Terminal device and base station device

Abstract

To provide a terminal device and a base station device that efficiently communicate in services supported by NR, and communication methods used therefor.SOLUTION: In a wireless communication system, a terminal device includes a receiving unit that receives a PDCCH to which DCI is mapped and a transmitting unit that transmits a PUCCH scheduled by the DCI. A DMRS for a PUSCH is mapped to resource elements, and a maximum number of layers is set. A plurality of DMRS ports is determined by a DCI antenna port field, and the number of layers is determined by the antenna port field. A precoding matrix is determined based at least on the antenna port field and one TPMI. A precoding information-number-of-layers field in the DCI indicates one TPMI from N TPMIs. N is independent of the number of layers.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a terminal device and a base station device. [Background technology]

[0002] The radio access method and radio network for cellular mobile communications (hereinafter referred to as "Long Term Evolution (LTE)" or "EUTRA: Evolved Universal Terrestrial Radio Access") is being developed by the Third Generation Partnership Project (3GPP). rd This is being studied in the LTE Generation Partnership Project. In LTE, base station devices are also called eNodeBs (evolved NodeBs) and terminal devices are also called UEs (User Equipment). LTE is a cellular communication system in which areas covered by base station devices are arranged in multiple cell-like configurations. A single base station device may manage multiple serving cells.

[0003] 3GPP is currently studying the next-generation standard (NR: New Radio) to propose it to IMT (International Mobile Telecommunication)-2020, a standard for next-generation mobile communication systems formulated by the International Telecommunication Union (ITU) (Non-Patent Document 1). NR is a technology that combines eMBB (enhanced Mobile Broadband) and ), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication). .

[0004] 3GPP is currently studying the expansion of services supported by NR (non- Patent document 2). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] "New SID proposal: Study on New Radio Access Technology", RP-160671, NTT docomo, 3GPP TSG RAN Meeting #71, Goteborg, Sweden, 7th - 10th March, 2016. [Non-patent document 2] “Release 17 package for RAN”, RP-193216, RAN chairman, RAN1 chairman, RAN2 chairman, RAN3 chairman, 3GPP TSG RAN Meeting #86, Sitges, Spain, 9th ― 12th December, 2019 [Non-patent document 3] “Release 18 package summary”, RP-213469, RAN chairman, RAN1 chairman, RAN2 chairman, RAN3 chairman, 3GPP TSG RAN Meeting #94-e, 6th ― 17th December, 2021 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides a terminal device that performs efficient communication, a communication method used in the terminal device, a base station device that performs efficient communication, and a communication method used in the base station device. [Means for solving the problem]

[0007] (1) A first aspect of the present invention is a terminal device, comprising: a receiving unit that receives a PDCCH to which a DCI is mapped; and a transmitting unit that transmits a PUSCH scheduled by the DCI, wherein a DMRS for the PUSCH is mapped to one or more resource elements, and the PUSCH The maximum number of layers is set to 5 or more, and a plurality of DMRS ports for the DMRS are set. The number of layers for the PUSCH is determined by the antenna port field in the DCI, and the number of layers is 5, 6, 7 and 8, and the precoding matrix for the PUSCH is The DCI is determined based at least on a tenaport field and one TPMI, and a precoding information-layer number field in the DCI indicates the one TPMI from N TPMIs. , N does not depend on the number of layers.

[0008] (2) Also, a second aspect of the present invention is a base station apparatus, comprising: a transmitter that transmits a PDCCH to which a DCI is mapped; and a receiver that receives a PUSCH scheduled by the DCI, wherein a DMRS for the PUSCH is mapped to one or more resource elements; a maximum number of layers is set for the PUSCH to be 5 or more; a plurality of DMRS ports for the DMRS are determined by an antenna port field in the DCI; the number of layers for the PUSCH is determined by the antenna port field, and the number of layers is any one of 5, 6, 7, and 8; and a precoding matrix for the PUSCH is determined by a precoding matrix for a precoding matrix. The DCI is determined based on at least the antenna port field and one TPMI, and the precoding information - number of layers field in the DCI is determined based on the one TPMI from N TPMIs. where N does not depend on the number of layers.

[0009] (3) A third aspect of the present invention is a terminal device, comprising: a receiving unit that receives a PDCCH to which a DCI is mapped; and a transmitting unit that transmits a PUSCH scheduled by the DCI, wherein a DMRS for the PUSCH is mapped to one or more resource elements; a maximum number of layers for the PUSCH is set to be any one of 5, 6, 7, and 8; and The multiple DMRS ports for the DMRS are determined by the antenna port field in the DCI and the The number of layers for the PUSCH is determined by the precoding information - number of layers field in the DCI, and the number of layers is not expected to be 1, 2, 3, or 4. [Effects of the Invention]

[0010] According to the present invention, the terminal device can perform communication efficiently, and the base station device can perform communication efficiently. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a conceptual diagram of a wireless communication system according to an aspect of the present embodiment. [Figure 2] 10 is an example showing the relationship between a subcarrier spacing setting μ, the number of OFDM symbols per slot Nslot symb, and a cyclic prefix (CP) setting according to one aspect of the present embodiment. [Figure 3] FIG. 10 is a diagram illustrating an example of a method for configuring a resource grid according to an aspect of the present embodiment. [Figure 4] FIG. 3 is a diagram illustrating an example of the configuration of a resource grid 3001 according to an aspect of the present embodiment. [Figure 5] 2 is a schematic block diagram illustrating an example of the configuration of a base station device 3 according to one aspect of the present embodiment. FIG. [Figure 6] 1 is a schematic block diagram showing an example of the configuration of a terminal device 1 according to an aspect of the present embodiment. [Figure 7]FIG. 2 is a diagram illustrating an example of the configuration of an SS / PBCH block according to one aspect of this embodiment. [Figure 8] FIG. 10 is a diagram illustrating an example of a monitoring opportunity for a set of search areas according to one aspect of the present embodiment. [Figure 9] FIG. 10 is a diagram illustrating an example of mapping of DMRS for PUSCH to antenna ports according to one aspect of the present embodiment. [Figure 10] FIG. 10 is a diagram illustrating a method for determining the number of layers for a PUSCH according to one aspect of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described.

[0013] floor(C) may be a floor function for real number C. For example, floor(C) may be a function that outputs the largest integer that does not exceed real number C. ceil(D) may be a ceiling function for real number D. For example, ceil(D) may be a function that outputs the smallest integer that does not fall below real number D. mod(E,F) is a function that outputs the remainder when E is divided by F. mod(E,F) is a function that outputs the value corresponding to the remainder when E is divided by F. exp(G)=e^G, where e is Napier's constant. H^I indicates H to the Ith power. max(J,K) is a function that outputs the maximum value among J and K. Here, if J and K are equal, max(J,K) is a function that outputs J or K. min(L,M) is a function that outputs the maximum value among L and M. Here, if L and M are equal, min(L,M) is a function that outputs L or M. round(N) is a function that outputs the integer value closest to N. "·" indicates multiplication.

[0014] In a wireless communication system according to an aspect of the present embodiment, at least Orthogonal Frequency Division Multiplexing (OFDM) is used. An OFDM symbol is a unit of time domain of OFDM. An OFDM symbol includes at least one or more subcarriers. The OFDM symbol is converted into a time-continuous signal in baseband signal generation. In the downlink, at least CP-OFDM (Cyclic Prefix - Orthogonal Frequency Division Multiplexing) is used. In the uplink, CP-OFDM Either Discrete Fourier Transform - spread - Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) or Discrete Fourier Transform - spread - Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) is used. DFT-s-OFDM may be obtained by applying transform precoding to CP-OFDM.

[0015] The OFDM symbol may be a name including a CP added to the OFDM symbol. In other words, a certain OFDM symbol may be configured to include the certain OFDM symbol and the CP added to the certain OFDM symbol.

[0016] Fig. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment. In Fig. 1, the wireless communication system includes at least terminal devices 1A to 1C and a base station device 3 (BS#3: Base station#3). Hereinafter, the terminal devices 1A to 1C will also be referred to as terminal device 1 (UE#1: User Equipment#1).

[0017] The base station device 3 may be configured to include one or more transmission devices (or transmission points, transmission / reception devices, or transmission / reception points). When the base station device 3 is configured with multiple transmission devices, the multiple transmission devices may be located at different positions.

[0018] The base station device 3 may provide one or more serving cells. A serving cell may be defined as a set of resources used for wireless communication. A serving cell may also be referred to as a cell.

[0019] A serving cell may be configured to include one or both of a downlink component carrier (downlink carrier) and one or both of an uplink component carrier (uplink carrier). A serving cell may be configured to include one or both of two or more downlink component carriers and two or more uplink component carriers. Downlink component carriers and uplink component carriers are also collectively referred to as component carriers (carriers).

[0020] For example, one resource grid may be assigned to each component carrier. Also, one component carrier and a certain subcarrier spacing setting may be assigned to each component carrier. One resource grid may be provided for each set of subcarrier spacing configurations μ, where the subcarrier spacing configuration μ is also referred to as numerology. For example, one resource grid may be provided for a set of antenna ports p, a subcarrier spacing configuration μ, and a transmission direction x.

[0021] The subcarrier spacing (subcarrier spacing setting) μ is 0, 1, 3 for the synchronization channel. , 4. Setting of subcarrier interval (setting of subcarrier interval) μ may be 0, 1, 2, or 3 for the data channel. The synchronization channel may be a general term for the PSS, SSS, and PBCH. The data channel may be a general term for at least the PDSCH, PUSCH, PDCCH, and PUCCH.

[0022] The resource grid is size,μ grid,x N RB sc where The resource grid is divided into common resource blocks N start,μ grid,x It starts from Resource Block N start,μ grid,x is also called the reference point of the resource grid.

[0023] The resource grid is subframe,μ symb It contains OFDM symbols.

[0024] The subscript x attached to the resource grid related parameters specifies the sending direction. For example, the subscript x indicates either the downlink or the uplink. It may also be used for

[0025] N size,μ grid,x is indicated by a parameter provided by the RRC layer (e.g., Data CarrierBandwidth) offset setting. start,μ grid,x is the bandwidth configuration indicated by parameters provided by the RRC layer (e.g., parameter OffsetToCarrier). The offset setting and band setting are the configuration of the SCS-specific carrier. This is the setting used for

[0026] Subcarrier spacing (SCS) for a certain subcarrier spacing setting μ )Δf is Δf=2 μ 15 kHz. Here, the subcarrier spacing setting μ is 0 , 1, 2, 3, or 4 may be indicated.

[0027] FIG. 2 shows a subcarrier spacing setting μ and the number of OFDM symbols per slot N according to one aspect of this embodiment. slot symb 2A, for example, when the subcarrier spacing setting μ is 2 and the CP setting is normal cyclic prefix (CP), N slot symb =14, N frame,μ slot =40, N subframe, μ slot = 4. In addition, in FIG. 2B, for example, if the subcarrier spacing setting μ is 2, If the CP setting is an extended cyclic prefix (CP), slot symb =12, N frame ,μ slot =40, N subframe,μ slot =4.

[0028] Time unit T c may be used to express a length in the time domain. c is T c =1 / (Δf max N f ) Δf max = 480 kHz. f =409 6. The constant κ is κ=Δf max N f / (Δf ref N f,ref )=64. Δf ref is 1 5kHz. N f,ref is 2048.

[0029] The transmission of the signal in the downlink and / or the transmission of the signal in the uplink may be a period of length T f The radio frame (system frame, frame) may be organized into T f =(Δf max N f / 100)·T s = 10 ms. A radio frame consists of 10 subframes. The length of a subframe is T sf =(Δf max N f / 1000)·T s = 1 ms. The number of OFDM symbols per subframe is N subframe,μ symb =N slot symb N subframe,μ slot is.

[0030] An OFDM symbol is a time domain unit of a communication system. For example, an OFDM symbol may be a time domain unit of CP-OFDM. Also, an OFDM symbol may be a time domain unit of DFT-s-OFDM.

[0031] A slot may consist of multiple OFDM symbols, e.g., N consecutive OFDM symbols. slot symb One slot may be composed of OFDM symbols. For example, In the settings, N slot symb In addition, in the setting of the extended CP, N slot symb =12.

[0032] For a given subcarrier spacing setting μ, the number and index of slots contained in the subframe may be given. For example, slot index n μ s ranges from 0 to N in the subframe subframe,μ slot The sub-characters may be given in ascending order as integer values ​​in the range -1. For setting the rear interval μ, the number and index of slots included in the radio frame may be given. Also, the slot index n μ s,f ranges from 0 to N in the radio frame. frame,μ slot Integer values ​​in the range -1 to +1 may be given in ascending order.

[0033] Fig. 3 is a diagram showing an example of a resource grid configuration method according to one aspect of this embodiment. The horizontal axis in Fig. 3 represents the frequency domain. Fig. 3 shows an example of a resource grid configuration with subcarrier spacing μ1 in a component carrier 300, and an example of a resource grid configuration with subcarrier spacing μ2 in the component carrier. In this way, one or more subcarrier spacings may be set for a given component carrier. Fig. 3 assumes that μ1 = μ2-1, but various aspects of this embodiment are not limited to the condition μ1 = μ2-1.

[0034] The component carrier 300 is a band having a predetermined width in the frequency domain.

[0035] Point 3000 is an identifier for identifying a certain subcarrier. The point 3000 is also called point A. The common resource block (CRB) set 3100 is a common resource block for the subcarrier spacing setting μ1. It's a rock set.

[0036] Of the common resource block set 3100, the common resource block that includes the point 3000 (the black block in the common resource block set 3100 in FIG. 3) is also called the reference point of the common resource block set 3100. The reference point of the common resource block set 3100 may be the common resource block with index 0 in the common resource block set 3100.

[0037] The offset 3011 is the offset from the reference point of the common resource block set 3100 to the reference point of the resource grid 3001. The offset 3011 is indicated by the number of common resource blocks for the subcarrier spacing setting μ1. The resource grid 3001 is N size,μ grid1,x It contains common resource blocks.

[0038] The offset 3013 is the distance from the reference point of the resource grid 3001 to the reference point (N start,μ BWP,i1 ) is the offset to

[0039] Common resource block set 3200 is a set of common resource blocks for subcarrier spacing setting μ2.

[0040] In the common resource block set 3200, the common resource block including the point 3000 (the black block in the common resource block set 3200 in FIG. 3) is also referred to as the reference point of the common resource block set 3200. The reference point of the common resource block set 3200 may be the common resource block with index 0 in the common resource block set 3200.

[0041] The offset 3012 is the offset from the reference point of the common resource block set 3200 to the reference point of the resource grid 3002. The offset 3012 is indicated by the number of common resource blocks relative to the subcarrier spacing μ. The resource grid 3002 is N size,μ grid2,x It contains common resource blocks.

[0042] The offset 3014 is the distance from the reference point of the resource grid 3002 to the reference point of the BWP 3004 with index i2 (Nstart,μ BWP,i2 ) is the offset to

[0043] 4 is a diagram showing an example of the configuration of a resource grid 3001 according to one aspect of this embodiment. In the resource grid of FIG. 4, the horizontal axis represents the OFDM symbol index l sym and the vertical axis is the subcarrier index k sc The resource grid 3001 is size,μ grid1,x N RB sc contains N subcarriers, subframe,μ symb Contains OFDM symbols. Within the grid, subcarrier index k sc and OFDM symbol index l sym The resource specified by is also called a resource element (RE).

[0044] Resource Block (RB) is N RB sc Contains consecutive subcarriers Resource blocks are divided into common resource blocks, physical resource blocks (PRBs), and virtual resource blocks (VRBs). Here, N RB sc =12.

[0045] A resource block unit is a set of resources corresponding to one OFDM symbol in one resource block, i.e., one resource block unit includes 12 resource elements corresponding to one OFDM symbol in one resource block.

[0046] The common resource blocks for a given subcarrier spacing setting μ are indexed in a given common resource block set in the frequency domain in ascending order starting from 0. The common resource block with index 0 for a given subcarrier spacing setting μ contains (or collides with, or coincides with) point 3000. The index n of the common resource block for a given subcarrier spacing setting μ μ CRB is n μ CRB =ceil(k sc / N RB sc ) relationship is satisfied. Here, k sc The subcarrier with 0 corresponds to point 3000. It is a subcarrier having the same center frequency as the center frequency of the subcarrier being used.

[0047] The physical resource blocks for a given subcarrier spacing setting μ are given as follows in a given BWP: The indexes are assigned in ascending order starting from 0 in the frequency domain. The index n of the physical resource block for a given subcarrier spacing setting μ is μ PRB is n μ CRB =n μ PRB +N start,μ BWP,i where N start,μ BWP,i denotes the reference point of the BWP with index i.

[0048] A BWP is defined as a subset of common resource blocks contained in a resource grid. The BWP is located at the reference point N of the BWP. start,μ BWP,i Starting with N size,μ BWP,i Common litho The BWP configured for the downlink carrier is also called the downlink BWP. The BWP configured for an uplink component carrier is also called an uplink BWP.

[0049] An antenna port may be defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed. For example, a channel may correspond to a physical channel, a symbol may correspond to an OFDM symbol, a symbol may correspond to a resource block unit, or a symbol may correspond to a resource element.

[0050] When the large-scale properties of the channel through which symbols are transmitted at one antenna port can be estimated from the channel through which symbols are transmitted at another antenna port, the two antenna ports are said to be Quasi Co-Located (QCL). Here, the large-scale characteristics may include at least long-range channel characteristics. The large-scale characteristics may include at least some or all of delay spread, Doppler spread, Doppler shift, average gain, average delay, and beam parameters (spatial Rx parameters). The first antenna port and the second antenna port are QCLs in terms of beam parameters when the receiving beam assumed by the receiving side for the first antenna port and the second antenna port are QCLs in terms of beam parameters. The first antenna port and the second antenna port are QCLs in terms of beam parameters when the transmission beam assumed by the receiver for the first antenna port is the same (or corresponds to) the transmission beam assumed by the receiver for the first antenna port. The transmission beam assumed by the receiving side for the second antenna port may be the same (or correspond to) the transmission beam assumed by the receiving side for the second antenna port. The terminal device 1 assumes that the two antenna ports are QCLs if the large-scale characteristics of the channel through which symbols are transmitted at one antenna port can be estimated from the channel through which symbols are transmitted at the other antenna port. The fact that the two antenna ports are QCLs may mean that the two antenna ports are assumed to be QCLs.

[0051] The two antenna ports may be type A QCLs, which may indicate that a first large-scale characteristic of a channel through which symbols are transmitted at one antenna port can be estimated from a channel through which symbols are transmitted at another antenna port. The two antenna ports may be type B QCLs, which may indicate that a second large-scale characteristic of a channel through which symbols are transmitted at one antenna port can be estimated from a channel through which symbols are transmitted at another antenna port. The two antenna ports may be type C QCLs, which may indicate that a third large-scale characteristic of a channel through which symbols are transmitted at one antenna port can be estimated from a channel through which symbols are transmitted at another antenna port. The two antenna ports may be type D QCLs, which may indicate that a fourth large-scale characteristic of a channel through which symbols are transmitted at one antenna port can be estimated from a channel through which symbols are transmitted at another antenna port. The first large-scale characteristic may include all of Doppler shift, Doppler spread, mean delay, and delay spread. The second large-scale characteristic may include all of Doppler shift and Doppler spread. The third large-scale characteristic may include all of the Doppler shift and the average delay. The fourth large-scale characteristic may include spatial reception parameters (spatial direction information, beam information). An antenna port for a DMRS may be a DMRS port. An antenna port for a PTRS may be a PTRS port. An antenna port associated with a PTRS may be a PTRS port. An antenna port for an SRS may be an SRS port. An antenna port for a DMRS may be a DMRS port. An antenna port associated with a DMRS may be a DMRS port. It may be an RS port.

[0052] Carrier aggregation is the process of providing multiple aggregated serving The carrier aggregation may be performed by using a cell. The carrier aggregation may be performed by using a plurality of aggregated component carriers. The carrier aggregation may be performed by using a plurality of aggregated downlink component carriers. The carrier aggregation may be performed by using a plurality of aggregated uplink component carriers.

[0053] 5 is a schematic block diagram showing an example of the configuration of a base station device 3 according to one aspect of the present embodiment. As shown in FIG. 5, the base station device 3 includes at least a radio transmission / reception unit (physical layer processing unit) 30 and / or part or all of a higher layer processing unit 34. The radio transmission / reception unit 30 includes an antenna unit 31, an RF (Radio Frequency) unit 32, and a base station The upper layer processing unit 34 includes at least a part or all of a media access control layer processing unit 35 and a part or all of a radio resource control (RRC) layer processing unit 36.

[0054] The wireless transceiver 30 includes at least a wireless transmitter 30a and part or all of a wireless receiver 30b. The baseband unit included in the wireless transmitter 30a and the baseband unit included in the wireless receiver 30b may have the same or different device configurations. The RF unit included in the wireless transmitter 30a and the RF unit included in the wireless receiver 30b may have the same or different device configurations. The antenna unit included in the wireless transmitter 30a and the wireless receiver The antenna units included in the receiving unit 30b may have the same or different device configurations.

[0055] For example, the radio transmitting unit 30a may generate and transmit a baseband signal of a PDSCH. For example, the radio transmitting unit 30a may generate and transmit a baseband signal of a PDCCH. For example, the radio transmitting unit 30a may generate and transmit a baseband signal of a PBCH. For example, the radio transmitting unit 30a may generate and transmit a baseband signal of a radio The wireless transmitter 30a may generate and transmit a baseband signal of the synchronization signal. The radio transmitter 30a may generate and transmit a baseband signal for the PDSCH DMRS. For example, the radio transmitter 30a may generate and transmit a baseband signal for the PDCCH DMRS. For example, the radio transmitter 30a may generate and transmit a baseband signal for the CSI-RS. For example, the radio transmitter 30a may generate and transmit a baseband signal for the DL PTRS.

[0056] For example, the radio receiver 30b may receive a PRACH. For example, the radio receiver 30b may receive and demodulate a PUCCH. For example, the radio receiver 30b may receive and demodulate a PUSCH. For example, the radio receiver 30b may receive a PUCCH DMRS. For example, the radio receiver 30b The radio receiver 30b may receive a PUSCH DMRS. For example, the radio receiver 30b may receive an UL PTRS. For example, the radio receiver 30b may receive an SRS.

[0057] The upper layer processing unit 34 outputs the downlink data (transport block) to the radio transceiver unit 30 (or the radio transmitter unit 30a). The upper layer processing unit 34 performs processing on the Medium Access Control (MAC) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the RRC layer.

[0058] The medium access control layer processing unit 35 included in the upper layer processing unit 34 performs MAC layer processing.

[0059] The radio resource control layer processing unit 36 ​​included in the upper layer processing unit 34 performs processing of the RRC layer. The RRC layer processing unit 36 ​​processes various setting information / parameters (RRC parameters) of the terminal device 1. The radio resource control layer processing unit 36 ​​manages the RRC message received from the terminal device 1. Set parameters based on the message.

[0060] The radio transceiver 30 (or the radio transmitter 30a) performs processing such as modulation and encoding. The radio transceiver 30 (or the radio transmitter 30a) modulates, encodes, and transmits downlink data. The radio transmission / reception unit 30 (or the radio transmission unit 30a) generates a physical signal by generating a baseband signal (converting it into a time-continuous signal) and transmits it to the terminal device 1. Alternatively, the signal may be arranged on a component carrier and transmitted to the terminal device 1.

[0061] The radio transmitting / receiving unit 30 (or the radio receiving unit 30b) performs processes such as demodulation and decoding. The wireless transceiver 30 (or the wireless receiver 30b) separates, demodulates, and The radio transmitting / receiving unit 30 (or the radio receiving unit 30b) may perform a channel access procedure prior to transmitting a physical signal.

[0062] The RF unit 32 converts (down-converts) the signal received via the antenna unit 31 into a baseband signal by quadrature demodulation, and removes unnecessary frequency components. The RF unit 32 outputs the processed analog signal to the baseband unit.

[0063] The baseband unit 33 converts the analog signal input from the RF unit 32 into The baseband unit 33 removes a portion corresponding to a CP (Cyclic Prefix) from the converted digital signal, and performs the following on the signal from which the CP has been removed: A fast Fourier transform (FFT) is performed to extract the frequency domain signal.

[0064] The baseband unit 33 performs an inverse fast Fourier transform (IFFT) on the data to generate OFDM symbols, adds CPs to the generated OFDM symbols, and converts the data into baseband symbols. The baseband unit 33 generates a baseband digital signal, and converts the baseband digital signal into an analog signal. The baseband unit 33 outputs the converted analog signal to the RF unit 32.

[0065] The RF unit 32 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 33, and up-converts the analog signal to a carrier frequency. The RF unit 32 converts the received signal into a digital signal and transmits it via the antenna unit 31. The RF unit 32 may also have a function to control transmission power. The RF unit 32 is also referred to as a transmission power control unit.

[0066] For the terminal device 1, one or more serving cells (or component carriers, downlink component carriers, uplink component carriers) may be configured.

[0067] Each of the serving cells configured for the terminal device 1 is a PCell (Primary cell, The cell may be any one of a Primary Cell (PSCell), a Primary SCG cell (PSCell), and a Secondary Cell (SCell).

[0068] The PCell is a serving cell included in an MCG (Master Cell Group). The PCell is a cell (cell) in which the terminal device 1 performs an initial connection establishment procedure or a connection re-establishment procedure. (cells where the treatment was performed).

[0069] A PSCell is a serving cell included in an SCG (Secondary Cell Group). , is the serving cell to which random access is performed by the terminal device 1.

[0070] An SCell may be included in either an MCG or an SCG.

[0071] A serving cell group (cell group) is a term that includes at least an MCG and an SCG. A serving cell group may include one or more serving cells (or component carriers). One or more serving cells (or component carriers) included in a serving cell group may be operated by carrier aggregation.

[0072] One or more downlink BWPs may be configured for each serving cell (or downlink component carrier). One or more uplink BWPs are configured for each component carrier. That's fine.

[0073] Of one or more downlink BWPs configured for a serving cell (or a downlink component carrier), one downlink BWP is set as the active downlink BWP. may be configured (or one downlink BWP may be activated). Of one or more uplink BWPs configured for a serving cell (or uplink component carrier), one uplink BWP is set as the active uplink BWP. (Alternatively, one uplink BWP may be activated).

[0074] The PDSCH, PDCCH, and CSI-RS may be received in an active downlink BWP. The terminal device 1 may attempt to receive the PDSCH, PDCCH, and CSI-RS in an active downlink BWP. The PUCCH and PUSCH are transmitted in an active uplink BWP. The terminal device 1 may transmit PUCCH and PUSCH in the active uplink BWP. The active downlink BWP and the active uplink BWP are also collectively referred to as the active BWP.

[0075] PDSCH, PDCCH, and CSI-RS are transmitted in downlink BWPs other than the active downlink BWP ( The terminal device 1 may not receive the signal in the inactive downlink BWP. In a downlink BWP that is not an active downlink BWP, the reception of PDSCH, PDCCH, and CSI-RS is PUCCH and PUSCH are not active uplink BWPs and therefore no transmission is attempted. The terminal device 1 does not need to transmit the PUCCH and the PUSCH in an uplink BWP that is not an active uplink BWP. Active BWPs are collectively referred to as inactive BWPs.

[0076] A downlink BWP switch is a process of switching one active UE in a serving cell. Deactivate the downlink BWP and deactivate the in-band BWP of the serving cell. This is the procedure to activate one of the active downlink BWPs. Downlink BWP switching may be controlled by the BWP field included in the downlink control information. Downlink BWP switching may also be controlled based on higher layer parameters. good.

[0077] Uplink BWP switching is used to deactivate one active uplink BWP and activate any inactive uplink BWP other than the one active uplink BWP. The handover may be controlled by the BWP field included in the downlink control information. BWP switching of a link may be controlled based on higher layer parameters.

[0078] Of one or more downlink BWPs configured for the serving cell, two or more A downlink BWP does not have to be set as the active downlink BWP. For a serving cell, one downlink BWP may be active at a given time.

[0079] Two or more of one or more uplink BWPs configured for the serving cell An uplink BWP does not have to be set as the active uplink BWP. For a serving cell, one uplink BWP may be active at a given time.

[0080] Fig. 6 is a schematic block diagram showing an example configuration of a terminal device 1 according to one aspect of the present embodiment. As shown in Fig. 6, the terminal device 1 includes at least one or all of a radio transmission / reception unit (physical layer processing unit) 10 and an upper layer processing unit 14. The radio transmission / reception unit 10 includes at least an antenna unit 11, an RF unit 12, and part or all of a baseband unit 13. The upper layer processing unit 14 includes at least a medium access control layer processing unit 15 and part or all of a radio resource control layer processing unit 16.

[0081] The wireless transceiver 10 includes at least a wireless transmitter 10a and a part or all of a wireless receiver 10b. The device configuration of the baseband unit 13 included in 10b may be the same or different. The RF unit 12 included in the wireless transmitting unit 10a and the RF unit 12 included in the wireless receiving unit 10b may have the same configuration or may have different configurations. The antenna unit 11 and the antenna unit 11 included in the wireless receiving unit 10b have the same device configuration. may or may not be the same.

[0082] For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PRACH. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUCCH. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUSCH. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUCCH DMRS. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUSCH DMRS. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a UL PTRS. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUCCH DMRS. The receiving unit 10a may generate and transmit a baseband signal of the SRS. Generating the signal may include generating an SRS sequence.

[0083] For example, the wireless receiving unit 10b may receive and demodulate the PDSCH. For example, the wireless receiving unit 10b may receive and demodulate the PDCCH. For example, the wireless receiving unit 10b may receive the PBCH, For example, the wireless receiving unit 10b may receive a synchronization signal. The wireless receiver 10b may receive a PDSCH DMRS. For example, the wireless receiver 10b may receive a PDCCH DMRS. For example, the wireless receiver 10b may receive a CSI-RS. For example, the wireless receiver 10b may receive a DL PTRS.

[0084] The upper layer processing unit 14 outputs the uplink data (transport block) to the radio transceiver unit 10 (or the radio transmitter unit 10a). The upper layer processing unit 14 performs processing on the MAC layer, the integrated packet data protocol layer, the radio link control layer, and the RRC layer.

[0085] The medium access control layer processing unit 15 included in the upper layer processing unit 14 performs processing of the MAC layer.

[0086] The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing for the RRC layer. The RRC layer processing unit 16 processes various setting information / parameters (RRC parameters) of the terminal device 1. The radio resource control layer processing unit 16 manages the RRC messages received from the base station device 3. Set RRC parameters based on the message.

[0087] The radio transmission / reception unit 10 (or the radio transmission unit 10a) performs processing such as modulation and encoding. The radio transceiver 10 (or the radio transmitter 10a) modulates, encodes, and transmits uplink data. Generates a physical signal by generating a baseband signal (converting it into a time-continuous signal) and The radio transmission / reception unit 10 (or the radio transmission unit 10a) transmits the physical signal to the base station device 3. It may be arranged in a certain BWP (active uplink BWP) and transmitted to the base station device 3.

[0088] The radio transmitting / receiving unit 10 (or the radio receiving unit 10b) performs processes such as demodulation and decoding. The radio transceiver 10 (or the radio receiver 30b) may receive a physical signal in a certain BWP (active downlink BWP) of a certain serving cell. The radio receiving unit 10b) separates, demodulates, and decodes the received physical signal, and outputs the decoded information as The radio transmission / reception unit 10 (radio reception unit 10b) outputs the physical signal to the upper layer processing unit 14. A channel access procedure may be performed prior to the

[0089] The RF unit 12 converts (down-converts) the signal received via the antenna unit 11 into a baseband signal by quadrature demodulation, and removes unnecessary frequency components. The analog signal processed by the digital signal processing unit 12 is output to the baseband unit 13 .

[0090] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 extracts a cyclic prefix (CP) from the converted digital signal. The signal from which the CP has been removed is subjected to a fast Fourier transform (FFT) to extract the signal in the frequency domain.

[0091] The baseband unit 13 performs an inverse fast Fourier transform (IFFT) on the uplink data to generate an OFDM symbol, and adds a CP to the generated OFDM symbol. The baseband unit 13 converts the baseband digital signal into an analog signal, and outputs the converted analog signal to the RF unit 12.

[0092] The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, and up-converts the analog signal to a carrier frequency. The RF unit 12 converts the received signal into a digital signal and transmits it via the antenna unit 11. The RF unit 12 may also have a function to control transmission power. The RF unit 12 is also referred to as a transmission power control unit.

[0093] The physical signals (signals) will be explained below.

[0094] The physical signal is a general term for a downlink physical channel, a downlink physical signal, an uplink physical channel, and an uplink physical channel. The physical channel is a general term for a downlink physical channel and an uplink physical channel. The physical signal is a general term for a downlink physical signal and an uplink physical signal.

[0095] The uplink physical channel may correspond to a set of resource elements that convey information generated in a higher layer. The uplink physical channel may be a physical channel used in an uplink component carrier. The uplink physical channel may be transmitted by a terminal device 1. The uplink physical channel may be received by a base station device 3. In a wireless communication system according to one aspect of the present embodiment, at least some or all of the following uplink physical channels may be used. ·PUCCH (Physical Uplink Control CHannel) ·PUSCH (Physical Uplink Shared CHannel) ·PRACH(Physical Random Access CHannel)

[0096] PUCCH is used to transmit uplink control information (UCI). The PUCCH may be used. The PUCCH may be transmitted to deliver (deliver, transmit, convey) uplink control information. The uplink control information may be mapped to the PUCCH. The terminal device 1 may transmit the PUCCH in which the uplink control information is mapped. Base station The device 3 may receive a PUCCH in which the uplink control information is arranged.

[0097] Uplink control information (uplink control information bit, uplink control information sequence, uplink control information type) is used in combination with channel state information (CSI), schedule The packet contains at least part or all of the Scheduling Request (SR) and Hybrid Automatic Repeat request ACKnowledgement (HARQ-ACK) information.

[0098] The channel state information is also referred to as a channel state information bit or a channel state information sequence. The scheduling request is also referred to as a scheduling request bit or a scheduling request sequence. The HARQ-ACK information is also referred to as a HARQ-ACK information bit or a HARQ-ACK information sequence.

[0099] The HARQ-ACK information may include at least a HARQ-ACK corresponding to a transport block (TB). The HARQ-ACK may indicate an acknowledgement (ACK) or a negative acknowledgement (NACK) corresponding to the transport block. The ACK may indicate that the transport block has been decoded successfully. The NACK may indicate that the transport block has not been decoded successfully. The HARQ-ACK information may include a HARQ-ACK codebook including one or more HARQ-ACK bits.

[0100] A transport block is a sequence of information bits delivered from higher layers. Here, the sequence of information bits is also called a bit sequence. Here, the transport block may be transmitted via an Uplink-Shared Channel (UL-SCH) in the transport layer.

[0101] One information bit may indicate "0" or "1". A field included in the DCI format may consist of one or more information bits. The unit of the number of information bits is the bit. The n information bits may represent a value up to the power of 2^n.

[0102] HARQ-ACK for a transport block may be referred to as HARQ-ACK for a PDSCH. In this case, the "HARQ-ACK for PDSCH" is transmitted to the transport included in the PDSCH. Indicates the HARQ-ACK for the block.

[0103] The HARQ-ACK may indicate an ACK or NACK corresponding to one Code Block Group (CBG) included in the transport block.

[0104] A scheduling request is a request to retrieve the UL-SCH for a new transmission. The scheduling request bit may be used at least to request a resource. The scheduling request bit may be used to indicate either a positive SR or a negative SR. When the scheduling request bit indicates a positive SR, this is also referred to as "a positive SR is transmitted." A positive SR indicates that the terminal device 1 is to transmit a UL-SCH A positive SR may indicate that resources of UL-SCH are requested for initial transmission. A positive SR may indicate that a scheduling request is triggered by a higher layer. A positive SR may be transmitted when a scheduling request is indicated by a higher layer. When the scheduling request bit indicates a negative SR, this is also referred to as "a negative SR is transmitted." A negative SR may indicate that no resources of UL-SCH are requested by the terminal device 1 for initial transmission. A negative SR may indicate that no resources of UL-SCH are requested for initial transmission by the terminal device 1. A positive SR may indicate that no scheduling request is triggered by higher layers. A negative SR may be conveyed when no scheduling request is indicated by higher layers.

[0105] The channel state information may include at least some or all of a Channel Quality Indicator (CQI), a Precoder Matrix Indicator (PMI), and a Rank Indicator (RI). The CQI is an indicator related to the quality of a propagation path (e.g., propagation strength) or the quality of a physical channel, and the PMI is an indicator related to a precoder. RI is an index related to the transmission rank (or the number of transmission layers).

[0106] The channel state information is an indicator of the reception state of at least the physical signal (e.g., CSI-RS) used for channel measurement. The value of the channel state information is used for channel measurement. The channel measurement may be determined by the terminal device 1 based on the reception conditions assumed by at least the physical signals used for the channel measurement. The channel measurement may include an interference measurement.

[0107] The PUCCH may correspond to a PUCCH format. The PUCCH may be a set of resource elements used to convey the PUCCH format. The PUCCH may include a PUCCH format. The PUCCH may be transmitted with a certain PUCCH format. The PUCCH format may be interpreted as a format of information. The PUCCH format may also be interpreted as a set of information set in a certain information format.

[0108] The PUSCH carries transport blocks and / or uplink control information. The transport block may be placed on the PUSCH. The transport block delivered by the UL-SCH may be arranged in the PUSCH. The uplink control information may be arranged in the PUSCH. A PUSCH in which one or both of the uplink control information and the PUSCH are arranged may be transmitted. The base station device 3 may receive a PUSCH in which one or both of a transport block and uplink control information are allocated.

[0109] The PRACH may be transmitted to carry a random access preamble. The base station device 1 may transmit the PRACH. The base station device 3 may receive the PRACH. column x u,v (n) is x u,v (n)=x u(mod(n+C v ,L RA )), where x u is a ZC (Zadoff-Chu) sequence. u x u =exp(-jπui(i+1) / L RA ) by j is the imaginary unit. Also, π is the ratio of the circumference of a circle to its circumference. Also, C v corresponds to the cyclic shift of the PRACH sequence. RA corresponds to the length of the PRACH sequence. RA is 839 or 139. Also, i ranges from 0 to L RA -1 and u is the sequence index for the PRACH sequence.

[0110] For each PRACH opportunity, 64 random access preambles are defined. The access preamble is the cyclic shift C of the PRACH sequence. v , and the sequence index u for the PRACH sequence. An index may be assigned to each of the bulls.

[0111] The uplink physical signal may correspond to a set of resource elements. The uplink physical signal does not have to be used to transmit information generated in a higher layer. The uplink physical signal may be used to transmit information generated in a physical layer. The uplink physical signal may be a physical signal used in an uplink component carrier. The terminal device 1 may transmit the uplink physical signal. The base station device 3 may receive the uplink physical signal. In a wireless communication system according to one aspect of the present embodiment, at least some or all of the following uplink physical signals may be used. ·UL DMRS(UpLink Demodulation Reference Signal) ·SRS(Sounding Reference Signal) ·UL PTRS(UpLink Phase Tracking Reference Signal)

[0112] UL DMRS is a general term for DMRS for PUSCH and DMRS for PUCCH.

[0113] The set of antenna ports for DMRS for PUSCH (DMRS related to PUSCH, DMRS included in PUSCH, DMRS corresponding to PUSCH) is given based on the set of antenna ports for the PUSCH. For example, the set of antenna ports of a DMRS for a PUSCH may be the same as the set of antenna ports for the PUSCH.

[0114] The transmission of the PUSCH and the transmission of the DMRS for the PUSCH are indicated by one DCI format. The PUSCH and the DMRS for the PUSCH may be collectively referred to as a PUSCH. Transmitting the PUSCH may be equivalent to transmitting the PUSCH and the DMRS for the PUSCH.

[0115] The propagation path of the PUSCH may be estimated from the DMRS for the PUSCH.

[0116] The set of antenna ports for DMRS for PUCCH (DMRS related to PUCCH, DMRS included in PUCCH, DMRS corresponding to PUCCH) may be the same as the set of antenna ports for PUCCH. stomach.

[0117] The transmission of the PUCCH and the transmission of the DMRS for the PUCCH are indicated by one DCI format. Mapping of PUCCH to resource elements (resource element mapping), and to the resource elements of the DMRS for the PUCCH One or both of the mappings may be provided by one PUCCH format. The PUCCH and the DMRS for the PUCCH may be collectively referred to as the PUCCH. This may involve transmitting a PUCCH and a DMRS for the PUCCH.

[0118] The propagation path of the PUCCH may be estimated from the DMRS for the PUCCH.

[0119] The downlink physical channel may correspond to a set of resource elements that convey information generated in a higher layer. The downlink physical channel may be a physical channel used in a downlink component carrier. The base station device 3 may transmit the downlink physical channel. The terminal device 1 may receive the downlink physical channel. In a wireless communication system according to one aspect of this embodiment, at least some or all of the following downlink physical channels may be used. ·PBCH(Physical Broadcast Channel) ·PDCCH (Physical Downlink Control Channel) ·PDSCH(Physical Downlink Shared Channel)

[0120] The PBCH may be transmitted to convey one or both of a Master Information Block (MIB) and physical layer control information. Here, the physical layer control information is information generated in the physical layer. The MIB is a set of parameters placed on a Broadcast Control Channel (BCCH), which is a logical channel of the MAC layer. The BCCH is a channel of the transport layer. The MIB and / or physical layer control information may be mapped to a certain BCH. The BCH may be mapped to a PBCH. The terminal device 1 may receive a PBCH in which one or both of the MIB and the physical layer control information are mapped. The base station device 3 may transmit a PBCH in which one or both of the MIB and the physical layer control information are mapped. stomach.

[0121] For example, the physical layer control information may be configured with 8 bits. The physical layer control information may include at least some or all of the following 0A to 0D. 0A) Radio frame bit 0B) Half radio frame (half system frame, half frame) bit 0C) SS / PBCH block index bit 0D) Subcarrier offset bit

[0122] The radio frame bits are used to indicate the radio frame in which the PBCH is transmitted (the radio frame including the slot in which the PBCH is transmitted). The radio frame bits include 4 bits. The radio frame bits may be configured by 4 bits of a 10-bit radio frame indicator. For example, the radio frame indicator may be used to identify at least radio frames with index 0 to index 1023.

[0123] The half radio frame bit is used to indicate whether the PBCH is transmitted in the first five subframes or the last five subframes of a radio frame in which the PBCH is transmitted. Here, a half radio frame may be configured to include five subframes. Alternatively, a half radio frame may be configured to include the first five subframes of ten subframes included in a radio frame. Alternatively, a half radio frame may be configured to include the last five subframes of ten subframes included in a radio frame.

[0124] The SS / PBCH block index bits are used to indicate the SS / PBCH block index. The SS / PBCH block index bits include 3 bits. The SS / PBCH block index bits may be configured with 3 bits of a 6-bit SS / PBCH block index indicator. The SS / PBCH block index indicator may be used at least to identify SS / PBCH blocks from index 0 to index 63.

[0125] The subcarrier offset bit is used to indicate a subcarrier offset, which may be used to indicate the difference between the first subcarrier to which the PBCH is mapped and the first subcarrier to which the control resource set with index 0 is mapped.

[0126] The PDCCH may be transmitted to convey downlink control information (DCI). The downlink control information may be mapped to the PDCCH. The base station device 3 may receive the PDCCH in which the downlink control information is arranged. A PDCCH in which downlink control information is allocated may be transmitted.

[0127] The downlink control information may be transmitted with a DCI format. The DCI format may be interpreted as a format of the downlink control information. The DCI format may be It may also be interpreted as a set of downlink control information set in a certain downlink control information format.

[0128] DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1 are DCI formats. The downlink DCI format is a general term for DCI format 0_0 and DCI format 0_1. The downlink DCI format is a general term for DCI format 1_0 and DCI format 1_1.

[0129] DCI format 0_0 is used at least for scheduling PUSCHs allocated to a cell. DCI format 0_0 is used for scheduling some of the fields from 1A to 1E or It consists of at least all of the above. 1A) Identifier field for DCI formats 1B) Frequency domain resource assignment field field) 1C) Time domain resource assignment field 1D) Frequency hopping flag field 1E) MCS field (Modulation and Coding Scheme field)

[0130] The DCI format specific field is a DCI format specific field. The DCI format specification field may indicate whether the format is an uplink DCI format or a downlink DCI format. That is, the DCI format specification field may be included in each of the uplink DCI format and the downlink DCI format. Here, the DCI format specification field included in DCI format 0_0 may indicate 0.

[0131] The frequency domain resource allocation field included in DCI format 0_0 may be used to indicate the allocation of frequency resources for the PUSCH.

[0132] The time domain resource allocation field included in DCI format 0_0 may be used to indicate the allocation of time resources for the PUSCH.

[0133] The frequency hopping flag field indicates whether frequency hopping is applied to the PUSCH. It may be used to indicate whether or not

[0134] The MCS field included in DCI format 0_0 specifies the modulation scheme for PUSCH, and , and the target coding rate for the transport block placed on the PUSCH. The size of the transport block (TBS) allocated to the PUSCH may be determined based on the target coding rate and one or more of the modulation schemes for the PUSCH. may be determined based on both.

[0135] DCI format 0_0 does not include fields used for CSI requests. It's not necessary.

[0136] DCI format 0_0 may not include a carrier indicator field. That is, the serving cell to which the uplink component carrier on which the PUSCH scheduled by DCI format 0_0 is allocated belongs uses the DCI format 0_0. The serving cell is the same as the uplink component carrier on which the PDCCH including the The terminal device 1 may transmit a PUSCH scheduled in accordance with the DCI format 0_0 to an uplink component carrier of a serving cell based on detecting the DCI format 0_0 in a downlink component carrier of the serving cell. It may be recognized that the carrier may be placed.

[0137] DCI format 0_0 may not include the BWP field. The DCI format 0_0 may be a DCI format for scheduling a PUSCH without changing the active uplink BWP. The terminal device 1 may recognize that the PUSCH is to be transmitted without switching the active uplink BWP based on detecting the DCI format 0_0 used for scheduling the PUSCH.

[0138] DCI format 0_1 ​​is used at least for scheduling PUSCHs allocated to a cell. DCI format 0_1 ​​is used for part of fields 2A to 2H or It consists of at least all of the above. 2A) DCI format specific fields 2B) Frequency domain resource allocation field 2C) Uplink time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS Field 2F) CSI request field 2G) BWP field 2H) Carrier indicator field

[0139] The DCI format specific field included in DCI format 0_1 ​​may indicate 0.

[0140] The frequency domain resource allocation field included in DCI format 0_1 ​​may be used to indicate the allocation of frequency resources for the PUSCH.

[0141] The time domain resource allocation field included in DCI format 0_1 ​​may be used to indicate the allocation of time resources for the PUSCH.

[0142] The MCS field included in DCI format 0_1 ​​specifies the modulation scheme for PUSCH, and and / or may at least be used to indicate some or all of the target code rate.

[0143] The BWP field of DCI format 0_1 ​​is the The DCI format 0_1 ​​may be used to indicate an uplink BWP in which a PUSCH to be scheduled is arranged. That is, the DCI format 0_1 ​​may involve a change of the active uplink BWP. The terminal device 1 may recognize the uplink BWP in which the PUSCH is arranged based on detecting the DCI format 0_1 ​​used for scheduling the PUSCH.

[0144] DCI format 0_1, which does not include the BWP field, is used to change the active uplink BWP. The terminal device 1 may use a DCI format 0_1 ​​used for scheduling the PUSCH and a DCI format that does not include the BWP frame. Based on detecting the DCI format D0_1 that does not include the field, it may be recognized that the PUSCH is to be transmitted without switching the active uplink BWP.

[0145] DCI format 0_1 ​​includes a BWP field, but terminal device 1 does not include the DCI format If the terminal device 1 does not support the BWP switching function by 0_1, the BWP field may be ignored by the terminal device 1. In other words, the terminal device 1 that does not support the BWP switching function , DCI format 0_1 ​​used for PUSCH scheduling and BWP format Based on detecting the DCI format 0_1 ​​including the field, the terminal device 1 may recognize that it will transmit the PUSCH without switching the active uplink BWP. If the terminal device 1 supports the BWP switching function, it may report that "the terminal device 1 supports the BWP switching function" in the RRC layer capability information reporting procedure.

[0146] The CSI request field is used to indicate the reporting of CSI.

[0147] If DCI format 0_1 ​​includes a carrier indicator field, The rear indicator field indicates the uplink component carrier in which the PUSCH is located. DCI format 0_1 ​​may be used to indicate a carrier indicator. If the field is not included, the uplink component carrier on which the PUSCH is allocated is A PDCCH including DCI format 0_1 ​​used for scheduling the PUSCH is arranged. When the number of uplink component carriers configured in the terminal device 1 in a certain serving cell group is two or more, When the PUSCH is scheduled to be allocated to a certain serving cell group (when uplink carrier aggregation is implemented in the certain serving cell group), The carrier indicator field included in DCI format 0_1 ​​used for The number of bits may be 1 or more (for example, 3 bits). When the number of uplink component carriers configured in the terminal device 1 in a certain serving cell group is 1 (when uplink carrier aggregation is not operated in a certain serving cell group), the scheduling of the PUSCH allocated to the certain serving cell group Carrier indicator field included in DCI format 0_1 ​​used for The number of bits in the carrier indicator field may be 0 (or the DCI format 0_1 ​​used for scheduling the PUSCH allocated to the certain serving cell group may not include the carrier indicator field).

[0148] DCI format 1_0 is used at least for scheduling PDSCHs allocated to a certain cell. DCI format 1_0 may use at least some or all of 3A to 3F. It also includes the following: 3A) DCI Format Specific Fields 3B) Frequency domain resource allocation field 3C) Time Domain Resource Allocation Field 3D) MCS field 3E) PDSCH_HARQ feedback timing indicator field 3F) PUCCH resource indicator field

[0149] The DCI format specific field included in DCI format 1_0 may indicate 1.

[0150] The frequency domain resource allocation field included in DCI format 1_0 may be used at least to indicate the allocation of frequency resources for the PDSCH.

[0151] The time domain resource allocation field included in DCI format 1_0 may be used at least to indicate the allocation of time resources for the PDSCH.

[0152] The MCS field (MCS) included in DCI format 1_0 may be used to indicate at least one of a modulation scheme and a target coding rate for the PDSCH. The target coding rate is a target coding rate for a transport block allocated to the PDSCH. The size of the transport block (TBS) allocated to the PDSCH may be determined based on the target coding rate and one of the modulation schemes for the PDSCH. Or it may be determined based on both.

[0153] The PDSCH_HARQ feedback timing indication field specifies the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH. It may also be used to indicate a

[0154] The PUCCH resource indication field may be a field indicating an index of one or more PUCCH resources included in a PUCCH resource set. A PUCCH resource set may include one or more PUCCH resources.

[0155] DCI format 1_0 may not include a carrier indicator field. That is, the downlink component carrier on which the PDSCH scheduled by DCI format 1_0 is arranged is the downlink component carrier on which the PDCCH including the DCI format 1_0 is arranged. The terminal device 1 may detect DCI format 1_0 in a certain downlink component carrier, and based on this, may transmit a PDSCH scheduled in accordance with the DCI format 1_0 to the downlink component carrier. It may be recognized that the carrier may be placed.

[0156] DCI format 1_0 may not include the BWP field. The DCI format 1_0 may be a DCI format for scheduling the PDSCH without changing the active downlink BWP. The terminal device 1 may recognize that it will receive the PDSCH without switching the active downlink BWP based on detecting the DCI format 1_0 used for scheduling the PDSCH.

[0157] DCI format 1_1 is used at least for scheduling PDSCHs allocated to a certain cell. DCI format 1_1 includes at least some or all of 4A to 4I. It also includes the following: 4A) DCI Format Specific Fields 4B) Frequency domain resource allocation field 4C) Time Domain Resource Allocation Field 4E) MCS Field 4F) PDSCH_HARQ feedback timing indication field 4G) PUCCH resource indication field 4H) BWP Field 4I) Career Indicator Field

[0158] The DCI format specific field included in DCI format 1_1 may indicate 1.

[0159] The frequency domain resource allocation field included in DCI format 1_1 may be used at least to indicate the allocation of frequency resources for the PDSCH.

[0160] The time domain resource allocation field included in DCI format 1_1 may be used at least to indicate the allocation of time resources for the PDSCH.

[0161] The MCS field (MCS) included in DCI format 1_1 may be used to indicate at least one or both of the modulation scheme and the target coding rate for the PDSCH.

[0162] When DCI format 1_1 includes a PDSCH_HARQ feedback timing indication field, the PDSCH_HARQ feedback timing indication field shall be set from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH. If DCI format 1_1 does not include a PDSCH_HARQ feedback timing indication field, the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH may be specified by a parameter of a higher layer.

[0163] The PUCCH resource indication field may be a field indicating an index of one or more PUCCH resources included in a PUCCH resource set.

[0164] The BWP field of DCI format 1_1 is the In other words, DCI format 1_1 may involve a change in the active downlink BWP. The terminal device 1 may determine whether the DCI format 1_1 is used for scheduling the PDSCH based on detecting DCI format 1_1. Based on this, the downlink BWP in which the PUSCH is arranged may be recognized.

[0165] DCI format 1_1, which does not include the BWP field, is used to change the active downlink BWP. The terminal device 1 may use a DCI format 1_1 that is used for scheduling the PDSCH and that is not accompanied by a BWP frame. The active downstream link is determined based on detecting DCI format 1_1 that does not include the It may be possible to recognize that the PDSCH is received without switching the link BWP.

[0166] DCI format 1_1 includes a BWP field, but terminal device 1 does not If the terminal device 1 does not support the BWP switching function by 1_1, the BWP field may be ignored by the terminal device 1. In other words, the terminal device 1 that does not support the BWP switching function , DCI format 1_1 used for PDSCH scheduling and BWP format Based on detecting the DCI format 1_1 including the field, the terminal device 1 may recognize that it will receive the PDSCH without switching the active downlink BWP. If the terminal device 1 supports the BWP switching function, it may report that "the terminal device 1 supports the BWP switching function" in the RRC layer capability information reporting procedure.

[0167] If DCI format 1_1 includes a carrier indicator field, The rear indicator field indicates the downlink component carrier on which the PDSCH is located. DCI Format 1_1 may be used to indicate a carrier indicator. If the field is not included, the downlink component carrier on which the PDSCH is allocated is A PDCCH including DCI format 1_1 used for scheduling the PDSCH is arranged. When the number of downlink component carriers configured in the terminal device 1 in a certain serving cell group is two or more (when downlink carrier aggregation is operated in a certain serving cell group), the scheduling of the PDSCH allocated to the certain serving cell group may be the same as the downlink component carrier configured in the certain serving cell group. The carrier indicator field included in DCI format 1_1 used for The number of bits may be 1 or more (for example, 3 bits). When the number of downlink component carriers configured in the terminal device 1 in a certain serving cell group is 1 (when downlink carrier aggregation is not operated in a certain serving cell group), the scheduling of the PDSCH arranged in the certain serving cell group Carrier indicator field included in DCI format 1_1 used for The number of bits in may be 0 (or the carrier indicator field may not be included in DCI format 1_1 used for scheduling the PDSCH allocated to the certain serving cell group).

[0168] The PDSCH may be transmitted to transmit a transport block. The PDSCH may be used to transmit a transport block delivered by the DL-SCH. The PDSCH may be used to transmit a transport block. The transport block may be placed on the PDSCH. The transport block corresponding to the DL-SCH is placed on the PDSCH. The base station device 3 may transmit the PDSCH, and the terminal device 1 may receive the PDSCH.

[0169] The downlink physical signal may correspond to a set of resource elements. The downlink physical signal may not carry information generated in a higher layer. The downlink physical signal may be a physical signal used in a downlink component carrier. The downlink physical signal may be transmitted by a base station device 3. The downlink physical signal may be transmitted by a terminal device 1. In a wireless communication system according to one aspect of this embodiment, at least some or all of the following downlink physical signals may be used. ·Synchronization signal (SS) ·DL DMRS(DownLink DeModulation Reference Signal) ·CSI-RS(Channel State Information-Reference Signal) ·DL PTRS(DownLink Phase Tracking Reference Signal)

[0170] The synchronization signal may be used by the terminal device 1 to synchronize one or both of the frequency domain and the time domain of the downlink. The synchronization signal is a general term for a PSS (Primary Synchronization Signal) and an SSS (Secondary Synchronization Signal).

[0171] FIG. 7 is a diagram showing an example of the configuration of an SS / PBCH block according to one aspect of this embodiment. In FIG. 7, the horizontal axis is the time axis (OFDM symbol index l sym ), where the vertical axis represents the frequency domain. Block 700 represents a set of resource elements for the PSS. Block 720 shows the set of resource elements for SSS. Blocks 710, 711, 712, and 713 indicate a set of resource elements for the PBCH and DMRS for the PBCH (DMRS associated with the PBCH, DMRS included in the PBCH, and DMRS corresponding to the PBCH).

[0172] As shown in Figure 7, the SS / PBCH block includes a PSS, SSS, and PBCH. The SS / PBCH block includes four consecutive OFDM symbols. The SS / PBCH block includes 240 subcarriers. The PSS is the 57th to 183rd subcarriers in the first OFDM symbol. The SSS is located in the 57th to 183rd subcarriers in the third OFDM symbol. The PBCH is allocated to the 1st subcarrier of the first OFDM symbol. Zeros may be set to the 1st to 56th subcarriers of the first OFDM symbol. Zeros may be set to the 184th to 240th subcarriers of the first OFDM symbol. Zeros may be set to the 49th to 56th subcarriers of the third OFDM symbol. Zeros may be set to the 184th to 192nd subcarriers of the third OFDM symbol. The PBCH is allocated to the 1st to 240th subcarriers of the second OFDM symbol, which are subcarriers where DMRS for the PBCH is not allocated. The PBCH is allocated to the 1st to 48th subcarriers of the third OFDM symbol, which are subcarriers where DMRS for the PBCH is not allocated. The PBCH is allocated to the 193rd to 240th subcarriers of the third OFDM symbol, which are subcarriers where DMRS for the PBCH is not allocated. The PBCH is allocated to the 1st to 240th subcarriers of the fourth OFDM symbol, which are subcarriers to which the DMRS for the PBCH is not allocated.

[0173] The antenna ports for the PSS, SSS, PBCH, and DMRS for the PBCH may be the same.

[0174] The PBCH on which the PBCH symbol is transmitted at a certain antenna port may be estimated by the DMRS for the PBCH that is placed in the slot to which the PBCH is mapped and is included in the SS / PBCH block to which the PBCH belongs.

[0175] DL DMRS is a general term for DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH.

[0176] The set of antenna ports for DMRS for PDSCH (DMRS related to PDSCH, DMRS included in PDSCH, DMRS corresponding to PDSCH) is given based on the set of antenna ports for the PDSCH. That is, the set of antenna ports of the DMRS for the PDSCH may be the same as the set of antenna ports for the PDSCH.

[0177] The transmission of the PDSCH and the transmission of the DMRS for the PDSCH are indicated by one DCI format. The PDSCH and the DMRS for the PDSCH may be collectively referred to as the PDSCH. Transmitting the PDSCH may be equivalent to transmitting the PDSCH and the DMRS for the PDSCH.

[0178] The propagation path of a PDSCH may be estimated from the DMRS for that PDSCH. A set of resource elements on which a DMRS symbol is transmitted and the DMRS symbol for the PDSCH are transmitted. When a set of resource elements on which symbols of a PDSCH are transmitted is included in the same precoding resource group (PRG), the PDSCH on which the symbols of the PDSCH of a certain antenna port are transmitted may be estimated by the DMRS for the PDSCH.

[0179] The antenna port of the DMRS for the PDCCH (DMRS related to the PDCCH, DMRS included in the PDCCH, DMRS corresponding to the PDCCH) may be the same as the antenna port for the PDCCH.

[0180] The PDCCH may be estimated from the DMRS for the PDCCH, i.e., the propagation path of the PDCCH may be estimated from the DMRS for the PDCCH. a set of resource elements and a resource on which the DMRS symbols for the PDCCH are transmitted; If the same precoder is applied (or is assumed to be applied) to a set of elements, the symbols of the PDCCH on a certain antenna port are transmitted. The PDCCH to be used may be estimated by the DMRS for the PDCCH.

[0181] BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel), and DL-SCH (Downlink-Shared CHannel) are transport channels. Transport channels define the relationship between physical layer channels and MAC layer channels (also called logical channels). do.

[0182] The BCH of the transport layer is mapped to the PBCH of the physical layer. The transport blocks that pass through the BCH are delivered to the PBCH of the physical layer. The UL-SCH of the transport layer is mapped to the PUSCH of the physical layer. That is, the transport block carried by the UL-SCH of the transport layer is delivered to the PUSCH of the physical layer. The DL-SCH of the transport layer is mapped to the PDSCH of the physical layer. The transport blocks that pass through are delivered to the PDSCH of the physical layer.

[0183] One UL-SCH and one DL-SCH may be provided for each serving cell. The BCH may be provided for the PCell. The BCH does not necessarily have to be provided for the PSCell or SCell.

[0184] In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) control is performed for each transport block.

[0185] BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example, BCCH is a MIB, Or, it is a channel of the RRC layer used to transmit system information. (Common Control CHannel) transmits common RRC messages to multiple terminal devices 1. Here, the CCCH may be used for, for example, a terminal device that is not RRC connected. 1. In addition, the DCCH (Dedicated Control CHannel) may be used for the terminal device. 1, where DCCH may be used to transmit RRC messages dedicated to may be used, for example, for a terminal device 1 that is in an RRC connection.

[0186] The upper layer parameters common to a plurality of terminal devices 1 are also called common upper layer parameters. Here, the common upper layer parameters may be defined as parameters specific to a serving cell. Here, the parameters specific to a serving cell are defined as parameters specific to a serving cell. Parameters common to the terminal devices (e.g., terminal devices 1-A, B, and C) for which the group cell is set It may also be a

[0187] For example, the common upper layer parameters may be included in the RRC messages delivered on the BCCH. For example, common upper layer parameters may be included in RRC messages delivered on the DCCH. .

[0188] Among certain upper layer parameters, upper layer parameters different from common upper layer parameters are also referred to as dedicated upper layer parameters. Here, the dedicated upper layer parameters can provide dedicated RRC parameters to the terminal device 1-A in which the serving cell is configured. In other words, the dedicated RRC parameters are upper layer parameters that can provide unique settings for each of the terminal devices 1-A, 1-B, and 1-C.

[0189] The BCCH of the logical channel is mapped to the BCH of the transport layer or the DL-SCH. For example, a transport block containing MIB information is delivered to the BCH of the transport layer. Also, a transport block containing non-MIB system information is delivered to the transport layer. The CCCH is delivered to the DL-SCH of the transport layer. The CCCH is also mapped to the DL-SCH or UL-SCH. Therefore, a transport block mapped to a CCCH is delivered to either the DL-SCH or the UL-SCH, and a DCCH is mapped to either the DL-SCH or the UL-SCH, i.e., a transport block mapped to a DCCH is delivered to either the DL-SCH or the UL-SCH.

[0190] The RRC message includes one or more parameters managed in the RRC layer. Here, the parameters managed in the RRC layer are also referred to as RRC parameters. For example, The message may include an MIB. The RRC message may also include system information. The RRC message may also include a message corresponding to a CCCH. The RRC message may also include a message corresponding to a DCCH. An RRC message including a message corresponding to a DCCH is also referred to as a dedicated RRC message.

[0191] The upper layer parameters are RRC parameters or parameters included in the MAC CE (Medium Access Control Element). The parameters are MIB, system information, messages corresponding to CCCH, and messages corresponding to DCCH. The parameters included in MAC CE are transmitted by a MAC CE (Control Element) command.

[0192] The procedure performed by the terminal device 1 includes at least some or all of the following steps 5A to 5C. 5A) Cell Search 5B) Random Access 5C) Data communication

[0193] The cell search is a procedure used by the terminal device 1 to synchronize with a certain cell in the time domain and the frequency domain and detect a physical cell identity. That is, the terminal device 1 may perform the cell search to synchronize with a certain cell in the time domain and the frequency domain and detect a physical cell ID.

[0194] The sequence of PSSs is based at least on a physical cell ID. The sequence of SSSs is based at least on a physical cell ID.

[0195] The SS / PBCH block candidates indicate resources on which transmission of the SS / PBCH block is permitted (possibly, reserved, configured, defined, possible).

[0196] The set of SS / PBCH block candidates in a half radio frame is also called the SS burst set. The SS burst set is a set of candidates for the transmission window. It is also called the SS transmission window, the DRS transmission window, or the Discovery Reference Signal transmission window. The SS burst set is a general term that includes at least the first SS burst set and the second SS burst set.

[0197] The base station device 3 transmits SS / PBCH blocks of one or more indexes at a predetermined period. The terminal device 1 may detect at least one of the SS / PBCH blocks of the one or more indexes and attempt to decode the PBCH included in the SS / PBCH block.

[0198] Random access is a procedure that includes at least some or all of message 1, message 2, message 3, and message 4.

[0199] Message 1 is a procedure for transmitting a PRACH by the terminal device 1. The terminal device 1 A PRACH is transmitted in one PRACH opportunity selected from one or more PRACH opportunities based at least on an index of a SS / PBCH block candidate detected based on a cell search. Each PRACH opportunity is defined based on at least time and frequency domain resources. can be.

[0200] The terminal device 1 transmits one random access preamble selected from the PRACH opportunities corresponding to the index of the SS / PBCH block candidate in which the SS / PBCH block is detected. .

[0201] Message 2 is a DCI frame with a CRC (Cyclic Redundancy Check) scrambled by the terminal device 1 with an RA-RNTI (Random Access - Radio Network Temporary Identifier). The terminal device 1 detects a control resource set provided based on the MIB included in the PBCH included in the SS / PBCH block detected based on the cell search. The DCI format is used in the resource indicated based on the search area set setting. Message 2 is also called a random access response. It is called.

[0202] Message 3 is contained in DCI format 1_0 detected by the Message 2 procedure. The PUSCH is transmitted by the random access response grant. Here, the random access response grant grant) is indicated by the MAC CE included in the PDSCH scheduled by the DCI format 1_0.

[0203] The PUSCH scheduled based on the random access response grant is Message 3 PUSCH contains a contention resolution identifier MAC CE. The contention resolution identifier MAC CE is used to identify the contention. Contains the conflict resolution ID.

[0204] Message 3 PUSCH retransmissions are scheduled with DCI format 0_0 with CRC scrambled based on TC-RNTI (Temporary Cell - Radio Network Temporary Identifier).

[0205] Message 4 is the detection of DCI format 1_0 with a CRC scrambled based on either the C-RNTI (Cell - Radio Network Temporary Identifier) ​​or the TC-RNTI. The terminal device 1 attempts to schedule based on the DCI format 1_0. The PDSCH may include a collision resolution ID.

[0206] Data communication is a general term for downlink communication and uplink communication.

[0207] In data communication, the terminal device 1 attempts to detect the PDCCH in the resources specified based on the control resource set and the search space set (monitors the PDCCH, detects the PDCCH, etc.). monitor).

[0208] A control resource set is a set of resources consisting of a predetermined number of resource blocks and a predetermined number of OFDM symbols. In the frequency domain, a control resource set may consist of contiguous resources (non-interleaved mapping) or distributed resources. (interleaver mapping).

[0209] A set of resource blocks constituting the control resource set may be indicated by a higher layer parameter, and the number of OFDM symbols constituting the control resource set may be indicated by a higher layer parameter.

[0210] The terminal device 1 attempts to detect the PDCCH in the search space set. Attempting to detect a PDCCH in the search space set may be attempting to detect a PDCCH candidate in the search space set, or attempting to detect a DCI format in the search space set. Alternatively, the PDCCH may be detected in the control resource set. Alternatively, the PDCCH may be detected in the control resource set. , it may be to attempt to detect the DCI format in the control resource set.

[0211] The search space set is defined as a set of PDCCH candidates. The search space set may be a Common Search Space (CSS) set or a UE-specific Search Space (USS) set. The terminal device 1 may select a part or a part of a Type 0 PDCCH common search space set (Type 0 PDCCH common search space set), a Type 0a PDCCH common search space set (Type 0a PDCCH common search space set), a Type 1 PDCCH common search space set (Type 1 PDCCH common search space set), a Type 2 PDCCH common search space set (Type 2 PDCCH common search space set), a Type 3 PDCCH common search space set (Type 3 PDCCH common search space set), and / or a UE-specific search space set (UE-specific search space set). Attempts to detect PDCCH candidates in all cases.

[0212] The Type 0 PDCCH common search space set is used as the common search space set with index 0. The Type 0 PDCCH common search space set may include the common search space with index 0. It may be a set.

[0213] The CSS set is a collective term for the Type 0 PDCCH common search space set, Type 0a PDCCH common search space set, Type 1 PDCCH common search space set, Type 2 PDCCH common search space set, and Type 3 PDCCH common search space set. The USS set is a UE-specific PDCCH search space set. It is also called.

[0214] A search space set is associated with (contained in, corresponds to) a control resource set. The index of the control resource set associated with the search space set may be indicated by a higher layer parameter.

[0215] For a given search area set, some or all of 6A to 6C may be indicated by at least higher layer parameters. 6A) PDCCH monitoring periodicity 6B) PDCCH monitoring pattern within a slot 6C) PDCCH monitoring offset

[0216] A monitoring occasion for a certain set of search areas is defined as The monitoring opportunity for a search space set may correspond to an OFDM symbol in which the first OFDM symbol of the associated control resource set is located. The monitoring opportunity for a search space set may correspond to resources of a control resource set associated with the search space set starting from the first OFDM symbol of the control resource set. The monitoring opportunity for the search space set is based on at least some or all of the PDCCH monitoring interval, the PDCCH monitoring pattern within the slot, and the PDCCH monitoring offset.

[0217] 8 is a diagram illustrating an example of a monitoring opportunity for a search area set according to one aspect of the present embodiment. In FIG. 8, search area set 91 and search area set 92 are set in primary cell 301, search area set 93 is set in secondary cell 302, and search area set 94 is set in secondary cell 303.

[0218] In Figure 8, the solid white blocks in primary cell 301 indicate search area set 91, the solid black blocks in primary cell 301 indicate search area set 92, the blocks in secondary cell 302 indicate search area set 93, and the blocks in secondary cell 303 indicate search area set 94.

[0219] The monitoring interval of the search area set 91 is set to 1 slot, and the monitoring interval of the search area set 91 is set to 1 slot. The offset is set to 0 slots, and the monitoring pattern of the search area set 91 is [1,0 ,0,0,0,0,0,1,0,0,0,0,0,0]. The monitoring opportunities for search area set 91 correspond to the first OFDM symbol (OFDM symbol #0) and the eighth OFDM symbol (OFDM symbol #7) in each slot.

[0220] The monitoring interval of the search area set 92 is set to 2 slots, the monitoring offset of the search area set 92 is set to 0 slots, and the monitoring pattern of the search area set 92 is [1,0 ,0,0,0,0,0,0,0,0,0,0,0,0,0]. The monitoring opportunity for search area set 92 corresponds to the first OFDM symbol (OFDM symbol #0) in each of the even slots.

[0221] The monitoring interval of the search area set 93 is set to 2 slots, the monitoring offset of the search area set 93 is set to 0 slots, and the monitoring pattern of the search area set 93 is [0,0 ,0,0,0,0,0,1,0,0,0,0,0,0]. The monitoring opportunity for search area set 93 corresponds to the eighth OFDM symbol (OFDM symbol #7) in each of the even slots.

[0222] The monitoring interval of the search area set 94 is set to 2 slots, the monitoring offset of the search area set 94 is set to 1 slot, and the monitoring pattern of the search area set 94 is set to [1,0 ,0,0,0,0,0,0,0,0,0,0,0,0,0]. The monitoring opportunity for search area set 94 corresponds to the first OFDM symbol (OFDM symbol #0) in each odd slot.

[0223] The Type 0 PDCCH common search space set may be used at least for DCI formats with a Cyclic Redundancy Check (CRC) sequence scrambled by a System Information-Radio Network Temporary Identifier (SI-RNTI).

[0224] The Type 0a PDCCH common search space set is the SI-RNTI (System Information-Radio Network Time Interference (SNTI)). CRC (Cyclic Redundancy Check) scrambled by a Temporary Identifier It may be used at least for DCI formats involving sequences.

[0225] The Type 1 PDCCH common search space set may be used at least for DCI formats with a CRC sequence scrambled by a Random Access-Radio Network Temporary Identifier (RA-RNTI) and / or a CRC sequence scrambled by a Temporary Cell-Radio Network Temporary Identifier (TC-RNTI).

[0226] A Type 2 PDCCH common search space set may be used for a DCI format with a CRC sequence scrambled by a Paging-Radio Network Temporary Identifier (P-RNTI).

[0227] The Type 3 PDCCH common search space set is used for DCI formats with CRC sequences scrambled by the Cell-Radio Network Temporary Identifier (C-RNTI). Good too.

[0228] The UE dedicated PDCCH search space set may be used at least for DCI formats with CRC sequences scrambled by the C-RNTI.

[0229] In downlink communication, the terminal device 1 detects the downlink DCI format. The detected downlink DCI format is used at least for resource allocation of the PDSCH. The detected downlink DCI format is also called a downlink assignment. The terminal device 1 attempts to receive the PDSCH. Based on the PUCCH resource indicated based on the PUCCH DCI format, the HARQ-ACK corresponding to the PDSCH (HARQ-ACK corresponding to the transport block included in the PDSCH) is reported to the base station device 3.

[0230] In uplink communication, the terminal device 1 detects the uplink DCI format. The detected DCI format is used at least for PUSCH resource allocation. The detected uplink DCI format is also called an uplink grant. The terminal device 1 transmits the PUSCH.

[0231] In the configured grant, PUSCH is scheduled. An uplink grant for scheduling is configured for each transmission period of the PUSCH. When the PUSCH is scheduled by the uplink DCI format, some or all of the information indicated by the uplink DCI format may be indicated by the uplink grant configured in the case of configured scheduling.

[0232] The UL slot may be a slot consisting of UL symbols. The special slot may be a slot consisting of UL symbols, flexible symbols, and DL symbols. The DL slot may be a slot consisting of DL symbols.

[0233] The UL symbol may be an OFDM symbol configured or indicated for uplink in time division duplex. The UL symbol may be an OFDM symbol configured or indicated for PUSCH, PUCCH, PRACH, or SRS. The UL symbol may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The UL symbol may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated. The UL slots may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The UL slots may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated. It may be provided accordingly.

[0234] The DL symbol may be an OFDM symbol configured or indicated for downlink in time division duplex. The DL symbol may be an OFDM symbol configured or indicated for PDSCH or PDCCH. ... -DL-ConfigurationCommon. The DL symbols may be provided by the higher layer parameters The DL slot may be provided by the data tdd-UL-DL-ConfigurationDedicated. DL slots may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. DL slots may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated. good.

[0235] The flexible symbols may be OFDM symbols within a certain period that are not configured or indicated as UL symbols or DL ​​symbols. The certain period may be a period given by the upper layer parameter dl-UL-TransmissionPeriodicity. The flexible symbols may be used for PDSCH, PDCCH, PUSCH, PUCCH, or PRACH. It may be an OFDM symbol set or indicated.

[0236] The upper layer parameter tdd-UL-DL-ConfigurationCommon may be a parameter that sets one or more slots as either a UL slot, a DL slot, or a special slot. The upper layer parameter tdd-UL-DL-ConfigurationDedicated may be a parameter that sets one or more slots as either a UL slot, a DL slot, or a special slot. tdd-UL-DL-ConfigurationCommon may be a common upper layer parameter. tdd-UL-DL-ConfigurationDedicated may be a dedicated upper layer parameter.

[0237] PUSCH-Config may be a dedicated upper layer parameter. PUSCH-ConfigCommon may be a common upper layer parameter. PUSCH-Config is configured per BWP for PUSCH transmission. The PUSCH-Config may include multiple higher layer parameters related to PUSCH transmission. The PUSCH-Config may be a UE-specific configuration. For example, 1A, and the PUSCH-Config for the terminal device 1B, the terminal device 1C, or the multiple higher layer parameters included in the PUSCH-Config may be different. PUSCH-ConfigCommon may be configured for each BWP for PUSCH transmission. PUSCH-ConfigCommon is a cell-specific configuration. For example, a terminal device 1A, a terminal device 1B, and a terminal device 1C in one cell may For example, PUSCH-ConfigCommon may be provided by system information.

[0238] At least two transmission schemes may be supported for the PUSCH. For example, codebook-based transmission may be one of the transmission schemes for the PUSCH. For example, non-codebook-based transmission may be one of the transmission schemes for the PUSCH. The higher layer parameters may provide either codebook transmission or non-codebook transmission. For example, if 'codebook' is set for the higher layer parameters, the terminal device 1 may be configured for codebook transmission. For example, If 'nonCodebook' is set for the upper layer parameter, the terminal device 1 may be configured for non-codebook transmission. The upper layer parameter may be txConfig. The upper layer parameter may be usage. For example, if the upper layer parameter is not set, In this case, the terminal device 1 may not expect to be scheduled by either DCI format 0_1 ​​or DCI format 0_2. When the PUSCH is scheduled by DCI format 0_0, transmission of the PUSCH may be based on at least one antenna port.

[0239] In codebook transmission, the PUSCH may be scheduled according to the DCI format. The DCI format may be any of DCI format 0_0, DCI format 0_1, and DCI format 0_2. In codebook transmission, the PUSCH may be configured to be transmitted semi-statically. The terminal device 1 may determine one or more precoders for PUSCH transmission. For example, the precoder may be determined based on at least some or all of an SRS resource indicator (SRI), a transmitted precoding matrix indicator (TPMI), and a transmission rank (transmission rank or rank). For example, the SRI may be determined based on a DCI field of an SRS resource indicator of 1 or 2. For example, the TPMI may be provided by one or two DCI fields of "Precoding information." For example, the transmission rank may be provided by the number of layers (number of transmission layers) DCI field. For example, the TPMI and transmission rank may be provided by one or two "Precoding information - number of layers" DCI fields. The SRI may be provided by a first higher layer parameter. The TPMI and transmission rank may be provided by a second higher layer parameter. The first higher layer parameter may be srs-ResourceIndicator or srs-ResourceIndicator2. The second upper layer parameter may be precodingAndNumberOfLayers or precodingAndNumberOfLayers2.

[0240] The SRS resource set applied to the PUSCH may be determined based on higher layer parameters. The PUSCH is scheduled by DCI format 0_1 ​​or DCI format 0_2. The upper layer parameter may be srs-ResourceSetToAddModList or srs-ResourceSetToAddModeListDCI-0-2. The upper layer parameter may be an upper layer parameter configured in SRS-Config.

[0241] If the upper layer parameter usage is set to 'codebook', one or two SRS resource sets are specified in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. The upper layer parameter usage may be set in the upper layer parameter SRS-ResourceSet.

[0242] When one SRS resource set is configured, the SRI and TPMI may be provided by DCI fields. The DCI fields may include one SRS resource indication and one "precoding information - number of layers" DCI field. The TPMI may be used to indicate a precoder. The precoder may be applied across v layers {0,...,v-1}. When multiple SRS resources are configured, one SRS resource may be selected by SRI. A precoder may correspond to one SRS resource. A transmit precoder (precoder) may be selected from a codebook (uplink codebook). For example, the codebook may have the number of antenna ports. The number of antenna ports may be the same as the upper layer parameter nrofSRS-Ports. The upper layer parameter txConfig is set to 'codebook'. If so, at least one SRS resource may be configured in the terminal device 1. The indicated SRI may be related to the transmission of the SRS resource identified by the SRI. For example, the indicated SRI may be related to the most recent transmission of the SRS resource identified by the SRI, and the SRS resource may be prior to the PDCCH carrying the SRI.

[0243] If two SRS resource sets are configured, one or two SRIs and one or two TPMIs are , may be given by a DCI field. For example, the DCI field may be an SRS resource indicator DCI field of "precoding information - number of layers" or DCI field of "precoding information - number of layers" The terminal device 1 may apply the indicated SRI and TPMI to one or more PUSCH repetitions. For example, the terminal device 1 may apply the indicated SRI and TPMI to the SRS resource set of the PUSCH repetition. Thus, the indicated SRI and TPMI may apply to one or more PUSCH repetitions. to direct the precoder based on the codepoint in the SRS resource set indication The precoder may be applied to the 0th to v-1th layers. The precoder may correspond to an SRS resource selected by the SRI. A resource may be configured for the applicable SRS resource set. For example, when multiple SRS resources are configured for an applied SRS resource set, the precoder may correspond to the SRS resource selected by the corresponding SRI. In one or two TPMIs, the transmission precoder (precoder) may be selected from a codebook (uplink codebook). When two SRIs are indicated, the terminal device 1 may expect the number of antenna ports for the two indicated SRS resources to be the same. The number of SRS resources may be provided by a higher layer parameter. When two SRS resources are configured and the higher layer parameter usage is set to 'codebook', the terminal device 1 does not expect that different numbers of SRS resources are configured in the two SRS resource sets. Good too.

[0244] In codebook transmission, the terminal device 1 may determine a codebook subset. For example, the codebook subset may be determined based at least on the TPMI. The codebook subset may be determined in response to receiving certain higher layer parameters. The certain higher layer parameters may be codebookSubset or codebookSubsetDCI-0-2. Certain upper layer parameters may be set to either 'fullyAndPartialAndNonCoherent', 'partialAndNonCoherent', or 'nonCoherent'. If the parameter ul-FullPowerTransmission is set to 'fullpowerMode2', and If some upper layer parameter is set to 'partialAndNonCoherent', and the code The SRS resource set for a book must contain at least one SRS resource with four ports and one SRS resource with two ports. A codebook subset associated with a two-port SRS resource (an SRS resource with two ports) may be 'nonCoherent' if it contains at least one SRS resource with a two-port. The maximum transmission rank (or maximum rank) is the upper layer parameter maxRank or This may be set for PUSCH by the parameter maxRankDCI-0-2.

[0245] The terminal device 1 may report a UE capability. If the terminal device 1 reports a UE capability of 'partialAndNonCoherent' transmission, the terminal device 1 may not expect a codebook subset having 'fullyAndPartialAndNonCoherent' to be configured.

[0246] If the terminal device 1 reports a UE capability of 'nonCoherent' transmission, the terminal device 1 may not expect a codebook subset with 'fullyAndPartialAndNonCoherent' or 'partialAndNonCoherent' to be configured.

[0247] If the upper layer parameter nrofSRS-Ports for the codebook indicates that the maximum number of SRS antenna ports to be configured is 2, the terminal device 1 determines whether 'partialAndNonCoherent' is It is not necessary to expect that the higher layer parameters to be set. The higher layer parameters may be codebookSubset or codebookSubsetForDCI-Format0-2. The number of antenna ports may be determined by the higher layer parameter nrofSRS-Ports.

[0248] In codebook transmission, one SRS resource may be determined from the SRS resource set based on the SRI, except when the first higher layer parameter is set to 'fullpowerMode2'. In this case, the maximum number of SRS resources configured for codebook transmission may be 2. The higher layer parameter of the DCI may be ul-FullPowerTransmission. The DCI may also indicate the transmission of SRS resources. For example, if aperiodic SRS is configured, the DCI may indicate The SRS request field in the SRS request field may indicate (trigger) the transmission of aperiodic SRS resources. The terminal device 1 may not expect the first upper layer parameter to be set to 'fullpowerMode1' and the second upper layer parameter to be set to 'fullAndPartialAndNonCoherent'.

[0249] The terminal device 1 uses the SRS resource indicated by the DCI format or the upper layer parameter. The PUSCH may be transmitted using one or more SRS ports (antenna ports) at the source. For example, the SRS port may be the same as the antenna port for PUSCH transmission. The DMRS antenna ports may be determined according to the ordering of the DMRS ports.

[0250] When multiple SRS resources are configured by an SRS resource set, the terminal device 1 The SRS resource set may expect the higher layer parameter nrofSRS-Ports with a value of 'codebook' to be set for these SRS resources. It may be a higher layer parameter SRS-ResourceSet with meter usage.

[0251] If 'fullpowerMode2' is set for the upper layer parameters, one or more SRS resource sets for the codebook with the same or different SRS port numbers SRS resources may be configured. If a codebook is configured and multiple SRS resource sets are configured in the SRS resource set, then at most two different spatial relations may be configured for all SRS resources in the SRS resource set for the codebook. If 'fullpowerMode2' is set for higher layer parameters, then at most two or four SRS resource sets may be configured. The SRS resource set for the codebook may be configured. Eight SRS resources may be configured in one SRS resource set. The SRS resource set for the codebook may be an SRS resource set with the upper layer parameter usage set to 'codebook'.

[0252] In non-codebook transmission, the PUSCH is DCI format 0_0, DCI format 0_1, or , may be scheduled by DCI format 0_2. In non-codebook transmission, the PUSCH may be semi-statically configured. The terminal device 1 determines the precoder and transmission rank of the PUSCH by , may be determined based on the SRI. For example, when multiple SRS resources are configured, the SRI may be given by one or two SRS resource indications in the DCI. For example, the SRI may be given by a higher layer parameter. The SRS resource set applied to the PUSCH may be defined by an entry in the higher layer parameter. The higher layer parameter may be srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. The terminal device 1 determines the precoder and transmission rank of the PUSCH based on the SRI and the antenna port field. The determination may be based on each of the following:

[0253] The terminal device 1 may use one or more SRS resources for SRS transmission. The maximum number of SRS resources in one SRS resource set may be transmitted to the base station device 3 as a UE capability. The SRS resources may be configured for simultaneous transmission in the same OFDM symbol. In one SRS resource set, the maximum number of SRS resources configured for simultaneous transmission in the same OFDM symbol and the maximum number of SRS resources may be determined by the UE capability. Multiple SRS resources transmitted simultaneously may occupy the same resource block. One SRS port may be configured in each SRS resource. One or two SRS resource sets may be configured. The SRS resource set may be set in the upper layer parameter srs-ResourceSetToAddModList with the upper layer parameter usage set to 'nonCodebook' in the upper layer parameter SRS-ResourceSet. If two SRS resource sets are configured, one or two SRIs may be given by the DCI field. The DCI field may be a DCI field for two SRS resource indications.

[0254] The terminal device 1 may apply the indicated SRI to one or more PUSCH repetitions. For example, according to the SRS resource set of the PUSCH repetition, the terminal device 1 may apply the indicated SRI to one or more PUSCH repetitions. Alternatively, it may be applied to multiple PUSCH repetitions. The maximum number of SRS resources per SRS resource set may be four. The maximum number of SRS resources per SRS resource set configured for data transmission is 8. Each of the one or two SRIs indicated is the SRS resource set identified by the SRI. The SRS transmission may be related to the latest transmission of the SRS resource in the set. The SRS transmission may be before the PDCCH carrying the SRI. Different numbers of SRS resources may be configured in the two SRS resource sets. The terminal device 1 does not need to expect this.

[0255] Multiple PDCCH candidates (PDCCH candidate(s)) are searched for and configured by higher layer parameters. When a search area set is associated with the PDCCH candidate, one PDCCH candidate is used. The upper layer parameter may be a PDCCH candidate that starts earlier among the PDCCH candidates. The upper layer parameter may be searchSpaceLinking.

[0256] For non-codebook transmission, the UE may calculate a precoder. For example, the precoder used for SRS transmission may be calculated based on measurements of the NZP CSI-RS resources. One NZP CSI-RS resource may be configured for the SRS resource set for non-codebook. For example, the SRS resource set for non-codebook may be an SRS resource set with higher layer parameters set to 'nonCodebook'.

[0257] When an aperiodic SRS resource set is configured, the NZP-CSI RS may be indicated via an SRS request field. The SRS request field may be one of the DCI fields in any of DCI format 0_1, DCI format 0_2, DCI format 1_1, and DCI format 1_2. The first higher layer parameter is aperiodic SRS The first upper layer parameter, the triggered SRS resource, srs-ResourceSetId, and csi-RS may be configured in the upper layer parameter SRS-ResourceSet. The upper layer parameter csi-RS may indicate the NZP-CSI-RS-ResourceId. The upper layer parameter SRS-ResourceSet related to the SRS request may be defined by an entry in a list that is an upper layer parameter. The list that is an upper layer parameter may be the upper layer parameter srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. The terminal device 1 may not be expected to update the precoding information (SRS precoding information). For example, if the gap from the last OFDM symbol of reception of the aperiodic NZP-CSI-RS resource to the first OFDM symbol of the aperiodic SRS transmission is 42 OFDM symbols or less, the terminal device 1 may update the precoding information. Don't expect it to be updated.

[0258] If an aperiodic SRS associated with an aperiodic NZP CSI-RS resource is configured, the presence of the associated CSI-RS may be indicated by the SRS request field. If the value of the code is not '00' and the scheduling DCI is cross-carrier scheduled, If not used for cross carrier scheduling or cross bandwidth part scheduling, the presence of CSI-RS is used for SRS request. It may be indicated by a field.

[0259] If a periodic or semi-persistent SRS resource set is configured, the NZP-CSI-RS-ResourceId for measurement may be indicated via the higher layer parameter associatedCSI-RS.

[0260] The terminal device 1 may perform one-to-one mapping. The one-to-one mapping may be a mapping from the SRI to a DMRS port and a mapping from the SRI to a corresponding PUSCH layer {0,...,v-1}. PUSCH layers from 0 to v-1 may be provided, where v may be the number of layers. The number of layers may be set by a higher layer parameter. The terminal device 1 maps the PUSCH to the same SRS port. For example, the SRS ports in the SRS resource indicated by the SRI may be indexed as pi = 1000 + i. For example, (i + 1 The SRS port in the (i+1)-th SRS resource may be pi. The SRS ports at the source may be indexed as pi, where pi is 1000+i. It is also possible.

[0261] In non-codebook transmission, the spatial relation information (info) for the SRS resource and the higher layer parameter SRS-ResourceSet for the SRS resource set are used. The terminal device 1 expects that both the upper layer parameter associatedCSI-RS and the upper layer parameter associatedCSI-RS are set. The spatial relationship information may be determined by higher layer parameters. The spatial relationship information may be the higher layer parameter spatialRelationInfo. Non-codebook In transmission, when at least one SRS resource is configured in an SRS resource set with upper layer parameters set to 'nonCodebook', terminal device 1 may be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0262] The terminal device 1 may transmit a PUSCH. The PUSCH is transmitted from antenna ports 0 to 11. PUSCH transmission may be performed on up to 8 transmission layers in antenna ports 0 to 23. PUSCH transmission may be performed on up to 8 transmission layers in antenna ports 0 to 23. It may be performed in layers.

[0263] The PUSCH may be scheduled according to a DCI format. If the PUSCH is scheduled according to a first DCI format, or if the PUSCH is scheduled according to one or more higher-order DCI formats, If transmitted before a dedicated higher layer configuration of any of the layer parameters, the terminal device 1 may assume some or all of Scenarios 1, 2, 3, 4, 5, and 6. The first DCI format may be DCI format 0_1 ​​or DCI format 0_2. The one or more higher layer parameters may be some or all of the higher layer parameter dmrs-AdditionalPosition, the higher layer parameter maxLength, and the higher layer parameter dmrs-Type.

[0264] When the PUSCH is scheduled by the second DCI format, the terminal device 1 may be configured with the higher layer parameter dmrs-Type, and the configured DMRS configuration type (configuration type) may be used for the PUSCH. When the PUSCH is scheduled by the second DCI format, the higher layer parameter dmrs-Type may be configured with the higher layer parameter DMRS-UplinkConfig. The maximum number of forward DMRS symbols for the PUSCH may be configured by the upper layer parameter maxLength. The upper layer parameter maxLength may be set to 'len1' or 'len2'. DMRS may be scheduled by DCI (DCI format). When the higher layer parameter maxLength is set to 'len1', a single-symbol DMRS (single-symbol anterior DMRS) may be scheduled for the terminal device 1 by DCI (DCI format). When the higher layer parameter maxLength is set to 'len1', the terminal device 1 is configured with an additional DMRS (Additional DMRS) for PUSCH by the higher layer parameter dmrs-AdditionalPosition set to 'pos0', 'pos1', 'pos2', or 'pos3'. If the upper layer parameter maxLength is set to 'len2', a single symbol The DCI is used to transmit the forward DMRS and double-symbol DMRS (double-symbol forward DMRS). If the higher layer parameter maxLength is set to 'len2', an additional DMRS may be configured for the PUSCH by the higher layer parameter dmrs-AdditionalPosition set to 'pos0' or 'pos1'. The terminal device 1 may be expected to transmit an additional DMRS. The second DCI format is a PDCCH with a CRC scrambled by C-RNTI, MCS-C-RNTI, or CS-RNTI. The DCI format may be DCI format 0_1 ​​or DCI format 0_2.

[0265] In the DMRS configuration type 1, in the first case, the second case, or the third case, the terminal device 1 determines whether one or more antenna ports are connected to other terminal devices. In the first case, it may be assumed that the terminal device 1 is not related to a PUSCH transmission. Scheduled by codeword and terminal 1 is in {2, 9, 10, 11, 30} In the second case, the terminal device 1 is scheduled with one codeword, and the terminal device 1 is assigned to one of the indexes {2, 9, 10, 11, 12} (values ​​in the antenna port field). In the third case, the terminal device 1 schedules with two codes. One or more antenna ports may be orthogonal to the remaining antenna ports. In the first case, when terminal device 1 is scheduled with one codeword and DMRS extension is not applied, terminal device 1 receives the indexes {2, 9, 10, 11, 30}. In the first case, when the terminal device 1 is scheduled with one codeword, and when the DMRS extension is applied and the upper layer parameter maxLength is 1, the terminal device 1 may be assigned with antenna ports mapped to indices (values ​​of the antenna port field) of {2, 9, 10, 11, 18, 19, 20}. In the first case, it may be determined based on whether DMRS extensions are applied and the higher layer parameter maxLength. stomach.

[0266] The DMRS extension is applied when the higher layer parameter ExtendedDMRSports is set. The DMRS extensions may be applied if the higher layer parameter ExtendedDMRSports is It may be set to valid. The terminal device 1 reports a certain capability. If the terminal device 1 does not report the capability, the DMRS extension may be applied. If the terminal device 1 does not report the capability, the DMRS extension may not be applied. The terminal device 1 may not expect that DMRS extensions are applied. For example, the certain capability may be It may be reported for either the uplink or the downlink, or both. For example, the higher layer parameter ExtendedDMRSports may be reported for either the uplink or the downlink, or both. For example, the upper layer parameter ExtendedDMRSports may be set for It may be set in the higher layer parameter DMRS-DownlinkConfig, or it may be set in the higher layer parameter DMRS-UplinkConfig.

[0267] Whether DMRS demodulation assistance is applied may be indicated by the DCI format. For example, whether DMRS demodulation assistance is applied depends on the DCI format 1_1 and the DCI format For example, if DMRS demodulation assistance is applied, the signal may be signaled by one or both of the demodulation signals 1 and 2. Whether or not this is done may be indicated by one or both of DCI format 0_1 ​​and DCI format 0_2.

[0268] In DMRS configuration type 2, in the fourth case, the fifth case, or the third case, the terminal device 1 may assume that one or more antenna ports are not associated with PUSCH transmission to other terminal devices. In the fourth case, the terminal device 1 may assume that one or more antenna ports are not associated with PUSCH transmission to other terminal devices. In the fifth case, the terminal device 1 may be scheduled with one codeword, and the terminal device 1 may be assigned with an antenna port that is mapped to any index (DMRS port, DMRS port index) of {2, 10, 23}. and the terminal device 1 is assigned to one of the indices {2, 10, 23, 58} (DMRS Assigned by antenna port that is mapped to the DMRS port index This may also be the case.

[0269] The terminal device 1 receives a double-symbol anterior DMRS (double-symbol anterior DMRS symbol) and a 2 It is not necessary to expect that more than two additional DMRS symbols (additional DMRS symbols) are configured at the same time. , 'len2' is set by the upper layer parameter maxLength The additional DMRS is given by the higher layer parameter dmrs-AdditionalPosition. That's fine.

[0270] The higher layer parameter dmrs-Type being 1 means that DMRS configuration type 1 is configured. The higher layer parameter dmrs-Type being 2 means that DMRS configuration type 2 is configured. When the upper layer parameter maxLength is 1, the maximum number of forward DMRS symbols may be 1 symbol. When the upper layer parameter maxLength is 2, the maximum number of forward DMRS symbols may be 1 symbol. For example, the maximum number of forward DMRS symbols may be two. The layer parameter maxLength is 1, which means that the single-symbol forward DMRS (forward DMRS single) For example, the upper layer parameter maxLength is set to 2. That is, a single-symbol forward DMRS (forward DMRS symbol) or a double-symbol forward DMRS may be configured.

[0271] The DMRS transmission procedure for a PUSCH scheduled on a first PDCCH with a first DCI format may be applied to a PUSCH scheduled on a second PDCCH with a second DCI format, which may be DCI format 0_1. The second DCI format may be DCI format 0_2.

[0272] If the transmitted PUSCH is scheduled by DCI format 0_0, the terminal device Position 1 uses a single-symbol forward DMRS with DMRS setting type 1 on DMRS port 0. The transmitted PUSCH may be a DCI packet with a CRC scrambled by the first RNTI. - Corresponds to grants that are not scheduled and set by mat 0_1 / 0_2 If the PUSCH is not for the Type 2 random access procedure, the terminal device 1 A single-symbol forward DMRS of DMRS configuration type 1 on port 0 may be used, and the remaining resource elements not used for DMRS may be used for the first PUSCH transmission. If transform precoding is not applied, the first PUSCH transmission may not be a PUSCH with an allocation duration of 2 or 1 OFDM symbols. The additional DMRS may be transmitted according to the scheduling type and PUSCH period. The first RNTI is C-RNTI. , CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI.

[0273] If frequency hopping is not applied, the higher layer parameter dmrs-AdditionalPosition is It may be assumed that the upper layer parameter dmrs-AdditionalPosition is equal to 'pos1' and that up to two additional DMRSs are transmitted according to the PUSCH period. If frequency hopping is applied, the upper layer parameter dmrs-AdditionalPosition is equal to 'pos1' and that up to one additional DMRS is transmitted according to the PUSCH period. It may be expected that.

[0274] PUSCH is scheduled with DCI format 0_0 with CRC scrambled with CS-RNTI. When the DMRS port is 0, the terminal device 1 may use a single-symbol forward DMRS in the DMRS port 0. The single-symbol forward DMRS is provided by the higher layer parameter dmrs-Type. It may correspond to the DMRS configuration type.

[0275] One or two scrambling identities are configured by higher layer parameters. The scrambling ID may be used for both PUSCH mapping type A and PUSCH mapping type B.

[0276] PUSCH is scrambled using C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI. It may be scheduled by DCI format 0_1 ​​with CRC to be determined.

[0277] The upper layer parameter dmrs-Type may be set. The DMRS configuration type to be set is PUSCH. It may be used for transmission.

[0278] The maximum number of forward DMRSs for PUSCH may be configured by a first higher layer parameter. The first upper layer parameter may be an upper layer parameter maxLength, If the first higher layer parameter is not configured, single-symbol forward DMRS is scheduled by DCI. The number of additional DMRSs for the PUSCH may be configured by a second higher layer parameter, or may be configured by a configured grant configuration (configured grant). The second upper layer parameter may be 'pos0', 'pos1', 'pos2', 'pos3'. For example, if the first upper layer parameter is not set, the second upper layer parameter may be 'pos0', 'pos1', 'pos2', 'pos3'. The second upper layer parameter may be dmrs-AdditionalPosition. If the first upper layer parameter is set, the single Single-symbol forward DMRS (single-symbol DMRS) or double-symbol forward DMRS (double-symbol DMRS) The bull symbol (DMRS) may be scheduled by DCI or configured by a configured grant. When the first higher layer parameter is configured, the second higher layer parameter may be 'pos0', 'pos1'.

[0279] When the terminal device 1 transmitting the first PUSCH is set by the upper layer parameter phaseTrackingRS, In this case, the terminal device 1 may assume that the first configuration and the second configuration do not occur simultaneously for the PUSCH to be transmitted. The first configuration may be a DMRS configuration type 2. In this case, 6 to 11 DMRS ports may be scheduled. The second setting may be that the PTRS is transmitted in DCI format 0_2. The first PUSCH may be a PUSCH scheduled by the DCI format. The first configuration may be DMRS ports 4 to 7 and 12 in the case of DMRS configuration type 1. The first configuration may be that any of DMRS ports 6 to 11 and DMRS ports 18 to 23 are scheduled in the case of DMRS configuration type 1. The first configuration may be that any of DMRS ports 4 to 7 and DMRS ports 18 to 23 are scheduled in the case of DMRS configuration type 1 and DMRS extensions are applied. The first configuration may be for DMRS configuration type 1 and when DMRS extension is applied, it may be for DMRS ports 6 to 11 and DMRS ports 18 to 23 to be scheduled.

[0280] PUSCH is the first DCI format or the uplink grant configured with Type 1 configuration. If scheduled by a grant (configured grant Type 1 configuration), the The terminal device 1 may assume that the first CDM group for DMRS is not used for data transmission. " may correspond to the first CDM group being 0. The number of DMRS CDM groups indicated by the antenna port field being "2" may correspond to the first CDM group being {0,1}. The number of DMRS CDM groups is "3", which means that the first CDM group is {0,1,2}. It may correspond to.

[0281] One PTRS port may be associated with one DMRS port. In case of codebook or non-codebook transmission, the association between (UL) PTRS port(s) and DMRS port(s) is signaled by the first field. The first field may be a PTRS-DMRS association field. The first field may be a DCI format 0_1 ​​or DCI format 0_2. If the PUSCH corresponds to a configured grant (e.g., configured grant type 1), the PTRS port-DMRS port relationship may be the value 0, or "00" in the first field.

[0282] When PUSCH is scheduled by DCI format 0_0, the PTRS port is May be associated with port 0.

[0283] In non-codebook transmission, the number of PTRS ports (actual number) is the same as that in the first DCI format. The number of PTRS ports may be determined based on the SRI (SRS resource indicator) or the higher layer parameter sri-ResourceIndicator. For example, the number of PTRS ports (actual number) may be 8. If a source set is configured and the upper layer parameter usage is set to 'noncodebook', the PTRS port for sending corresponding to each SRS resource set is The number (actual number) may be determined based on the SRI corresponding to the associated SRS resource set, or may be determined based on the higher layer parameters srs-ResourceIndicator / srs-ResourceIndicator2 corresponding to the associated SRS resource set. The PTRS port index (PTRS port) may be set by the higher layer parameter ptrs-PortIndex. For example, If the parameter phaseTrackingRS is set, the PTRS port index is set to the higher layer parameter The PTRS port index may be set by the ptrs-PortIndex parameter, which may be a PTRS port index for each configured SRS resource.

[0284] In the case of either partial-coherent or non-coherent codebook transmission, the actual number of PTRS ports may be determined based on the TPMI and / or the number of layers, which is determined based on the DCI format. For example, in DCI format 0_1 ​​and DCI format The number of layers may be indicated by the Precoding information and number of layers (field) in the TPMI. If the higher layer parameter maxNrofPorts is set to 'n2', the number of PTRS ports (actual number) and associated transmission layers may be derived from the TPMI. For example, antenna port (PUSCH antenna port) 1000 and antenna port 1002 in the TPMI may share PTRS port 0. Antenna port 1001 and antenna port 1003 in the TPMI may share PTRS port 1. PTRS port 0 may be associated with layer x. Layer x may be transmitted on antenna port 1000 and antenna port 1002 in the TPMI. PTRS port 1 may be associated with layer y. Layer y is derived from the TPMI. The PTRS-DMRS relationship field may be used to transmit the DMRS-x and DMRS-y signals. One or both of x and y may be given by the DCI parameter PTRS-DMRS relationship (PTRS-DMRS relationship field). For example, antenna ports {1000, 1002, 1004, 1006} may be shared with PTRS port 0. Antenna ports {1001, 1003, 1005, 1007} ​​may be shared with PTRS port 1.

[0285] PTRS port 0 may be associated with layer x'. Layer x' may be transmitted on some or all of antenna ports {1000, 1002, 1004, 1006}. PTRS port 1 may be associated with layer y'. Layer y' may be transmitted on some or all of antenna ports {1001, 1003, 1005, 1007}. If the upper layer parameter maxNrofPorts is 'n2', and for partial coherence or non-coherence, layers x' and y' may be determined. Eight antennas If an antenna port is applied, layer x' and layer y' may be provided. If a DMRS extension is applied, layer x' and layer y' may be provided.

[0286] Precoding information and number of layers field The precoding information - number of layers field may be included in one or both of DCI format 0_1 ​​and DCI format 0_2. For example, the precoding information - number of layers field may determine the number of layers and the TPMI (or TPMI index). The TPMI (Transmission Precoding Matrix Indicator) may be used to determine the precoding matrix for the PUSCH. The coding matrix may be used for mapping layers to antenna ports. The precoding matrix may be used for beamforming. The number of information bits constituting the Precoding Information - Number of Layers field is determined by the number of antenna ports and the maximum number of layers. The information bits may be determined based on some or all of the number of links (layers), whether transform precoding is applied, the power mode, and the codebook subset.

[0287] The Precoding Information - Number of Layers field is one row index in one TPMI table. One TPMI table may contain a part or a part of the upper layer parameters txConfig, ul-FullPowerTransmission, codebookSubset, codebookSubset-r18, and maxRank. The row index may be determined based on the number of layers and the TPMI. For example, if the maximum number of layers for PUSCH is 5 or more, one row index For example, for PUSCH, the TPMI may be determined, and the number of layers may not be determined. If the maximum number of layers for the TPMI table is 5 or more, one TPMI table is It may be determined without being based on

[0288] The upper layer parameter maxRank may determine the maximum number of layers for the PUSCH. For example, if the upper layer parameter maxRank is set to "1", the maximum number of layers for the PUSCH may be 1. For example, if the upper layer parameter maxRank is set to "2", the maximum number of layers for the PUSCH may be 1. The maximum number of layers for the QoS may be 2. For example, if the upper layer parameter maxRank is set to "3", For example, if the upper layer parameter maxRank is set to "4", the maximum number of layers for the PUSCH may be 4. For example, if the upper layer parameter maxRank is set to "8", the maximum number of layers for the PUSCH may be 1. The number of ears may be one or both of 5 or more and 8 or less. For example, the upper layer parameter maxRank may not be set to "5", "6", and "7".

[0289] The upper layer parameter codebookSubset-r18 indicates that the PUSCH supports full coherence, partial coherence of 2, partial coherence of 4, and non-coherence. You may decide.

[0290] The Precoding Information - Number of Layers field may indicate the number of layers and the TPMI (or TPMI index). If the maximum number of layers is configured to be 5 or more, the Precoding Information - Number of Layers field may determine the TPMI and may not determine the number of layers. For example, if the maximum number of layers is set to 5 or more, The number of layers indicated by the Layer Information - Number of Layers field may be ignored.

[0291] The antenna port field may be included in one or both of DCI format 0_1 ​​and DCI format 0_2. The value of the antenna port field may determine one or both of the number of DMRS ports and CDM groups without data (DMRS-CDM groups). If transform precoding is applied, the rank (number of layers) may be 1. 4 if recoding is applied, and if the higher layer parameter dmrs-Type is 1, and if the higher layer parameter maxLength is 1, and if DMRS extensions are not applied One of the four DMRS ports is determined by the antenna port field. If transform precoding is applied, and the higher layer parameter dmrs-Type is 1, and the higher layer parameter maxLength is 1, and DMRS extension is applied. If used, one DMRS port out of eight DMRS ports may be determined by the antenna port field.

[0292] The antenna port field represents a row index in a DMRS port table. One DMRS port table may determine whether transform precoding is applied. The row index may be determined based on some or all of the higher layer parameter dmrs-Type, the higher layer parameter maxLength, whether DMRS extensions are applied, and the number of layers. For example, if the maximum number of layers for PUSCH is 5 or more, a row index is assigned to the DMRS port and the first For example, if the maximum number of layers for the PUSCH is 5 or more, one DMRS port table may be determined without being based on the second number of layers. The number of layers may be determined by the SRI field or the precoding information-layer number field.

[0293] If transform precoding is applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and DMRS extension is not applied, the DMRS port may be determined from the first DMRS port table. If transform precoding is applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and DMRS extension is not applied, the four DMRS ports may be determined from the first DMRS port table. One DMRS port of the port may be determined by the antenna port field. If transform precoding is applied, and if the higher layer parameter dmrs-Type is 1, and if the higher layer parameter maxLength is 1, and if DMRS extension is applied, one DMRS port out of eight DMRS ports may be determined by the antenna port field.

[0294] If transform precoding is applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and DMRS extension is not applied, the DMRS port may be determined from the second DMRS port table. If transform precoding is applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and DMRS extension is not applied, the DMRS port may be determined from the second DMRS port table. One DMRS port of the port may be determined by the antenna port field. If transform precoding is applied, and if the upper layer parameter dmrs-Type is 1, and if the upper layer parameter maxLength is 2, and if DMRS extension is applied, one DMRS port out of 16 DMRS ports is determined by the antenna port field. This may also be done.

[0295] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 1 If the DMRS port is determined from the third DMRS port table, and if the DMRS extension is not applied, the DMRS port may be determined from the third DMRS port table. If the transform precoding is not applied, and the higher layer parameter dmrs-Type is 1, and the higher layer parameter maxLength is 1, and the rank (number of layers) is 1, and if the DMRS extension is not applied, one of the four DMRS ports may be determined by the antenna port field. If no transformation precoding is applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 1, If so, and if DMRS extensions are applied, one DMRS port out of eight DMRS ports may be determined by the antenna port field.

[0296] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 2 If the DMRS extension is not applied, the DMRS ports may be determined from the fourth DMRS port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 1, and the higher layer parameter maxLength is 1, and the rank (number of layers) is 2, and the DMRS extension is not applied, two of the four DMRS ports may be determined by the antenna port field. If no transformation precoding is applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 2, If the DMRS port is determined from the fifth DMRS port table, and if DMRS extension is applied, the DMRS port may be determined from the fifth DMRS port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 1, and the higher layer parameter maxLength is 1, and the rank (number of layers) is 2, and if DMRS extension is applied, two of the eight DMRS ports may be determined by the antenna port field.

[0297] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 3 If DMRS extension is not applied, the DMRS port may be determined from the sixth DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 3, and the DMRS extension is not applied, the DMRS port {0, 1, 2} may be determined by the antenna port field. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 3, and the DMRS extension is not applied, the DMRS port {0, 1, 2} may be determined by the antenna port field. If transform precoding is applied, the DMRS port may be determined from the seventh DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 3, If the DMRS extension is applied, three of the eight DMRS ports may be determined by the antenna port field. If the DMRS extension is applied, the combination of the three DMRS ports determined by the antenna port field may be multiple. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 1, and the higher layer parameter maxLength is 1, and the rank (ray If the number of antennas) is 3 and DMRS extensions are applied, DMRS ports {0,1,8}, {1,8,9}, {0,8,9}, or {0,1,9} may be determined by the antenna port field.

[0298] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 4 If DMRS extension is not applied, the DMRS port may be determined from the eighth DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 4, and the DMRS extension is not applied, the DMRS port {0, 1, 2, 3} may be determined by the antenna port field. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 4, and the DMRS If extension is applied, the DMRS port may be determined from the ninth DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 4, If yes, and if DMRS extensions are applied, four of the eight DMRS ports may be determined by the antenna port field. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 1, and the higher layer parameter maxLength is 1, and the rank (number of layers) is 4, and if DMRS extensions are applied, When used, only DMRS ports {0,1,8,9} are determined by the antenna port field. This may also be done.

[0299] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 1 If so, and if DMRS extensions are not applied, select the DMRS port from the tenth DMRS port table. If transform precoding is not applied, and if the higher layer parameter dmrs-Type is 1, and if the higher layer parameter maxLength is 2, and if the rank (number of layers) is 1, and if DMRS extension is not applied, one of the eight DMRS ports may be determined by the antenna port field. If no transformation precoding is applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 1, If transform precoding is not applied, if the upper layer parameter dmrs-Type is 1, if the upper layer parameter maxLength is 2, if the rank (number of layers) is 1, and if DMRS extensions are applied, then one of the 16 DMRS ports may be determined from the eleventh DMRS port table. One of the DMRS ports may be determined by the antenna port field.

[0300] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 2 and if DMRS extension is not applied, the DMRS ports may be determined from the twelfth DMRS port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 1, and the higher layer parameter maxLength is 2, and the rank (number of layers) is 2, and if DMRS extension is not applied, two of the eight DMRS ports may be determined by the antenna port field. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 2, If the DMRS extension is applied, the DMRS port may be determined from the thirteenth DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 2, and the DMRS extension is applied, the 16 DMRS ports may be determined from the thirteenth DMRS port table. Two of the DMRS ports may be determined by the antenna port field.

[0301] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 3 If the DMRS extension is not applied, the DMRS port may be determined from the fourteenth DMRS port table. If transform precoding is not applied, the upper layer parameter dmrs-Type is 1, the upper layer parameter maxLength is 2, the rank (number of layers) is 3, and the DMRS extension is not applied, one of DMRS ports {0,1,2}, {0,1,4}, and {2,3,6} may be determined by the antenna port field. If transform precoding is not applied, the upper layer parameter dmrs-Type is 1, the upper layer parameter maxLength is 2, the rank (number of layers) is 3, and the DMRS extension is applied, the DMRS port may be determined from the fifteenth DMRS port table. If transform precoding is not applied, if the upper layer parameter dmrs-Type is 1, if the upper layer parameter maxLength is 2, if the rank (number of layers) is 3, and if DMRS extension is applied, three DMRS ports among DMRS ports {0, 1, 4, 5, 8, 9, 12, 13} are entered in the antenna port field. Therefore, it may be determined.

[0302] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 4 and if DMRS extension is not applied, the DMRS ports may be determined from the sixteenth DMRS port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 1, and the higher layer parameter maxLength is 2, and the rank (number of layers) is 4, and if DMRS extension is not applied, four of the eight DMRS ports may be determined by the antenna port field. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 4, If there is, and if DMRS extension is applied, the DMRS port may be determined from the seventeenth DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 4, and if DMRS extension is applied, the 16 DMRS ports may be determined from the seventeenth DMRS port table. Four of the DMRS ports may be determined by the antenna port field.

[0303] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 1 and if DMRS extension is not applied, the DMRS port may be determined from the eighteenth DMRS port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 2, and the higher layer parameter maxLength is 1, and the rank (number of layers) is 1, and if DMRS extension is not applied, one of the six DMRS ports may be determined by the antenna port field. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 1, If there is, and if DMRS extension is applied, the DMRS port may be determined from the nineteenth DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 1, and if DMRS extension is applied, the 12 DMRS ports may be determined from the nineteenth DMRS port table. One of the DMRS ports may be determined by the antenna port field.

[0304] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 2 and if DMRS extension is not applied, the DMRS ports may be determined from the twentieth DMRS port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 2, and the higher layer parameter maxLength is 1, and the rank (number of layers) is 2, and if DMRS extension is not applied, two of the six DMRS ports may be determined by the antenna port field. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 2, If there is, and if DMRS extension is applied, the DMRS port may be determined from the twenty-first DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 2, and if DMRS extension is applied, 12 DMRS ports may be determined from the twenty-first DMRS port table. Two of the DMRS ports may be determined by the antenna port field.

[0305] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 3 If the DMRS extension is not applied, the DMRS ports may be determined from the twenty-second DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 3, and the DMRS extension is not applied, three of the six DMRS ports may be determined by the antenna port field. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 3 If DMRS extension is applied, the DMRS port may be determined from the twenty-third DMRS port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 2, and the higher layer parameter maxLength is 1, or If the rank (number of layers) is 3 and DMRS extension is applied, 12 DMRS ports are used. The three DMRS ports of the port may be determined by the antenna port field.

[0306] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the rank (number of layers) is 4 If the DMRS extension is not applied, the DMRS port may be determined from the twenty-fourth DMRS port table. If the transform precoding is not applied, the upper layer parameter dmrs-Type is 2, the upper layer parameter maxLength is 1, the rank (number of layers) is 4, and the DMRS extension is not applied, four of the six DMRS ports (or four DMRS ports) may be determined by the antenna port field. If the transform precoding is not applied, the upper layer parameter dmrs-Type is 2, the upper layer parameter maxLength is 1, the rank (number of layers) is 4, and the DMRS extension is applied, the twenty-fifth DMRS The DMRS port may be determined from the port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 2, and the higher layer parameter maxLength is 1, and the rank (number of layers) is 4, and DMRS extension is applied, If so, four of the twelve DMRS ports (or eight DMRS ports) may be determined by the antenna port field.

[0307] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 1 If the DMRS extension is not applied, a DMRS port may be determined from the twenty-sixth DMRS port table. If the transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 1, and the DMRS extension is not applied, one of the 12 DMRS ports may be determined by the antenna port field. If the transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 1, If the DMRS extension is applied, the DMRS port may be determined from the twenty-seventh DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 1, and the DMRS extension is applied, the 24 DMRS ports may be determined from the twenty-seventh DMRS port table. One DMRS port of the packet may be determined by the antenna port field.

[0308] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 2 If the DMRS extension is not applied, the DMRS ports may be determined from the twenty-eighth DMRS port table. If the transform precoding is not applied, the upper layer parameter dmrs-Type is 2, the upper layer parameter maxLength is 2, the rank (number of layers) is 2, and the DMRS extension is not applied, two of the 12 DMRS ports may be determined by the antenna port field. If the transform precoding is not applied, the upper layer parameter dmrs-Type is 2, the upper layer parameter maxLength is 2, and the rank (number of layers) is 2 If the DMRS extension is applied, the DMRS port may be determined from the twenty-ninth DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 2, and the DMRS extension is applied, the 24 DMRS ports may be determined from the twenty-ninth DMRS port table. Two DMRS ports of the packet may be determined by the antenna port field.

[0309] If transform precoding is not applied and the higher layer parameter dmrs-Type is 2, If the upper layer parameter maxLength is 2, and the rank (number of layers) is 3, If the DMRS extension is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 3, and the DMRS extension is not applied, the DMRS port may be determined from the 30th DMRS port table. Three of the 11 DMRS ports (or DMRS ports) are in the antenna port field. If transform precoding is not applied, and if the upper layer parameter dmrs-Type is 2, and if the upper layer parameter maxLength is 2, and if the rank (number of layers) is 3, and if DMRS extension is applied, the DMRS port may be determined from the 31st DMRS port table. If not, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 3, and DMRS extension is applied. When 24 DMRS ports (or 22 DMRS ports) are used, 3 DMRS ports are It may be determined by the tenaport field.

[0310] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 4 If DMRS extension is not applied, the DMRS ports may be determined from the thirty-second DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 4, and the DMRS extension is not applied, four of the 12 DMRS ports may be determined by the antenna port field. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the rank (number of layers) is 4, If the DMRS extension is applied, the DMRS port may be determined from the thirty-third DMRS port table. If transform precoding is not applied, and the higher layer parameter dmrs-Type is 2, and the higher layer parameter maxLength is 2, and the rank (number of layers) is 4, and the DMRS extension is applied, the 24 DMRS ports may be determined from the thirty-third DMRS port table. The four DMRS ports of the packet may be determined by the antenna port field.

[0311] The terminal device 1 does not need to expect that the following are set simultaneously: no transform precoding is applied, the upper layer parameter dmrs-Type is 1, the upper layer parameter maxLength is 1, the maximum number of layers is 5 or more, and no DMRS extension is applied.

[0312] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the maximum number of layers is 5 or more. If the DMRS extension is applied, one or both of the DMRS port and the number of layers may be determined from the thirty-fourth DMRS port table. The number of layers may be determined as the number of DMRS ports. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 1, and the maximum number of layers is 5 or more, and the DMRS extension is applied, the DMRS port and / or the number of layers may be determined from the thirty-fourth DMRS port table. Five, six, seven, or eight DMRS ports may be indicated among the values ​​{0, 1, 2, 3, 8, 9, 10, 11}. If five DMRS ports are indicated, the number of layers may be five. If six DMRS ports are indicated, the number of layers may be six. If seven DMRS ports are indicated, the number of layers may be seven. If eight DMRS ports are indicated, the number of layers may be eight.

[0313] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the maximum number of layers is 5 or more. If DMRS extensions are not applied, the DMRS port number is calculated from the 35th DMRS port table. One or both of the RS ports and the number of layers may be determined. If transform precoding is not applied, if the higher layer parameter dmrs-Type is 1, if the higher layer parameter maxLength is 2, if the maximum number of layers is 5 or more, and if DMRS extension is not applied, 5, 6, 7, or 8 DMRS ports may be indicated among DMRS ports {0, 1, 2, 3, 4, 5, 6, 7}.

[0314] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the maximum number of layers is 5 or more. If the DMRS extension is applied, the DMRS port and / or the number of layers may be determined from the 36th DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 1, and the upper layer parameter maxLength is 2, and the maximum number of layers is 5 or more, and the DMRS When the extension is applied, 5, 6, 7, or 8 DMRS ports among DMRS ports {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} may be indicated, and the CDM groups of the 5, 6, 7, or 8 DMRS ports may be the same.

[0315] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the maximum number of layers is 5 or more. If , and if no DMRS extensions are applied, then , may not be expected.

[0316] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the maximum number of layers is 5 or more. If the DMRS extension is applied, the DMRS port and / or the number of layers may be determined from the 37th DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 1, and the maximum number of layers is 5 or more, and the DMRS When the extension is applied, 5, 6, 7, or 8 DMRS ports among DMRS ports {0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16, 17} may be indicated. The CDM groups may be the same.

[0317] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the maximum number of layers is 5 or more. If the DMRS port is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 is selected from the DMRS port table 38. If transform precoding is not applied, if the upper layer parameter dmrs-Type is 2, if the upper layer parameter maxLength is 2, if the maximum number of layers is 5 or more, and if the DMRS extension is not applied, then DMRS ports 5, 6, 7, or 8 of DMRS ports {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} may be selected. Alternatively, eight DMRS ports may be indicated.

[0318] If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the maximum number of layers is 5 or more. If DMRS extension is applied, one or both of the DMRS port and the number of layers may be determined from the 39th DMRS port table. If transform precoding is not applied, and the upper layer parameter dmrs-Type is 2, and the upper layer parameter maxLength is 2, and the maximum number of layers is 5 or more, and the DMRS When the extension is applied, 5, 6, 7, or 8 DMRS ports among DMRS ports {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23} may be indicated, and the CDM groups of the 5, 6, 7, or 8 DMRS ports may be the same.

[0319] The rank (or rank value) is the SRS resource indicator (SRI) field. The rank (or the value of the rank) may be determined according to the precoding information - number of layers field. For example, the maximum layer count for PUSCH may be determined according to the antenna port field. If the number is set to 5 or more, the rank is determined according to the antenna port field. The rank may be the number of layers.

[0320] Whether DMRS reception assistance is applied may be determined based on the DCI format. For example, the antenna port field included in the DCI format is used when DMRS reception assistance is applicable. For example, one of the information bits that make up the antenna port field may determine whether DMRS reception assistance is applied.

[0321] The PTRS-DMRS association field may be included in one or both of DCI format 0_1 ​​and DCI format 0_2. When the DMRS extension is not applied, the number of bits (number of information bits) constituting the PTRS-DMRS association field may be 2. When the DMRS extension is applied, the number of bits constituting the PTRS-DMRS association field may be 3.

[0322] The PTRS-DMRS relationship field may indicate the relationship between a PTRS port and a DMRS port. One or two PTRS ports may be configured by higher layer parameters (e.g., maxNrofPorts). The DMRS port may be indicated by the antenna port field. If the indication field is present and the maximum rank number is greater than 2, the PTRS-DMRS relationship field may indicate the relationship between the DMRS port and the PTRS port corresponding to one or both of the SRS resource indication field and the precoding information-layer number field.

[0323] If the SRS resource indicator field is present, and if the SRS resource indicator field is equal to "01" or "11", and if the maximum rank is 2, the most significant bit (MSB) of the PTRS-DMRS relation field may indicate the relationship between the DMRS port and the PTRS port corresponding to the SRS resource indicator field and / or the precoding information - number of layers field. In these cases, the least significant bit (LSB) of the PTRS-DMRS relation field may also indicate the relationship between the DMRS port and the PTRS port corresponding to the Second SRS resource indicator field and / or the Second Precoding information field. The maximum rank is determined by the upper layer parameter maxRank. It may be set.

[0324] The second PTRS-DMRS association field may be included in one or both of DCI format 0_1 ​​and DCI format 0_2. If no extension is applied, the number of bits (information bits) constituting the PTRS-DMRS relationship field is If the DMRS extension is applied, the number of bits constituting the PTRS-DMRS relationship field may be 3 bits. The second PTRS-DMRS relationship field may be one of the second SRS resource indication field and the second precoding information field. The DMRS port and PTRS port may indicate the relationship between the DMRS port and the PTRS port corresponding to one or both.

[0325] The second precoding information field is the DCI field. It may be included in either or both of DCI Format 0_1 ​​and DCI Format 0_2. For example, the second precoding information field may determine the TPMI (or TPMI index). One or both of the First SRS resource indicator fields may be included in DCI format 0_1 ​​and DCI format 0_2.

[0326] If the maximum number of layers is 5 or more, a second precoding information field may be included in the DCI format. Also, if the maximum number of layers is 5 or more, the precoding information-number of layers field may not be used.

[0327] DMRS for PUSCH involves sequence generation, precoding, and mapping to physical resources. The DMRS sequence r(n) may be determined based on some or all of the PDSCH sequence. For example, the DMRS sequence r(n) may be determined based at least on the pseudo-random sequence c(i).

[0328] The DMRS (DMRS sequence) r(n) for the PUSCH may be mapped to physical resources according to the DMRS configuration type. The DMRS configuration type may be DMRS configuration type 1 (Configuration Type 1) or DMRS configuration type 2 (Configuration Type 2). The DMRS sequence r(m) may be mapped to one or more resource elements. To(k,l) p,μ (or a (p,μ) (k,l) ) The DMRS sequence r(m) may be mapped to the resource Set of elements (k,l) p,μ may be mapped to one or more resource elements (k, l) p,μmay be determined based on the subcarrier index (subcarrier) k, the OFDM symbol index (OFDM symbol) l, the antenna port p, and the subcarrier spacing setting (subcarrier spacing) μ.

[0329] For example, the DMRS (DMRS sequence) for PUSCH is mapped to the virtual resource and then to the physical resource. DMRS (PDSCH-DMRS) may be mapped to a virtual resource (or intermediate quantity) a' (p’(j),μ) k,l The DMRS sequence r(n) may be mapped to the virtual resource a' based at least on the frequency domain orthogonal cover code index k'. (p’,μ) k,l If DMRS receiver assistance is not applied, k' may be {0,1}. If DMRS reception assistance is applied, k' may be {0, 1, 2, 3}. The subcarrier index k may be determined based on the frequency-domain orthogonal cover code index k' and the DMRS configuration type. j p' may be p'(j). j is p'0 to p' v-1 v may be the number of layers. A virtual resource a' of length v (p’(j),μ) k,l By Beck The precoding matrix W is at least the precoding matrix of the physical resource a (p,μ) k,l of It may be converted into a vector: a virtual resource a' of length v (p’(j),μ) k,l The vector by is multiplied by the precoding matrix W to obtain the physical resource a of length ρ. (p,μ) k,l Vector of may be converted to {p'0, ..., p' v-1} is a set of virtual antenna ports A virtual antenna port may be a DMRS antenna port. A virtual antenna port or a DMRS antenna port may be referred to as an antenna port. ρ-1} may be a set of antenna ports. A precoding matrix W may be used for precoding for the PUSCH. The precoding matrix is ​​determined by the TPMI (TPMI index) That is, the precoding matrix may be determined based on the precoding information-layer number field in the DCI format.

[0330] The number of layers v may be determined by one of the antenna port field and the precoding information - number of layers field. For example, if the maximum number of layers is 5 or more, the number of layers v may be determined by the antenna port field. For example, if the maximum number of layers is 4 or more, the number of layers v may be determined by the antenna port field. If it is below, the number of layers v may be determined by the Precoding Information - Number of Layers field.

[0331] k' may be {0, 1}. k' may be determined based on DMRS reception assistance. For example, if the information bits in the DCI format for DMRS reception assistance do not indicate a specific value, In this case, k' may be {0, 1}. If the information bits indicate a specific value, k' may be {0,1,2,3}. For example, if the upper layer parameter ExtendedDMRSports is not set, k' may be {0,1}. If the ExtendedDMRSports meter is set, k' can be {0, 1, 2, 3}. For example, If the layer parameter ExtendedDMRSports is set, and DMRS reception assistance is applied, For example, if the upper layer parameter ExtendedDMRSports is If set and DMRS reception assistance is not applied, k' may be {0,1}. Whether DMRS reception assistance is applied may be determined based on the DCI format. A portion of information bits in a specific field of the DCI format may determine whether DMRS reception assistance is applied. The specific field may be an antenna port field. k' may be referred to as a Frequency Domain-Orthogonal Cover Code Index (FD-OCC index). When k' is {0,1}, it may mean that the FD-OCC length is 2. When k' is {0,1,2,3}, The length of the FD-OCC may be 4.

[0332] If k' is {0,1} in DMRS configuration type 1, then k' may be {0,1} in DMRS configuration type 2. If k' is {0,1,2,3} in DMRS configuration type 1, then k' may be {0,1,2,3} in DMRS configuration type 2.

[0333] As a problem, in order to increase the number of simultaneous connections of terminal devices and improve throughput, it is necessary to expand the number of DMRS ports and the number of layers. Means 1 and 2 may be used to expand the number of DMRS ports and the number of layers.

[0334] FIG. 9 is a diagram illustrating an example of mapping of DMRSs to antenna ports for PUSCH according to one aspect of this embodiment. A first DMRS (DMRS sequence) may be mapped to resource elements corresponding to OFDM symbol 910 and DMRS antenna port #900 (AP #900). A second DMRS may be mapped to resource elements corresponding to OFDM symbol 910 and DMRS antenna port #900 (AP #900). 911 and DMRS antenna port #901 (AP #901) are mapped to the resource elements corresponding to The third DMRS is OFDM912 and the resource corresponding to DMRS antenna port #902 (AP #902). In FIG. 9, one block may be a resource element. In FIG. 9, a block marked with "+" or "-" indicates that a DMRS is In FIG. 9, the white blocks are not mapped even if the DMRS is not placed. good.

[0335] The first DMRS may be mapped to a first physical resource. The second DMRS may be mapped to a second physical resource. The third DMRS may be mapped to a third physical resource. The first physical resource is based on at least OFDM symbol 910 and antenna port #900. The second physical resource may be at least OFDM symbol 911 and antenna port #901. The third physical resource may be based on at least OFDM symbol 912 and antenna port #902.

[0336] In Fig. 9, DMRS enhancement may be applied, and in Fig. 9, DMRS reception assistance may or may not be applied.

[0337] In Figure 9, "+" indicates w f (k') may be +1. In FIG. Ha, w f (k') may be -1. The DMRS in FIG. 9 is in DMRS configuration type 1. For example, the first DMRS corresponding to DMRS antenna port #900 may be a single-symbol forward DMRS. f (k') is { w f (0)=+1, w f (1)=-1, w f (2)=-1, w f(3)=+1} for the second DMRS corresponding to DMRS antenna port #901. f (k') is { w f (0)=+1, w f (1)=-1, w f (2)=+1, w f (3)=-1} for the third DMRS corresponding to DMRS antenna port #902. f (k') is { w f (0)=+1, w f (1)=-1}, or {w f (0)=+1, w f (1)=-1, w f (2)=+1, w f (3)=-1}.

[0338] For example, DMRS antenna port #901 may be DMRS antenna port #902. DMRS antenna port #901 may be the same as DMRS antenna port #902. OFDM symbol 911 may be the same as OFDM symbol 912. When DMRS reception assistance is applied, the second DMRS is f (k') where DMRS reception assistance is applied. If not, the third DMRS is the second w f (k') may be mapped based on the second w f (k') may be {+1, -1, +1, -1}. When DMRS reception assistance is applied, k' may be {0, 1, 2, 3}, and the second DMRS is the second w f If DMRS reception assistance is not applied, k' may be {0, 1}, and the third DMRS may be mapped based on the second w f It may be mapped based on (k').

[0339] In FIG. 9, the CDM group corresponding to DMRS antenna port #900 may be the same as the CDM group corresponding to DMRS antenna port #901. The first DMRS and the second DMRS may be simultaneously The CDM group corresponding to DMRS antenna port #900 may be the same as the CDM group corresponding to DMRS antenna port #902. Both DMRS antenna port #900 and DMRS antenna port #902 may not be used. For example, both antenna port #900 and antenna port #902 may not be used. For example, in PUSCH transmission, , both DMRS antenna port #900 and DMRS antenna port #902 do not have to be used.

[0340] OFDM symbol 910, OFDM symbol 911, and OFDM symbol 912 are the same OFDM symbol. The terminal device 1 may transmit the first PUSCH with the first DMRS and the second PUSCH with the second DMRS in the same resource element.

[0341] If DMRS extensions are not applied, antenna port #900 may not be used and antenna port #902 may be used.

[0342] DMRS (DMRS sequence, DMRS sequence) r(·) for PUSCH is one or more resource elements a (p,μ) k,l The DMRS (DMRS sequence) r(·) for the PUSCH may be mapped to one or more virtual resources a′ (p’(j),μ) k,l Virtual resources may be mapped to Based on the recoding matrix W, one or more resource elements a (p,μ) k,l One or more resource elements may be referred to as a physical resource. .

[0343] When a DMRS is mapped to a physical resource (or a virtual resource), w f (k') is used That is, the DMRS may include a first frequency-domain orthogonal cover code index k′, or or a physical address based at least on a second frequency domain orthogonal cover code index k'. The first frequency-domain orthogonal cover code index k' may be 0 and 1. The second frequency-domain orthogonal cover code index k' may be 1 and 2. The code index k' may be 0, 1, 2, and 3.

[0344] If DMRS reception assistance is not applied, the physical resource (or virtual resource) may be determined based on the first index k'. The resource (or virtual resource) may be determined based on the second index k'.

[0345] When DMRS reception assistance is applied, the number of PRBs for DMRS is assumed to be even. When DMRS reception assistance is applied, the length K of the DMRS mapping in the frequency domain may be 4. When DMRS reception assistance is not applied, the length K of the DMRS mapping in the frequency domain may be 2. For example, the length K of the DMRS mapping in the frequency domain may be the length of the frequency domain orthogonal cover code. If the index to be used is k'', the frequency domain orthogonal cover code index k' may be mod(k'', K). Whether DMRS extension is applied depends on the higher layer parameters. Whether DMRS reception assistance is applied may be determined based on the DCI format. The DCI format may be determined based on whether DMRS reception assistance is applied. It may be shown.

[0346] A first field in the DCI format may determine the antenna port (DMRS antenna port). A second field in the DCI format may determine whether DMRS reception assistance is applied. The first field may be the same as the second field. That is, one field in the DCI format may indicate one or both of the antenna port (DMRS port) and whether DMRS reception assistance is applied. For example, if a DMRS extension is applied, one field in the DCI format may indicate both the antenna port (DMRS port) and whether DMRS reception assistance is applied. For example, if a DMRS extension is not applied, one field in the DCI format may not indicate whether DMRS reception assistance is applied.

[0347] The maximum number of DMRS ports when the DMRS extension is applied may be greater than the maximum number of DMRS ports when the DMRS extension is not applied. For example, when the DMRS extension is applied, the maximum number of DMRS ports may be a first value. When the DMRS extension is not applied, the maximum number of DMRS ports may be a second value.

[0348] FIG. 10 is a diagram showing a method for determining the number of layers for a PUSCH according to one aspect of the present embodiment. A DMRS 1010 may be a DMRS for the PUSCH 1000. A DMRS 1011 may be a DMRS for the PUSCH 1001. The maximum number of layers (maxRank) for the PUSCH 1000 may be 4. The maximum number of layers for the PUSCH 1001 may be 8.

[0349] The number of layers 1021 for the PUSCH 1000 may be indicated by the precoding information—number of layers field in the DCI format 1040 .

[0350] The precoding information - number of layers field in the DCI format 1040 scheduling the PUSCH 1000 may determine the row index in the first TPMI table. The first TPMI table is based on at least the maximum number of layers (upper layer parameter maxRank). Based on the precoding information - number of layers field in the DCI format 1040 that schedules the PUSCH 1000, the transmit precoder (precoder, precoding matrix W) for the PUSCH 1000 may be determined by the codebook (uplink codebook) Based on the precoding information - number of layers field in the DCI format 1040 that schedules the PUSCH 1000, a transmit precoder (precoder, precoding matrix W) for the PUSCH 1000 may be determined.

[0351] The number of TPMIs in the first TPMI table may depend on the number of layers 1021. The number of TPMIs may be the number of TPMIs (TPMI indexes) that can be indicated by the precoding information-number of layers field. When the number of TPMIs corresponding to the number of layers 1021 is N, the TPMI may be any value from 0 to N-1.

[0352] The number of layers 1021 of the PUSCH 1000 may be one, two, three, or four.

[0353] The DMRS port for the DMRS1010 (and / or PUSCH1000) is in DCI format 1040. The first DMRS port table for the antenna port field that determines the DMRS 1010 may be determined based at least on the layer number 1021. For example, the first DMRS port table for the antenna port field that determines the DMRS 1010 may be determined based at least on the layer number 1021.

[0354] The number of layers 1020 for the PUSCH 1001 may be indicated by an antenna port field in the DCI format 1040. It may be determined as the number of DMRS ports indicated by the antenna ports field in 1040.

[0355] The precoding information - number of layers field in the DCI format 1040 scheduling the PUSCH 1001 may determine the row index in the second TPMI table. The second TPMI table is based at least on the maximum number of layers (upper layer parameter maxRank). The precoding information - number of layers field in the DCI format 1040 for scheduling the PUSCH 1001 and the DCI for scheduling the PUSCH 1001 may be determined by the For PUSCH1001 based on the antenna port field in format 1040 The transmit precoder (precoder, precoding matrix W) is The transmit precoder (precoder, precoding matrix W) for the PUSCH 1001 may be determined based on the precoding information - number of layers field in the DCI format 1040 for scheduling the PUSCH 1001 and the antenna port field in the DCI format 1040 for scheduling the PUSCH 1001. good.

[0356] The number of TPMIs in the second TPMI table may not depend on the number of layers 1020. Regardless of the number of layers 1020, the number of TPMIs in the second TPMI table may be N.

[0357] The number of layers 1020 of the PUSCH 1001 may be any of 5, 6, 7, and 8.

[0358] The DMRS port for the DMRS1011 (and / or PUSCH1001) is in DCI format 1040. For example, the second DMRS port table for the antenna port field that determines the DMRS 1011 may be determined without being based on the number of layers indicated by the precoding information - number of layers field. For example, the second DMRS port table for the antenna port field that determines the DMRS 1011 may be determined based on the upper layer parameter maxRank. The second DMRS port table for the antenna port field is set to 8. The maximum rank may be determined based on the upper layer parameter maxRank.

[0359] The number of layers 1022 for the PUSCH 1001 may be indicated by the precoding information—number of layers field in the DCI format 1040.

[0360] The precoding information - number of layers field in the DCI format 1040 scheduling the PUSCH 1001 may determine the row index in the third TPMI table. The third TPMI table is based at least on the maximum number of layers (upper layer parameter maxRank). Based on the precoding information - number of layers field in the DCI format 1040 that schedules the PUSCH 1001, the transmit precoder (precoder, precoding matrix W) for the PUSCH 1001 may be determined by the codebook (uplink codebook) The transmit precoder (precoder, precoding matrix W) for the PUSCH 1000 may be determined based on the precoding information - number of layers field in the DCI format 1040 that schedules the PUSCH 1001. Third TPMI Table may not include layer numbers 1, 2, 3, and 4.

[0361] The number of TPMIs in the third TPMI table may depend on the number of layers 1022. If the number of TPMIs corresponding to the number of layers 1022 is N, the TPMI may be any value from 0 to N-1.

[0362] The number of layers 1022 of the PUSCH 1001 may be any of 5, 6, 7, and 8.

[0363] The DMRS port for the DMRS1011 (and / or PUSCH1001) is in DCI format 1040. The third DMRS port table for the antenna port field determining the DMRS 1011 may be determined based at least on the layer number 1022. For example, the third DMRS port table for the antenna port field determining the DMRS 1011 may be determined based at least on the layer number 1022.

[0364] The terminal device 1 may include a receiving unit that receives the PDCCH. The DCI (DCI format) may be mapped (mapped) to the PDCCH. The PDCCH may accompany the DCI. The PDCCH may carry the DCI. may be transmitted for

[0365] The terminal device 1 may include a transmission unit that transmits a PUSCH. The DCI may schedule the PUSCH (or PUSCH transmission). For example, the DCI may instruct transmission of a PUSCH.

[0366] The DMRS for the PUSCH may be mapped to one or more physical resources. The DMRS for the PUSCH may be mapped to one or more virtual resources and then to one or more physical resources. The physical resources and virtual resources may be configured by resource elements. That is, the DMRS for the PUSCH may be mapped to one or more resource elements.

[0367] In the first means, the maximum number of layers for the PUSCH may be set to be 5 or more. In the first means, the maximum number of layers for the PUSCH may be set to be 5 or more. The maximum number of layers is 5 or more. The maximum number of layers may be 5 or more, which may mean that the upper layer parameter maxRank is set to 8. The maximum number of layers being equal to or greater than five may mean that the number of codewords is two.

[0368] In the first means, the DMRS port may be determined by an antenna port field in the DCI. The DMRS port may be selected from a DMRS port table based on the antenna port field. The DMRS port table may be determined based on the maximum number of layers (the upper layer parameter maxRank or the number of codewords). In the first means, the DMRS port table is not determined based on the number of layers indicated by the precoding information - number of layers field. For example, the DMRS port table may be configured to handle at least one of the following cases: The antenna port field may be determined based on, or not based on, the number of layers indicated by the precoding information - number of layers field. The antenna port field may select 5, 6, 7, or 8 DMRS ports. The terminal device 1 may ignore the number of layers indicated by the precoding information - number of layers field. The terminal device 1 may expect the number of layers indicated by the precoding information - number of layers field to be the same as the number of layers indicated by the antenna port field.

[0369] In the first means, the number of layers for the PUSCH may be determined by the antenna port field. The number of layers may be determined as the number of DMRS ports. may not be determined by the precoding information - number of layers field. The number of layers for the PUSCH may be 5, 6, 7, or 8.

[0370] In means 1, the precoding matrix for the PUSCH is the antenna port field and The one TPMI may be determined based at least on the one TPMI of the PUSCH. The one TPMI may be determined by the precoding information - number of layers field in the DCI. The one TPMI may be determined based on the one TPMI of the PUSCH. One TPMI may be determined based on the precoding information - number of layers field in the DCI, independent of the number of layers for the PUSCH. One TPMI may be determined based on the precoding information - number of layers field, independent of the number of layers for the PUSCH. One TPMI may be indicated from N TPMIs based on the precoding information - number of layers field in the DCI. N may be determined based on the number of layers for the PUSCH. In the first means, one TPMI may not be determined based on the number of layers for the PUSCH. N may be determined based on the number of selectable precoding layers. N may be the maximum number of mapping matrices. N may be the maximum number of TPMIs that can be specified. N may be the maximum number (maximum value) of TPMIs. N may be the same as the size of the Precoding Information - Number of Layers field. That is, N may be the same as the maximum value of the index mapped from the bit field in the Precoding Information - Number of Layers field.

[0371] The fact that parameter A does not depend on parameter B may be expressed in other words as parameter A and parameter B being individually defined, set independently, or set individually. Additionally or alternatively, "parameter A does not depend on parameter B" means that parameter A's This includes being able to define and set the value so that it is not limited by the value of parameter B. "Parameter A does not depend on parameter B" may mean that the value of parameter A can be defined or set so that the value range, etc., is not limited or changed depending on the value of parameter B.

[0372] In the means 1, the terminal device 1 expects that the number of layers for the PUSCH will exceed the maximum number of layers. You don't have to.

[0373] In the second means, the maximum number of layers for the PUSCH may be set to be 5 or more. In the second means, the maximum number of layers for the PUSCH may be set to be 5 or more. The maximum number of layers is 5 or more. This means that the upper layer parameter maxRank can be set to 5, 6, 7, or 8. If the maximum number of layers is 5 or more, 5, 6, 7, or 8 may be set. The upper layer parameter maxRank may be set. The maximum number of layers may be 5 or more, and the number of codewords may be 2.

[0374] In the second means, the DMRS port may be determined by the antenna port field and the precoding information-layer number field in the DCI. The DMRS port table may be selected based on the precoding information - number of layers field. The DMRS port table does not have to be determined based on the precoding information - number of layers field. In the second means, the DMRS port table may be determined based on the number of layers indicated by the precoding information-layer number field. N may be the number of layers indicated by the precoding information - number of layers field. The terminal device 1 may expect that the number of layers indicated by the precoding information - number of layers field is the same as the number of DMRS ports indicated by the antenna port field.

[0375] In the second means, the number of layers for the PUSCH may not be determined by the antenna port field. The number of layers for the PUSCH may be determined by the precoding information-layer number field. The number of layers for the PUSCH may be 5, 6, 7, or 8. For example, if the upper layer parameter maxRank is set to 8, the number of layers for PUSCH is For example, if the upper layer parameter maxRank is set to 7, the number of layers for the PUSCH may be 5, 6, or 7. For example, if the upper layer parameter maxRank is set to 6, the number of layers for the PUSCH may be 5 or 6. For example, if the upper layer parameter maxRank is set to 5, The number of layers for the PUSCH may be 5. In the means 2, it may not be expected that the number of layers for the PUSCH is any one of 1, 2, 3, and 4.

[0376] In the second method, a precoding matrix for a PUSCH is determined based on at least one TPMI. One TPMI may be determined by the precoding information - number of layers field in the DCI. One TPMI may be determined by the precoding information layer in the DCI. The number of TPMIs may be indicated from N based on the number field, where N is the number of layers for the PUSCH. In the means 2, one TPMI may be determined based on the number of layers for the PUSCH. The one TPMI may be determined based on the upper layer parameter maxRank. The one TPMI may be determined from the one TPMI table. In the means 2, the one TPMI table is determined based on at least the upper layer parameter maxRank. That's fine.

[0377] In the first and second means, DMRS extension may be applied. If applicable, all of the multiple DMRS ports for the PUSCH may correspond to the same CDM group. For example, if the DMRS extension for the PUSCH is applied and the upper layer parameter maxRank is set to 8, all of the multiple DMRS ports for the PUSCH may correspond to the same CDM group. If DMRS extensions are not applied for the PUSCH, then all of the multiple DMRS ports for the PUSCH may not correspond to the same CDM group. a first portion of the DMRS ports corresponding to a first CDM group and a second portion of the DMRS ports corresponding to a second CDM group; may correspond to a second CDM group.

[0378] Various aspects of the device according to one aspect of this embodiment will be described below.

[0379] (1) In order to achieve the above object, the aspects of the present invention provide the following means: That is, a first aspect of the present invention is a terminal device, comprising: a receiving unit that receives a PDCCH to which a DCI is mapped; and a transmitting unit that transmits a PUSCH scheduled by the DCI, wherein a DMRS for the PUSCH is mapped to one or more resource elements, and the PUSCH The maximum number of layers is set to 5 or more, and a plurality of DMRS ports for the DMRS are set. the number of layers for the PUSCH is determined by the antenna port field in the DCI, the number of layers for the PUSCH is determined by the antenna port field, the number of layers is one of 5, 6, 7, and 8, and the precoding matrix for the PUSCH is determined by the antenna port field in the DCI. The DCI is determined based at least on a tenaport field and one TPMI, and a precoding information-layer number field in the DCI indicates the one TPMI from N TPMIs. , N is not determined based on the number of layers. Also, setting the maximum number of layers to 5 or more means setting the upper layer parameter maxRank to 8.

[0380] (2) A second aspect of the present invention is a base station apparatus, comprising: a transmitter that transmits a PDCCH to which a DCI is mapped; and a receiver that receives a PUSCH scheduled by the DCI, wherein a DMRS for the PUSCH is mapped to one or more resource elements; a maximum number of layers is set for the PUSCH to be 5 or more; a plurality of DMRS ports for the DMRS are determined by an antenna port field in the DCI; the number of layers for the PUSCH is determined by the antenna port field, and the number of layers is one of 5, 6, 7, and 8; and a precoding matrix for the PUSCH is determined by the antenna port field. The DCI is determined based at least on a tenaport field and one TPMI, and a precoding information-layer number field in the DCI indicates the one TPMI from N TPMIs. , N is not determined based on the number of layers. Also, setting the maximum number of layers to 5 or more means setting the upper layer parameter maxRank to 8.

[0381] (3) A third aspect of the present invention is a terminal device, comprising: a receiving unit that receives a PDCCH to which a DCI is mapped; and a transmitting unit that transmits a PUSCH scheduled by the DCI, wherein a DMRS for the PUSCH is mapped to one or more resource elements, and the PUSCH a number of DMRS ports for the DMRS is determined by an antenna port field in the DCI and a precoding information - number of layers field in the DCI; a number of layers for the PUSCH is determined by the precoding information - number of layers field; The number of layers is not expected to be 1, 2, 3, or 4. When the upper layer parameters are configured, the plurality of DMRS ports are assigned to a first CDM group. In response, if the first higher layer parameter is not configured, a first portion of the plurality of DMRS ports corresponds to the first CDM group, and a second portion of the plurality of DMRS ports corresponds to the first CDM group. , which corresponds to the second CDM group.

[0382] (4) A fourth aspect of the present invention is a base station apparatus, comprising: a transmitter that transmits a PDCCH to which a DCI is mapped; and a receiver that receives a PUSCH scheduled by the DCI, wherein a DMRS for the PUSCH is mapped to one or more resource elements; a maximum number of layers for the PUSCH is set to be any one of 5, 6, 7, and 8; and a plurality of DMRS ports for the DMRS are determined by an antenna port field in the DCI and a receiver that receives a PUSCH scheduled by the DCI. and a precoding information - number of layers field in the PUSCH, and the number of layers for the PUSCH is determined by the precoding information - number of layers field; The number of layers is not expected to be any of 1, 2, 3, and 4. Also, when a first upper layer parameter is configured, the plurality of DMRS ports are assigned to a first CDM group. Correspondingly, if the first higher layer parameter is not configured, a first portion of the plurality of DMRS ports corresponds to the first CDM group, and a second portion of the plurality of DMRS ports corresponds to the first CDM group. corresponds to the second CDM group.

[0383] The programs that run on the base station device 3 and terminal device 1 according to the present invention may be programs that control a CPU (Central Processing Unit) or the like (programs that make a computer function) so as to realize the functions of the above-described embodiments according to the present invention. Information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing. The data is then stored in various ROMs such as Flash ROM (Read Only Memory) or HDD (Hard Disk Drive), and is read, modified, and written by the CPU as needed.

[0384] Note that the terminal device 1 and part of the base station device 3 in the above-described embodiment may be realized by a computer. In this case, a program for realizing this control function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed to realize the function.

[0385] The term "computer system" used here refers to a computer system built into the terminal device 1 or base station device 3, and includes hardware such as an OS and peripheral devices. Also, the term "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into the computer system.

[0386] Furthermore, the term "computer-readable recording medium" may include a medium that dynamically stores a program for a short period of time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, or a medium that stores a program for a fixed period of time, such as volatile memory within a computer system that serves as a server or client in such a case. The program may also be one that realizes part of the above-mentioned functions, or one that can realize the above-mentioned functions in combination with a program already stored in the computer system.

[0387] Furthermore, the base station device 3 in the above-described embodiment can also be realized as a collection (device group) consisting of multiple devices. Each of the devices constituting the device group may have some or all of the functions or functional blocks of the base station device 3 according to the above-described embodiment. It is sufficient for the device group to have all of the functions or functional blocks of the base station device 3. Furthermore, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as a collection.

[0388] Furthermore, the base station device 3 in the above-described embodiment may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or an NG-RAN (NextGen RAN, NR RAN). Furthermore, the base station device 3 in the above-described embodiment may be an eNodeB and / or a gNB. It may have some or all of the functions of its higher-level node.

[0389] Furthermore, some or all of the terminal device 1 and base station device 3 in the above-described embodiments may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually integrated into a chip, or part or all of them may be integrated into a chip. The integrated circuit method is not limited to LSI, but may be a dedicated circuit, Alternatively, it may be realized by a general-purpose processor. In addition, with the advancement of semiconductor technology, it is expected that LSI will replace the general-purpose processor. When integrated circuit technology emerges, it is also possible to use integrated circuits based on that technology.

[0390] Furthermore, in the above-described embodiment, a terminal device is described as an example of a communication device, but the present invention is not limited to this and can also be applied to terminal devices or communication devices such as stationary or non-movable electronic devices installed indoors or outdoors, for example, AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.

[0391] Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment and includes design modifications within the scope of the invention. Furthermore, the present invention is susceptible to various modifications within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, configurations in which elements described in the above embodiments are substituted with elements that achieve the same effect are also included. [Explanation of symbols]

[0392] 1(1A, 1B, 1C) Terminal equipment 3 Base station equipment 10, 30 Radio transmitter / receiver 10a, 30a Radio transmitter 10b, 30b Wireless receiver 11, 31 Antenna section 12, 32 RF section 13, 33 Baseband section 14, 34 Upper layer processing unit 15, 35 Medium access control layer processing unit 16, 36 Radio resource control layer processing unit 91, 92, 93, 94 Search area set 300 Component Carriers 301 Primary Cell 302, 303 Secondary Cell 700 Set of resource elements for PSS 710, 711, 712, 713 Set of resource elements for PBCH and DMRS for PBCH 720 Set of Resource Elements for SSS 3000 points 3001, 3002 Resource Grid 3003, 3004 BWP 3011, 3012, 3013, 3014 offset 3100, 3200 common resource block set 900, 901, 902 DMRS antenna ports 910, 911, 912 OFDM symbols 1000, 1001 PUSCH 1010, 1011 DMRS 1020, 1021, 1022 Number of layers (ranks) 1030 PUSCH Settings 1040 DCI format

Claims

1. a receiving unit for receiving a PDCCH to which DCI is mapped; a transmitter unit for transmitting a PUSCH scheduled by the DCI, the DMRS for the PUSCH is mapped to one or more resource elements; The maximum number of layers for the PUSCH is set to 5 or more, The plurality of DMRS ports for the DMRS are indicated in the antenna port field in the DCI. It is therefore determined the number of layers for the PUSCH is determined by the antenna port field; the number of layers is 5, 6, 7, or 8; a precoding matrix for the PUSCH is determined based at least on the antenna port field and one TPMI; A precoding information-layer number field in the DCI indicates the one TPMI from N TPMIs; The number N does not depend on the number of layers. Terminal device.

2. The maximum number of layers is set to 5 or more, and the upper layer parameter maxRank is set to 8. The terminal device according to claim 1 .

3. a receiving unit for receiving a PDCCH to which DCI is mapped; a transmitter unit for transmitting a PUSCH scheduled by the DCI, the DMRS for the PUSCH is mapped to one or more resource elements; The maximum number of layers for the PUSCH is set to be one of 5, 6, 7, and 8. R, The multiple DMRS ports for the DMRS are indicated by an antenna port field in the DCI and , and a precoding information-layer number field in the DCI; the number of layers for the PUSCH is determined by the precoding information - number of layers field; The number of layers is not expected to be 1, 2, 3, or 4. Terminal device.

4. When a first upper layer parameter is configured, the plurality of DMRS ports are configured to form a first CDM group. It corresponds to the group, If the first higher layer parameter is not configured, a first portion of the plurality of DMRS ports corresponds to the first CDM group, and a second portion of the plurality of DMRS ports corresponds to the second CDM group. Corresponding to the two CDM groups The terminal device according to claim 3 .

5. a transmitter for transmitting a PDCCH to which DCI is mapped; a receiving unit for receiving a PUSCH scheduled by the DCI, the DMRS for the PUSCH is mapped to one or more resource elements; The maximum number of layers for the PUSCH is set to 5 or more, The plurality of DMRS ports for the DMRS are indicated in the antenna port field in the DCI. It is therefore determined the number of layers for the PUSCH is determined by the antenna port field; the number of layers is 5, 6, 7, or 8; a precoding matrix for the PUSCH is determined based at least on the antenna port field and one TPMI; A precoding information-layer number field in the DCI indicates the one TPMI from N TPMIs; The number N is not determined based on the number of layers. Base station equipment.

6. The maximum number of layers is set to 5 or more, and the upper layer parameter maxRank is set to 8. The base station device according to claim 5 .

Images