the existing xTyR can also be supported. The UE capabilities can also be supported as a combination of at least two of {t1r1, t1r2, t1r4, t1r6, t1r8, t2r2, t2r4, t2r6, t2r8, t4r4, t4r8, t6r6, t6r8, t8r8} including the new antenna switching and the existing xTyR.

[0121] <Implementation method 1-1>

[0122] In implementation mode 1-1, an SRS resource set to which more than 6 SRS ports and more than 8 antenna ports (e.g., 6T8R) are applied and to which "periodic" or "semi-persistent" is set as the resource type of the corresponding RRC parameter "SRS-ResourceSet" is described. The UE uses more than 6 SRS ports and more than 8 antenna ports (e.g., 6T8R) to control the transmission of SRS in the SRS resource set.

[0123] [Method 1-1-1]

[0124] When 6T8R is applied, the UE may also be set to "periodic" as the resource type in the SRS resource set through high-layer signaling, and may be set to 0 or 1 SRS resource set. In this case, any of the following options may also be applied.

[0125] [[Option 1]] One resource set has two SRS resources sent in different symbols. Each SRS resource has four SRS ports ( Fig.16 ).

[0126] [[Option 2]] One resource set has four SRS resources sent in different symbols. Each SRS resource has two SRS ports ( Fig.17 ).

[0127] [[Option 3]] One resource set has three SRS resources sent in different symbols. One SRS resource has four SRS ports, and the other two SRS resources each have two SRS ports ( Fig.18 ).

[0128] [[Option 4]] One resource set has three SRS resources transmitted in different symbols. Each SRS resource has four SRS ports.

[0129] [[Option 5]] One resource set has four SRS resources sent in different symbols, each SRS resource has four SRS ports ( Fig.19 ).like Fig.19 As shown in the example, one UE antenna port may also be associated with multiple SRS ports and measured twice.

[0130] [[Option 6]] One resource set has two SRS resources sent in different symbols. One SRS resource has six SRS ports and the other one has two SRS ports ( Fig. 20 ). This option can also be applied when 6 SRS ports are supported / configured for antenna switching.

[0131] [[Option 7]] One resource set has two SRS resources transmitted in different symbols. Each SRS resource has six SRS ports. This option can also be applied when six SRS ports are supported / configured for antenna switching.

[0132] [[Option 8]] One resource set has two SRS resources transmitted in different symbols. One SRS resource has six SRS ports, and another SRS resource has four SRS ports. This option can also be applied when six SRS ports are supported / configured for antenna switching.

[0133] In the case where 6 SRS ports are not supported / configured for antenna switching, the UE may also apply any one of options 1-5.

[0134] For option 6 / 7 / 8, the UE may also signal / report new UE capabilities related to support of 6-port SRS for antenna switching / non-codebook.

[0135] In 6T8R, when the UE does not indicate specific UE capabilities corresponding to Rel.17 / 18 (r17 / r18), 0 or 1 SRS resource sets may be set as "semi-persistent". Alternatively, when the UE indicates specific UE capabilities corresponding to Rel.17 / 18, a maximum of 2 SRS resource sets may be set as semi-persistent, and a maximum of 1 SRS resource set may be set as "periodic". Here, the two SRS resource sets set as semi-persistent will not be activated at the same time. Any one of the above options 1 to 8 may also be applied as the number of SRS resources per resource set and the number of ports for each SRS resource.

[0136] [Method 1-1-2]

[0137] In 6T8R, when the UE does not indicate specific UE capabilities corresponding to Rel.17 / 18 (r17 / r18), different values ​​(periodic or semi-persistent) may be set as the value of the resource type of "SRS-ResourceSet" for 0, 1 or 2 SRS resource sets. Alternatively, when the UE indicates specific capabilities corresponding to Rel.17 / 18 (r17 / r18), a maximum of 2 SRS resource sets may be set as "semi-persistent" and a maximum of 1 SRS resource set may be set as "periodic". Here, the two SRS resource sets set as semi-persistent may not be activated simultaneously. Any one of the above options 1 to 8 may also be applied as the number of SRS resources for each resource set and the number of ports for each SRS resource.

[0138] The UE capabilities corresponding to Rel.17 / 18 (r17 / r18) may also be the UE capabilities corresponding to Rel.17 (UE capabilities for antenna switching, indicating support for a maximum of 2 "semi-persistent" SRS resource sets and a maximum of 1 "periodic" SRS resource set), or the UE capabilities corresponding to the new Rel.18 (for example, the maximum number of SRS resource sets for separate or joint SP / P / AP).

[0139] The UE capability corresponding to Rel.17 may also be applied to all xTyRs where y is greater than 8. When y of xTyR is greater than 4 and the UE capability corresponding to Rel.17 is not supported, the UE may also support a maximum of 1 SRS resource set for P-SRS and a maximum of 1 SRS resource set for SP-SRS. When y of xTyR is less than 4 and the UE capability corresponding to Rel.17 is not supported, the UE may also follow the number (maximum number) of P-SRS and SP-SRS in Rel.15. It may also be stipulated that 2 SP-SRS resource sets will not be activated simultaneously.

[0140] The SRS ports (pairs) of each resource in one SRS resource set may also be associated with different UE antenna ports (pairs). The SRS ports (pairs) of SRS resources in different SRS resource sets are associated with different UE antenna ports (pairs) in some options (options 1 / 2 / 3 / 6), but are associated with the same UE antenna port (pair) in other options (options 4 / 5 / 7 / 8).

[0141] <Implementation method 1-2>

[0142] In implementation mode 1-2, an SRS resource set to which more than 6 SRS ports and more than 8 antenna ports (e.g., 6T8R) are applied and to which "aperiodic" is set as the resource type of the corresponding RRC parameter "SRS-ResourceSet" is described. The UE uses more than 6 SRS ports and more than 8 antenna ports (e.g., 6T8R) to control the transmission of SRS within the SRS resource set. In this case, any of the following options may also be applied.

[0143] [[Option 1]] One or more resource sets have a total of 2 SRS resources. Each SRS resource has 4 SRS ports ( Fig.21 ).

[0144] [[Option 2]] One or more resource sets have a total of 4 SRS resources. Each SRS resource has 2 SRS ports ( Fig. 22 , Fig.23 ). For example, each SRS resource set may also have 2 SRS resources ( Fig. 22 ). Alternatively, the first SRS resource set may have 1 SRS resource, and the second SRS resource set may have 3 SRS resources ( Fig.23 ).

[0145] [[Option 3]] One or more resource sets have a total of 3 SRS resources. One SRS resource has 4 SRS ports. The other two SRS resources each have 2 SRS ports.

[0146] [[Option 4]] One or more resource sets have a total of three SRS resources. Each SRS resource has four SRS ports.

[0147] [[Option 5]] One or more resource sets have a total of 4 SRS resources. Each SRS resource has 4 SRS ports.

[0148] [[Option 6]] One or more resource sets have 2 SRS resources. One SRS resource has 6 SRS ports and another SRS resource has 2 SRS ports ( Fig.24 ). This option can also be applied when 6 SRS ports are supported / set in antenna switching.

[0149] [[Option 7]] One or more resource sets have two SRS resources. Each SRS resource has six SRS ports. This option can also be applied when six SRS ports are supported / set in antenna switching.

[0150] [[Option 8]] One or more resource sets have two SRS resources. One SRS resource has six SRS ports, and one SRS resource has four SRS ports. This option can also be applied when six SRS ports are supported / set in antenna switching.

[0151] In the case where 6 SRS ports are not supported / configured for antenna switching, the UE may also apply any one of options 1-5.

[0152] For option 6 / 7 / 8, the UE may also signal / report new UE capabilities related to support of 6-port SRS for antenna switching / non-codebook.

[0153] For the number of SRS resource sets, any of the following options A to D may also be applied: The number of SRS resource sets and the number of SRS resources included in each SRS resource set may be set through higher layer signaling / physical layer signaling, or may be defined in the specification.

[0154] [[Option A]] (corresponding to options 1 / 6 / 7 / 8) applies any number of SRS resource sets from 0 to 2. Fig.21 , Fig.24 , an example of 2 SRS resource sets is shown.

[0155] [[Option B]] (corresponding to Option 2 / 5) applies any number of SRS resource sets from 0 to 4. When two SRS resource sets are applied, each SRS resource set may also have two SRS resources ( Fig. 22 ). When two SRS resource sets are applied, one SRS resource set may have one SRS resource and the other SRS resource set may have three SRS resources ( Fig.23 ).

[0156] When three SRS resource sets are applied, one (first) SRS resource set may have one SRS resource, another (second) SRS resource set may have one SRS resource, and another (third) SRS resource set may have two SRS resources.

[0157] [[Option C]] (corresponding to Option 3) Apply any number of SRS resource sets from 0 to 3. When two SRS resource sets are applied, one SRS resource set may have one SRS resource with four SRS ports, and another SRS resource set may have two SRS resources with two SRS ports respectively. When two SRS resource sets are applied, one SRS resource set may have one SRS resource with two SRS ports and one SRS resource with four SRS ports, and another SRS resource set may have the remaining SRS resource with two SRS ports.

[0158] [[Option D]] (corresponding to Option 4) applies any number of SRS resource sets from 0 to 3. When two SRS resource sets are applied, one SRS resource set may have two SRS resources and the other SRS resource set may have one SRS resource.

[0159] In options A to D, when there are X SRS resource sets and X is equal to the number of SRS resources, the SRS resource sets may each have 1 SRS resource. In each option, it is also possible to set which SRS resource is included in which SRS resource set by high-layer signaling / physical layer signaling. When Y resource sets are applied, the UE may also send X SRS resources in different symbols in Y different time slots. The UE may also be able to send (report) new UE capabilities (e.g., Cap-AP-r18) related to the maximum number of "aperiodic" SRS resource sets for a certain xTyR.

[0160] According to the present embodiment, the structures of the SRS resource set, SRS resources, and SRS ports when 6T8R is applied become clear, and the UE can perform appropriate SRS transmission by accepting these settings.

[0161] <Implementation method 2>

[0162] In implementation mode 2, an example is described in which 6T6R or 8T8R is applied and the UE does not support (does not indicate) a specific UE (terminal) capability (e.g., capability information (r17 / r18) corresponding to Rel.17 / 18). In the case where the above-mentioned specific terminal capability is not supported, the UE may also control the transmission of SRS using six or more SRS ports (e.g., 6T6R or 8T8R) that are the same number as the number of antenna ports. In this case, any of the following options may also be applied.

[0163] [[Option 1]] An arbitrary number of SRS resource sets, from 0 to 2, each having 1 SRS resource, is applied. The number of SRS ports of each SRS resource is 1, 2, or 4.

[0164] [[Option 2]] An arbitrary number of SRS resource sets from 0 to 3, each of which has 1 SRS resource, is applied. The number of SRS ports of each SRS resource is 1, 2, or 4.

[0165] [[Option 3]] An arbitrary number of 0 to 4 SRS resource sets, each of which has 1 SRS resource, is applied. The number of SRS ports of each SRS resource is 1, 2, or 4.

[0166] [[Option 4]] An arbitrary number of SRS resource sets from 0 to 2, each of which has 2 SRS resources, is applied. The number of SRS ports of each SRS resource is 1, 2, or 4.

[0167] [[Option 5]] applies 0 or 1 SRS resource sets with 2 SRS resources respectively. The number of SRS ports of each SRS resource is 1, 2 or 4.

[0168] [[Option 6]] An SRS resource set having any number of 0 to 2 of 4 SRS resources is applied. The number of SRS ports of each SRS resource is 1, 2, or 4.

[0169] [[Option 7]] applies 0 or 1 SRS resource set with 4 SRS resources respectively. The number of SRS ports of each SRS resource is 1, 2 or 4.

[0170] [[Option 8]] When 6-port SRS is supported / configured for antenna switching, or when new UE capability signaling / reporting related to support of 6 SRS ports for antenna switching / non-codebook is performed, 1 SRS resource may also have 6 SRS ports. Option 8 may also be combined with any of Options 1 to 7.

[0171] [[Option 9]] When 8 SRS ports are supported / configured for antenna switching, or when new UE capability signaling / reporting related to support of 8 SRS ports for antenna switching / non-codebook is performed, 1 SRS resource may also have 8 SRS ports. Option 9 may also be combined with any one of Options 1 to 7.

[0172] More than 2 SRS resource sets may also be applied only to "aperiodic". The UE may also send (report) new UE capabilities (e.g. Cap-AP-r18) related to the maximum number of SRS resource sets for "aperiodic" or antenna switching with specific port SRS (e.g., for 6-port or 8-port SRS).

[0173] In the case where the UE indicates a new specific UE capability (cap_r17 / r18), the RRC parameter SRS-ResourceSet resourceType may be set to a maximum of 2 SRS resource sets of "semi-persistent" and the SRS-ResourceSet resourceType may be set to a maximum of 1 SRS resource set of "periodic". Here, the two SRS resource sets set to "semi-persistent" may not be activated at the same time.

[0174] According to the present embodiment, the structures of the SRS resource set, SRS resources, and SRS ports when 6T6R and 8T8R are applied are clarified, and the UE can perform appropriate SRS transmission by accepting these settings.

[0175] <Implementation method 3>

[0176] When 6T8R is applied, the UE does not expect (does not assume) that the usage of higher-level parameters is set / triggered for more than one SRS resource set for antenna switching in the same time slot (the UE does not expect / trigger the usage of higher-level parameters is set for more than one SRS resource set for antenna switching in the same time slot).

[0177] When 6T=6R or 8T=8R is applied, the UE does not expect (does not assume) that the usage of the higher-level parameters is set / triggered within the same codeword to be set to more than one SRS resource set for antenna switching (the UE does not expect / trigger the usage of the higher-level parameters to be set to more than one SRS resource set for antenna switching within the same codeword).

[0178] <Other>

[0179] As described above, when 6T / 8T is applied to the SRS port, 6 ports / 8 ports may be applied to the PUSCH of the CB (codebook).

[0180] When 6 / 8 SRS ports for antenna switching are not supported, the UE may be set with 1 / 2 / 4 SRS ports for antenna switching and perform DL CSI measurement / reporting for 6T / 8T UE (for example, options 1 to 5 of implementation mode 1-1 and implementation mode 1-2, and options 1 to 7 of implementation mode 2).

[0181] <UE capability>

[0182] The UE may also send (report) to the network (base station) UE capability information indicating whether it supports at least one of the examples in the present disclosure. In addition, the UE may also receive an indication / setting related to at least one of the examples in the present disclosure (e.g., an indication / setting regarding validity / invalidity) through high-layer signaling / physical layer signaling. The indication / setting may also correspond to the UE capability information sent by the UE. At least one of the examples in the present disclosure may also be applied only to a UE that receives the indication / setting, a UE that sends the corresponding UE capability information, or a UE that supports the corresponding UE capability.

[0183] (Wireless Communication System)

[0184] 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.

[0185] Fig.25 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.

[0186] 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.

[0187] 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.

[0188] 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)).

[0189] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0190] 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).

[0191] 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 these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0192] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0193] Multiple base stations 10 may also be connected via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0194] 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.

[0195] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0196] 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.

[0197] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0198] In the wireless communication system 1, as downlink channels, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)) and the like may be used.

[0199] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like may be used as uplink channels.

[0200] The PDSCH transmits user data, high-layer control information, system information block (SIB), etc. The PUSCH transmits user data, high-layer control information, etc. In addition, the PBCH transmits the master information block (MIB).

[0201] The PDCCH may also transmit lower layer control information. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0202] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0203] 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.

[0204] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be rewritten mutually.

[0205] Through PUCCH, uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.) and scheduling request (SR) can also be transmitted. Through PRACH, random access preambles for establishing a connection with a cell can also be transmitted.

[0206] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

[0207] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted as DL-RS.

[0208] 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.

[0209] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0210] (Base Station)

[0211] Fig.261 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.

[0212] 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 base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0213] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0214] 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.

[0215] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0216] 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.

[0217] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0218] 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.

[0219] 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.

[0220] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0221] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0222] 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 .

[0223] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0224] 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.

[0225] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0226] The transmission path interface 140 can also send and receive signals (return signaling) between 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.

[0227] 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 .

[0228] In addition, the transmitting and receiving unit 120 may also send a high-level parameter indicating antenna switching as a purpose of a sounding reference signal (SRS) resource set. The transmitting and receiving unit 120 may also receive an SRS transmitted by applying more than 6 SRS ports and more than 6 antenna ports in the terminal according to the terminal capability information related to the antenna switching and using the more than 6 SRS ports and the more than 6 antenna ports. The control unit 110 may also control the transmission and reception of the transmitting and receiving unit 120.

[0229] (User Terminal)

[0230] Fig. 27 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0231] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0232] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0233] 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.

[0234] 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 common knowledge in the technical field involved in the present disclosure.

[0235] 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.

[0236] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0237] 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.

[0238] 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.

[0239] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0240] 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.

[0241] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0242] 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 .

[0243] 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 .

[0244] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0245] 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.

[0246] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0247] In addition, the transmitting / receiving unit 220 may also receive a higher layer parameter indicating antenna switching as a usage of a sounding reference signal (SRS) resource set.

[0248] The control unit 210 may also apply more than 6 SRS ports and more than 6 antenna ports according to the terminal capability information related to the antenna switching.

[0249] The control unit 210 may also use more than 6 SRS ports and more than 8 antenna ports to control the transmission of the SRS in the SRS resource set that is set to periodic or semi-persistent as the resource type.

[0250] The control unit 210 may also use six or more SRS ports and eight or more antenna ports to control the transmission of the SRS in the SRS resource set in which aperiodic is set as the resource type.

[0251] In the case of not supporting a specific terminal capability, the control unit 210 may also control the transmission of the SRS using six or more SRS ports, which is the same number as the number of the antenna ports.

[0252] (Hardware Structure)

[0253] 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.

[0254] 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.

[0255] 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.28 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0256] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be interchangeably used. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0261] 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.

[0262] 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 (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 suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0263] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0264] 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).

[0265] 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.

[0266] 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.

[0267] (Variation Example)

[0268] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be rewritten with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0269] 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).

[0270] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transmitter and receiver in the frequency domain, a specific windowing process performed by a transmitter and receiver in the time domain, and the like.

[0271] 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.

[0272] 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.

[0273] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be replaced with each other.

[0274] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0275] 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.

[0276] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0277] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0278] 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.

[0279] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than that of the long TTI and longer than 1 ms.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0284] 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.

[0285] 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.

[0286] At least one of the set BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0287] 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.

[0288] 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.

[0289] In the present disclosure, the names used for parameters, etc. are not restrictive in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not restrictive in all respects.

[0290] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] 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)).

[0295] 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).

[0296] 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).

[0297] 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.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] 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.

[0302] 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.

[0303] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0304] 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 several other appropriate terms.

[0305] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a moving object, a moving object body, etc.

[0306] The mobile body refers to a movable object, and the moving speed is arbitrary, and of course it also includes the situation where the mobile body stops. The mobile body includes, for example, vehicles, transport vehicles, cars, automatic two-wheeled vehicles, bicycles, networked cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trailers, rickshaws, ships (ships and other watercrafts), airplanes, rockets, artificial satellites, drones, multi-rotor aircraft, quadcopters, balloons and objects carried by them, and are not limited to these. In addition, the mobile body can also be a mobile body that moves autonomously based on operating instructions.

[0307] The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0308] Fig.29 1 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0309] The driving unit 41 is composed of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a handlebar), and performs steering of at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0310] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an ECU (Electronic Control Unit).

[0311] The signals from the various sensors 50-58 include a current signal from a current sensor 50 for sensing the current of the motor, a speed signal of the front wheels 46 / rear wheels 47 obtained by a speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58, and the like.

[0312] The information service unit 59 is composed of various devices such as a car navigation system, an audio system, a speaker, a display, a television, and a radio for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information obtained from an external device via the communication module 60, etc. to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0313] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0314] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents before they happen or reducing the driver's driving load, such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning device (for example, Global Navigation Satellite System (GNSS)), map information (for example, high-precision (High Definition (HD))) map, autonomous vehicle (Autonomous Vehicle (AV)) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS))), artificial intelligence (Artificial Intelligence (AI)) chip, AI processor, and one or more ECUs that control these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 and realizes driving assistance function or autonomous driving function.

[0315] The communication module 60 can communicate with the microprocessor 61 and the components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) between the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 of the vehicle 40 via the communication port 63.

[0316] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received between external devices via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it can also function as at least one of the base station 10 and user terminal 20).

[0317] The communication module 60 may also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted through the communication module 60 may also include information based on the above input.

[0318] The communication module 60 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) transmitted from an external device, and displays it to the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit for outputting information (for example, outputting information to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0319] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. The microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc., which are provided in the vehicle 40 based on the information stored in the memory 62.

[0320] In addition, the base station in the present disclosure may also be rewritten as a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink", "downlink", etc. may also be rewritten as terms corresponding to communication between terminals (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may also be rewritten as sidelink channels.

[0321] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0322] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node (uppernode) 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 the base station, one or more network nodes other than the base station (for example, considering the Mobility Management Entity (MME)), the Serving-Gateway (S-GW), etc., but not limited to these) or a combination thereof.

[0323] 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.

[0324] The various modes / implementations described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems based on these enhancements, corrections, generation or regulations, etc. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0325] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0326] 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.

[0327] The term "determining" used in the present disclosure may include a variety of actions. 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".

[0328] 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)".

[0329] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as a situation where "judgment (decision)" is performed. That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as a situation where "judgment (decision)" is performed.

[0330] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0331] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be rewritten as "access".

[0332] In the present disclosure, when two elements are connected, it is possible to consider being "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.

[0333] 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".

[0334] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0335] 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.

[0336] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: a receiving unit, receiving a high-layer parameter indicating antenna switching as a usage of a sounding reference signal resource set (SRS resource set); and The control unit applies more than 6 SRS ports and more than 6 antenna ports according to the terminal capability information related to the antenna switching.

2. The terminal according to claim 1, wherein: The control unit controls transmission of the SRS in the SRS resource set in which periodicity or semi-persistent is set as a resource type, using the six or more SRS ports and the eight or more antenna ports.

3. The terminal according to claim 1, wherein: The control unit controls transmission of the SRS in the SRS resource set in which aperiodicity is set as a resource type, using the six or more SRS ports and the eight or more antenna ports.

4. The terminal according to any one of claims 1 to 3, wherein: In a case where a specific terminal capability is not supported, the control unit controls transmission of the SRS using the six or more SRS ports, which are the same number as the number of the antenna ports.

5. A wireless communication method of a terminal, comprising: The step of receiving a high-layer parameter indicating antenna switching as a usage of a sounding reference signal resource set (SRS resource set); and According to the terminal capability information related to the antenna switching, more than 6 SRS ports and more than 6 antenna ports are applied.

6. A base station, comprising: a transmitting unit, transmitting a high-layer parameter indicating antenna switching as a usage of a sounding reference signal resource set (SRS resource set); and The receiving unit receives an SRS that is applied to more than 6 SRS ports and more than 6 antenna ports in the terminal according to the terminal capability information related to the antenna switching and is transmitted using the more than 6 SRS ports and the more than 6 antenna ports.

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