Terminal device, base station device, and communication method

Abstract

This terminal device is provided with: a generation unit that generates an SRS sequence; a transmission unit that transmits an SRS resource to which the SRS sequence is mapped; and a radio resource control layer processing unit that receives an upper layer parameter, the SRS resource comprising at least a first number of OFDM symbols, the SRS sequence being determined on the basis of at least a cyclic shift, the cyclic shift being determined on the basis of at least a cyclic shift initial value, the cyclic shift initial value being determined for each second number of OFDM symbols, and the cyclic shift initial value being determined on the basis of each second number of OFDM symbols. The second number of OFDM symbols is determined based on the upper layer parameter, the second number of OFDM symbols being less than the first number of OFDM symbols or being the same as the first number of OFDM symbols.

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. 2022-100122 filed in Japan on June 22, 2022, and the contents 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: Syudy 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 generating unit, which generates an SRS sequence; a sending unit, which sends an SRS resource mapping the SRS sequence; and a wireless resource control layer processing unit, which receives an upper layer parameter, wherein the SRS resource is composed of at least a first number of OFDM symbols, the SRS sequence is determined at least based on a cyclic shift, the cyclic shift is determined at least based on an initial cyclic shift value, the initial cyclic shift value is determined according to each second number of OFDM symbols, the second number of OFDM symbols is determined based on the upper layer parameter, and the second number of OFDM symbols is less than the first number of OFDM symbols or is the same as the first number of OFDM symbols.

[0008] (2) In addition, the second scheme of the present invention is a base station device, comprising: a receiving unit, receiving an SRS resource mapped with an SRS sequence; and a wireless resource control layer processing unit, sending an upper layer parameter, in which the SRS sequence is generated, the SRS resource is composed of at least a first number of OFDM symbols, the SRS sequence is determined at least based on a cyclic shift, the cyclic shift is determined at least based on an initial cyclic shift value, the initial cyclic shift value is determined according to each second number of OFDM symbols, the second number of OFDM symbols is determined based on the upper layer parameter, the second number of OFDM symbols is less than the first number of OFDM symbols or is the same as the first number of OFDM symbols.

[0009] (3) In addition, the third scheme of the present invention is a communication method for a terminal device, wherein the communication method comprises the following steps: generating an SRS sequence; sending an SRS resource mapping the SRS sequence; and receiving an upper layer parameter, the SRS resource is composed of at least a first OFDM symbol number, the SRS sequence is determined at least based on a cyclic shift, the cyclic shift is determined at least based on an initial cyclic shift value, the initial cyclic shift value is determined according to each second OFDM symbol number, the second OFDM symbol number is determined based on the upper layer parameter, the second OFDM symbol number is less than the first OFDM symbol number or is the same as the first OFDM symbol number.

[0010] (4) In addition, the fourth scheme of the present invention is a communication method for a base station device, wherein the communication method comprises the following steps: receiving an SRS resource mapping an SRS sequence; and sending an upper layer parameter, in which the SRS sequence is generated, the SRS resource is composed of at least a first number of OFDM symbols, the SRS sequence is determined based on at least a cyclic shift, the cyclic shift is determined based on at least an initial cyclic shift value, the initial cyclic shift value is determined according to each second number of OFDM symbols, the second number of OFDM symbols is determined based on the upper layer parameter, the second number of OFDM symbols is less than the first number of OFDM symbols or is the same as the first number of OFDM symbols. 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 1 This 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 slotsymb 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 cyclic shift hopping for SRS according to 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 real number C. For example, floor(C) may be a function that outputs the largest integer within a range not exceeding real number C. ceil(D) may be a ceiling function for real number D. For example, ceil(D) may be a function that outputs the smallest integer 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. Here, 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. Here, 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. "·" represents 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. At least CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplex) is used in the downlink. 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 more than two downlink component carriers and more than two uplink component carriers. The downlink component carrier and the uplink component carrier 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 parameter set (numero1ogy). For example, one resource grid may be provided for a set of a certain antenna port p, a certain subcarrier spacing configuration μ, and a certain transmission direction x.

[0022] The resource grid includes N size，μ grid,x N RB sc Here, 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.

[0023] The resource grid includes N subframe，μ symb OFDM symbols.

[0024] 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.

[0025] 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,x The 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.

[0026] The subcarrier spacing (SCS: SubCarrier Spacing) Δf for a certain subcarrier spacing setting μ may be Δn2μ·15kHz. Here, the subcarrier spacing setting μ may represent any one of 0, 1, 2, 3, or 4.

[0027] 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.

[0028] 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 / (Δfmax·Nf). 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.

[0029] 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 Tsf = (Δf max N f / 1000)·T s =1ms. The number of OFDM symbols in each subframe is Nsubframe，μ symb =N slot symb N subframe,μ slot .

[0030] 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.

[0031] 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.

[0032] 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, the 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.

[0033] 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.

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

[0035] Point 3000 is an identifier for identifying a certain subcarrier. Point 3000 is also referred to as point A. Common resource block (CRB: Common resource block) set 3100 is a set of common resource blocks for the subcarrier spacing setting μ1.

[0036] 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 .

[0037] 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 gridl，x A common resource block.

[0038] The offset 3013 is the distance from the reference point of the resource grid 3001 to the reference point (N) of the BWP (BandWidthPart: partial bandwidth) 3003 of index i1. start，μ BWP,i1 ) offset.

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

[0040] 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.

[0041] 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.

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

[0043] 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).

[0044] 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.

[0045] 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.

[0046] 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 is μ 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.

[0047] 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.

[0048] 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.

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

[0050] 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). Here, 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 (spatialRxparameters). The beam parameters of the first antenna port and the second antenna port being QCL may be that 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 are the same (or corresponding). The beam parameters of the first antenna port and the second antenna port being QCL may also be that 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 are the same (or corresponding). Terminal device 1 may assume that the two antenna ports are QCL when the large-scale characteristics of the channel that transmits symbols at one antenna port can be estimated from the channel that transmits symbols at the other antenna port. The two antenna ports may be QCL, which may also mean assuming that the two antenna ports are QCL.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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 the PDSCH DMRS. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of the PDCCH DMRS. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of the CSI-RS. For example, the wireless transmission unit 30a may generate and transmit a baseband signal of the DL PTRS. For example, the generating unit in the wireless transmission unit 30a may also generate a baseband signal.

[0055] 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.

[0056] 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.

[0057] The media access control layer processing unit 35 included in the upper layer processing unit 34 performs processing at the MAC layer.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 .

[0064] 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.

[0065] One or more serving cells (or component carriers, downlink component carriers, uplink component carriers) may be configured for the terminal device 1 .

[0066] 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).

[0067] 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 (performed cell).

[0068] 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.

[0069] The SCell may be included in either the MCG or the SCG.

[0070] 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.

[0071] 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).

[0072] 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).

[0073] 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.

[0074] PDSCH, PDCCH and CSI-RS may not be received in a downlink BWP other than the activated downlink BWP (inactivated downlink BWP). Terminal device 1 may also attempt to receive PDSCH, PDCCH and CSI-RS in a downlink BWP that is not an activated downlink BWP. PUCCH and PUSCH may not be sent in an uplink BWP that is not an activated uplink BWP (inactivated uplink BWP). Terminal device 1 may 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 also be generating an SRS sequence.

[0082] 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.

[0083] 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.

[0084] The media access control layer processing unit 15 included in the upper layer processing unit 14 performs processing at the MAC layer.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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 .

[0089] 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.

[0090] 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.

[0091] 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.

[0092] The following describes the physical signal (signal).

[0093] 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.

[0094] 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 CHanne1: Physical Uplink Control Channel) PUSCH (Physical Uplink Shared CHannel: Physical Uplink Shared Channel) PRACH (Physical Random Access CHannel)

[0095] PUCCH can be used to send uplink control information (UCI: Uplink Control Information). PUCCH can be sent to deliver, transmit, convey uplink control information. Uplink control information can be mapped to PUCCH. Terminal device 1 can send PUCCH configured with uplink control information. Base station device 3 can receive PUCCH configured with uplink control information.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] A transport block is an information bit sequence delivered from an upper layer. Here, the information bit sequence is also referred to as a bit sequence. Here, the transport block can be distributed via the UL-SCH (UpLink-Shared Channel) of the transport layer.

[0100] HARQ-ACK for a transport block is sometimes referred to as HARQ-ACK for PDSCH. In this case, "HARQ-ACK for PDSCH" means HARQ-ACK for a transport block included in PDSCH.

[0101] HARQ-ACK may also represent ACK or NACK corresponding to a CBG (Code Block Group) included in a transport block.

[0102] 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.

[0103] 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).

[0104] 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 the physical signal at least used for channel measurement. Channel measurement can include interference measurement.

[0105] 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.

[0106] 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.

[0107] 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) is given by x u,v (n) = x u (mod(n+C v ,L RA )) is defined. Here, x u is a ZC (ZadoffChu) 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.

[0108] 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 u of the PRACH sequence may be added to each of the 64 random access preambles determined.

[0109] 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)

[0110] UL DMRS is a general term for DMRS for PUSCH and DMRS for PUCCH.

[0111] 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.

[0112] 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.

[0113] The propagation path of the PUSCH can be estimated based on the DMRS used for the PUSCH.

[0114] 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.

[0115] 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 provided in 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.

[0116] The propagation path of the PUCCH can be estimated by the DMRS used for the PUCCH.

[0117] 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)

[0118] 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 in 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.

[0119] 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

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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)

[0128] 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. Here, the DCI format specific field included in DCI format 0_0 may represent 0.

[0129] The frequency domain resource allocation field included in DCI format 0_0 may be used to indicate frequency resource allocation for the PUSCH.

[0130] The time domain resource allocation field included in DCI format 0_0 may be used to indicate the time resource allocation of the PUSCH.

[0131] The frequency hopping flag field may be used to indicate whether frequency hopping is applied to the PUSCH.

[0132] 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.

[0133] DCI format 0_0 may not include a field for CSI request (CSI request).

[0134] 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 belongs may be the same. The terminal device 1 may recognize that the PUSCH scheduled by 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.

[0135] DCI format 0_0 may not include a BWP field. Here, DCI format 0_0 may be a DCI format for scheduling PUSCH without changing the activated uplink BWP. The 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.

[0136] 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

[0137] The DCI format specific field included in DCI format 0_1 ​​may represent 0.

[0138] The frequency domain resource allocation field included in DCI format 0_1 ​​may be used to indicate frequency resource allocation for PUSCH.

[0139] The time domain resource allocation field included in DCI format 0_1 ​​may be used to indicate time resource allocation for PUSCH.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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. Here, 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".

[0144] The CSI request field is used to indicate a CSI report.

[0145] 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).

[0146] 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

[0147] The DCI format specific field included in DCI format 1_0 may represent 1.

[0148] 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.

[0149] 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.

[0150] The MCS field 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 the target coding rate for the 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.

[0151] 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.

[0152] The PUCCH resource indication field may be a field indicating any index of one or more PUCCH resources included in a PUCCH resource set. The PUCCH resource set may include one or more PUCCH resources.

[0153] DCI format 1_0 may not include a carrier indicator field. That is, a downlink component carrier configured with a PDSCH scheduled by DCI format 1_0 may be the same as a downlink component carrier configured with a 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 the downlink component carrier.

[0154] DCI format 1_0 may not include a BWP field. Here, 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.

[0155] 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

[0156] The DCI format specific field included in DCI format 1_1 may represent 1.

[0157] 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.

[0158] 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.

[0159] The MCS field included in 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] The DCI format 1_1 includes a BWP field, but in the case where 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 WP field. Here, in the case where 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".

[0165] 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).

[0166] 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.

[0167] 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)

[0168] 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).

[0169] 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).

[0170] 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.

[0171] The antenna ports of PSS, SSS, PBCH, and DMRS for PBCH may be the same.

[0172] 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.

[0173] DL DMRS is a general term for DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] 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).

[0180] 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.

[0181] 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.

[0182] In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) control is performed on each transport block.

[0183] 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.

[0184] The upper layer parameters shared by multiple terminal devices 1 are also referred to as common upper layer parameters. Here, the common upper layer parameters can be defined as parameters specific to a serving cell. Here, the parameters specific to a serving cell can be parameters shared by the terminal devices (e.g., terminal devices 1-A, B, C) that set the serving cell.

[0185] 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.

[0186] 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. Here, 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.

[0187] 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.

[0188] The RRC message includes one or more parameters managed in the RRC layer. Here, the parameters managed in the RRC layer are also referred to as RRC parameters. For example, the RRC message may include the 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 referred to as a dedicated RRC message.

[0189] 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.

[0190] 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

[0191] 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.

[0192] 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.

[0193] The SS / PBCH block candidates indicate resources for which transmission of SS / PBCH blocks is permitted (able to, reserved, set, specified, or possible).

[0194] 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.

[0195] 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.

[0196] Random access is a process including at least part or all of message 1, message 2, message 3 and message 4.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] The retransmission of message 3 PUSCH is scheduled by DCI format 0_0 with CRC scrambled based on TC-RNTI (Temporary Cell-Radio Network Temporary Identifier).

[0203] 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.

[0204] Data communication is a general term for downlink communication and uplink communication.

[0205] 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.

[0206] 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).

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] 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

[0214] 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.

[0215] 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 .

[0216] 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.

[0217] 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, 1, 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.

[0218] 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]. 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.

[0219] 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, 1, 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.

[0220] 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]. 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.

[0221] 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).

[0222] 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).

[0223] 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).

[0224] 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).

[0225] 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).

[0226] 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] Repeated transmission may also be applied to the PUSCH. For example, repeated transmission may also be applied to the PUSCH scheduled by DCI. In addition, repeated transmission may also be applied to the PUSCH scheduled by the set uplink grant. The PUSCH repetition type may be any one of PUSCH repetition type A and PUSCH repetition type B. The PUSCH repetition type may be set by upper layer parameters. The PUSCH repetition type may be based on the DCI format. For example, the first PUSCH repetition type of the PUSCH scheduled by DCI format 0_1 ​​may be different from the second PUSCH repetition type of the PUSCH scheduled by DCI format 0_2.

[0237] The number of repetitions for PUSCH repeated transmission can be set by upper layer parameters. For example, the upper layer parameter numberOfRepetitioins can be a parameter including the number of repetitions for PUSCH repeated transmission. In the PUSCH repeated transmission corresponding to PUSCH repetition type A, the number of repetitions for PUSCH repeated transmission can be determined by the value of the upper layer parameter numberOfRepetitions. In PUSCH repetition type A, when there is numberOfRepetitions in the resource allocation table, the number of repetitions of the PUSCH scrambled by any one of C-RNTI, MCS-C-RNTI and CS-RNTI and sent through the DCI format indication with CRC can be equal to numberOfRepetitions. When a PUSCH-TimeDomainResourceAllocation includes one or more PUSCH-Allocations, the upper layer parameter numberOfRepetitions can be set for each PUSCH-Allocation. In addition, PUSCH-TimeDomainResourceAllocation can be called a resource allocation table.

[0238] The upper layer parameter push-AggregationFactor may be a parameter indicating the number of repetitions of PUSCH repetition transmission. In PUSCH repetition transmission corresponding to PUSCH repetition type A, the number of repetitions for PUSCH repetition transmission may be determined by the value of the upper layer parameter push-AggregationFactor. In PUSCH repetition type A, when push-AggregationFactor is set, the number of repetitions of PUSCH scrambled by any one of C-RNTI, MCS-C-RNTI and CS-RNTI and transmitted through a DCI format indication with an attached CRC may be equal to push-AggregationFactor. push-AggregationFactor may be set for PUSCH-Config.

[0239] The number of repetitions corresponding to PUSCH repetition type A may be the number of slots used for PUSCH repetition transmission. In addition, one TB may be repeated in one or more slots. PUSCH repetitions transmitted in different slots may apply the same OFDM symbol allocation.

[0240] In the PUSCH repetition transmission corresponding to the PUSCH repetition type B, it can be based on nominal repetition (NominalRepetition) and actual repetition (ActualRepetition).

[0241] The frequency hopping mode can be set by upper layer parameters. The upper layer parameters frequencyHopping, frequencyHoppingDCI-0-1 and frequencyHoppingDCI-0-2 can be parameters for providing a frequency hopping mode for PUSCH. For example, the frequency hopping mode corresponding to the frequency hopping for PUSCH can be set by frequencyHoppingDCI-0-2 in PUSCH-Config. In addition, the frequency hopping mode corresponding to the frequency hopping for PUSCH can also be set by frequencyHopping in PUSCH-Config. In addition, the frequency hopping mode corresponding to the frequency hopping for the set PUSCH transmission can also be set by frequency hopping (frequency Hopping) in configuredGrantConfig. The frequency hopping mode can be any one of intra-slot frequency hopping, inter-slot frequency hopping and inter-repetition frequency hopping. In addition, the frequency hopping interval corresponding to intra-slot frequency hopping can be within one slot. The frequency hopping interval corresponding to inter-slot frequency hopping can be one slot or multiple slots. The frequency hopping interval corresponding to inter-repetition frequency hopping can be based on nominal repetition.

[0242] For example, the frequency hopping interval may be provided by an upper layer parameter. For example, the upper layer parameter may be a dedicated upper layer parameter.

[0243] Whether to perform frequency hopping may be determined at least based on the DCI. Whether frequency hopping is applied to the PUSCH sent by the DCI format indication may be determined at least based on the value of the frequency hopping flag field included in the DCI format. Whether frequency hopping is applied to the PUSCH sent by the random access response indication may also be determined at least based on the value of the frequency hopping flag field included in the random access response grant. For example, frequency hopping for the PUSCH may also be performed based at least on the value of the frequency hopping flag field being 1.

[0244] Intra-slot frequency hopping may also be applied to PUSCH transmissions in one or more time slots. For example, intra-slot frequency hopping may also be applied to repeated PUSCH transmissions. For PUSCH to which intra-slot frequency hopping is applied, the configuration may be switched according to one or more OFDM symbols. For example, for PUSCH to which intra-slot frequency hopping is applied, the configuration of the resource block may be switched to be the first hop or the second hop according to one or more OFDM symbols. In addition, in the case of performing intra-slot frequency hopping for PUSCH, the first hop and the second hop may be switched according to one or more OFDM symbols. The difference between the position of the starting resource block of the first hop and the position of the starting resource block of the second hop may be RB offset RB offsetIt can be set by upper layer parameters. The one or more OFDM symbols can be within a time slot. The one or more OFDM symbols can be half of the number of OFDM symbols used for PUSCH in a time slot. Intra-time slot frequency hopping can be applied to PUSCH corresponding to PUSCH repetition type A.

[0245] Inter-slot frequency hopping can be applied to PUSCH transmissions in multiple time slots. For PUSCH to which inter-slot frequency hopping is applied, the configuration of resource blocks can be switched per time slot. For example, inter-slot frequency hopping can be applied to repeated PUSCH transmissions. In addition, in the case of performing inter-slot frequency hopping for PUSCH, the configuration of resource blocks can be switched per time slot as to whether they are the first hop or the second hop. For example, in a certain time slot, the slot index n μ s,f When the timeslot index n is an even number, the PUSCH transmission in the certain time slot may correspond to the first hop. μ s,f When t is an odd number, the PUSCH transmission in the certain time slot may correspond to the second hop. Inter-slot frequency hopping may be applied to a PUSCH corresponding to either PUSCH repetition type A or PUSCH repetition type B.

[0246] Inter-repetition hopping may be applied to a PUSCH corresponding to PUSCH repetition type B. For a PUSCH to which inter-repetition hopping is applied, a first hop and a second hop may be switched based on a nominal repetition.

[0247] For PUSCH, at least two transmission methods may also be supported. For example, codebook transmission (Codebook-basedtransmission) may be one of the transmission methods for PUSCH. For example, non-codebook transmission (Non-codebook-based transmission) may also be one of the transmission methods for PUSCH. The upper-layer parameters may provide either codebook transmission or non-codebook transmission. For example, when "codebook" is set for the upper-layer parameters, the terminal device 1 may set the codebook transmission. For example, when "nonCodebook" is set for the upper-layer parameters, the terminal device 1 may set the non-codebook transmission. The upper-layer parameter may be txConfig. The upper-layer parameter may also be usage. For example, when the upper-layer parameters are not set, the terminal device 1 may not expect to be scheduled through any of DCI formats 0_1 and DCI formats 0_2. When PUSCH is scheduled through DCI format 0_0, the transmission of the PUSCH may be based on at least one antenna port.

[0248] In codebook transmission, PUSCH can be scheduled by DCI format. The DCI format can be any one of DCI format 0_0, DCI format 0_1 ​​and DCI format 0_2. In codebook transmission, PUSCH can be set to be transmitted semi-statically. Terminal device 1 can determine one or more precoders for PUSCH transmission. For example, the precoder can be determined based on at least part or all of SRI (SRS Resource indicator), TPMI (Transmitted Precoding Matrix Indicator) and transmission rank (Transmission rank or rank). For example, SRI can be provided by one or two DCI fields of SRS resource indicator (SRS resource indicator). For example, TPMI can be provided by one or two DCI fields of precoding information. For example, the transmission rank can be provided by the DCI field of the number of layers (number of transmission layers). For example, TPMI and transmission rank may be provided by one or two DCI fields of "precoding information and number of layers". SRI may be provided by a first upper layer parameter. TPMI and transmission rank may be provided by a second upper layer parameter. The first upper layer parameter may be srs-ResourceIndicator or srs-ResourceIndicator2. The second upper layer parameter may be precodingAndNumberOfLayers or precodingAndNumberOfLayers2.

[0249] The SRS resource set applied to the PUSCH may be determined based on an upper layer parameter. The PUSCH may be scheduled by DCI format 0_1 ​​or DCI format 0_2. The upper layer parameter may be srs-ResourceSetToAddModList or srs-ResourceSetToAddModeListDCI-0-2. The upper layer parameter may be an upper layer parameter set in SRS-Config.

[0250] When "codebook" is set for the upper layer parameter usage, one or two SRS resource sets may be set in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. The upper layer parameter usage may be set in the upper layer parameter SRS-ResourceSet.

[0251] In the case of setting an SRS resource set, the SRI and TPMI may be given by the DCI field. The DCI field may be an SRS resource indication and a DCI field of "precoding information and number of layers". TPMI may be used to indicate the precoder. The precoder may be applied across v layers {0...v-1}. In the case of setting multiple SRS resources, an SRS resource may be selected by SRI. The precoder may correspond to one SRS resource. The transmit precoder (precoder) may be selected from a codebook (uplink codebook). For example, a codebook may have the number of antenna ports. The number of antenna ports may be the same as the upper layer parameter nrofSRS-Ports. When the upper layer parameter txConfig is set to "codebook", the terminal device 1 may set at least one SRS resource. The indicated SRI may be associated with the transmission of the SRS resource determined by the SRI. For example, the indicated SRI may be associated with the most recent transmission of the SRS resource determined by the SRI, and the SRS resource may be before the PDCCH that transmits the SRI.

[0252] In the case of setting two SRS resource sets, one or two SRIs and one or two TPMIs may be given by the DCI field. For example, the DCI field may be one or both of the DCI field of the SRS resource indication and the DCI field of "precoding information and number of layers". The terminal device 1 may apply the indicated SRI and TPMI to one or more PUSCH repetitions. For example, the terminal device 1 may apply the indicated SRI and TPMI to one or more PUSCH repetitions according to the SRS resource set of the PUSCH repetition. Each TPMI may be used to indicate a precoder based on a code point indicated by the SRS resource set. The precoder may be applied to the 0th to v-1th layers. The precoder may correspond to the SRS resource selected by the SRI. Multiple SRS resources may be set for the applicable SRS resource set. For example, in the case of setting multiple SRS resources for the applied SRS resource set, the precoder may correspond to the SRS resource selected by the corresponding SRI. In one or two TPMIs, the transmitting precoder (precoder) may be selected from the codebook (uplink codebook). When indicating two SRIs, the terminal device 1 may expect the same number of antenna ports for the two indicated SRS resources. The number of antenna ports may be provided by an upper layer parameter. When two SRS resources are set, and when "codebook" is set for the upper layer parameter usage, the terminal device 1 may not expect different numbers of SRS resources to be set in the two SRS resource sets.

[0253] In codebook transmission, the terminal device 1 can determine a codebook subset. For example, the codebook subset can be determined based on at least TPMI. The codebook subset can be determined in response to the reception of a certain upper layer parameter. The certain upper layer parameter can be codebookSubset or codebookSubsetDCI-0-2. A certain upper layer parameter can be set to any one of "fullyAndPartialAndNonCoherent", "partialAndNonCoherent" and "nonCoherent". In the case where "fullpowerMode2" is set for the upper layer parameter ul-FullPowerTrasmission, and in the case where "partialAndNonCoherent" is set for a certain upper layer parameter, and in the case where the SRS resource set used for the codebook includes at least one SRS resource with four ports and at least one SRS resource with two ports, the codebook subset associated with the two-port SRS resource (SRS resource with two ports) can be "nonCoherent". The maximum transmission rank (or maximum rank) can be set for PUSCH by the upper layer parameter maxRank or the upper layer parameter maxRankDCI-0-2.

[0254] The terminal device 1 may include UE capability. When the terminal device 1 reports the UE capability transmitted by "partialAndNonCoherent", the terminal device 1 may not expect to set the codebook subset with "fullyAndPartialAndNonCoherent".

[0255] When the terminal device 1 reports the UE capability of "nonCoherent" transmission, the terminal device 1 may not expect to set a codebook subset with "fullyAndPartialAndNonCoherent" or "partialAndNonCoherent".

[0256] When the upper layer parameter nrofSRS-Ports for the codebook indicates that the maximum number of SRS antenna ports set is 2, the terminal device 1 may not expect to set the upper layer parameter set to "partialAndNonCoherent". The upper layer parameter may be codebookSubset or codebookSubsetForDCI-Format0-2. The number of antenna ports may be determined by the upper layer parameter nrofSRS-Ports.

[0257] In codebook transmission, one SRS resource can be determined from an SRS resource set based on SRI. Except for the case where "fullpowerMode2" is set for the first upper layer parameter, the maximum number of SRS resources set for codebook transmission can be 2. The first upper layer parameter may be ul-FullPowerTransmission. The DCI may indicate the transmission of SRS resources. For example, when aperiodic SRS is set, the SRS request field in the DCI may indicate (trigger) the transmission of aperiodic SRS resources. The terminal device 1 may also not expect the first upper layer parameter to be set to "fullpowerMode1" and the second upper layer parameter to be set to "fullAndPartialAndNonCoherent".

[0258] Terminal device 1 may transmit PUSCH using a DCI format or an antenna port that is the same as one or more SRS ports (antenna ports) in an SRS resource indicated by an upper layer parameter. For example, the SRS port may be the same as the antenna port used for PUSCH transmission. The DMRS antenna port may be determined according to the ordering of the DMRS ports.

[0259] When a plurality of SRS resources are set by an SRS resource set, the terminal device 1 may expect that a higher-layer parameter nrofSRS-Ports having the same value is set for these SRS resources. The SRS resource set may be a higher-layer parameter SRS-ResourceSet with a higher-layer parameter usage in which "codebook" is set.

[0260] When "fullpowerMode2" is set for the upper-layer parameter, one or more SRS resources with the same or different number of SRS ports can be set in the SRS resource set for the codebook. When "fullpowerMode2" is set for the upper-layer parameter, and when multiple SRS resource sets are set in the SRS resource set, up to two different spatial relations (spatialrelations) can be set for all SRS resources in the SRS resource set for the codebook. When "fullpowerMode2" is set for the upper-layer parameter, up to two or four SRS resources can be set in the SRS resource set for the codebook. In addition, up to eight SRS resources can also be set in one SRS resource set. The SRS resource set for the codebook may be an SRS resource set with the upper-layer parameter usage set to which "codebook" is set.

[0261] In non-codebook transmission, PUSCH can be scheduled by DCI format 0_0, DCI format 0_1 ​​or DCI format 0_2. In non-codebook transmission, PUSCH can be set semi-statically. Terminal device 1 can determine the precoder and transmission rank of PUSCH based on SRI. For example, when setting multiple SRS resources, SRI can be given by one or two SRS resource indications in DCI. For example, SRI can be given by upper layer parameters. The SRS resource set applied to PUSCH can be defined by the entry of the upper layer parameter. The upper layer parameter can be srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2.

[0262] The terminal device 1 can use one or more SRS resources for SRS transmission. The maximum number of SRS resources in an SRS resource set can be sent to the base station device 3 as a UE capability. SRS resources can be set for simultaneous transmission in the same OFDM symbol. In an SRS resource set, there may be the maximum number of SRS resources set for simultaneous transmission in the same OFDM symbol, the maximum number of SRS resources, and the UE capability. Multiple SRS resources sent simultaneously may occupy the same resource block. An SRS port may be set in each SRS resource. One or two SRS resource sets may be set in the upper-layer parameter srs-ResourceSetToAddModList accompanied by the upper-layer parameter usage in which "nonCodebook" is set in the upper-layer parameter SRS-ResourceSet. In the case where two SRS resource sets are set, one or two SRIs may be given by the DCI field. The DCI field may be a DCI field indicated by two SRS resources.

[0263] The terminal device 1 may apply the indicated SRI to one or more PUSCH repetitions. For example, the terminal device 1 may apply the indicated SRI to one or more PUSCH repetitions according to the SRS resource sets of the PUSCH repetitions. The maximum number of SRS resources for each SRS resource set set for non-codebook transmission may be 4. The maximum number of SRS resources for each SRS resource set set for non-codebook transmission may be 8. The indicated one or two SRIs may be associated with the latest transmission of the SRS resources of the SRS resource set identified by the SRI, respectively. The SRS transmission may be before the PDCCH that conveys the SRI. The terminal device 1 may also not expect to set different numbers of SRS resources in the two SRS resource sets.

[0264] When multiple PDCCH candidates (PDCCH candidate(s)) are associated with a search region set configured by a higher layer parameter, one PDCCH candidate is used. The one PDCCH candidate may be the earlier started PDCCH candidate of the two PDCCH candidates. The higher layer parameter may be searchSpaceLinking.

[0265] In non-codebook transmission, the UE may calculate a precoder. For example, the precoder for SRS transmission may be calculated based on a measurement of the NZP CSI-RS resource. An NZP CSI-RS resource may be set for an SRS resource set for non-codebook. For example, an SRS resource set for non-codebook may be an SRS resource set with an upper layer parameter set to "nonCodebook".

[0266] In the case of setting an aperiodic SRS resource set, the NZP-CSI RS may be indicated via the SRS request field. The SRS request field may be one of the DCI fields in any one of DCI formats 0_1, DCI format 0_2, DCI format 1_1, and DCI format 1_2. The first upper layer parameter may indicate the association between an aperiodic SRS (aperiodic SRS triggering state) and an SRS resource set. The first upper layer parameter, the SRS resource to be triggered, the srs-ResourceSetId, and the csi-RS may be set in the upper layer parameter SRS-ResourceSet. The upper layer parameter csi-RS may indicate the NZP-CSI-RS-ResourceId. The upper layer parameter SRS-ResourceSet associated with the SRS request may be defined by an entry in a list as an upper layer parameter. The list as an upper layer parameter may be an upper layer parameter srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. Terminal device 1 may not expect to update precoding information (SRS precoding information). For example, when the interval from the last OFDM symbol of the reception of the non-periodic NZP-CSI-RS resource to the first OFDM symbol of the non-periodic SRS transmission is less than 42 OFDM symbols, terminal device 1 may not expect to update precoding information.

[0267] In the case of setting an aperiodic SRS associated with an aperiodic NZP CSI-RS resource, the presence of the associated CSI-RS can be indicated by the SRS request field. In the case where the value of the SRS request field is not "00", and in the case where the scheduling DCI is not used for cross carrier scheduling or cross BWP scheduling (cross bandwidth partscheduling), the presence of CSI-RS can be indicated by the SRS request field.

[0268] When a periodic or semi-persistent SRS resource set is set, the NZP-CSI-RS-ResourceId used for measurement may be indicated via the upper layer parameter associatedCSI-RS.

[0269] The terminal device 1 can perform a one-to-one mapping. The one-to-one mapping can be a mapping from SRI to a DMRS port and a mapping from SRI to a corresponding PUSCH layer {0...v-1}. 0 to v-1 PUSCH layers can be given. v can be the number of layers. The number of layers can be set by upper layer parameters. The terminal device 1 can use the same antenna port as the SRS port to send PUSCH. For example, the SRS port in the SRS resource indicated by SRI can be additionally indexed as pi=1000+i. For example, the SRS port in the (i+1)th SRS resource can be pi. In addition, the SRS port in the (i+1)th SRS resource can be additionally indexed as pi. pi can be 1000+i.

[0270] In non-codebook transmission, the terminal device 1 may not expect to set both the spatial relation information (Spatial relation information (info)) for the SRS resource and the upper-layer parameter associatedCSI-RS in the upper-layer parameter SRS-ResourceSet for the SRS resource set. The spatial relationship information can be determined by the upper-layer parameter. The spatial relationship information can be the upper-layer parameter spatialRelationInfo. In non-codebook transmission, when at least one SRS resource is set in the SRS resource set with the upper-layer parameter set to "nonCodebook", the terminal device 1 can perform scheduling through DCI format 0_1 ​​or DCI format 0_2.

[0271] One or more SRS resource sets (Sounding Reference Signal resource set) can be set by a first upper layer parameter. The first upper layer parameter can be SRS-ResourceSet or SRS-PosResourceSet. In each SRS resource set, K SRS resources can be set. K can be an integer greater than 1. The maximum value of K can be represented by UE capabilities. The maximum value of K can be 16. The adaptability of the SRS resource set can be set in a second upper layer parameter. The second upper layer parameter can be usage. For example, when "beamManagement" is set to the second upper layer parameter, one SRS resource in each of one or more SRS resource sets can be sent in a given time instance. Multiple SRS resources in different SRS resource sets can be sent simultaneously. For example, multiple SRS resources with the same time domain behavior can be sent simultaneously in different SRS resource sets of the same BWP.

[0272] In the non-periodic SRS, at least one DCI field may be used to select at least one from the set SRS resource set.

[0273] One or more SRS parameters may be set by a first upper layer parameter. For example, one or more SRS parameters may be set semi-statically by a second upper layer parameter. The first upper layer parameter may be SRS-Resource or SRS-PosResource. The second upper layer parameter may determine the SRS resource configuration identity. The second upper layer parameter. It may be srs-ResourceId or SRS-PosResourceId. One or more SRS parameters may be part or all of the first to twentieth upper layer parameters. One or more SRS parameters may include parameters having the same function as part or all of the first to twentieth upper layer parameters. One or more SRS parameters may be determined based on the DCI format.

[0274] The number of SRS ports N SRS apIt can be determined by a third upper layer parameter. The third upper layer parameter may be nrofSRS-Ports. The SRS port may be an antenna port. For example, the SRS port may be an antenna port for SRS. The time domain behavior of the SRS resource setting may be determined by a fourth upper layer parameter. The fourth upper layer parameter may be resourceType. For example, the time domain behavior may be any one of periodic, semi-persistent, and aperiodic. The period and offset may be determined by a fifth upper layer parameter. The period and offset may be slot-level. The period and offset may be defined for a periodic SRS resource or a semi-persistent SRS resource. The fifth upper layer parameter may be periodicityAndOffset-p or periodicityAndOffset-sp. For example, it may not be expected that multiple SRS resources with different periods are set in the same SRS resource set. In the case where "aperiodic" is set for the fourth upper layer parameter, the slot-level offset may be defined by a sixth upper layer parameter. The sixth upper layer parameter may be slotOffset. When the fourth upper layer parameter is set to "aperiodic", the list of available slot offset values ​​may be defined by the seventh upper layer parameter. The seventh upper layer parameter may be AvailableSlotOffset. The list of available slot offset values ​​may be a list of 0 to 4 different available slot offset values. When the reference slot is n+k, the available slot offset may be an offset from the n+k slot to a certain slot. A non-periodic SRS resource set may be sent in a certain slot. Slot n may be the slot of the DCI to be triggered. The DCI to be triggered may trigger the sending of a non-periodic SRS. Slot k may be determined by the sixth upper layer parameter. The seventh upper layer parameter may be set to up to four values. In the non-periodic SRS resource set, the slot-level offset may be defined by the sixth upper layer parameter for each SRS resource.

[0275] Furthermore, the number of OFDM symbols in the SRS resource (the number of consecutive OFDM symbols) N SRS symb The starting OFDM symbol (the starting position in the time domain) of the SRS resource may be defined by an eighth upper layer parameter. The eighth upper layer parameter may be resourceMapping. In addition, the number of repetitions (repetition factor: repetition factor) R facIt can be set by the eighth upper layer parameter. In the case where the number of repetitions is not set by the eighth upper layer parameter, the number of repetitions can be the same as the number of OFDM symbols in the SRS resource. SRS and C SRS It can be defined by the ninth upper layer parameter. In the case where the ninth upper layer parameter is not set, B SRS The ninth upper layer parameter may be freqHopping. The partial frequency sounding factor and the starting resource block index for partial frequency sounding may be defined by the tenth upper layer parameter. The tenth upper layer parameter may be FreqScalingFactor and StartRBIndex. The frequency domain position may be defined by the eleventh upper layer parameter. The settable shift may be defined by the twelfth upper layer parameter. The eleventh upper layer parameter may be freqDomainPosition. The twelfth upper layer parameter may be freqDomainShift.

[0276] The first number of OFDM symbols may be set by an eighth upper layer parameter. The second number of OFDM symbols may be determined based on the DCI format. When the first number of OFDM symbols is set, and when the second number of OFDM symbols is given, the number of OFDM symbols in the SRS resource may correspond to the second number of OFDM symbols.

[0277] The first number of repetitions may be set by an eighth upper layer parameter. The second number of repetitions may be determined based on the DCI format. When the first number of repetitions is set and the second number of repetitions is determined, the second number of repetitions may be used and the first number of repetitions may not be used.

[0278] Moreover, the number of intervals (number of transmission intervals) may be defined by a thirteenth upper layer parameter. The thirteenth upper layer parameter may be transmissionComb. The number of intervals may be any one of 2, 4, 8, and 16. The cyclic shift (cyclic shift initial value) may be defined by a fourteenth upper layer parameter. The fourteenth upper layer parameter may be any one of cyclicShift-n2, cyclicShift-n4, cyclicShift-n8, and cyclicShift-n16. The fourteenth upper layer parameter may be included in the thirteenth upper layer parameter. The interval offset (transmission interval offset) may be defined by a fifteenth upper layer parameter. The fifteenth upper layer parameter may be any one of combOffset-n2, combOffset-n4, combOffset-n8, and combOffset-n16. The fifteenth upper layer parameter may be included in the thirteenth upper layer parameter. The SRS sequence ID may be defined by a sixteenth upper layer parameter. The sixteenth upper layer parameter may be sequenceId.

[0279] The first cyclic shift (or cyclic shift initial value) may be set by a fourteenth upper layer parameter. The second cyclic shift (or cyclic shift initial value) may be determined based on the DCI format. In the case of setting the first cyclic shift initial value, and in the case of determining the second cyclic shift initial value, the second cyclic shift initial value may be used, and the first cyclic shift initial value may not be used. In the case of setting the first cyclic shift initial value, and in the case of determining the second cyclic shift initial value, the sum of the first cyclic shift initial value and the second cyclic shift initial value may be used.

[0280] The third cyclic shift (or cyclic shift initial value) may be determined based on one or more values. One of the one or more values ​​may be the number of OFDM symbols in the SRS resource (the number of OFDM symbols constituting the SRS resource). One of the one or more values ​​may be the number of repetitions (the number of repetitions for the SRS). One of the one or more values ​​may also be the maximum number of cyclic shifts. That is, the third cyclic shift (or cyclic shift initial value) may be determined based on part or all of the number of OFDM symbols in the SRS resource, the number of repetitions, and the maximum number of cyclic shifts.

[0281] In the case of setting the first cyclic shift initial value, and in the case of determining the third cyclic shift initial value, the third cyclic shift initial value may be used, and the first cyclic shift initial value may not be used. In the case of setting the first cyclic shift initial value, and in the case of determining the third cyclic shift initial value, the sum of the first cyclic shift initial value and the third cyclic shift initial value may be used.

[0282] The first SRS sequence ID may be set by a sixteenth upper layer parameter. The second SRS sequence ID may be determined based on the DCI format. In the case of setting the first SRS sequence ID, and in the case of determining the second SRS sequence ID, the second SRS sequence ID may be used, and the first SRS sequence ID may not be used. In the case of setting the first SRS sequence ID, and in the case of determining the second SRS sequence ID, the sum of the first SRS sequence ID and the second SRS sequence ID may be used.

[0283] The third SRS sequence ID may be determined based on part or all of the number of OFDM symbols in the SRS resource, the number of repetitions, and the maximum number of cyclic shifts. In the case where the first SRS sequence ID is set and the third SRS sequence ID is determined, the third SRS sequence ID may be used and the first SRS sequence ID may not be used. In the case where the first SRS sequence ID is set and the third SRS sequence ID is determined, the sum of the first SRS sequence ID and the third SRS sequence ID may be used.

[0284] Moreover, the spatial relation between the reference signal (RS) and the SRS can be defined by the seventeenth upper layer parameter. For example, the spatial relation between the reference reference signal (referenceRS (reference signal)) and the target SRS (target SRS) can be set by the seventeenth upper layer parameter. The seventeenth upper layer parameter can be spatialRelationInfo or spatialRelationInfoPos. The setting of the spatial relationship may include the ID of the reference signal (reference reference signal). The reference signal may be an SS / PBCH block. The reference signal may also be a CSI-RS. The reference signal may also be a certain SRS. The reference signal may be set in a serving cell. For example, a serving cell may be indicated by the eighteenth upper layer parameter. A certain SRS may be set in a BWP in a serving cell. For example, a serving cell may be the same serving cell as the target SRS. For example, a BWP may be set by the nineteenth upper layer parameter. The eighteenth upper layer parameter may be servingCellId. The nineteenth upper layer parameter may be uplinkBWP. One or more SRS parameters may be set by the first upper layer parameter. For example, the first upper layer parameter may be SRS-Resource or SRS-PosResource.

[0285] When the twentieth upper parameter is not set, the number of intervals may be any one of 2, 4, and 8. When the twentieth upper parameter is set, the number of intervals may be any one of 2, 4, 8, and 16. When the twentieth upper parameter is not set, the fourteenth upper parameter may be any one of cyclicShift-n2, cyclicShift-n4, and cyclicShift-n8. When the twentieth upper parameter is set, the fourteenth upper parameter may be any one of cyclicShift-n2, cyclicShift-n4, cyclicShift-n8, and cyclicShift-n16.

[0286] The one or more SRS parameters may include part or all of the second upper layer parameter to the twentieth upper layer parameter. Sending SRS may be sending SRS resources. Sending SRS may also be sending SRS resource sets. SRS sending may also be SRS resource sending. SRS sending may also be SRS resource sending.

[0287] The SRS resource may occupy one or more OFDM symbols. For example, the SRS resource may occupy N of the six OFDM symbols at the end of a time slot. SRS symb OFDM symbols. N SRS symb It can be any one of 1, 2, and 4. For example, the SRS resource can occupy any one of the OFDM symbol positions in a time slot. For example, the SRS resource can also occupy N in a time slot. SRS symb N contiguous OFDM symbols. SRS ap The antenna ports can be mapped to each OFDM symbol of the resource. SRS ap It can be 4 or 8. For example, N of SRS resources SRS ap The antenna ports can be mapped to each OFDM symbol of the resource. SRS symb It can be any one of 1, 2, 4, 8, or 12. SRS symb It can be any one of 1, 2, 4, 8, 10, 12, 14. SRS ap When N is 8, SRS symb Can be an even number. For example, N SRS ap,1 antenna ports can be mapped to time slots with an even number of time slot indices. SRSap,2 N antenna ports can be mapped to slots with odd-numbered slot indices. SRS ap Can be N SRS ap,1 +N SRS ap,2 .

[0288] When PUSCH and SRS are transmitted in the same time slot, SRS may be set to be transmitted after PUSCH transmission. For example, when PUSCH and SRS are transmitted in one time slot in one serving cell, SRS may be set to be transmitted after DMRS corresponding to PUSCH is transmitted.

[0289] In the case where PUSCH transmission or PUCCH transmission overlaps with SRS transmission, SRS may not be transmitted in the repeated OFDM symbols. For example, in a serving cell, in the case where PUSCH transmission or PUCCH transmission overlaps with SRS transmission in the time domain, SRS may not be transmitted in the repeated OFDM symbols. In addition, in the case where PUSCH transmission or PUCCH transmission overlaps with SRS transmission, SRS may not be transmitted. For example, in N SRS ap When N is 8, and when PUSCH transmission or PUCCH transmission overlaps with SRS, SRS may not be transmitted. SRS ap When the OFDM symbol set is 8 and the PUSCH transmission or PUCCH transmission overlaps with the SRS, the SRS may not be transmitted in the repeated OFDM symbol set. The OFDM symbol set may consist of two OFDM symbols.

[0290] When "periodic" is set for the upper layer parameter resourceType, a target SRS resource (SRS resource) with a spatial domain transmission filter can be sent. When a certain upper layer parameter includes an ID, a target SRS resource with a spatial area filter can be sent. A spatial area filter can be used for receiving or sending a reference reference signal (reference signal). The reference reference signal can be an SS / PBCH block, a CSI-RS, or a certain SRS. For example, when a certain upper layer parameter includes any one of the IDs "ssb-Index", "ssb-IndexServing" and "ssb-IndexNcell", the reference reference signal can be an SS / PBCH block. For example, when a certain upper layer parameter includes any one of the IDs "csi-RS-Index" and "csi-RS-IndexServing", the reference reference signal can be a periodic CSI-RS (periodic CSI-RS) or a semi-persistent CSI-RS (semi-persistent CSI-RS). For example, when a certain higher layer parameter includes any one ID of "srs" and "srs-spatialRelation", the reference reference signal may be a periodic SRS (periodicSRS). The reference reference signal may be a DL PRS.

[0291] When the upper layer parameter resourceType is set to "semi-persistent", the first time slot (n+3N subframe，μ slotSRS transmission starts from the first time slot after the first time slot of the PUCCH. For example, the assumption in SRS transmission can be applied from the first time slot. Time slot n can be a time slot in which PUCCH is transmitted. For example, PUCCH can have HARQ-ACK information corresponding to the PDSCH that conveys the activation command. That is, in the case of receiving the activation command, SRS transmission can be started from the first time slot. In addition, in the case of receiving the activation command, the assumption in SRS transmission can also be applied from the first time slot. The activation command may include an assumption of a spatial relationship (or spatial relationship). The assumption of a spatial relationship can be provided by a list. The list can be a list of reference signal IDs. For example, the reference signal ID can refer to any one of the SS / PBCH blocks, NZP CSI-RS resources and SRS resources respectively. NZP CSI-RS resources can be set in a service cell. SRS resources can be set in a service cell and an uplink BWP. For example, a service cell can be indicated by the first field in the activation command. For example, an uplink BWP can be indicated by the second field in the activation command. The first field may be a Resource Serving Cell ID field. The second field may be a Resource BWP ID field. For example, a serving cell may be the same serving cell as the SRS resource set. For example, an uplink BWP may be the same uplink BWP as the SRS resource set.

[0292] In the case where one SRS resource in the SRS resource set (resource set) to be activated is set by an upper layer parameter, it can be assumed that the ID of the first reference signal in the activation command overwrites the ID of the second reference signal in the upper layer parameter. The upper layer parameter may be spatialRelationInfo or spatialRelationInfoPos.

[0293] In the case of receiving a deactivation command and in the case of sending a PUCCH in time slot n, the stop of SRS transmission may be applied starting from the first time slot. The deactivation command may be delivered via the PDSCH. The PUCCH may include HARQ-ACK information corresponding to the PDSCH. The stop of SRS transmission corresponding to the SRS resource set to be deactivated may be applied starting from the first time slot. The first time slot may be n+3N subframe,μ slot μ may be the SCS setting for PUCCH.

[0294] In the case where the terminal device 1 has an active semi-persistent SRS resource configuration and does not receive a deactivation command, the semi-persistent SRS resource configuration can be considered to be active in an uplink BWP. An uplink BWP can be valid. In addition, in the case where the terminal device 1 has an active semi-persistent SRS resource configuration and receives a deactivation command, the semi-persistent SRS resource configuration can be suspended.

[0295] When "aperiodic" is set for the upper layer parameter resourceType, part or all of Action 1 to Action 7 may be applied.

[0296] Action 1 may be receiving a configuration of one or more SRS resource sets.

[0297] Action 2 may be receiving a command. A command may be a command based on a downlink DCI. A command may also be a command based on a group common DCI. A command may also be a command based on an uplink DCI. The minimum time interval may be N2 OFDM symbols and an additional time period T. switch The minimum time interval may also be the minimum time interval from the last OFDM symbol of the PDCCH that triggers the non-periodic SRS transmission to the first OFDM symbol of the SRS resource. The minimum time interval may also be N2+14 OFDM symbols and the additional time period T switch The minimum time interval may be determined based on at least the minimum SCS. The minimum SCS may be the smallest SCS among the SCSs of the PDCCH, the first uplink carrier, the second uplink carrier, and the SRS. The additional time period T switch Can be 0.

[0298] Action 3 may be to trigger aperiodic SRS without data and CSI. For example, DCI format 0_1 ​​and DCI format 0_2 may trigger aperiodic SRS. Aperiodic SRS may also not include data and CSI.

[0299] In action 4, the terminal device 1 may send an SRS in each of one or more SRS resource sets and in the t+1th available time slot. The SRS may be a non-periodic SRS. One or more SRS resource sets may be triggered by a DCI. A DCI triggering a non-periodic SRS may be received in a first time slot n. At least one resource set (SRS resource set) may be set by an upper layer parameter availableSlotOffset. Available time slots may be counted from a second time slot. The second time slot may be determined based at least on the first time slot and an offset value (time slot k). The offset value may be set by a second upper layer parameter. The second upper layer parameter may be slotOffset. A second upper layer parameter may be set for each of one or more SRS resource sets to be triggered. Available time slots may be time slots that satisfy a condition. The condition may be the presence of UL symbols or variable symbols for a time domain position corresponding to multiple SRS resources in a resource set (SRS resource set). The condition may be a UEcapability that satisfies a minimum timing request. The minimum timing request may be the minimum timing request between the PDCCH to be triggered and all SRS resources in a resource set. From the first OFDM symbol of the DCI that conveys the SRS request to the OFDM symbol at the end of the SRS resource set to be triggered, the terminal device 1 may not expect to receive the SFI indication in the variable symbol, the UL cancellation indication, and the dynamic scheduling of the downlink channel / signal. From the first OFDM symbol of the DCI that conveys the SRS request to the OFDM symbol at the end of the SRS resource set to be triggered, the terminal device 1 may not expect to change the determination of the available time slot. The t may be set by a third upper layer parameter. The third upper layer parameter may be availableSlotOffset. For example, t may be set to a maximum of four values ​​for each of one or more SRS resource sets to be triggered. t may be based on the subcarrier spacing (subcarrier spacing) of the SRS to be triggered. In an SRS resource set where the third upper layer parameter is not set, t may be 0.

[0300] Action 5 may be to send an SRS in each of one or more SRS resource sets and in a first time slot. The SRS may be an aperiodic SRS. A DCI triggering an aperiodic SRS may be received in time slot n. There may also be no resource set (SRS resource set) for setting a first upper layer parameter. A second upper layer parameter may also be set. The second upper layer parameter may be ca-SlotOffset. The first time slot may be determined based on at least time slot n and time slot k.

[0301] Action 6 may be to send the target SRS resource with a spatial region filter.

[0302] Action 7 may be to apply the update of the spatial relationship for one SRS resource to the SRS transmission. The SRS transmission may be from n+3N subframe,μ slot Time slot n starts from the first time slot after time slots. μ can be the SCS setting of PUCCH. The update command can be transmitted through PDSCH. HARQ-ACK corresponding to PDSCH can be sent in time slot n. An SRS resource can be set by the upper layer parameter SRS-Resource. Terminal device 1 can receive an update command (spatial relation update command: spatial relationship update command). The update command may include an assumption of a spatial relationship. The assumption of a spatial relationship may be provided by a list. The list may be a list of references to one or more reference signal IDs.

[0303] Setting the upper layer parameter resourceType to "aperiodic" can mean that the SRS resource corresponds to the aperiodic SRS (aperiodic). Setting the upper layer parameter resourceType to "semi-persistent" can mean that the SRS resource corresponds to the semi-persistent SRS (semi-persistent). Setting the upper layer parameter resourceType to "periodic" can mean that the SRS resource corresponds to the periodic SRS (periodic).

[0304] It is also possible not to expect that the time domain behavior corresponding to one or more SRS resources in an SRS resource set is different. For example, it is also possible not to expect that different time domain behaviors are set for one or more SRS resources in an SRS resource set. It is also possible not to expect that different time domain behaviors are set between SRS resource sets associated with SRS resources.

[0305] It is also possible not to expect to set one or more OFDM symbols in one carrier to overlap with the first SRS resource and the second SRS resource. For example, the first SRS resource can be set by the upper layer parameter SRS-PosResource. The second SRS resource can be set by the upper layer parameter SRS-Resource. The resourceType of both the first SRS resource and the second SRS resource can be "periodic".

[0306] It is also possible not to expect that the transmission of the first SRS will be triggered or activated. For example, the first SRS may be an SRS in one or more OFDM symbols. One or more OFDM symbols may overlap with the first SRS resource and the second SRS resource. For example, the first SRS resource may be set by the upper layer parameter SRS-PosResource. The second SRS resource may be set by the upper layer parameter SRS-Resource. The resourceType of both the first SRS resource and the second SRS resource may be "semi-persistent" or "aperiodic".

[0307] It is not necessary to set a plurality of OFDM symbols overlapping with a plurality of SRS resources in one carrier. The plurality of SRS resources can be set by an upper layer parameter SRS-PosResource whose resourceType of the plurality of SRS resources is "periodic".

[0308] It is also possible not to expect to trigger or activate the transmission of SRS in multiple OFDM symbols in one carrier. The multiple OFDM symbols may be OFDM symbols that overlap with multiple SRS resources. The multiple SRS resources may be set by the upper layer parameter SRS-PosResource with the resourceType of the multiple SRS resources being "semi-persistent" or "aperiodic".

[0309] In the PUCCH and SRS in one carrier, when the first SRS is set, the terminal device 1 may not send the SRS. The first SRS may be set in the same OFDM symbol as the PUCCH. The PUCCH may only transmit the CSI report. The PUCCH may also only transmit the L1-RSRP report. The PUCCH may also only transmit the L1-SINR report. When setting or triggering the transmission of the second SRS, the terminal device 1 may also send the SRS. The second SRS may be any one of a semi-persistent SRS and a periodic SRS set to be sent in the same OFDM symbol as the PUCCH. The second SRS may be a non-periodic SRS triggered to be sent in the same OFDM symbol as the PUCCH. The PUCCH may transmit part or all of the HARQ-ACK, link recovery request, and scheduling request (Scheduling request: SR). In the case where the SRS is not sent due to duplication with the PUCCH, only the SRS symbols that are repeated with the PUCCH symbols may be discarded. In addition, in N SRS apWhen the SRS symbol is 8, the SRS symbol that overlaps with the PUCCH symbol and the SRS symbol that does not overlap with the PUCCH symbol may be discarded. In the case where the transmission of the aperiodic SRS is triggered due to overlap with the PUCCH, the PUCCH may not be transmitted.

[0310] When an SRS resource corresponding to the resourceType set to "aperiodic" is triggered in one or more OFDM symbols in which periodic or semi-persistent SRS transmission is set, the terminal device 1 may transmit an aperiodic SRS resource or discard the periodic or semi-persistent SRS in the repeated OFDM symbols. It may also transmit the periodic or semi-persistent SRS in the non-repeated OFDM symbols. SRS ap When N is 8, the periodic or semi-persistent SRS in non-repeating OFDM symbols may be discarded. Discarding may also be not sending. When the SRS resource corresponding to the resourceType setting "semi-persistent" is triggered in one or more OFDM symbols in which periodic SRS transmission is set, the terminal device 1 may send the semi-persistent SRS resource or discard the periodic SRS in the repeated OFDM symbols. It is also possible to send the periodic SRS in non-repeating OFDM symbols. SRS ap When the value is 8, the periodic or semi-persistent SRS in the repeated OFDM symbol set can also be discarded.

[0311] In the case where a spatial relationship (spatialRelationInfo) is activated or updated for a first SRS resource, a spatial relationship may be applied to a second SRS resource. The first SRS resource may be a semi-persistent SRS resource or an aperiodic SRS resource. The second SRS resource may be a semi-persistent SRS resource or an aperiodic SRS resource having the same SRS resource ID. The second SRS resource may be a semi-persistent SRS resource or an aperiodic SRS resource having the same SRS resource ID for all BWPs in the determined multiple CCs. The first SRS resource may be set by an upper layer parameter. The spatial relationship may be activated or updated by a MAC CE for a set of multiple CCs (component carriers) or / and multiple BWPs. The list of multiple CCs may be set by an upper layer parameter. The upper layer parameter may be simultaneousSpatial-UpdatedList 1 or simultaneousSpatial-UpdatedList2.

[0312] The repetition factor R can be set for an SRS resource. facThe number of repetitions can be set by an upper layer parameter. The number of repetitions can be any one of 1, 2, and 4. The number of repetitions can also be any one of 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, and 14. The number of repetitions Rfac can also be set by the upper layer parameter resourceMapping in the upper layer parameter SRS-Resource. The number of repetitions R fac It can be determined based on the DCI format. The number of repetitions can be N SRS symb the following.

[0313] Number of repetitions and N SRS symb The same can also be done without setting the frequency hopping. SRS symb The same may also be that one or both of cyclic shift hopping and sequence hopping are not set. Each of the multiple antenna ports of an SRS resource can be mapped to the first set. For example, when frequency hopping is not set, each of the multiple antenna ports of an SRS resource in each time slot can be mapped to the first set in all N SRS symb OFDM symbols are mapped to the first set. The first set may be a set of one or more subcarriers. The first set may also be a set of one or more subcarriers in the second set. The second set may be a set of one or more PRBs. For example, when frequency hopping is not set in an SRS resource in each time slot, each of the multiple antenna ports of an SRS resource in each time slot may be mapped to the first set in all N OFDM symbols. SRS symb OFDM symbols are mapped to the first set.

[0314] The first one or more antenna ports may correspond to the first CS (Cyclic shift) set. For example, in the case where cyclic shift hopping is not configured, the first one or more antenna ports in each time slot may correspond to the first CS (Cyclic shift) set. SR Ssymb OFDM symbols corresponding to the first CS set. The first CS set may be a set of cyclic shifts αi corresponding to the first one or more antenna ports pi. For example, when cyclic shift hopping is not set in one SRS resource in each time slot, the first one or more antenna ports in each time slot may be in all N SRS symb OFDM symbols correspond to the first CS set.

[0315] Furthermore, when frequency hopping is set within one SRS resource in each time slot and there is no repetition (the number of repetitions is 1), each of the antenna ports of one SRS resource in each time slot can be mapped to a different set in each OFDM symbol. A set can be a set of one or more subcarriers. The same number of intervals (transmission comb value) can be assumed for different sets.

[0316] Furthermore, when cyclic shift hopping is set in one SRS resource in each time slot, and there is no repetition (the number of repetitions is 1), the first one or more antenna ports in each time slot can be mapped to different CS sets in each OFDM symbol. The CS set can be a set of cyclic shifts αi corresponding to the first one or more antenna ports pi. The same number of intervals (transmission comb value) can be assumed for different CS sets.

[0317] In the case of setting frequency hopping and repetition, each of the one or more antenna ports of one SRS resource may be mapped to a subcarrier included in an n-th subcarrier set in an OFDM symbol included in an n-th OFDM symbol set. fac contiguous OFDM symbol pairs. fac It can be the number of repetitions. The nth subcarrier set can be composed of one or more subcarriers. n can be a large integer greater than 1. For example, n can be N SRS symb / R fac The nth subcarrier set may be composed of one or more subcarriers different from the subcarrier sets other than the nth subcarrier set. When frequency hopping and repetition are set in one SRS resource in each time slot, each of the antenna ports of one SRS resource in each time slot may be fac Each of the OFDM symbol pairs is mapped to the same subcarrier set, or frequency hopping is performed between the two pairs according to the SRS frequency hopping mode. Frequency hopping can be applied frequency hopping, executed frequency hopping, or set frequency hopping according to the SRS frequency hopping mode.

[0318] In the case of setting cyclic shift hopping and repetition, one or more antenna ports (SRS ports) may correspond to the nth cyclic shift in the OFDM symbols included in the nth OFDM symbol set. fac contiguous OFDM symbol pairs. fac It can be the number of repetitions. The nth cyclic shift can be the nth CS set. n can be a large integer greater than 1. For example, the maximum number of n can be N SRS symb / Rfac When cyclic shift hopping and repetition are set in one SRS resource in each time slot, the antenna port of one SRS resource in each time slot can be fac The OFDM symbol pair may correspond to the same cyclic shift, or the cyclic shift hopping may be performed between the two pairs according to the cyclic shift hopping mode. The cyclic shift hopping may be applied cyclic shift hopping, performed cyclic shift hopping, or set cyclic shift hopping according to the cyclic shift hopping mode. Whether to apply cyclic shift hopping can be set by upper layer parameters.

[0319] When the number of antenna ports is 8, N SRS symb / R fac It can be an even number. When the number of antenna ports is 8, N SRS symb / R fac It can be more than 2. When the number of antenna ports is 8, a first antenna port set and a second antenna port set can be determined. The antenna port set can be composed of four antenna ports. The first subcarrier set mapping the first antenna port set in the first OFDM symbol can be the same as the second subcarrier set mapping the second antenna port set in the second OFDM symbol. The first OFDM symbol can be different from the second OFDM symbol. When the number of antenna ports is 8, cyclic shift hopping can be applied.

[0320] For example, the antenna ports included in the first antenna port set of an SRS resource can be respectively mapped to the first subcarrier set in the first OFDM symbol included in the first OFDM symbol set. The antenna ports included in the second antenna port set can be respectively mapped to the first subcarrier set in the second OFDM symbol included in the first OFDM symbol set. The antenna ports included in the first antenna port set can be respectively mapped to the second subcarrier set in the first OFDM symbol included in the second OFDM symbol set. The antenna ports included in the second antenna port set can be respectively mapped to the second subcarrier set in the second OFDM symbol included in the second OFDM symbol set. Switching the mapping from the first subcarrier set to the second subcarrier set can also be called frequency hopping. That is, when the number of antenna ports is 8, it can be switched every N. SRS symb / R fac Frequency hopping is applied to OFDM symbols. An OFDM symbol set may consist of more than two OFDM symbols. A subcarrier set may consist of one or more subcarriers. An antenna port set may consist of four antenna ports.

[0321] For example, when the number of antenna ports is less than 4, the first frequency hopping frequency (first SRS frequency hopping pattern) may be applied. When the number of antenna ports is 8, the second frequency hopping frequency (second SRS frequency hopping pattern) may be applied. The first SRS frequency hopping pattern may be different from the second SRS frequency hopping pattern.

[0322] A non-periodic SRS resource with frequency hopping in a time slot can be set within a BWP. When the number of repetitions is 1 and frequency hopping is set, SRS symb The full hopping bandwidth can be sounded in equal-size subbands within two symbols. The full hopping bandwidth can also be sounded in equal-size subbands within two pairs. The two pairs can be respectively represented by R fac Each of the antenna ports of the SRS resource can be mapped to the same subcarrier set in each OFDM symbol set. The OFDM symbol set can be R fac A subcarrier set can be a set of one or more subcarriers. fac A pair of adjacent OFDM symbols may be OFDM symbols of the resource.

[0323] Periodic or semi-persistent SRS resources with inter-slot or intra-slot frequency hopping can be set within a BWP. SRS resources can occupy the same OFDM symbol position in each time slot. SRS resources of N symbols can occupy the same OFDM symbol position in each time slot. SRS symb When the number of repetitions is 2 and the frequency hopping is set, intra-slot frequency hopping and inter-slot frequency hopping can be supported in each of the multiple antenna ports. Each of the multiple antenna ports can be mapped to different subcarrier sets in two pairs in each time slot. The two pairs can be R fac The antenna ports of the SRS resources may be mapped to the same set of subcarriers in each pair. In addition, the first portion of the antenna ports of the SRS resources may be mapped to the first set of subcarriers in each pair. The second portion of the antenna ports of the SRS resources may be mapped to the second set of subcarriers in each pair.

[0324] A periodic or semi-persistent SRS resource with cyclic shift hopping can be set within a BWP. The SRS resource can occupy the same OFDM symbol position in each time slot. The SRS resource of N symbols can occupy the same OFDM symbol position in each time slot. SRS symbWhen the number of repetitions is 2 and cyclic shift hopping is set, one or more antenna ports may correspond to different CS sets in two pairs in each time slot. The two pairs may be R fac The antenna ports of the SRS resources may be mapped to the same CS set in each pair. In addition, the first part of the antenna ports of the SRS resources may be mapped to the first CS set in each pair. The second part of the antenna ports of the SRS resources may be mapped to the second CS set in each pair.

[0325] The SRS resource can be set by an upper layer parameter. For example, the upper layer parameter can be SRS-Resource. For example, the upper layer parameter can also be SRS-PosResource. The number of antenna ports can be determined for the SRS resource. The number of consecutive OFDM symbols can also be determined for the SRS resource. The starting position of the time domain can also be determined for the SRS resource. The starting position of the frequency domain can also be determined for the SRS resource. The number of intervals can also be determined for the SRS resource. The maximum number of cyclic shifts can also be determined for the SRS resource. The length of the SRS sequence can also be determined for the SRS resource.

[0326] The SRS resource can be composed of one or more elements. One or more elements can be the number of antenna ports N. SRS ap , the number of consecutive OFDM symbols N SRS symb , part or all of the starting position l0 in the time domain and the starting position k0 in the frequency domain. Number of antenna ports N SRS ap It can be the number of antenna ports used for SRS. For example, the number of antenna ports N SRS a It can be provided by the first upper layer parameter. The first upper layer parameter can be nrofSRS-Ports. The number of antenna ports N SRS ap It can be any one of 1, 2, 4 and 8. The antenna port pi can be based on at least the number of antenna ports N SRS ap For example, i can be 0 to N SRS ap -1, the antenna port pi may be i+1000. The antenna port pi may be based at least on the number of antenna ports N SRS ap Whether it is determined by the first upper layer parameter. In the case where the first upper layer parameter is not provided, the number of antenna ports N SRS apIt can be 1. The antenna port can be any one of 1000, 1001, 1002, 1003, 1004, 1005, 1006, and 1007.

[0327] The number of consecutive OFDM symbols N SRS symb It can be any one of 1, 2, 4, 8, and 12. For example, the number of consecutive OFDM symbols N SRS symb It can be determined by an upper layer parameter. The upper layer parameter may be nrofSymbols. The upper layer parameter may be an upper layer parameter resourceMapping including a field of nrofSymbols.

[0328] The starting position l0 of the time domain can be determined by N slot symb -1-l offset Given. Offset l offset Can be an integer from 0 to 13. Offset l offset It can be counted backwards from the end of the time slot. offset It can be determined by upper layer parameters. The upper layer parameters can be resourceMapping. The upper layer parameters can include the startPosition field. offset Can be N SRS symb -1 or more.

[0329] An SRS sequence (Sounding Reference Signal Sequence) may be generated. For example, an SRS sequence may be generated for an SRS resource. (pi) (n, 1′) can be generated by using a part or all of Formula 1, Formula 2, Formula 3, and Formula 4. [Formula 1] [Formula 2] [Formula 3] [Formula 4]

[0330] The n in formula 1 can be greater than 0, and is also M SRS SC,b -1 or less. M SRS SC,b Can be the number of subcarriers. M SRSSC,b It can also be the length of the SRS sequence. The index 1′ of the OFDM symbol can be 0 to N SRS symb -1 index. The δ in formula 1 can be log2(K TC ). Interval number K TC It can be any value among 2, 4, and 8. The number of intervals K TC It can be set by an upper layer parameter. For example, the upper layer parameter may be transmissionComb.

[0331] u in Formula 1, Formula 2, and Formula 3 may be a group number. v in Formula 1, Formula 2, and Formula 3 may be a basic sequence number in a group. The group number may be an integer from 0 to 29. One group number may correspond to one group. One basic sequence number may correspond to one basic sequence. q in Formula 4 may be determined based on at least the group number u and the basic sequence number v. N ZC It can be the largest prime number less than a certain value. For example, a certain value can be M SRS Sc,b .

[0332] The cyclic shift αi may be a cyclic shift for antenna port pi. For example, antenna port pi and cyclic shift αi may be determined for each i. The cyclic shift αi may be determined by Formula 5.

[0333] α′ may be an initial cyclic shift value. In the case where cyclic shift hopping is not applied, α′ may be 0. For example, the initial cyclic shift value may be determined by the DCI format. The initial cyclic shift value may be 2πR fac / N SRS symb For example, in the case of applying cyclic shift frequency hopping, it is possible to fac and N SRS symb One or both of them are used to determine the initial value of the cyclic shift.

[0334] Index 1″ can be 1′. 1″ can be floor(1′ / R fac ). 1″ can be {0, 1...N SRS symb / R fac -1}. That is, 1″ can be the index of the time domain. [Formula 5]

[0335] The maximum number of cyclic shifts (maximum value) n CS,max SRS Based on the interval number K TC For example, in KTC When n is 2, CS,max sRS It can be 8. For example, in K TC When n is 4, CS,max SRS It can be 12. For example, in K TC When n is 8, CS,max SRS Can be 6. CS,i sRS It can be determined by any one of Formula 6, Formula 7 and Formula 8. [Formula 6] [Formula 7] [Formula 8]

[0336] For example, when condition 1 is met, n can be determined by formula 6 CS,i SRs For example, condition 1 may be the number of antenna ports N SRS ap is 4, and the maximum number of cyclic shifts is n CS,max sRS is 6. Condition 1 can also be the number of antenna ports N SRS ap is 8, and the maximum number of cyclic shifts is n CS,max SRS is 12. Condition 1 can also be the number of antenna ports N SRS ap is 8, and the maximum number of cyclic shifts is n CS,max SRS is 8. For example, when condition 2 is met, n can be determined by formula 7 CS,i SRS Condition 2 can be the number of antenna ports N SRS ap The condition 2 can also be the number of antenna ports N. SRS ap is 8, and the maximum number of cyclic shifts is n CS,max SRS is 6. Condition 2 can also be the number of antenna ports N SRS ap is 8, and the maximum number of cyclic shifts is n CS,max SRS is 12. For example, when condition 1 and condition 2 are satisfied, n can be determined by formula 6 CS，i SRSIn addition, when both condition 1 and condition 2 are met, n can also be determined by formula 7. CS，i SRs When condition 1 and condition 2 are not met, n can be determined by formula 8. CS,i SRS Condition 2 may also be omitted. For example, n may be determined by any one of Formula 6 and Formula 8. CS,i SRS .

[0337] n CS SRS It can be called the initial value of the circular shift. CS SRS Can be 0~n CS,max SRS -1 integer. n can be determined by the upper layer parameters CS SRS The upper layer parameter may be transmissionComb. n may be determined based on the upper layer parameter transmissionComb and whether cyclic shift hopping is applied. CSS Rs The cyclic shift initial value is a value that does not depend on the antenna port and can also be used to determine the cyclic shift αi or n CS,i SRS The value of .

[0338] The number of consecutive OFDM symbols N may be based on at least the upper layer parameter transmissionComb, SRS symb , repetition number R fac And the maximum number of cyclic shifts n CS,max SRS The initial cyclic shift value may be determined based on part or all of the cyclic shift hopping. Whether to apply cyclic shift frequency hopping may be set by an upper layer parameter. In the case where cyclic shift frequency hopping is not applied, the initial cyclic shift value may be determined based on the upper layer parameter transmissionComb. In the case where cyclic shift frequency hopping is applied, the initial cyclic shift value may be determined based on at least the upper layer parameter transmissionComb, the number of consecutive OFDM symbols N SRS symb , repetition number R fac And the maximum number of cyclic shifts n CS,max SRS The initial value of the cyclic shift is determined by part or all of the cyclic shift.

[0339] The number of consecutive OFDM symbols N may be based at least on SRS symb , repetition number R fac And the maximum number of cyclic shifts nCS,max SRS The cyclic shift initial value may be determined based on part or all of the cyclic shift initial value. For example, when cyclic shift frequency hopping is not applied, the cyclic shift initial value may be 0. When cyclic shift frequency hopping is applied, the cyclic shift initial value may be determined based on at least the number N of consecutive OFDM symbols. SRS symb , repetition number R fac And the maximum number of cyclic shifts n CS,max SRS For example, the initial value of the cyclic shift may be increased by n for each symbol index 1″. CS′ .n CS SRS It can be n CS′ 1″ and the value provided by the upper layer parameter transmissionComb.

[0340] The cyclic shift initial value may be determined based on at least the DCI format. For example, when cyclic shift frequency hopping is not applied, the cyclic shift initial value may be 0. When cyclic shift frequency hopping is applied, the cyclic shift initial value may be determined based on at least the DCI format. For example, n CS s Rs It can be the sum of the cyclic shift initial value and the value provided by the upper layer parameter transmissionComb.

[0341] One or both of the cyclic shift αi and the cyclic shift initial value may be determined, updated or changed for each first OFDM symbol number. The first OFDM symbol number may be one symbol. The first OFDM symbol number may be the number of repetitions R fac The first number of OFDM symbols may be determined by the DCI format. For example, one or both of the cyclic shift αi and the cyclic shift initial value may be a function of the OFDM symbol index 1′. For example, the cyclic shift (the value of the cyclic shift) may be based at least on l″=floor(1′ / R fac ) to determine.

[0342] The sequence number u may be determined based on at least the index 1′ of the OFDM symbol. In addition, the sequence number u may be determined based on at least the sequence ID n as the sequence ID (SRS sequence ID). SRS I D For example, the sequence group may be changed (frequency hopping) according to the index 1′ of the OFDM symbol. In addition, the index 1′ of the OFDM symbol may correspond to the antenna port pi. For example, the index of the OFDM symbol may be determined according to the index i.

[0343] The sequence ID may be based on at least the number N of consecutive OFDM symbols. SRS symband the number of repetitions R fac One or both of them. The sequence ID can be repeated for each number of times R fac Symbol to change.

[0344] The SRS may be sent in the SRS resource. When the SRS is sent in the SRS resource, the SRS sequence r corresponding to the OFDM symbol 1′ of the SRS resource and the antenna port may be (pi) (n, 1′) is multiplexed. For example, the start r of the SRS sequence (pi) (0, 1') can be mapped to resource element (k, 1) in a certain slot for each antenna port pi. For example, the start r of the SRS sequence (pi) (0, 1′) can be mapped to a resource element (k, 1) in a time slot based on at least antenna port pi, or can also be mapped to a resource element (k, l+1) in a time slot. That is, the SRS sequence can be mapped to a physical resource. (pi) (k', 1') may be mapped to a resource element according to Formula 9. Alternatively, 0 may be mapped to a resource element. [Formula 9]

[0345] β SRS It can be a scaling factor (Scaling factor or Amplitude scaling factor: amplitude scaling factor). The length of the SRS sequence M SRS SC,b The number of subcarriers N included in a resource block may be based on at least the number of intervals KTC and the number of subcarriers N included in a resource block. RB Sc to be sure.

[0346] The frequency position K of the resource element TC k′+k (pi )0 may be different depending on the antenna port pi. Frequency position K Tc k′+k (pi) 0 can be one or more subcarriers. Frequency position K TC k′+k (pi) 0 can also be a subcarrier set. For example, k (pi) 0 can be determined based on at least the antenna port pi. (pi) 0 can also be based on at least k (pi) TC To determine. (pi) TC It can be determined by either Formula 10 or Formula 11. [Formula 10] [Formula 11]

[0347] For example, when condition 3 is met, k can be determined by formula 10 (Pi) TC For example, condition 3 may be the number of antenna ports N SRS ap is 4, and the maximum number of cyclic shifts is n CS,max SRS The number of antenna ports N can be 6, and the number of antenna ports pi can be any one of {1001, 1003}. SRS ap is 4, and the maximum number of cyclic shifts is n CS SRS n CS,max SRS / 2~n CS ,max SRS -1, and the antenna port pi is any one of {1001, 1003}. For example, if condition 3 is not satisfied, k (Pi) TC can be k bar TC . The number of intervals is offset k bar TC It can be determined by an upper layer parameter. The upper layer parameter may be transmissionComb.

[0348] For example, when condition 4 is met, k can be determined by formula 11 (Pi) TC For example, condition 4 may include at least the number of antenna ports N SRS ap is 8. For example, condition 4 may also include at least one of the antenna port pi being any one of {1001, 1003, 1005, 1007}. For example, condition 4 may also include at least one of the antenna port pi being any one of {1000, 1001, 1002, 1003}. Condition 4 may also include n CS,max SRS is 6. It can also include n CS,max SRS is 12. For example, condition 4 may be the number of antenna ports N SRS ap is 8, and n CS,max SRS is 6, and the antenna port pi is any one of {1001, 1003, 1005, 1007}.

[0349] The SRS sequence can be determined based on at least the first sequence. For example, the first sequence can be a vector including values ​​of +1, -1, +j, and part or all of -j. j can be an imaginary number. For example, the first sequence can be a vector including values ​​of one or both of +1 and -1. The length N of the vector can be any one of 2 and 4. The length N of the vector can be the number of subcarriers. The first sequence can be a matrix including values ​​of +1, -1, +j, and part or all of -j. The first sequence can also be a matrix including values ​​of one or both of +1 and -1. For example, the matrix can be 2 rows and N columns. In addition, the matrix can also be N rows and 2 columns. For example, the first sequence corresponding to index k′ can be applied to the second sequence corresponding to index k. For example, the second sequence corresponding to index k and the first sequence corresponding to index k′ can be multiplied. Index k′ can be floor(kN / M SRS SC,b ). In addition, the index k′ may be mod(k, N). For example, the first sequence corresponding to the index k′ and the index 1′ may be applied to the third sequence corresponding to the index k and the index 1. For example, the third sequence corresponding to the index k and the index 1 and the first sequence corresponding to the index k′ and the index 1′ may also be multiplied. The index 1′ may be floor(1*2 / N SRS symb ). In addition, the index 1′ may be mod(1, 2). “*” may represent multiplication. The SRS sequence may be determined based on at least the first sequence. The SRS sequence may also be determined based on at least the second sequence.

[0350] Fig. 9It is a diagram showing an example of cyclic shift hopping for SRS of a scheme of the present embodiment. SRS resource 900 can be determined in a time slot. SRS resource 900 can be sent. SRS corresponding to SRS resource 900 can also be sent. SRS can be sent in SRS resource 900. SRS resource set corresponding to SRS resource 900 can also be sent. SRS resource 900 can be associated with aperiodic SRS. SRS resource 900 can also be associated with periodic SRS. SRS resource 900 can also be associated with semi-persistent SRS. That is, resourceType of SRS resource 900 can be set to "aperiodic", "semi-persistent", or "periodic". SRS resource 900 mapping one or more SRS sequences can also be sent. SRS resource 900 mapping one or more SRS can also be sent. SRS resource 900 can be indicated by SRI in DCI. SRS resource 900 can be determined by SRI. SRS resource 900 can be indicated by upper layer parameters. For example, the upper layer parameter may be srs-ResourceIndicator or srs-ResourceIndicator2. The usage of the SRS resource set associated with the SRS resource 900 may be "codebook". The usage of the SRS resource set associated with the SRS resource 900 may be "nonCodebook". The SRS resource 900 may have any one of 1, 2, 4, or 8 ports. For example, the SRS port in the SRS resource 900 may be additionally indexed as pi=1000+i. The SRS resource (resource) 900 may be one of the K SRS resources included in an SRS resource set. One or more SRS parameters for the SRS resource 900 may be set. For example, one or more SRS parameters may also be set by an SRS-Resource or SRS-PorResource corresponding to the SRS resource 900. The SRS resource 900 may be a target SRS resource. The SRS resource 900 may be set by an upper layer parameter. For example, the SRS resource 900 may be set in a serving cell and / or an uplink BWP. The SRS resource 900 may have a spatial region filter.

[0351] The SRS may be transmitted in the SRS resource 900. The SRS sequence may be mapped to a resource element. For example, when the SRS is transmitted in the SRS resource 900, a sequence (SRS sequence) corresponding to each OFDM symbol and each antenna port may be mapped to a resource element (physical resource). The SRS resource 900 may be used for SRS transmission. Fig. 9 A block in (a block containing "1" or "-1") can be a resource element. Fig. 9 The horizontal axis in may be the index 1′ of the OFDM symbol. Fig. 9 The vertical axis in may be the index k′ of the subcarrier. Fig. 9 The vertical axis in may also be an index for the length of the SRS sequence.

[0352] The number N of consecutive OFDM symbols used for SRS resource 900 SRS symb It can be 4. The SRS resource 900 can be composed of at least OFDM symbol 910, OFDM symbol 911, OFDM symbol 912 and OFDM symbol 913. The SRS resource 900 can occupy at least OFDM symbol 910, OFDM symbol 911, OFDM symbol 912 and OFDM symbol 913. OFDM symbol 910, OFDM symbol 911, OFDM symbol 912 and OFDM symbol 913 can be adjacent OFDM symbols.

[0353] Repetition factor R for SRS resource 900 fac The OFDM symbol set 920 may be composed of an OFDM symbol 910 and an OFDM symbol 911. The OFDM symbol set 921 may be composed of an OFDM symbol 912 and an OFDM symbol 913. The OFDM symbol set 920 and the OFDM symbol set 921 may be composed of R fac OFDM symbols.

[0354] The number of subcarriers used for SRS resource 900 may be M SRS SC,b .exist Fig. 9 In, M SRS SC,b It can be 6. Fig. 9 In the example, the length of the SRS sequence can be 6.

[0355] For example, a maximum of eight SRS sequences may be mapped to the SRS resource 900. For example, a maximum of eight SRS sequences may be multiplexed in the SRS resource 900.

[0356] For example, a portion or all of the first SRS sequence, the second SRS sequence, the third SRS sequence, the fourth SRS sequence, the fifth SRS sequence, the sixth SRS sequence, the seventh SRS sequence, and the eighth SRS sequence may be mapped to the SRS resource 900. The first SRS sequence may be determined based on at least the first antenna port. The second SRS sequence may be determined based on at least the second antenna port. The third SRS sequence may be determined based on at least the third antenna port. The fourth SRS sequence may be determined based on at least the fourth antenna port. The fifth SRS sequence may be determined based on at least the fifth antenna port. The sixth SRS sequence may be determined based on at least the sixth antenna port. The seventh SRS sequence may be determined based on at least the seventh antenna port. The eighth SRS sequence may be determined based on at least the eighth antenna port.

[0357] For example, the first antenna port may be 1000. For example, the second antenna port may be 1001. For example, the third antenna port may be 1002. For example, the fourth antenna port may be 1003. For example, the fifth antenna port may be 1004. For example, the sixth antenna port may be 1005. For example, the seventh antenna port may be 1006. For example, the eighth antenna port may be 1007. For example, the first antenna port may be 1000. For example, the second antenna port may also be 1002. For example, the third antenna port may also be 1004. For example, the fourth antenna port may also be 1006. For example, the fifth antenna port may also be 1001. For example, the sixth antenna port may also be 1003. For example, the seventh antenna port may also be 1005. For example, the eighth antenna port may also be 1007.

[0358] The first SRS sequence may be determined based on at least the 1_1th cyclic shift or the 1_2th cyclic shift. The second SRS sequence may be determined based on at least the 2_1th cyclic shift or the 2_2th cyclic shift. The third SRS sequence may be determined based on at least the 3_1th cyclic shift or the 3_2th cyclic shift. The fourth SRS sequence may be determined based on at least the 4_1th cyclic shift or the 4_2th cyclic shift. The fifth SRS sequence may be determined based on at least the 5_1th cyclic shift or the 5_2th cyclic shift. The sixth SRS sequence may be determined based on at least the 6_1th cyclic shift or the 6_2th cyclic shift. The seventh SRS sequence may be determined based on at least the 7_1th cyclic shift or the 7_2th cyclic shift. The eighth SRS sequence may be determined based on at least the 8_1th cyclic shift or the 8_2th cyclic shift.

[0359] The first SRS sequence may be determined based on at least a 1_1th cyclic shift in the OFDM symbols included in the OFDM symbol set 920. The first SRS sequence may also be determined based on at least a 1_2th cyclic shift in the OFDM symbols included in the OFDM symbol set 921. The nth SRS sequence may be determined based on at least an n_1th cyclic shift in the OFDM symbols included in the OFDM symbol set 920. The nth SRS sequence may also be determined based on at least an n_2th cyclic shift in the OFDM symbols included in the OFDM symbol set 921.

[0360] Fig. 9 The values ​​of "1" and "-1" in can be cyclic shift exp(j(αi*k1+α′1″)). For example, Fig. 9 αi in may be π. α′ may be a cyclic shift initial value. α′ may be π. 1″ may be an index for an OFDM symbol set. For example, when 1″ is 0, it may correspond to OFDM symbol set 920. For example, when 1″ is 1, it may correspond to OFDM symbol set 921.

[0361] As a problem, SRS can be used to measure channel quality, but the SRS of a terminal device may interfere with the SRS of another terminal device, thereby affecting the measurement of channel quality. Therefore, in order to dynamically change the parameters used for SRS to suppress the influence of interference, one or both of method 1 and method 2 can be used.

[0362] The terminal device 1 may include a generator. For example, the generator may generate a baseband signal. The generator may generate an SRS sequence (SRS signal, SRS). The transmitter in the terminal device 1 may transmit the SRS. That is, the transmitter in the terminal device 1 may transmit the SRS resource.

[0363] The SRS sequence may be mapped to an SRS resource. The SRS resource may be composed of at least a first number of OFDM symbols. For example, the first number of OFDM symbols may be N SRS symb .

[0364] The SRS sequence may be determined based on at least a cyclic shift. The cyclic shift may be αi. The cyclic shift may be determined based on at least an initial cyclic shift value. For example, the initial cyclic shift value may be included in the cyclic shift value used to determine n CS,i SRS The initial value of the circular shift can be n CS SRS The cyclic shift initial value may be determined according to the number of each second OFDM symbol. That is, the cyclic shift may be determined, updated or changed according to each second OFDM symbol.

[0365] For example, the cyclic shift initial value may be increased by a first value n for each second OFDM symbol number. CS′ The cyclic shift initial value may be included in the determination of n CS,i SRS The formula is n CS′ or 1″n CS′ For example, when the initial value of the cyclic shift at 1″=0 is 0, the initial value of the cyclic shift at 1″=1 may be n CS′ For example, the initial value of the cyclic shift at 1″ can be mod(1″n CS′ 、n CS,max SRS ). That is, the initial value of the cyclic shift can be determined based on the maximum number of cyclic shifts. CS′ Can be 1. n CS′ Can also be n CS,max SRS R fac / N SRS symb That is, the cyclic shift initial value may be determined based on at least one of the first OFDM symbol number, the second OFDM symbol number, and the cyclic shift maximum number. CS′ It can be determined by the DCI format.

[0366] The SRS sequence can be determined based on at least a cyclic shift. The SRS sequence can be mapped to the SRS resource based on the cyclic shift initial value. The cyclic shift initial value can be α′ or exp(jα′1″). For example, the product of the SRS sequence and the phase rotation exp(jα′1″) can be mapped to the SRS resource. 1″ can be 0 to N SRS symb / R fac -1. R fac It may be the second OFDM symbol number. The cyclic shift initial value may be determined for each second OFDM symbol. Alternatively, the SRS sequence may also be subjected to a phase rotation based on the cyclic shift initial value α′ for each second OFDM symbol.

[0367] The SRS sequence may be determined based on at least a cyclic shift and an initial cyclic shift value. The cyclic shift may be αi, and the initial cyclic shift value may be α '. The SRS sequence may be determined according to each second OFDM symbol number. The SRS sequence may also be determined, updated or changed based on the first change amount according to each second OFDM symbol number. The first change amount may be determined based on both the first OFDM symbol number and the second OFDM symbol number.

[0368] In method 1, the second number of OFDM symbols may be determined by upper layer parameters. For example, the second number of OFDM symbols may be the number of repetitions R facThe cyclic shift initial value may be determined based on one or both of the first OFDM symbol number and the second OFDM symbol number. The cyclic shift initial value may also be determined based on at least one of the first OFDM symbol number and the second OFDM symbol number.

[0369] In method 2, the second number of OFDM symbols may be determined by a DCI format. The cyclic shift initial value may be determined based on the DCI format. For example, a field included in the DCI format may indicate the second number of OFDM symbols. Moreover, the cyclic shift initial value may be determined based at least on the second number of OFDM symbols.

[0370] In method 2, the second number of OFDM symbols may be determined by upper layer parameters. For example, the second number of OFDM symbols may be the number of repetitions R fac The initial value of the cyclic shift may be determined by the DCI format.

[0371] The terminal device 1 may include a generating unit for generating an SRS sequence. The terminal device 1 may also include a transmitting unit for transmitting an SRS resource to which the SRS sequence is mapped. The SRS sequence may be determined based on at least one or both of a cyclic shift and an initial value of the cyclic shift. The initial value of the cyclic shift may be determined for each second OFDM symbol. The SRS sequence may be constructed based on at least the first number of OFDM symbols. The second number of OFDM symbols may be less than the first number of OFDM symbols or the same as the first number of OFDM symbols.

[0372] Hereinafter, various device aspects of one aspect of the present embodiment will be described.

[0373] (1) In order to achieve the above-mentioned object, the scheme of the present invention adopts the following means. That is, the first scheme of the present invention is a terminal device, comprising: a generating unit, generating an SRS sequence; a transmitting unit, transmitting an SRS resource mapped with the SRS sequence; and a radio resource control layer processing unit, receiving an upper layer parameter, wherein the SRS resource is composed of at least a first number of OFDM symbols, the SRS sequence is determined at least based on a cyclic shift, the cyclic shift is determined at least based on an initial cyclic shift value, the initial cyclic shift value is determined for each second number of OFDM symbols, the second number of OFDM symbols is determined based on the upper layer parameter, the second number of OFDM symbols is less than the first number of OFDM symbols or is the same as the first number of OFDM symbols. Moreover, it may be that the initial cyclic shift value is determined based on at least one of the first number of OFDM symbols, the second number of OFDM symbols, and the maximum number of cyclic shifts for the SRS sequence. Alternatively, it may be that the terminal device comprises a receiving unit for receiving a PDCCH mapped with a DCI format, and the initial cyclic shift value is determined by the DCI format.

[0374] (2) A second scheme of the present invention is a base station device, comprising: a receiving unit, receiving an SRS resource to which an SRS sequence is mapped; and a radio resource control layer processing unit, transmitting an upper layer parameter, wherein the SRS sequence is generated in the base station device, the SRS resource is composed of at least a first number of OFDM symbols, the SRS sequence is determined at least based on a cyclic shift, the cyclic shift is determined at least based on an initial cyclic shift value, the initial cyclic shift value is determined for each second number of OFDM symbols, the second number of OFDM symbols is determined based on the upper layer parameter, the second number of OFDM symbols is less than the first number of OFDM symbols or is the same as the first number of OFDM symbols. Furthermore, the initial cyclic shift value may be determined based on at least one of the first number of OFDM symbols, the second number of OFDM symbols, and a maximum number of cyclic shifts for the SRS sequence. Alternatively, the base station device may include a transmitting unit that transmits a PDCCH to which a DCI format is mapped, and the initial cyclic shift value is determined by the DCI format.

[0375] 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.

[0376] 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.

[0377] 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.

[0378] 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.

[0379] 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.

[0380] 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.

[0381] 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.

[0382] 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.

[0383] 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

[0384] 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 area 302, 303: Auxiliary cells 700.: A collection of resource elements for PSS 710, 711, 712, 713: resource element set 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: SRS Resources 910, 911, 912, 913: OFDM symbols 920, 921: OFDM symbol set

Claims

1. A terminal device comprising: A generating unit, generating an SRS sequence; A sending unit, sending an SRS resource mapping the SRS sequence; and The radio resource control layer processing unit receives upper layer parameters, The SRS resource is composed of at least a first number of OFDM symbols, The SRS sequence is determined based on at least a cyclic shift, The cyclic shift is determined based on at least a cyclic shift initial value, The cyclic shift initial value is determined according to each second OFDM symbol number, The second number of OFDM symbols is determined based on the upper layer parameter, The second number of OFDM symbols is less than the first number of OFDM symbols or is the same as the first number of OFDM symbols.

2. The terminal device according to claim 1, wherein: The cyclic shift initial value is determined based on at least one of the first OFDM symbol number, the second OFDM symbol number, and a maximum number of cyclic shifts for the SRS sequence.

3. The terminal device according to claim 1, wherein: The terminal device includes a receiving unit for receiving a PDCCH mapped with a DCI format, The cyclic shift initial value is determined by the DCI format.

4. A base station device, comprising: A receiving unit receives an SRS resource mapped with an SRS sequence; and The radio resource control layer processing unit sends upper layer parameters, In the base station device, the SRS sequence is generated, The SRS resource is composed of at least a first number of OFDM symbols, The SRS sequence is determined based on at least a cyclic shift, The cyclic shift is determined based on at least a cyclic shift initial value, The cyclic shift initial value is determined according to each second OFDM symbol number, The second number of OFDM symbols is determined based on the upper layer parameter, The second number of OFDM symbols is less than the first number of OFDM symbols or is the same as the first number of OFDM symbols.

5. The base station device according to claim 4, wherein: The cyclic shift initial value is determined based on at least one of the first OFDM symbol number, the second OFDM symbol number, and a maximum number of cyclic shifts for the SRS sequence.

6. The base station device according to claim 4, wherein: The base station device includes a transmission unit that transmits a PDCCH mapped with a DCI format. The cyclic shift initial value is determined by the DCI format.

7. A communication method, which is a communication method for a terminal device, The communication method comprises the following steps: Generate an SRS sequence; Sending an SRS resource mapping the SRS sequence; and Receive upper layer parameters, The SRS resource is composed of at least a first number of OFDM symbols, The SRS sequence is determined based on at least a cyclic shift, The cyclic shift is determined based on at least a cyclic shift initial value, The cyclic shift initial value is determined according to each second OFDM symbol number, The second number of OFDM symbols is determined based on the upper layer parameter, The second number of OFDM symbols is less than the first number of OFDM symbols or is the same as the first number of OFDM symbols.

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