Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure has: a reception unit that receives information indicating a first number and a second number related to the transmission of a sounding reference signal (SRS), and an offset per port used to transmit the SRS; and a control unit that uses the offset per port to control the transmission of the SRS in a resource block (RB) of the second number per each RB of the first number. According to one aspect of the present disclosure, it is possible to appropriately transmit an SRS that uses a frequency domain portion.

Description

[Technical Field]

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

[0002] Long Term Evolution (LTE) was specified for Universal Mobile Telecommunications System (UMTS) networks with the aim of achieving even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel.10-14) was specified for the aim of further increasing 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, etc.) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In future wireless communication systems (e.g., NR), the expansion of the Sounding Reference Signal (SRS) is being considered.

[0006] However, in the extension of SRS, the details of how SRS resources are configured for SRS transmissions using certain frequency domains are unclear at least at the resource block (RB) level and the subcarrier level. This could lead to a degradation of communication quality, communication throughput, and other factors.

[0007] Therefore, one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately transmit SRS using a certain frequency range. [Means for solving the problem]

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives information indicating a first number, a second number, and an offset for each port used to transmit a measurement reference signal (SRS), and a control unit that uses the offset for each port to control the transmission of the SRS in the second number of resource blocks (RBs) for each first number of resource blocks (RBs). [Effects of the Invention]

[0009] According to one aspect of this disclosure, SRS can be appropriately transmitted using a specific frequency range. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 shows an example of SRS bandwidth configuration. [Figure 2] Figure 2 shows an example of the bandwidth for SRS frequency hopping. [Figure 3] Figure 3 shows an example of SRS frequency hopping. [Figure 4] Figures 4A and 4B show another example of SRS frequency hopping. [Figure 5] Figure 5 shows an example of an RPFS SRS. [Figure 6] Figure 6 shows an example of SRS resource mapping in KTC={2,4,8}. [Figure 7] Figure 7 shows the maximum cyclic shift count in Rel.17. [Figure 8] Figure 8 shows an example where different SRS ports share different subcarriers. [Figure 9] Figure 9 shows the table representing koffset l in Rel.17 and the corresponding SRS arrangement. [Figure 10] Figure 10 shows the arrangement of the SRS at a predetermined starting position. k0 (Pi) is the frequency starting position (starting position in the frequency direction). [Figure 11] Figure 11 shows an example of the SRS configuration when X=1, N=2, and KTC=2. [Figure 12] Figure 12 shows an example of SRS arrangement when KTC is 12, 16, and 24. [Figure 13] Figure 13 shows an example of an offset (koffset l') corresponding to each transmission comb count KTC of 12 or more. [Figure 14] Figure 14 shows the arrangement of M RBs in (X=1, N=2), (X=1, N=4), or (X=1, N=8). [Figure 15] Figure 15 shows the arrangement of M RBs in (X=2, N=4), (X=2, N=8), or (X=4, N=8). [Figure 16] Figure 16A shows an example of SRS configuration in Option 2-1-1. Figure 16B shows an example of SRS configuration in Option 2-1-2. [Figure 17] Figure 17 shows a specific example of option 2-2-1. [Figure 18]Figure 18A shows an example of option 2-5-1. Figure 18B shows an example of option 2-5-2. [Figure 19] Figure 19 shows an example of an offset in embodiment 2-6. [Figure 20] Figures 20A and 20B show examples of SRS configurations for option 2-6-1. [Figure 21] Figures 21A and 21B show examples of SRS configurations for option 2-6-2. [Figure 22] Figure 22 shows an example of an offset in embodiment 2-7. [Figure 23] Figures 23A and 23B show examples of SRS configurations for option 2-7-1. [Figure 24] Figures 24A and 24B show examples of SRS configurations for option 2-7-2. [Figure 25] Figure 25 shows an example of an offset in embodiment 2-8. [Figure 26] Figure 26A shows an example of the SRS configuration for option 2-8-1. Figure 26B shows an example of the SRS configuration for option 2-8-2. [Figure 27] Figures 27A and 27B show other examples of SRS configuration for option 2-8-2. [Figure 28] Figure 28 shows an example of an offset in embodiment 2-9. [Figure 29] Figure 29A shows an example of SRS configuration for option 2-9-1. Figure 29B shows an example of SRS configuration for option 2-9-2. [Figure 30] Figures 30A and 30B show other examples of SRS configuration for option 2-9-2. [Figure 31] Figure 31 shows an example in which a modified version of the first embodiment is applied. [Figure 32] Figure 32 shows an example in which a modified version of the second embodiment is applied. [Figure 33]Figure 33 shows an example in which the first and second embodiments are used in combination and further modified. [Figure 34] Figure 34 shows an example of a schematic configuration of a wireless communication system according to one embodiment. [Figure 35] Figure 35 shows an example of the configuration of a base station according to one embodiment. [Figure 36] Figure 36 shows an example of the configuration of a user terminal according to one embodiment. [Figure 37] Figure 37 shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. [Figure 38] Figure 38 shows an example of a vehicle according to one embodiment. [Modes for carrying out the invention]

[0011] (SRS) In NR, the Sounding Reference Signal (SRS) has a wide range of applications. NR's SRS is used not only for uplink (UL) CSI measurement, as was done in existing LTE (LTE Rel. 8-14), but also for downlink (DL) CSI measurement and beam management. SRS may also be used for positioning.

[0012] A UE may configure one or more SRS resources. SRS resources may be identified by an SRS Resource Index (SRI).

[0013] 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.

[0014] A UE may configure one or more SRS resource sets. A single SRS resource set may be associated with a predetermined number of SRS resources. The UE may use common upper-layer parameters with respect to the SRS resources included in a single SRS resource set. In this disclosure, the term "resource set" may be interpreted as "set," "resource group," "group," etc.

[0015] Information regarding SRS resources or resource sets may be set in the UE using upper-layer signaling, physical layer signaling (e.g., Downlink Control Information (DCI)), or a combination thereof.

[0016] SRS configuration information (for example, the "SRS-Config" element of the RRC information element) may include SRS resource set configuration information, SRS resource configuration information, and so on.

[0017] The SRS resource set configuration information (for example, the RRC parameter "SRS-ResourceSet") may include the SRS resource set ID (Identifier) ​​(SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, the SRS resource type, and information on the SRS usage.

[0018] Here, the SRS resource type may be one of the following: Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), or Aperiodic SRS (A-SRS). The UE may send P-SRS and SP-SRS periodically (or periodically after activation). The UE may send A-SRS based on DCI's SRS request.

[0019] Furthermore, the uses of SRS (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may include, for example, beam management, codebook, non-codebook, and antenna switching. SRS for codebook or non-codebook applications may be used to determine the precoder for SRI-based codebook-based or non-codebook-based uplink shared channel (PUSCH) transmissions.

[0020] For beam management applications, it may be assumed that only one SRS resource per SRS resource set is available for transmission at any given instant. However, if multiple SRS resources belong to different SRS resource sets, these SRS resources may be transmitted simultaneously.

[0021] SRS resource configuration information (e.g., the RRC parameter "SRS-Resource") may include information such as the SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmit comb (comb), SRS resource mapping (e.g., time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping, SRS resource type, sequence ID, and spatial relationships.

[0022] The UE may transmit SRS on adjacent symbols equal to the number of SRS symbols among the last six symbols in a slot. The number of SRS symbols may be 1, 2, 4, etc.

[0023] The UE may switch the Bandwidth Part (BWP) that transmits SRS for each slot, or it may switch the antenna. The UE may also apply at least one of intra-slot hopping and inter-slot hopping to SRS transmission.

[0024] The multiplicity in the frequency direction is 12 when using cyclic shift, and may be 4 when using a comb.

[0025] (SRS Bandwidth Setting) In the Rel.16 specification, the SRS bandwidth is defined. C SRS ∈ {0, …, 63} (setting index, row index) and B SRS ∈ {0, 1, 2, 3} (number of boundaries of band division) are set using upper layer signaling, and the SRS bandwidth is determined using the table (association, mapping) in FIG. 1.

[0026] As in the example of FIG. 2, B SRS is used to divide the available bandwidth into several parts. The multiple parts are used for SRS hopping. C SRS sets a set of SRS bands. B SRS selects one bandwidth from the set of settings. This example shows the case where C SRS = 13. All candidate values of the SRS bandwidth m SRS,b (number of RBs) are multiples of 4. m SRS,b is the number of RBs occupied by the SRS resource in one OFDM symbol. B SRS The larger B is, the more frequency partitions there are (the size of the frequency partition is smaller).

[0027] Parameter b hop ∈ {0, 1, 2, 3} is set for SRS frequency hopping. b hop <B SRS When this is the case, SRS frequency hopping is enabled. As shown in the example of FIG. 3, among the bands given to SRS frequency hopping (hopping bands), SRS is transmitted using the SRS band.

[0028] Describe the SRS transmission count. n SRSThis is a counter for the number of SRS transmissions. For each SRS transmission, there are R adjacent symbols of the SRS resource within one slot. In the case of aperiodic SRS (A-SRS), n SRS =[l' / R]. Here, l' represents the symbol position, and R represents the repetition factor set by RRC. In the case of periodic / semi-permanent SRS (P-SRS / SP-SRS), T represents the period. SRS and T representing slot offset offset Using this, the following equation (1) is applied.

[0029]

number

[0030] Figure 4A is C SRS =24, b hop =0, B SRS =2, N symb SRS An example of SRS frequency hopping when = 4 is shown. Within the bandwidth (hopping bandwidth) given to SRS frequency hopping, the SRS bandwidth m SRS,b An SRS with 24 RBs (in this example) is transmitted. When SRS frequency hopping is applied, different SRS resources occupy different frequencies (bandwidth, RB). Figure 4B shows an example of SRS frequency hopping with a repetition coefficient R of 2.

[0031] Resource block (RB)-level partial frequency sounding (RPFS) using SRS is being investigated. The parameter used in RPFS is FreqScalingFactor(P F ) may be set to UE by higher-layer signaling.

[0032] Figure 5 shows the settings in addition to those in Figure 4, P F An example of RPFS SRS frequency hopping when = 2 is shown. At each hop, 1 / P of the available bandwidthF SRS transmission may be performed over a bandwidth of (12 RBs in this example). The number of RBs occupied by the OFDM symbol in the SRS resource is m SRS,b / P F This is the result.

[0033] In Rel.15 / 16 / 17(NR), UE is K as the RRC parameter. TC This is set. Number of transmit combs K TC For example, {2,4,8}. Figure 6 shows K TC This figure shows an example of SRS resource mapping in {2,4,8}. As shown in Figure 6, the SRS resources are K TC Each subcarrier occupies one subcarrier.

[0034] In Rel.15 / 16 / 17, K TC Maximum cyclic shift count n per value SRS cs,max This is pre-set. Figure 7 shows the maximum number of cyclic shifts in Rel.17.

[0035] In Rel.15 / 16 / 17, under certain conditions, different SRS ports may occupy different subcarriers (resulting in different transmit combs). TC Pi This is used to determine the starting frequency position (subcarrier), and in Rel. 17, it is expressed as equation (2). N ap SRS This is the number of ports used for SRS transmission.

[0036]

number

[0037] Figure 8 shows an example where different SRS ports share different subcarriers. According to equation (2), under certain conditions, as shown in Figure 8, the SRS transmitted on ports 1000 and 1002 occupies different subcarriers than the SRS transmitted on ports 1001 and 1003.

[0038] In Rel.16 / 17, SRS occupies resources in different frequency domains (different subcarriers / different combs) at different symbols. Offset k offset l This is used to determine the starting frequency position.

[0039] Figure 9 shows k in Rel.17 offset l This figure shows a table and the corresponding SRS arrangement. As shown in the table in Figure 9, k offset l is, K TC It is pre-set for each value. Also, below the table, K TC For each value, and the symbol number (N) where the SRS is located. symb SRS Each section shows the placement of the SRS.

[0040] In Rel.15 / 16 / 17, the sequence of SRS mapped to the resource element (k,l) is expressed as shown in equation (3). SC,b SRS In Rel. 15 / 16, it is expressed as equation (4), and in Rel. 17, it is expressed as equation (5).

[0041]

number

[0042]

number

[0043]

number

[0044] Figure 10 shows the arrangement of the SRS at a predetermined starting position. (Pi) This is the frequency start position (start position in the frequency direction). The number of resource blocks (RBs) is PF If not set SRS,b P F If this is set SRS,b / P F In Figure 10, K TC This example shows a case where SRS is located in one subcarrier for every two subcarriers in each RB.

[0045] When RPFS SRS is applied, the available transmit power can be allocated to smaller bandwidth segments compared to full-band sounding, thus increasing the power per subcarrier. Furthermore, SRS capacity can be expanded by giving the network the opportunity to multiplex more UE ports on the remaining frequency resources. Wideband sounding can be achieved with fewer attempts compared to when narrowband is allocated by existing (Rel.16) SRS transmissions.

[0046] For example, by using AI, it becomes possible to transmit SRS on a portion of the RB in a certain bandwidth and estimate the CSI across the entire bandwidth. This allows for lower RS ​​overhead.

[0047] However, in the extension of SRS, the details of how SRS resources are configured for SRS transmissions using certain frequency domains (i.e., discontinuous SRS transmissions in the frequency direction) at at least one of the resource block (RB) level or subcarrier level are unclear. In this case, there is a risk of degradation in communication quality, communication throughput, etc.

[0048] Therefore, the inventors conceived a method for appropriately transmitting SRS using a specific frequency range.

[0049] 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.

[0050] 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".

[0051] In this disclosure, terms such as activate, deactivate, indicate, select, configure, update, and determine may be interpreted interchangeably. In this disclosure, terms such as support, control, controllable, operate, and operable may be interpreted interchangeably.

[0052] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, information elements (IE), settings, etc., may be interpreted interchangeably. In this disclosure, Medium Access Control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc., may be interpreted interchangeably.

[0053] In this disclosure, the upper-layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0054] 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).

[0055] In this disclosure, physical layer signaling may include, for example, Downlink Control Information (DCI) and Uplink Control Information (UCI).

[0056] 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, and subset may be interpreted interchangeably.

[0057] In this disclosure, partial frequency sounding (PFS), RB-level partial frequency sounding (RPFS), novel SRS, and SRS Rel.17 and later may be interpreted interchangeably.

[0058] In this disclosure, “SRS occupies A,” “SRS is placed / mapped to A,” and “UE transmits SRS in A” may be interpreted as one another. A may be, for example, an RB, RE, a specific frequency domain (e.g., a subcarrier), a specific time domain (e.g., a symbol), etc. RB, subcarrier, subcarrier group, and specific frequency domain may be interpreted as one another. Radio frame, subframe, slot, minislot, symbol, and specific time domain may be interpreted as one another.

[0059] In this disclosure, the notation "Rel.XX" refers to a 3GPP release. However, the release number "XX" is an example and may be replaced with other numbers.

[0060] (Wireless communication method) In the following first embodiment, the framework of Rel.15 / 16 / 17 is reused, and the number of transmitted combs (K TC An example of increasing the number of RBs is explained. In the second embodiment, a transmit comb is introduced at the RB level. That is, the SRS occupies X RBs for every N RBs.

[0061] Furthermore, by applying the example of the second embodiment, it is also conceivable to transmit SRS on some subcarriers. Figure 11 shows X=1, N=2, K TC This figure shows an example of SRS arrangement when =2. In Figure 11, SRS is placed every 2RBs. Also, one SRS is placed for every 2 subcarriers in each RB. TC As shown in the first embodiment described later, K TC It may also be 12, in which case one SRS is placed for every 12 subcarriers.

[0062] <First Embodiment> UE is the third number (number of transmitting combs K) TC ) may control the transmission of SRS on one subcarrier for each subcarrier. For example, the UE has 12 or more transmit combs K TCThe setting may be configured, and SRS may be transmitted on each subcarrier for each transmitted comb. In other words, as shown in Figure 9, the number of transmitted combs up to the conventional Rel.17 K TC The number of transmit combs was 2, 4, or 8, but may be extended to 12 or more. Number of transmit combs K TC This could be, for example, 12, 16, 24, 36, 48, or any other integer. Figure 12 shows K TC This figure shows an example of SRS configuration when the values ​​are 12, 16, and 24.

[0063] Number of transmitting combs (K) of 12 or more TC The maximum number of cyclic shifts may be set in advance for each. For example, K TC If the values ​​are 12, 16, 24, 36, or 48, the maximum number of cycle shifts may be 6.

[0064] Number of transmitting combs (K) of 12 or more TC For each OFDM symbol l', the frequency domain offset (k offset l' The (transmitting comb offset) may be set in advance. Number of transmitting combs K TC For each value, a new candidate value for the offset is set. For example, the candidate values ​​for the transmit comb offset are {0,1,…,K TC It may also be -1. Alternatively, the candidate values ​​for the transmit comb offset are {0,1,…,K TC A subset of {-1} (for example, {0, 2, 4, ..., K}) TC -1) is also acceptable.

[0065] Figure 13 shows the number of transmitting combs K of 12 or more. TC Each corresponding offset (k offset l' This is an example of K. TC The examples of =2,4,8 are similar to those in Figure 9, and K TC Examples for =12,24,X have been added. SRS resources occupy different subcarriers in different symbols or different groups of symbols. And all subcarriers occupied between SRS symbols are in the frequency domain (K TC It is distributed equally among the subcarriers.

[0066] In Figure 13, X is any integer. Note that K TC Two offset patterns are shown for the case where =X, but either one may be defined. Or, K TC In the case of =X, one of the two offset patterns may be set in the UE by upper layer signaling / physical layer signaling. Note that below the table, K TC The SRS configuration for the case where =12 is illustrated.

[0067] The first embodiment may be supported for at least one of P-SRS, SP-SRS, and A-SRS. The first embodiment may be supported only for SRSs that use at least one of codebook, non-codebook, beam management, and antenna switching. The first embodiment may or may not be supported for positioning SRS.

[0068] According to the first embodiment, the number of transmitting combs K TC By setting a larger value, the number of SRS units can be reduced, resulting in less RS overhead.

[0069] <Second Embodiment> The UE receives a setting for the RB unit to place the SRS and, based on that setting, transmits an RB in at least one of the multiple RBs. In other words, the UE receives information indicating a first number (N) and a second number (X) of SRS transmissions, and controls the transmission of SRS in the second number of RBs for each first number.

[0070] The UE transmits (is configured to transmit) SRS in X RBs for every N RBs within the bandwidth (M RBs) set for the SRS resource in an OFDM symbol. N and X may be set by upper-layer signaling / physical-layer signaling, or fixed values ​​may be defined in advance. The following example uses RRC parameters, but these may be replaced with other directives (MAC CE, DCI, etc.).

[0071] Furthermore, instead of setting separate RRC parameters for X and N, a single RRC parameter may be set. For example, each candidate value of the RRC parameter may represent a pattern (a combination of X and N values).

[0072] For example, when setting the SRS density using the RRC parameter, the candidate values ​​for the RRC parameter may be 1 / 2, 1 / 4, etc. If the candidate value is 1 / 2, the patterns (combinations) (X=1, N=2), (X=2, N=4), or (X=4, N=8) may be shown. If the candidate value is 1 / 4, the combinations (X=1, N=4), or (X=2, N=8) may be shown.

[0073] For example, a pattern index may be set using the RRC parameter. For instance, candidate values ​​for the RRC parameter could be {Pattern 1, Pattern 2, etc.}, where Pattern 1 represents the patterns (combinations) (X=1, N=2), (X=2, N=4), or (X=4, N=8), and Pattern 2 could refer to the patterns (combinations) (X=1, N=4) or (X=2, N=8).

[0074] Candidate values ​​for N may be, for example, 2, 4, or 8, but other integers may also be set. A default value for N (for example, 1) may be defined. That is, if N is not set, the UE may decide that the default value for N will be applied. Note that if N=1, it means that SRS will be transmitted at all RBs.

[0075] The candidate values of X may be, for example, 1, 2, 3, 4, 5, 6, 7, 8, etc., but other integers may also be set. For each value of N and X, the relationship X < N may hold. A default value of N (for example, 1 or N) may be defined. That is, if N is not set, the UE may determine that the default value is applied to N. It may also be possible to set X = N. In this case, it means that the UE transmits SRS in all RBs.

[0076] (X,N) candidate combinations may be, for example, (1,2), (1,4), (1,8), (2,4), (2,8), (3,4), (3,8), (4,8), (5,8), (6,8), (7,8). The candidate combinations may have the relationship X < N. A default value of (X,N) (for example, X = 1, N = 1) may be defined. That is, if N is not set, the UE determines that the default value is applied to (X,N). It may also be possible to set X = N. In this case, it means that the UE transmits SRS in all RBs.

[0077] FIG. 14 is a diagram showing the arrangement of M RBs in (X = 1, N = 2), (X = 1, N = 4), or (X = 1, N = 8). In the case of (X = 1, N = 2), SRS is arranged in one RB for every two RBs. In the case of (X = 1, N = 4), SRS is arranged in one RB for every four RBs. In the case of (X = 1, N = 8), SRS is arranged in one RB for every eight RBs.

[0078] FIG. 15 is a diagram showing the arrangement of M RBs in (X = 2, N = 4), (X = 2, N = 8), or (X = 4, N = 8). In the case of (X = 2, N = 4), SRS is arranged in two RBs for every four RBs. In the case of (X = 2, N = 8), SRS is arranged in two RBs for every eight RBs. In the case of (X = 4, N = 8), SRS is arranged in four RBs for every eight RBs.

[0079] In the example of FIG. 15, when there are multiple Xs, the SRS is arranged in consecutive RBs, but it may also be arranged discontinuously.

[0080] The configuration of the bandwidth (M RBs) may reuse the configuration of Rel. 17. That is, M may be m SRS,b or. Or, when the partial frequency sounding of Rel. 17 is configured, M is m SRS,b / P F is.

[0081] [Aspect 2-1] In Aspect 2-1, the combination of the processing in the second embodiment and the transmission comb at the subcarrier level (see, for example, FIG. 6) will be described. The processing in the second embodiment is to transmit SRS in X RBs for every N RBs. For example, it is assumed that N>1 and X<N. Further, the UE receives configuration information indicating the third number (K TC ) and may control the transmission of SRS in one subcarrier for each subcarrier of the third number (K TC ) in the second number (X) of RBs. As shown in the first embodiment, K TC may be 12 or more.

[0082] [[Option 2-1-1]] The processing in the second embodiment may be combined with the transmission comb at the subcarrier level. That is, the UE can transmit SRS in X RBs for every N RBs, and in those X RBs, transmit SRS in one subcarrier for each subcarrier of K TC . K TC may be set by upper layer signaling / physical layer signaling. For each value of X, or each value of N, or each combination of (X, N), valid candidate values of K TC may be defined. For example, K TC ≦X*N SC RB may be defined. N SC RB is the number of subcarriers in the RB, that is, 12.

[0083] Figure 16A shows an example of the SRS configuration in option 2-1-1. In Figure 16A, (X=1, N=4), and K TC The SRS configuration when = 2 is shown.

[0084] [[Option 2-1-2]] The processing in the second embodiment may not be used in conjunction with a subcarrier-level transmission comb. The UE can transmit SRS in X RBs for every N RBs, and in those X RBs, it may transmit SRS for each subcarrier (in all subcarriers).

[0085] Figure 16B shows an example of SRS placement in Option 2-1-2. In Figure 16B, (X=1, N=4), and SRS is placed in all subcarriers within the RB corresponding to X=1.

[0086] [[Option 2-1-3]] The UE may be configured by upper-layer signaling / physical-layer signaling, or determined based on UE capability, to determine whether the processing in the second embodiment can be used in conjunction with subcarrier-level transmission combs (i.e., whether to apply option 2-1-1 or 2-1-2).

[0087] According to embodiment 2-1, the transmission bandwidth of the SRS can be reduced at both the RB level and the subcarrier level, thereby achieving lower RS ​​overhead.

[0088] [Aspect 2-2] Apparatus 2-2 describes the process in the second embodiment and its combined use with RB-level partial frequency sounding (RPFS) in Rel. 17. The process in the second embodiment involves transmitting SRS at X RBs for every N RBs, for example, N > 1, X <Nであるとする。

[0089] [[Option 2-2-1]] The processing in the second embodiment may be used in combination with RPFS. For example, the parameter FreqScalingFactor(P F )(For example, P F >1) If this is set, the processing in the second embodiment may be used in combination with RPFS. For each value of X, each value of N, or each combination of (X,N), P F Valid candidate values ​​for P may be defined. For example, P F <=m SRS,b It may also be defined as / N.

[0090] The UE determines the SRS configuration when it is set to transmit SRS in a second number (X) of RBs for every first number (N) of RBs, and when SRS is configured in some of the RBs among multiple RBs (for example, P F If an SRS is configured for a particular RB in both (or at least one) the SRS configuration (when >1 is set), then the transmission of the SRS is controlled for that particular RB.

[0091] The processing in the second embodiment and a specific example of its use in combination with RPFS will be described. Figure 17 shows a specific example of option 2-2-1. In Figure 17, (X=1, N=4), and P F This shows the SRS configuration when = 2.

[0092] In Example 1 of Figure 17, the first SRS configuration is shown when it is configured to transmit SRS at X RBs (1 RB in the example) for every N RBs (3 RBs in the example), and in RPFS, P F If an SRS is present for a particular RB (if it overlaps) in both the second SRS placement (when =2 is set) and the second SRS placement, the UE will send an SRS for that particular RB.

[0093] In Example 2 of Figure 17, the first SRS configuration is shown when it is configured to transmit SRS at X RBs (1 RB in the example) for every N RBs (3 RBs in the example), and in RPFS, PF If an SRS is configured for a particular RB in at least one of the second SRS configurations when =2 is set, the UE transmits an SRS for that particular RB.

[0094] In Examples 1 and 2, the length of the SRS sequence is LN SC RB / (K TC ) may also be the case. In Example 1, L is the number of RBs included in the intersection of the two SRS configurations (the first SRS configuration and the second SRS configuration). In Example 2, L is the number of RBs included in the union of the two SRS configurations (the first SRS configuration and the second SRS configuration). When option 2-1-2 of Embodiment 2-1 is applied, i.e., when the processing in the second embodiment cannot be used in conjunction with a subcarrier-level transmission comb, K TC The result is 1.

[0095] [[Option 2-2-2]] The processing in the second embodiment may not be usable in conjunction with RPFS. In other words, the UE is the processing in the second embodiment and the parameter P used in RPFS. F (For example P F >1) It is not necessary to assume that both are set.

[0096] [[Option 2-2-3]] Whether the UE can use the processing in the second embodiment in conjunction with RPFS (i.e., whether to apply option 2-2-1 or 2-2-2) may be determined by upper-layer signaling / physical-layer signaling or based on UE capability.

[0097] According to Embodiment 2-2, by using the processing in the second embodiment in combination with RPFS, the transmission bandwidth of SRS can be reduced at both the RB level and the subcarrier level, thereby achieving lower RS ​​overhead.

[0098] [Aspect 2-3] Apparatus 2-3 describes the length of the SRS sequence. The length of the SRS sequence is m SRS,b N sc RB X / (K TC P F It can be expressed as N). Here, m SRS,b , K TC , P F The parameters from Rel.17 can be reused. X and N are new parameters described in the second embodiment.

[0099] When applying option 2-1-2 of embodiment 2-1, that is, when the processing in the second embodiment cannot be used in conjunction with a subcarrier-level transmission comb, K TC This becomes 1. When option 2-2-2 of embodiment 2-2 is applied, i.e., the processing in the second embodiment cannot be used in combination with RPFS, P F The result is 1.

[0100] [Aspect 2-4] Appearance 2-4 is the maximum number of cyclic shifts (n SRS cs,max This explains ).

[0101] [[Option 2-4-1]] The maximum number of cyclic shifts may reuse the definition from Rel. 15 / 16 / 17. That is, the maximum number of cyclic shifts is K TC The values ​​may be predefined in the specifications for each value (see, for example, Figure 7).

[0102] [[Option 2-4-2]] The UE may determine the maximum number of cyclic shifts based on the parameter N in the second embodiment. The relationship between the maximum number of cyclic shifts and N may be predefined in the specification.

[0103] [[Option 2-4-3]] The UE may determine the maximum number of cyclic shifts based on the parameter X in the second embodiment. The relationship between the maximum number of cyclic shifts and X may be predefined in the specification.

[0104] [[Option 2-4-4]] UE is K TC The maximum number of cyclic shifts may be determined based on a combination of at least one of X and N. TC The correspondence between combinations of X and N, at least one of them, may be predefined in the specification. For example, NK TC The relationship between the value of / X and the maximum number of cyclic shifts may be defined in the specifications beforehand.

[0105] [Aspect 2-5] Appearance 2-5 describes frequency hopping. The process in the second embodiment described below involves transmitting SRS at X RBs for every N RBs, for example, N > 1, X <Nであるとする。

[0106] [[Option 2-5-1]] The processing in the second embodiment may not be used in conjunction with frequency hopping. The UE does not need to assume that the processing in the second embodiment will be used in conjunction with frequency hopping. In this case, all SRS transmissions occupy the same bandwidth (M RBs) (see, for example, Figure 18A). Within the bandwidth (M RBs), the UE transmits SRS in X RBs for every N RBs in one symbol.

[0107] [[Option 2-5-2]] The processing in the second embodiment may be used in conjunction with frequency hopping. The UE may receive settings related to frequency hopping. The UE may assume that the processing in the second embodiment is used in conjunction with frequency hopping. If different frequency domains are set for different time domains (e.g., one or more slots / symbols) as SRS transmittable frequency domains (i.e., frequency hopping is set), the UE controls SRS transmission in a second number (X) of RBs for every first number (N) of RBs within that frequency domain.

[0108] Figure 18B shows an example of option 2-5-2. In Figure 18B, SRS transmission in different time domains occupies different frequency domains (M RBs). Within the M RBs, the UE transmits SRS in one RB for every four RBs in one symbol.

[0109] For example, the frequency hopping pattern of Rel.17 may be reused. That is, the RB level offset of the frequency domain start position of each SRS transmission introduced by frequency hopping can be calculated by reusing Rel.17. In other words, the following equation (6) may be applied. Note that B SRS , m SRS,b , n b , k F , k hop , P F The value from Rel.17 may be reused. If RPFS is not applied, P F The result is 1.

[0110]

number

[0111] [[Option 2-5-3]] The UE may determine whether the processing in the second embodiment can be used in conjunction with frequency hopping by upper-layer signaling / physical-layer signaling, or based on the capabilities of the UE.

[0112] The definition and determination of "SRS transmission" may reuse those from Rel.17. "SRS transmission" may occupy R adjacent symbols of SRS resources within a single slot, where R is the repetition coefficient set as the RRC parameter.

[0113] Furthermore, embodiment 2-5 may be applied in combination with embodiment 2-1 or embodiment 2-2. In other words, even when frequency hopping is used, the processing in the second embodiment may be used in combination with a subcarrier level transmit comb (see, for example, Figure 6), or the processing in the second embodiment may be used in combination with RB level partial frequency sounding (RPFS) in Rel. 17.

[0114] According to embodiment 2-5, even when frequency hopping is applied, the transmission bandwidth of the SRS can be reduced at the RB level, thereby achieving lower RS ​​overhead.

[0115] [Aspect 2-6] Embodiment 2-6 describes the RB level offset of the frequency domain start position at each SRS port of the SRS resource in the OFDM symbol. The UE, along with the first number (N) and the second number (X) mentioned above, provides information (N) indicating the offset for each port used for SRS transmission. offset (Pi) The system may receive the ) and use the offset to control SRS transmission in X resource blocks (RBs) for every N resource blocks (RBs).

[0116] Within the bandwidth of M RBs, each SRS port of a given SRS resource transmits SRS in X RBs for every N RBs in the OFDM symbol. The RB level offset N is at the frequency domain start position of each SRS port. offset (Pi) Defines the start RB of the SRS port pi, n shift +N offset (Pi) This can be expressed as +S1, where n shiftThe RRC setting parameter R17 can be reused. S1 may be another parameter for determining the starting position, for example, an offset brought about by frequency hopping.

[0117] Figure 19 shows an example of an offset in embodiment 2-6. In Figure 20, X=1, N=4, and N offset (Pi) However, examples of offsets for the cases of 0, 1, 2, or 3 are shown.

[0118] N of each SRS port offset (Pi) This may be set by upper-layer signaling / physical layer signaling. For example, an SRS port-independent offset N _ offset={0,1,…,N-1} is set as the RRC parameter, and UE is N _ Based on the offset, offset (Pi) You may decide on N. _ The offset may be a subset of {0, 1, ..., N-1}. _ The offset may have a fixed value (for example, 0) that is defined in advance.

[0119] [[Option 2-6-1]] N offset (Pi) This may be common to all SRS ports of the SRS resource. That is, N offset (Pi) =N _ The offset is applied to any SRS port value pi, and all SRS ports may occupy the same RB.

[0120] Figures 20A and 20B show examples of SRS configurations for option 2-6-1. Figure 20A shows the SRS configuration when X=1 and N=4, and Figure 20B shows the SRS configuration when X=2 and N=4. In Figures 20A and 20B, all SRS ports (1000, 1001, 1002, 1003) occupy the same RB, and offset Noffset (Pi) This is also common to all.

[0121] [[Option 2-6-2]] N offset (Pi) This may be a different value for each SRS port of the SRS resource. In other words, different SRS ports may occupy different RBs. UE is, for example, N offset (Pi) N _ It may also be derived based on a function of offset and pi. offset (Pi) When two groups of SRS ports are configured, it is expressed as in equation (7), and when G groups of SRS ports are configured, it is expressed as in equation (8).

[0122]

number

[0123]

number

[0124] N offset (Pi) This may differ for each group of SRS ports. offset (Pi) This may be common to all SRS ports within a group. The grouping of SRS ports may be predefined in the specification. For example, SRS ports 1000 and 1002 may be set in one group, and SRS ports 1001 and 1003 may be set in another group. SRS ports in different SRS groups occupy different RBs, while SRS ports within the same SRS group occupy the same RB.

[0125] Figures 21A and 21B are diagrams showing examples of SRS arrangements for Option 2-6-2. Figure 21A shows an SRS arrangement when X = 1 and N = 4, and Figure 21B shows an SRS arrangement when X = 2 and N = 4. In Figures 21A and 21B, SRS ports 1000 and 1002 form one group, occupy the same RB, and have a common offset N offset (Pi) which is common. Also, SRS ports 1001 and 1003 form one group, occupy the same RB, and have a common offset N offset (Pi) which is common, but is different from the offset of SRS ports 1000 and 1002.

[0126] Note that when there is one SRS port in each group, Option 2-6-1 may be applied. The UE may set the application of Option 2-6-1 or Option 2-6-2 by upper layer signaling / physical layer signaling, or may determine it based on UE capabilities. Option 2-6-1 or Option 2-6-2 may be applied using different predefined conditions (number of SRS ports, X, N, maximum cyclic shift number).

[0127] According to Aspect 2-6, when the processing of the second embodiment is implemented, the offset can be appropriately set.

[0128] [Aspect 2-7] In Aspect 2-7, the RB-level offset of the frequency domain start position in each OFDM symbol within the slot for the SRS resource will be described. In Aspect 2-7, the UE receives information (N offset (Pi) ) indicating the offset for each port used for SRS transmission, together with the above-mentioned first number (N) and second number (X), and further receives information (N offset (l') ) indicating the offset for each symbol, and may control SRS transmission in X RBs for each of the N resource blocks (RBs) using the offset for each port and the offset for each symbol.

[0129] RB level offset N of the frequency domain start position in each OFDM symbol offset (l') is defined. When combined with Embodiment 2-6, the starting RB of SRS port pi in symbol l' is n shift +N offset (Pi) +N offset (l') +S2, or n shift +(N offset (Pi) +N offset (l') ) mod N + S2. Here, n shift can reuse Rel.17, which is an RRC configuration parameter. l' indicates the symbol position (l' = 0, 1,... means the first symbol / second symbol / ... of the SRS resource). S2 may be another parameter for determining the start position, for example, an offset caused by frequency hopping. S2 may be the same as S1 in Embodiment 2-6 or different from it.

[0130] FIG. 22 is a diagram showing an example of an offset in Embodiment 2-7. In FIG. 22, X = 1, N = 4, and N offset (Pi) +N offset (l') shows an example of the SRS configuration when it is 0, 1, 2, or 3.

[0131] The offset N of each OFDM symbol offset (l') may be set by upper layer signaling / physical layer signaling. For example, an offset N _ offset_1 = {0, 1,..., N - 1} that does not depend on the OFDM symbol is set as an RRC parameter, and the UE may determine N _ based on offset_1. N offset (l') _ offset_1 may be a subset of {0, 1,..., N - 1}. N _ ​offset_1 may have a fixed value (for example, 0) that is defined in advance.

[0132] [[Option 2-7-1]] N offset (l') This may be common to all symbols in a particular slot. That is, N offset (l') =N _ offset_1 is applied to the value of any OFDM symbol l', and all OFDM symbols may occupy the same RB.

[0133] Figures 23A and 23B show examples of SRS placement for option 2-7-1. Figure 23A shows an example where X=1 and N=4, and Figure 23B shows an example where X=2 and N=4. In Figures 23A and 23B, the SRS occupies the same RB for all OFDM symbols, and the offset is also common.

[0134] [[Option 2-7-2]] N offset (l') This may be a different value for each OFDM symbol in the slot. In other words, SRS may occupy different RBs for different OFDM symbols. UE is, for example, N offset (l') =N _ It may also be derived based on the functions of offset_1 and l'. offset (l') When two groups of OFDM symbols are set, it is expressed as in equation (9), and when G groups of OFDM symbols are set, it is expressed as in equation (10).

[0135]

number

[0136]

number

[0137] Figures 24A and 24B show examples of SRS configurations for option 2-7-2. Figure 24A is an example where X=1 and N=4, and Figure 24B is an example where X=2 and N=4. In Figures 24A and 24B, the SRS occupies a different RB for each OFDM symbol, and offset N offset (l') This varies depending on the OFDM symbol.

[0138] N offset (l') This may differ for each group of symbols. offset (l') This may be common to symbols within a group. Symbol grouping may be predefined in the specification. SRS occupies different RBs in OFDM symbols of different groups, and the same RB in OFDM symbols within the same group.

[0139] If there is one OFDM symbol in each group, option 2-7-1 may be applied. The UE may determine whether to apply option 2-7-1 or option 2-7-2 by upper-layer signaling / physical-layer signaling, or based on UE capabilities. Option 2-7-1 or option 2-7-2 may be applied using different predefined conditions (number of symbols in the SRS resource, resource type of the SRS resource, usage of the SRS resource, value of N).

[0140] According to Embodiment 2-7, when the processing of the second embodiment is performed, the offset for each symbol can be appropriately set.

[0141] [Aspect 2-8] Apparatus 2-8 describes the case of option 2-1-1 of Apparatus 2-1, that is, the subcarrier level offset when it is possible to use it in combination with a subcarrier level transmit comb. The UE is a third number (K TC Information indicating ) and subcarrier level offset (k offset(Pi) Further information indicating ) is received. Then, the UE can transmit SRS in X RBs for every N RBs, with a subcarrier level offset (k offset (Pi) Using ), in those X RBs, K TC SRS is transmitted on one subcarrier for each subcarrier.

[0142] In each RB, each SRS port of the SRS resource in the OFDM symbol is K TC Each subcarrier transmits SRS with one subcarrier. In this case, the starting subcarrier in the X RBs of SRS port pi is k offset (Pi) It can be defined as follows.

[0143] k offset (Pi) This may be set by upper-layer signaling / physical layer signaling. For example, an SRS port-independent offset k _ offset={0,1,…,K TC -1} is set as the RRC parameter, and UE is k _ k based on offset offset (Pi) You may decide on k. _ The offset is {0, 1, ..., K}. TC It may also be a subset of {-1}. _ The offset may have a fixed value (for example, 0) that is defined in advance.

[0144] Figure 25 shows an example of an offset in embodiment 2-8. In Figure 25, X=1, N=4, K TC =4, K offset (Pi) However, this shows examples of SRS configurations for cases 0, 1, 2, or 3.

[0145] [[Option 2-8-1]] k offset (Pi)may be common to all SRS ports sharing the same RB. That is, k offset (Pi) = k _ offset is applied to the value of any SRS port pi, and all SRS ports may occupy the same subcarriers within X RBs. Also, different SRS ports may occupy different subcarriers.

[0146] [[Option 2-8-2]] k offset (Pi) may have different values for each SRS port sharing the same RB. That is, different SRS ports may occupy different RBs. The UE may derive k offset (Pi) based on a function of k _ offset and pi. Different SRS ports may occupy different subcarriers in X RBs. k offset (Pi) is expressed as in Equation (11) when two groups of SRS ports are set, and is expressed as in Equation (12) when G groups of SRS ports are set.

[0147] [[Number]]

[0148] [[Number]]

[0149] k offset (Pi) may be different for each group of SRS ports. k offset (Pi)This may be common to all SRS ports within a group. The grouping of SRS ports may be predefined in the specifications. For example, SRS ports 1000 and 1002 may be set in one group, and SRS ports 1001 and 1003 may be set in another group. SRS ports in different SRS groups occupy different subcarriers, while SRS ports in the same SRS group occupy the same subcarriers.

[0150] Figure 26A shows an example of the SRS configuration for option 2-8-1. Figure 26B shows an example of the SRS configuration for option 2-8-2. The UE can transmit SRS on one RB for every four RBs, and on that one RB, it transmits SRS on one subcarrier for every four (Figure 26A) or two (Figure 26B) subcarriers. In Figures 26A and 26B, all SRS ports occupy the same RB. In Figure 26A, SRS ports 1000, 1001, 1002, and 1003 occupy the same subcarrier. In Figure 26B, SRS ports 1000 and 1002 are a single group and occupy the same subcarrier. Also, SRS ports 1001 and 1003 are a single group and occupy the same subcarrier.

[0151] Figures 27A and 27B show other examples of SRS configurations for option 2-8-2. In Figure 27A, the UE can transmit SRS on one RB for every two RBs, and alternately uses SRS ports 1000 and 1002 on the transmittable RBs. The UE also transmits SRS on one subcarrier for every four subcarriers. In Figure 27A, SRS ports 1000 and 1002 form a single group, occupying the same RB and the same subcarrier.

[0152] In Figure 27B, the UE can transmit SRS on one RB for every two RBs. In the RBs that can transmit, the RBs that apply SRS ports 1000 and 1002 (the first group of RBs) and the RBs that apply SRS ports 1001 and 1003 (the second group of RBs) are alternately configured. SRS ports 1000 and 1002 belong to the same group and occupy the same RB, and SRS ports 1001 and 1003 belong to the same group and occupy the same RB. The UE also transmits SRS on one subcarrier for every two subcarriers. In the first group of RBs, SRS ports 1000 and 1002 are applied alternately. In the second group of RBs, SRS ports 1001 and 1003 are applied alternately. In other words, SRS ports 1000 and 1002 occupy different subcarriers, and SRS ports 1001 and 1003 occupy different subcarriers.

[0153] If each group has one SRS port, option 2-8-1 may be applied. The UE may configure the application of option 2-8-1 or option 2-8-2 via upper-layer signaling / physical-layer signaling, or it may be determined based on UE capabilities. Option 2-8-1 or option 2-8-2 may be applied using different predefined conditions (number of SRS ports, X, N, maximum cyclic shift).

[0154] k in Rel.17 TC (Pi) Reuse k offset (Pi) It may also be applied to k. TC (Pi) to k offset (Pi) Used for k _ offset to k TC You may also use [this].

[0155] According to Embodiment 2-8, when a subcarrier-level transmitting comb is used in conjunction with the processing of the second embodiment, the offset can be appropriately set.

[0156] [Aspect 2-9] Apparatus 2-9 describes the case of option 2-1-1 of Apparatus 2-1, i.e., the offset when it can be used in conjunction with a subcarrier-level transmit comb. The UE is a third number (K TC Information indicating ) and subcarrier level offset (k offset (Pi) Information indicating ) and the offset (k) for each symbol used for SRS transmission offset (l') The UE then receives information indicating the subcarrier level offset (k offset (Pi) ) and the offset for each symbol (k offset (l') Using ), SRS can be transmitted in X RBs for every N RBs, and in those X RBs, K TC SRS is transmitted on one subcarrier for each subcarrier.

[0157] In embodiment 2-9, the starting subcarriers in the X RBs of the SRS port pi in symbol l' are k offset (Pi) +k offset (l') , or (k offset (Pi) +k offset (l') )mod K TC It is expressed as follows.

[0158] k of each OFDM symbol offset (l') This may be set by upper-layer signaling / physical layer signaling. For example, an SRS port-independent offset k _ offset_1={0,1,…,K TC -1} is set as the RRC parameter, and UE is k _ k based on offset_1 offset (l') You may decide on k. _ offset_1 is {0,1,…,K TC It may also be a subset of {-1}. _offset_1 may have a fixed value (for example, 0) that is defined in advance.

[0159] Figure 28 shows an example of an offset in embodiment 2-9. In Figure 28, X=1, N=4, K TC =4, and k offset (Pi) +k offset (l') However, this shows examples of SRS configurations for cases 0, 1, 2, or 3.

[0160] [[Option 2-9-1]] k offset (l') This may be common to all symbols within the slot of the SRS resource. That is, k offset (l') =k _ offset_1 is applied to any OFDM symbol l' value, and all SRS ports may occupy the same subcarrier in X RBs.

[0161] [[Option 2-9-2]] k offset (l') The values ​​may be different for different symbols within the slot of the SRS resource. In other words, different OFDM symbols may occupy different RBs. The UE is, for example, k offset (l') k _ It may also be derived based on a function of offset_1 and l'. Different OFDM symbols may occupy different subcarriers in X RBs. offset (l') When two groups of symbols are set, it is expressed as in formula (13), and when G groups of symbols are set, it is expressed as in formula (14).

[0162]

number

[0163]

number

[0164] k offset (l') This may differ for each group of OFDM symbols. offset (l') Symbols within a group may share common characteristics. Symbol grouping may be predefined in the specification. Symbols in different groups occupy different subcarriers, while symbols within the same group occupy the same subcarrier.

[0165] Figure 29A shows an example of the SRS configuration for option 2-9-1. Figure 29B shows an example of the SRS configuration for option 2-9-2. The UE can transmit SRS in one RB for every four RBs, and in that one RB, it transmits SRS in one subcarrier for every four subcarriers. In Figure 29A, all OFDM symbols occupy the same RB and the same subcarrier, and k offset (l') The values ​​are different. In Figure 29B, all OFDM symbols occupy the same RB, but different OFDM symbols occupy different subcarriers, and k for each symbol. offset (l') They are different.

[0166] Figures 30A and 30B show other examples of SRS configurations for option 2-9-2. The UE can transmit SRS in one RB for every four RBs, and in that one RB, it transmits SRS in one subcarrier for every four subcarriers. In Figure 30A, different OFDM symbols occupy different RBs, but some (two) OFDM symbols occupy the same RB, and the symbols occupying the same RB occupy the same subcarrier. In Figure 30B, different OFDM symbols occupy different RBs, but some (two) OFDM symbols occupy the same RB, and the different symbols occupy different subcarriers.

[0167] If there is one OFDM symbol in each group, option 2-9-1 may be applied. The UE may determine whether to apply option 2-9-1 or option 2-9-2 by upper-layer signaling / physical-layer signaling, or based on UE capabilities. Option 2-9-1 or option 2-9-2 may be applied using different predefined conditions (number of symbols in the SRS resource, resource type of the SRS resource, usage of the SRS resource, value of N).

[0168] k in Rel.16 / 17 offset l Reusing k in aspect 2-9 offset (l') It may be applied.

[0169] The second embodiment may be supported for at least one of P-SRS, SP-SRS, and A-SRS. The second embodiment may be supported only for SRSs that use at least one of codebook, non-codebook, beam management, and antenna switching. The second embodiment may or may not be supported for positioning SRS.

[0170] According to Embodiment 2-9, when a subcarrier-level transmitting comb is used in conjunction with the processing of the second embodiment, the offset for each symbol can be appropriately set.

[0171] <Variation> The SRS transmission bandwidth may be divided into multiple subbands. The SRS transmission pattern (density) may differ for each subband. Either option 1 or option 2 below may be applied to the subband configuration.

[0172] [Option 1] The entire bandwidth of the SRS resource in the OFDM symbol (e.g., M RBs) may be divided into Y subbands, with Y set such that each subband has M / Y RBs.

[0173] [Option 2] The size of each subband (number of RBs) is, for example, Z1, Z2, ..., Z Y Let's assume that the size common to each subband is Z1=Z2=...=Z Y The size may be set to either a single value or the size of each subband may be set individually (differently).

[0174] Figure 31 shows an example of applying a modification to the first embodiment. Number of transmitting combs K TC However, it may be set differently for each subband. In Figure 31, in the first subband, K TC =12, in the second subband, K TC =4 is set.

[0175] Figure 32 shows an example of applying a modified version of the second embodiment. At least one of the values ​​of X and N may be set differently for each subband. That is, each subband may be set to a different X, a different N, or a different combination of (X,N). In Figure 32, the first subband is set to X=1, N=2, and the second subband is set to X=1, N=4.

[0176] Figure 33 shows an example in which the first and second embodiments are used in combination and further modified. X,N,K TC At least one of the values ​​may be set differently for each subband. In Figure 33, in the first subband, X=1, N=2, K TC =2 is set, and in the second subband, X=1, N=4, K TC =4 is set.

[0177] The UE may use a single sequence for SRS transmission across the entire bandwidth, or use different sequences for each of the multiple subbands, or for each subband.

[0178] [Different K for each subband] TC Cases where a value is set] Different K for each subband TC In cases where the value is set, the length of the sequence when using one sequence for the entire bandwidth of SRS transmission on an OFDM symbol is expressed as (Equation 15).

[0179]

number

[0180] Here, s is the index of each subband, Y is the number of subbands, and Z S is the number of RBs in subband s, and K TC,s K is from the subband s TC That is the case.

[0181] Different K for each subband TC In the case where the value of is set, if one sequence is applied to each subband, the length of the sequence for subband s is expressed as (Equation 16).

[0182]

number

[0183] [Cases where different combinations of X, N, or (X,N) are set for each subband] In cases where different combinations of X, N, or (X,N) are set for each subband, the length of the sequence when using one sequence for the entire bandwidth of SRS transmission on the OFDM symbol is expressed as (Equation 17).

[0184]

number

[0185] Here, s is the index of each sub-band, Y is the number of sub-bands, and Z S is the number of RBs in sub-band s, and K TC,s is K in sub-band s TC and X s , N s are the values of X and N in sub-band s.

[0186] In the case where different combinations of X, N or (X, N) are set for each sub-band, when one sequence is applied to each sub-band, the length of the sequence of sub-band s is expressed as (Equation 18).

[0187]

Number

[0188] According to a modification, for each sub-band, at least one of X, N, and K TC can be flexibly set.

[0189] <UE capability> The UE may transmit (report) UE capability information indicating whether the UE supports at least one of the examples in the present disclosure to the network (base station). At least one of the examples in the present disclosure may be applied only to the UE that has transmitted the specific UE capability information or the UE that supports the specific UE capability. Further, the UE may receive information instructing at least one of the examples in the present disclosure by upper layer signaling / physical layer signaling. The information may correspond to the UE capability information transmitted by the UE. The UE capability information may be, for example, at least one of the following (1) to (9). (1) to (5) correspond to the first embodiment, and (6) to (9) correspond to the second embodiment.

[0190] (1) Whether the UE supports a new large transmission comb number K TC or not. (2) For P-SRS / SP-SRS / A-SRS, the UE has a new (12 or more) number of transmit combs K TC Does it support this? (3) For SRSs whose usage is set to Codebook / Non-Codebook / Beam Management / Antenna Switching, the UE will provide a new (12 or more) number of transmit combs. TC Does it support this? (4) UE has a new (12 or more) number of transmit combs K for positioning SRS TC Does it support this? (5) Supporting K TC The value. (6) Whether the UE supports aspects 2-1 to 2-9 for P-SRS / SP-SRS / A-SRS. (7) Whether the UE supports aspects 2-1 to 2-9 for SRS using codebook / non-codebook / beam management / antenna switching. (8) Whether the UE supports Proposal 2, Proposals 2-1 to 2-9 for positioning SRS. (9) Supported X, N, k TC The respective values ​​of X, N, and k TC A combination.

[0191] (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 or a combination thereof of the wireless communication methods according to the above embodiments of this disclosure.

[0192] Figure 34 shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication 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).

[0193] 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 so on.

[0194] 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.

[0195] 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))).

[0196] 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 and number 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.

[0197] 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).

[0198] 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 (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may fall in a frequency band higher than FR2.

[0199] Furthermore, the user terminal 20 may communicate using at least one of the following methods at each CC: Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0200] Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, if 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.

[0201] 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.

[0202] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0203] 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-FDMA), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0204] 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.

[0205] 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, shared by each user terminal 20.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] Furthermore, the DCI that schedules PDSCH may be called a DL assignment or DL ​​DCI, and the DCI that schedules PUSCH may be called a UL grant or UL DCI. Furthermore, PDSCH may be interpreted as DL data, and PUSCH may be interpreted as UL data.

[0210] 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. The UE may monitor CORESETs associated with a particular search space based on the search space configuration.

[0211] 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.

[0212] PUCCH may transmit uplink control information (UCI) which includes at least one of the following: channel state information (CSI), delivery acknowledgment (e.g., 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.

[0213] In this disclosure, downlinks, uplinks, etc., may be expressed without the prefix "link." Also, the prefix "physical" may be omitted when describing various channels.

[0214] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc., may be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc., may be transmitted.

[0215] 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. SS, SSB, etc., may also be called reference signals.

[0216] Furthermore, in the wireless communication system 1, the Uplink Reference Signal (UL-RS) may transmit the Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), etc. The DMRS may also be called the User-Specific Reference Signal (UE-specific Reference Signal).

[0217] (base station) Figure 35 shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, transceiver unit 120, transceiver antenna 130, and transmission line interface 140 may be provided.

[0218] 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.

[0219] 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 art relating to this disclosure.

[0220] 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 transceiver unit 120, the transceiver antenna 130, and the 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 transceiver 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 radio resources, etc.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] The transmitting / receiving unit 120 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0226] 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), the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc., to generate a bit sequence to be transmitted.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] The transmitting / receiving unit 120 (receiving processing unit 1212) may apply reception processing to the acquired baseband signal, 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 acquire user data, etc.

[0231] 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.

[0232] The transmission path interface 140 may send and receive signals (backhaul signaling) with devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0233] 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.

[0234] The transmitting / receiving unit 120 may transmit information indicating a first number and a second number related to the reception of a measurement reference signal (SRS). The control unit 110 may control the reception of the SRS in the second number of resource blocks (RBs) for each of the first number of resource blocks (RBs).

[0235] The transmitting / receiving unit 120 may receive information indicating a first number, a second number, and an offset for each port used to transmit the measurement reference signal (SRS). The control unit 110 may use the offset for each port to control the transmission of the SRS in the second number of resource blocks (RBs) for each first number of resource blocks (RBs).

[0236] (User terminal) Figure 36 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] The transmitting / receiving unit 220 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0245] 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, etc., to generate a bit sequence to be transmitted.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] In this disclosure, the transmitting and receiving units of the user terminal 20 may consist of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0253] The transmitting / receiving unit 220 may receive information indicating a first number and a second number related to the transmission of a measurement reference signal (SRS). The control unit 210 may control the transmission of the SRS in the second number of resource blocks (RBs) for each of the first number of resource blocks (RBs).

[0254] The transmitting / receiving unit 220 receives information indicating a third number, and the control unit 210 controls the transmission of the SRS in the second number of RBs, with one subcarrier for each subcarrier of the third number, and the third number may be 12 or more.

[0255] The control unit 210 may control the transmission of the SRS at a specific RB if an SRS is configured for that specific RB, in both a first SRS configuration where the SRS is configured to be transmitted at a second number of RBs for each first number of RBs, and a second SRS configuration where the SRS is configured to be transmitted at some of the RBs among a plurality of RBs.

[0256] If different frequency domains are set for different time domains as frequency domains in which SRS can be transmitted, the control unit 210 may control the transmission of the SRS in the second number of RBs for every first number of RBs within the frequency domain.

[0257] The transmitting / receiving unit 220 may receive information indicating a first number, a second number, and an offset for each port used to transmit the measurement reference signal (SRS). The control unit 210 may use the offset for each port to control the transmission of the SRS in the second number of resource blocks (RBs) for each first number of resource blocks (RBs).

[0258] The transmitting / receiving unit 220 may further receive information indicating the offset for each symbol used for transmitting the SRS, and the control unit 210 may use the offset for each port and the offset for each symbol to control the transmission of the SRS in a second number of RBs for every first number of RBs.

[0259] The transmitting / receiving unit 220 further receives information indicating a third number and information indicating a subcarrier level offset, and the control unit 210 may use the subcarrier level offset to control the transmission of the SRS in the second number of RBs, one subcarrier for each of the third number of subcarriers.

[0260] The transmitting / receiving unit 220 further receives setting information indicating a third number, information indicating a subcarrier level offset, and information indicating an offset for each symbol used for transmitting the SRS. The control unit 210 may use the subcarrier level offset and the offset for each symbol to control the transmission of the SRS in the second number of RBs, with one subcarrier for each of the third number of subcarriers.

[0261] (Hardware configuration) The block diagrams used in the description of the above embodiments show 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.

[0262] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, 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.

[0263] 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 37 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.

[0264] 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 to omit some of the devices.

[0265] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, processing may be performed by one processor, or by two or more processors simultaneously, sequentially, or by other means. Note that processor 1001 may be implemented using one or more chips.

[0266] 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 to control at least one of the reading and writing of data in the memory 1002 and storage 1003.

[0267] 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 units, 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.

[0268] 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.

[0269] 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. Memory 1002 may also be called a register, cache, or main memory. Memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of this disclosure.

[0270] 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 multipurpose disk, a Blu-ray 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. Storage 1003 may also be called an auxiliary storage device.

[0271] 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).

[0272] 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).

[0273] 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.

[0274] 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.

[0275] (modified version) In addition, 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.

[0276] 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.

[0277] Here, the neuralelogy may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neuralelogy 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, or specific windowing processes performed by the transceiver in the time domain.

[0278] 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.

[0279] A slot may include multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Mini-slots may also be called sub-slots. Mini-slots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (PUSCH) mapping type B.

[0280] 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.

[0281] For example, one subframe may be called TTI, multiple consecutive subframes may be called TTI, or one slot or one mini-slot may be called TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Note that the unit representing TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0282] Here, TTI refers to, for example, the smallest unit of time 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.

[0283] 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. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0284] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0285] A TTI with a time length of 1 ms may also be called a normal TTI (TTI in 3GPP Rel.8-12), a long TTI, a normal subframe, a long subframe, or a slot. A TTI shorter than a normal TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini slot, a sub slot, or a slot.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0290] 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.

[0291] A Bandwidth Part (BWP) (also called a partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. Here, the common RBs may be identified by an index of the RBs relative to the carrier's common reference point. PRBs may be defined and numbered within a BWP.

[0292] A BWP may include UL BWPs (BWPs for UL) and DL BWPs (BWPs for DL). One or more BWPs may be configured within a single carrier for a UE.

[0293] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0294] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative examples. For instance, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots within 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 a TTI can be varied in various ways.

[0295] 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.

[0296] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements that use 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] 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).

[0301] 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 Element (CE).

[0302] 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).

[0303] The determination may be made by a value represented by 1 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).

[0304] 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.

[0305] 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.

[0306] 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).

[0307] 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," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," and "panel" may be used interchangeably.

[0308] 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.

[0309] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can 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.

[0310] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0311] 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.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] Figure 38 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.

[0316] 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.

[0317] 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).

[0318] 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 signal of accelerator pedal 43 acquired by accelerator pedal sensor 55, brake pedal depression signal of brake pedal 44 acquired by brake pedal sensor 56, operation signals of shift lever 45 acquired by shift lever sensor 57, and detection signals for detecting obstacles, vehicles, pedestrians, etc., acquired by object detection sensor 58.

[0319] 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, displays, 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 (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0320] 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.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0321] 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.

[0322] 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.

[0323] 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).

[0324] 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 information based on the above input.

[0325] 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).

[0326] 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.

[0327] 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 that the base station 10 has. 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 and downlink channel may be interpreted as sidelink channel.

[0328] 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.

[0329] 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 with 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.

[0330] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between 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 in an exemplary order and are not limited to that specific order.

[0331] Each aspect / embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (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®), and IEEE This may apply to systems utilizing 802.20, Ultra-WideBand (UWB), Bluetooth®, or other appropriate wireless communication methods, as well as next-generation systems that are extended, modified, created, or defined based on these. It may also apply to combinations of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0332] 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."

[0333] 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.

[0334] The term “determining” as used in this disclosure may encompass a wide variety of actions. For example, “determining” may be considered to include judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in tables, databases, or other data structures), ascertaining, etc.

[0335] 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).

[0336] Furthermore, "judgment (decision)" can be considered as "judging (deciding)" something like resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can be considered as "judging (deciding)" something about an action.

[0337] Furthermore, "judgment (decision)" can be replaced with "assuming," "expecting," or "considering."

[0338] 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.”

[0339] 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, or optical domain (both visible and invisible).

[0340] 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."

[0341] 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.

[0342] 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.

[0343] 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 invention described herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined in the claims. Therefore, the descriptions herein are for illustrative purposes only and do not imply any limitation on the invention described herein.

Claims

1. A receiving unit that receives a first number, a second number, and information indicating the offset for each port used to transmit the measurement reference signal (SRS), Using the offset for each port, a control unit controls the transmission of the SRS in a second number of resource blocks (RBs) for each first number of resource blocks (RBs), A terminal.

2. The receiving unit further receives information indicating the offset for each symbol used for transmitting the SRS, The control unit controls the transmission of the SRS in a second number of RBs for every first number of RBs, using the offset for each port and the offset for each symbol. The terminal according to claim 1.

3. The receiving unit further receives information indicating a third number and information indicating a subcarrier level offset. The control unit uses the subcarrier level offset to control the transmission of the SRS in the second number of RBs, one subcarrier for every third number of subcarriers. The terminal according to claim 1 or claim 2.

4. The receiving unit further receives setting information indicating a third number, information indicating a subcarrier level offset, and information indicating an offset for each symbol used for transmitting the SRS. The control unit uses the subcarrier level offset and the symbol-level offset to control the transmission of the SRS in the second number of RBs, with one subcarrier for each third number of subcarriers. The terminal according to claim 1.

5. A step of receiving information indicating a first number, a second number, and an offset for each port used to transmit the measurement reference signal (SRS), A step of controlling the transmission of the SRS in a second number of resource blocks (RBs) for each first number of resource blocks (RBs) using the offset for each port, A wireless communication method for a terminal having [a certain feature].

6. A transmitting unit that transmits a first number, a second number, and information indicating the offset for each port used to receive the measurement reference signal (SRS), Using the offset for each port, a control unit controls the reception of the SRS in a second number of resource blocks (RBs) for each first number of resource blocks (RBs), A base station having

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