Terminal device, base station device, and communication method

Abstract

The present invention is provided with: a reception unit for receiving a PDCCH in which a DCI format for instructing the transmission of a PUSCH is mapped; a transmission unit that transmits the PUSCH; and the transmission unit that generates a DMRS for the PUSCH and a PTRS for the PUSCH, a first upper-layer parameter relating to a maximum number of DMRS ports for the DMRS, a first field in the DCI format comprising a first bit number when the first upper-layer parameter is not set, and a second field in the DCI format comprising a second bit number when the first upper-layer parameter is set. The first field in the DCI format is composed of a second number of bits, and a PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

Description

Technical Field

[0001] The present invention relates to a terminal device, a base station device and a communication method. This application claims priority to Japanese Patent Application No. 2022-97704 filed in Japan on June 17, 2022, the contents of which are incorporated herein by reference. Background Art

[0002] In the Third Generation Partnership Project (3GPP: rd In the LTE (Global Network Operations Framework) project (a registered trademark), wireless access methods and wireless networks (hereinafter also referred to as "Long Term Evolution (LTE)" or "Evolved Universal Terrestrial Radio Access (EUTRA)") for cellular mobile communications were studied. In LTE, the base station device is also called eNodeB (evolved NodeB), and the terminal device is also called UE (User Equipment). LTE is a cellular communication system that covers an area with multiple base station devices configured in a cell shape. A single base station device can manage multiple service cells.

[0003] In 3GPP, the next generation standard (NR: New Radio) was studied in order to make recommendations to IMT (International Mobile Telecommunication)-2020, which is the next generation mobile communication system standard established by the International Telecommunication Union (ITU) (Non-Patent Document 1). NR is required to meet the requirements of the following three scenarios in a single technical framework: eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication).

[0004] In 3GPP, research is being conducted on the extension of services supported by NR (Non-Patent Document 2). Prior art literature 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 that the invention aims to solve

[0006] One aspect of the present invention provides a terminal device that efficiently communicates, a communication method used for the terminal device, a base station device that efficiently communicates, and a communication method used for the base station device. Technical Solution

[0007] (1) A first scheme of the present invention is a terminal device, comprising: a receiving unit, receiving a PDCCH in a DCI format that maps a PUSCH; a transmitting unit, transmitting the PUSCH; and the transmitting unit, generating a DMRS for the PUSCH and a PTRS for the PUSCH, wherein a first upper layer parameter is related to a maximum number of DMRS ports for the DMRS, and when the first upper layer parameter is not set, a first field in the DCI format is composed of a first number of bits, and when the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, and a PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

[0008] (2) In addition, a second scheme of the present invention is a base station device, comprising: a transmitting unit, which transmits a PDCCH in a DCI format that maps a PUSCH; and a receiving unit, which receives the PUSCH, wherein the base station device generates a DMRS for the PUSCH and a PTRS for the PUSCH, wherein a first upper layer parameter is related to a maximum number of DMRS ports for the DMRS, wherein when the first upper layer parameter is not set, a first field in the DCI format is composed of a first number of bits, and when the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, and a PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

[0009] (3) In addition, the third scheme of the present invention is a communication method for a terminal device, the communication method comprising the following steps: receiving a PDCCH in a DCI format that maps an indication of the transmission of a PUSCH; transmitting the PUSCH; and generating a DMRS for the PUSCH and a PTRS for the PUSCH, wherein a first upper layer parameter is related to a maximum number of DMRS ports for the DMRS, and when the first upper layer parameter is not set, a first field in the DCI format is composed of a first number of bits, and when the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, and a PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

[0010] (4) In addition, a fourth scheme of the present invention is a communication method for a base station device, the communication method comprising the following steps: sending a PDCCH in a DCI format that maps a PUSCH to be sent; and receiving the PUSCH, in which a DMRS for the PUSCH and a PTRS for the PUSCH are generated, a first upper layer parameter is related to a maximum number of DMRS ports for the DMRS, when the first upper layer parameter is not set, a first field in the DCI format is composed of a first number of bits, and when the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, and a PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS. Beneficial Effects

[0011] According to one aspect of the present invention, a terminal device can efficiently communicate. In addition, a base station device can efficiently communicate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1This is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment. Figure 2 is a subcarrier spacing setting μ, the number of OFDM symbols per time slot N, and slot symb And an example of the relationship between CP (cyclic prefix) settings. Figure 3 This is a diagram showing an example of a resource grid configuration method according to one aspect of the present embodiment. Figure 4 This is a diagram showing a configuration example of a resource grid 3001 according to one aspect of the present embodiment. Figure 5 It is a schematic block diagram showing a configuration example of the base station device 3 according to one aspect of the present embodiment. Figure 6 It is a schematic block diagram showing a configuration example of the terminal device 1 according to one aspect of the present embodiment. Figure 7 This is a diagram showing an example configuration of an SS / PBCH block according to one scenario of the present embodiment. Figure 8 This is a diagram showing an example of monitoring opportunities of a search area set according to one scenario of the present embodiment. Fig. 9 This is a diagram showing an example of antenna port mapping to DMRS in one scheme of the present embodiment. DETAILED DESCRIPTION

[0013] Hereinafter, embodiments of the present invention will be described.

[0014] floor(C) may be a floor function for a real number C. For example, floor(C) may be a function that outputs the largest integer within a range not exceeding the real number C. ceil(D) may be a ceiling function for a real number D. For example, ceil(D) may be a function that outputs the smallest integer within a range not less than D. mod(E,F) may be a function that outputs the remainder obtained by dividing E by F. mod(E,F) may also be a function that outputs a value corresponding to the remainder obtained by dividing E by F. exp(G) = e^G. Here, e is the Napier number. H^I represents H raised to the power of I. max(J,K) is a function that outputs the maximum value between J and K. When 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 between L and M. When 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.

[0015] In a wireless communication system of one scheme of the present embodiment, at least OFDM (Orthogonal Frequency Division Multiplex) is used. OFDM symbol is the unit of time domain of OFDM. OFDM symbol includes at least one or more subcarriers. 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 Multiplex) is used. In the uplink, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex) is used. DFT-s-OFDM can be given by applying transform precoding to CP-OFDM.

[0016] The OFDM symbol may be a name including the CP added to the OFDM symbol. That is, a certain OFDM symbol may be constructed to include the certain OFDM symbol and the CP added to the certain OFDM symbol.

[0017] Figure 1 FIG. 1 is a conceptual diagram of a wireless communication system according to one embodiment of the present invention. Figure 1 In the wireless communication system, 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 are also referred to as terminal device 1 (UE#1: User Equipment #1).

[0018] The base station device 3 may be configured to include one or more transmission devices (or transmission points, transceiver devices, or transceiver points). When the base station device 3 is configured to include multiple transmission devices, the multiple transmission devices may be respectively arranged at different positions.

[0019] The base station device 3 may provide one or more serving cells. A serving cell may be defined as a collection of resources used for wireless communication. In addition, a serving cell is also referred to as a cell.

[0020] The serving cell may be configured to include one or both of a downlink component carrier (downlink carrier) and an uplink component carrier (uplink carrier). The serving cell may also 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 collectively referred to as component carriers (carriers).

[0021] For example, one resource grid may be provided for each component carrier. In addition, one resource grid may be provided for each set of a component carrier and a subcarrier spacing configuration μ. Here, the subcarrier spacing configuration μ is also referred to as a numerology. For example, one resource grid may be provided for a set of an antenna port p, a subcarrier spacing configuration μ, and a transmission direction x.

[0022] The subcarrier spacing (subcarrier spacing setting) μ may be any one of 0, 1, 3, and 4 for the synchronization channel. The subcarrier spacing setting (subcarrier spacing setting) μ may be 0, 1, 2, and 3 for the data channel. The synchronization channel may be a general term for PSS, SSS, and PBCH. The data channel may be a general term for at least PDSCH, PUSCH, PDCCH, and PUCCH.

[0023] The resource grid includes N size,μ grid,x N RB sc subcarriers. The resource grid is composed of a common resource block N start,μ grid,x In addition, the public resource block N start,μ grid,x Also called the reference point of the resource grid.

[0024] The resource grid includes N subframe,μ symb OFDM symbols.

[0025] The subscript x added to the parameter associated with the resource grid indicates the transmission direction. For example, the subscript x may be used to indicate either a downlink or an uplink.

[0026] N size,μ grid,x The offset setting is indicated by the parameter provided by the RRC layer (for example, the parameter CarrierBandwidth). start,μ grid,xThe bandwidth setting is represented by a parameter (e.g., parameter OffsetToCarrier) provided by the RRC layer. The offset setting and the bandwidth setting are settings for configuring an SCS-specific carrier.

[0027] For a certain subcarrier spacing setting μ, the subcarrier spacing (SCS: SubCarrier Spacing) Δf can be Δf=2 μ ·15kHz. The subcarrier spacing setting μ can represent any one of 0, 1, 2, 3 or 4.

[0028] Figure 2 is a setting μ of the subcarrier spacing and the number N of OFDM symbols per time slot according to one embodiment of the present invention. slot symb And an example of the relationship between CP (cyclic prefix) settings. Figure 2 In A, for example, when the subcarrier spacing μ is set to 2 and the CP is set to a normal cyclic prefix (CP), N slot symb =14, N frame,μ slot =40, N subframe,μ slot =4. In addition, Figure 2 In B, for example, when the subcarrier spacing μ is set to 2 and the CP is set to an extended CP (extended cyclic prefix), N slot symb =12, N frame,μ slot =40, N subframe,μ slot =4.

[0029] Time unit (time unit) T c Can be used to indicate the length of the time domain. Time unit T c It is T c =1 / (Δf max ·N f ). Δf max =480kHz. f =4096. The constant κ is κ = Δf max ·N f / (Δf ref N f,ref )=64. Δf ref is 15kHz. f,ref It is 2048.

[0030] The transmission of the signal in the downlink and / or the transmission of the signal in the uplink may be performed by a transmission of length T f The wireless frames (system frames, frames) are organized into (organized into). f =(Δf max N f / 100)·T s = 10ms. The radio frame consists of 10 subframes. The length of the subframe is T sf =(Δf max N f / 1000)·T s =1ms. The number of OFDM symbols in each subframe is N subframe,μ symb =N slot symb N subframe,μ slot .

[0031] The OFDM symbol is a unit of the time domain of a communication method. For example, the OFDM symbol can be a unit of the time domain of CP-OFDM. In addition, the OFDM symbol can be a unit of the time domain of DFT-s-OFDM.

[0032] A time slot can be constructed to include multiple OFDM symbols. For example, a time slot can be composed of N consecutive OFDM symbols. slot symb OFDM symbols. For example, in a conventional CP setting, it can be N slot symb =14. In addition, in the conventional CP setting, N slot symb =12.

[0033] The number and index of the time slots included in the subframe can be given for setting μ for a certain subcarrier spacing. For example, the time slot index n μ s In the subframe, it can be subframe,μ slot -1 in ascending order. The number and index of the time slots included in the radio frame can also be given for setting the subcarrier spacing μ. In addition, the time slot index n μ s,f It can also be in the wireless frame from 0 to N frame,μ slot Integer values ​​in the range -1 are given in ascending order.

[0034] Figure 3 This is a diagram showing an example of a method of configuring a resource grid according to one aspect of the present embodiment. Figure 3 The horizontal axis represents the frequency domain. Figure 3 , an example of a resource grid configuration of a subcarrier spacing μ1 in component carrier 300 and an example of a resource grid configuration of a subcarrier spacing μ2 in a certain component carrier are shown. In this way, one or more subcarrier spacings can be set for a certain component carrier. Figure 3 In the example, it is assumed that μ1=μ2-1, but the various aspects of the present embodiment are not limited to the condition of μ1=μ2-1.

[0035] Component carrier 300 is a frequency band having a predetermined width in the frequency domain.

[0036] Point 3000 is an identifier for identifying a certain subcarrier. Point 3000 is also referred to as point A. Common resource block (CRB) set 3100 is a set of common resource blocks for the subcarrier spacing setting μ1.

[0037] The common resource block set 3100 includes the common resource blocks of point 3000 ( Figure 3 The black monochrome block in the common resource block set 3100 in FIG. 3 is also referred to as a reference point of the common resource block set 3100 . The reference point of the common resource block set 3100 may also be a common resource block with index 0 in the common resource block set 3100 .

[0038] Offset 3011 is the offset from the reference point of common resource block set 3100 to the reference point of resource grid 3001. Offset 3011 is represented by the number of common resource blocks for the setting μ1 of subcarrier spacing. Resource grid 3001 includes N starting from the reference point of resource grid 3001. size,μ grid1,x A common resource block.

[0039] The offset 3013 is the distance from the reference point of the resource grid 3001 to the reference point (N) of the BWP (BandWidth Part) 3003 of the index i1. start,μ BWP,i1 ) offset.

[0040] The common resource block set 3200 is a set of common resource blocks for the subcarrier spacing setting μ2.

[0041] The common resource block set 3200 includes the common resource blocks of point 3000 ( Figure 3 The black monochrome 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 also be the common resource block of index 0 in the common resource block set 3200.

[0042] Offset 3012 is an offset from a reference point of common resource block set 3200 to a reference point of resource grid 3002. Offset 3012 is represented by the number of common resource blocks for subcarrier spacing μ2. Resource grid 3002 includes N size,μ grid2,x A common resource block.

[0043] 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 (N start,μ BWP,i2 ) offset.

[0044] Figure 4 FIG. 3 is a diagram showing an example of the configuration of a resource grid 3001 according to one embodiment of the present invention. Figure 4 In the resource grid, the horizontal axis is the OFDM symbol index l sym , the vertical axis is the subcarrier index k sc The resource grid 3001 includes N size,μ grid1,x N RB sc subcarriers, including N subframe,μ symb OFDM symbols. Within the resource grid, subcarrier index k sc and OFDM symbol index l sym The identified resource is called a resource element (RE: Resource Element).

[0045] Resource Block (RB) includes N RB sc A resource block is a general term for a common resource block, a physical resource block (PRB) and a virtual resource block (VRB). RB SC =12.

[0046] The resource block unit is a set of resources corresponding to one OFDM symbol in one resource block. That is, one resource block unit includes 12 resource elements corresponding to one OFDM symbol in one resource block.

[0047] The common resource blocks for a certain subcarrier spacing setting μ are indexed in ascending order starting from 0 in the frequency domain in a certain common resource block set. The common resource blocks with index 0 for a certain subcarrier spacing setting μ include (or contend for, or agree on) point 3000. The index n of the common resource blocks for a certain subcarrier spacing setting μ isμ CRB Satisfy n μ CRB =ceil(k sc / N RB sc ). Here, k sc The subcarrier with =0 is a subcarrier having the same center frequency as the center frequency of the subcarrier corresponding to point 3000.

[0048] The physical resource blocks for a certain subcarrier spacing setting μ are indexed in ascending order starting from 0 in the frequency domain in a certain BWP. The index n of the physical resource block for a certain subcarrier spacing setting μ is μ PRB Satisfy n μ CRB =n μ PRB +N start ,μ BWP,i Here, N start,μ BWP,i Represents the reference point of the BWP with index i.

[0049] BWP is defined as a subset of common resource blocks included in the resource grid. BWP includes a reference point N from the BWP. start,μ BWP,i Starting N size,μ BWP,i Common resource blocks. The BWP set for a downlink carrier is also called a downlink BWP. The BWP set for an uplink component carrier is also called an uplink BWP.

[0050] An antenna port may be defined as follows: 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. In addition, a symbol may correspond to an OFDM symbol. In addition, a symbol may correspond to a resource block unit. In addition, a symbol may correspond to a resource element.

[0051] The large-scale property of a channel that transmits symbols in one antenna port can be estimated based on the channel that transmits symbols in another antenna port, which is called two antenna ports being QCL (Quasi Co-Located). Among them, the large-scale property may include at least the long-term property of the channel. The large-scale property may also include at least a part 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 may be QCL with respect to the beam parameters, and the receiving beam assumed by the receiving side for the first antenna port and the receiving beam assumed by the receiving side for the second antenna port may be the same (or corresponding). The first antenna port and the second antenna port may be QCL with respect to the beam parameters, and the transmitting beam assumed by the receiving side for the first antenna port and the transmitting beam assumed by the receiving side for the second antenna port may be the same (or corresponding). Terminal device 1 may assume that two antenna ports are QCL when the large-scale characteristics of the channel through which symbols are transmitted through one antenna port can be estimated from the channel through which symbols are transmitted through another antenna port. Two antenna ports being QCL may also mean assuming that two antenna ports are QCL.

[0052] The QCL of two antenna ports of type A may be the first large-scale characteristic of the channel for transmitting symbols in one antenna port, which can be estimated based on the channel for transmitting symbols in another antenna port. The QCL of two antenna ports of type B may be the second large-scale characteristic of the channel for transmitting symbols in one antenna port, which can be estimated based on the channel for transmitting symbols in another antenna port. The QCL of two antenna ports of type C may be the third large-scale characteristic of the channel for transmitting symbols in one antenna port, which can be estimated based on the channel for transmitting symbols in another antenna port. The QCL of two antenna ports of type D may be the fourth large-scale characteristic of the channel for transmitting symbols in one antenna port, which can be estimated based on the channel for transmitting symbols in another antenna port. The first large-scale characteristic may include all of Doppler shift, Doppler spread, average 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 Doppler shift and average delay. The fourth large-scale characteristic may include spatial reception parameters (information of spatial direction, information of beam). The antenna port of DMRS may be a DMRS port. The antenna port for PTRS may be a PTRS port. The antenna port associated with PTRS may be a PTRS port. The antenna port used for SRS may be an SRS port. The antenna port used for DMRS may be a DMRS port. The antenna port associated with DMRS may be a DMRS port.

[0053] Carrier aggregation may be the use of multiple aggregated service cells for communication. In addition, carrier aggregation may also be the use of multiple aggregated component carriers for communication. In addition, carrier aggregation may also be the use of multiple aggregated downlink component carriers for communication. In addition, carrier aggregation may also be the use of multiple aggregated uplink component carriers for communication.

[0054] Figure 5 1 is a schematic block diagram showing an example of the configuration of a base station device 3 according to one embodiment of the present invention. Figure 5 As shown, the base station device 3 includes at least a part or all of a wireless transceiver unit (physical layer processing unit) 30 and / or an upper layer (Higher layer) processing unit 34. The wireless transceiver unit 30 includes at least an antenna unit 31, an RF (Radio Frequency) unit 32, and a part or all of a baseband unit 33. The upper layer processing unit 34 includes at least a part or all of a media access control layer processing unit 35 and a radio resource control (RRC: Radio Resource Control) layer processing unit 36.

[0055] The wireless transceiver unit 30 includes at least a part or all of the wireless transmission unit 30a and the wireless reception unit 30b. Here, the device configuration of the baseband unit included in the wireless transmission unit 30a and the baseband unit included in the wireless reception unit 30b may be the same or different. In addition, the device configuration of the RF unit included in the wireless transmission unit 30a and the RF unit included in the wireless reception unit 30b may be the same or different. In addition, the device configuration of the antenna unit included in the wireless transmission unit 30a and the antenna unit included in the wireless reception unit 30b may be the same or different.

[0056] For example, the wireless transmission unit 30a may generate and transmit a baseband signal of the PDSCH. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of the PDCCH. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of the PBCH. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of a synchronization signal. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of a PDSCH DMRS. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of a PDCCH DMRS. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of a CSI-RS. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of a DL PTRS.

[0057] For example, the wireless receiving unit 30b may receive PRACH. For example, the wireless receiving unit 30b may also receive and demodulate PUCCH. The wireless receiving unit 30b may also receive and demodulate PUSCH. For example, the wireless receiving unit 30b may also receive PUCCH DMRS. For example, the wireless receiving unit 30b may also receive PUSCH DMRS. For example, the wireless receiving unit 30b may also receive ULPTRS. For example, the wireless receiving unit 30b may also receive SRS.

[0058] The upper layer processing unit 34 outputs the downlink data (transmission block) to the wireless transceiver unit 30 (or the wireless transmission unit 30a). The upper layer processing unit 34 performs processing on the MAC (Medium Access Control) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the RRC layer.

[0059] The media access control layer processing unit 35 included in the upper layer processing unit 34 performs processing at the MAC layer.

[0060] The radio resource control layer processing unit 36 ​​included in the upper layer processing unit 34 performs RRC layer processing. The radio resource control layer processing unit 36 ​​manages various setting information / parameters (RRC parameters) of the terminal device 1. The radio resource control layer processing unit 36 ​​sets the RRC parameters based on the RRC message received from the terminal device 1.

[0061] The wireless transceiver 30 (or the wireless transmission unit 30a) performs modulation, coding and other processing. The wireless transceiver 30 (or the wireless transmission unit 30a) generates a physical signal by modulating, coding and generating a baseband signal (converting into a time-continuous signal) the downlink data, and transmits it to the terminal device 1. The wireless transceiver 30 (or the wireless transmission unit 30a) can configure the physical signal to a component carrier and transmit it to the terminal device 1.

[0062] The wireless transceiver 30 (or wireless receiving unit 30b) performs demodulation, decoding and other processing. The wireless transceiver 30 (or wireless receiving unit 30b) separates, demodulates and decodes the received physical signal, and outputs the decoded information to the upper layer processing unit 34. The wireless transceiver 30 (or wireless receiving unit 30b) can implement a channel access process before sending the physical signal.

[0063] The RF unit 32 converts (down converts) the signal received via the antenna unit 31 into a baseband signal by orthogonal demodulation, and removes unnecessary frequency components. The RF unit 32 outputs the processed analog signal to the baseband unit.

[0064] The baseband unit 33 converts the analog signal input from the RF unit 32 into a digital signal. The baseband unit 33 removes a portion corresponding to the CP (Cyclic Prefix) from the converted digital signal, performs a fast Fourier transform (FFT) on the signal after the CP is removed, and extracts a signal in the frequency domain.

[0065] The baseband unit 33 performs an inverse fast Fourier transform (IFFT) on the data to generate OFDM symbols, adds a CP to the generated OFDM symbols to generate 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.

[0066] The RF unit 32 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 33, up-converts the analog signal to a carrier frequency, and transmits it via the antenna unit 31. In addition, the RF unit 32 may also have a function of controlling the transmission power. The RF unit 32 is also called a transmission power control unit.

[0067] One or more serving cells (or component carriers, downlink component carriers, uplink component carriers) may be configured for the terminal device 1 .

[0068] Each serving cell configured for the terminal device 1 may be any one of a PCell (Primary cell), a PSCell (Primary SCG cell), and a SCell (Secondary Cell).

[0069] The PCell is a serving cell included in the MCG (Master Cell Group). The PCell is a cell in which the terminal device 1 performs an initial connection establishment procedure or a connection re-establishment procedure (an already performed cell).

[0070] The PSCell is a serving cell included in an SCG (Secondary Cell Group) and is a serving cell to which the terminal device 1 performs random access.

[0071] The SCell may be included in either the MCG or the SCG.

[0072] 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 used through carrier aggregation.

[0073] One or more downlink BWPs may be configured for each serving cell (or downlink component carrier). One or more uplink BWPs may be configured for each serving cell (or uplink component carrier).

[0074] One of the one or more downlink BWPs set for the serving cell (or downlink component carrier) may be set as an activated downlink BWP (or one downlink BWP may be activated). One of the one or more uplink BWPs set for the serving cell (or uplink component carrier) may be set as an activated uplink BWP (or one uplink BWP may be activated).

[0075] PDSCH, PDCCH and CSI-RS can be received in the activated downlink BWP. Terminal device 1 can attempt to receive PDSCH, PDCCH and CSI-RS in the activated downlink BWP. PUCCH and PUSCH can be sent in the activated uplink BWP. Terminal device 1 can send PUCCH and PUSCH in the activated uplink BWP. The activated downlink BWP and the activated uplink BWP are collectively referred to as the activated BWP.

[0076] It is also possible not to receive PDSCH, PDCCH and CSI-RS in a downlink BWP other than the activated downlink BWP (inactivated downlink BWP). The terminal device 1 may also attempt to receive PDSCH, PDCCH and CSI-RS in a downlink BWP that is not an activated downlink BWP. It is also possible not to send PUCCH and PUSCH in an uplink BWP that is not an activated uplink BWP (inactivated uplink BWP). The terminal device 1 may also not send PUCCH and PUSCH in an uplink BWP that is not an activated uplink BWP. Inactivated downlink BWP and inactivated uplink BWP are collectively referred to as inactivated BWP.

[0077] Downlink BWP switching is a process for deactivating an activated downlink BWP of a certain serving cell and activating any one of the inactivated downlink BWPs of the certain serving cell. Downlink BWP switching can be controlled by the BWP field included in the downlink control information. Downlink BWP switching can also be controlled based on upper layer parameters.

[0078] The uplink BWP switching is used to deactivate an activated uplink BWP and activate any of the inactivated uplink BWPs that are not the activated uplink BWP. The uplink BWP switching can be controlled by the BWP field included in the downlink control information. The uplink BWP switching can also be controlled based on the parameters of the upper layer.

[0079] Two or more downlink BWPs among one or more downlink BWPs set for the serving cell may not be set as the activated downlink BWPs. Alternatively, one downlink BWP may be activated for the serving cell at a certain time.

[0080] Two or more uplink BWPs among one or more uplink BWPs configured for the serving cell may not be configured as activated uplink BWPs. One uplink BWP may be activated for the serving cell at a certain time.

[0081] Figure 6 1 is a schematic block diagram showing an example of the configuration of a terminal device 1 according to one embodiment of the present invention. Figure 6 As shown, the terminal device 1 includes at least one or all of a wireless transceiver unit (physical layer processing unit) 10 and an upper layer processing unit 14. The wireless transceiver unit 10 includes at least a part or all of an antenna unit 11, an RF unit 12, and a baseband unit 13. The upper layer processing unit 14 includes at least a part or all of a media access control layer processing unit 15 and a wireless resource control layer processing unit 16.

[0082] The wireless transceiver 10 includes at least a part or all of a wireless transmitting unit 10a and a wireless receiving unit 10b. Here, the device configuration of the baseband unit 13 included in the wireless transmitting unit 10a and the baseband unit 13 included in the wireless receiving unit 10b may be the same or different. In addition, the device configuration of the RF unit 12 included in the wireless transmitting unit 10a and the RF unit 12 included in the wireless receiving unit 10b may be the same or different. In addition, the device configuration of the antenna unit 11 included in the wireless transmitting unit 10a and the antenna unit 11 included in the wireless receiving unit 10b may be the same or different.

[0083] For example, the wireless transmission unit 10a may generate and transmit a baseband signal of PRACH. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of PUCCH. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of PUSCH. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of PUCCH DMRS. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of PUSCH DMRS. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of ULPTRS. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of SRS. Generating a baseband signal of SRS may be generating an SRS sequence.

[0084] 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 and demodulate the PBCH. For example, the wireless receiving unit 10b may receive a synchronization signal. For example, the wireless receiving unit 10b may receive a PDSCH DMRS. For example, the wireless receiving unit 10b may receive a PDCCH DMRS. For example, the wireless receiving unit 10b may receive a CSI-RS. For example, the wireless receiving unit 10b may receive a DLPTRS.

[0085] The upper layer processing unit 14 outputs uplink data (transport block) to the wireless transceiver unit 10 (or the wireless transmission unit 10a). The upper layer processing unit 14 performs processing of the MAC layer, the packet data convergence protocol layer, the radio link control layer, and the RRC layer.

[0086] The media access control layer processing unit 15 included in the upper layer processing unit 14 performs processing at the MAC layer.

[0087] The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs RRC layer processing. The radio resource control layer processing unit 16 manages various setting information / parameters (RRC parameters) of the terminal device 1. The radio resource control layer processing unit 16 sets the RRC parameters based on the RRC message received from the base station device 3.

[0088] The wireless transceiver 10 (or the wireless transmission unit 10a) performs modulation, coding and other processing. The wireless transceiver 10 (or the wireless transmission unit 10a) generates a physical signal by modulating, coding and generating a baseband signal (converting to a time-continuous signal) the uplink data, and transmits it to the base station device 3. The wireless transceiver 10 (or the wireless transmission unit 10a) can configure the physical signal to a certain BWP (activate the uplink BWP) and transmit it to the base station device 3.

[0089] The wireless transceiver 10 (or wireless receiving unit 10b) performs demodulation, decoding and other processing. The wireless transceiver 10 (or wireless receiving unit 30b) can receive a physical signal in a certain BWP (activated downlink BWP) of a certain serving cell. The wireless transceiver 10 (or wireless receiving unit 10b) separates, demodulates and decodes the received physical signal, and outputs the decoded information to the upper layer processing unit 14. The wireless transceiver 10 (wireless receiving unit 10b) can implement a channel access process before sending a physical signal.

[0090] The RF unit 12 converts the signal received by the antenna unit 11 into a baseband signal by orthogonal demodulation (down conversion) and removes unnecessary frequency components. The RF unit 12 outputs the processed analog signal to the baseband unit 13 .

[0091] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 removes a portion corresponding to a CP (Cyclic Prefix) from the converted digital signal, performs a fast Fourier transform (FFT) on the signal after the CP is removed, and extracts a signal in the frequency domain.

[0092] The baseband unit 13 performs an inverse fast Fourier transform (IFFT) on the uplink data to generate OFDM symbols, adds a CP to the generated OFDM symbols to generate a baseband digital signal, and converts the baseband digital signal into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

[0093] The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, up-converts the analog signal into a carrier frequency, and transmits it via the antenna unit 11. In addition, the RF unit 12 may also have a function of controlling the transmission power. The RF unit 12 is also called a transmission power control unit.

[0094] The following describes the physical signal (signal).

[0095] Physical signal is the general term for downlink physical channel, downlink physical signal, uplink physical channel and uplink physical channel. Physical channel is the general term for downlink physical channel and uplink physical channel. Physical signal is the general term for downlink physical signal and uplink physical signal.

[0096] An uplink physical channel may correspond to a set of resource elements used to transmit information generated in an upper layer. An uplink physical channel may be a physical channel used in an uplink component carrier. An uplink physical channel may be transmitted by a terminal device 1. An uplink physical channel may be received by a base station device 3. In a wireless communication system of one embodiment of the present invention, at least some or all of the following uplink physical channels may be used. PUCCH (Physical Uplink Control CHannel: Physical Uplink Control Channel) PUSCH (Physical Uplink Shared CHannel: Physical Uplink Shared Channel) PRACH (Physical Random Access CHannel)

[0097] PUCCH can be used to send uplink control information (UCI: Uplink Control Information). PUCCH can be sent to deliver (deliver, transmit, convey) uplink control information. Uplink control information can be configured (mapped) on PUCCH. Terminal device 1 can send PUCCH configured with uplink control information. Base station device 3 can receive PUCCH configured with uplink control information.

[0098] The uplink control information (uplink control information bit, uplink control information sequence, uplink control information type) includes at least part or all of the channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), and HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement: Hybrid Automatic Repeat request ACKnowledgement) information.

[0099] 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.

[0100] The HARQ-ACK information may include at least a HARQ-ACK corresponding to a transport block (TB). HARQ-ACK may represent an ACK (acknowledgement) or a NACK (negative-acknowledgement) corresponding to the transport block. ACK may indicate that the decoding of the transport block has been successfully completed (has been decoded). NACK may indicate that the decoding of the transport block has not been successfully completed (has not been decoded). The HARQ-ACK information may also include a HARQ-ACK codebook containing one or more HARQ-ACK bits.

[0101] A transport block is an information bit sequence delivered from an upper layer. The information bit sequence is also called a bit sequence. The transport block can be distributed via the UL-SCH (UpLink-Shared Channel) of the transport layer.

[0102] One information bit may represent "0" or "1". The fields included in the DCI format may be composed of one or more information bits. The unit of the number of information bits may also be bit. n information bits may represent a value of a maximum power of 2^n.

[0103] The HARQ-ACK for the transport block may be referred to as the HARQ-ACK for the PDSCH. In this case, the "HARQ-ACK for the PDSCH" means the HARQ-ACK for the transport block included in the PDSCH.

[0104] HARQ-ACK may also represent ACK or NACK corresponding to a CBG (Code Block Group) included in a transport block.

[0105] The scheduling request can be used at least to request the resources of the UL-SCH for the initial transmission (new transmission). The scheduling request bit can be used to indicate either a positive SR or a negative SR. The scheduling request bit indicating a positive SR is also referred to as "transmitting a positive SR". A positive SR can indicate that the terminal device 1 requests the resources of the UL-SCH for the initial transmission. A positive SR can also indicate that the scheduling request is triggered by an upper layer. A positive SR can be transmitted in the case of indicating that the scheduling request is sent by the upper layer. The scheduling request bit indicating a negative SR is also referred to as "transmitting a negative SR". A negative SR can indicate that the resources of the UL-SCH for the initial transmission are not requested by the terminal device 1. A negative SR can also indicate that the scheduling request is not triggered by the upper layer. A negative SR can be transmitted in the case of not indicating that the scheduling request is sent by the upper layer.

[0106] The channel state information may include at least a part or all of a channel quality indicator (CQI: Channel Quality Indicator), a precoding matrix indicator (PMI: Precoder Matrix Indicator) and a rank indicator (RI: Rank Indicator). CQI is an indicator associated with the quality of a transmission path (e.g., transmission strength) or the quality of a physical channel, and PMI is an indicator associated with precoding. RI is an indicator associated with a transmission rank (or number of transmission layers).

[0107] The channel state information is an indicator of the reception state of a physical signal (e.g., CSI-RS) at least used for channel measurement. The value of the channel state information can be determined by the terminal device 1 based on the reception state assumed by at least the physical signal used for channel measurement. Channel measurement may include interference measurement.

[0108] PUCCH may correspond to a PUCCH format. PUCCH may be a set of resource elements used to transmit a PUCCH format. PUCCH may include a PUCCH format. PUCCH may be sent in a certain PUCCH format. It should be noted that a PUCCH format may be interpreted as an information format. In addition, a PUCCH format may also be interpreted as an information set set in a certain information format.

[0109] PUSCH can also be used to transmit one or both of a transport block and uplink control information. A transport block can be configured in PUSCH. A transport block distributed by UL-SCH can be configured in PUSCH. Uplink control information can be configured in PUSCH. Terminal device 1 can send a PUSCH configured with one or both of a transport block and uplink control information. Base station device 3 can receive a PUSCH configured with one or both of a transport block and uplink control information.

[0110] PRACH may also be sent to deliver a random access preamble. Terminal device 1 may send PRACH. Base station device 3 may receive PRACH. PRACH sequence x u,v (n) by x u,v (n) = x u (mod(n+C v ,L RA )) is defined. Among them, x u is a ZC (Zadoff Chu) sequence. In addition, x u You can use x u =exp(-jπui(i+1) / L RA ). j is an imaginary unit. In addition, π is the circumference of a circle. In addition, C v corresponds to the cyclic shift of the PRACH sequence. RA Corresponds to the length of the PRACH sequence. In addition, L RA is 839 or 139. In addition, i is 0 to L RA An integer in the range of -1. In addition, u is the sequence index of the PRACH sequence.

[0111] 64 random access preambles are defined for each PRACH opportunity. The random access preamble is based on the cyclic shift C of the PRACH sequence. v The index may be added to each of the determined 64 random access preambles.

[0112] An uplink physical signal may correspond to a set of resource elements. An uplink physical signal may not be used to transmit information generated in an upper layer. It should be noted that an uplink physical signal may also be used to transmit information generated in a physical layer. An uplink physical signal may be a physical signal used in an uplink component carrier. The terminal device 1 may send an uplink physical signal. The base station device 3 may receive an uplink physical signal. In a wireless communication system of one embodiment of the present invention, 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)

[0113] UL DMRS is a general term for DMRS for PUSCH and DMRS for PUCCH.

[0114] The set of antenna ports for DMRS for PUSCH (DMRS associated with PUSCH, DMRS included in PUSCH, DMRS corresponding to PUSCH) may be given based on the set of antenna ports for the PUSCH. For example, the set of antenna ports for DMRS for PUSCH may be the same as the set of antenna ports for the PUSCH.

[0115] The transmission of a PUSCH and the transmission of a DMRS for the PUSCH may be represented (or scheduled) by one DCI format. The PUSCH and the DMRS for the PUSCH may be collectively referred to as a PUSCH. Transmitting a PUSCH may also be transmitting a PUSCH and a DMRS for the PUSCH.

[0116] The propagation path of the PUSCH can be estimated based on the DMRS used for the PUSCH.

[0117] The set of antenna ports for the DMRS of the PUCCH (DMRS associated with the PUCCH, DMRS included in the PUCCH, DMRS corresponding to the PUCCH) may be the same as the set of antenna ports of the PUCCH.

[0118] The transmission of the PUCCH and the transmission of the DMRS for the PUCCH may be indicated (or triggered) by a DCI format. One or both of the mapping of the PUCCH to resource elements and the mapping of the DMRS for the PUCCH to resource elements may be given by a PUCCH format. The PUCCH and the DMRS for the PUCCH may be collectively referred to as the PUCCH. Transmitting the PUCCH may also be transmitting the PUCCH and the DMRS for the PUCCH.

[0119] The propagation path of the PUCCH can be estimated by the DMRS used for the PUCCH.

[0120] A downlink physical channel may correspond to a set of resource elements that transmit information generated in an upper layer. A downlink physical channel may be a physical channel used in a downlink component carrier. The base station device 3 may transmit a downlink physical channel. The terminal device 1 may receive a downlink physical channel. In a wireless communication system of one embodiment of the present invention, 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)

[0121] PBCH can be sent to transmit one or both of MIB (Master Information Block) and physical layer control information. Here, physical layer control information is information generated at the physical layer. MIB is a set of parameters configured in BCCH (Broadcast Control Channel), which is a logical channel of the MAC layer. The BCCH is configured in BCH, which is a channel of the transport layer. BCH can be configured (mapped) to PBCH. Terminal device 1 can receive PBCH configured with one or both of MIB and physical layer control information. Base station device 3 can send PBCH configured with one or both of MIB and physical layer control information.

[0122] For example, the physical layer control information may be composed of 8 bits. The physical layer control information may include at least a part or all of the following 0A to 0D. 0A) Wireless frame bits 0B) Half radio frame (half system frame, half frame) bit 0C) SS / PBCH block index bit 0D) Subcarrier offset bit

[0123] The radio frame bit is used to indicate the radio frame in which the PBCH is sent (including the radio frame of the time slot in which the PBCH is sent). The radio frame bit includes 4 bits. The radio frame bit can be composed of 4 bits in the 10-bit radio frame indicator. For example, the radio frame indicator can be used to determine at least the radio frames of index 0 to index 1023.

[0124] The half radio frame bit is used to indicate in which of the first half of the 5 subframes or the second half of the 5 subframes in the radio frame in which the PBCH is transmitted, the PBCH is transmitted. Here, the half radio frame may be configured to include 5 subframes. In addition, the half radio frame may be configured to include the first half of the 5 subframes of the 10 subframes included in the radio frame. In addition, the half radio frame may also be configured to include the second half of the 5 subframes of the 10 subframes included in the radio frame.

[0125] The SS / PBCH block index bit is used to indicate the SS / PBCH block index. The SS / PBCH block index bit includes 3 bits. The SS / PBCH block index bit may also be composed of 3 bits in the 6-bit SS / PBCH block index indicator. The SS / PBCH block index indicator may be used to determine at least SS / PBCH blocks of index 0 to index 63.

[0126] The subcarrier offset bit is used to indicate the subcarrier offset. The subcarrier offset can also be used to indicate the difference between the subcarrier at the start point of mapping the PBCH and the subcarrier at the start point of the control resource set with mapping index 0.

[0127] The PDCCH may be sent to transmit downlink control information (DCI: Downlink Control Information). The downlink control information may be configured (mapped) on the PDCCH. The terminal device 1 may receive the PDCCH configured with the downlink control information. The base station device 3 may send the PDCCH configured with the downlink control information.

[0128] The downlink control information may be sent with a DCI format. It should be noted that the DCI format may be interpreted as the format of the downlink control information. In addition, the DCI format may also be interpreted as a set of downlink control information set in a certain format of downlink control information.

[0129] DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1 are DCI formats. The uplink 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.

[0130] DCI format 0_0 is used to configure at least PUSCH scheduling in a certain cell. DCI format 0_0 is configured to include at least a part or all of the fields 1A to 1E. 1A) Identifier field for DCI formats 1B) Frequency domain resource assignment field 1C) Time domain resource assignment field 1D) Frequency hopping flag field 1E)MCS field (MCS field: Modulation and Coding Scheme field: Modulation and Coding Scheme field)

[0131] The DCI format specific field may indicate whether the DCI format including the DCI format specific field is an uplink DCI format or a downlink DCI format. That is, the DCI format specific field may be included in each uplink DCI format and downlink DCI format. Among them, the DCI format specific field included in DCI format 0_0 may represent 0.

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

[0133] The time domain resource allocation field included in DCI format 0_0 may be used to indicate the time resource allocation of the PUSCH.

[0134] The frequency hopping flag field may be used to indicate whether frequency hopping is applied to the PUSCH.

[0135] The MCS field included in DCI format 0_0 may be used to indicate at least one or both of the modulation mode and the target coding rate of the PUSCH. The target coding rate may be a target coding rate of a transport block configured in the PUSCH. The size of the transport block (TBS: Transport Block Size) configured in the PUSCH may be determined based on one or both of the target coding rate and the modulation mode of the PUSCH.

[0136] DCI format 0_0 may not include a field for CSI request (CSI request).

[0137] DCI format 0_0 may also not include a carrier indicator field. That is, the service cell to which the uplink component carrier configured with the PUSCH scheduled by DCI format 0_0 belongs and the service cell to which the uplink component carrier configured with the PDCCH including the DCI format 0_0 belong may be the same. The terminal device 1 may recognize that the PUSCH scheduled by the DCI format 0_0 is configured on the uplink component carrier of a certain service cell based on the detection of DCI format 0_0 in a certain downlink component carrier of the certain service cell.

[0138] DCI format 0_0 may not include a BWP field. DCI format 0_0 may be a DCI format for scheduling PUSCH without changing the activated uplink BWP. Terminal device 1 may recognize that the PUSCH is sent without switching the activated uplink BWP based on detecting DCI format 0_0 for PUSCH scheduling.

[0139] DCI format 0_1 ​​is used to configure at least PUSCH scheduling in a certain cell. DCI format 0_1 ​​is configured to include at least a part or all of the fields 2A to 2H. 2A) DCI format specification field 2B) Frequency Domain Resource Allocation Field 2C) Time domain resource allocation field for uplink 2D) Frequency Hopping Flag Field 2E) MCS field 2F) CSI request field 2G)BWP field 2H) Carrier indicator field

[0140] The DCI format specific field included in DCI format 0_1 ​​may represent 0.

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

[0142] The time domain resource allocation field included in DCI format 0_1 ​​may be used to indicate time resource allocation for PUSCH.

[0143] The MCS field included in DCI format 0_1 ​​may be used to indicate at least part or all of the modulation scheme and / or target coding rate for the PUSCH.

[0144] The BWP field of DCI format 0_1 ​​can be used to indicate the uplink BWP configured with the PUSCH scheduled by the DCI format 0_1. That is, DCI format 0_1 ​​can change according to the activation of the uplink BWP. The terminal device 1 can identify the uplink BWP configured with the PUSCH based on the detection of DCI format 0_1 ​​for PUSCH scheduling.

[0145] DCI format 0_1 ​​not including the BWP field may be a DCI format for scheduling PUSCH without changing the activated uplink BWP. Terminal device 1 is DCI format 0_1 ​​for PUSCH scheduling, and can recognize that the PUSCH is sent without switching the activated uplink BWP based on detecting DCI format D0_1 not including the BWP field.

[0146] The BWP field is included in DCI format 0_1, but in the case where terminal device 1 does not support the function of switching BWP through DCI format 0_1, terminal device 1 can ignore the BWP field. That is, terminal device 1 that does not support the BWP switching function is DCI format 0_1 ​​for PUSCH scheduling, and can recognize that the PUSCH is sent without switching the activated uplink BWP based on the detection of DCI format 0_1 ​​including the BWP field. Among them, in the case where terminal device 1 supports the BWP switching function, in the function information reporting process of the RRC layer, it can be reported that "terminal device 1 supports the BWP switching function".

[0147] The CSI request field is used to indicate a CSI report.

[0148] Alternatively, when the carrier indicator field is included in DCI format 0_1, the carrier indicator field is used to indicate the uplink component carrier configured with the PUSCH. Alternatively, when the carrier indicator field is not included in DCI format 0_1, the uplink component carrier configured with the PUSCH is the same as the uplink component carrier configured with the PDCCH including the DCI format 0_1 ​​for scheduling the PUSCH. Alternatively, when the number of uplink component carriers set for the terminal device 1 in a certain service cell group is 2 or more (when uplink carrier aggregation is used in a certain service cell group), the number of bits of the carrier indicator field included in the DCI format 0_1 ​​for scheduling the PUSCH configured for the certain service cell group is 1 bit or more (for example, 3 bits). It may also be that, when the number of uplink component carriers set for terminal device 1 in a certain service cell group is 1 (when uplink carrier aggregation is not used in a certain service cell group), the number of bits of the carrier indicator field included in the DCI format 0_1 ​​used for scheduling of PUSCH configured for the certain service cell group is 0 (or the carrier indicator field is not included in the DCI format 0_1 ​​used for scheduling of PUSCH configured for the certain service cell group).

[0149] DCI format 1_0 is used to configure at least PDSCH scheduling in a certain cell. DCI format 1_0 is configured to include at least a part or all of 3A to 3F. 3A) DCI format specification field 3B) Frequency Domain Resource Allocation Field 3C) Time Domain Resource Allocation Field 3D)MCS field 3E)PDSCH_HARQ feedback timing indicator field (PDSCH to HARQ feedback timing indicator field) 3F)PUCCH resource indicator field

[0150] The DCI format specific field included in DCI format 1_0 may represent 1.

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

[0152] The time domain resource allocation field included in DCI format 1_0 may be used at least to indicate allocation of time resources for PDSCH.

[0153] The MCS field (MCS) included in DCI format 1_0 may be used to indicate at least one or both of the modulation scheme and the target coding rate for the PDSCH. The target coding rate may be a target coding rate for a transport block configured in the PDSCH. The size of the transport block (TBS: Transport Block Size) configured in the PDSCH may be determined based on one or both of the target coding rate and the modulation scheme for the PDSCH.

[0154] The PDSCH_HARQ Feedback Timing Indication field may be used to indicate an offset from a slot including a last OFDM symbol of a PDSCH to a slot including an OFDM symbol of a start point of a PUCCH.

[0155] The PUCCH resource indication field may be a field indicating any index of one or more PUCCH resources included in a PUCCH resource set. A PUCCH resource set may include one or more PUCCH resources.

[0156] DCI format 1_0 may not include a carrier indicator field. That is, the downlink component carrier configured with the PDSCH scheduled by DCI format 1_0 may be the same as the downlink component carrier configured with the PDCCH including the DCI format 1_0. The terminal device 1 may recognize that the PDSCH scheduled by the DCI format 1_0 is configured on a downlink component carrier based on the detection of DCI format 1_0 in a certain downlink component carrier.

[0157] DCI format 1_0 may not include a BWP field. DCI format 1_0 may be a DCI format for scheduling PDSCH without changing the activated downlink BWP. The terminal device 1 may recognize that the PDSCH is received without switching the activated downlink BWP based on the detection of DCI format 1_0 for PDSCH scheduling.

[0158] DCI format 1_1 is used at least for configuring PDSCH scheduling in a certain cell. DCI format 1_1 may include at least a part or all of 4A to 4I. 4A) DCI format specification field 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 indicator field 4H) BWP field 4I) Carrier Indicator Field

[0159] The DCI format specific field included in DCI format 1_1 may represent 1.

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

[0161] The time domain resource allocation field included in DCI format 1_1 may be used at least to indicate allocation of time resources for PDSCH.

[0162] The MCS field (MCS) included in the DCI format 1_1 may be used to indicate at least one or both of a modulation scheme and a target coding rate for the PDSCH.

[0163] Alternatively, when the PDSCH_HARQ feedback timing indication field is included in the DCI format 1_1, the PDSCH_HARQ feedback timing indication field is at least used to indicate the offset from the time slot including the last OFDM symbol of the PDSCH to the time slot including the OFDM symbol of the starting point of the PUCCH. Alternatively, when the PDSCH_HARQ feedback timing indication field is not included in the DCI format 1_1, the offset from the time slot including the last OFDM symbol of the PDSCH to the time slot including the OFDM symbol of the starting point of the PUCCH is determined by the parameters of the upper layer.

[0164] The PUCCH resource indication field may be a field indicating any one index of one or more PUCCH resources included in a PUCCH resource set.

[0165] The BWP field of DCI format 1_1 can be used to indicate the downlink BWP configured with the PDSCH scheduled by the DCI format 1_1. That is, DCI format 1_1 can change according to the activation of the downlink BWP. The terminal device 1 can identify the downlink BWP configured with the PUSCH based on the detection of DCI format 1_1 for PDSCH scheduling.

[0166] The DCI format 1_1 not including the BWP field may be a DCI format for scheduling the PDSCH without changing the activated downlink BWP. The terminal device 1 is a DCI format 1_1 for PDSCH scheduling, and can recognize that the PDSCH is received without switching the activated downlink BWP based on detecting the DCI format 1_1 not including the BWP field.

[0167] The DCI format 1_1 includes a BWP field, but when the terminal device 1 does not support the function of switching the BWP through the DCI format 1_1, the terminal device 1 can ignore the BWP field. That is, the terminal device 1 that does not support the BWP switching function is the DCI format 1_1 used for PDSCH scheduling, and can recognize that the PDSCH is received without switching the activated downlink BWP based on the detection of the DCI format 1_1 including the BWP field. Among them, when the terminal device 1 supports the BWP switching function, in the function information reporting process of the RRC layer, it can be reported that "the terminal device 1 supports the BWP switching function".

[0168] Alternatively, when the carrier indicator field is included in the DCI format 1_1, the carrier indicator field is used to indicate the downlink component carrier configured with the PDSCH. Alternatively, when the carrier indicator field is not included in the DCI format 1_1, the downlink component carrier configured with the PDSCH is the same as the downlink component carrier configured with the PDCCH including the DCI format 1_1 for scheduling the PDSCH. Alternatively, when the number of downlink component carriers set for the terminal device 1 in a certain service cell group is 2 or more (when downlink carrier aggregation is used in a certain service cell group), the number of bits of the carrier indicator field included in the DCI format 1_1 for scheduling the PDSCH configured for the certain service cell group is 1 bit or more (for example, 3 bits). Alternatively, when the number of downlink component carriers set for terminal device 1 in a certain service cell group is 1 (when downlink carrier aggregation is not used in a certain service cell group), the number of bits of the carrier indicator field included in the DCI format 1_1 used for scheduling of PDSCH configured for the certain service cell group is 0 (or, the carrier indicator field is not included in the DCI format 1_1 used for scheduling of PDSCH configured for the certain service cell group).

[0169] The PDSCH may be sent for delivering a transport block. The PDSCH may also be used to send a transport block distributed by the DL-SCH. The PDSCH may be used to deliver a transport block. The transport block may be configured on the PDSCH. The transport block corresponding to the DL-SCH may also be configured on the PDSCH. The base station device 3 may send the PDSCH. The terminal device 1 may receive the PDSCH.

[0170] A downlink physical signal may correspond to a set of resource elements. A downlink physical signal may not carry information generated in an upper layer. A downlink physical signal may be a physical signal used in a downlink component carrier. A downlink physical signal may be sent by a base station device 3. A downlink physical signal may also be sent by a terminal device 1. In a wireless communication system of one embodiment of the present invention, 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)

[0171] The synchronization signal can be used to synchronize one or both of the frequency domain and the time domain of the downlink for the terminal device 1. The synchronization signal is a general term for PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal).

[0172] Figure 7 FIG. 1 is a diagram showing an example of the configuration of an SS / PBCH block according to one embodiment of the present invention. Figure 7 In the figure, the horizontal axis is the time axis (OFDM symbol index l sym ), the vertical axis represents the frequency domain. In addition, block 700 represents a set of resource elements for PSS. In addition, block 702 represents a set of resource elements for SSS. In addition, four blocks (blocks 710, 711, 712, and 713) represent a set of resource elements for PBCH and DMRS for the PBCH (DMRS associated with PBCH, DMRS included in PBCH, DMRS corresponding to PBCH).

[0173] like Figure 7As shown, the SS / PBCH block includes PSS, SSS and PBCH. In addition, the SS / PBCH block includes 4 consecutive OFDM symbols. The SS / PBCH block includes 240 subcarriers. PSS is configured on the 57th to 183rd subcarriers in the first OFDM symbol. SSS is configured on the 57th to 183rd subcarriers in the third OFDM symbol. The 1st to 56th subcarriers of the first OFDM symbol can be set to zero. The 184th to 240th subcarriers of the first OFDM symbol can also be set to zero. The 49th to 56th subcarriers of the third OFDM symbol can also be set to zero. The 184th to 192nd subcarriers of the third OFDM symbol can also be set to zero. PBCH is configured in the subcarriers that are the 1st to 240th subcarriers of the second OFDM symbol and are not configured with DMRS for PBCH. PBCH is configured in the subcarriers that are the 1st to 48th subcarriers of the third OFDM symbol and are not configured with DMRS for PBCH. The PBCH is configured in the subcarriers which are the 193rd to 240th subcarriers of the third OFDM symbol and to which the DMRS for the PBCH is not configured. The PBCH is configured in the subcarriers which are the 1st to 240th subcarriers of the fourth OFDM symbol and to which the DMRS for the PBCH is not configured.

[0174] The antenna ports of PSS, SSS, PBCH, and DMRS for PBCH may be the same.

[0175] A PBCH conveying a symbol of a PBCH in a certain antenna port may be estimated based on a DMRS for the PBCH that is configured to a slot in which the PBCH is mapped and that is included in a SS / PBCH block including the PBCH.

[0176] DL DMRS is a general term for DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH.

[0177] The set of antenna ports for DMRS for PDSCH (DMRS associated with PDSCH, DMRS included in PDSCH, DMRS corresponding to PDSCH) can be given based on the set of antenna ports for the PDSCH. That is, the set of antenna ports for DMRS for PDSCH can be the same as the set of antenna ports for the PDSCH.

[0178] The transmission of the PDSCH and the transmission of the DMRS for the PDSCH may be indicated (or scheduled) by one DCI format. The PDSCH and the DMRS for the PDSCH may be collectively referred to as the PDSCH. Transmitting the PDSCH may also be transmitting the PDSCH and the DMRS for the PDSCH.

[0179] The transmission path of the PDSCH can be estimated based on the DMRS used for the PDSCH. If a set of resource elements that transmit symbols of a certain PDSCH and a set of resource elements that transmit symbols of the DMRS used for the certain PDSCH are included in the same precoding resource group (PRG: Precoding Resource Group), the PDSCH that transmits the symbols of the PDSCH in a certain antenna port can be estimated based on the DMRS used for the PDSCH.

[0180] The antenna port for the DMRS of the PDCCH (DMRS associated with the PDCCH, DMRS included in the PDCCH, DMRS corresponding to the PDCCH) may be the same as the antenna port for the PDCCH.

[0181] The PDCCH can be estimated based on the DMRS used for the PDCCH. That is, the transmission path of the PDCCH can be estimated based on the DMRS used for the PDCCH. If the same precoding is applied (assumed to be applied, assumed to be applied) in a set of resource elements that convey symbols of a certain PDCCH and a set of resource elements that convey symbols of the DMRS used for the certain PDCCH, then the PDCCH that conveys the symbols of the PDCCH in a certain antenna port can be estimated based on the DMRS used for the PDCCH.

[0182] 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).

[0183] The BCH of the transport layer is mapped to the PBCH of the physical layer. That is, the transport block of the BCH of the transport layer is distributed to the PBCH of the physical layer. In addition, the UL-SCH of the transport layer is mapped to the PUSCH of the physical layer. That is, the transport block of the UL-SCH of the transport layer is distributed to the PUSCH of the physical layer. In addition, the DL-SCH of the transport layer is mapped to the PDSCH of the physical layer. That is, the transport block of the DL-SCH of the transport layer is distributed to the PDSCH of the physical layer.

[0184] One UL-SCH and one DL-SCH may be provided for each serving cell. BCH may be provided by PCell. BCH may also not be provided by PSCell or SCell.

[0185] In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) control is performed on each transport block.

[0186] BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel) and DCCH (Dedicated Control CHannel) are logical channels. For example, BCCH is a channel of the RRC layer for sending MIB or system information. In addition, CCCH (Common Control CHannel) can be used to send RRC messages that are common to multiple terminal devices 1. Here, CCCH can be used for terminal devices 1 that are not RRC connected, for example. In addition, DCCH (Dedicated Control CHannel) can be used at least to send RRC messages dedicated to terminal device 1. Here, DCCH can be used for terminal devices 1 that are RRC connected, for example.

[0187] The upper layer parameters shared by multiple terminal devices 1 are also called common upper layer parameters. The common upper layer parameters can be defined as parameters specific to a service cell. The parameters specific to a service cell can be parameters shared by terminal devices (e.g., terminal devices 1-A, B, C) that set the service cell.

[0188] For example, the common upper layer parameters may be included in an RRC message distributed to the BCCH. For example, the common upper layer parameters may be included in an RRC message distributed to the DCCH.

[0189] In a certain upper layer parameter, an upper layer parameter different from a common upper layer parameter is also referred to as a dedicated upper layer parameter. Among them, the dedicated upper layer parameter can provide a dedicated RRC parameter to the terminal device 1-A that sets the service cell. That is, the dedicated RRC parameter is an upper layer parameter that can provide a specific setting for each of the terminal devices 1-A, B, and C.

[0190] The BCCH of the logical channel can be mapped to the BCH or DL-SCH of the transport layer. For example, a transport block including MIB information is distributed to the BCH of the transport layer. In addition, a transport block including system information other than MIB is distributed to the DL-SCH of the transport layer. In addition, CCCH is mapped to DL-SCH or UL-SCH. That is, the transport block mapped to CCCH is distributed to DL-SCH or UL-SCH. In addition, DCCH is mapped to DL-SCH or UL-SCH. That is, the transport block mapped to DCCH is distributed to DL-SCH or UL-SCH.

[0191] The RRC message includes one or more parameters managed in the RRC layer. Among them, the parameters managed in the RRC layer are also called RRC parameters. For example, the RRC message may include MIB. In addition, the RRC message may also include system information. In addition, the RRC message may also include a message corresponding to the CCCH. In addition, the RRC message may also include a message corresponding to the DCCH. The RRC message including a message corresponding to the DCCH is also called a dedicated RRC message.

[0192] The upper layer parameters (upper layer parameters) are RRC parameters or parameters included in MAC CE (Medium Access Control Control Element: control element of media access control). That is, the upper layer parameters are a general term for MIB, system information, messages corresponding to CCCH, messages corresponding to DCCH, and parameters included in MAC CE. The parameters included in MAC CE are sent through MAC CE (Control Element: control element) commands.

[0193] The process performed by the terminal device 1 includes at least a part or all of the following 5A to 5C. 5A) Cell search 5B) Random access 5C) Data communication

[0194] Cell search is a process for synchronizing a cell in time and frequency domains and detecting a physical cell ID (physical cell identity) through the terminal device 1. That is, the terminal device 1 can synchronize with a cell in time and frequency domains and detect a physical cell ID through cell search.

[0195] The sequence of the PSS is given based on at least the physical cell ID. The sequence of the SSS is given based on at least the physical cell ID.

[0196] The SS / PBCH block candidates indicate resources for which transmission of SS / PBCH blocks is permitted (able to, reserved, set, specified, or possible).

[0197] The set of SS / PBCH block candidates in a half radio frame is also called an SS burst set. An SS burst set is also called a transmission window, an SS transmission window, or a DRS transmission window. An SS burst set is a general term for at least a first SS burst set and a second SS burst set.

[0198] The base station device 3 sends one or more indexed SS / PBCH blocks at a predetermined period. The terminal device 1 can detect at least any one of the one or more indexed SS / PBCH blocks and attempt to decode the PBCH included in the SS / PBCH block.

[0199] Random access is a process including at least part or all of message 1, message 2, message 3 and message 4.

[0200] Message 1 is a process of sending PRACH by terminal device 1. Terminal device 1 sends PRACH in a PRACH opportunity selected from one or more PRACH opportunities based at least on an index of an SS / PBCH block candidate, wherein the index of the SS / PBCH block candidate is detected based on a cell search. Each PRACH opportunity is defined based on at least a time domain resource and a frequency domain resource.

[0201] The terminal device 1 transmits one random access preamble selected from the PRACH opportunities corresponding to the index of the SS / PBCH block candidate for detecting the SS / PBCH block.

[0202] Message 2 is a process of attempting to detect DCI format 1_0 with CRC (Cyclic Redundancy Check) encrypted by RA-RNTI (Random Access-Radio Network Temporary Identifier) ​​by terminal device 1. Terminal device 1 attempts to detect PDCCH including the DCI format in resources indicated based on the settings of control resource set and search area set, wherein the settings of control resource set and search area set are given based on MIB of PBCH included in SS / PBCH block detected based on cell search. Message 2 is also called random access response.

[0203] Message 3 is a process of transmitting a PUSCH scheduled by a random access response grant included in DCI format 1_0 detected by the process of message 2. Here, the random access response grant is indicated by a MAC CE included in a PDSCH scheduled by the DCI format 1_0.

[0204] The PUSCH scheduled based on the random access response grant is any one of the messages 3PUSCH or PUSCH. The message 3PUSCH includes a contention resolution identifier (MAC CE). The contention resolution identifier (MAC CE) includes the contention resolution ID.

[0205] The retransmission of message 3 PUSCH is scheduled by DCI format 0_0 with CRC encrypted based on TC-RNTI (Temporary Cell-Radio Network Temporary Identifier).

[0206] Message 4 is a process of attempting to detect DCI format 1_0 with CRC scrambled based on either C-RNTI (Cell-Radio Network Temporary Identifier) ​​or TC-RNTI. Terminal device 1 receives PDSCH scheduled based on DCI format 1_0. The PDSCH may include a contention resolution ID.

[0207] Data communication is a general term for downlink communication and uplink communication.

[0208] In data communication, the terminal device 1 attempts to detect the PDCCH (monitor the PDCCH, monitor the PDCCH) in resources determined based on the control resource set and the search area set.

[0209] 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 can be composed of continuous resources (non-interleaved mapping) or dispersed resources (interleaver mapping).

[0210] The set of resource blocks constituting the control resource set may be represented by an upper layer parameter. The number of OFDM symbols constituting the control resource set may also be represented by an upper layer parameter.

[0211] Terminal device 1 attempts to detect PDCCH in the search area set. Here, attempting to detect PDCCH in the search area set may be attempting to detect PDCCH candidates in the search area set, or attempting to detect DCI formats in the search area set, or attempting to detect PDCCH in the control resource set, or attempting to detect PDCCH candidates in the control resource set, or attempting to detect DCI formats in the control resource set.

[0212] The search area set is defined as a set of PDCCH candidates. The search area set can be a CSS (Common Search Space) set or a USS (UE-specific Search Space) set. Terminal device 1 attempts to detect PDCCH candidates in part or all of a type 0 PDCCH common search space set, a type 0a PDCCH common search space set, a type 1 PDCCH common search space set, a type 2 PDCCH common search space set, a type 3 PDCCH common search space set, and / or a UE-specific PDCCH search space set.

[0213] The type 0 PDCCH common search region set may be used as the common search region set of index 0. The type 0 PDCCH common search region set may also be the common search region set of index 0.

[0214] The CSS set is a general term for type 0 PDCCH common search area set, type 0a PDCCH common search area set, type 1 PDCCH common search area set, type 2 PDCCH common search area set, and type 3 PDCCH common search area set. The USS set is also called a UE-specific PDCCH search area set.

[0215] A certain search area set is associated with (includes, corresponds to) a certain control resource set. The index of the control resource set associated with the search area set may be represented by an upper layer parameter.

[0216] For a certain search area set, at least a part or all of 6A to 6C may be represented by upper layer parameters. 6A)PDCCH monitoring periodicity 6B)PDCCH monitoring pattern within a slot 6C)PDCCH monitoring offset

[0217] A monitoring occasion of a certain search area set may correspond to an OFDM symbol configured with an OFDM symbol of a starting point of a control resource set associated with the certain search area set. A monitoring occasion of a certain search area set may also correspond to resources of the control resource set starting from an OFDM symbol of a starting point of a control resource set associated with the certain search area set. The monitoring occasion of the search area set is given based on at least a portion or all of a monitoring interval of a PDCCH, a monitoring mode of a PDCCH within a time slot, and a monitoring offset of a PDCCH.

[0218] Figure 8 FIG. 1 is a diagram showing an example of monitoring opportunities of a search area set according to one embodiment of the present invention. Figure 8 In the embodiment, 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 .

[0219] exist Figure 8 In the figure, the monochrome white blocks in the primary cell 301 represent the search area set 91, the monochrome black blocks in the primary cell 301 represent the search area set 92, the blocks in the secondary cell 302 represent the search area set 93, and the blocks in the secondary cell 303 represent the search area set 94.

[0220] The monitoring interval of search area set 91 is set to 1 time slot, the monitoring offset of search area set 91 is set to 0 time slots, and the monitoring pattern of search area set 91 is set to [1,0,0,0,0,0,0,1,0,0,0,0,0,0,0]. That is, the monitoring opportunities of search area set 91 correspond to the starting OFDM symbol (OFDM symbol #0) and the 8th OFDM symbol (OFDM symbol #7) in each time slot.

[0221] The monitoring interval of search area set 92 is set to 2 time slots, the monitoring offset of search area set 92 is set to 0 time slots, and the monitoring pattern of search area set 92 is set to [1,0,0,0,0,0,0,0,0,0,0,0,0,0]. That is, the monitoring opportunity of search area set 92 corresponds to the OFDM symbol (OFDM symbol #0) at the start point in each even time slot.

[0222] The monitoring interval of search area set 93 is set to 2 time slots, the monitoring offset of search area set 93 is set to 0 time slots, and the monitoring pattern of search area set 93 is set to [0,0,0,0,0,0,0,1,0,0,0,0,0,0,0]. That is, the monitoring opportunity of search area set 93 corresponds to the 8th OFDM symbol (OFDM symbol #7) in each even time slot.

[0223] The monitoring interval of search area set 94 is set to 2 time slots, the monitoring offset of search area set 94 is set to 1 time slot, and the monitoring pattern of search area set 94 is set to [1,0,0,0,0,0,0,0,0,0,0,0,0,0]. That is, the monitoring opportunity of search area set 94 corresponds to the OFDM symbol (OFDM symbol #0) at the start point in each odd time slot.

[0224] The type 0 PDCCH common search area set can be used at least for a DCI format that is accompanied by a CRC (Cyclic Redundancy Check) sequence that is scrambled by the SI-RNTI (System Information-Radio Network Temporary Identifier).

[0225] The type 0a PDCCH common search space set can be used at least for a DCI format with a CRC (Cyclic Redundancy Check) sequence scrambled by SI-RNTI (System Information-Radio Network Temporary Identifier).

[0226] The type 1 PDCCH common search area set can be used at least for a DCI format with a CRC sequence scrambled by RA-RNTI (Random Access-Radio Network Temporary Identifier) ​​and / or a CRC sequence scrambled by TC-RNTI (Temporary Cell-Radio Network Temporary Identifier).

[0227] The type 2 PDCCH common search area set may be used for a DCI format with a CRC sequence scrambled by a P-RNTI (Paging-Radio Network Temporary Identifier).

[0228] The type 3 PDCCH common search area set may be used for a DCI format with a CRC sequence scrambled by a C-RNTI (Cell-Radio Network Temporary Identifier).

[0229] The UE-specific PDCCH search area set may be used at least for a DCI format to which a CRC sequence scrambled by a C-RNTI is attached.

[0230] In downlink communication, terminal device 1 detects a downlink DCI format. The detected downlink DCI format is used at least for resource allocation of PDSCH. The detected downlink DCI format is also referred to as a downlink assignment. Terminal device 1 attempts to receive the PDSCH. Based on the PUCCH resource, the HARQ-ACK corresponding to the PDSCH (the HARQ-ACK corresponding to the transport block included in the PDSCH) is reported to base station device 3, wherein the PUCCH resource is indicated based on the detected downlink DCI format.

[0231] In uplink communication, the terminal device 1 detects an uplink DCI format. The detected DCI format is used for at least resource allocation of a PUSCH. The detected uplink DCI format is also called an uplink grant. The terminal device 1 transmits the PUSCH.

[0232] In the configured grant, the uplink grant for scheduling PUSCH is configured for each transmission period of the PUSCH. When the PUSCH is scheduled by an uplink DCI format, part or all of the information indicated by the uplink DCI format may be indicated by the configured uplink grant in the configured scheduling.

[0233] A UL slot may be a slot consisting of UL symbols. A special slot may be a slot consisting of UL symbols, variable symbols, and DL symbols. A DL slot may be a slot consisting of DL symbols.

[0234] The UL symbol may be an OFDM symbol set or indicated for the uplink in time division duplex. The UL symbol may be an OFDM symbol set or indicated for PUSCH, PUCCH, PRACH, or SRS. The UL symbol may be provided by the upper layer parameter tdd-UL-DL-ConfigurationCommon. The UL symbol may also be provided by the upper layer parameter tdd-UL-DL-ConfigurationDedicated. The UL timeslot may be provided by the upper layer parameter tdd-UL-DL-ConfigurationCommon. The UL timeslot may also be provided by the upper layer parameter tdd-UL-DL-ConfigurationDedicated.

[0235] The DL symbol may be an OFDM symbol set or indicated for the downlink in time division duplex. The DL symbol may be an OFDM symbol set or indicated for the PDSCH or PDCCH. The DL symbol may be provided by the upper layer parameter tdd-UL-DL-ConfigurationCommon. The DL symbol may also be provided by the upper layer parameter tdd-UL-DL-ConfigurationDedicated. The DL time slot may be provided by the upper layer parameter tdd-UL-DL-ConfigurationCommon. The DL time slot may also be provided by the upper layer parameter tdd-UL-DL-ConfigurationDedicated.

[0236] The variable symbol may be an OFDM symbol that is not set or indicated as a UL symbol or a DL symbol in an OFDM symbol within a certain period. The certain period may be a period given by the upper layer parameter dl-UL-TransmissionPeriodicity. The variable symbol may be an OFDM symbol set or indicated for PDSCH, PDCCH, PUSCH, PUCCH or PRACH.

[0237] The upper layer parameter tdd-UL-DL-ConfigurationCommon may be a parameter for setting any one of a UL time slot, a DL time slot, and a special time slot for each of one or more time slots. The upper layer parameter tdd-UL-DL-ConfigurationDedicated may be a parameter for setting any one of a UL symbol, a DL symbol, and a variable symbol for a variable symbol in each of the one or more time slots. tdd-UL-DL-ConfigurationCommon may be a common upper layer parameter. tdd-UL-DL-ConfigurationDedicated may be a dedicated upper layer parameter.

[0238] PUSCH-Config can be a dedicated upper layer parameter. PUSCH-ConfigCommon can be a common upper layer parameter. PUSCH-Config can be set for PUSCH transmission per BWP. PUSCH-Config can include multiple upper layer parameters related to PUSCH transmission. PUSCH-Config can be a UE-specific setting. For example, the PUSCH-Config for terminal device 1A, terminal device 1B and terminal device 1C in a cell or the multiple upper layer parameters included in the PUSCH-Config can be different. PUSCH-ConfigCommon can also be set for PUSCH transmission per BWP. PUSCH-ConfigCommon can include multiple upper layer parameters related to PUSCH transmission. PUSCH-ConfigCommon can be a cell-specific setting. For example, the PUSCH-ConfigCommon for terminal device 1A, terminal device 1B and terminal device 1C in a cell can be shared. For example, PUSCH-ConfigCommon can be given by system information.

[0239] The terminal device 1 can decode the PDSCH. For example, the terminal device 1 can decode the corresponding PDSCH according to the detection of the PDCCH. In the transmission method 1 of the PDSCH, the terminal device 1 can assume that the transmission of the base station device 3 is performed in the PDSCH. The transmission of the base station device 3 in the PDSCH can be performed in a maximum of 8 transmission layers in antenna ports 1000 to 1011. The transmission of the base station device 3 in the PDSCH can be performed in antenna ports 1000 to 1023. The transmission of the base station device 3 in the PDSCH can be performed in a maximum of 8 transmission layers in antenna ports 1000 to 1023.

[0240] The PDSCH may be scheduled by the PDCCH. The DMRS reception process for the first PDSCH scheduled by the PDCCH with DCI format 1_1 may be applied to the second PDSCH. The second PDSCH may be a PDSCH scheduled by the PDCCH with DCI format 1_2. The second PDSCH may also be a PDSCH scheduled by the PDCCH with DCI format 4_2.

[0241] As an assumption 1, the terminal device 1 may assume that there is no PDSCH in the OFDM symbol that transmits DMRS. As an assumption 2, the terminal device 1 may assume that there is no PDSCH other than the first PDSCH in the OFDM symbol that transmits DMRS. The first PDSCH may be a PDSCH during an allocation period with two OFDM symbols. As an assumption 3, the terminal device 1 may assume that a single symbol front-loaded DMRS of set type 1 is sent in DMRS port 1000. As an assumption 4, the terminal device 1 may assume that the remaining antenna ports other than DMRS port 1000 are not associated with PDSCH transmission to another terminal device. As an assumption 5, the terminal device 1 may assume that the upper layer parameter dmrs-AdditionalPosition is "pos2" and there are up to two additional single-symbol DMRS in one time slot. The terminal device 1 may assume assumption 5 for PDSCHs of mapping type A and mapping type B. As an assumption 6, the terminal device 1 may assume that there is a PDSCH in the symbol that transmits DMRS. The terminal device 1 may also assume assumption 6 for the PDSCH of mapping type B and during allocation of two OFDM symbols.

[0242] PDSCH can be scheduled by a DCI format. In the case where PDSCH is scheduled by the first DCI format or in the case where PDSCH is received before any dedicated higher layer configuration in one or more upper layer parameters, the terminal device 1 may assume part or all of Assumption 1, Assumption 2, Assumption 3, Assumption 4, Assumption 5, and Assumption 6. The first DCI format may be DCI format 1_0, DCI format 4_0, or DCI format 4_1. One or more upper layer parameters may be part or all of the upper layer parameter dmrs-AdditionalPosition, the upper layer parameter maxLength, and the upper layer parameter dmrs-Type.

[0243] In the case where PDSCH is scheduled by the second DCI format, the terminal device 1 can set the upper layer parameter dmrs-Type, and the set DMRS setting type (setting type) can be used for the PDSCH to be received. In the case where PDSCH is scheduled by the second DCI format, the maximum number of forward DMRS symbols used for PDSCH can be set by the upper layer parameter maxLength given by the upper layer parameter DMRS-DownlinkConfig. The upper layer parameter maxLength can be set to 'len1' or 'len2'. DMRS can be scheduled by DCI (DCI format). When the upper layer parameter maxLength is set to 'len1', a single symbol DMRS (single symbol forward DMRS) can be scheduled for the terminal device 1 by DCI (DCI format). When the upper layer parameter maxLength is set to 'len1', the terminal device 1 can set an additional DMRS (Additional DMRS) for PDSCH by setting the upper layer parameter dmrs-AdditionalPosition of 'pos0', 'pos1', 'pos2' or 'pos3'. When the upper layer parameter maxLength is set to 'len2', single-symbol DMRS and double-symbol DMRS (double-symbol front DMRS) can be scheduled for terminal device 1 via DCI. When the upper layer parameter maxLength is set to 'len2', additional DMRS (Additional DMRS) can be set for PDSCH by setting the upper layer parameter dmrs-AdditionalPosition with 'pos0' or 'pos1'. Terminal device 1 can assume that additional DMRS is received. The second DCI format can be DCI format 1_1 based on a PDCCH with a CRC scrambled by C-RNTI, MCS-C-RNTI or CS-RNTI. The second DCI format can also be DCI format 4_2 based on a PDCCH with a CRC scrambled by G-RNTI or G-CS-RNTI.

[0244] The reference signal can be a general term for DMRS, PTRS and CSI-RS. The terminal device 1 can set one or two scrambling IDs (scrambling identities) for the reference signal inherent to the terminal device through the upper layer. The scrambling ID can be the same for both PDSCH mapping type A and PDSCH mapping type B. The terminal device 1 can schedule on several DMRS ports. The terminal device 1 can schedule on several DMRS ports based on the antenna port index (antenna port number) in DCI format 1_1.

[0245] In DMRS configuration type 1, in the first case, the second case, or the third case, the terminal device 1 may assume that one or more antenna ports are not associated with PDSCH transmission to another terminal device. The first case may be that the terminal device 1 is scheduled by a codeword, and the terminal device 1 is allocated by an antenna port mapped to any index (value of the antenna port field) in {2,9,10,11,30}. The second case may be that the terminal device 1 is scheduled by a codeword, and the terminal device 1 is allocated by an antenna port mapped to any index (value of the antenna port field) in {2,9,10,11,12}. The third case may be that the terminal device 1 is scheduled by two codes. One or more antenna ports may be the remaining orthogonal antenna ports. The first case may be that the terminal device 1 is scheduled by a codeword, and the terminal device 1 is allocated by an antenna port mapped to an index (value of the antenna port field) of {2,9,10,11,30} when DMRS extension is not applied. The first case may also be that the terminal device 1 is scheduled by a codeword, and when the DMRS extension is applied and the upper layer parameter maxLength is 1, the terminal device 1 is allocated by the antenna port mapped to the index (the value of the antenna port field) of {2, 9, 10, 11, 18, 19, 20}. The first case can be determined based on whether the DMRS extension is applied. The first case can also be determined based on whether the DMRS extension is applied and the upper layer parameter maxLength.

[0246] Applying DMRS extension may be setting the upper-layer parameter ExtendedDMRSports. Applying DMRS extension may also be setting the upper-layer parameter ExtendedDMRSports to valid. When the terminal device 1 reports a certain capability (Capability), the DMRS extension may be applied. When the terminal device 1 does not report the certain capability, the DMRS extension may not be applied. When the terminal device 1 does not report the certain capability, the terminal device 1 may not expect to apply the DMRS extension. For example, the certain capability may be reported for one or both of the uplink and the downlink. For example, the upper-layer parameter ExtendedDMRSports may be set for one or both of the uplink and the downlink. For example, the upper-layer parameter ExtendedDMRSports may be set in the upper-layer parameter DMRS-DownlinkConfig, or the upper-layer parameter ExtendedDMRSports may be set in the upper-layer parameter DMRS-UplinkConfig.

[0247] Whether DMRS demodulation assistance is applied may be indicated by the DCI format. For example, whether DMRS demodulation assistance is applied may be indicated by one or both of DCI format 1_1 and DCI format 1_2. For example, whether DMRS demodulation assistance is applied may also be indicated by one or both of DCI format 0_1 ​​and DCI format 0_2.

[0248] 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 PDSCH transmission to another terminal device. The fourth case may be that the terminal device 1 is scheduled by a codeword, and the terminal device 1 is allocated by an antenna port mapped to any index (DMRS port, DMRS port index) in {2, 10, 23}. The fifth case may be that the terminal device 1 is scheduled by a codeword, and the terminal device 1 is allocated by an antenna port mapped to any index (DMRS port, DMRS port index) in {2, 10, 23, 58}.

[0249] In the case where the terminal device 1 receiving the PDSCH scheduled by the first DCI format is set by the first upper layer parameter, the terminal device 1 can assume that the first setting and the second setting are not generated simultaneously for the received PDSCH. The first DCI format may be DCI format 1_2. The first DCI format may also be DCI format 1_0 or DCI format 1_1. The first upper layer parameter may be the upper layer parameter phaseTrackingRS in the upper layer parameter dmrs-DownlinkForPDSCH-MappingTypeA-DCI-1-2. The first upper layer parameter may also be the upper layer parameter phaseTrackingRS in the upper layer parameter dmrs-DownlinkForPDSCH-MappingTypeB-DCI-1-2. The first upper layer parameter may also be the upper layer parameter phaseTrackingRS in the upper layer parameter dmrs-DownlinkForPDSCH-MappingTypeA. The first upper layer parameter may also be the upper layer parameter phaseTrackingRS in the upper layer parameter dmrs-DownlinkForPDSCH-MappingTypeB. The first setting may be to schedule one or more DMRS ports for terminal device 1, and other terminal devices share DMRS resource elements in the same CDM group. The one or more DMRS ports may be one or more DMRS ports from 1004 to 1007. The one or more DMRS ports may also be one or more DMRS ports from 1006 to 1011. In DMRS setting type 1, the one or more DMRS ports may be one or more DMRS ports from DMRS port 1004 to DMRS port 1007. In DMRS setting type 2, the one or more DMRS ports may be one or more DMRS ports from DMRS port 1006 to DMRS port 1011. In DMRS setting type 1, the one or more DMRS ports may be one or more DMRS ports from DMRS port 1004 to DMRS port 1007 and DMRS port 1012 to DMRS port 1015. In DMRS setting type 2, the one or more DMRS ports may be one or more DMRS ports from DMRS port 1006 to DMRS port 1011 and DMRS port 1018 to DMRS port 1023. In the case where DMRS setting type 1 is set and in the case where DMRS extension is applied, the one or more DMRS ports may be one or more DMRS ports of DMRS port 1004 ˜DMRS port 1007 and DMRS port 1012 ˜DMRS port 1015 .In the case of setting DMRS setting type 2, and in the case of applying DMRS extension, the one or more DMRS ports may be one or more DMRS ports of DMRS port 1006 to DMRS port 1011 and DMRS port 1018 to DMRS port 1023. The second setting may be to send PTRS to terminal device 1. Applying DMRS extension may be to set the upper layer parameter ExtendedDMRSports. Applying DMRS extension may also be to set the upper layer parameter ExtendedDMRSports to be valid.

[0250] Terminal device 1 may not expect to set a double-symbol front DMRS (double-symbol front DMRS symbol) and two or more additional DMRS (additional DMRS symbols) at the same time. Setting a double-symbol front DMRS may be that the maximum number of front DMRS symbols used for PDSCH is set by the upper layer parameter maxLength with 'len2' set. The additional DMRS may be given by the upper layer parameter dmrs-AdditionalPosition.

[0251] The terminal device 1 may not expect to assume a different DMRS configuration from the co-scheduled UE(s). The DMRS configuration may be a DMRS configuration associated with the actual number of forward DMRS symbols, the actual number of additional DMRS symbols, the DMRS symbol position, and the DMRS configuration type.

[0252] In the case of receiving a PDSCH scheduled by DCI format 1_1, terminal device 1 may assume that the indicated CDM group includes potential co-scheduled downlink terminal devices (co-scheduled terminal devices, co-scheduled downlink terminal devices), and the indicated CDM group is not used for data transmission. "1", "2", and "3" for the number of DMRS-CDM groups (CDM groups) may correspond to CDM group 0, CDM group {0,1}, and CDM group {0,1,2}, respectively.

[0253] The terminal device 1 may also assume that the number of DMRS-CDM groups (CDM groups) without data is 1. For example, in the case of receiving a PDSCH scheduled by DCI format 1_0, 4_0 or 4_1, the terminal device 1 may also assume that the number of first CDM groups without data is 1. The first CDM group may correspond to CDM group 0 for a PDSCH during an allocation period with two OFDM symbols. The terminal device 1 may also assume that the number of DMRS-CDM groups without data is 2. For example, in the case of receiving a PDSCH scheduled by DCI format 1_0, 4_0 or 4_1, the terminal device 1 may also assume that the number of second CDM groups without data is 2. The second CDM group may correspond to CDM groups {0,1} for a PDSCH other than a PDSCH during an allocation period with two OFDM symbols.

[0254] The terminal device 1 may not expect to receive the first PDSCH. The first PDSCH may be scheduled by DCI indicating a CDM group to which a DMRS port overlapping with a configured CSI-RS resource is attached.

[0255] The terminal device 1 can receive DMRS for PDSCH. In the case where the terminal device 1 receives DMRS and SS / PBCH blocks for PDSCH in one or more OFDM symbols, the terminal device 1 can assume that the DMRS and SS / PBCH blocks are QCL (or QCL of type D). The terminal device 1 may also not expect to receive DMRS in one or more second resource elements that overlap with one or more first resource elements of the SS / PBCH block. The terminal device 1 may also expect different or the same subcarrier spacing to be set for the SS / PBCH block and DMRS in one component carrier. For example, when the first subcarrier spacing of the SS / PBCH block is 240kHz, the terminal device 1 may expect the second subcarrier spacing for DMRS to be different from the first subcarrier spacing.

[0256] When at least one TCI code point indicates two TCI states, and when the terminal device 1 receives the SS / PBCH block and DMRS for PDSCH in the same OFDM symbol, the terminal device 1 can assume that at least one DMRS port and SS / PBCH block for PDSCH is QCL (or QCL of type D).

[0257] When the terminal device 1 is configured by the upper layer parameter PDCCH-Config, and when the terminal device 1 receives the SS / PBCH block and DMRS for PDSCH in the same OFDM symbol, the terminal device 1 may assume that at least one DMRS port and SS / PBCH block for PDSCH is QCL (or QCL of type D). The upper layer parameter PDCCH-Config may include two different values ​​of the upper layer parameter coresetPoolIndex in the upper layer parameter ControlResourceSet.

[0258] When the terminal device 1 is configured by an upper-layer parameter PDCCH-Config including two different values ​​of the upper-layer parameter coresetPoolIndex, the terminal device 1 can be scheduled in multiple PDSCHs repeated in the time domain and the frequency domain through multiple PDCCHs. In this case, the terminal device 1 may not expect to assume different DMRS settings. In addition, in this case, the terminal device 1 may not expect to assume a DMRS port in a CDM group according to two TCI (Transmission Configuration Indication) state indications. The DMRS setting may be a DMRS setting related to the actual number of forward DMRS symbols, the actual number of additional DMRS symbols, the actual DMRS symbol position, and part or all of the DMRS setting type.

[0259] In the case where the terminal device 1 indicates through a DCI including a time domain resource allocation field indicating an entry including an upper layer parameter repetitionNumber in the upper layer parameter PDSCH-TimeDomainResourceAllocation, the terminal device 1 may not be set through the upper layer parameter sfnSchemePdsch. In this case, two TCI states at the code point of the TCI field may be indicated, and DMRS ports in two CDM groups in the antenna port field may be indicated. In this case, the first TCI state may correspond to the first CDM group of the first antenna port, and the second TCI state may correspond to the second CDM group. The first antenna port may be indicated by an antenna port indication table. DCI (DCI format) may be configured to include a TCI field (Transmission Configuration Indication field: transmission configuration indication field). DCI (DCI format) may be configured to include an antenna port field (Antenna port field).

[0260] The process in PTRS reception can be applied to a terminal device 1 receiving a PDSCH scheduled by a first DCI format. The first DCI format can be DCI format 1_2 in which the upper layer parameter phaseTrackingRS is set in the upper layer parameter dmrs-DownlinkForPDSCH-MappingTypeA-DCI-1-2 or the upper layer parameter dmrs-DownlinkForPDSCH-MappingTypeB-DCI-1-2. The first DCI format may also be DCI format 1_0 or DCI format 1_1 in which the upper layer parameter phaseTrackingRS is set in the upper layer parameter dmrs-DownlinkForPDSCH-MappingTypeA or the upper layer parameter dmrs-DownlinkForPDSCH-MappingTypeB.

[0261] Terminal device 1 may report MCS and bandwidth thresholds. For example, MCS and bandwidth thresholds may be reported based on UE capability at a specific carrier frequency. For example, MCS and bandwidth thresholds may be reported in each subcarrier frequency of a data channel applied to a specific carrier frequency, assuming an MCS table with a maximum modulation order. MCS may be used to indicate at least part or all of a modulation mode and a target coding rate.

[0262] When the higher layer parameter phaseTrackingRS in the higher layer parameter DMRS-DownlinkConfig is set in the terminal device 1, part or all of Action 1, Action 2, Action 3, and Action 4 may be executed, instructed, assumed, or determined.

[0263] As action 1, the upper layer parameter timeDensity and the upper layer parameter frequencyDensity may indicate three MCS thresholds (threshold values) and two RB thresholds, respectively.

[0264] As action 2, when one or both of the upper layer parameters timeDensity and / or the upper layer parameters frequencyDensity are set, the terminal device 1 may assume the existence of a PTRS antenna port (PTRS port), and may also assume that the pattern is a function of the first MCS and the first bandwidth. As action 2, when the additional upper layer parameters timeDensity and / or the upper layer parameters frequencyDensity are set, and when the RNTI is MCS-C-RNTI, C-RNTI or CS-RNTI, the terminal device 1 may assume the existence of a PTRS antenna port (PTRS port) and the pattern is a function of the first MCS and the first bandwidth. The first MCS may be the MCS of the corresponding codeword. The first bandwidth may be the bandwidth in the corresponding BWP (bandwidth part). When the upper layer parameter timeDensity is not set, the terminal device 1 may assume L PTRS =1. PTRS It can be the number of OFDM symbols between two OFDM symbols where PTRS is mapped. For example, PTRS can exist in L PTRS In the case where the upper layer parameter frequencyDensity is not set, the terminal device may assume that K PTRS K is 2. PTRS It can be the number of PRBs between two PRBs that map PTRS. For example, PTRS can exist in K PTRS In one of the PRBs.

[0265] As action 3, when both the upper layer parameter timeDensity and the upper layer parameter frequencyDensity are not set, the terminal device 1 may assume that L PTRS is 1 and K PTRS As action 3, when both the additional upper layer parameter timeDensity and the upper layer parameter frequencyDensity are not set, and when RNTI is MCS-C-RNTI, C-RNTI or CS-RNTI, and when condition 1 is not satisfied, the terminal device 1 may assume that L PTRS is 1, and K PTRSis 2, assuming that PTRS exists. As action 3, when both the additional upper layer parameter timeDensity and the upper layer parameter frequencyDensity are not set, and when RNTI is MCS-C-RNTI, C-RNTI or CS-RNTI, and when condition 1 is satisfied, the terminal device 1 may assume that PTRS does not exist. Condition 1 may be that the value of MCS is less than 10. Condition 1 may also be that the value of MCS is less than 5. Condition 1 may also be that the value of MCS is less than 15. Condition 1 may also be that the value of MCS is less than 3. Condition 1 may also be that the number of PRBs (RBs) is less than 3.

[0266] As action 4, in a case where the RNTI is RA-RNTI, SI-RNTI, MSGB-RNTI, or P-RNTI, the terminal device 1 may assume that there is no PTRS.

[0267] The first MCS threshold, the second MCS threshold, and the third MCS threshold may be determined by upper layer parameters. When the MCS value is less than the first MCS threshold, PTRS may not exist. When the MCS value is greater than the first MCS threshold and less than the second MCS threshold, L PTRS It can be 4. When the MCS value is greater than the second MCS threshold and less than the third MCS threshold, L PTRS It can be 2. When the MCS value is at least greater than the third MCS threshold, L PTRS It may be 1. When the first MCS table is used, the upper layer parameters may provide the first MCS threshold, the second MCS threshold, and the third MCS threshold in the range of 0 to 29. When the second MCS table is used, the upper layer parameters may provide the first MCS threshold, the second MCS threshold, and the third MCS threshold in the range of 0 to 28. When the third MCS table is used, the upper layer parameters may provide the first MCS threshold, the second MCS threshold, and the third MCS threshold in the range of 0 to 27. The value of MCS may not exceed the fourth MCS threshold. It may be that when the first MCS table is used, the fourth MCS threshold is 29, when the second MCS table is used, the fourth MCS threshold is 28, and when the third MCS table is used, the fourth MCS threshold is 27.

[0268] The first RB threshold and the second RB threshold may be determined by upper layer parameters. When the number of RBs is less than the first RB threshold, PTRS may not exist. When the number of RBs is greater than the first RB threshold and less than the second RB threshold, K PTRS It can be 2. When the number of RBs is at least greater than the second RB threshold, K PTRSIt can be 4. The upper layer parameter can provide the first RB threshold and the second RB threshold in the range of 1 to 276.

[0269] When the upper layer parameter phaseTrackingRS is not set, the terminal device 1 may assume that there is no PTRS. PTRS ) and PTRS frequency density (K PTRS ) One or both of them may indicate that PTRS does not exist.

[0270] In L PTRS When L is 2 or 4, and when receiving a PDSCH with an allocation period of 2 OFDM symbols, it can be assumed that PTRS is not transmitted. PTRS When 4 is received and a PDSCH with an allocation period of 4 OFDM symbols is received, it can be assumed that PTRS is not transmitted.

[0271] The value of the MCS determined by the time density of the PTRS can be obtained from the DCI. For example, in the case where the terminal device 1 is scheduled by an MCS index (MCS value) greater than the first value, and in the case of receiving a PDSCH for retransmission, the time density (L) for the PTRS is PTRS ) The value of the MCS determined can be obtained from the DCI received for the same transmission in the initial transmission. It can be that when the first MCS table is used, the first value is 28, when the second MCS table is used, the first value is 27, and when the third MCS table is used, the first value is 26.

[0272] One or more DMRS ports can be associated with a PTRS port. It can be assumed that one or more DMRS ports associated with a PTRS port are QCLs (or QCLs of type A and type D). In the case where the terminal device 1 is scheduled by a codeword, the PTRS antenna port (PTRS port, antenna port for PTRS, antenna port associated with PTRS) can be associated with one of the one or more DMRS antenna ports (DMRS port, antenna port for DMRS) allocated to the PDSCH. A DMRS antenna port can be a DMRS antenna port to which the lowest index is attached. The DMRS port can be a DMRS port for the downlink. The PTRS port can be a PTRS antenna port. The PTRS port can also be an antenna port for PTRS. The DMRS port can also be a DMRS antenna port. The DMRS port can also be an antenna port for DMRS.

[0273] In the case where the terminal device 1 is scheduled by two codewords, the PTRS antenna port can be associated with one DMRS antenna port. One DMRS antenna port can be the DMRS antenna port with the lowest index attached among one or more DMRS antenna ports assigned to the codeword with the highest MCS. In the case where the two codewords are the same MCS (MCS index), one DMRS antenna port can be the DMRS antenna port with the lowest index attached among one or more DMRS antenna ports assigned to codeword 0.

[0274] DCI format 1_0, DCI format 1_1, and DCI format 1_2 may be DCI formats used for scheduling of a PDSCH. DCI format 1_0 may be used for scheduling of a PDSCH in one downlink cell.

[0275] The antenna port field (Antenna port(s) field) may be included in DCI format 1_1 and DCI format 1_2. The number of information bits constituting the antenna port field may be 4, 5, or 6 bits. In addition, the number of information bits constituting the antenna port field may also be 4, 5, 6, or 7 bits. In addition, the number of information bits constituting the antenna port field may also be 4, 5, 6, 7, or 8 bits. The number of CDM groups with no data may be any one of a value 1, a value 2, and a value 3. The number of CDM groups with no data of value 1 may refer to CDM group 0. The number of CDM groups with no data of value 2 may refer to CDM groups {0, 1}. The number of CDM groups with no data of value 3 may refer to CDM groups {0, 1, 2}.

[0276] The upper layer parameter dmrs-Type being 1 may be used to set DMRS setting type 1. The upper layer parameter dmrs-Type being 2 may be used to set DMRS setting type 2. The upper layer parameter maxLength being 1 may be used to set the maximum number of front DMRS symbols to one symbol. The upper layer parameter maxLength being 2 may be used to set the maximum number of front DMRS symbols to two symbols. For example, the upper layer parameter maxLength being 1 may be used to set a single-symbol front DMRS (front DMRS symbol). For example, the upper layer parameter maxLength being 2 may be used to set a single-symbol front DMRS (front DMRS symbol) or a double-symbol front DMRS.

[0277] In the case where DMRS setting type 1 and a single-symbol front DMRS symbol are set, the number of information bits constituting the antenna port field may be 4. In the case where DMRS setting type 1 and a single-symbol front DMRS symbol are set, and in the case where the upper layer parameter ExtendedDMRSports is not set, the number of information bits constituting the antenna port field may be 4. In the case where DMRS setting type 1 and a single-symbol front DMRS symbol are set, and in the case where the upper layer parameter ExtendedDMRSports is set to invalid, the number of information bits constituting the antenna port field may be 4. In the case where the value of the antenna port field composed of four information bits is 0, the DMRS port may be 0, and the number of CDM groups without data may be 1. In the case where the value of the antenna port field composed of four information bits is 1, the DMRS port may be 1, and the number of CDM groups without data may be 1. In the case where the value of the antenna port field composed of four information bits is 2, the DMRS port may be {0,1}, and the number of CDM groups without data may be 1. In the case where the value of the antenna port field composed of four information bits is 3, the DMRS port may be 0, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of four information bits is 4, the DMRS port may be 1, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of four information bits is 5, the DMRS port may be 2, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of four information bits is 6, the DMRS port may be 3, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of four information bits is 7, the DMRS port may be {0,1}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of four information bits is 8, the DMRS port may be {2,3}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of four information bits is 9, the DMRS port may be {0,1,2}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of four information bits is 10, the DMRS port may be {0,1,2,3}, and the number of CDM groups without data may be 2. When the value of the antenna port field consisting of four information bits is 11, the DMRS port can be {0,2}, and the number of CDM groups without data can be 2. When the value of the antenna port field consisting of four information bits is 12, 13, 14 or 15, the DMRS port can be undefined (reserved), and the number of CDM groups without data can also be undefined (reserved).

[0278] In the case where DMRS setting type 1 and a single-symbol front DMRS symbol are set, and in the case where the upper layer parameter ExtendedDMRSports is set, the number of information bits constituting the antenna port field may be 5. In the case where DMRS setting type 1 and a single-symbol front DMRS symbol are set, and in the case where the upper layer parameter ExtendedDMRSports is set to be valid, the number of information bits constituting the antenna port field may be 5. In the case where the value of the antenna port field composed of five information bits is 0, the DMRS port may be 0, and the number of CDM groups without data may be 1. In the case where the value of the antenna port field composed of five information bits is 1, the DMRS port may be 1, and the number of CDM groups without data may be 1. In the case where the value of the antenna port field composed of five information bits is 2, the DMRS port may be {0,1}, and the number of CDM groups without data may be 1. In the case where the value of the antenna port field composed of five information bits is 3, the DMRS port may be 0, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 4, the DMRS port may be 1, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 5, the DMRS port may be 2, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 6, the DMRS port may be 3, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 7, the DMRS port may be {0,1}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 8, the DMRS port may be {2,3}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 9, the DMRS port may be {0,1,2}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 10, the DMRS port may be {0,1,2,3}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 11, the DMRS port may be {0,2}, and the number of CDM groups without data may be 2. When the value of the antenna port field consisting of five information bits is 12, the DMRS port may be 8 and the number of CDM groups without data may be 2. When the value of the antenna port field consisting of five information bits is 13, the DMRS port may be 9 and the number of CDM groups without data may be 2.In the case where the value of the antenna port field composed of five information bits is 14, the DMRS port may be 10, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 15, the DMRS port may be 11, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 16, the DMRS port may be {8,9}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 17, the DMRS port may be {10,11}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 18, the DMRS port may be {8,9,10}, and the number of CDM groups without data may be 2. In the case where the value of the antenna port field composed of five information bits is 19, the DMRS port may be {8,9,10,11}, and the number of CDM groups without data may be 2. In case a value of the antenna port field consisting of five information bits indicates a part or all of the DMRS ports {8, 9, 10, 11}, the number of CDM groups without data may be 2.

[0279] In the case where DMRS setting type 1 is set and the maximum number of forward DMRS symbols is set to 2, the number of information bits constituting the antenna port field may be 5. In the case where DMRS setting type 1 is set and the maximum number of forward DMRS symbols is set to 2, and the upper layer parameter ExtendedDMRSports is not set, the number of information bits constituting the antenna port field may be 5. In the case where DMRS setting type 1 is set and the maximum number of forward DMRS symbols is set to 2, and the upper layer parameter ExtendedDMRSports is set to invalid, the number of information bits constituting the antenna port field may be 5. The antenna port field consisting of five information bits can indicate part or all of the DMRS ports {0,1,2,3,4,5,6,7}.

[0280] In the case where DMRS setting type 1 is set and the maximum number of forward DMRS symbols is set to 2, the number of information bits constituting the antenna port field may be 5. In the case where DMRS setting type 1 is set and the maximum number of forward DMRS symbols is set to 2, and the upper layer parameter ExtendedDMRSports is not set, the number of information bits constituting the antenna port field may be 5. In the case where DMRS setting type 1 is set and the maximum number of forward DMRS symbols is set to 2, and the upper layer parameter ExtendedDMRSports is set to invalid, the number of information bits constituting the antenna port field may be 5. The antenna port field consisting of five information bits can indicate part or all of the DMRS ports {0,1,2,3,4,5,6,7}.

[0281] In the case where DMRS setting type 1 is set and the maximum number of the front DMRS symbols is set to 2, and in the case where the upper layer parameter ExtendedDMRSports is set, the number of information bits constituting the antenna port field may be 6. In the case where DMRS setting type 1 is set and the maximum number of the front DMRS symbols is set to 2, and in the case where the upper layer parameter ExtendedDMRSports is set to be valid, the number of information bits constituting the antenna port field may be 6. The antenna port field consisting of six information bits may indicate a part or all of the DMRS ports {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}. In the case where the value of the antenna port field consisting of six information bits indicates a part or all of the DMRS ports {8,9,10,11,12,13,14,15}, the number of CDM groups without data may be 2.

[0282] In the case of DMRS setting type 1, the antenna port (DMRS port) available by applying DMRS extension may correspond to the number of CDM groups without data being 2. In the case of DMRS setting type 1, the antenna port (DMRS port) available by applying DMRS extension may not correspond to the number of CDM groups without data being 1.

[0283] In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 1, the number of information bits constituting the antenna port field may be 5. In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 1, and the upper layer parameter ExtendedDMRSports is not set, the number of information bits constituting the antenna port field may be 5. In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 1, and the upper layer parameter ExtendedDMRSports is set to invalid, the number of information bits constituting the antenna port field may be 5. The antenna port field consisting of five information bits can indicate part or all of the DMRS ports {0,1,2,3,4,5}.

[0284] In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 1, and in the case where the upper layer parameter ExtendedDMRSports is set, the number of information bits constituting the antenna port field may be 6. In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 1, and in the case where the upper layer parameter ExtendedDMRSports is set to valid, the number of information bits constituting the antenna port field may be 6. The antenna port field consisting of six information bits may indicate a part or all of the DMRS ports {0,1,2,3,4,5,12,13,14,15,16,17}. In the case where the value of the antenna port field consisting of six information bits indicates a part or all of the DMRS ports {12,13,14,15,16,17}, the number of CDM groups without data may be one or both of 2 and 3, or may not be 1.

[0285] In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 2, the number of information bits constituting the antenna port field may be 6. In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 2, and the upper layer parameter ExtendedDMRSports is not set, the number of information bits constituting the antenna port field may be 6. In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 2, and the upper layer parameter ExtendedDMRSports is set to invalid, the number of information bits constituting the antenna port field may be 6. The antenna port field consisting of six information bits can indicate part or all of the DMRS ports {0,1,2,3,4,5,6,7,8,9,10,11}.

[0286] In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 2, and in the case where the upper layer parameter ExtendedDMRSports is set, the number of information bits constituting the antenna port field may be 7. In the case where DMRS setting type 2 is set and the maximum number of forward DMRS symbols is set to 2, and in the case where the upper layer parameter ExtendedDMRSports is set to be valid, the number of information bits constituting the antenna port field may be 7. The antenna port field consisting of seven information bits may indicate a part or all of the 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}. When the value of the antenna port field consisting of seven information bits indicates part or all of the DMRS ports {12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23}, the number of CDM groups without data may be one or both of 2 and 3, or may not be 1.

[0287] In the case of DMRS setting type 2, the antenna port (DMRS port) available by applying DMRS extension may correspond to the number of CDM groups with no data being 3. In the case of DMRS setting type 1, the antenna port (DMRS port) available by applying DMRS extension may not correspond to the number of CDM groups with no data being 1. In the case of DMRS setting type 1, the antenna port (DMRS port) available by applying DMRS extension may not correspond to the number of CDM groups with no data being 2.

[0288] When the DMRS setting type 1 and the maximum number of the front DMRS symbols are set to 1, and when the upper layer parameter ExtendedDMRSports is set, the number of information bits constituting the antenna port field may be 6. When the DMRS setting type 1 and the maximum number of the front DMRS symbols are set to 1, and when the upper layer parameter ExtendedDMRSports is set to valid, the number of information bits constituting the antenna port field may be 6. The first part of the antenna port field consisting of six information bits may be used to indicate the DMRS port, and the second part of the antenna port field consisting of six information bits may be used for DMRS reception assistance.

[0289] In the case where DMRS setting type 1 is set and the maximum number of the front DMRS symbols is set to 2, and in the case where the upper layer parameter ExtendedDMRSports is set, the number of information bits constituting the antenna port field may be 7. In the case where DMRS setting type 1 is set and the maximum number of the front DMRS symbols is set to 2, and in the case where the upper layer parameter ExtendedDMRSports is set to be valid, the number of information bits constituting the antenna port field may be 7. The antenna port field consisting of seven information bits may indicate a part or all of the DMRS ports {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}. In the case where the value of the antenna port field consisting of seven information bits indicates a part or all of the DMRS ports {8,9,10,11,12,13,14,15}, the number of CDM groups without data may be 2. The first part of the antenna port field consisting of seven information bits may be used to indicate the DMRS port, and the second part of the antenna port field consisting of seven information bits may be used for DMRS reception assistance.

[0290] In the case where DMRS setting type 2 is set and the maximum number of front DMRS symbols is set to 1, and in the case where the upper layer parameter ExtendedDMRSports is set, the number of information bits constituting the antenna port field may be 7. In the case where DMRS setting type 2 is set and the maximum number of front DMRS symbols is set to 1, and in the case where the upper layer parameter ExtendedDMRSports is set to be valid, the number of information bits constituting the antenna port field may be 7. The antenna port field consisting of seven information bits may indicate a part or all of the DMRS ports {0,1,2,3,4,5,12,13,14,15,16,17}. In the case where the value of the antenna port field consisting of seven information bits indicates a part or all of the DMRS ports {12,13,14,15,16,17}, the number of CDM groups without data may be 2. The first part of the antenna port field consisting of seven information bits may be used to indicate the DMRS port, and the second part of the antenna port field consisting of seven information bits may be used for DMRS reception assistance.

[0291] In the case where DMRS setting type 2 is set and the maximum number of the front DMRS symbols is set to 2, and in the case where the upper layer parameter ExtendedDMRSports is set, the number of information bits constituting the antenna port field may be 8. In the case where DMRS setting type 2 is set and the maximum number of the front DMRS symbols is set to 2, and in the case where the upper layer parameter ExtendedDMRSports is set to be valid, the number of information bits constituting the antenna port field may be 8. The antenna port field consisting of eight information bits may indicate a part or all of the 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}. In the case where the value of the antenna port field consisting of eight information bits indicates a part or all of the DMRS ports {12,13,14,15,16,17,18,19,20,21,22,23}, the number of CDM groups without data may be 2. The first part of the antenna port field consisting of eight information bits may be used to indicate a DMRS port, and the second part of the antenna port field consisting of seven information bits may be used for DMRS reception assistance.

[0292] The number of DMRS ports can be the number of layers v. Antenna ports {p0...p v-1}(value of antenna port, antenna port number) may be the sum of DMRS port (value of DMRS port, DMRS port number) and 1000. For example, DMRS port 0 may correspond to antenna port p0=1000. For example, DMRS port 1 may correspond to antenna port p1=1001. For example, DMRS ports {0,1} may correspond to antenna ports {p0=1000,p1=1001}. For example, DMRS ports {2,3} may correspond to antenna ports {p2=1002,p3=1003}.

[0293] The DMRS for the PDSCH may be determined based on a sequence of DMRS (DMRS sequence) and a mapping to physical resources. A sequence of DMRS for the PDSCH may be generated. A sequence of DMRS r(n) may be determined based at least on a pseudo-random sequence c(i) (pseudo-random sequence). The pseudo-random sequence generator may be based at least on an OFDM symbol number l within a time slot, a time slot number (time slot index) n within a frame, and a pseudo-random sequence n. μ s,f 、N nn ID and nn = n λ SCID Initialize part or all of. When nn=0, N 0ID It can be given by the upper layer parameter scraplingID0. When nn = 1, N 1 ID It can be given by the upper layer parameter ID1. nn ID Can be cell ID N cell ID (Physical layer cell identity: physical layer cell identity) When the upper layer parameter dmrs-Downlink or the upper layer parameter dmrs-Uplink is provided, and when λ=0, n 0 SCID Can be n SCID When the upper layer parameter dmrs-Downlink or the upper layer parameter dmrs-Uplink is provided, and when λ=2, n 2 SCID Can be n SCID In the case where the upper layer parameter dmrs-Downlink or the upper layer parameter dmrs-Uplink is provided, and when λ=1, n 1 SCID Can be 1-n SCID λ may be a CDM group. In the case where the upper layer parameter dmrs-Downlink or the upper layer parameter dmrs-Uplink is not provided, n λ SCID Can be n SCID If the upper layer parameter dmrs-Downlink or the upper layer parameter dmrs-Uplink is not provided, λ may be 0. SCID Can be 0 or 1. SCID It can be given by the DMRS sequence initialization field in the DCI. In the absence of the DMRS sequence initialization field in the DCI, n SCID Can be 0.

[0294] The DMRS for PDSCH (PDSCH-DMRS) (PDSCH-DMRS) can be mapped to physical resources according to the DMRS setting type. The DMRS setting type can be DMRS setting type 1 (setting type 1) or DMRS setting type 2 (setting type 2). The sequence r(m) of DMRS can be mapped to one or more resource elements (k, l) p,μ (or a (p,μ) (k,l) ). The DMRS sequence r(m) can also be mapped to a set of resource elements (k, l) p,μThe DMRS sequence r(m) can be obtained by factor β DMRS PDSCH One or more resource elements (k, l) may be determined based on a subcarrier index (subcarrier) k, an OFDM symbol index (OFDM symbol) l, an antenna port p, and a subcarrier spacing setting (subcarrier spacing) μ. p,μ .

[0295] The reference point of subcarrier index k may be the subcarrier of index 0 in common resource block 0 of index 0. The reference point of subcarrier index k may also be the subcarrier of index 0 of the lowest-numbered resource block in CORESET0.

[0296] In PDSCH mapping type A, the reference point of OFDM symbol index 1 may be determined in association with the start of a time slot. In PDSCH mapping type B, the reference point of OFDM symbol index 1 may be determined in association with the start of a scheduled PDSCH resource. In the case of PDSCH mapping type A, and when the upper layer parameter dmrs-TypeA-Position is 'pos3', the position l0 of the starting DMRS symbol may be 3. In the case of PDSCH mapping type A, and when the upper layer parameter dmrs-TypeA-Position is 'pos2', the position l0 of the starting DMRS symbol may be 2. In PDSCH mapping type B, the position l0 of the starting DMRS symbol may be 0.

[0297] The DMRS sequence r(n) can be mapped to the physical resource a (p,μ) (k,l) The DMRS sequence r(n) can also be mapped to the physical resource a based on formula 1 (p,μ) (k,l) . [Formula 1]

[0298] k' may be {0,1}. k' may be determined based on DMRS reception assistance. For example, in the case where the information bit in the DCI format for DMRS reception assistance does not indicate a specific value, k' may be {0,1}. In addition, in the case where the information bit in the DCI format for DMRS reception assistance indicates a specific value, k' may be {0,1,2,3}. For example, in the case where the upper layer parameter ExtendedDMRSports is not set, k' may be {0,1}. In the case where the upper layer parameter ExtendedDMRSports is set, k' may be {0,1,2,3}. For example, in the case where the upper layer parameter ExtendedDMRSports is set, and in the case where DMRS reception assistance is applied, k' may be {0,1,2,3}. For example, in the case where the upper layer parameter ExtendedDMRSports is set, and in the case where 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 the 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 also be called a frequency domain-orthogonal cover code index (FD-OCC index). k' may be {0,1} and the length of the FD-OCC may be 2. k' may be {0,1,2,3} and the length of the FD-OCC may be 4.

[0299] When k' is {0,1} in DMRS setting type 1, k' may be {0,1} in DMRS setting type 2. When k' is {0,1,2,3} in DMRS setting type 1, k' may be {0,1,2,3} in DMRS setting type 2.

[0300] The OFDM symbol index l can be l bar +l'.

[0301] In PDSCH mapping type A, 1d may be the period between the starting OFDM symbol of the slot and the last OFDM symbol of the scheduled PDSCH resource in the slot. In PDSCH mapping type B, 1d may be the period of the scheduled PDSCH resource.

[0302] DMRS location bar It may be the DMRS position l for a single-symbol DMRS (a single-symbol front DMRS). bar The DMRS position l can be determined based at least on the period ld barFor example, the DMRS position l can be determined based on at least the period ld, the PDSCH mapping type, and the additional DMRS. bar For example, when the period ld is 2 OFDM symbols, the DMRS position l bar For example, when the period ld is any one of 3 to 7 OFDM symbols and PDSCH mapping type A is set, l bar For example, when the period ld is any one of 2 to 4 OFDM symbols and PDSCH mapping type B is set, l bar For example, when ld is 14 OFDM symbols, and PDSCH mapping type A is set, and 'pos0' is set for dmrs-AdditionalPosition, DMRS position l bar For example, when ld is 14 OFDM symbols, and PDSCH mapping type A is set, and 'pos1' is set for dmrs-AdditionalPosition, DMRS position l bar For example, when ld is 14 OFDM symbols, and PDSCH mapping type A is set, and 'pos2' is set for dmrs-AdditionalPosition, DMRS position l bar For example, when ld is 14 OFDM symbols, and PDSCH mapping type A is set, and dmrs-AdditionalPosition is set to 'pos3', DMRS position l bar It can be {l0,5,8,11}. For example, when ld is 13 OFDM symbols, and PDSCH mapping type B is set, and dmrs-AdditionalPosition is set to 'pos0', DMRS position l bar For example, when ld is 13 OFDM symbols, and PDSCH mapping type B is set, and 'pos1' is set for dmrs-AdditionalPosition, DMRS position l bar For example, when ld is 13 OFDM symbols, and PDSCH mapping type B is set, and dmrs-AdditionalPosition is set to 'pos2', DMRS position lbar For example, when ld is 13 OFDM symbols, and PDSCH mapping type B is set, and dmrs-AdditionalPosition is set to 'pos3', DMRS position l bar It can be {l0,3,6,9}. Setting a certain value for dmrs-AdditionalPosition can be that dmrs-AdditionalPosition is equal to a certain value.

[0303] DMRS location bar It can be the DMRS position l for double symbol DMRS (single symbol front DMRS) bar For example, when the period ld is any one of 5 to 7 OFDM symbols, l bar For example, when the period ld is 14 OFDM symbols, and PDSCH mapping type A is set, and 'pos0' is set for dmrs-AdditionalPosition, l bar For example, when the period ld is 14 OFDM symbols, and when PDSCH mapping type A is set, and when dmrs-AdditionalPosition is set to 'pos1', l bar It can be {l0,10}. When the period ld is 13 OFDM symbols, and when PDSCH mapping type B is set, and when dmrs-AdditionalPosition is set to 'pos0', l bar It can be l0. When the period ld is 13 OFDM symbols, and when PDSCH mapping type B is set, and when dmrs-AdditionalPosition is set to 'pos1', l bar It can be {l0,8}.

[0304] When the upper layer parameter dmrs-TypeA-Position is equal to 'pos2', the upper layer parameter dmrs-AdditionalPosition is equal to 'pos3'. d It can be 3 or 4 OFDM symbols.

[0305] In case of PDSCH mapping type A, l1 may be 11 or 12. In case of PDSCH mapping type A, and if the condition is met, l1 may be 12. In case of PDSCH mapping type A, and if the condition is not met, l1 may be 11.

[0306] l' may be 0 or {0,1}. For example, in the case of a single-symbol front DMRS, and in the case of DMRS setting type 1, and in the case of supported antenna ports of 1000 to 1003, l' may be 0. For example, in the case of a single-symbol front DMRS, and in the case of DMRS setting type 2, and in the case of supported antenna ports of 1000 to 1005, l' may be 0. For example, in the case of a double-symbol front DMRS, and in the case of DMRS setting type 1, and in the case of supported antenna ports of 1000 to 1007, l' may be {0,1}. For example, in the case of a double-symbol front DMRS, and in the case of DMRS setting type 2, and in the case of supported antenna ports of 1000 to 1011, l' may be {0,1}. For example, in the case of a double-symbol front DMRS, and in the case of DMRS setting type 1, and in the case of supported antenna ports of 1000 to 1015, l' may be {0,1}. For example, in the case of a dual-symbol front DMRS, in the case of DMRS setting type 2, and in the case of supported antenna ports of 1000 to 1023, l' may be {0, 1}.

[0307] In case of DMRS setting type 1, the subcarrier index k may be 4n+2k'+Δ. In case of DMRS setting type 2, the subcarrier index k may be 6n+k'+Δ.

[0308] At least determine Δ, w t (l'), w f In the case of part or all of (k') and λ, antenna port 1000+i can be the same as DMRS port i. In the case of DMRS setting type 1, and when DMRS extension is not set, i can be an integer from 0 to 7. In the case of DMRS setting type 1, and when DMRS extension is set, i can be an integer from 0 to 15. In the case of DMRS setting type 2, and when DMRS extension is not set, i can be an integer from 0 to 11. In the case of DMRS setting type 2, and when DMRS extension is set, i can be an integer from 0 to 23.

[0309] Δ may be determined based on at least the antenna port. Δ may also be determined based on at least the antenna port and the DMRS setting type. Δ may also be determined based on at least the antenna port, the DMRS setting type, and whether DMRS extension is applied. For example, in the case of DMRS setting type 1, and in the case where the antenna port is any one of {1000, 1001, 1004, 1005}, Δ may be 0. For example, in the case of DMRS setting type 1, and in the case where the antenna port is any one of {1002, 1003, 1006, 1007}, Δ may be 1. For example, in the case of DMRS setting type 1, and in the case where the antenna port is any one of {1000, 1001, 1004, 1005, 1008, 1009, 1012, 1013}, Δ may be 0. For example, in the case of DMRS setting type 1, and in the case where the antenna port is any one of {1002, 1003, 1006, 1007, 1010, 1011, 1014, 1015}, Δ may be 1. For example, in the case of DMRS setting type 1, and in the case where DMRS extension is not applied, and in the case where the antenna port is any one of {1000, 1001, 1004, 1005}, Δ may be 0. For example, in the case of DMRS setting type 1, and in the case where DMRS extension is not applied, and in the case where the antenna port is any one of {1002, 1003, 1006, 1007}, Δ may be 1. For example, in the case of DMRS setting type 1, and in the case where DMRS extension is applied, and in the case where the antenna port is any one of {1000, 1001, 1004, 1005, 1008, 1009, 1012, 1013}, Δ may be 0. For example, in the case of DMRS setting type 1, and in the case of applying DMRS extension, and in the case where the antenna port is any one of {1002, 1003, 1006, 1007, 1010, 1011, 1014, 1015}, Δ may be 1. In the case where Δ is 0, the CDM group λ may be 0. In the case where Δ is 1, the CDM group λ may be 1.

[0310] In the case of DMRS setting type 2, and in the case where the antenna port is any one of {1000, 1001, 1006, 1007}, Δ may be 0. For example, in the case of DMRS setting type 2, and in the case where the antenna port is any one of {1002, 1003, 1008, 1009}, Δ may be 2. For example, in the case of DMRS setting type 2, and in the case where the antenna port is any one of {1004, 1005, 1010, 1011}, Δ may be 4. In the case of DMRS setting type 2, and in the case where the antenna port is any one of {1000, 1001, 1006, 1007, 1012, 1013, 1018, 1019}, Δ may be 0. For example, in the case of DMRS setting type 2, and in the case where the antenna port is any one of {1002, 1003, 1008, 1009, 1014, 1015, 1020, 1021}, Δ may be 2. For example, in the case of DMRS setting type 2, and in the case where the antenna port is any one of {1004, 1005, 1010, 1011, 1016, 1017, 1022, 1023}, Δ may be 4. In the case of DMRS setting type 2, and in the case where DMRS extension is not applied, and in the case where the antenna port is any one of {1000, 1001, 1006, 1007}, Δ may be 0. For example, in the case of DMRS setting type 2, and in the case where DMRS extension is not applied, and in the case where the antenna port is any one of {1002, 1003, 1008, 1009}, Δ may be 2. For example, in the case of DMRS setting type 2, and in the case of not applying DMRS extension, and in the case of the antenna port being any one of {1004, 1005, 1010, 1011}, Δ may be 4. In the case of DMRS setting type 2, and in the case of applying DMRS extension, and in the case of the antenna port being any one of {1000, 1001, 1006, 1007, 1012, 1013, 1018, 1019}, Δ may be 0. For example, in the case of DMRS setting type 2, and in the case of applying DMRS extension, and in the case of the antenna port being any one of {1002, 1003, 1008, 1009, 1014, 1015, 1020, 1021}, Δ may be 2. For example, in the case of DMRS setting type 2, and in the case of applying DMRS extension, and in the case where the antenna port is any one of {1004, 1005, 1010, 1011, 1016, 1017, 1022, 1023}, Δ may be 4. In the case where Δ is 0, the CDM group λ may be 0. In the case where Δ is 2, the CDM group λ may be 1.When Δ is 4, the number of CDM groups λ can be 2.

[0311] w may be determined based on one or both of the antenna port and the DMRS setting type. t (l'). w may also be determined based on at least the antenna port, the DMRS setting type, and whether DMRS extension is applied. t (l'). In the case of DMRS setting type 1, w t (0) may be +1. In the case of DMRS setting type 1, and in the case where the antenna port is any one of {1000, 1001, 1002, 1003}, w t (1) can be +1. In the case of DMRS setting type 1, and in the case where the antenna port is any one of {1004, 1005, 1006, 1007}, w t (1) can be -1. In the case of DMRS setting type 1, and in the case where the antenna port is any one of {1008, 1009, 1010, 1011}, w t (1) can be +1. In the case of DMRS setting type 1, and in the case where the antenna port is any one of {1012, 1013, 1014, 1015}, w t (1) can be -1. In the case of DMRS setting type 1, and in the case of applying DMRS extension, and in the case of the antenna port being any one of {1008, 1009, 1010, 1011}, w t (1) may be +1. In the case of DMRS setting type 1, and in the case of applying DMRS extension, and in the case of the antenna port being any one of {1012, 1013, 1014, 1015}, w t (1) can be -1.

[0312] In case of DMRS setting type 2, w t (0) may be +1. In the case of DMRS setting type 2, and in the case where the antenna port is any one of {1000, 1001, 1002, 1003, 1004, 1005}, w t (1) can be +1. In the case of DMRS setting type 2, and in the case where the antenna port is any one of {1006, 1007, 1008, 1009, 1010, 1011}, w t (1) can be -1. In the case of DMRS setting type 2, and in the case where the antenna port is any one of {1012, 1013, 1014, 1015, 1016, 1017}, w t(1) can be +1. In the case of DMRS setting type 2, and in the case where the antenna port is any one of {1018, 1019, 1020, 1021, 1022, 1023}, w t (1) can be -1. In the case of DMRS setting type 2, and in the case of applying DMRS extension, and in the case where the antenna port is any one of {1012, 1013, 1014, 1015, 1016, 1017}, w t (1) may be +1. In the case of DMRS setting type 2, and in the case of applying DMRS extension, and in the case of the antenna port being any one of {1018, 1019, 1020, 1021, 1022, 1023}, w t (1) can be -1.

[0313] w may be determined based on one or both of the antenna port and the DMRS setting type. f (k'). w may also be determined based on the antenna port, DMRS setting type, whether DMRS extension is applied, and part or all of the DCI format. f (k'). w may also be determined based on part or all of the antenna port, DMRS setting type, whether DMRS extension is applied, and whether DMRS reception assistance is indicated. f (k'). In the case of DMRS setting type 1, w f (0) may be +1. In the case of DMRS setting type 1, and in the case where the antenna port is any one of {1000, 1002, 1004, 1006, 1008, 1010, 1012, 1014}, w f (1) can be +1. In the case of DMRS setting type 1, and in the case where the antenna port is any one of {1001, 1003, 1005, 1007, 1009, 1011, 1013, 1015}, w f (1) can be -1. In the case of DMRS setting type 1, and in the case of applying DMRS extension, and in the case where the antenna port is any one of {1000, 1002, 1004, 1006, 1008, 1010, 1012, 1014}, w f (1) may be +1. In the case of DMRS setting type 1, and in the case of applying DMRS extension, and in the case where the antenna port is any one of {1001, 1003, 1005, 1007, 1009, 1011, 1013, 1015}, w f (1) can be -1.

[0314] In the case of setting type 1 for DMRS, w f (2) can be -1. In the case of setting type 1 for DMRS and applying DMRS extension, w f (2) may be -1. In the case of setting type 1 for DMRS, in the case of applying DMRS extension, and in the case of indicating DMRS reception assistance, w f (2) may be -1. In the case where type 1 is set for DMRS, and in the case where DMRS extension is applied, and in the case where DMRS reception assistance is not indicated, w f (2) can be -1, or w can be omitted f (2) When type 1 is set for DMRS and the antenna ports are {1008, 1010, 1012, 1014}, w f (3) can be -1. When type 1 is set for DMRS and the antenna ports are {1009, 1011, 1013, 1015}, w f (3) may be +1. In the case where type 1 is set for DMRS, and in the case where DMRS extension is applied, and in the case where the antenna ports are {1008, 1010, 1012, 1014}, w f (3) can be -1. In the case of setting type 1 for DMRS, and in the case of applying DMRS extension, and in the case of antenna ports {1009, 1011, 1013, 1015}, w f (3) may be +1. In the case where type 1 is set for DMRS, and in the case where DMRS extension is applied, and in the case where the antenna ports are {1008, 1010, 1012, 1014}, and in the case where DMRS reception assistance is indicated, w f (3) may be -1. In the case of setting type 1 for DMRS, and in the case of applying DMRS extension, and in the case of the antenna ports being {1009, 1011, 1013, 1015}, and in the case of indicating DMRS reception assistance, w f (3) may be +1. In the case where type 1 is set for DMRS, and in the case where DMRS extension is applied, and in the case where the antenna ports are {1008, 1010, 1012, 1014}, and in the case where DMRS reception assistance is not indicated, w f (3) can be -1, or w can be omitted f(3) In the case where type 1 is set for DMRS, and in the case where DMRS extension is applied, and in the case where the antenna ports are {1009, 1011, 1013, 1015}, and in the case where DMRS reception assistance is not indicated, w f (3) It can be +1 or not use w f (3).

[0315] In case of DMRS setting type 2, w f (0) may be +1. In the case of DMRS setting type 2, and in the case where the antenna port is any one of {1000, 1002, 1004, 1006, 1008, 1010, 1012, 1014, 1016, 1018, 1020, 1022}, w f (1) may be +1. In the case of DMRS setting type 2, and in the case where the antenna port is any one of {1001, 1003, 1005, 1007, 1009, 1011, 1013, 1015, 1017, 1019, 1021, 1023}, w f (1) may be -1. In the case of DMRS setting type 2, and in the case of applying DMRS extension, and in the case where the antenna port is any one of {1000, 1002, 1004, 1006, 1008, 1010, 1012, 1014, 1016, 1018, 1020, 1022}, w f (1) may be +1. In the case of DMRS setting type 2, and in the case of applying DMRS extension, and in the case where the antenna port is any one of {1001, 1003, 1005, 1007, 1009, 1011, 1013, 1015, 1017, 1019, 1021, 1023}, w f (1) can be -1.

[0316] In the case of setting type 2 for DMRS, w f (2) can be -1. In the case of setting type 2 for DMRS and applying DMRS extension, w f (2) may be -1. In the case of setting type 2 for DMRS, in the case of applying DMRS extension, and in the case of indicating DMRS reception assistance, w f (2) may be -1. In the case of setting type 2 for DMRS, in the case of applying DMRS extension, and in the case of not indicating DMRS reception assistance, w f (2) can be -1, or w can be omitted f(2) When type 2 is set for DMRS and the antenna ports are {1012, 1014, 1016, 1018, 1020, 1022}, w f (3) can be -1. In the case of setting type 2 for DMRS, and in the case of antenna ports {1013, 1015, 1017, 1019, 1021, 1023}, w f (3) may be +1. In the case of setting type 2 for DMRS, and in the case of applying DMRS extension, and in the case of antenna ports {1012, 1014, 1016, 1018, 1020, 1022}, w f (3) can be -1. In the case of setting type 2 for DMRS, and in the case of applying DMRS extension, and in the case of antenna ports {1013, 1015, 1017, 1019, 1021, 1023}, w f (3) may be +1. In the case of setting type 2 for DMRS, and in the case of applying DMRS extension, and in the case of the antenna ports being {1012, 1014, 1016, 1018, 1020, 1022}, and in the case of indicating DMRS reception assistance, w f (3) may be -1. In the case of setting type 2 for DMRS, and in the case of applying DMRS extension, and in the case of the antenna ports being {1013, 1015, 1017, 1019, 1021, 1023}, and in the case of indicating DMRS reception assistance, w f (3) may be +1. In the case of setting type 2 for DMRS, and in the case of applying DMRS extension, and in the case of the antenna ports being {1012, 1014, 1016, 1018, 1020, 1022}, and in the case of not indicating DMRS reception assistance, w f (3) can be -1, or w can be omitted f (3) In the case where type 2 is set for DMRS, and in the case where DMRS extension is applied, and in the case where the antenna ports are {1013, 1015, 1017, 1019, 1021, 1023}, and in the case where DMRS reception assistance is not indicated, w f (3) It can be +1 or not use w f (3).

[0317] The PTRS (Phase tracking reference signal) for PDSCH can be determined based on the sequence of PTRS (PTRS sequence) and the mapping to physical resources. A sequence (PTRS sequence) corresponding to the PTRS for PDSCH can be generated. The mapping of the sequence to the physical resource can be the mapping of the sequence to one or more resource elements. The sequence r(n) of the PTRS can be the same as the sequence of the DMRS. For example, the sequence r(n) of the PTRS k =r(2m+k') may be the DMRS (DMRS sequence) at symbol position 10 and subcarrier index k.

[0318] PTRS may exist in the resource blocks used for PDSCH. Terminal device 1 may assume that PTRS To scale the PTRS (PDSCH-PTRS) to match the transmit power. Terminal device 1 may assume that PTRS is mapped to one or more resource elements (k, l) p,μ PTRS sequence k can be mapped to one or more resource elements a based on formula 2 (p,μ) k,l .a (p,μ) k,l It can also be called a physical resource. A physical resource can be one or more resource elements. [Formula 2]

[0319] The OFDM symbol index l in Formula 2 may be an index within an OFDM symbol allocated for PDSCH transmission. The one or more first resource elements used for PTRS may also not be used for the one or more second resource elements used for DMRS.

[0320] Can be based on at least k RE ref The subcarrier index k used for PTRS is determined. k can be determined based on one or both of the DMRS port (antenna port) and the DMRS setting type. RE ref For example, k may be determined based on the DMRS port (antenna port), the DMRS setting type, and whether part or all of the DMRS extension is applied. RE ref For example, k may also be determined based on part or all of the DMRS port (antenna port), DMRS setting type, whether DMRS extension is applied, and whether DMRS reception assistance is indicated. RE ref .

[0321] The DMRS transmission process for a PUSCH scheduled by a first PDCCH with a first DCI format may be applied to a PUSCH scheduled by a second PDCCH with a second DCI format. The first DCI format may be DCI format 0_1. The second DCI format may be DCI format 0_2.

[0322] When the transmitted PUSCH is not scheduled by DCI format 0_1 / 0_2 with a CRC encrypted by the first RNTI, and does not correspond to the set authorization, and is not a PUSCH for a type 2 random access procedure, the terminal device 1 may use the DMRS in DMRS port 0 to set a single-symbol forward DMRS of type 1. In addition, the remaining resource elements not used for DMRS may also not be used for the first PUSCH transmission. When conversion precoding is not applied, the first PUSCH transmission may not be a PUSCH with an allocation period of two or one OFDM symbols. Additional DMRS may be sent according to the scheduling type and PUSCH period. The first RNTI may be a C-RNTI, CS-RNTI, SP-CSI-RNTI or MCS-C-RNTI.

[0323] When frequency hopping is not applied, it can be assumed that the upper layer parameter dmrs-AdditionalPosition is equal to 'pos2' and at most two additional DMRS are transmitted per PUSCH period. When frequency hopping is applied, it can be expected that the upper layer parameter dmrs-AdditionalPosition is equal to 'pos1' and at most one additional DMRS is transmitted per PUSCH period.

[0324] When the PUSCH is scheduled by DCI format 0_0 with CRC scrambled by CS-RNTI, the terminal device 1 can use a single-symbol front DMRS at DMRS port 0. The single-symbol front DMRS can correspond to the DMRS setting type provided by the higher layer parameter dmrs-Type.

[0325] The maximum number of forward DMRS for PUSCH can be set by a first upper layer parameter. The first upper layer parameter can be an upper layer parameter maxLength or an upper layer parameter msgA-MaxLength. When the first upper layer parameter is not set, a single-symbol forward DMRS (single-symbol DMRS) can be scheduled by DCI, or it can also be set by a set authorization setting (set authorization). The number of additional DMRS for PUSCH can be set by a second upper layer parameter. The second upper layer parameter can be 'pos0', 'pos1', 'pos2', 'pos3'. For example, when the first upper layer parameter is not set, the second upper layer parameter can be 'pos0', 'pos1', 'pos2', 'pos3'. The second upper layer parameter can be dmrs-AdditionalPosition. When the first upper layer parameter is set, a single-symbol forward DMRS (single-symbol DMRS) or a double-symbol forward DMRS (double-symbol DMRS) can be scheduled by DCI, or it can also be set by a set authorization. In the case of setting the first upper layer parameter, the second upper layer parameter may be 'pos0', 'pos1'.

[0326] When the terminal device 1 that sends the first PUSCH is set by the upper layer parameter phaseTrackingRS, the terminal device 1 can assume that the first setting and the second setting are not generated simultaneously for the PUSCH sent. The first setting can be to schedule 4 to 7 DMRS ports in the case of DMRS setting type 1. The first setting can be to schedule 6 to 11 DMRS ports in the case of DMRS setting type 2. The second setting can be to send PTRS. The first PUSCH can be a PUSCH scheduled by DCI format 0_2. The first PUSCH can also be a PUSCH scheduled by DCI format 0_0 or DCI format 0_1. The first setting can also be to schedule 4 to 7 DMRS ports and any one of 12 to 15 DMRS ports in the case of DMRS setting type 1. The first setting can also be to schedule 6 to 11 DMRS ports and any one of 18 to 23 DMRS ports in the case of DMRS setting type 1. The first setting can also be to schedule 4 to 7 DMRS ports and any one of 12 to 15 DMRS ports in the case of DMRS setting type 1 and to schedule 4 to 7 DMRS ports and any one of 12 to 15 DMRS ports in the case of DMRS setting type 1 and applying DMRS extension. The first configuration may be that in the case of DMRS configuration type 1, any one of 6 to 11 DMRS ports and 18 to 23 DMRS ports is scheduled when DMRS extension is applied.

[0327] The process of PTRS transmission can be applied to the first PUSCH transmission (UE PUSCH transmission). The first PUSCH transmission can be a PUSCH transmission scheduled by the first DCI format when the first upper layer parameter is set. The first upper layer parameter can be phaseTrackingRS. The first DCI format can be DCI format 0_0, DCI format 0_1 ​​or DCI format 0_2. The first PUSCH transmission can also be a PUSCH transmission corresponding to the configured grant when the first upper layer parameter is set. PTRS can exist in the second PUSCH. The second PUSCH can be a PUSCH scheduled by a PDCCH with a CRC encrypted by a second RNTI. The second PUSCH can also be a PUSCH corresponding to the set grant. The second RNTI can be any one of MCS-C-RNTI, C-RNTI, CS-RNTI and SP-CSI-RNTI.

[0328] When conversion precoding is not applied and when the upper layer parameter phaseTrackingRS in the upper layer parameter DMRS-UplinkConfig is set, part or all of Action 1, Action 2, Action 3 and Action 4 may be performed, indicated, assumed or determined.

[0329] The maximum number of PTRS ports may be given by an upper layer parameter maxNrofPorts. The upper layer parameter maxNrofPorts may be an upper layer parameter in the upper layer parameter UplinkConfig. The terminal device 1 may not expect to set a number of PTRS ports (or UL PTRS ports) greater than the reported number.

[0330] The terminal device 1 may report a capability of supporting full-conherent UL transmission. When the terminal device 1 reports a capability of supporting full-conherent UL transmission, the terminal device 1 may expect the number of PTRS ports (or UL PTRS ports) to be set to one.

[0331] For PUSCH, two transmission methods may be supported. The two transmission methods may be codebook based transmission (codebook based transmission or codebook based UL transmission: codebook based transmission or codebook based UL transmission) and non-codebook based transmission (non-codebook based transmission or non-codebook based UL transmission: non-codebook based transmission or non-codebook based UL transmission).

[0332] A PTRS port can be associated with a DMRS port. In the case of codebook transmission or non-codebook transmission, the relationship between the PTRS port and the DMRS port (Association between (UL) PTRS port(s) and DMRS port(s)) can be notified (indicated) by signaling by the first field. The first field can be a PTRS-DMRS relationship field (PTRS-DMRSassociation field). The first field may be included in DCI format 0_1 ​​or DCI format 0_2. In the case where the PUSCH corresponds to the set authorization (e.g., the set authorization type 1), the relationship between the PTRS port and the DMRS port can be a value of 0 or "00" in the first field.

[0333] In case that PUSCH is scheduled by DCI format 0_0, a PTRS port may be associated with DMRS port 0.

[0334] In non-codebook transmission, the number (actual number) of PTRS ports can be determined based on the SRI (SRS resource indicator) in the first DCI format or the upper-layer parameter sri-ResourceIndicator. For example, the number (actual number) of PTRS ports can be 8. When two SRS resource sets are set, and when the upper-layer parameter usage is set to 'noncodebook', the number (actual number) of PTRS ports used for transmission corresponding to each SRS resource set can be determined based on the SRI corresponding to the associated SRS resource set, or can also be determined based on the upper-layer parameters srs-ResourceIndicator / srs-ResourceIndicator2 corresponding to the associated SRS resource set. The PTRS port index (PTRS port) can be set by the upper-layer parameter ptrs-PortIndex. For example, when the upper-layer parameter phaseTrackingRS is set, the PTRS port index can be set by the upper-layer parameter ptrs-PortIndex. The PTRS port index can be a PTRS port index for each set SRS resource.

[0335] In the case of codebook transmission of either partial-coherent or non-coherent, the number of PTRS ports (actual number) can be determined based on one or both of the TPMI and the number of layers. The number of layers can be determined based on the DCI format. For example, the number of layers can be indicated by the precoding information and number of layer (field) in the DCI format 0_1 ​​and the DCI format. In the case of setting 'n2' for the upper layer parameter maxNrofPorts, the transmission layer associated with the number of PTRS ports (actual number) can be derived from the TPMI. For example, antenna port (PUSCH antenna port) 1000 and antenna port 1002 in TPMI can share PTRS port 0. Antenna port 1001 and antenna port 1003 in TPMI can share PTRS port 1. PTRS port 0 can be associated with layer x. Layer x can be sent in antenna port 1000 and antenna port 1002 in TPMI. PTRS port 1 can be associated with layer y. Layer y may be transmitted in antenna port 1001 and antenna port 1003 in TPMI. One or both of x and y may be given by a PTRS-DMRS relationship (PTRS-DMRS relationship field) as a DCI parameter. 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.

[0336] PTRS port 0 can be associated with layer x'. Layer x' can be sent in some or all of the antenna ports {1000, 1002, 1004, 1006}. PTRS port 1 can be associated with layer y'. Layer y' can be sent in some or all of the antenna ports {1001, 1003, 1005, 1007}. When the upper layer parameter maxNrofPorts is 'n2', and in partial coherence or incoherence, layer x' and layer y' can be determined. When 8 antenna ports are applied, layer x' and layer y' can be given. When DMRS extension is applied, layer x' and layer y' can be given.

[0337] The precoding information-layer number field may be included in one or both of DCI format 0_1 ​​and DCI format 0_2. For example, the precoding information-layer number field may determine the number of layers and TPMI (or TPMI index). TPMI (Transmission Precoding Matrix Indicator: Transmission Precoding Matrix Indicator) may be used to determine the precoding matrix used for PUSCH. The precoding matrix may be used for mapping layers and antenna ports. The precoding matrix may be used for beamforming. The number of information bits constituting the precoding information-layer number field may be determined based on the number of antenna ports, the maximum number of ranks (layers), whether to apply transition precoding, the power mode, and part or all of the codebook subset. The information bit may be a bit field.

[0338] 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 / or CDM groups without data (DMRS-CDM groups). In the case of applying conversion precoding, the rank (number of layers) may be 1. In the case of applying conversion precoding, and in the case of the upper layer parameter dmrs-Type being 1, and in the case of the upper layer parameter maxLength being 1, and in the case of not applying DMRS extension, 1 of the 4 DMRS ports may be determined by the antenna port field. In the case of applying conversion precoding, and in the case of the upper layer parameter dmrs-Type being 1, and in the case of the upper layer parameter maxLength being 1, and in the case of applying DMRS extension, 1 of the 8 DMRS ports may be determined by the antenna port field.

[0339] In the case of applying conversion precoding, and in the case of the upper layer parameter dmrs-Type is 1, and in the case of the upper layer parameter maxLength is 2, and in the case of not applying DMRS extension, 1 DMRS port among 8 DMRS ports can be determined by the antenna port field. In the case of applying conversion precoding, and in the case of the upper layer parameter dmrs-Type is 1, and in the case of the upper layer parameter maxLength is 2, and in the case of applying DMRS extension, 1 DMRS port among 16 DMRS ports can be determined by the antenna port field.

[0340] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 1, and when DMRS extension is not applied, 1 DMRS port among 4 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 1, and when DMRS extension is applied, 1 DMRS port among 8 DMRS ports can be determined by the antenna port field.

[0341] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 2, and when DMRS extension is not applied, 2 of the 4 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 2, and when DMRS extension is applied, 2 of the 8 DMRS ports can be determined by the antenna port field.

[0342] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 3, and when DMRS extension is not applied, the DMRS ports {0, 1, 2} can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 3, and when DMRS extension is applied, 3 DMRS ports out of 8 DMRS ports can be determined by the antenna port field. When DMRS extension is applied, the combination of 3 DMRS ports determined by the antenna port field can be multiple.

[0343] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 1, and when DMRS extension is not applied, 1 DMRS port among 8 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 1, and when DMRS extension is applied, 1 DMRS port among 16 DMRS ports can be determined by the antenna port field.

[0344] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 2, and when DMRS extension is not applied, 2 of the 8 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 2, and when DMRS extension is applied, 2 of the 16 DMRS ports can be determined by the antenna port field.

[0345] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 3, and when DMRS extension is not applied, 3 DMRS ports out of 8 DMRS ports (or 7 DMRS ports) can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 3, and when DMRS extension is applied, 3 DMRS ports out of 16 DMRS ports (or 15 DMRS ports or 14 DMRS ports) can be determined by the antenna port field.

[0346] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 4, and when DMRS extension is not applied, 4 of the 8 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 1, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 4, and when DMRS extension is applied, 4 of the 16 DMRS ports can be determined by the antenna port field.

[0347] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 1, and when DMRS extension is not applied, 1 DMRS port among the 6 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 1, and when DMRS extension is applied, 1 DMRS port among the 12 DMRS ports can be determined by the antenna port field.

[0348] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 2, and when DMRS extension is not applied, 2 of the 6 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 2, and when DMRS extension is applied, 2 of the 12 DMRS ports can be determined by the antenna port field.

[0349] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 3, and when DMRS extension is not applied, 3 of the 6 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 3, and when DMRS extension is applied, 3 of the 12 DMRS ports can be determined by the antenna port field.

[0350] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 4, and when DMRS extension is not applied, 4 DMRS ports out of 6 DMRS ports (or 4 DMRS ports) can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 1, and when the rank (number of layers) is 4, and when DMRS extension is applied, 4 DMRS ports out of 12 DMRS ports (or 8 DMRS ports) can be determined by the antenna port field.

[0351] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 1, and when DMRS extension is not applied, 1 DMRS port among the 12 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 1, and when DMRS extension is applied, 1 DMRS port among the 24 DMRS ports can be determined by the antenna port field.

[0352] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 2, and when DMRS extension is not applied, 2 of the 12 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 2, and when DMRS extension is applied, 2 of the 24 DMRS ports can be determined by the antenna port field.

[0353] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 3, and when DMRS extension is not applied, 3 DMRS ports out of 12 DMRS ports (or 11 DMRS ports) can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 3, and when DMRS extension is applied, 3 DMRS ports out of 24 DMRS ports (or 22 DMRS ports) can be determined by the antenna port field.

[0354] When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 4, and when DMRS extension is not applied, 4 of the 12 DMRS ports can be determined by the antenna port field. When conversion precoding is not applied, and when the upper layer parameter dmrs-Type is 2, and when the upper layer parameter maxLength is 2, and when the rank (number of layers) is 4, and when DMRS extension is applied, 4 of the 24 DMRS ports can be determined by the antenna port field.

[0355] The rank (or the value of the rank) may be determined according to an SRS resource indicator field (SRS resource indicator field) or may be determined according to a precoding information-number of layers field.

[0356] Whether to apply DMRS reception assistance may be determined based on the DCI format. For example, the antenna port field included in the DCI format may determine whether to apply DMRS reception assistance. For example, one bit of the information bits constituting the antenna port field may determine whether to apply DMRS reception assistance.

[0357] The PTRS-DMRS association field may be included in one or both of DCI format 0_1 ​​and DCI format 0_2. When DMRS extension is not applied, the number of bits (information bits) constituting the PTRS-DMRS association field may be 2 bits. When DMRS extension is applied, the number of bits constituting the PTRS-DMRS association field may be 3 bits.

[0358] The PTRS-DMRS relationship field may indicate the relationship between the PTRS port and the DMRS port. One or two PTRS ports may be set by an upper layer parameter (e.g., maxNrofPorts). The DMRS port may be indicated by the antenna port field. In the case where the SRS resource indication field is present, and in the case where the maximum rank number is greater than 2, the PTRS-DMRS relationship field may indicate the relationship between the DMRS port corresponding to one or both of the SRS resource indication field and the precoding information-layer number field and the PTRS port.

[0359] In the case where the SRS resource indication field exists, and in the case where the SRS resource indication field is equal to "01" and "11", and in the case where the maximum rank number is 2, the high bit (Most significant Bit: MSB) of the PTRS-DMRS relationship field can indicate the relationship between the DMRS port corresponding to one or both of the SRS resource indication field and the precoding information-layer number field and the PTRS port. In addition, in these cases, the low bit (Least significant Bit: LSB) of the PTRS-DMRS relationship field can indicate the relationship between the DMRS port corresponding to one or both of the second SRS resource indication field (Second SRS resourceindicator field) and the second precoding information field (Second Precoding information field) and the PTRS port. The maximum rank number can be determined by the upper layer parameter maxRank.

[0360] The second PTRS-DMRS association field may be included in one or both of DCI format 0_1 ​​and DCI format 0_2. When DMRS extension is not applied, the number of bits (information bits) constituting the PTRS-DMRS association field may be 2 bits. When DMRS extension is applied, the number of bits constituting the PTRS-DMRS association field may be 3 bits. The second PTRS-DMRS association field may indicate the relationship between the DMRS port corresponding to one or both of the second SRS resource indication field and the second precoding information field and the PTRS port.

[0361] The second precoding information field may be included in one 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 SRS resource indicator field and the second SRS resource indicator field may be included in DCI format 0_1 ​​and DCI format 0_2.

[0362] The DMRS for PUSCH may be determined based on part or all of sequence generation, precoding, and mapping to physical resources. The sequence r(n) of the DMRS may be the same as the sequence of the DMRS for PDSCH. For example, the sequence r(n) of the DMRS may be determined based at least on a pseudo-random sequence c(i).

[0363] The transmitting unit and the baseband unit in the transmitting unit may generate a DMRS (DMRS sequence). The DMRS (DMRS sequence) r(n) may be mapped to a physical resource. For example, the DMRS r(n) may be mapped to a physical resource after being mapped to a virtual resource. The DMRS (PDSCH-DMRS) may be mapped to a virtual resource (or an intermediate quantity) a'. (p ' (j),μ) k,l。 The DMRS sequence r(n) may be mapped to a virtual resource a'( p ' , μ) k,l. In the case where DMRS reception assistance is not applied, k' may be {0,1}. In the case where 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 setting type. p' j It can be p'(j). p' j It can also be p'0~p' v-1 . v can be the number of layers. Based on the virtual resource a' of length v (p ' (j),μ) k,l The vector is converted into a physical resource a of length ρ through at least the precoding matrix W. (p,μ) k,l A vector of length v based on a virtual resource a' (p ' (j),μ) k,l The vector is converted into a physical resource a of length ρ by multiplying it with the precoding matrix W. (p,μ) k,l A vector of {p'0...p' v-1} can be a set of virtual antenna ports. A virtual antenna port can be a DMRS antenna port. A virtual antenna port and a DMRS antenna port can also be referred to as an antenna port. {p0...p ρ-1} may be an index of an antenna port. The precoding matrix W may be used for precoding for PUSCH. The precoding matrix may be determined by TPMI (TPMI index). That is, the precoding matrix may be determined based on the precoding information-layer number field in the DCI format.

[0364] The transmitting unit and the baseband unit in the transmitting unit can generate PTRS (PTRS sequence). The PTRS (PTRS sequence) in layer j can be generated. p ' (j) (m). For example, when j is j', r p ' (j ' ) (m) can be the DMRS sequence r(m). For example, when j is j", r p ' (j ” ) (m) may be a DMRS sequence r(m). For example, when j is not any of j' and j", r p ' (j)(m) can be 0. p'(j') can be an antenna port (virtual antenna port, DMRS port) associated with PTRS transmission. p'(j') and p'(j") can be antenna ports (virtual antenna port, DMRS antenna port) associated with PTRS transmission. p'(j') can be associated with the first DMRS port. p'(j") can be associated with the second DMRS port. One or both of the first DMRS port and the second DMRS port can be determined by the PTRS-DMRS relationship field.

[0365] PTRS (PTRS sequence) p ' (j) (m) can be mapped to physical resource a based on at least the precoding matrix W (p,μ) k,l For example, based on r of length v p’(j) The vector (m) is converted into a physical resource a of length ρ through at least the precoding matrix W. (p ,μ) k,l A vector. p can be {p0...p ρ-1}.

[0366] Can be based on at least k RE ref The subcarrier index k used for PTRS is determined. k can be determined based on one or both of the DMRS port p' and the DMRS setting type. RE ref For example, k may be determined based on the DMRS port p', the DMRS setting type, and whether part or all of the DMRS extension is applied. RE ref For example, k may also be determined based on part or all of the DMRS port p', the DMRS setting type, whether DMRS extension is applied, and whether DMRS reception assistance is indicated. RE ref .

[0367] As a technical issue, in order to increase the number of simultaneous connections of the majority of terminal devices, the expansion of DMRS ports is required. However, sometimes one or more first DMRS ports used by a terminal device (such as terminal device 1) interfere with one or more second DMRS ports used by other terminal devices. For example, interference may exist even when the resources (physical resources) used for the first DMRS port are different from the resources used for the second DMRS port. Moreover, interference may hinder communication. In addition, PTRS can also be used for phase error correction. However, since a PTRS port can correspond to one DMRS port in one or more DMRS ports, PTRS port enhancement is also required for the expansion of DMRS ports. For example, one or both of method 1 and method 2 can be used for part or all of DMRS port expansion, PTRS port enhancement, and interference suppression.

[0368] Fig. 9 : is a diagram showing an example of antenna port mapping to DMRS in one scheme of the present embodiment. The first DMRS (DMRS sequence) can be mapped to the resource elements corresponding to OFDM symbol 910 and antenna port #900 (AP#900). The second DMRS can be mapped to the resource elements corresponding to OFDM symbol 911 and antenna port #901 (AP#901). The third DMRS can be mapped to the resource elements corresponding to OFDM 912 and antenna port #902 (AP#902). Fig. 9 In , a block can be a resource element. Fig. 9 In the block with "+" or "-", DMRS can also be configured (mapped). Fig. 9 In the example, white blocks may not be configured with DMRS.

[0369] The first DMRS may be mapped to the first physical resource. The second DMRS may be mapped to the second physical resource. The third DMRS may be mapped to the third physical resource. The first physical resource may be based at least on OFDM symbol 910 and antenna port #900. The second physical resource may be based at least on OFDM symbol 911 and antenna port #901. The third physical resource may be based at least on OFDM symbol 912 and antenna port #902.

[0370] exist Fig. 9 In , DMRS extension can be applied. Fig. 9 In the present invention, DMRS reception assistance may be applied or not.

[0371] exist Fig. 9 In the above example, "+" can be w f (k') is +1. Fig. 9 In the example, "-" can be w f(k') is -1. Fig. 9 The DMRS in may be a single-symbol front DMRS in DMRS setting type 1. For example, w for the first DMRS corresponding to antenna port #900 f (k') can be {w f (0) = +1, w f (1) = -1, w f (2) = -1, w f (3) = +1}. w for the second DMRS corresponding to antenna port #901 f (k') can be {w f (0) = +1, w f (1) = -1, w f (2) = +1, w f (3) = -1}. w for the third DMRS corresponding to antenna port #902 f (k') can be {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}.

[0372] For example, antenna port #901 may be antenna port #902. That is, antenna port #901 may be the same as antenna port #902. OFDM symbol 911 may be the same as OFDM symbol 912. In the case of applying DMRS reception assistance, the second w f (k') to map the second DMRS. In the case where DMRS reception assistance is not applied, the second DMRS may be mapped based on the second w f (k') to map the third DMRS. f (k') may be {+1, -1, +1, -1}. In the case of applying DMRS reception assistance, k' may be {0, 1, 2, 3}, and may be based on the second w f (k') is used to map the second DMRS. In the case where DMRS reception assistance is not applied, k' may be {0,1}, and may be based on the second w f (k') is used to map the third DMRS.

[0373] exist Fig. 9, the CDM group corresponding to antenna port #900 may be the same as the CDM group corresponding to antenna port #901. The first DMRS and the second DMRS may be scheduled simultaneously. The CDM group corresponding to antenna port #900 may be the same as the CDM group corresponding to antenna port #902. It is also not expected that the first DMRS and the second DMRS may be scheduled simultaneously. It is also possible not to use both antenna port #900 and antenna port #902. For example, it is also possible not to use both antenna port #900 and antenna port #902. For example, in one or both of a PDSCH transmission and a PUSCH transmission, it is also possible not to use both antenna port #900 and antenna port #902.

[0374] OFDM symbol 910, OFDM symbol 911, and OFDM symbol 912 may be the same OFDM symbol. The base station device 3 may perform a first PDSCH transmission with a first DMRS for a first terminal device and a second PDSCH transmission with a second DMRS for a second terminal device in the same resource element. The base station device 3 may also not perform a first PDSCH transmission with a first DMRS for a first terminal device and a third PDSCH transmission with a third DMRS for a third terminal device in the same resource element.

[0375] The terminal device 1 at the antenna port #900 may not expect precoding of the cooperatively scheduled terminal device at the antenna port #902.

[0376] In the case where DMRS extension is not applied, antenna port #900 may not be used and antenna port #902 may also be used.

[0377] In method 1, the DMRS (DMRS sequence, DMRS sequence) r(·) for PDSCH can be mapped to one or more resource elements a (p,μ) k,l . The DMRS (DMRS sequence, DMRS sequence) r(·) used for PUSCH can be mapped to one or more virtual resources a' (p ' (j),μ) k,l The virtual resource can be mapped to one or more resource elements a based on the precoding matrix W. (p ,μ) k,l One or more resource elements may also be referred to as physical resources.

[0378] In the case where DMRS is mapped to physical resources (or virtual resources), w f(k'). That is, the DMRS can be mapped to the physical resource (or virtual resource) based on at least the first frequency domain orthogonal cover code index k' or the second frequency domain orthogonal cover code index k'. The first frequency domain orthogonal cover code index k' can be 0 and 1. The second frequency domain orthogonal cover code index k' can be 0, 1, 2 and 3.

[0379] In method 1, when DMRS reception assistance is not applied, the physical resource (or virtual resource) may be determined based on the first index k'. When DMRS reception assistance is applied, the physical resource (or virtual resource) may be determined based on the second index k'.

[0380] In the case where DMRS reception assistance is applied, it can be assumed that the number of subcarriers used for DMRS is greater than 4. In the case where DMRS reception assistance is not applied, it can be assumed that the number of subcarriers used for DMRS is greater than 2. In the case where DMRS reception assistance is applied, the length K associated with the mapping of DMRS in the frequency domain may be 4. In the case where DMRS reception assistance is not applied, the length K associated with the mapping of DMRS in the frequency domain may be 2. For example, the length K associated with the mapping of DMRS in the frequency domain may be the length of the frequency domain orthogonal cover code. In the case where the index associated with the subcarrier is k", the frequency domain orthogonal cover code index k' may be mod(k",K). Whether DMRS extension is applied may be determined by upper layer parameters. Whether DMRS reception assistance is applied may be determined based on the DCI format. The DCI format may indicate whether DMRS reception assistance is applied.

[0381] The first field in the DCI format can determine the antenna port (DMRS port). The second field in the DCI format can determine whether DMRS reception assistance is applied. The first field may be the same as the second field. That is, a 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, in the case where DMRS extension is applied, a field in the DCI format may indicate both the antenna port (DMRS port) and whether DMRS reception assistance is applied. For example, in the case where DMRS extension is not applied, a field in the DCI format may not indicate whether DMRS reception assistance is applied.

[0382] The maximum number of DMRS ports in the case of applying DMRS extension may be greater than the maximum number of DMRS ports in the case of not applying DMRS extension. For example, in the case of applying DMRS extension, the maximum number of DMRS ports may be a first value. In the case of not applying DMRS extension, the maximum number of DMRS ports may be a second value.

[0383] In method 2, a PTRS for PDSCH (PTRS sequence, sequence of PTRS) may be given. A PTRS for PUSCH (PTRS sequence, PTRS sequence) may be given. One or two DMRS ports of one or more DMRS ports may be determined based on a field in the DCI format. One or two DMRS ports may be associated with a PTRS port, respectively. The PTRS port may be an antenna port associated with PTRS transmission.

[0384] In the case where DMRS extension is not applied, one field may consist of 0 or X bits. In the case where DMRS extension is applied, one field may consist of 0 or X' bits. X' bits may be greater than X bits. X bits may be 2 bits. X' bits may be 3 bits. In the case where DMRS extension is applied, and in the case of application layer extension, one field may consist of 0 or X' bits. The maximum number of layers in the case of application layer extension may be more than the maximum number of layers in the case where layer extension is not applied. For example, in the case of application layer extension, uplink transmission of up to 8 layers may be performed. In the case of application layer extension, one field may consist of 0 or X' bits.

[0385] The subcarrier index for PTRS may be determined based at least on whether DMRS extension is applied. For example, k may be determined based at least on whether DMRS extension is applied. RE ref .

[0386] In method 2, when DMRS extension is applied, PTRS may not be sent. For example, when DMRS extension is applied, and when a certain antenna port is used, PTRS may not be sent or determined. The certain antenna port may be an antenna port (DMRS port) that is available by applying DMRS extension. For example, when DMRS extension is applied, and when DMRS reception assistance is applied, PTRS may not be sent or determined. For example, when DMRS extension is applied, and when DMRS reception assistance is not applied, PTRS may be sent or determined. When DMRS extension is applied, it can be assumed that PTRS does not exist. When the upper layer parameter phaseTrackingRS is set, it may not be expected to apply DMRS extension. When DMRS extension is applied, it may not be expected to set the upper layer parameter phaseTrackingRS.

[0387] In the case where PTRS is mapped in a certain resource element of the first antenna port, data may not be mapped in the certain resource element of the second antenna port. In the case where PTRS is mapped in a certain resource element of the first antenna port for terminal device 1, data may not be expected to be mapped in the certain resource element of the second antenna port for the collaboratively scheduled terminal device. In the case where DMRS extension is applied to terminal device 1, terminal device 1 may not expect that DMRS extension is not applied to the collaboratively scheduled terminal device. In the case where DMRS reception assistance is applied to terminal device 1, terminal device 1 may not expect that DMRS reception assistance is not applied to the collaboratively scheduled terminal device.

[0388] In the case of sending PTRS in one or more resource elements of the first antenna port, it is also possible not to expect to send data or signals in the one or more resource elements of the second antenna port. The first antenna port may be antenna port #900. The first antenna port may also be one of the antenna ports available by applying DMRS extension. The first antenna port may also be an antenna port for terminal device 1. The second antenna port may also be an antenna port for terminal device 1 or another terminal device (e.g., a co-scheduled terminal device).

[0389] The antenna port available by applying the DMRS extension may not be the antenna port associated with the PTRS. For example, it may also be assumed that there is no PTRS in the antenna port available by applying the DMRS extension.

[0390] The terminal device 1 may include a receiving unit for receiving a PDSCH and a DCI format indicating reception of the PDSCH. The terminal device 1 may also include a transmitting unit or a baseband unit in the transmitting unit for generating a part or all of the PDSCH, the DMRS (DMRS sequence) for the PDSCH, and the PTRS (PTRS sequence) for the PDSCH.

[0391] The DCI format may include a first field. The first field may indicate the first information or may not indicate the first information. The indication of the first information may be application of DMRS reception assistance. The first field may be an antenna port field.

[0392] The DMRS may be mapped to one or more resource elements (or physical resources). One or more resource elements may be determined based on a first index or a second index. The value that the first index may take may be different from the value that the second index may take. The first index may be a value of 0 and 1. The second index may be a value of 0, 1, 2, and 3. The first index and the second index may be indexes in the frequency domain. The first index and the second index may be frequency domain orthogonal cover code indexes.

[0393] One or more resource elements may be determined based on the first length or the second length. The first length may be 2. The second length may be 4. The first length and the second length may be lengths in the frequency domain. The first length and the second length may be w f The first length and the second length may be the lengths of the frequency domain orthogonal cover code.

[0394] In the case where the first field does not indicate the first information, one or more resource elements may be determined based on one or both of the first index and the first length. In the case where the first field indicates the first information, one or more resource elements may be determined based on one or both of the second index and the second length.

[0395] The terminal device 1 may have a wireless resource control layer processing unit that receives a first upper layer parameter. The first upper layer parameter may be a parameter related to one or both of the number of DMRS ports and the maximum number of DMRS ports. For example, when the first upper layer parameter is set, the DCI format may include a first field. When the first upper layer parameter is not set, the DCI format may not include the first field. When the first upper layer parameter is set, the maximum number of DMRS ports may be a first value. When the first upper layer parameter is not set, the maximum number of DMRS ports may be a second value. The first value may be different from the second value. The first upper layer parameter may be ExtendedDMRSports.

[0396] The terminal device 1 may include a receiving unit for receiving a PDCCH to which the DCI is mapped. The terminal device 1 may also include a transmitting unit for transmitting a part or all of a PUSCH, a DMRS for a PUSCH, and a PTRS for a PUSCH. The DCI may indicate the transmission of the PUSCH. The terminal device 1 may also include a transmitting unit for generating a DMRS (DMRS sequence) for a PUSCH and a PTRS (PTRS sequence) for a PUSCH, or a baseband unit in the transmitting unit. A DMRS sequence for a PUSCH may be defined. A PTRS sequence for a PUSCH may be given.

[0397] The DCI format may include a second field. The second field may indicate one DMRS port among N DMRS ports. A PTRS port may be determined based on one DMRS port. The second field may indicate two DMRS ports among N' DMRS ports. Two PTRS ports may be determined based on two DMRS ports. A PTRS port for PTRS may be determined based on the second field and one or more DMRS ports for DMRS. An antenna port associated with PTRS may also be determined based on the second field and one or more DMRS ports for DMRS.

[0398] When the second upper layer parameter is not set, the second field may be composed of a first number of bits (number of information bits). When the second upper layer parameter is set, the second field may be composed of a second number of bits (number of information bits). The first number of bits may be 2 bits. The second number of bits may be 3 bits.

[0399] The terminal device 1 may have a wireless resource control layer processing unit that receives a second upper layer parameter. The second upper layer parameter may be a parameter related to one or both of the number of DMRS ports and the maximum number of DMRS ports. When the first upper layer parameter is set, the maximum number of DMRS ports may be a third value. When the first upper layer parameter is not set, the maximum number of DMRS ports may be a second value. The first value may be different from the fourth value. The first upper layer parameter may be set for the downlink. The second upper layer parameter may be set for the uplink. The second upper layer parameter may be ExtendedDMRSports.

[0400] Hereinafter, various device aspects of one aspect of the present embodiment will be described.

[0401] (1) In order to achieve the above-mentioned purpose, the scheme of the present invention adopts the following means. That is, the first scheme of the present invention is a terminal device, which has a receiving unit for receiving a PDSCH and a DCI format indicating the reception of the PDSCH, the DCI format includes a first field, the DMRS used for the PDSCH is mapped to one or more resource elements, the one or more resource elements are determined based on a first index or a second index, the value that the first index can take is different from the value that the second index can take, when the first field does not indicate the first information, the one or more resource elements are determined based on the first index, when the first field indicates the first information, the one or more resource elements are determined based on the second index. It also has a wireless resource control layer processing unit that receives a first upper layer parameter, the first upper layer parameter is related to the maximum number of DMRS ports used for the DMRS.

[0402] (2) A second scheme of the present invention is a base station device, comprising a transmission unit for transmitting a PDSCH and a DCI format for indicating reception of the PDSCH, the DCI format comprising a first field, a DMRS for the PDSCH being mapped to one or more resource elements, the one or more resource elements being determined based on a first index or a second index, the first index being able to take a value different from the second index being able to take a value, when the first field does not indicate first information, the one or more resource elements being determined based on the first index, and when the first field indicates the first information, the one or more resource elements being determined based on the second index. The base station device also comprises a radio resource control layer processing unit for transmitting a first upper layer parameter, the first upper layer parameter being related to a maximum number of DMRS ports for the DMRS.

[0403] (3) The third scheme of the present invention is a terminal device, comprising: a receiving unit, receiving a PDCCH in a DCI format that maps an indication of the transmission of a PUSCH; a transmitting unit, transmitting the PUSCH; and the transmitting unit, generating a DMRS for the PUSCH and a PTRS for the PUSCH, wherein a first upper layer parameter is related to a maximum number of DMRS ports for the DMRS, and when the first upper layer parameter is not set, a first field in the DCI format is composed of a first number of bits, and when the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, and a PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

[0404] (4) The fourth scheme of the present invention is a terminal device, comprising: a sending unit, which sends a PDCCH in a DCI format that maps a PUSCH; and a receiving unit, which receives the PUSCH, wherein the terminal device generates a DMRS for the PUSCH and a PTRS for the PUSCH, wherein a first upper layer parameter is related to a maximum number of DMRS ports for the DMRS, and when the first upper layer parameter is not set, a first field in the DCI format is composed of a first number of bits, and when the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, and a PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

[0405] The program operating in the base station device 3 and the terminal device 1 according to one embodiment of the present invention may be a program (a program that causes a computer to function) that controls a CPU (Central Processing Unit) and the like to realize the functions of the above-mentioned embodiment according to one embodiment of the present invention. Then, the information processed by these devices is temporarily stored in a RAM (Random Access Memory) when processing, and then stored in various ROMs such as a Flash ROM (Read Only Memory) and a HDD (Hard Disk Drive), and is read, modified, and written by the CPU as needed.

[0406] It should be noted that a part of the terminal device 1 and the base station device 3 of the above embodiment may also be implemented by a computer. In this case, the program for implementing the control function may be recorded in a computer readable recording medium, and the program recorded in the recording medium may be read into a computer system and executed.

[0407] It should be noted that the "computer system" mentioned here refers to a computer system built into the terminal device 1 or the base station device 3, and includes hardware such as an OS and external devices. In addition, "computer-readable recording medium" refers to removable media such as a floppy disk, a magneto-optical disk, a ROM, a CD-ROM, and a storage device such as a hard disk built into the computer system.

[0408] Furthermore, "computer-readable recording medium" may also include: a recording medium that stores a program dynamically for a short period of time, such as a communication line when the program is transmitted via a network such as the Internet or a communication line such as a telephone line; and a recording medium that stores a program for a fixed period of time, such as a volatile memory inside a computer system that serves as a server or client in this case. In addition, the above program may be a program for realizing a part of the above functions, or a program that can realize the above functions by combining with a program already recorded in a computer system.

[0409] In addition, the base station device 3 in the above-mentioned embodiment can also be implemented as an aggregate (device group) composed of multiple devices. Each device constituting the device group can have a part or all of the functions or functional blocks of the base station device 3 involved in the above-mentioned embodiment. As a device group, it is sufficient to have all the functions or functional blocks of the base station device 3. In addition, the terminal device 1 involved in the above-mentioned embodiment can also communicate with the base station device as an aggregate.

[0410] In addition, the base station device 3 of the above-mentioned embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or NG-RAN (NextGenRAN, NR RAN). In addition, the base station device 3 of the above-mentioned embodiment may also have part or all of the functions of the upper node for eNodeB and / or gNB.

[0411] In addition, part or all of the terminal device 1 and the base station device 3 of the above-mentioned embodiment may be implemented as an LSI, which is typically an integrated circuit, or as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually chip-based, or part or all of the functional blocks may be integrated and chip-based. In addition, the method of integrated circuitization is not limited to LSI, and may be implemented by a dedicated circuit or a general-purpose processor. In addition, when a technology for integrated circuitization that replaces LSI emerges with the advancement of semiconductor technology, an integrated circuit based on the technology may also be used.

[0412] In addition, in the above-mentioned 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 fixed or non-movable electronic devices installed indoors and outdoors, such as AV equipment, kitchen equipment, cleaning / washing equipment, air-conditioning equipment, office equipment, vending machines and other life equipment and other terminal devices or communication devices.

[0413] The embodiments of the present invention are described in detail with reference to the accompanying drawings, but the specific configuration is not limited to the present embodiment, and also includes design changes within the scope of the gist of the present invention. In addition, a scheme of the present invention can be variously changed within the scope shown in the technical scheme, and the embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. In addition, it also includes a configuration obtained by replacing the elements that have the same effect as the elements recorded in the above-mentioned embodiments with each other. Industrial Applicability

[0414] One aspect of the present invention can be used for example in a communication system, a communication device (such as a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (such as a communication chip), a program, or the like. Description of Reference Numerals 1(1A, 1B, 1C): Terminal device 3: Base station device 10, 30: Wireless transceiver 10a, 30a: Wireless transmission unit 10b, 30b: Wireless receiving unit 11, 31: Antenna 12, 32: RF department 13, 33: Baseband 14, 34: Upper processing unit 15, 35: Media access control layer processing unit 16, 36: Radio resource control layer processing unit 91, 92, 93, 94: Search area set 300: Component carrier 301: Main cell 302, 303: Auxiliary cells 700: A collection of resource elements for PSS 710, 711, 712, 713: A set of resource elements for PBCH and DMRS for PBCH 720: A collection of resource elements for SSS 3000: points 3001, 3002: Resource grid 3003, 3004: BWP 3011, 3012, 3013, 3014: Offset 3100, 3200: Public resource block set 900, 901, 902: Antenna ports 910, 911, 912: OFDM symbols

Claims

1. A terminal device comprising: A receiving unit, receiving a PDCCH in a DCI format in which a transmission indication of a PUSCH is mapped; A sending unit, sending the PUSCH; and The transmitting unit generates a DMRS for the PUSCH and a PTRS for the PUSCH, The first upper layer parameter is related to the maximum number of DMRS ports for the DMRS, In the case where the first upper layer parameter is not set, the first field in the DCI format is composed of a first number of bits, In the case where the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, A PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

2. A base station device, comprising: a transmitting unit configured to transmit a PDCCH in a DCI format in which a transmission instruction of a PUSCH is mapped; and A receiving unit receives the PUSCH, The base station device generates a DMRS for the PUSCH and a PTRS for the PUSCH, The first upper layer parameter is related to the maximum number of DMRS ports for the DMRS, In the case where the first upper layer parameter is not set, the first field in the DCI format is composed of a first number of bits, In the case where the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, A PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

3. A communication method, used in a terminal device, comprising the following steps: Receiving a PDCCH in a DCI format that is mapped to indicate transmission of a PUSCH; transmitting the PUSCH; and generating a DMRS for the PUSCH and a PTRS for the PUSCH, The first upper layer parameter is related to the maximum number of DMRS ports for the DMRS, In the case where the first upper layer parameter is not set, the first field in the DCI format is composed of a first number of bits, In the case where the first upper layer parameter is set, the first field in the DCI format is composed of a second number of bits, A PTRS port for the PTRS is determined based on the first field and one or more DMRS ports for the DMRS.

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