Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit for receiving a setting relating to one or a plurality of sounding reference signal (SRS) antenna switchings; and a control unit for performing control so as to report the current state of SRS antenna switching among the SRS antenna switchings set by the setting, by using an upper layer or a lower layer.

Description

Terminal, wireless communication method, and base station

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) was specified with the aim of achieving even higher data rates and lower latency (Non-Patent Literature 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP®) Release (Rel.) 8, 9).

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

[0004] 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

[0005] In future wireless communication systems, the applications of sounding reference signals (SRS) are diverse. For example, NR's SRS is used not only for uplink (UL) CSI measurement but also for downlink (DL) CSI measurement and beam management.

[0006] More specifically, existing specifications allow for antenna switching (which may also be called antenna port switching) as an application for SRS. SRS antenna switching may be used, for example, in a Time Division Duplex (TDD) band when acquiring the downlink CSI using the uplink SRS.

[0007] However, depending on the combination of antenna numbers supported in SRS antenna switching, there may be cases where the SRS antenna switching status / settings cannot be shared between the UE and the base station.

[0008] Therefore, it is required to share the status / settings of SRS antenna switching between the UE and the base station.

[0009] If the regulations regarding these matters are not clear, base stations may not be able to properly receive UL transmissions from terminals, which could hinder improvements in communication quality and throughput.

[0010] Therefore, one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control the transmission and reception of UL transmissions.

[0011] A terminal according to one aspect of the present disclosure includes a receiving unit that receives one or more settings relating to sounding reference signal (SRS) antenna switching, and a control unit that controls the reporting of the current state of SRS antenna switching among the SRS antenna switching set by the settings using a higher layer or a lower layer.

[0012] According to one aspect of this disclosure, the transmission and reception of UL transmissions can be appropriately controlled.

[0013] Figure 1 shows an example of UE assistance information according to this disclosure. Figure 2 shows an example of UE assistance information according to this disclosure. Figure 3 shows an example of an information element (IE) indicating completion of RRC reset according to this disclosure. Figure 4 shows an example of a schematic configuration of a wireless communication system according to one embodiment. Figure 5 shows an example of a base station configuration according to one embodiment. Figure 6 shows an example of a user terminal configuration according to one embodiment. Figure 7 shows an example of a hardware configuration of a base station and user terminal according to one embodiment. Figure 8 shows an example of a vehicle according to one embodiment.

[0014] (SRS) In NR, the Sounding Reference Signal (SRS) has a wide range of applications. The SRS in NR is used not only for measuring channel state information (CSI) on the uplink (UL), which was also used in existing LTE (LTE Rel. 8-14), but also for CSI measurement on the downlink (DL), beam management, and other applications.

[0015] In this disclosure, CSI may include at least one of the following: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), information regarding the channel matrix (or channel coefficients), and information regarding the precoding matrix (or precoding coefficients).

[0016] A UE may configure one or more SRS resources. SRS resources may be identified by an SRS Resource Index (SRI).

[0017] Each SRS resource may have one or more SRS ports (or support one or more SRS ports). For example, the number of ports per SRS may be 1, 2, 4, etc.

[0018] The UE may be configured with one or more SRS resource sets. One SRS resource set may be associated with a predetermined number of SRS resources. The UE may commonly use higher layer parameters for SRS resources included in one SRS resource set. Note that in the present disclosure, a resource set may also be read as a set, a resource group, a group, or the like.

[0019] Information related to SRS resources or resource sets may be configured for the UE using higher layer signaling, physical layer signaling, or a combination thereof.

[0020] The SRS configuration information element (for example, "SRS-Config" in the RRC information element) may include an SRS resource set configuration information element, an SRS resource configuration information element, and the like.

[0021] The SRS resource set configuration information element (for example, "SRS-ResourceSet" of the RRC parameter) may include information of an SRS resource set ID (Identifier) (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type (resourceType), and SRS usage (usage).

[0022] Here, the SRS resource type may indicate the same time domain behavior of the SRS resource configuration, and may indicate any one of Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), and Aperiodic SRS (A(AP)-SRS). Note that the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation). The UE may transmit A-SRS based on an SRS request in DCI.

[0023] Furthermore, the use of SRS (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may include, for example, beam management, codebook (CB), non-codebook (NCB), and antenna switching. For example, SRS for codebook or non-codebook use may be used to determine the precoder for SRI-based codebook-based or non-codebook-based uplink shared channel (PUSCH) transmission.

[0024] For beam management purposes, it may be assumed that only one SRS resource per SRS resource set can transmit in a given time instant. However, if multiple SRS resources behaving in the same time domain within the same Bandwidth Part (BWP) belong to different SRS resource sets, these SRS resources may be transmitted simultaneously.

[0025] The SRS resource configuration information element (for example, the "SRS-Resource" RRC parameter) may include the SRS resource ID (SRS-ResourceId), the number of SRS ports, the SRS port number, the number of transmit combos, the 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-related information, the SRS resource type, the sequence ID, spatial relationship information, etc.

[0026] The value of the transmission combo (transmissionComb) is {2,4}. The number of SRS ports (nrofSRS-Ports) is N. ap SRS The value is {1,2,4}. Antenna port number p i The value of is {1000, 1001, ...}. The number of consecutive OFDM symbols in SRS (nrofSymbols) is N. symb SRSThe value of is {1, 2, 4}. With respect to the start position (startPosition) in the time domain, it represents the offset l of symbols counted in the reverse time domain direction from the end of a slot offset , which is within {0, 1, ... 5}, and the start position is l0=N symb slot -1-l offset given by the above formula.

[0027] The configuration of the number of transmission combs may include a comb offset and a cyclic shift (cyclic shift (CS) index, CS number).

[0028] SRS from UEs, in which at least one of the comb offset (subcarrier offset) = {0, 1, ... K TC -1} and the CS is different, may be multiplexed using the same number of transmission combs, the same RBs and the same symbols.

[0029] The UE may switch a Bandwidth Part (BWP) for SRS transmission every slot, or may switch an antenna. Furthermore, the UE may apply at least one of intra-slot hopping and inter-slot hopping to SRS transmission.

[0030] In an existing SRS, for p i (p_i), the frequency domain start position k0 p_i is given by the following calculation formula. k0 p_i =k - 0 p_i +Σ b=0 BSRS K TC M SC,b SRS n b

[0031] Here, k - represents a variable with an overline on k, and may also be referred to as k-bar. k - 0 p_i may be based on the comb offset K - TC K is the number of transmission combs. M TC is the number of transmission combs. M SC,b SRSis the SRS bandwidth m SRS,b [RB] is the number of subcarriers used for SRS transmission. b It is a constant.

[0032] (UE Sounding Procedure for SRS Antenna Switching / DL CSI Acquisition) In Rel. 15 NR, as described above, antenna switching (which may also be called antenna port switching) can be configured as an application of the SRS. SRS antenna switching may be used, for example, in a Time Division Duplex (TDD) band when acquiring the downlink CSI using the uplink SRS.

[0033] For example, for a UE that has the capability of having fewer antenna ports available for transmission than for reception, the SRS measurement of the UL may be used to determine the DL precoder.

[0034] Furthermore, the UE may report UE capability information to the network indicating the supported SRS transmit (Tx) port switching patterns (e.g., supportedSRS-TxPortSwitch in the RRC parameter srs-TxSwitch). This pattern may be expressed in the form of "txry", such as "t1r2", "t2r4", etc., which may mean that SRS transmission can be performed using x antenna ports out of a total of y antennas, where y may correspond to all or a subset of the UE's receiving antennas.

[0035] In this disclosure, txry and xTyR may be interpreted as mutually interchangeable for (x, y).

[0036] Note that if x and y in "txty" have the same value, it can also be written as xT = xR (for example, 4T = 4R).

[0037] For example, a UE with 2T4R (2 transmit ports, 4 receive ports) may be configured to include two SRS resource sets, each having two ports, for DL ​​CSI acquisition, and whose purpose is antenna switching.

[0038] The UE capability information for an SRS transmit switch (srs-TxSwitch) indicates whether it supports SRS for DL ​​CSI acquisition (DL CSI acquisition, transmit antenna switching, SRS antenna switching). This UE capability information includes the parameter supportedSRS-TxPortSwitch. supportedSRS-TxPortSwitch indicates the SRS Tx port switching pattern supported by the UE. The SRS transmit port switching pattern is a mandatory function with capability signaling.

[0039] In this disclosure, the terms "SRS Tx port switching pattern" and "SRS antenna switching setting" may be interpreted as interchangeable.

[0040] The value of supportedSRS-TxPortSwitch may be 't1r2' for 1T2R, 't2r4' for 2T4R, 't1r4' for 1T4R, 't1r4-t2r4' for 1T4R / 2T4R, 't1r1' for 1T=1R, 't2r2' for 2T=2R, 't4r4' for 4T=4R, or 'notSupported' for non-support.

[0041] The UE antenna switching capability, indicated as xTyR ('txry') by supportedSRS-TxPortSwitch, corresponds to a UE capable of SRS transmission over x antenna ports across a total of y antennas. y corresponds to all or a subset of the UE receiving antennas. For example, 2T4R represents two pairs of antennas.

[0042] A supportedSRS-TxPortSwitch may report at least one of the following values: 't1r2', 't1r4', 't2r4', 't2r2', 't4r4', or 't1r4-t2r4'.

[0043] srs-TxSwitch may include txSwitchImpactToRx and txSwitchWithAnotherBand. txSwitchImpactToRx indicates the lowest band entry number of the UL group (see txSwitchWithAnotherBand below) that affects the DL of this band entry. txSwitchWithAnotherBand indicates the lowest band entry number of the UL group. A UL group is defined as a band entry with ULs that affect each other's ULs. That is, SRS Tx port switching on any cell in that group affects ULs on all cells in that group. If a UL group contains only one band entry, this parameter is not present. In txSwitchImpactToRx and txSwitchWithAnotherBand, a value of 1 means the first entry, and a value of 2 means the second entry. Even if supportedSRS-TxPortSwitch is set to 'notSupported' for a band entry, the UE may include txSwitchImpactToRx and txSwitchWithAnotherBand for that band entry. All DLs and ULs that switch together indicate the same entry number. The entry number is the band entry number within the band combination. The UE is restricted from including fallback band combinations for the purpose of indicating different SRS switching capabilities. Bands containing ULs include bands associated with a FeatureSetUplinkId set to 0, corresponding to support for SRS-SwitchingTimeNR.

[0044] If a UE is configured using an SRS-ResourceSet and the usage (upper layer parameter) within that SRS-ResourceSet is set to 'antennaSwitching', the UE does not assume that different spatial relationships are set for multiple SRS resources within the same SRS-ResourceSet.

[0045] If a UE is configured using an SRS-ResourceSet and the usage (upper layer parameter) within that SRS-ResourceSet is set to antenna switching, the UE may configure one of the following settings 1 to 5, depending on the indicated (reported) UE capability information (which may be UE antenna switching capability information, or UE capability information indicating the SRS transmit port switching pattern (SRS antenna switching configuration) supported by the UE, supportedSRS-TxPortSwitch).

[0046] <Setting 1> Up to two SRS resource sets for 1T2R, with different values ​​set for the resource type (upper layer parameter resourceType) within the SRS resource set. Each set has two SRS resources transmitted in different symbols, and each SRS resource in a given set consists of a single SRS port, and the SRS port of the second resource in the set is associated with a different UE antenna port than the SRS port of the first resource in the same set.

[0047] <Configuration 2> Up to two SRS resource sets for 2T4R, with different values ​​set for the resource type (upper layer parameter resourceType) within the SRS resource set. Each SRS resource set has two SRS resources transmitted in different symbols, and each SRS resource in a given set consists of two SRS ports, and the SRS port pair of the second resource in the set is associated with a different UE antenna port pair than the SRS port pair of the first resource in the same set.

[0048] <Setting 3> For 1T4R, there are zero or one SRS resource set, each having four SRS resources transmitted in different symbols, and the resource type (upper layer parameter resourceType) within the SRS resource set is set periodically or semi-persistently. Each SRS resource in a given set consists of a single SRS port, and the SRS port of each resource is associated with a different UE antenna port.

[0049] <Configuration 4> For 1T4R, there are zero or two SRS resource sets, each having a resource type (upper layer parameter resourceType) set within the SRS resource set, which is set aperiodically, with a total of four SRS resources transmitted in two different slots and different symbols. The SRS ports of each SRS resource in the given two sets are associated with different UE antenna ports. Each of the two sets is configured with two SRS resources, or one set is configured with one SRS resource and the other set with three SRS resources. The UE expects that both of the two sets are configured with the same values ​​for the power control parameters (upper layer parameters alpha, p0, pathlossReferenceRS, and srs-PowerControlAdjustmentStates) within the SRS resource set. The UE assumes that the values ​​of the parameters within each SRS resource set (the upper-layer parameter aperiodicSRS-ResourceTrigger, a parameter indicating the code point of the SRS request field in DCI) are the same, and that the values ​​of the upper-layer parameter slotOffset within each SRS resource set are different.

[0050] <Setting 5> Up to two SRS resource sets, each having one SRS resource for 1T=1R, 2T=2R, or 4T=4R. The number of SRS ports for each resource is 1, 2, or 4.

[0051] If the UE sets the use within the SRS resource set to antenna switching, the UE may configure the SRS antenna switching settings based on the reported UE capability information (supportedSRS-TxPortSwitch, supportedSRS-TxPortSwitch-v1610).

[0052] If a set of SRS resources is transmitted within the same slot as a Y symbol, the UE sets a guard period for the Y symbol during which the UE does not transmit any other symbols. The guard period is between the SRS resources of that set.

[0053] If the indicated UE capability is 1T4R / 2T4R, the UE assumes that all SRS resources within the SRS resource set will be configured with the same number of SRS ports, either 1 or 2.

[0054] If the indicated UE capability is 1T2R, 2T4R, 1T4R, or 1T4R / 2T4R, the UE does not expect to configure or trigger more than one SRS resource set with an application (upper layer parameter usage) set for antenna switching in the same slot. If the indicated UE capability is 1T1R, 2T2R, or 4T4R, the UE does not expect to configure or trigger more than one SRS resource set with an application (upper layer parameter usage) set for antenna switching in the same symbol.

[0055] UE capability information for SRS transmit switches (srs-TxSwitch-v1610) may include the parameter supportedSRS-TxPortSwitch-v1610. Reporting of this parameter is optional. supportedSRS-TxPortSwitch-v1610 indicates a downgrading configuration of the SRS transmit port switching pattern, and reporting of this parameter is optional. When a UE indicates support for a downgrading configuration of the SRS transmit port switching pattern using supportedSRS-TxPortSwitch-v1610, it may report at least one of the following values ​​to indicate support for the downgrading configuration, based on what is reported within supportedSRS-TxPortSwitch.・'t1r1-t1r2' ・'t1r1-t1r2-t1r4' ・'t1r1-t1r2-t2r2-t2r4' ・'t1r1-t2r2' ・'t1r1-t2r2-t4r4' ・'t1r1-t1r2-t2r2-t1r4-t2r4'

[0056] In this disclosure, the terms "downgrade setting," "downgrade antenna switching setting," and "SRS Tx port switching pattern using fewer antennas / ports than the total number of antennas / total number of antennas / total number of Rx antennas / maximum number of Rx ports" may be interpreted interchangeably.

[0057] Rel. 17 UE capability signaling (srs-AntennaSwitchingBeyond4RX-r17) indicates whether the UE supports SRS antenna switching for more than four Rx. Its capability signaling has several parameters: - supportedSRS-TxPortSwitchBeyond4Rx-r17. This indicates the supported xTyR combinations. It is an 11-bit bitmap. The bitmap starts from the first / leftmost bit (bit 0). Each bit corresponds to {t1r1, t2r2, t1r2, t4r4, t2r4, t1r4, t2r6, t1r6, t4r8, t2r8, t1r8}. In any indication value, x is less than or equal to the value associated with the largest y. - entryNumberAffectBeyond4Rx-r17. This indicates the entry number of the band listed first with UL within the band combination affecting this DL. - entryNumberSwitchBeyond4Rx-r17. This indicates the entry number of the band listed first with this UL within the band combination that switches with UL.

[0058] UEs that demonstrate support for this capability indicate support for srs-TxSwitch.

[0059] If the same xYyR value reported using supportedSRS-TxPortSwitch / supportedSRS-TxPortSwitch-v1610 is reported within supportedSRS-TxPortSwitchBeyond4Rx-r17, the reported values ​​for entryNumberAffectBeyond4Rx-r17 and entryNumberSwitchBeyond4Rx-r17 are invalid.

[0060] In this disclosure, the terms "SRS transmission port switching pattern" and "antenna switching SRS setting" may be interpreted as interchangeable.

[0061] Rel. 18 UE capability signaling (srs-AntennaSwitching8T8R-r18) indicates whether the UE supports SRS 8T8R for antenna switching. Its capability signaling has several parameters: - antennaSwitch8T8R-r18. This indicates the supported types of 8T8R for antenna switching. - downGradeConfig-r18. This indicates the supported xTyR combinations for downgrade antenna switching configuration. It is an 11-bit bitmap. The bitmap starts from the first / leftmost bit (bit 0). Each bit corresponds to {1T1R, 1T2R, 1T4R, 1T6R, 1T8R, 2T2R, 2T4R, 2T6R, 2T8R, 4T4R, 4T8R}.

[0062] Rel. 19 UE capability may indicate support for 3T6R / 3T3R.

[0063] (Analysis) By the way, the following can be given as examples of methods for determining the DL MIMO precoder on the base station (gNB) side.

[0064] (Method 1) The base station may configure SRS antenna switching. For example, the base station may use channel reciprocity (also called channel reciprocity, etc.) to obtain / acquire channel information based on the SRS reception result. Furthermore, the base station may determine the corresponding precoder based on the channel information.

[0065] (Method 2) The base station may acquire / obtain relevant parameters by CSI feedback / PMI feedback. Furthermore, the base station may determine the corresponding precoder based on these parameters.

[0066] In the case of TDD, the base station can reduce the CSI overhead by applying, for example, Method 1.

[0067] Furthermore, the UE reports the number of antennas [ports] (Tx count / Rx count) supported in SRS antenna switching in its capability information. Here, Tx count may mean the number of transmitting antennas [ports], and Rx count may mean the number of receiving antennas [ports].

[0068] The base station sets the number of antennas (Tx count / Rx count) for SRS antenna switching based on the received (reported) capability information.

[0069] Specifically, for example, if a UE is capable of 2-antenna transmission (transmission using two antennas [ports]) and 4-antenna reception (reception using four antennas [ports]), it may report in its capability information (UE capability) that it supports {2T4R} SRS antenna switching.

[0070] If the UE is configured for {2T4R} SRS antenna switching, the SRS may be transmitted while switching the transmitting antenna as follows: - Use antennas #0 and #1 for SRS resource #1. - Use antennas #2 and #3 for SRS resource #2.

[0071] A base station that receives the SRS can recognize the channels of all receiving antennas when the UE is receiving with four antennas (4Rx).

[0072] Furthermore, as mentioned above, support for downgrading SRS antenna switching settings is also being considered.

[0073] For example, consider a scenario where the UE supports {2T4R} and {1T2R} SRS antenna switching, and the base station configures the {2T4R} SRS antenna switching.

[0074] In this case, the UE can perform SRS transmission with {2T4R} SRS antenna switching applied.

[0075] However, even when DL data is not transmitted from the base station, if SRS transmission is performed using {2T4R} SRS antenna switching, the power / power supply corresponding to the antennas for 2-antenna transmission (2Tx) cannot be turned off, resulting in wasted power consumption for 2Tx.

[0076] Here, it is desirable to switch the SRS antenna switching settings according to the DL data or the state of the UE (e.g., Discontinuous Reception (DRX), RRC connected, RRC idle, RRC inactive, etc.). This makes it possible to effectively reduce the power consumption of the UE.

[0077] On the other hand, even if the base station has set the SRS antenna switching to {2T4R} for the UE, there may be cases where the UE unilaterally applies {1T2R} SRS antenna switching and transmits SRS [because downgrade settings are supported].

[0078] In this case, the base station may lose faith in the received SRS information (it may not be able to properly judge / recognize the SRS information). As a result, it is anticipated that the base station may not be able to properly measure the channel status, and furthermore, may not be able to determine the appropriate DL MIMO precoder.

[0079] Therefore, in such cases (cases where the UE spontaneously switches the SRS antenna switching settings), it is necessary for the UE and the base station to share information regarding the SRS antenna switching status / settings.

[0080] If these are realized, power consumption on the UE side can be reduced, and the base station side will be able to appropriately measure the channel status based on the SRS information transmitted from the UE, and appropriately determine the DL MIMO precoder.

[0081] Therefore, the inventors investigated control methods for SRS transmission that could realize these goals and conceived the following embodiments.

[0082] The embodiments of this disclosure will be described in detail below with reference to the drawings. Each wireless communication method according to the embodiments may be applied individually or in combination.

[0083] (Various substitutions) In this disclosure, words enclosed in parentheses () may indicate an explanation of the preceding word (e.g., an explanation of spelling), a paraphrase, a specific example, or supplementary explanation. Also, in this disclosure, words enclosed in square brackets ([]) may be interpreted as part of the overall meaning of the text, or they may be interpreted as being excluded (ignored). Note that parentheses () and square brackets ([]) may be used for purposes / meanings other than those described above.

[0084] In this disclosure, "A / B" and "at least one of A and B" may be interpreted as mutually exclusive. In this disclosure, "A / B / C" may mean "at least one of A, B, and C".

[0085] In this disclosure, terms such as notice, activate, deactivate, indicate (or specify), select, configure, update, and determine may be interpreted interchangeably. In this disclosure, terms such as support, control, controllable, operate, and capable of operating may be interpreted interchangeably.

[0086] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, fields, Information Elements (IE), settings, etc., may be interpreted interchangeably. In this disclosure, Medium Access Control elements (MAC Control Elements (CE)), update commands, activation / deactivation commands, etc., may be interpreted interchangeably.

[0087] In this disclosure, the upper-layer signaling may be any or a combination thereof, such as Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and other messages (e.g., messages from the core network, such as positioning protocol messages (e.g., NR Positioning Protocol A (NRPPPa) / LTE Positioning Protocol (LPP)) messages).

[0088] In this disclosure, MAC signaling may include, for example, MAC Control Elements (MAC CEs) and MAC Protocol Data Units (PDUs). Broadcast information may include, for example, Master Information Blocks (MIBs), System Information Blocks (SIBs), Remaining Minimum System Information (RMSIs), and Other System Information (OSIs).

[0089] In this disclosure, physical layer signaling may include, for example, Downlink Control Information (DCI) and Uplink Control Information (UCI).

[0090] In this disclosure, ceil(x), ceiling function, and ceiling function may be interpreted as interchangeable. In this disclosure, floor(x), floor function, and floor function may be interpreted as interchangeable. In this disclosure, sqrt(x), square root of x, and root x may be interpreted as interchangeable. In this disclosure, x mod y, mod(x, y), mod function, and modulo operation may be interpreted as interchangeable. In this disclosure, Σ i=M M+N-1 f(i), Σ i=MM+N-1 f i f(i) or f over i = M, M+1, ..., M+N-1 i The sum of f(M) + f(M+1) + ... + f(M+N-1), f M +f M+1 +...+f M+N-1 , can be read interchangeably. C(n,k) is the number of combinations of choosing k values ​​from n values ​​(combinatorial coefficient), binomial coefficients, n C k , C n k , may be interpreted as mutually exclusive. In this disclosure, x / / y and floor(x / y) may be interpreted as mutually exclusive.

[0091] In this disclosure, A b The notations A_b, Ab, and A with a b placed to the lower right may be interpreted as interchangeable. In this disclosure, A c The notation A^c, with a c superscripted above A, may be interpreted as interchangeable. In this disclosure, A b c The notation A_b^c, where b is placed to the lower right of A and c is placed to the upper right of A, may be interpreted as being interchangeable. In this disclosure, x ~ x may be represented by placing a ~ above x, or it may be called x tilde. In this disclosure, x - x may be represented by placing a hyphen above it, or it may be called an x-bar. In this disclosure, x ＾ This can also be represented by placing a caret (^) above x, or it may be called an x-hat.

[0092] In this disclosure, FR may be at least one of FR1, FR2, FR2-1, FR2-2, FR3, subterahertz, and terahertz. In this disclosure, the frequency range corresponding to FR1 may be 410–7125 MHz. In this disclosure, FR2 may include FR2-1 and FR2-2, the frequency range corresponding to FR2-1 may be 24250–52600 MHz, and the frequency range corresponding to FR2-1 may be 52600–71000 MHz.

[0093] In this disclosure, the following abbreviations may be used: ◆FDM: frequency division multiplexing ◆TDM: time division multiplexing ◆CDM: spatial division multiplexing

[0094] In the RRC IE (parameters) of this disclosure, {1,2,...,i} and {n1,n2,...,ni} may be interpreted as mutually interchangeable, where i is an integer.

[0095] In this disclosure, [Start] OFDM symbol [Position / Index], [Start] symbol [Position / Index], and [Start] position may be interpreted as interchangeable.

[0096] In this disclosure, different slots, multiple slots, different multiple slots, etc., may be interpreted as equivalent to one another.

[0097] In this disclosure, the statements that X is set for each SRS [resource [set]], that X is set by an SRS [resource [set]] setting, and that X is set within an SRS [resource [set]] setting may be interpreted interchangeably.

[0098] In this disclosure, settings, instructions, information, setting information, instruction information, etc., may be interpreted interchangeably.

[0099] In this disclosure, terms such as index, identifier (ID), indicator, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, subset, etc., may be interpreted interchangeably.

[0100] In this disclosure, the terms used include: panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmit entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relationship, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), Antenna port (e.g., Demodulation Reference Signal (DMRS) port), Antenna port group (e.g., DMRS port group), Group (e.g., Spatial relationship group, Code Division Multiplexing (CDM) group, Reference Signal group, CORESET group, Physical Uplink Control The following terms may be interchangeable: Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, quasi-co-location (QCL), QCL assumption, etc.

[0101] In this disclosure, the names of parameters / information are merely examples. For example, the notation "-rxx" (e.g., xx is 19) indicating the release number listed in each parameter does not have to be included in each parameter, and different numbers may be indicated.

[0102] (Wireless Communication Method) The embodiments of this disclosure relating to SRS antenna switching can be broadly classified as follows: • First embodiment: Reporting of antenna switching settings / status by the upper layer. • Second embodiment: Reporting of antenna switching settings / status by the lower layer. • Third embodiment: Control of antenna switching status / settings primarily by the base station. Each embodiment will be described below based on these.

[0103] In this disclosure, each embodiment / option may be applied individually or in combination with others.

[0104] The UE may control UL transmission (e.g., SRS transmission) by applying the embodiments described later. The UE may also send various requests for said UL transmission to the base station. The base station (NW / BS / gNB) may provide / transmit settings / instructions etc. to the UE to enable said control. Furthermore, the NW / BS / gNB may perform various controls to receive said UL transmission from the UE.

[0105] Each embodiment of this disclosure may be applied / executed only when the corresponding function is configured by a higher layer, or only when the corresponding function is reported by UE capabilities.

[0106] <First Embodiment> The first embodiment relates to the reporting of antenna switching settings / status by the upper layer.

[0107] The UE may use higher-layer reports to report its current SRS antenna switching settings / status to the base station. These higher-layer reports may be RRC parameters that the UE can transmit (e.g., UE assistance information).

[0108] <<Example of Specification Description>> The following is an example of how to describe the specification. The UE may perform / control reporting / transmitting UE assistance information in accordance with the following.

[0109] (UE Assistance Information) ((General)) The purpose of this procedure is for the UE to notify the network of at least one of the following pieces of information (which may also be called UE status information, etc.): - Delay budget report that carries / communicates the desired increment / decrement in the connected mode DRX cycle length. - Overheating assistance information. - In-device coexistence (IDC) assistance information. - Current SRS antenna switching pattern (xTyR), duration, and expected periodicity. - Preference in DRX parameters for power saving.

[0110] ((Initiation)) In the RRC_CONNECTED state, a UE capable of providing a delay budget report may initiate this procedure in some cases. These cases include, for example, when the UE is configured to provide a delay budget report, or when the UE changes its delay budget preference.

[0111] A UE capable of providing overheating assistance information in the RRC_CONNECTED state may initiate this procedure in several cases. These cases include, for example, when the UE is configured to provide overheating assistance information, when the UE detects internal overheating, or when the UE detects that the overheating condition has ceased.

[0112] In the RRC connection state (RRC_CONNECTED), a UE capable of providing [SRS] antenna switching assistance information may initiate this procedure in several cases. These cases include, for example, when the UE is configured to provide [SRS] antenna switching assistance information, when the UE detects a change in the [SRS] antenna switching pattern, or when the UE detects a change in the duration of the antenna switching pattern.

[0113] In the RRC_CONNECTED state, a UE capable of providing IDC assistance information may initiate this procedure in several cases. These cases include, for example, when the UE is configured to provide IDC assistance information, when an IDC problem is detected after the UE has not sent IDC assistance information since being configured to provide IDC instructions, or when the UE modifies IDC problem information.

[0114] In the RRC_CONNECTED state, a UE capable of providing preferences in the DRX parameters for a single cell group for power saving may initiate this procedure in several cases. These cases include, for example, when the UE has already set preferences in the DRX parameters, or when the UE changes preferences in the DRX parameters.

[0115] ((Actions related to sending UE assistance information messages)) The UE may set the content of the UE assistance information message as follows:

[0116] <Example 1> If the transmission of a UE assistance information message is initiated to provide a delayed budget report in accordance with the rules described above (1>), the UE sets the delayed budget report to type 1 according to the desired value (2>).

[0117] <Example 2> If the transmission of a UE assistance information message is initiated to provide antenna switching assistance information in accordance with the rules described above (1>), if the UE experiences a change in the antenna switching pattern (2>), the UE may include an Antenna Switching Pattern parameter (3>) in the Antenna Switching Pattern Assistance Information Element (IE), a periodicity parameter (3>) in the Antenna Switching Pattern Assistance IE, or an expected periodicity parameter (3>) in the Antenna Switching Pattern Assistance IE.

[0118] <<Details of the UE Assistance Information Field>> Examples of UE assistance information can be found in Figures 1 and 2. Figures 1 and 2 are diagrams showing examples of UE assistance information in this disclosure.

[0119] As shown in Figure 1, the IE of existing UE assistance information (e.g., UEAssistanceInformation) may include the IE of new / Rel. 19 antenna switching pattern (e.g., antennaSwitchingPatternAssistance-r19).

[0120] New UE assistance information may include at least one of the following parameters / fields: • Antenna switching pattern. • Duration. • Periodicity.

[0121] The field relating to the antenna switching pattern may indicate the current antenna switching pattern of the UE (as applied by the UE). For example, the field may indicate one of the following antenna switching patterns: {1T1R, 2T2R, 3T3R, 4T4R, 8T8R, 1T2R, 2T4R, 1T4R, 1T6R, 1T8R, 2T6R, 2T8R, 2T6R, 4T8R}.

[0122] The duration field may indicate the duration of the UE's current antenna switching pattern (corresponding SRS resource symbols [number]). Alternatively, the field may indicate the time length (symbols) required to perform the antenna switching.

[0123] The period field may indicate the expected period of the UE's current antenna switching pattern (the period of the corresponding SRS resource). Alternatively, the field may indicate the period (symbol) during which antenna switching is performed.

[0124] Furthermore, as shown in Figure 2, parameters related to the antenna switching pattern may be directly included as new assistance information within the IE of existing UE assistance information. These parameters may include the parameters / fields related to the antenna switching pattern, duration, and period described above.

[0125] <<Other Information>> Under the current specifications, reporting UE assistance information is not mandatory for UEs. In other words, it is up to the UE whether or not to report UE assistance information.

[0126] Therefore, from the base station's perspective, if the UE [voluntarily / autonomously] switches the SRS antenna switching settings (for example, if a UE configured for 2T4R switches to 1T2R, or subsequently switches back to 2T4R), it is preferable for the UE to report UE assistance information each time (each time a switch occurs).

[0127] Alternatively, if a change occurs in the state of the UE (for example, from RRC idle / RRC inactive state to RRC connected state), it is preferable for the UE to report UE assistance information each time (each time the state changes).

[0128] On the other hand, from the perspective of UE power consumption, it is assumed that the SRS antenna switching settings will change in time units larger than the symbol / slot units. In other words, it is not expected that the settings will change frequently in relatively short time units.

[0129] Therefore, it is considered sufficient to report the switching of SRS antenna switching settings using a higher layer, rather than using dynamic reporting with UCI / MAC CE, etc.

[0130] These measures reduce power consumption on the UE side, and enable the base station to appropriately measure the channel status based on the SRS information transmitted from the UE, thereby enabling the appropriate determination of the DL MIMO precoder.

[0131] <<Variation 1>> The above example describes a case where the UE reports the current SRS antenna switching settings / state, but it is not limited to this. For example, the UE may report one or more SRS antenna switching settings / states (applicability of antenna switching patterns) that it may choose.

[0132] More specifically, if a UE configured with {2T4R} reports that it may apply either {2T4R or 1T2R}, the base station can control SRS reception assuming that an SRS applying either {2T4R or 1T2R} will be transmitted from the UE.

[0133] When receiving SRS signals, the base station can determine whether either {2T4R or 1T2R} is applied by performing power measurement / determination for each SRS receiving port.

[0134] Furthermore, the example described involved two antenna switching patterns. However, depending on the capabilities of the UE, the number of applicable antenna switching patterns may increase to three or more.

[0135] Therefore, the base station may set the maximum number of applicable antenna switching patterns (which may also be called candidate configuration patterns, etc.) for the UE. This limits the number of candidate configuration patterns reported by the UE. As a result, the base station can simplify its expected operation (number of checks) during reception and reduce its load.

[0136] <<Variation 2>> In the example above, we described a case where UE assistance information is used as a report from the upper layer, but this is not the only case. The report from the upper layer may also be achieved by a parameter related to the completion of RRC reconfiguration (RRCReconfigurationComplete).

[0137] Figure 3 shows an example of an information element (IE) indicating completion of RRC resetting according to this disclosure. As shown in Figure 3, the IE for completion of RRC resetting may directly include parameters related to the antenna switching pattern as new parameters. These parameters may include the parameters / fields related to the antenna switching pattern, duration, and period described above.

[0138] The new parameter may be included directly in RRCReconfigurationComplete, in a specific UL message (UL-DCCH-Message) in which RRCReconfigurationComplete is stored, or in any message under that specific UL message.

[0139] Furthermore, the second variation may be applied when the UE assistance information does not contain any new parameters.

[0140] Alternatively, Modification 2 may also apply when new parameters are included in the UE assistance information. That is, the new parameters in this embodiment may be included in both the UE assistance information and the parameters related to the completion of RRC reconfiguration. In this case, the UE may report the parameters related to the completion of RRC reconfiguration only when a change occurs in the state of the UE (for example, from RRC idle / RRC inactive state to RRC connected state), and otherwise report the UE assistance information.

[0141] According to this embodiment, the method for reporting the antenna switching settings / status by the upper layer becomes clear. This reduces power consumption on the UE side, and on the base station side, it becomes possible to appropriately measure the channel status based on the SRS information transmitted from the UE and appropriately determine the DL MIMO precoder.

[0142] <Second Embodiment> The second embodiment relates to reporting the antenna switching status by the lower layer.

[0143] The UE may report the current SRS antenna switching status to the base station using a lower-layer report. This lower-layer report may be any of the MAC CE, UCI, or any physical channel (e.g., SRS / PUCCH / PUSCH) that the UE can transmit.

[0144] <<Aspect 2-1>> The following describes variations in the method for reporting the current SRS antenna switching status of the UE. The following methods may be applied individually or in any combination.

[0145] (Method 1) The UE may have multiple candidate SRS antenna switching states / settings configured by the higher layer. The UE may report to the base station which of the configured candidates is currently using / applying the antenna switching pattern.

[0146] For example, if the UE has been set by the base station as a candidate for the SRS antenna switching status / setting {2T4R, 1T2R}, the UE may report in a field of a predetermined bit (e.g., 1 bit) (a predetermined number of bits) that it is currently using / applying either {2T4R, 1T2R}.

[0147] The number of bits in the reporting field may be predefined by the specification, set / instructed by upper-layer signaling / physical-layer signaling, or determined according to UE capabilities. Alternatively, the number of bits in the reporting field may be determined based on the number of possible candidate patterns (antenna switching patterns). For example, if there are two candidate patterns, the number of bits in the reporting field may be 1.

[0148] (Method 2) The UE may configure one or more SRS antenna switching based on existing specifications. The UE may report to the base station which antenna switching pattern from the downgraded capability is being used / applied for the status / configuration of one configured SRS antenna switching.

[0149] Downgrade capability means supporting an antenna switching pattern (which may also be called a downgrade antenna switching pattern, etc.) that uses fewer antennas than the set maximum number of antennas, or it may mean such an antenna switching pattern.

[0150] For example, if a UE is configured with {2T4R} SRS antenna switching from a base station, the UE may report in a field of a predetermined number of bits (e.g., 1 bit) that it is currently using / applying one of the {1T2R, 1T4R, 2T4R, 2T2R, 3T3R} antenna switching patterns, which include downgrade capability corresponding to that configuration.

[0151] The number of bits in the reporting field may be predefined by the specification, set / instructed by upper-layer signaling / physical-layer signaling, or determined according to UE capabilities. Alternatively, the number of bits in the reporting field may be determined based on the number of antenna switching patterns that can be set. For example, if there are two antenna switching patterns, the number of bits in the reporting field may be 1.

[0152] Furthermore, in order to reduce the number of bits in the reporting field, the number (combinations) of antenna switching patterns that the UE can report may be limited by specifications / settings / instructions / UE capabilities, etc.

[0153] (Method 3) The UE may report to the base station which of the candidate SRS antenna switching settings reported by capability information (UE capability) is currently being used / applied.

[0154] For example, if the UE reports {2T4R, 1T2R} as candidate settings for SRS antenna switching, the UE may report in a field of a predetermined number of bits (e.g., 1 bit) that either {2T4R, 1T2R} is currently in use / applied.

[0155] The number of bits in the reporting field may be predefined by the specification, set / instructed by upper-layer signaling / physical-layer signaling, or determined according to UE capabilities. Alternatively, the number of bits in the reporting field may be determined based on the number of possible candidate patterns (antenna switching patterns). For example, if there are two candidate patterns, the number of bits in the reporting field may be 1.

[0156] <<Aspect 2-2>> The following describes the signaling for the reporting method of Aspect 2-1. The UE may control the reporting of Aspect 2-1 by applying at least one of the following options.

[0157] (Opt1) The UE may use MAC CE to transmit the above report (for example, the current SRS antenna switching status).

[0158] The UE may use an existing UL MAC CE or a new MAC CE (with a new LCID) to report the current SRS antenna switching status to the base station.

[0159] Existing / new MAC CEs may include additional fields for the report (which may be repurposed from existing fields). These fields may indicate the current SRS antenna switching status of the UE.

[0160] Existing MAC CEs may be, for example, MAC CEs for PHRs.

[0161] (Opt2) The UE may use the UCI to transmit the above report (for example, the current SRS antenna switching status).

[0162] The UE may use the UCI [field] to report the current SRS antenna switching status to the base station.

[0163] If SRS antenna switching is configured by a higher layer, the relevant UCI [field] may exist (may be reported / inserted).

[0164] In existing UCIs, the position (bit order / priority) of the reporting field may be predefined by the specification. For example, the reporting field may be inserted / added between existing XX and YY fields.

[0165] The reporting time domain type (reporting type) may be set to at least one of the following: periodic, semi-persistent, or aperiodic.

[0166] UCI omission rules / priority rules may be stipulated. For example, it may be stipulated which of the above reporting UCIs will be reported preferentially when compared with other UCIs. Other UCIs may be, for example, UCIs for HARQ, L1 beam reports, CQI / PMI, etc.

[0167] For example, the reporting UCI in this disclosure may have a lower priority than the UCI for HARQ.

[0168] (Opt3) The UE may transmit the above report (e.g., the current SRS antenna switching status) using a physical channel. The physical channel may be, for example, SRS / PUCCH / PUSCH.

[0169] A UE may be configured with multiple SRS resources / resource sets. The UE may report the current SRS antenna switching status by indicating which of the configured SRS resources / resource sets it transmits.

[0170] For example, if a UE is configured with SRS resource #1 (1T2R) and SRS resource #2 (2T4R), the UE may report the current SRS antenna switching status depending on which resource it transmits from.

[0171] The base station can recognize / determine which SRS resource has been transmitted by measuring the received power of each SRS resource, #1 and #2. In other words, the base station can recognize / determine the current state of SRS antenna switching from the received power of the corresponding SRS resource.

[0172] (Opt3-1) The UE may report the current SRS antenna switching status using the SRS / PUCCH / PUSCH or its DMRS transmission sequence / resource.

[0173] For example, a UE may be configured with transmission sequences / resources corresponding to 1T2R and transmission sequences / resources corresponding to 2T4R. The UE may report the current SRS antenna switching status depending on which of the configured transmission sequences / resources it is transmitting.

[0174] A base station can recognize and determine which transmission sequence / resource has been transmitted by measuring the received power of the transmission sequence / resource corresponding to the state of each SRS antenna switching. In other words, a base station can recognize and determine the current state of SRS antenna switching from the received power of the corresponding transmission sequence / resource.

[0175] According to this embodiment, the method for reporting the antenna switching status by the lower layer becomes clear. This reduces power consumption on the UE side, and on the base station side, it becomes possible to appropriately measure the channel status based on the SRS information transmitted from the UE and appropriately determine the DL MIMO precoder.

[0176] <Third Embodiment> The third embodiment relates to the control of the state / settings of base station-based antenna switching.

[0177] In the first and second embodiments described above, we explained a case in which the UE switches the state / setting of the SRS antenna switching and reports it to the base station.

[0178] However, in some cases, it is conceivable that the base station may not be able to properly control the SRS antenna switching state / settings. In such cases, it is preferable for the base station to be able to control the SRS antenna switching state / settings. This is advantageous because it allows the base station to acquire the necessary CSI information at the required time.

[0179] Therefore, I propose the following:

[0180] The UE may send a request for the desired SRS antenna switching state / setting. The UE does not need to switch / must not switch the SRS antenna switching state / setting until it receives a response / instruction from the base station to that request.

[0181] Responses / instructions from the base station may be notified via RRC / MAC CE / DCI, etc. Such responses / instructions from the base station may include one bit of information (field) indicating "permission / approval" or "denial / rejection" of the request from the UE.

[0182] For example, if the UE is notified of "permission / approval" by the field, the UE may switch / update the SRS antenna switching state / settings based on the previous request.

[0183] Alternatively, if the UE is notified of a "denial / rejection" by the field, the UE may maintain / continue the current SRS antenna switching state / setting.

[0184] The response / instruction from the base station may include the selection / instruction of an SRS resource / resource set, an instruction to change some parameters of an SRS resource / resource set, an instruction to change the status / setting of the SRS antenna switching, etc.

[0185] For example, a base station may pre-configure SRS resource #1 (1T2R) and SRS resource #2 (2T4R) for the UE. Furthermore, if the base station receives the above request from the UE (a request for the desired SRS antenna switching state / configuration), it may send an instruction to change the corresponding SRS resource based on that request.

[0186] Upon receiving the change instruction, the UE may switch / update the SRS antenna switching state / settings based on the change instruction.

[0187] (Other) The operation of switching the state / setting of SRS antenna switching on the UE side may be limited to UEs that support multiple SRS antenna switching settings (e.g., {1T2R, 2T4R}) (and have reported the corresponding UE capability).

[0188] For example, a UE that only supports 2T4R (and reports 2T4R capability) is not allowed to switch / change to other SRS antenna switching settings (e.g., 1T2R) once 2T4R is configured.

[0189] These restrictions on the UE side limit (restrict) the number of SRS antenna switching configuration patterns that the base station can anticipate. As a result, it becomes possible to simplify the base station operation.

[0190] Alternatively, the operation of switching the SRS antenna switching state / setting on the UE side may be limited to UEs that support one or more SRS antenna switching settings (and have reported the corresponding UE capability).

[0191] In other words, a UE that only supports 2T4R (and reports the capability of 2T4R) may switch / change to other SRS antenna switching settings (e.g., 1T2R).

[0192] This allows the UE to appropriately reduce power consumption.

[0193] The configuration of multiple SRS antenna switching may be intended to support at least some of the same or smaller Tx / Rx numbers as the largest Tx / Rx number among the settings supported by the UE.

[0194] In other words, a UE configured with a certain SRS antenna switching may support not only the corresponding antenna switching pattern but also a downgrade setting for that antenna switching pattern.

[0195] For example, a UE that supports {2T4R} may support at least one (i.e., some or all) of {1T1R, 1T2R, 1T4R, 2T2R, 2T4R}.

[0196] According to this embodiment, the base station can transmit instructions to change the state / settings of the SRS antenna switching in response to a request from the UE.

[0197] (Supplement) <<Notification of Information to UE>> In the embodiments described above, notification of any information from the Network (NW) (e.g., Base Station (BS)) to the UE (in other words, reception of any information from the BS at the UE) may be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC messages, LTE positioning protocol (LPP) messages), specific signals / channels (e.g., DCI, PDCCH, PDSCH, reference signals), or a combination thereof.

[0198] When the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new Logical Channel ID (LCID) not defined in existing standards in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may introduce a new octet into an existing MAC CE.

[0199] If the above notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble the Cyclic Redundancy Check (CRC) bits assigned to the DCI, or the format of the DCI. The specific field may be an existing DCI field or a new DCI field. The RNTI may be an existing RNTI or a new RNTI. The format of the DCI may be an existing DCI format or a new DCI format.

[0200] Furthermore, notification of any information to the UE in the above-described embodiment may be periodic, semi-persistent (triggered by the UE or gNB), or aperiodic (triggered by the UE or gNB).

[0201] In the embodiments described above, the UE may receive information from the NW of at least one of the following QCL rules: ◆ QCL Type A ◆ QCL Type B ◆ QCL Type C ◆ QCL Type D

[0202] In the embodiments described above, the QCL source RS for each QCL type may be at least one of the following RSs: ◆SSB ◆CSI-RS with / without repetition ◆TRS ◆DMRS for PDCCH / PDSCH

[0203] In the embodiments described above, information from the network may be set / instructed by the following methods: ◆ Common to multiple UEs, or individual to a UE ◆ Cell-specific, or common to multiple cells ◆ Per UE / Per CC / Per BWP / Per band / Per cell / Per cell group (CG)

[0204] <<Notification of Information from UE>> Notification of any information from the UE to the NW in the embodiments described above (in other words, transmission / reporting of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC messages, LPP messages), specific signals / channels (e.g., UCI, PUCCH, PUSCH, PRACH, reference signals), or a combination thereof.

[0205] When the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new LCID not specified in existing standards in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may introduce a new octet into an existing MAC CE.

[0206] If the above notice is made by the UCI, the notice may be transmitted using PUCCH or PUSCH.

[0207] Furthermore, the notification of any information from the UE in the above-described embodiments may be periodic, semi-persistent (triggered by the UE or gNB), or aperiodic (triggered by the UE or gNB).

[0208] <<Regarding the application of each embodiment>> In UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the embodiments described above may be applied (or used) if any or more of the following conditions are met: ◆ A higher-layer parameter indicating the specific process / operation / control / assumption / information is set; ◆ The specific process / operation / control / assumption / information is determined based on the relevant higher-layer parameter; ◆ The specific process / operation / control / assumption / information is instructed / specified / activated / triggered by MAC CE / DCI / UCI / Resource / Channel / RS; ◆ A specific UE capability indicating (or related to) the specific process / operation / control / assumption / information is reported or supported; ◆ The application of the specific process / operation / control / assumption / information is determined based on specific conditions.

[0209] The above-mentioned specific UE capabilities may represent at least one of the following: ◆ Supporting the above-mentioned specific processing / operation / control / assumption / information; ◆ Capabilities of each embodiment; ◆ Capabilities of each option in each embodiment, or the capabilities of a combination of multiple options in each embodiment; ◆ Capabilities of each choice in each embodiment, or the capabilities of a combination of multiple choices in each embodiment.

[0210] Furthermore, the above-mentioned specific UE capability may be a capability that applies across all frequencies (commonly regardless of frequency), a capability per frequency (e.g., one or a combination thereof, such as cell, band, band combination, BWP, component carrier, etc.), a capability per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), a capability per subcarrier spacing (SCS), or a capability per feature set (FS) or feature set per component-carrier (FSPC).

[0211] Furthermore, the specific UE capabilities described above may be capabilities that apply across all duplexing schemes (common to all duplexing schemes regardless of the duplexing scheme), or they may be capabilities specific to each duplexing scheme (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0212] If the above conditions are not met, UE / BS may follow the behavior specified in existing 3GPP releases.

[0213] Information regarding whether one or more of the above embodiments / options / choices / examples apply / are used, or which of the above embodiments / options / choices / examples apply / are used, may be based on several of the following methods: ◆ The information is set by one or more higher layer parameters / RRC IEs. ◆ The information is determined by one or more relevant higher layer parameters / RRC IEs. ◆ The information is indicated by MAC CE / DCI. ◆ The information is determined based on one or more UE capabilities. ◆ The information is described / defined in the specification. ◆ The information is based on conditions described / defined in the specification. ◆ The information is determined by a combination of several of the above methods. For example, the information is determined by the setting / indication of higher layer parameters / MAC CE / DCIs and reported by UE capabilities.

[0214] The above multiple embodiments / options / choices may be combined into a single embodiment / option / choice.

[0215] In the embodiments described above, the measured RS may be a QCL source RS in an active TCI state / indicated / unified TCI state.

[0216] (Note) The following inventions are added with respect to one embodiment of the present disclosure. [Note 1] A terminal having a receiving unit that receives one or more settings relating to sounding reference signal (SRS) antenna switching, and a control unit that controls the terminal to report the current state of SRS antenna switching among the SRS antenna switching set by the settings using an upper layer or a lower layer. [Note 2] The terminal according to Note 1, wherein when a change in the antenna switching pattern is experienced, the control unit is controlled to transmit a terminal assistance information message that includes parameters relating to the antenna switching pattern or parameters relating to the period. [Note 3] The terminal according to Note 1 or Note 2, wherein the control unit is controlled to report a field indicating the currently applied antenna switching pattern among the candidate SRS antenna switching states that are set, including it in the MAC control element (CE), uplink control information (UCI), or physical channel. [Note 4] The terminal according to any one of Notes 1 to 3, wherein the control unit controls the terminal to send a request for the desired SRS antenna switching state, and controls the terminal not to switch the SRS antenna switching state until it receives a response to the request.

[0217] (Wireless Communication System) The configuration of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any of the wireless communication methods according to the above embodiments of this disclosure, or a combination thereof.

[0218] Figure 4 shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 (which may also be simply called system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc., as specified by the Third Generation Partnership Project (3GPP).

[0219] Furthermore, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0220] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the Secondary Node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0221] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both MN and SN are NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0222] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) located within the macrocell C1 that form a small cell C2 that is narrower than the macrocell C1. User terminals 20 may be located within at least one cell. The arrangement, number, shape, size, etc., of each cell and user terminal 20 are not limited to the configuration shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

[0223] The wireless communication system 1 may utilize Multi Input Multi Output (MIMO). For example, one cell may be formed by one antenna / base station 10, or by multiple antennas / base stations 10. One [virtual] cell (which may be called a supercell, for example) may be composed of multiple [virtual] cells (which may be called subcells, for example). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell whose physical range fluctuates quasi-statically / dynamically. In this case, the wireless communication system 1 may be called a cell-free system.

[0224] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of Carrier Aggregation (CA) using multiple Component Carriers (CC) and Dual Connectivity (DC).

[0225] Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). A macrocell C1 may be included in FR1, and a small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz. Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be in a frequency band higher than FR2.

[0226] Furthermore, the user terminal 20 may communicate in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0227] Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 / Xn interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is the upstream station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which is the relay station, may be called an IAB node.

[0228] Base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0229] The core network 30 may include network functions (NF) such as User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Unified Data Management (UDM), Application Function (AF), Data Network (DN), Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Multiple functions may be provided by a single network node. Furthermore, communication with an external network (e.g., the Internet) may occur via the DN.

[0230] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0231] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access scheme may be used. For example, 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-OFDM), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0232] The wireless access method may also be called a waveform. In wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0233] In the wireless communication system 1, a Physical Downlink Shared Channel (PDSCH), a Broadcast Channel (PBCH), or a Physical Downlink Control Channel (PDCCH) may be used as the downlink channel, which is shared by each user terminal 20.

[0234] Furthermore, in the wireless communication system 1, the uplink channel may include a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), or the like, all of which are shared by each user terminal 20.

[0235] User data, higher-layer control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and higher-layer control information may also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) may be transmitted via PBCH.

[0236] Lower-layer control information may be transmitted by PDCCH. The lower-layer control information may include, for example, Downlink Control Information (DCI) which includes scheduling information for at least one of PDSCH and PUSCH.

[0237] Furthermore, the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. Furthermore, PDSCH may be read as DL data, and PUSCH may be read as UL data.

[0238] PDCCH detection may utilize a Control Resource Set (CORESET) and a search space. A CORESET corresponds to the resources used to search for DCIs. A search space corresponds to the search area and search method for PDCCH candidates. A single CORESET may be associated with one or more search spaces. A UE may monitor CORESETs associated with a given search space based on the search space configuration.

[0239] A single search space may correspond to one or more PDCCH candidates corresponding to aggregation levels. One or more search spaces may be referred to as a search space set. In this disclosure, "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," and "CORESET configuration" may be interpreted interchangeably.

[0240] PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgment information (for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). PRACH may transmit a random access preamble for establishing a connection with the cell.

[0241] In this disclosure, downlinks, uplinks, etc., may be expressed without the prefix "link." Also, the prefix "physical" may be omitted from the names of various channels.

[0242] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc., may be transmitted. In the wireless communication system 1, the DL-RS may include a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc.

[0243] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

[0244] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) may include a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. The DMRS may also be called a user-specific reference signal (UE-specific Reference Signal).

[0245] (Base Station) Figure 5 shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission line interface 140 may be provided.

[0246] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0247] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0248] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 120, transmitting / receiving antenna 130, and transmission path interface 140. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 120. The control unit 110 may also perform call processing of communication channels (setting, releasing, etc.), status management of the base station 10, management of wireless resources, etc.

[0249] The transmitting / receiving unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting / receiving unit 120 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0250] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 1211 and an RF unit 122. The receiving unit may consist of a receiving processing unit 1212, an RF unit 122 and a measuring unit 123.

[0251] The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0252] The transmitting / receiving unit 120 may transmit the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 may also receive the uplink channel, uplink reference signal, etc.

[0253] The transmitting / receiving unit 120 may use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like to form at least one of the transmitting beam and the receiving beam.

[0254] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform processing on data and control information acquired from the control unit 110, for example, at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), and the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), to generate a bit sequence to be transmitted.

[0255] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0256] The transmitting / receiving unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 130.

[0257] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0258] The transmitting / receiving unit 120 (receiving processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0259] The transmitting / receiving unit 120 (measurement unit 123) may perform measurements related to the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), reception quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0260] The transmission path interface 140 may send and receive signals (backhaul signaling) with devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0261] In this disclosure, the transmitting and receiving units of the base station 10 may consist of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0262] The base station 10 may be separated into three elements: a Radio Unit (RU), a Distributed Unit (DU), and a Central Unit (CU). For example, the RU may implement RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level physical layer functions (precoding, IFFT, FFT, etc.). The DU may implement higher-level physical layer functions (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may implement PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

[0263] In this disclosure, base station 10 may include a single device that implements all the functions of RU, DU, and CU, or it may include multiple devices that each implement some of the functions of RU, DU, and CU and are connected to each other. In this disclosure, base station 10 may be interpreted as RU / DU / CU.

[0264] The transmitting / receiving unit 120 may transmit one or more settings related to sounding reference signal (SRS) antenna switching. The control unit 110 may control the terminal to receive the current state of the SRS antenna switching applied by the terminal from the terminal using a higher or lower layer, based on the SRS antenna switching set by the above settings.

[0265] (User Terminal) Figure 6 shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that one or more of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0266] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0267] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0268] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 220 and the transmitting / receiving antenna 230. The control unit 210 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 220.

[0269] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0270] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may consist of a receiving processing unit 2212, an RF unit 222 and a measuring unit 223.

[0271] The transmitting and receiving antenna 230 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0272] The transmitting / receiving unit 220 may receive the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 220 may also transmit the uplink channel, uplink reference signal, etc.

[0273] The transmitting / receiving unit 220 may use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like to form at least one of the transmitting beam and the receiving beam.

[0274] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc., on data and control information acquired from the control unit 210 to generate a bit sequence to be transmitted.

[0275] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0276] Whether or not to apply DFT processing may be based on the transform precoding settings. The transmitting / receiving unit 220 (transmission processing unit 2211) may perform DFT processing as part of the transmission process to transmit a channel (for example, PUSCH) using a DFT-s-OFDM waveform if transform precoding is enabled for that channel, or it may not perform DFT processing as part of the transmission process if transform precoding is not enabled for that channel.

[0277] The transmitting / receiving unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 230.

[0278] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0279] The transmitting / receiving unit 220 (receiving processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0280] The transmitting / receiving unit 220 (measuring unit 223) may perform measurements related to the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, 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 be output to the control unit 210.

[0281] The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources may be, for example, Non Zero Power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources may be at least one of the following: NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. CSI-IM may also be called CSI-Interference Management (IM), and may be interpreted interchangeably with Zero Power (ZP) CSI-RS. In this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., may be interpreted interchangeably.

[0282] In this disclosure, the transmitting unit and receiving unit of the user terminal 20 may be composed of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0283] The control unit 210 may perform at least a part of the processing of the control unit as described above.

[0284] The transmitting / receiving unit 220 may perform at least a part of the processing of the transmitting / receiving unit as described above.

[0285] (Hardware Configuration) The block diagram used in the description of the above embodiment shows functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may also be realized by combining the above one device or the above multiple devices with software.

[0286] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission may be called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0287] For example, a base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 7 is a diagram showing an example of the hardware configuration of a base station and user terminal according to one embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0288] In this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0289] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, the processing may be performed by one processor, or it may be performed by two or more processors simultaneously, sequentially, or by other means. Note that the processor 1001 may be implemented using one or more chips.

[0290] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations and control communication via the communication device 1004, or control at least one of reading and writing data in the memory 1002 and storage 1003.

[0291] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, at least a part of the control unit 110 (210) and the transmitting / receiving unit 120 (220) described above may be implemented by the processor 1001.

[0292] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly.

[0293] The memory 1002 is a computer-readable recording medium and may consist of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be called a register, cache, or main memory. The memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of the present disclosure.

[0294] The storage 1003 is a computer-readable recording medium and may consist of at least one of the following: a flexible disk, a floppy disk, a magneto-optical disk (e.g., a Compact Disk (Compact Disc ROM (CD-ROM)), a Digital Use Disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. The storage 1003 may also be called an auxiliary storage device.

[0295] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitting / receiving unit 120 (220), transmitting / receiving antenna 130 (230), etc., may be implemented by the communication device 1004. The transmitting / receiving unit 120 (220) may be implemented with physically or logically separated transmitting unit 120a (220a) and receiving unit 120b (220b).

[0296] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0297] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0298] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of each functional block may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0299] Furthermore, devices included in the core network 30 (for example, network nodes that provide NF) may also be implemented using the functional block / hardware configuration described above.

[0300] (Variations) Terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal (signal or signaling) may be used interchangeably. Also, a signal may be a message. A reference signal may be abbreviated as RS and may be called a pilot, pilot signal, etc., depending on the applicable standard. Also, a component carrier (CC) may be called a cell, frequency carrier, carrier frequency, etc.

[0301] A wireless frame may consist of one or more periods (frames) in the time domain. Each of these periods (frames) constituting a wireless frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0302] Here, the neurology may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neurology may be, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0303] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). Alternatively, a slot may be a time unit based on neurology.

[0304] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using minislots may be called a PDSCH (PUSCH) mapping type B.

[0305] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Wireless frames, subframes, slots, minislots, and symbols may each be referred to by different names. Furthermore, the units of time such as frames, subframes, slots, minislots, and symbols in this disclosure may be interpreted as interchangeable.

[0306] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, and one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe in existing LTE (1 ms), a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing a TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0307] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0308] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the actual time interval (e.g., number of symbols) in which the transport block, code block, code word, etc. are mapped may be shorter than the TTI.

[0309] Furthermore, if one slot or one mini-slot is referred to as a TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit for scheduling. In addition, the number of slots (number of mini-slots) that constitute this minimum time unit for scheduling may be controlled.

[0310] A TTI with a time length of 1 ms may be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0311] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0312] A Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0313] Furthermore, an RB may contain one or more symbols in the time domain and may have the length of one slot, one minislot, one subframe, or one TTI. Each TTI, subframe, etc., may consist of one or more resource blocks.

[0314] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0315] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0316] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. The PRBs may be defined and numbered within a given BWP.

[0317] A BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or more BWPs may be configured within a single carrier for a UE.

[0318] At least one of the configured BWPs may be active, and the UE does not need to assume that it will transmit or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0319] The structures of wireless frames, subframes, slots, minislots, and symbols described above are merely examples. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within the TTI can be varied in various ways.

[0320] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or corresponding other information. For example, wireless resources may be indicated by a predetermined index.

[0321] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements using these parameters may differ from those expressly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0322] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0323] Furthermore, information, signals, etc., can be output from upper layers to lower layers and from lower layers to upper layers, or to at least one of the two. Information, signals, etc., may also be input and output via multiple network nodes.

[0324] Input and output information and signals may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals may be overwritten, updated, or appended to. Output information and signals may be deleted. Input information and signals may be transmitted to other devices.

[0325] Any information described in this disclosure (e.g., variables, constants, parameters) may be communicated from any first device (e.g., UE / base station) to any second device (e.g., base station / UE) that indicates / specifies (or relates to) the value of such any information, even if not specifically stated in the embodiments described above.

[0326] Information notification is not limited to the embodiments described herein and may be carried out by other means. For example, information notification in this disclosure may be carried out by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0327] Physical layer signaling may also be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. RRC signaling may also be called RRC messages, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. MAC signaling may also be communicated using, for example, MAC Control Elements (CEs).

[0328] Furthermore, notification of the specified information (for example, notification that "X is the case") is not limited to explicit notification, but may also be made implicitly (for example, by not notifying the specified information or by notifying other information).

[0329] The determination may be made by a value represented by one bit (0 or 1), by a boolean value represented as true or false, or by a numerical comparison (for example, a comparison with a predetermined value).

[0330] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0331] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0332] The terms “system” and “network” as used in this disclosure may be used interchangeably. “Network” may also mean the equipment included in the network (e.g., base stations).

[0333] In this disclosure, terms such as “precoding,” “precoder,” “weight (precoding weight),” “quasi-co-location (QCL),” “transmission configuration indication state (TCI state),” “spatial relation,” “spatial domain filter,” “transmit power,” “phase rotation,” “antenna port,” “layer,” “number of layers,” “rank,” “resource,” “resource set,” “beam,” “beam width,” “beam angle,” “antenna,” “antenna element,” “panel,” “UE panel,” “transmitting entity,” and “receiving entity” may be used interchangeably.

[0334] In this disclosure, "antenna port" may be interpreted interchangeably with "antenna port for any signal / channel" (e.g., a Demodulation Reference Signal (DMRS) port). In this disclosure, "resource" may be interpreted interchangeably with "resource for any signal / channel" (e.g., a reference signal resource, an SRS resource, etc.). Resources may include time / frequency / code / spatial / power resources. Furthermore, a spatial domain transmit filter may include at least one of a spatial domain transmit filter and a spatial domain receive filter.

[0335] The above group may include, for example, at least one of the following: a spatial relationship group, a code division multiplexing (CDM) group, a reference signal (RS) group, a control resource set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, or a panel group.

[0336] Furthermore, in this disclosure, terms such as beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), and RS may be interpreted interchangeably.

[0337] Furthermore, in this disclosure, TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc., may be interpreted interchangeably.

[0338] Furthermore, in this disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) properties," and "specific QCL type (e.g., Type A, Type D)" may be interpreted interchangeably.

[0339] In this disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, subset may be interpreted interchangeably.

[0340] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interpreted as mutually exclusive. "Spatial relationship information (TCI state)" may be interpreted as mutually exclusive as "a set of spatial relationship information (TCI state)," "one or more pieces of spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive. Spatial relationship information and spatial relationship may be interpreted as mutually exclusive.

[0341] In this 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” may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0342] A base station may house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station may be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0343] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform a control / operation based on said information.

[0344] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0345] A mobile station may also be called a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.

[0346] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a moving object, the moving object itself, etc.

[0347] The term "mobile object" refers to any movable object, regardless of its speed, and naturally includes cases where the mobile object is stationary. Examples of such mobile objects include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and items carried on them. Furthermore, such mobile objects may be autonomously driven objects operating based on operational commands.

[0348] The mobile entity may be a vehicle (e.g., a car, an airplane), an unmanned mobile entity (e.g., a drone, an autonomous vehicle), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0349] Figure 8 shows an example of a vehicle according to one 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, a pneumatic 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.

[0350] The drive unit 41 consists of, for example, at least one of an engine, a motor, or an engine-motor hybrid. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0351] The electronic control unit 49 consists of a microprocessor 61, memory (ROM, RAM) 62, and communication ports (e.g., input / output (IO) ports) 63. Signals from various sensors 50-58 installed in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0352] Signals from various sensors 50-58 include current signals from current sensor 50 for sensing motor current, rotational speed signals of front wheels 46 / rear wheels 47 acquired by rotational speed sensor 51, air pressure signals of front wheels 46 / rear wheels 47 acquired by air pressure sensor 52, vehicle speed signals acquired by vehicle speed sensor 53, acceleration signals acquired by acceleration sensor 54, accelerator pedal depression amount signals acquired by accelerator pedal sensor 55, brake pedal depression amount signals acquired by brake pedal sensor 56, operation signals of shift lever 45 acquired by shift lever sensor 57, and detection signals acquired by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[0353] The information service unit 59 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, display, television, and radio, and one or more ECUs that control these devices. The information service unit 59 uses information acquired from external devices via a communication module 60 or the like to provide various types of information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0354] The information service unit 59 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) or output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0355] The driver assistance system unit 64 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Unit (IMU), Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driver assistance functions or autonomous driving functions.

[0356] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) via the communication port 63 to the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 provided in the vehicle 40.

[0357] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Alternatively, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 (it may function as at least one of the base station 10 and the user terminal 20).

[0358] The communication module 60 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include the information based on the above input.

[0359] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 59 installed in the vehicle. The information service unit 59 may also be called an output unit, which outputs information (for example, it outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 60).

[0360] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, various sensors 50-58, etc., which are provided in the vehicle 40.

[0361] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may have the functions of the base station 10 described above. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, uplink channel, downlink channel, etc., may be interpreted as sidelink channel.

[0362] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station 10 may be configured to have the same functions as the user terminal 20 described above.

[0363] In this disclosure, operations performed by a base station may, in some cases, be performed by its upper node. In a network including one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0364] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between as needed during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described in this disclosure may be rearranged in order, provided they are consistent. For example, the methods described in this disclosure present various step elements using exemplary order and are not limited to the specific order presented.

[0365] Each aspect / embodiment described in this disclosure is 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 (where x is, for example, an integer or 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®), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), IEEE 802.20, systems utilizing Ultra-WideBand (UWB), Bluetooth®, or other appropriate wireless communication methods, and next-generation systems extended, modified, created, or defined based thereon may also be applied. Furthermore, multiple systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

[0366] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0367] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, the references to the first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.

[0368] The term “determining” as used in this disclosure may encompass a wide variety of actions. For example, “determining” may be considered to mean judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in tables, databases, or other data structures), ascertaining, etc.

[0369] Furthermore, "judgment (decision)" may be considered as "judging (deciding)" things like receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory).

[0370] Furthermore, “judgment (decision)” may be considered as “judgment (decision)” of resolving, selecting, choosing, establishing, comparing, etc. In other words, “judgment (decision)” may be considered as “judgment (decision)” of some action. In this disclosure, “judgment (decision)” may be interpreted as mutually interchangeable with the actions described above.

[0371] Furthermore, in this disclosure, “determine / determining” may be interpreted as “assume / assuming,” “expect / expecting,” or “consider / considering.” In addition, in this disclosure, “not expecting to do…” may be interpreted as “expecting not to do….”

[0372] In this disclosure, "expect" may be rephrased as "be expected." For example, "expect(s) ..." (where "..." may be expressed as a that clause, an infinitive, etc.) may be rephrased as "be expected ..." or "do (the verb without "to" if "..." is an infinitive)." Similarly, "does not expect ..." may be rephrased as "be not expected ..." or "do not (the verb without "to" if "..." is an infinitive)." Furthermore, "An apparatus A is not expected ..." may be rephrased as "An apparatus B other than apparatus A does not expect ... from apparatus A" (for example, if apparatus A is a UE, apparatus B may be a base station).

[0373] The term "maximum transmit power" as used in this disclosure may mean the maximum transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0374] As used in this disclosure, the terms “connected,” “coupled,” and any variations thereof mean any direct or indirect connection or coupling between two or more elements, and may include one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be replaced with “access.”

[0375] In this disclosure, when two elements are connected, they can be considered to be "connected" or "coupled" to each other using one or more wires, cables, printed electrical connections, etc., and, in some non-exclusive and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0376] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0377] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0378] In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0379] In this disclosure, "less than or equal to," "less than," "greater than or equal to," "more than," and "equal to" may be interpreted interchangeably. In addition, in this disclosure, words meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees. In addition, in this disclosure, words meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees, by adding "i-th" (where i is any integer) to the expression (for example, "highest" may be interpreted interchangeably with "i-th highest").

[0380] In this disclosure, "of," "for," "regarding," "related to," and "associated with" may be interpreted as being interchangeable.

[0381] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "B in response to A", "B based on A", "B during / while A", "B before A", "B at (the same time as) / on A", "B after A", "B since A", and "B until A" may be interchangeable. Furthermore, A, B, etc., may be replaced with appropriate expressions such as nouns, gerunds, or regular sentences depending on the context. The time difference between A and B may be approximately zero (immediately after or immediately before). Additionally, a time offset may be applied to the time when A occurs. For example, "A" may be interpreted as "before / after the time offset when A occurs". The time offset (e.g., one or more symbols / slots) may be predetermined or determined by the UE based on notified information.

[0382] In this disclosure, timing, time, duration, time instance, any unit of time (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc., may be interpreted interchangeably.

[0383] Although the invention described herein has been explained in detail above, it will be clear to those skilled in the art that the invention described herein is not limited to the embodiments described herein. The descriptions herein are illustrative and not intended to be restrictive in any way to the invention described herein.

[0384] This application is based on Japanese Patent Application No. 2025-052000, filed on March 26, 2025. All of its contents are included herein.

Claims

1. A terminal comprising: a receiving unit that receives one or more settings related to sounding reference signal (SRS) antenna switching; and a control unit that controls the terminal to report the current state of the SRS antenna switching among the SRS antenna switching set by the said settings using a higher layer or a lower layer.

2. The terminal according to claim 1, wherein, when the antenna switching pattern is changed, the control unit is controlled to transmit a terminal assistance information message that includes parameters related to the antenna switching pattern or parameters related to the period.

3. The terminal according to claim 1, wherein the control unit controls the MAC control element (CE), uplink control information (UCI), or physical channel to report a field indicating the currently applied antenna switching pattern from among the candidates for the set SRS antenna switching state.

4. The terminal according to claim 1, wherein the control unit controls the terminal to send a request for the desired SRS antenna switching state, and controls the terminal not to switch the SRS antenna switching state until it receives a response to the request.

5. A wireless communication method for a terminal, comprising the steps of: receiving one or more settings relating to sounding reference signal (SRS) antenna switching; and controlling the terminal to report the current state of the SRS antenna switching among the SRS antenna switching set by the settings using a higher layer or a lower layer.

6. A base station comprising: a transmitting unit that transmits one or more settings related to sounding reference signal (SRS) antenna switching; and a control unit that controls the receiving of the current SRS antenna switching state applied by the terminal from the terminal using a higher or lower layer, based on the SRS antenna switching set by the settings.

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