Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives an instruction for transmission using a physical uplink shared channel (PUSCH) having more than four layers; and a control unit that determines a transmission power ratio between a phase tracking reference signal (PTRS) and the PUSCH. According to one embodiment of the present disclosure, UL transmission using more than four antenna ports can be appropriately controlled.

Description

Technical Field

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

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

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

[0004] Prior art literature

[0005] Non-patent literature

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

[0007] Problems to be solved by the invention

[0008] In Rel.15 NR, up to 4 layers of uplink (UL) multi-input multi-output (MIMO) transmission are supported. For future NR, support for UL transmission with more than 4 layers is being studied to achieve higher spectrum efficiency. For example, for Rel.18 NR, maximum 6-rank transmission using 6 antenna ports, maximum 6 or 8-rank transmission using 8 antenna ports, etc. are being studied.

[0009] However, regarding UL transmission using more than 4 antenna ports, research has not yet progressed on how to determine the transmission power. For example, research has not yet progressed on the relationship between the transmission power of the phase tracking reference signal (PTRS) and the physical uplink shared channel (PUSCH). If this is not clarified, there is a concern that the increase in communication throughput will be suppressed.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of appropriately controlling UL transmission using more than 4 antenna ports.

[0011] Means for solving problems

[0012] A terminal according to one embodiment of the present disclosure includes: a receiving unit that receives an instruction to transmit using a physical uplink shared channel (PUSCH) of more than four layers; and a control unit that determines a transmission power ratio between a phase tracking reference signal (PTRS) and the PUSCH.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, UL transmission using more than four antenna ports can be appropriately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing an example of a table of precoding matrix W for single-layer (rank 1) transmission using 4 antenna ports when the transform precoder in Rel.16 NR is invalid.

[0016] Figure 2 This is a diagram showing an example of a table of precoding matrix W for 2-layer (rank 2) transmission using 4 antenna ports when the transform precoder in Rel.16 NR is invalid.

[0017] Figure 3This is a diagram showing an example of a table of precoding matrix W for 3-layer (rank 3) transmission using 4 antenna ports when the transform precoder in Rel.16 NR is invalid.

[0018] Figure 4 This is a diagram showing an example of a table of precoding matrix W for 4-layer (rank 4) transmission using 4 antenna ports when the transform precoder in Rel.16 NR is invalid.

[0019] Figure 5A This is a diagram showing an example of a table of precoding matrix W for single-layer (rank 1) transmission using 2 antenna ports in Rel.16 NR. Figure 5B This is a diagram showing an example of a table of precoding matrix W for 2-layer (rank 2) transmission using 2 antenna ports when transform precoding is invalid in Rel.16 NR.

[0020] Figure 6 This is a diagram showing an example of the correspondence between the precoding information and layer number field values ​​in Rel.16 NR, the layer number, and TPMI.

[0021] Figure 7 An example of the non-coherent precoding matrix W in which one port is selected is shown.

[0022] Figure 8 An example of the partial coherence precoding matrix W in which 2 ports are selected is shown.

[0023] 9A to 9C An example showing PC capabilities.

[0024] Fig. 10A as well as Fig. 10B This shows an example of the association between the PTRS port and the DMRS port.

[0025] Fig.11 An example of the power ratio of PUSCH to PTRS per layer and per RE is shown.

[0026] Fig.12 An example of the ratio of PT-RS EPRE to PDSCH EPRE per layer per RE for a PT-RS port is shown.

[0027] Fig.13 An example of the structure of multiple antenna ports involved in implementation #1 is shown.

[0028] Fig.14A as well as Fig. 14B An example of the structure of multiple antenna ports involved in Option 2 of Implementation #2 is shown.

[0029] Fig.15A as well as Fig. 15B An example of the structure of multiple antenna ports involved in Option 2 of Implementation #3 is shown.

[0030] Fig.16A as well as Fig. 16B An example of the structure of multiple antenna ports involved in Option 3 of Implementation #3 is shown.

[0031] Fig.17A as well as Fig. 17B An example of the structure of multiple antenna ports involved in Option 4 of Implementation #3 is shown.

[0032] Fig.18A as well as Fig.18B Another example of the structure of multiple antenna ports involved in Option 4 of Implementation #3 is shown.

[0033] Fig.19 An example of the power ratio of PUSCH to PTRS per layer per RE involved in Implementation #4 is shown.

[0034] Fig. 20 Another example of the power ratio of PUSCH to PTRS per layer per RE involved in implementation #4 is shown.

[0035] Fig.21 Another example of the power ratio of PUSCH to PTRS per layer per RE involved in implementation #4 is shown.

[0036] Fig. 22 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0037] Fig.23 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0038] Fig.24 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0039] Fig.25 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment.

[0040] Fig.26 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0041] (Control of SRS and PUSCH transmission)

[0042] In Rel.15 NR, a terminal (user terminal, User Equipment (UE)) may also receive information (SRS configuration information, for example, parameters in the "SRS-Config" of the RRC control element) for transmitting a reference signal for measurement (for example, a sounding reference signal (SRS)).

[0043] Specifically, the UE may also receive at least one of information related to one or more SRS resource sets (SRS resource set information, for example, "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, for example, "SRS-Resource" of the RRC control element).

[0044] One SRS resource set may also be associated with a specific number of SRS resources (or a specific number of SRS resources may be grouped). Each SRS resource may also be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0045] The SRS resource set information may also include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on the usage of the SRS.

[0046] Here, the SRS resource type may also represent any one of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic SRS (A-SRS). In addition, the UE may also periodically (or periodically after activation) send P-SRS and SP-SRS, and send A-SRS based on the SRS request of the DCI.

[0047] In addition, the purpose (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") can also be, for example, beam management (beamManagement), codebook (codebook (CB)), noncodebook (noncodebook (NCB)), antenna switching (switching), etc. SRS for codebook or non-codebook purposes can also be used to determine the precoder sent by the codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on SRI.

[0048] For example, in the case of codebook-based transmission, the UE may also determine the precoder (precoding matrix) for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI) and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0049] SRS resource information may also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), frequency hopping association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0050] The spatial relationship information of SRS (for example, "spatialRelationInfo" of RRC information element) may also indicate the spatial relationship information between a specific reference signal and SRS. The specific reference signal may also be at least one of a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a channel state information reference signal (CSI-RS), and an SRS (for example, other SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0051] The spatial relationship information of SRS may also include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the above-mentioned specific reference signal.

[0052] In addition, in the present disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSBRI) may also be overwritten with each other. In addition, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)) may also be overwritten with each other. In addition, the SRS index, SRS resource ID, and SRI may also be overwritten with each other.

[0053] The spatial relationship information of the SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned specific reference signal.

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

[0055] When other SRS (reference SRS) and spatial relationship information related to the SRS (target SRS) are set for a certain SRS (target SRS) resource, the UE may also use the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) used for transmitting the reference SRS to transmit the target SRS resource. That is, in this case, the UE may also assume that the UE transmission beam of the reference SRS is the same as the UE transmission beam of the target SRS.

[0056] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a specific field (e.g., SRS resource identifier (SRI) field) in the DCI (e.g., DCI format 0_1). Specifically, the UE may also use the spatial relationship information of the SRS resource determined based on the value of the specific field (e.g., SRI) (e.g., "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0057] In Rel.15 / 16 NR, when codebook-based transmission is used for PUSCH, the UE may also be configured with a SRS resource set with a maximum of 2 SRS resources for the purpose of the codebook through RRC, and may also be indicated one of the maximum 2 SRS resources through DCI (1-bit SRI field). The transmit beam of PUSCH is specified by the SRI field.

[0058] The UE may also determine the TPMI and the number of layers (transmission rank) for the PUSCH based on the precoding information and the number of layers field (hereinafter also referred to as the precoding information field). The UE may also select a precoder based on the TPMI, the number of layers, etc. from the uplink codebook for the same number of ports as the number of SRS ports indicated by "nrofSRS-Ports" of the high-level parameter, wherein the high-level parameter is a high-level parameter set for the SRS resource specified by the SRI field.

[0059] In Rel.15 / 16 NR, when non-codebook based transmission is used for PUSCH, the UE may be configured with a non-codebook SRS resource set having a maximum of 4 SRS resources through RRC, and may be indicated with one or more of the maximum 4 SRS resources through DCI (2-bit SRI field).

[0060] The UE may also determine the number of layers (transmission rank) used for the PUSCH based on the SRI field. For example, the UE may determine that the number of SRS resources specified by the SRI field is the same as the number of layers used for the PUSCH. In addition, the UE may also calculate the precoder of the SRS resources.

[0061] When the CSI-RS associated with the SRS resource (or the SRS resource set to which the SRS resource belongs) (also referred to as the associated CSI-RS) is set by the higher layer, the transmit beam of the PUSCH can also be calculated based on (the measurement of) the set associated CSI-RS. Otherwise, the transmit beam of the PUSCH can also be specified by the SRI.

[0062] In addition, the UE may also be configured to use codebook-based PUSCH transmission or non-codebook-based PUSCH transmission through a high-level parameter "txConfig" indicating a transmission scheme. This parameter may also indicate a value of "codebook" or "non-codebook".

[0063] In the present disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may also mean PUSCH when "codebook" is set as the transmission scheme in the UE. In the present disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may also mean PUSCH when "non-codebook" is set as the transmission scheme in the UE.

[0064] (Determination of PUSCH precoder in codebook (CB) transmission)

[0065] As described above, in the case of codebook (CB) based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI, TRI, TPMI, etc.

[0066] SRI, TRI, TPMI, etc. can also be notified to the UE using Downlink Control Information (DCI). SRI can be specified by the SRS Resource Indicator field (SRI field) of the DCI, or by the parameter "srs-ResourceIndicator" included in the RRC information element "ConfiguredGrantConfig" of the configured grant PUSCH (configured grant PUSCH).

[0067] TRI and TPMI may also be specified by the precoding information and number of layers field of the DCI. For simplicity, the precoding information and number of layers field is also referred to as the precoding information field.

[0068] The UE may also report UE capability information related to the precoder type, and the base station may set the precoder type based on the UE capability information through high-layer signaling. The UE capability information may also be information about the precoder type used by the UE in PUSCH transmission (for example, it may also be represented by the RRC parameter "pusch-TransCoherence").

[0069] The UE may also determine the precoder to be used for PUSCH transmission based on information on the precoder type (e.g., RRC parameter "codebookSubset") included in the PUSCH configuration information notified by higher layer signaling (e.g., the "PUSCH-Config" information element of RRC signaling). The UE may also be configured with a subset of the PMI specified by the TPMI through codebookSubset.

[0070] In addition, the precoder type can also be specified by any one of fully coherent (full coherent, fully coherent), partially coherent (partial coherent) and incoherent (non coherent, non coherent) or a combination of at least two of them (for example, it can also be represented by parameters such as "fully And Partial And Non Coherent" and "partial And Non Coherent").

[0071] For example, the RRC parameter "pusch-TransCoherence" indicating UE capability can also indicate full coherence, partial coherence, or non-coherence. In addition, the RRC parameter "codebookSubset" can also indicate "fully And Partial And Non-Coherent", "partial And Non-Coherent", or "non-Coherent".

[0072] Full coherence may also mean that all antenna ports used for transmission are synchronized (which may also be expressed as being able to make the phases consistent, being able to perform phase control for each coherent antenna port, being able to appropriately apply a precoder for each coherent antenna port, etc.). Partial coherence may also mean that some of the antenna ports used for transmission are synchronized, but these ports are not synchronized with other ports. Incoherence may also mean that the antenna ports used for transmission are not synchronized.

[0073] In addition, it is also conceivable that a UE supporting a fully coherent precoder type supports a partially coherent and incoherent precoder type. It is also conceivable that a UE supporting a partially coherent precoder type supports an incoherent precoder type.

[0074] In the present disclosure, precoder type, coherency, PUSCH transmission coherence, coherent type, coherent type, codebook type, codebook subset, codebook subset type, etc. may also be replaced with each other.

[0075] The UE may determine a precoding matrix corresponding to the TPMI index obtained from the DCI (eg, DCI format 0_1, the same below) scheduled for UL transmission from a plurality of precoders (which may also be referred to as precoding matrices, codebooks, etc.) used for CB-based transmission.

[0076] Figure 1 This is a diagram showing an example of the relationship between codebook subsets and TPMI indexes. Figure 1 A table corresponding to the precoding matrix W for single-layer (rank 1) transmission using 4 antenna ports when transform precoding (may also be referred to as transform precoder) is invalid in Rel.16 NR. Figure 1 The corresponding W is shown in ascending order of TPMI index from left to right ( Figure 2 Same thing).

[0077] like Figure 1 The correspondence relationship between the TPMI index and the corresponding W (which may also be referred to as a table) is also referred to as a codebook. A part of the codebook is also referred to as a codebook subset.

[0078] exist Figure 1In the case where the codebook subset (codebookSubset) is fully, partially and non-coherent (fullyAndPartialAndNonCoherent), the UE is notified of one TPMI (TPMI index: TPMI index) from 0 to 27 for single-layer transmission. In addition, when the codebook subset is partialAndNonCoherent, the UE is set to one TPMI from 0 to 11 for single-layer transmission. When the codebook subset is non-coherent (nonCoherent), the UE is set to one TPMI from 0 to 3 for single-layer transmission.

[0079] exist Figure 1 In the case where TPMIs from 0 to 3 are notified, a non-coherent precoder is applied. In the case where TPMIs from 4 to 11 are notified, a partially coherent precoder is applied. In the case where TPMIs from 12 to 27 are notified, a fully coherent precoder is applied.

[0080] Figure 2 Each of these corresponds to a table of precoding matrix W for 2-4 layer (rank 2-4) transmission using 4 antenna ports when transform precoding is invalid in Rel.16 NR.

[0081] according to Figure 2 The TPMI notified to the UE for layer 2 transmission is from 0 to 21 (codebook subset is full, partial and incoherent), from 0 to 13 (codebook subset is partial and incoherent) or from 0 to 5 (codebook subset is incoherent).

[0082] according to Figure 3 The TPMI notified to the UE for layer 3 transmission is from 0 to 6 (codebook subset is full, partial and incoherent), from 0 to 2 (codebook subset is partial and incoherent) or 0 (codebook subset is incoherent).

[0083] according to Figure 4 The TPMI notified by the UE for 4 layers is from 0 to 4 (codebook subset is complete, partial and incoherent), from 0 to 2 (codebook subset is partial and incoherent) or 0 (codebook subset is incoherent).

[0084] Figure 5A This table corresponds to the precoding matrix W for single-layer (rank 1) transmission using 2 antenna ports in Rel.16 NR. Figure 5B This table corresponds to the precoding matrix W for 2-layer (rank 2) transmission using 2 antenna ports when transform precoding is invalid in Rel.16 NR.

[0085] according to Figure 5A , the TPMI notified to the UE for 2-port single-layer transmission is from 0 to 5 (codebook subset is full, partial and incoherent) or from 0 to 1 (codebook subset is incoherent). In the case where the notified TPMI is from 0 to 1, an incoherent precoder is applied. In the case where the notified TPMI is from 2 to 5, a fully coherent precoder is applied.

[0086] according to Figure 5B , the TPMI notified to the UE for 2-port 2-layer transmission is from 0 to 2 (codebook subset is full, partial and incoherent) or 0 (codebook subset is incoherent).

[0087] In addition, a precoding matrix having only one non-zero element in each column may also be referred to as a non-coherent codebook. A precoding matrix having only a specific number (greater than 1, but not all the elements in the column) of non-zero elements in each column may also be referred to as a partially coherent codebook. A precoding matrix having all non-zero elements in each column may also be referred to as a fully coherent codebook.

[0088] Non-coherent codebooks and partially coherent codebooks may also be referred to as antenna selection precoders, antenna port selection precoders, etc. For example, non-coherent codebooks (non-coherent precoders) may also be referred to as 1-port selection precoders, 1-port port selection precoders, etc. In addition, partially coherent codebooks (partially coherent precoders) may also be referred to as x-port (x is an integer greater than 1) selection precoders, x-port port selection precoders, etc. Fully coherent codebooks may also be referred to as non-antenna selection precoders, full-port precoders, etc.

[0089] In addition, in the present disclosure, the partially coherent codebook may also correspond to a codebook (precoding matrix) corresponding to the TPMI specified by DCI for codebook-based transmission for a UE with a partially coherent codebook subset set (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent"), except for the codebook corresponding to the TPMI specified for a UE with a non-coherent codebook subset set (for example, RRC parameter "codebookSubset" = "nonCoherent") (that is, if it is a single-layer transmission with 4 antenna ports, then the codebook with TPMI=4 to 11).

[0090] In addition, in the present disclosure, a fully coherent codebook may also correspond to a codebook (precoding matrix) corresponding to the TPMI specified by DCI for codebook-based transmission for a UE to which a fully coherent codebook subset is set (for example, RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent") is set, except for the codebook corresponding to the TPMI specified for a UE to which a partially coherent codebook subset is set (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent") is set (that is, if it is a single-layer transmission with 4 antenna ports, then the codebook with TPMI = 12 to 27).

[0091] In addition, from Figure 5A as well as Figure 5B It can be seen that since there is no partially coherent precoder for 2-antenna port transmission, the partial and incoherent settings of the codebook subset may not be applied to the 2-antenna port.

[0092] (Precoding information field)

[0093] As described above, the UE may also determine the TPMI and the number of layers (transmission rank) used for the PUSCH based on the precoding information field of the DCI (eg, DCI format 0_1 / 0_2) that schedules the PUSCH.

[0094] Regarding the codebook-based PUSCH, the number of bits of the precoding information field can also be determined (and can also be changed) based on the effective or invalid setting of the transform precoder for PUSCH (for example, the high-level parameter transformPrecoder), the setting of the codebook subset for PUSCH (for example, the high-level parameter codebookSubset), the setting of the maximum number of layers for PUSCH (for example, the high-level parameter maxRank), the setting of the uplink full-power transmission for PUSCH (for example, the high-level parameter ul-FullPowerTransmission), the number of antenna ports for PUSCH, etc.

[0095] Figure 6This is a diagram showing an example of the correspondence between the field values ​​of precoding information and the number of layers and the number of layers and TPMI in Rel.16 NR. The correspondence in this example is for 4 antenna ports when the transform precoder is set to invalid, the maximum rank (maxRank) is set to 2, 3 or 4, and the uplink full power transmission is not set or is set to full power mode 2 (fullpowerMode2) or is set to full power (fullpower), but it is not limited to this. In addition, those skilled in the art can certainly understand that the "bit field mapped to the index" shown in the figure represents the field value of the precoding information and the number of layers.

[0096] exist Figure 6 In the precoding information field, when a fully And Partial And Non Coherent codebook subset is set for the UE, the precoding information field is 6 bits, when a partially coherent codebook subset is set, the precoding information field is 5 bits, and when a non-coherent codebook subset is set, the precoding information field is 4 bits.

[0097] In addition, if Figure 6 As shown, the number of layers and TPMI corresponding to the value of a certain precoding information field may also be the same (common) regardless of the codebook subset configured for the UE. Figure 6 In the example, the number of layers represented by the value of the precoding information field = 0-11 and the TPMI are the same for the codebook subsets of fully coherent (ffullyAndPartialAndNonCoherent), partially coherent (partialAndNonCoherent) and non-coherent. Figure 6 It may also be that the number of layers represented by the value of the precoding information field = 0-31 and the TPMI are the same for the codebook subsets of fully And Partial And Non Coherent and partial And Non Coherent.

[0098] In addition, for non-codebook-based PUSCH, the precoding information field may be 0 bits. In addition, for codebook-based PUSCH of one antenna port, the precoding information field may be 0 bits.

[0099] (Transmission using more than 4 antenna ports)

[0100] In Rel.15 / 16 NR, up to 4 layers of uplink (UL) multi-input multi-output (MIMO) transmission are supported. For future wireless communication systems, support for UL transmission with more than 4 layers is being studied to achieve higher spectrum efficiency. For example, for Rel.18 NR, the maximum 6-rank transmission using 6 antenna ports and the maximum 6 or 8-rank transmission using 8 antenna ports are being studied.

[0101] In addition, a precoding matrix for UL transmission using more than 4 antenna ports (the number of antenna ports is greater than 4) is being studied. For example, a codebook for 8-port transmission (which may also be referred to as an 8-transmission UL codebook (8 TX UL codebook: 8 TX UL codebook, etc.) is being studied.

[0102] Non-coherent codebooks from 1 layer to 8 ports can also be used.

[0103] Figure 7 An example of the non-coherent precoding matrix W in which one port is selected is shown.

[0104] By supporting multiple port selection precoding matrices, it is possible to switch the transmission antenna. However, it is not necessary to support all of the aforementioned 8 precoding matrices. It is also possible to support only 2 matrices among the 8 precoding matrices.

[0105] In addition, the 8-port precoding matrix (precoder) in the present disclosure is scaled (adjusted) so that the coefficient (or the absolute value of each component) is 1 / √8 (or a specific value), but is not limited thereto.

[0106] Partially coherent codebooks from 1 layer to 8 ports can also be used.

[0107] Figure 8 An example of a partially correlated precoding matrix W for selecting 2 ports. The codebook may also select x ports (1 < x < 8). When the initial port is selected, the value of the element for that port may also be 1. The value of the element for each selected port other than the initial port may also be one of {1, j, -1, -j}. The number of possible combinations of selected x ports may also be M. For 2-port selection, M=C8 may also be used. 2 =28. For 4-port selection, it can also be M=C8 4 =70. For 6-port selection, it can also be M=C8 6 =28. Considering the 4 possible phases {1, j, -1, -j} for each port except the initial port, the number of possible combinations of the codebook can also be M 4(x-1).

[0108] Alternatively, one or more UE coherence assumptions (UE coherence capabilities) and one or more codebook subset settings may be applied to 8 transmitted UL codebooks.

[0109] For 8 ports, "pusch-TransCoherence", "codebookSubset", etc., which are existing RRC parameters (or UE capabilities), may also be used. For example, for 8 ports, the UE may also determine the TPMI index for the 8-transmission UL codebook based on nonCoherent, partialCoherent, fullCoherent, "partialAndNonCoherent", "fullyAndPartialAndNonCoherent", etc.

[0110] For 8 ports, new RRC parameters (or UE capabilities) may also be used. For example, the UE may also report to the network (e.g., base station) capability information indicating support for full / partial / incoherent capability below a specific number of ports, and may also be set to indicate the use of full / partial / incoherent codebook subsets for transmission below a specific number of ports.

[0111] Furthermore, for the eight ports, information indicating which port is correlated with which port (or which port is used as correlated with which port) may be reported from the UE or may be set for the UE.

[0112] In addition, for 8 ports, a UE supporting partial coherence (having partial coherence capability) may also send information (included in capability information) about which antenna port combination is coherent. This information may also be referred to as coherence information, coherent port information, etc.

[0113] The relevant port information may also be a bitmap of the size of the port number, for example, it may also mean that the ports corresponding to the bits of '1' (or '0') are relevant to each other.

[0114] The coherent port information may also be information related to a coherent group. Here, a coherent group may also include X (X is an integer greater than 1) coherent ports. The information related to a coherent group may indicate that a coherent group includes X ports, or may indicate the port number (port index) of each of the X coherent ports included in a coherent group.

[0115] The UE may also report UE capability information associated with one or more coherent groups to the network.

[0116] The antennas included in a certain coherent group are independent of the antennas included in other coherent groups.

[0117] In addition, one coherence group may be further divided into a plurality of coherence groups. By classifying the coherence groups in this way, it is expected that flexible control can be realized.

[0118] In the present disclosure, “having the capability of a coherent group” may be replaced with “having the capability of supporting a coherent group”, “being able to utilize a coherent group”, etc.

[0119] The above 8-transmission UL codebook for PUSCH may also be used when at least one of the following conditions is met:

[0120] When the transform precoder for PUSCH is set to invalid for the UE,

[0121] When more than 4 ports (for CB-based PUSCH) are configured for PUSCH / SRS for the UE via RRC,

[0122] · A case where more than 4 ports (for CB-based PUSCH) are configured / activated / specified for the UE via RRC / MAC CE / DCI for PUSCH / SRS.

[0123] The number of ports used in the precoding matrix can also be semi-statically set through RRC. In addition, fallback (or switching) from using a precoding matrix with more than 4 ports to using a precoding matrix with less than 4 ports can also be performed dynamically through MAC CE / DCI.

[0124] In addition, the UE may use (refer to) a common 8-transmission UL codebook regardless of the antenna layout (antenna configuration). In addition, the UE may use (refer to) a different 8-transmission UL codebook for each antenna layout (antenna configuration).

[0125] The UE may also report UE capability information related to the antenna layout. The base station may also, for example, send information specifying / determining / setting the 8-bit UL codebook to be used by the UE based on the UE capability information. The UE may also determine the 8-bit UL codebook to be used based on the reported UE capability information and the received information specifying / determining / setting the 8-bit UL codebook.

[0126] In the present disclosure, relevant port information, UE capability information related to antenna layout, etc. may also be referred to as antenna capability information.

[0127] In a UE reporting capability information for 8Tx partial coherence, more than one UE antenna coherence capability may also be supported or reported. Antenna ports (number of antenna ports or antenna port index) in each coherence group may also be reported. Fig.9A In the example of , partial coherence capability #0 supports coherence groups with 4 ports and coherence groups with 4 ports. Fig. 9B In the example of FIG. 1 , partial coherence capability #1 supports coherence groups with 4 ports, coherence groups with 2 ports, and coherence groups with 2 ports. Fig. 9C In the example, partial coherence capability #2 supports 4 coherence groups with 2 ports each.

[0128] (Association between PTRS ports and DMRS ports)

[0129] The association between the PTRS port and the DMRS port is indicated by the PTRS-DMRS association field in the DCI. In Rel.16 / 17 PUSCH, up to two UL PTRS ports are supported. In the case of one PTRS port being configured, the PTRS-DMRS association is used Fig. 10A Indicated by the PTRS-DMRS association field. In the case of two PTRS ports being configured, the PTRS-DMRS association uses Fig. 10B It is indicated by the PTRS-DMRS association field.

[0130] In the case where two PTRS ports are configured, the “DMRS port sharing the PTRS port” may also follow the following:

[0131] · PUSCH antenna ports 1000 and 1002 within the indicated TPMI share PTRS port 0. PUSCH antenna ports 1001 and 1003 within the indicated TPMI share PTRS port 1. UL PTRS port 0 is associated with UL layer 'x' within multiple layers transmitted using PUSCH antenna ports 1000 and 1002 within the indicated TPMI. UL PTRS port 1 is associated with UL layer 'y' within multiple layers transmitted using PUSCH antenna ports 1001 and 1003 within the indicated TPMI. Here, 'x' and / or 'y' are given by the DCI parameter PTRS-DMRS association shown in DCI format 0_1 ​​and DCI format 0_2.

[0132] [example]

[0133] For TPMI, layers 0 / 1 / 2 / 3 are transmitted using PUSCH antenna ports 1000 / 1001 / 1002 / 1003 respectively, DMRS ports for layers 0 / 2 share PTRS port 0, and DMRS ports for layers 1 / 3 share PTRS port 1.

[0134] (Transmit power ratio between PTRS and PUSCH)

[0135] When the UE is in UL with Q P ={1,2} PTRS ports are scheduled, and the number of scheduled layers is n layer PUSCH When the UE is

[0136] When the UE-associated higher layer parameter ptrs-Power (UL-PTRS-power) is set, the power ratio of PUSCH to PTRS per layer per RE is ρ PTRS PUSCH By PTRS PUSCH =-α PTRS PUSCH [dB] is given. Here, α PTRS PUSCH According to the high-level parameter ptrs-Power Fig.11 The table (correlation) is represented by the PTRS scaling factor β PTRS Through Beta PTRS =10^(-ρ PTRS PUSCH / 20) and the field 'Precoding Information and Number of Layers' in the DCI for precoding information and the number of layers are given.

[0137] When the ptrs-Power in the PTRS-Config is not set, or in the case of non-codebook based PUSCH, the UE assumes that the ptrs-Power in the PTRS-Config is set to the state '00' in the table.

[0138] In full coherence, the PTRS port number is always 1.

[0139] One PTRS port is passed (port number Layers = 1) precoding matrix is ​​precoded. PUSCH of X layers is passed through (number of ports The number of layers) of precoding matrices are precoded. Therefore, the transmission power ratio of PTRS per RE per layer to PUSCH is 10log 10(Number of PUSCH layers) [dB].

[0140] In non-coherent, the number of PTRS ports is 1 or 2.

[0141] In the case of UL-PTRS-power = "00", the PTRS port borrows power from different REs of the same layer (REs for PTRS on different ports). In the case where the number of PTRS ports is 1, no power increase is performed. Otherwise, in the case where the number of PTRS ports is 2, the REs for PTRS on other ports are muted and their power is borrowed.

[0142] In the case of UL-PTRS-power = "01", the PTRS port borrows power from the same RE in different layers. Therefore, the transmit power ratio of PTRS per RE per layer to PUSCH always supports 10log 10 (Number of PUSCH layers) [dB].

[0143] In partial coherence, the number of PTRS ports is 1 or 2.

[0144] In the case of UL-PTRS-power = "00", a combination of two power borrowing (utilization) methods is used. These two methods are to borrow power from different REs of the same layer (REs for PTRS on different ports), and to borrow power from the same REs of different layers (outside the coherent group). For 4-layer PUSCH, two coherent groups are considered. In the case where the number of PTRS ports is 1, the PTRS port borrows power from the same REs on different layers within its coherent group. That is, the transmit power ratio of PTRS per RE per layer to PUSCH is 10log 10 (Number of PUSCH layers in the coherent group) [dB]. Otherwise, when the number of PTRS ports is 2, power is borrowed from the same RE on different layers in its coherent group, and power is borrowed from different REs in the same layer, which are used for PTRS on other layers. That is, the transmit power ratio of PTRS per RE per layer to PUSCH is 10log 10 {(Number of PUSCH layers in a coherent group) (number of PTRS ports)}[dB].

[0145] In the case of UL-PTRS-power = "01", the PTRS port borrows power from the same RE in different layers. Therefore, the transmit power ratio of PTRS per RE per layer to PUSCH always supports 10log 10 (Number of PUSCH layers) [dB].

[0146] (DL power allocation)

[0147] In DL power allocation, by making the power of the reference signal (RS) higher than the power of other channels, channel estimation and detection can be made simpler and more accurate. In addition, in order to avoid power fluctuations in the receiver (UE), it is preferred that all OFDM symbols are transmitted with a constant power.

[0148] In Rel.15 NR, the UE assumes that the PDSCH demodulation reference signal (DM-RS, DL DM-RS) is mapped to the physical resource in accordance with the DM-RS configuration type 1 or configuration type 2 given by the higher-level parameter dmrs-Type. The UE assumes that the sequence r(m) of the PDSCH DM-RS is mapped by a factor β PDSCH DMRS is scaled to comply with the specified transmit power. This scaling is done by multiplying the sequence r(m) by a factor β PDSCH DMRS .

[0149] For the DM-RS associated with the PDSCH, the UE may also consider the ratio of PDSCH EPRE (energy per resource element) to the energy per resource element of the DM-RS (energy perresource element (EPRE)) (ratio of PDSCH EPRE to DM-RS EPRE, ratio of PDSCH EPRE to DM-RS EPRE) β DMRS [dB] Given from the table specified in the specification, following the number of data-free DM-RS code division multiplexing (CDM) groups. DM-RS scaling factor (amplitude ratio) β PDSCH DMRS By 10^(-β DMRS / 20) is given. According to the table of the specification, for example, when the number of DM-RS CDM groups without data is 2, regardless of the DM-RS setting type, β DMRS is -3dB, β PDSCH DMRS is approximately root 2, so the amplitude of the DM-RS is scaled approximately by root 2 (the power of the DM-RS is scaled approximately by 2).

[0150] In Rel.15 NR, only when the higher layer parameters (phaseTrackingRS in DMRS configuration information (DMRS-DownlinkConfig) for PDSCH) indicate the use of phase tracking reference signal (phase-tracking reference signal (PT-RS), DL PT-RS), the UE assumes that PT-RS only exists in the resource block (RB) used for PDSCH. In the case of PT-RS, the UE assumes that the PDSCH PT-RS is adjusted by factor β PT-RS,i is scaled to comply with the specified transmit power. This scaling is done for the sequence r k Multiply by factor β PT-RS,i .

[0151] When a UE is scheduled using a PT-RS port (PT-RS antenna port) associated with a PDSCH, and when the higher layer parameter epre-Ratio is configured for the UE, the ratio of PT-RS EPRE to PDSCH EPRE per layer per RE for PT-RS port (ratio of PT-RS EPRE to PDSCH EPRE per layer per RE for PT-RS port) ρ PTRS From the table specified in the specification ( Fig.12 ), following the epre-Ratio is given, the PT-RS scaling factor (amplitude ratio) β PTRS (β PT-RS,i ) through 10^(ρ PTRS / 20) is given. If the UE is not configured with epre-Ratio, it is assumed that epre-Ratio is set to state '0'. According to the table in the specification, for example, when the number of PDSCH layers is 2 and epre-Ratio is 0, ρ PTRS is 3dB, β PTRS is approximately root 2, so the amplitude of PT-RS is scaled approximately by root 2 (the power of PT-RS is scaled approximately by 2).

[0152] In UL transmission with more than 4 layers, the transmission power ratio between PTRS and PUSCH for full / partial / non-coherent is unclear. If such a transmission power ratio is unclear, there is a concern that communication quality may be degraded.

[0153] Therefore, the inventors of the present invention have conceived a method for determining the transmission power ratio between PTRS and PUSCH for full / partial / incoherent transmission in UL transmission with more than four layers.

[0154] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0155] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C".

[0156] In the present disclosure, notification, activation, deactivation, indication (or designation), selection, configuration, update, determination, etc. may also be mutually rewritten. In the present disclosure, support, control, controllable, operation, and operationable may also be mutually rewritten.

[0157] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, high-layer parameters, fields, Information Element (IE), settings, etc. may also be overwritten with each other. In the present disclosure, Medium Access Control (MAC) control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc. may also be overwritten with each other.

[0158] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0159] In the present disclosure, MAC signaling may also use, for example, MAC Control Element (MACCE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0160] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0161] In the present disclosure, an index, an identifier (ID), an indicator, a resource ID, etc. may also be overwritten with each other. In the present disclosure, a sequence, a list, a set, a group, a cluster, a subset, etc. may also be overwritten with each other.

[0162] The number of layers of PUSCH transmission in the following embodiments may be greater than 4 or less than 4. For example, the PUSCH transmission of two CWs in the present disclosure may also be performed with a number of layers less than 4 (e.g., 2). In addition, the maximum number of layers is not limited to more than 4, and may also be applied to less than 4. In addition, the example of 8 layers of PUSCH transmission may also be applied to 5 / 6 / 7 layers.

[0163] Furthermore, the transmission (UL transmission, PUSCH transmission) in the following embodiments may be based on the premise of using a plurality of panels, or may not be based on the premise (it may also be applied regardless of the panels).

[0164] In addition, in the present disclosure, “having the ability to…” may be replaced with “the ability to support / report…”.

[0165] In the present disclosure, fully coherent and FC can also be overwritten with each other. In the present disclosure, partially coherent and PC can also be overwritten with each other. In the present disclosure, incoherent and NC can also be overwritten with each other.

[0166] In the present disclosure, coherence group, antenna coherence group, antenna port group, antenna port group, and antenna port set can also be rewritten mutually.

[0167] In the present disclosure, precoders, precoding matrices, W, and codebooks may also be replaced with each other. In the present disclosure, ports, antenna ports, layers, and antennas may also be replaced with each other.

[0168] In the present disclosure, the transmit power ratio of PUSCH to PTRS is 1 / a (linear value), the transmit power ratio of PUSCH to PTRS is 10log 10 (1 / a) [dB], PTRS to PUSCH transmit power ratio a (linear value), PTRS to PUSCH transmit power ratio 10log 10 a[dB] can also be rewritten. In the present disclosure, the transmission power ratio of PUSCH to PTRS is ρ PTRS PUSCH [dB], factor related to the transmit power ratio of PUSCH to PTRS - α PTRS PUSCH [dB] can also be rewritten.

[0169] In the present disclosure, a port borrows power from other ports, a port utilizes power from other ports, and a port reallocates power from other ports may also be rewritten to each other.

[0170] (Wireless Communication Method)

[0171] The UE may also receive a configuration / indication for transmission using more than 4 layers of PUSCH. The UE may also determine the transmission power ratio between PTRS and PUSCH.

[0172] <Implementation method #1>

[0173] This embodiment deals with a fully coherent situation.

[0174] In fully coherent UL transmission with X (X>4) layers, the transmit power ratio of PUSCH to PTRS can also be 1 / X in linear terms. The linear value 1 / X can also be rewritten as 10log 10 (1 / X) [dB].

[0175] exist Fig.13 In the example of , fully coherent 8 antenna ports are used for UL transmission, one of which is a PTRS port, and the rest are non-PTRS ports. In this case, it can also be that PUSCH transmit power / PTRS transmit power=1 / 8.

[0176] According to this embodiment, the UE can appropriately determine the transmission power ratio of PTRS and PUSCH even when using a fully coherent precoder for more than 4 layers.

[0177] <Implementation Method #2>

[0178] The present embodiment deals with the incoherent case.

[0179] In fully coherent UL transmission with X (X>4) layers, the transmit power ratio of PUSCH to PTRS may also be any of the following options.

[0180] [Option 1]

[0181] The transmission power ratio can also be 1 / X in linear terms. The linear value 1 / X can also be rewritten as 10log 10 (1 / X) [dB].

[0182] [Option 2]

[0183] The transmit power ratio may also depend on the number of PTRS ports.

[0184] [[example]]

[0185] The transmission power ratio of PUSCH to PTRS may also be 1 / the number of PTRS ports.

[0186] When the number of PTRS ports is 1, the transmission power ratio of PUSCH to PTRS may also be 1. When the number of PTRS ports is 2, the transmission power ratio of PUSCH to PTRS may also be 2.

[0187] exist Fig.14A In the example, 8 non-coherent antenna ports are used for UL transmission, one of the antenna ports is a PTRS port, and the rest are non-PTRS ports. In this case, PUSCH transmission power / PTRS transmission power=1 may also be used.

[0188] exist Fig. 14B In the example, 8 non-coherent antenna ports are used for UL transmission, two of which are PTRS ports and the rest are non-PTRS ports. In this case, PUSCH transmission power / PTRS transmission power = 1. Assuming that the two PTRS ports use different REs, the power of one PTRS port can also be increased by silencing the REs used by other PTRS ports.

[0189] According to this embodiment, the UE can appropriately determine the transmission power ratio of PTRS and PUSCH even when using a non-coherent precoder for more than 4 layers.

[0190] <Implementation Method #3>

[0191] This embodiment deals with a partially coherent situation.

[0192] In fully coherent UL transmission with X (X>4) layers, the transmit power ratio of PUSCH to PTRS may also be any of the following options.

[0193] [Option 1]

[0194] The transmission power ratio can also be 1 / X in linear terms. The linear value 1 / X can also be rewritten as 10log 10 (1 / X) [dB].

[0195] [Option 2]

[0196] The transmit power ratio may also depend on the number of PTRS ports and the number of coherence groups.

[0197] [[example]]

[0198] Alternatively, the number of coherent groups is 2, and the number of antenna ports in each coherent group is 4.

[0199] In the case of multiple coherent groups with the same number of antenna ports in each coherent group, the transmission power ratio of PUSCH to PTRS may also be 1 / (the number of PTRS ports of the PUSCH layer of each coherent group).

[0200] When the number of PTRS ports is 1, the transmit power ratio of PUSCH to PTRS may also be 1 / 4 = 0.25, and when the number of PTRS ports is 2, the transmit power ratio of PUSCH to PTRS may also be 1 / 8 = 0.125. Since one PTRS port per coherent group is sufficient, for two coherent groups, there may be no need to specify more than two PTRS ports.

[0201] exist Fig.15A In the example, partially coherent 8 antenna ports are used for UL transmission, the number of coherent groups is 2, the number of antenna ports in each coherent group is 4, and there is one PTRS port in a coherent group. In this case, it can also be that PUSCH transmission power / PTRS transmission power = 1 / 4. The PTRS port can also use the unused power of the non-PTRS ports in the same coherent group in the PTRS transmission codeword. The PTRS port can also not use the unused power of the non-PTRS ports in different coherent groups in the PTRS transmission codeword.

[0202] exist Fig. 15BIn the example, partially coherent 8 antenna ports are used for UL transmission, the number of coherent groups is 2, the number of antenna ports in each coherent group is 4, and there is one PTRS port in each coherent group. In this case, it can also be that PUSCH transmit power / PTRS transmit power = 1 / 8. The PTRS port can also use the unused power of non-PTRS ports in the same coherent group in the PTRS transmit codeword. The PTRS port can also not use the unused power of non-PTRS ports in different coherent groups in the PTRS transmit codeword. Assuming that two PTRS ports use different REs from each other, the power of one PTRS port can also be increased by silencing the REs used by other PTRS ports.

[0203] [Option 3]

[0204] The transmit power ratio may also depend on the number of PTRS ports and the number of coherence groups.

[0205] [[example]]

[0206] Alternatively, the number of coherent groups is 4, and the number of antenna ports in each coherent group is 2.

[0207] In the case of multiple coherent groups with the same number of antenna ports in each coherent group, the transmission power ratio of PUSCH to PTRS may also be 1 / (the number of PTRS ports of the PUSCH layer of each coherent group).

[0208] When the number of PTRS ports is 1, the transmit power ratio of PUSCH to PTRS may also be 1 / 2 = 0.5, and when the number of PTRS ports is 2, the transmit power ratio of PUSCH to PTRS may also be 1 / 4 = 0.25. Since one PTRS port per coherent group is sufficient, for two coherent groups, there may be no need to specify more than two PTRS ports.

[0209] exist Fig.16A In the example, partially coherent 8 antenna ports are used for UL transmission, the number of coherent groups is 4, the number of antenna ports in each coherent group is 2, and there is one PTRS port in a coherent group. In this case, it can also be that PUSCH transmit power / PTRS transmit power = 1 / 2. The PTRS port can also use the unused power of the non-PTRS ports in the same coherent group in the PTRS transmit codeword. The PTRS port can also not use the unused power of the non-PTRS ports in different coherent groups in the PTRS transmit codeword.

[0210] exist Fig. 16BIn the example, partially coherent 8 antenna ports are used for UL transmission, the number of coherent groups is 4, the number of antenna ports in each coherent group is 2, and there is one PTRS port in each of the two coherent groups. In this case, it can also be that PUSCH transmit power / PTRS transmit power = 1 / 4. The PTRS port can also not use the unused power in the non-PTRS ports in different coherent groups in the PTRS transmit codeword. Assuming that two PTRS ports use different REs, one PTRS port can also increase the power by silencing the REs used by other PTRS ports.

[0211] [Option 4]

[0212] The transmit power ratio may also depend on the number of PTRS ports, the number of coherence groups, and the number of ports within each coherence group.

[0213] [[example]]

[0214] Alternatively, the number of coherent groups is 3, one coherent group is accompanied by 4 PUSCH layers (PUSCH antenna ports), and the other 2 coherent groups are accompanied by 2 PUSCH layers (PUSCH antenna ports).

[0215] The transmit power ratio of PUSCH to PTRS can also be 1 / (number of PTRS ports) in a linear value. Number of PTRS ports in the PUSCH layer of each coherence group).

[0216] When the number of PTRS ports is 1, the transmission power ratio of PUSCH to PTRS may be at least one of the following situations.

[0217] [[[Scenario 1-1]]]

[0218] When a PTRS port is associated with an antenna port in a coherent group with more antenna ports, its transmission power ratio may also follow the same rule as in the case of one PTRS port in Option 2.

[0219] [[[Scenario 1-2]]]

[0220] In the case where a PTRS port is associated with an antenna port in a coherent group with fewer antenna ports, its transmit power ratio may also follow the same rules as the case of one PTRS port in Option 3.

[0221] Alternatively, only a specific coherent group is associated with the PTRS port. For example, the specific coherent group may be a coherent group with more antenna ports or a coherent group with the most antenna ports. Here, the number of more antenna ports may be 4 or other numbers.

[0222] When the number of PTRS ports is 2, the transmit power ratio of PUSCH to PTRS may also depend on which coherent group shares the PTRS port.

[0223] [[[Scenario 2-1]]]

[0224] When two PTRS ports are associated with antenna ports in a coherent group with fewer antenna ports, their transmit power ratio may also follow the same rule as the case of two PTRS ports in Option 3. Here, the number of fewer antenna ports may be 2 or any other number.

[0225] [[[Scenario 2-2]]]

[0226] When one of the two PTRS ports is associated with an antenna port in a coherent group with more antenna ports, one of the following two methods may be considered: Here, the more antenna ports may be 4 or any other number.

[0227] Method 1

[0228] The transmit power ratio may also be different for each PTRS port. For example, the transmit power ratio of PUSCH to PTRS may be 1 / (number of PTRS ports). The number of PUSCH layers in a coherent group sharing a PTRS port).

[0229] Method 2

[0230] For two PTRS ports, the transmit power ratio may also be the same. For example, the transmit power ratio of PUSCH to PTRS may also be 1 / (number of PTRS ports) Maximum / minimum number of PUSCH layers within a coherent group sharing a PTRS port).

[0231] Alternatively, only specific coherence groups may be associated with PTRS ports. For example, multiple PTRS ports may be associated with antenna ports in different coherence groups, one of which includes a greater number of antenna ports. For example, multiple PTRS ports may be associated with antenna ports in different coherence groups, which include more of the same number of antenna ports.

[0232] When the number of PTRS ports is more than 2, the transmit power ratio of PUSCH to PTRS can also be 1 / (number of PTRS ports) in a linear value. Number of PTRS ports of the PUSCH layer of each coherent group). Since one PTRS port per coherent group is sufficient, for two coherent groups, no more than two PTRS ports may be specified.

[0233] exist Fig.17A In the example of , partially coherent 8 antenna ports are used for UL transmission, the number of coherent groups is 3, one coherent group includes 4 antenna ports, each of the 2 coherent groups includes 2 antenna ports, and one coherent group including 4 antenna ports includes 1 PTRS port. The PTRS port can also use the unused power of the non-PTRS port in the same coherent group in the PTRS transmission codeword. The PTRS port can also not use the unused power of the non-PTRS port in different coherent groups in the PTRS transmission codeword.

[0234] exist Fig. 17B In the example of , partially coherent 8 antenna ports are used for UL transmission, the number of coherent groups is 3, one coherent group includes 4 antenna ports, each of the 2 coherent groups includes 2 antenna ports, and one coherent group including 2 antenna ports includes one PTRS port. The PTRS port may also not utilize the power not used by the non-PTRS ports in the same coherent group in the PTRS transmission codeword.

[0235] exist Fig.18A In the example of , partially coherent 8 antenna ports are used for UL transmission, the number of coherent groups is 3, one coherent group includes 4 antenna ports, each of the 2 coherent groups includes 2 antenna ports, one coherent group including 4 antenna ports includes one PTRS port, and one coherent group including 2 antenna ports includes one PTRS port. The PTRS port can also use the unused power of the non-PTRS ports in the same coherent group in the PTRS transmission codeword. The PTRS port can also not use the unused power of the non-PTRS ports in different coherent groups in the PTRS transmission codeword.

[0236] exist Fig.18B In the example of , partially coherent 8 antenna ports are used for UL transmission, the number of coherent groups is 3, each of the 2 coherent groups includes 2 antenna ports, one coherent group includes 4 antenna ports, and each coherent group including 2 antenna ports includes a PTRS port. The PTRS port can also not utilize the power that is not used in the non-PTRS port in the same coherent group in the PTRS transmission codeword.

[0237] Assuming that the two PTRS ports use different REs, the power of one PTRS port can be increased by muting the REs used by the other PTRS port.

[0238] According to this embodiment, the UE can appropriately determine the transmission power ratio of PTRS and PUSCH even when using a partially coherent precoder for more than 4 layers.

[0239] <Implementation Method #4>

[0240] This embodiment relates to α PTRS PUSCH The settability.

[0241] In order to set the options for implementation #1 / #2 / #3, the RRC parameter ptrs-Power may be used. The entries reserved for the existing ptrs-Power may be used. The number of entries for ptrs-Power may also be expanded.

[0242] like Fig.19 As in the example, it is also possible to calculate the number of PUSCH layers n layer PUSCH The value of (5 to 8), fully coherent (FC) / partially coherent (PC) / non-coherent (NC), ptrs-Power value 00, 01, α is specified in the specification PTRS PUSCH The UE can also set the value of PUSCH layer number n layer PUSCH , the power ratio of PUSCH to PTRS is α PTRS PUSCH The value of is determined to be 10log 10 (n layer PUSCH )[dB]、3Q p - Any of 3.

[0243] [example]

[0244] The number of PUSCH layers can also be 8.

[0245] In partial coherence, the following rules can also be applied.

[0246] ·For α PTRS PUSCH =00, Option 2 / 4 of implementation #3 can also be considered.

[0247] ·For α PTRS PUSCH =01, it is also possible to consider utilizing the power that is not used in all other layers.

[0248] ·For α PTRS PUSCH =10, option 3 / 4 of implementation #3 can also be considered.

[0249] In full coherence, it is also possible to consider utilizing the power that is not used in all other layers.

[0250] In incoherence, the following rules can also be applied.

[0251] • Utilize the power not used in other REs on the same layer for other PTRS ports.

[0252] Utilize power that is not used in all other layers.

[0253] In addition to the existing ( Fig.11 ) for 4 or less layers UL-PTRS-power and α PTRS PUSCH In addition to the association (table) of Fig.19 The UL-PTRS-power and α for more than 4 layers PTRS PUSCH The UE may also switch the table based on high-level signaling. In other words, the UE may not dynamically switch between UL-PTRS-power and α PTRS PUSCH association.

[0254] existing( Fig.11 ) for 4 or less layers UL-PTRS-power and α PTRS PUSCH The association (table) can also be expanded to include Fig.19 The UL-PTRS-power and α for more than 4 layers PTRS PUSCH The UE can also dynamically switch the UL-PTRS-power and α based on the number of PUSCH layers (for example, any one from 1 to 8). PTRS PUSCH association.

[0255] like Fig. 20 As in the example, it is also possible to calculate the number of PUSCH layers n layer PUSCH The value of 8, fully coherent (FC) / partially coherent (PC) / non-coherent (NC), and the value of ptrs-Power 00, 01, 10 are specified in the specification. PTRS PUSCH The UE can also set the value of PUSCH layer number n layer PUSCH , the power ratio of PUSCH to PTRS is α PTRS PUSCH The value of is determined to be 10log 10 (n layer PUSCH )[dB]、3Q p -3, 3Q p +3, 3Q p Any one of .

[0256] like Fig.21 As in the example, it is also possible to calculate the number of PUSCH layers n layer PUSCH values ​​(5 to 8), fully coherent (FC), and at least for ptrs-Power values ​​00, 01, and FC, α is specified in the specification PTRS PUSCH When using a fully coherent precoder, the UE can also set the value of n for the number of PUSCH layers. layer PUSCH , the power ratio of PUSCH to PTRS is α PTRS PUSCH The value of is determined to be 10log 10 (n layer PUSCH ) [dB].

[0257] According to this embodiment, the UE can appropriately determine the power ratio of the PUSCH to the PTRS per layer per RE.

[0258] <Supplement>

[0259] The UE may also be assumed to have at least one PTRS port inserted / set in the antenna coherence group. In the case of using a partially interrelated precoder, the UE may also be assumed to have at least one PTRS port inserted / set in the antenna coherence group.

[0260] [Notification of information to UE]

[0261] The notification of arbitrary information (from the network (NW)) (e.g., base station (BS))) to the UE (in other words, the reception of arbitrary information from the BS in the UE) in the above-mentioned embodiments may also be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals) or a combination thereof.

[0262] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new logical channel ID (Logical Channel ID (LCID)) not specified in the existing specification in the MAC subheader.

[0263] In the case where the above notification is performed through DCI, the above notification may be performed through a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used in scrambling a cyclic redundancy check (CRC) bit assigned to the DCI, the format of the DCI, etc.

[0264] Furthermore, the notification of arbitrary information to the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0265] [Notification of information from UE]

[0266] The notification of arbitrary information from the UE (to the NW) in the above-mentioned embodiment (in other words, the sending / reporting of arbitrary information from the UE to the BS) can also be carried out using physical layer signaling (e.g., UCI), high-layer signaling (e.g., RRC signaling, MACCE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals) or a combination thereof.

[0267] In the case where the above notification is performed via MAC CE, the MAC CE can also be identified by including a new LCID that is not specified in the existing specifications in the MAC subheader.

[0268] When the notification is performed through UCI, the notification may be transmitted using PUCCH or PUSCH.

[0269] In addition, the notification of arbitrary information from the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0270] [About application of each embodiment]

[0271] At least one of the above-mentioned embodiments may also be applied to a case where a specific condition is satisfied. The specific condition may be specified in the specification or may be notified to the UE / BS using high-layer signaling / physical layer signaling.

[0272] At least one of the above-mentioned implementation modes may also be applied only to a UE that reports a specific UE capability (UE capability) or supports the specific UE capability.

[0273] The specific UE capability may also represent at least one of the following:

[0274] Supports PUSCH transmission using more than 4 antenna ports,

[0275] Supports 8-port m-layer NC / PC / FC precoders (m=1,2,...).

[0276] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across the entire frequency (commonly regardless of the frequency), or capabilities for each frequency (for example, one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), or capabilities for each frequency range (for example, frequency range 1 (Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each feature set (Feature Set (FS)) or feature set per component carrier (Feature Set Per Component-carrier (FSPC)).

[0277] Furthermore, the specific UE capability may be a capability applied across all duplex modes (common regardless of the duplex mode) or a capability for each duplex mode (eg, time division duplex (TDD) or frequency division duplex (FDD)).

[0278] In addition, at least one of the above-mentioned embodiments may also be applied to a case where specific information associated with the above-mentioned embodiments (or an action of implementing the above-mentioned embodiments) is set / activated / triggered by the UE through high-layer signaling / physical layer signaling. For example, the specific information may also be information indicating activation of the functions of each embodiment, any RRC parameter for a specific version (e.g., Rel.18 / 19), etc.

[0279] The UE may also apply operations such as Rel.15 / 16 when it does not support at least one of the above-mentioned specific UE capabilities or is not configured with the above-mentioned specific information.

[0280] (Note)

[0281] The following inventions are added to one embodiment of the present disclosure.

[0282] [Note 1]

[0283] Terminal, with:

[0284] a receiving unit that receives an indication of a transmission using a physical uplink shared channel (PUSCH) of more than 4 layers; and

[0285] The control unit determines a transmission power ratio between a phase tracking reference signal (PTRS) and the PUSCH.

[0286] [Note 2]

[0287] The terminal according to Supplement 1, wherein:

[0288] The control unit uses a fully coherent precoder in transmission of the PUSCH, and determines the transmission power ratio based on the number of antenna ports used for the PTRS and the number of layers.

[0289] [Note 3]

[0290] The terminal according to Supplement 1 or Supplement 2, wherein:

[0291] The control unit uses a non-coherent precoder in transmission of the PUSCH, and determines the transmission power ratio based on at least one of the number of antenna ports used for the PTRS and the number of layers.

[0292] [Note 4]

[0293] A terminal according to any one of Notes 1 to 3, wherein:

[0294] The control unit uses a partially coherent precoder in the transmission of the PUSCH, and determines the transmission power ratio based on at least one of the number of antenna ports used for the PTRS, the number of layers, the number of coherent groups, and the number of antenna ports in each coherent group.

[0295] (Wireless Communication System)

[0296] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0297] Fig. 22 1 is a diagram showing an example of a schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 (may also be simply referred to as the system 1) may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5GNR), or the like.

[0298] In addition, the wireless communication system 1 may also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC may also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0299] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0300] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0301] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0302] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0303] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also correspond to a frequency band higher than FR2.

[0304] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0305] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0306] The base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0307] The core network 30 may also include, for example, user plane functions (User Plane Function (UPF)), access and mobility management function (Access and Mobility management Function (AMF)), session management function (Session Management Function (SMF)), unified data management (Unified Data Management (UDM)), application function (Application Function (AF)), data network (Data Network (DN)), location management function (Location Management Function (LMF)), conservative operation management (Operation, Administration and Maintenance (Management) (OAM): operation maintenance management) and other network functions (Network Functions (NF)). In addition, multiple functions may be provided by one network node. In addition, communication with an external network (for example, the Internet) may also be carried out via the DN.

[0308] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0309] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0310] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the radio access schemes for UL and DL.

[0311] In the wireless communication system 1, as downlink channels, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. can also be used.

[0312] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used as an uplink channel.

[0313] The PDSCH transmits user data, high-layer control information, and system information blocks (SIB). The PUSCH also transmits user data, high-layer control information, and the like. In addition, the PBCH also transmits the master information block (MIB).

[0314] The PDCCH may also transmit lower layer control information. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0315] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0316] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0317] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be rewritten mutually.

[0318] Through PUCCH, uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted. Through PRACH, random access preambles for establishing a connection with a cell can also be transmitted.

[0319] In the present disclosure, downlink, uplink, etc. may be expressed without “link.” In addition, various channels may be expressed without “Physical” at the beginning.

[0320] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted as DL-RS.

[0321] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0322] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. may also be transmitted. In addition, DMRS may also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0323] (Base Station)

[0324] Fig.231 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0325] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0326] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0327] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0328] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are explained based on the common knowledge in the technical field involved in the present disclosure.

[0329] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0330] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0331] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0332] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0333] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, to generate a bit string to be sent.

[0334] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0335] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0336] On the other hand, the transmission and reception unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmission and reception antenna 130 .

[0337] The transmitting and receiving unit 120 (receiving processing unit 1212) may also apply receiving processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0338] The transmitting and receiving unit 120 (the measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (RSRP)), received 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 also be output to the control unit 110.

[0339] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30 (for example, a network node providing NF), other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0340] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0341] In addition, the transmitting and receiving unit 120 may also send an instruction to transmit using a physical uplink shared channel (PUSCH) of more than 4 layers. The control unit 110 may also determine a transmission power ratio between a phase tracking reference signal (PTRS) and the PUSCH.

[0342] (User terminal)

[0343] Fig.24 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0344] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0345] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0346] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0347] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0348] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0349] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0350] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0351] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0352] The sending and receiving unit 220 (sending processing unit 2211) may also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0353] The transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0354] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0355] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0356] On the other hand, the transmission and reception unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmission and reception antenna 230 .

[0357] The sending and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0358] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurement, CSI measurement, etc. based on the received signal. The measuring unit 223 may also measure the received power (e.g., RSRP), the received quality (e.g., RSRQ, SINR, SNR), the signal strength (e.g., RSSI), the propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0359] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0360] In addition, the transmitting and receiving unit 220 may also receive an instruction to transmit using more than 4 layers of the physical uplink shared channel (PUSCH). The control unit 210 may also determine a transmission power ratio between a phase tracking reference signal (PTRS) and the PUSCH.

[0361] The control unit 210 may also use a fully coherent precoder in transmitting the PUSCH, and determine the transmission power ratio based on the number of antenna ports used for the PTRS and the number of layers.

[0362] The control unit 210 may also use a non-coherent precoder in transmitting the PUSCH, and determine the transmission power ratio based on at least one of the number of antenna ports used for the PTRS and the number of layers.

[0363] The control unit 210 may also use a partially coherent precoder in the transmission of the PUSCH, and determine the transmission power ratio based on at least one of the number of antenna ports used for the PTRS, the number of layers, the number of coherent groups, and the number of antenna ports in each coherent group.

[0364] (Hardware structure)

[0365] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wire, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0366] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method thereof is not particularly limited.

[0367] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.25 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0368] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, and unit can be interchanged. 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 may exclude some of the devices.

[0369] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0370] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or by controlling at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0371] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the control unit 110 (210), the transmission and reception unit 120 (220), etc. described above may also be implemented by the processor 1001.

[0372] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the other functional blocks can also be implemented in the same way.

[0373] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0374] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0375] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0376] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0377] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0378] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0379] (Variation)

[0380] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may be rewritten one another. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0381] A radio frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0382] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0383] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0384] A time slot may also contain multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0385] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be replaced with each other.

[0386] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0387] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0388] TTI can also be a transmission time unit for a data packet (transport block), code block, code word, etc. that has been channel-coded, and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (for example, the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can also be shorter than the TTI.

[0389] In addition, when a time slot or a mini time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling may also be controlled.

[0390] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0391] In addition, a long TTI (eg, normal TTI, subframe, etc.) may be rewritten as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI, etc.) may be rewritten as a TTI having a TTI length shorter than that of a long TTI and longer than 1 ms.

[0392] Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0393] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0394] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0395] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0396] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs can also be identified by the index of the RB based on the common reference point of the carrier. PRBs can also be defined in a BWP and numbered within the BWP.

[0397] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0398] At least one of the set BWPs may be activated, and the UE may not assume that a specific signal / channel is transmitted or received outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0399] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0400] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0401] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0402] Information, signals, etc. described in the present disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0403] In addition, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0404] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or added. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0405] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0406] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0407] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0408] The determination may be made using a value represented by one bit (0 or 1), a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(eg, comparison with a specific value).

[0409] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable files, execution thread, procedure, function, etc.

[0410] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when the software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0411] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0412] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "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" can be used interchangeably.

[0413] In the present disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)")", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro cell, and pico cell.

[0414] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that performs communication services within the coverage area.

[0415] In the present disclosure, the base station sending information to the terminal may also be rewritten with the base station instructing the terminal to control / operate based on the information.

[0416] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0417] There are also instances where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or some other appropriate terminology.

[0418] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0419] The mobile body refers to a movable object, and the moving speed is arbitrary, including the case where the mobile body is stopped. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air balloons, and objects carried on them, but is not limited to these. In addition, the mobile body can also be a mobile body that drives autonomously based on operating instructions.

[0420] The mobile object may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0421] Fig.261 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0422] The driving unit 41 is composed of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a handle), and steers at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0423] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an electronic control unit (ECU).

[0424] As signals from various sensors 50-58, there are the following signals, etc.: a current signal from a current sensor 50 for sensing the current of a motor, a speed signal of the front wheels 46 / rear wheels 47 obtained by a speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of an accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of a brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of a shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0425] The information service unit 59 is composed of various devices for providing (outputting) various information such as driving information, traffic information, entertainment information, etc., such as a navigation system, an audio system, a speaker, a display, a television, and a radio, and one or more ECUs for controlling these devices. The information service unit 59 provides various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40 using information acquired from an external device via the communication module 60, etc.

[0426] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0427] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents in advance or reducing the driving burden of the driver, such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning detector (for example, Global Navigation Satellite System (GNSS)), map information (for example, High Definition (HD) map, Autonomous Vehicle (AV) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS)), etc.), artificial intelligence (Artificial Intelligence (AI)) chip, AI processor, and one or more ECUs for controlling these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 to realize the driving assistance function or the automatic driving function.

[0428] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) between the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 provided in the vehicle 40 via the communication port 63.

[0429] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received with the external device via wireless communication. The communication module 60 can be inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it can also function as at least one of the base station 10 and user terminal 20).

[0430] The communication module 60 may also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted by the communication module 60 may also include information based on the above input.

[0431] The communication module 60 receives various information (traffic information, signal information, vehicle information, etc.) transmitted from an external device, and displays it on the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit that outputs information (for example, outputs information to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0432] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc., which are provided in the vehicle 40.

[0433] In addition, the base station in the present disclosure may also be rewritten as a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be rewritten as terms corresponding to inter-terminal communication (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may also be rewritten as sidelink channels.

[0434] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0435] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node depending on the situation. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0436] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, timings, flow charts, etc. of the various methods / implementations described in this disclosure may be swapped in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0437] The various modes / implementations described in the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems that are extended, modified, generated, or specified based on them. In addition, multiple systems can also be combined (for example, LTE or LTE-A, combination with 5G, etc.) for application.

[0439] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0440] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0441] The term "determining" used in this disclosure may include a variety of operations. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are regarded as performing "determining".

[0442] In addition, “judgment (decision)” may also refer to situations where receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), accessing (e.g., accessing data in a memory), etc. are regarded as making a “judgment (decision)”.

[0443] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as "judgment (decision)". That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as "judgment (decision)".

[0444] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0445] The “maximum transmit power” described in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated maximum transmit power).

[0446] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be rewritten as "access".

[0447] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, being "connected" or "combined" to each other using electromagnetic energy with a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc.

[0448] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same manner as "different".

[0449] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0450] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0451] In the present disclosure, "below", "less than", "above", "more", "equal to", etc. may also be rephrased with each other. Furthermore, in the present disclosure, words meaning "good", "bad", "big", "small", "high", "low", "early", "slow", "wide", "narrow", etc. are not limited to the original form, comparative form and superlative form, but may also be rephrased with each other. Furthermore, in the present disclosure, words meaning "good", "bad", "big", "small", "high", "low", "early", "slow", "wide", "narrow", etc. are not limited to the original form, comparative form and superlative form, but may also be rephrased with each other as expressions with "the ith" (i is an arbitrary integer) attached thereto (for example, "the highest" may also be rephrased with "the ith highest").

[0452] In the present disclosure, “of”, “for”, “regarding”, “related to”, “associated with”, etc. may be replaced by each other.

[0453] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: a receiving unit, receiving an indication of transmission using a physical uplink shared channel PUSCH of more than 4 layers; and The control unit determines the transmission power ratio between the phase tracking reference signal PTRS and the PUSCH.

2. The terminal according to claim 1, wherein: The control unit uses a fully coherent precoder in transmission of the PUSCH, and determines the transmission power ratio based on the number of antenna ports used for the PTRS and the number of layers.

3. The terminal according to claim 1, wherein: The control unit uses a non-coherent precoder in transmission of the PUSCH, and determines the transmission power ratio based on at least one of the number of antenna ports used for the PTRS and the number of layers.

4. The terminal according to claim 1, wherein: The control unit uses a partially coherent precoder in the transmission of the PUSCH, and determines the transmission power ratio based on at least one of the number of antenna ports used for the PTRS, the number of layers, the number of coherent groups, and the number of antenna ports in each coherent group.

5. A wireless communication method, which is a wireless communication method of a terminal, comprising: The step of receiving an indication of transmission of a physical uplink shared channel PUSCH using more than 4 layers; and The step of determining the transmission power ratio between the phase tracking reference signal PTRS and the PUSCH.

6. A base station, comprising: a transmitting unit, transmitting an indication of transmission using a physical uplink shared channel PUSCH of more than 4 layers; and The control unit determines the transmission power ratio between the phase tracking reference signal PTRS and the PUSCH.

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