Terminal device, base station device, and communication method

Abstract

To provide a communication method for efficient communication, a terminal device, and a base station device.SOLUTION: A method includes generating and transmitting, by a terminal device, an SRS sequence, for communication with a base station device. An SRS resource for transmitting the SRS sequence has a first number of OFDM symbols. The SRS sequence is determined based on a cyclic shift. The cyclic shift is determined based on an initial cyclic shift value. The initial cyclic shift value is determined for every second number of OFDM symbols. The second number of OFDM symbols is determined based on a higher layer parameter, and the second number of OFDM symbols is less than or the same as the first number of OFDM symbols.SELECTED DRAWING: Figure 9

Description

[Technical Field]

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

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

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

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

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

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

[0007] (1) A first aspect of the present invention is a terminal device, comprising: a generator for generating an SRS sequence; a transmitter for transmitting an SRS resource to which the SRS sequence is mapped; and an antenna for receiving higher layer parameters. and a signal resource control layer processing unit, wherein the SRS resource is at least a first OFDM symbol. the SRS sequence is determined based at least on a cyclic shift; The cyclic shift is determined based on at least an initial cyclic shift value, the initial cyclic shift value is determined for each second number of OFDM symbols, and the second OFDM The number of symbols is determined based on the higher layer parameters, and the second number of OFDM symbols is less than or equal to the first number of OFDM symbols.

[0008] (2) Also, a second aspect of the present invention is a base station device comprising: a receiving unit that receives an SRS resource to which an SRS sequence is mapped; and a radio resource control layer processing unit that transmits upper layer parameters, wherein 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 for each second number of OFDM symbols, the second number of OFDM symbols is determined based on the upper layer parameters, and the second number of OFDM symbols is less than or equal to the first number of OFDM symbols.

[0009] (3) A third aspect of the present invention is a communication method used in a terminal device, comprising: generating a sequence; transmitting an SRS resource to which the SRS sequence is mapped; and receiving higher layer parameters, wherein the SRS resource is configured 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 based at least on an initial cyclic shift value, the initial cyclic shift value is determined for every second number of OFDM symbols, the second number of OFDM symbols is determined based on the higher layer parameters, and the second number of OFDM symbols is less than or equal to the first number of OFDM symbols.

[0010] (4) A fourth aspect of the present invention is a communication method used in a base station device, comprising: an SRS A step of receiving an SRS resource to which the sequence is mapped and a step of transmitting higher layer parameters. and a step of generating the SRS sequence, the SRS resource being configured with at least a first number of OFDM symbols, the SRS sequence being determined based at least on a cyclic shift. the cyclic shift is determined based on at least a cyclic shift initial value, the cyclic shift initial value is determined for each second number of OFDM symbols, the second number of OFDM symbols is determined based on the higher layer parameter, and the second number of OFDM symbols is less than or equal to the first number of OFDM symbols. [Effects of the Invention]

[0011] According to the present invention, the terminal device can perform communication efficiently, and the base station device can perform communication efficiently. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a conceptual diagram of a wireless communication system according to an aspect of the present embodiment. [Figure 2]10 is an example showing the relationship between a subcarrier spacing setting μ, the number of OFDM symbols per slot Nslot symb, and a cyclic prefix (CP) setting according to one aspect of the present embodiment. [Figure 3] FIG. 10 is a diagram illustrating an example of a method for configuring a resource grid according to an aspect of the present embodiment. [Figure 4] FIG. 3 is a diagram illustrating an example of the configuration of a resource grid 3001 according to an aspect of the present embodiment. [Figure 5] 2 is a schematic block diagram illustrating an example of the configuration of a base station device 3 according to one aspect of the present embodiment. FIG. [Figure 6] 1 is a schematic block diagram showing an example of the configuration of a terminal device 1 according to an aspect of the present embodiment. [Figure 7] FIG. 2 is a diagram illustrating an example of the configuration of an SS / PBCH block according to one aspect of this embodiment. [Figure 8] FIG. 10 is a diagram illustrating an example of a monitoring opportunity for a set of search areas according to one aspect of the present embodiment. [Figure 9] FIG. 10 is a diagram illustrating an example of cyclic shift hopping for SRS according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

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

[0015] In a wireless communication system according to an aspect of the present embodiment, at least Orthogonal Frequency Division Multiplexing (OFDM) is used. An OFDM symbol is a unit of time domain of OFDM. An OFDM symbol includes at least one or more subcarriers. The OFDM symbol is converted into a time-continuous signal in baseband signal generation. In the downlink, at least CP-OFDM (Cyclic Prefix - Orthogonal Frequency Division Multiplexing) is used. In the uplink, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform - spread - Orthogonal Frequency Division Multiplexing) is used. DFT-s-OFDM may be obtained by applying transform precoding to CP-OFDM.

[0016] The OFDM symbol may be a name including a CP added to the OFDM symbol. In other words, a certain OFDM symbol may be configured to include the certain OFDM symbol and the CP added to the certain OFDM symbol.

[0017] Fig. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment. In Fig. 1, the wireless communication system includes at least terminal devices 1A to 1C and a base station device 3 (BS#3: Base station#3). Hereinafter, the terminal devices 1A to 1C will also be referred to as terminal device 1 (UE#1: User Equipment#1).

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

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

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

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

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

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

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

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

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

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

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

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

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

[0031] A slot may consist of multiple OFDM symbols, for example, N consecutive OFDM symbols. slot symb For example, in the normal CP setting, N OFDM symbols may constitute one slot. slot symb = 14. In addition, in the setting of the extended CP, N slotsymb =12.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[0051] Carrier aggregation is the process of providing multiple aggregated serving The carrier aggregation may be performed by using a cell. The carrier aggregation may be performed by using a plurality of aggregated component carriers. The carrier aggregation may be performed by using a plurality of aggregated downlink component carriers. The carrier aggregation may be performed by using a plurality of aggregated uplink component carriers.

[0052] Fig. 5 is a schematic block diagram showing an example configuration of a base station device 3 according to one aspect of the present embodiment. As shown in Fig. 5, the base station device 3 includes at least a radio transceiver unit (physical layer processing unit) 30 and / or part or all of a higher layer processing unit 34. The radio transceiver unit 30 includes at least an antenna unit 31, an RF (Radio Frequency) unit 32, and part or all of a baseband unit 33. The higher layer processing unit 34 includes at least a medium access control layer processing unit 35 and part or all of a radio resource control (RRC) layer processing unit 36.

[0053] The wireless transceiver 30 includes at least a wireless transmitter 30a and part or all of a wireless receiver 30b. The baseband unit included in the wireless transmitter 30a and the baseband unit included in the wireless receiver 30b may have the same or different device configurations. The RF unit included in wireless transmitting unit 30a and the RF unit included in wireless receiving unit 30b may have the same or different device configurations. Furthermore, the antenna unit included in wireless transmitting unit 30a and the antenna unit included in wireless receiving unit 30b may have the same or different device configurations.

[0054] For example, the radio transmitting unit 30a may generate and transmit a PDSCH baseband signal. For example, the radio transmitting unit 30a may generate and transmit a PDCCH baseband signal. For example, the radio transmitting unit 30a may generate and transmit a PBCH baseband signal. For example, the radio transmitting unit 30a may generate and transmit a synchronization signal baseband signal. For example, the radio transmitting unit 30a may generate and transmit a PDSCH DMRS baseband signal. For example, the radio transmitting unit 30a may generate and transmit a PDCCH DMRS baseband signal. For example, the radio transmitting unit 30a may generate and transmit a CSI-RS baseband signal. For example, the radio transmitting unit 30a may generate and transmit a DL PTRS baseband signal. For example, a generating unit in the radio transmitting unit 30a may generate a baseband signal.

[0055] For example, the radio receiving unit 30b may receive a PRACH. For example, the radio receiving unit 30b may receive and demodulate a PUCCH. The radio receiving unit 30b may receive and demodulate a PUSCH. For example, the radio receiving unit 30b may receive a PUCCH DMRS. For example, the radio receiving unit 30b may receive a PUSCH DMRS. For example, the radio receiving unit 30b may receive an UL PTRS. For example, the radio receiving unit 30b may receive an SRS.

[0056] The upper layer processing unit 34 outputs the downlink data (transport block) to the radio transceiver unit 30 (or the radio transmitter unit 30a). The upper layer processing unit 34 performs processing on the Medium Access Control (MAC) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the RRC layer.

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

[0058] The radio resource control layer processing unit 36 included in the upper layer processing unit 34 performs processing of the RRC layer. The RRC layer processing unit 36 processes various setting information / parameters (RRC parameters) of the terminal device 1. The radio resource control layer processing unit 36 manages the RRC message received from the terminal device 1. Set the parameters based on the message.

[0059] The radio transceiver 30 (or the radio transmitter 30a) performs processing such as modulation and encoding. The radio transceiver 30 (or the radio transmitter 30a) modulates, encodes, and transmits downlink data. The radio transmission / reception unit 30 (or the radio transmission unit 30a) generates a physical signal by generating a baseband signal (converting it into a time-continuous signal) and transmits it to the terminal device 1. Alternatively, the signal may be arranged on a component carrier and transmitted to the terminal device 1.

[0060] The radio transmitting / receiving unit 30 (or the radio receiving unit 30b) performs processes such as demodulation and decoding. The wireless transceiver 30 (or the wireless receiver 30b) separates, demodulates, and The radio transmitting / receiving unit 30 (or the radio receiving unit 30b) may perform a channel access procedure prior to transmitting a physical signal.

[0061] The RF unit 32 converts (down-converts) the signal received via the antenna unit 31 into a baseband signal by quadrature demodulation, and removes unnecessary frequency components. The RF unit 32 outputs the processed analog signal to the baseband unit.

[0062] The baseband unit 33 converts the analog signal input from the RF unit 32 into The baseband unit 33 removes a portion corresponding to a CP (Cyclic Prefix) from the converted digital signal, and performs the following on the signal from which the CP has been removed: A fast Fourier transform (FFT) is performed to extract the frequency domain signal.

[0063] The baseband unit 33 performs an Inverse Fast Fourier Transform (IFFT) on the data to generate OFDM symbols, adds CPs to the generated OFDM symbols, generates baseband digital signals, and converts the baseband digital signals into analog signals. The baseband unit 33 outputs the converted analog signals 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, and up-converts the analog signal to a carrier frequency. The RF unit 32 converts the received signal into a digital signal and transmits it via the antenna unit 31. The RF unit 32 may also have a function to control transmission power. The RF unit 32 is also referred to as a transmission power control unit.

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

[0066] Each of the serving cells configured for the terminal device 1 is a PCell (Primary cell, The cell may be any one of a Primary Cell (PSCell), a Primary SCG cell (PSCell), and a Secondary Cell (SCell).

[0067] The PCell is a serving cell included in an MCG (Master Cell Group). The PCell is a cell (cell) in which the terminal device 1 performs an initial connection establishment procedure or a connection re-establishment procedure. (cells where the treatment was performed).

[0068] A PSCell is a serving cell included in an SCG (Secondary Cell Group). , is the serving cell to which random access is performed by the terminal device 1.

[0069] An SCell may be included in either an MCG or an 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 operated by carrier aggregation.

[0071] One or more downlink BWPs may be configured for each serving cell (or downlink component carrier). One or more uplink BWPs are configured for each component carrier. That's fine.

[0072] Of one or more downlink BWPs configured for a serving cell (or a downlink component carrier), one downlink BWP is set as the active downlink BWP. may be configured (or one downlink BWP may be activated). Of one or more uplink BWPs configured for a serving cell (or uplink component carrier), one uplink BWP is set as the active uplink BWP. (Alternatively, one uplink BWP may be activated).

[0073] PDSCH, PDCCH, and CSI-RS may be received in an active downlink BWP. The terminal device 1 may attempt to receive the PDSCH, PDCCH, and CSI-RS in an active downlink BWP. The PUCCH and PUSCH are transmitted in an active uplink BWP. The terminal device 1 may transmit PUCCH and PUSCH in the active uplink BWP. The active downlink BWP and the active uplink BWP are also collectively referred to as the active BWP.

[0074] PDSCH, PDCCH, and CSI-RS are transmitted in downlink BWPs other than the active downlink BWP ( The terminal device 1 may not receive the signal in the inactive downlink BWP. In a downlink BWP that is not an active downlink BWP, the reception of PDSCH, PDCCH, and CSI-RS is PUCCH and PUSCH are not active uplink BWPs and therefore no transmission is attempted. The terminal device 1 does not need to transmit the PUCCH and the PUSCH in an uplink BWP that is not an active uplink BWP. Active BWPs are collectively referred to as inactive BWPs.

[0075] A downlink BWP switch is a process of switching one active UE in a serving cell. Deactivate the downlink BWP and deactivate the in-band BWP of the serving cell. This is the procedure to activate one of the active downlink BWPs. Downlink BWP switching may be controlled by the BWP field included in the downlink control information. Downlink BWP switching may also be controlled based on higher layer parameters. good.

[0076] The uplink BWP switching is used to deactivate one active uplink BWP and activate any inactive uplink BWP other than the one active uplink BWP. The uplink BWP switching may be controlled by a BWP field included in the downlink control information. The uplink BWP switching may also be controlled based on higher layer parameters.

[0077] Of one or more downlink BWPs configured for the serving cell, two or more A downlink BWP does not have to be set as the active downlink BWP. For a serving cell, one downlink BWP may be active at a given time.

[0078] Two or more of one or more uplink BWPs configured for the serving cell An uplink BWP does not have to be set as the active uplink BWP. For a serving cell, one uplink BWP may be active at a given time.

[0079] Fig. 6 is a schematic block diagram showing an example configuration of a terminal device 1 according to one aspect of the present embodiment. As shown in Fig. 6, the terminal device 1 includes at least one or all of a radio transmission / reception unit (physical layer processing unit) 10 and an upper layer processing unit 14. The radio transmission / reception unit 10 includes at least an antenna unit 11, an RF unit 12, and part or all of a baseband unit 13. The upper layer processing unit 14 includes at least a medium access control layer processing unit 15 and part or all of a radio resource control layer processing unit 16.

[0080] The wireless transceiver 10 includes at least a wireless transmitter 10a and a part or all of a wireless receiver 10b. The device configuration of the baseband unit 13 included in 10b may be the same or different. The RF unit 12 included in the wireless transmitting unit 10a and the RF unit 12 included in the wireless receiving unit 10b may have the same configuration or may have different configurations. The antenna unit 11 and the antenna unit 11 included in the wireless receiving unit 10b have the same device configuration. may or may not be the same.

[0081] For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PRACH. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUCCH. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUSCH. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUCCH DMRS. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUSCH DMRS. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a UL PTRS. For example, the radio transmitting unit 10a may generate and transmit a baseband signal of a PUCCH DMRS. The receiving unit 10a may generate and transmit a baseband signal of the SRS. Generating the signal may include generating an SRS sequence.

[0082] For example, the wireless receiver 10b may receive and demodulate a PDSCH. For example, the wireless receiver 10b may receive and demodulate a PDCCH. For example, the wireless receiver 10b may receive and demodulate a PBCH. For example, the wireless receiver 10b may receive a synchronization signal. For example, the wireless receiver 10b may receive a PDSCH DMRS. For example, the wireless receiver 10b may receive a PDCCH DMRS. For example, the wireless receiver 10b may receive a CSI-RS. For example, the wireless receiver 10b may receive a DL PTRS.

[0083] The upper layer processing unit 14 outputs the uplink data (transport block) to the radio transceiver unit 10 (or the radio transmitter unit 10a). The upper layer processing unit 14 performs processing on the MAC layer, the integrated packet data protocol layer, the radio link control layer, and the RRC layer.

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

[0085] The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing for the RRC layer. The RRC layer processing unit 16 processes various setting information / parameters (RRC parameters) of the terminal device 1. The radio resource control layer processing unit 16 manages the RRC messages received from the base station device 3. Set RRC parameters based on the message.

[0086] The radio transmission / reception unit 10 (or the radio transmission unit 10a) performs processing such as modulation and encoding. The radio transceiver 10 (or the radio transmitter 10a) modulates, encodes, and transmits uplink data. The radio transmitter / receiver 10 (or the radio transmitter 10a) generates a physical signal by generating a baseband signal (converting it into a time-continuous signal) and transmits it to the base station device 3. It may be arranged in a certain BWP (active uplink BWP) and transmitted to the base station device 3.

[0087] The radio transmitting / receiving unit 10 (or the radio receiving unit 10b) performs processes such as demodulation and decoding. The radio transceiver 10 (or the radio receiver 30b) may receive a physical signal in a certain BWP (active downlink BWP) of a certain serving cell. The radio receiving unit 10b) separates, demodulates, and decodes the received physical signal, and outputs the decoded information as The radio transmission / reception unit 10 (radio reception unit 10b) outputs the physical signal to the upper layer processing unit 14. A channel access procedure may be performed prior to the

[0088] The RF unit 12 converts (down-converts) the signal received via the antenna unit 11 into a baseband signal by quadrature demodulation, and removes unnecessary frequency components. The analog signal processed by the digital signal processing unit 12 is output to the baseband unit 13 .

[0089] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 extracts a cyclic prefix (CP) from the converted digital signal. The signal from which the CP has been removed is subjected to a fast Fourier transform (FFT) to extract the signal in the frequency domain.

[0090] The baseband unit 13 performs an inverse fast Fourier transform (IFFT) on the uplink data to generate an OFDM symbol, and adds a CP to the generated OFDM symbol. The baseband unit 13 converts the baseband digital signal into an analog signal, and outputs the converted analog signal to the RF unit 12.

[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, and up-converts the analog signal to a carrier frequency. The RF unit 12 converts the received signal into a digital signal and transmits it via the antenna unit 11. The RF unit 12 may also have a function to control transmission power. The RF unit 12 is also referred to as a transmission power control unit.

[0092] The physical signals (signals) will be explained below.

[0093] The physical signal is a general term for a downlink physical channel, a downlink physical signal, an uplink physical channel, and an uplink physical channel. The physical channel is a general term for a downlink physical channel and an uplink physical channel. The physical signal is a general term for a downlink physical signal and an uplink physical signal.

[0094] The uplink physical channel may correspond to a set of resource elements that convey information generated in a higher layer. The uplink physical channel may be a physical channel used in an uplink component carrier. The uplink physical channel may be transmitted by a terminal device 1. The uplink physical channel may be received by a base station device 3. In a wireless communication system according to one aspect of the present embodiment, at least some or all of the following uplink physical channels may be used. ·PUCCH (Physical Uplink Control CHannel) ·PUSCH (Physical Uplink Shared CHannel) ·PRACH(Physical Random Access CHannel)

[0095] PUCCH is used to transmit uplink control information (UCI). The PUCCH may be used. The PUCCH may be transmitted to deliver (deliver, transmit, convey) uplink control information. The uplink control information may be mapped to the PUCCH. The terminal device 1 may transmit the PUCCH in which the uplink control information is mapped. The base station device 3 may receive the PUCCH in which the uplink control information is mapped.

[0096] Uplink control information (uplink control information bit, uplink control information sequence, uplink control information type) is used in combination with channel state information (CSI), schedule The packet contains at least part or all of the Scheduling Request (SR) and Hybrid Automatic Repeat request ACKnowledgement (HARQ-ACK) information.

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

[0099] A transport block is a sequence of information bits delivered from higher layers. Here, the sequence of information bits is also called a bit sequence. Here, the transport block may be transmitted via an Uplink-Shared Channel (UL-SCH) in the transport layer.

[0100] HARQ-ACK for a transport block may be referred to as HARQ-ACK for a PDSCH. In this case, the "HARQ-ACK for PDSCH" is transmitted to the transport included in the PDSCH. Indicates the HARQ-ACK for the block.

[0101] The HARQ-ACK may indicate an ACK or NACK corresponding to one Code Block Group (CBG) included in the transport block.

[0102] A scheduling request is a request to retrieve the UL-SCH for a new transmission. The scheduling request bit may be used at least to request a resource. The scheduling request bit may be used to indicate either a positive SR or a negative SR. When the scheduling request bit indicates a positive SR, this is also referred to as "a positive SR is transmitted." A positive SR indicates that the terminal device 1 is to transmit a UL-SCH A positive SR may indicate that resources of UL-SCH are requested for initial transmission. A positive SR may indicate that a scheduling request is triggered by a higher layer. A positive SR may be transmitted when a scheduling request is indicated by a higher layer. When the scheduling request bit indicates a negative SR, this is also referred to as "a negative SR is transmitted." A negative SR may indicate that no resources of UL-SCH are requested by the terminal device 1 for initial transmission. A negative SR may indicate that no resources of UL-SCH are requested for initial transmission by the terminal device 1. A positive SR may indicate that no scheduling request is triggered by higher layers. A negative SR may be conveyed when no scheduling request is indicated by higher layers.

[0103] The channel state information may include at least some or all of a Channel Quality Indicator (CQI), a Precoder Matrix Indicator (PMI), and a Rank Indicator (RI). The CQI is an indicator related to the quality of a propagation path (e.g., propagation strength) or the quality of a physical channel, the PMI is an indicator related to a precoder, and the RI is an indicator related to a transmission rank (or the number of transmission layers).

[0104] The channel state information is an indicator of the reception state of at least the physical signal (e.g., CSI-RS) used for channel measurement. The value of the channel state information is used for channel measurement. The channel measurement may be determined by the terminal device 1 based on the reception conditions assumed by at least the physical signals used for the channel measurement. The channel measurement may include an interference measurement.

[0105] The PUCCH may correspond to a PUCCH format. The PUCCH may be a set of resource elements used to convey the PUCCH format. The PUCCH may include a PUCCH format. The PUCCH may be transmitted with a certain PUCCH format. The PUCCH format may be interpreted as a format of information. The PUCCH format may also be interpreted as a set of information set in a certain information format.

[0106] The PUSCH carries transport blocks and / or uplink control information. The transport block may be placed on the PUSCH. The transport block delivered by the UL-SCH may be arranged in the PUSCH. The uplink control information may be arranged in the PUSCH. A PUSCH in which one or both of the uplink control information and the PUSCH are arranged may be transmitted. The base station device 3 receives either the transport block or the uplink control information. It is also possible to receive a PUSCH in which both are arranged.

[0107] The PRACH may be transmitted to carry a random access preamble. The base station device 1 may transmit the PRACH. The base station device 3 may receive the PRACH. column x u,v (n) is x u,v (n)=x u (mod(n+C v ,L RA )), where x u is a ZC (Zadoff-Chu) sequence. u x u =exp(-jπui(i+1) / L RA ) by j is the imaginary unit. Also, π is the ratio of the circumference of a circle to its circumference. Also, C v corresponds to the cyclic shift of the PRACH sequence. RA corresponds to the length of the PRACH sequence. RA is 839 or 139. Also, i ranges from 0 to L RA -1 and u is the sequence index for the PRACH sequence.

[0108] For each PRACH opportunity, 64 random access preambles are defined. The access preamble is the cyclic shift C of the PRACH sequence. v, and the sequence index u for the PRACH sequence. An index may be assigned to each of the bulls.

[0109] The uplink physical signal may correspond to a set of resource elements. The uplink physical signal does not have to be used to transmit information generated in a higher layer. The uplink physical signal may be used to transmit information generated in a physical layer. The uplink physical signal may be a physical signal used in an uplink component carrier. The terminal device 1 may transmit the uplink physical signal. The base station device 3 may receive the uplink physical signal. In a wireless communication system according to one aspect of the present embodiment, at least some or all of the following uplink physical signals may be used. ·UL DMRS(UpLink Demodulation Reference Signal) ·SRS(Sounding Reference Signal) ·UL PTRS(UpLink Phase Tracking Reference Signal)

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

[0111] The set of antenna ports for DMRSs for PUSCH (DMRSs related to PUSCH, DMRSs included in PUSCH, and DMRSs corresponding to PUSCH) may be determined based on the set of antenna ports for the PUSCH. For example, the set of antenna ports for DMRSs for PUSCH may be the same as the set of antenna ports for the PUSCH.

[0112] The transmission of the PUSCH and the transmission of the DMRS for the PUSCH are indicated by one DCI format. The PUSCH and the DMRS for the PUSCH may be collectively referred to as a PUSCH. Transmitting the PUSCH may be equivalent to transmitting the PUSCH and the DMRS for the PUSCH.

[0113] The propagation path of the PUSCH may be estimated from the DMRS for the PUSCH.

[0114] The set of antenna ports for DMRS for PUCCH (DMRS related to PUCCH, DMRS included in PUCCH, DMRS corresponding to PUCCH) may be the same as the set of antenna ports for PUCCH.

[0115] The transmission of the PUCCH and the transmission of the DMRS for the PUCCH are indicated by one DCI format. Mapping of PUCCH to resource elements (resource element mapping), and to the resource elements of the DMRS for the PUCCH One or both of the mappings P The UCCH and the DMRS for the PUCCH may be collectively referred to as the PUCCH. This may involve transmitting a PUCCH and a DMRS for the PUCCH.

[0116] The propagation path of the PUCCH may be estimated from the DMRS for the PUCCH.

[0117] The downlink physical channel may correspond to a set of resource elements that convey information generated in a higher layer. The downlink physical channel may be a physical channel used in a downlink component carrier. The base station device 3 may transmit the downlink physical channel. The terminal device 1 may receive the downlink physical channel. In a wireless communication system according to one aspect of this embodiment, at least some or all of the following downlink physical channels may be used. ·PBCH(Physical Broadcast Channel) ·PDCCH (Physical Downlink Control Channel) ·PDSCH(Physical Downlink Shared Channel)

[0118] The PBCH may be transmitted to convey one or both of a Master Information Block (MIB) and physical layer control information. Here, the physical layer control information is information generated in the physical layer. The MIB is a set of parameters allocated to a Broadcast Control Channel (BCCH), which is a logical channel of the MAC layer. The BCCH is allocated to a BCH, which is a channel of the transport layer. The BCH may be mapped to the PBCH. The terminal device 1 may receive the PBCH allocated with the MIB and / or physical layer control information. The base station device 3 may transmit the PBCH allocated with the MIB and / or physical layer control information.

[0119] For example, the physical layer control information may be configured with 8 bits. The physical layer control information may include at least some or all of the following 0A to 0D. 0A) Radio frame bit 0B) Half radio frame (half system frame, half frame) bit 0C) SS / PBCH block index bit 0D) Subcarrier offset bit

[0120] The radio frame bits are used to indicate the radio frame in which the PBCH is transmitted (the radio frame including the slot in which the PBCH is transmitted). The radio frame bits include 4 bits. The radio frame bits may be configured by 4 bits of a 10-bit radio frame indicator. For example, the radio frame indicator may be used to identify at least radio frames with index 0 to index 1023.

[0121] The half radio frame bit is used to indicate whether the PBCH is transmitted in the first five subframes or the last five subframes of a radio frame in which the PBCH is transmitted. Here, a half radio frame may be configured to include five subframes. Alternatively, a half radio frame may be configured to include the first five subframes of ten subframes included in a radio frame. Alternatively, a half radio frame may be configured to include the last five subframes of ten subframes included in a radio frame.

[0122] The SS / PBCH block index bits are used to indicate the SS / PBCH block index. The SS / PBCH block index bits include 3 bits. The SS / PBCH block index bits may be configured with 3 bits of a 6-bit SS / PBCH block index indicator. The SS / PBCH block index indicator may be used at least to identify SS / PBCH blocks from index 0 to index 63.

[0123] The subcarrier offset bit is used to indicate a subcarrier offset, which may be used to indicate the difference between the first subcarrier to which the PBCH is mapped and the first subcarrier to which the control resource set with index 0 is mapped.

[0124] The PDCCH may be transmitted to convey downlink control information (DCI). The downlink control information may be mapped to the PDCCH. The base station device 3 may receive the PDCCH in which the downlink control information is arranged. A PDCCH in which downlink control information is allocated may be transmitted.

[0125] The downlink control information may be transmitted with a DCI format. The DCI format may be interpreted as a format of the downlink control information. The DCI format may be It may also be interpreted as a set of downlink control information set in a certain downlink control information format.

[0126] DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1 are DCI formats. The downlink DCI format is a general term for DCI format 0_0 and DCI format 0_1. The downlink DCI format is a general term for DCI format 1_0 and DCI format 1_1.

[0127] DCI format 0_0 is used at least for scheduling PUSCHs allocated to a cell. DCI format 0_0 is used for scheduling some of the fields from 1A to 1E or It consists of at least all of the above. 1A) Identifier field for DCI formats 1B) Frequency domain resource assignment field 1C) Time domain resource assignment field 1D) Frequency hopping flag field 1E) MCS field (Modulation and Coding Scheme field)

[0128] The DCI format specific field is a DCI format specific field. The DCI format specification field may indicate whether the format is an uplink DCI format or a downlink DCI format. That is, the DCI format specification field may be included in each of the uplink DCI format and the downlink DCI format. Here, the DCI format specification field included in DCI format 0_0 may indicate 0.

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

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

[0131] The frequency hopping flag field indicates whether frequency hopping is applied to the PUSCH. It may be used to indicate whether or not

[0132] The MCS field included in DCI format 0_0 specifies the modulation scheme for PUSCH, and , and the target coding rate for the transport block placed on the PUSCH. The size of a transport block (TBS) allocated to the PUSCH may be determined based on one or both of a target coding rate and a modulation scheme for the PUSCH.

[0133] DCI format 0_0 does not include fields used for CSI requests. It's not necessary.

[0134] DCI format 0_0 may not include a carrier indicator field. That is, the serving cell to which the uplink component carrier on which the PUSCH scheduled by DCI format 0_0 is allocated belongs uses the DCI format 0_0. The serving cell is the same as the uplink component carrier on which the PDCCH including the The terminal device 1 may transmit a PUSCH scheduled in accordance with the DCI format 0_0 to an uplink component carrier of a serving cell based on detecting the DCI format 0_0 in a downlink component carrier of the serving cell. It may be recognized that the carrier may be placed.

[0135] DCI format 0_0 may not include the BWP field. The DCI format 0_0 may be a DCI format for scheduling a PUSCH without changing the active uplink BWP. The terminal device 1 may recognize that the PUSCH is to be transmitted without switching the active uplink BWP based on detecting the DCI format 0_0 used for scheduling the PUSCH.

[0136] DCI format 0_1 is used at least for scheduling PUSCHs allocated to a cell. DCI format 0_1 is used for part of fields 2A to 2H or It consists of at least all of the above. 2A) DCI format specific fields 2B) Frequency domain resource allocation field 2C) Uplink time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS Field 2F) CSI request field 2G) BWP field 2H) Carrier indicator field

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

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

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

[0140] The MCS field included in DCI format 0_1 specifies the modulation scheme for PUSCH, and and / or may at least be used to indicate some or all of the target code rate.

[0141] The BWP field of DCI format 0_1 is the The DCI format 0_1 may be used to indicate an uplink BWP in which a PUSCH to be scheduled is arranged. That is, the DCI format 0_1 may involve a change of the active uplink BWP. The terminal device 1 may recognize the uplink BWP in which the PUSCH is arranged based on detecting the DCI format 0_1 used for scheduling the PUSCH.

[0142] DCI format 0_1, which does not include the BWP field, is used to change the active uplink BWP. The terminal device 1 may recognize that the PUSCH is to be transmitted without switching the active uplink BWP based on detecting DCI format D0_1, which is DCI format 0_1 used for scheduling the PUSCH and does not include a BWP field.

[0143] DCI format 0_1 includes a BWP field, but terminal device 1 does not include the DCI format If the terminal device 1 does not support the BWP switching function by 0_1, the BWP field may be ignored by the terminal device 1. In other words, the terminal device 1 that does not support the BWP switching function , DCI format 0_1 used for PUSCH scheduling and BWP format Based on detecting the DCI format 0_1 including the field, the terminal device 1 may recognize that it will transmit the PUSCH without switching the active uplink BWP. If the terminal device 1 supports the BWP switching function, it may report that "the terminal device 1 supports the BWP switching function" in the RRC layer capability information reporting procedure.

[0144] The CSI request field is used to indicate the reporting of CSI.

[0145] If DCI format 0_1 includes a carrier indicator field, The rear indicator field indicates the uplink component carrier in which the PUSCH is located. DCI format 0_1 may be used to indicate a carrier indicator. If the field is not included, the uplink component carrier on which the PUSCH is allocated is A PDCCH including DCI format 0_1 used for scheduling the PUSCH is arranged. When the number of uplink component carriers configured in the terminal device 1 in a certain serving cell group is two or more (when uplink carrier aggregation is operated in a certain serving cell group), the scheduling of the PUSCH allocated to the certain serving cell group may be the same as the uplink component carrier configured in the certain serving cell group. The carrier indicator field included in DCI format 0_1 used for The number of bits may be 1 or more (for example, 3 bits). When the number of uplink component carriers configured in the terminal device 1 in a certain serving cell group is 1 (when uplink carrier aggregation is not operated in a certain serving cell group), the scheduling of the PUSCH allocated to the certain serving cell group Carrier indicator field included in DCI format 0_1 used for The number of bits in the carrier indicator field may be 0 (or the DCI format 0_1 used for scheduling the PUSCH allocated to the certain serving cell group may not include the carrier indicator field).

[0146] DCI format 1_0 is used at least for scheduling PDSCHs allocated to a certain cell. DCI format 1_0 may use at least some or all of 3A to 3F. It also includes the following: 3A) DCI Format Specific Fields 3B) Frequency domain resource allocation field 3C) Time Domain Resource Allocation Field 3D) MCS field 3E) PDSCH_HARQ feedback timing indicator field 3F) PUCCH resource indicator field

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

[0148] The frequency domain resource allocation field included in DCI format 1_0 may be used at least to indicate the allocation of frequency resources for the PDSCH.

[0149] The time domain resource allocation field included in DCI format 1_0 may be used at least to indicate the allocation of time resources for the PDSCH.

[0150] The MCS field included in DCI format 1_0 specifies the modulation scheme for PDSCH, and , and the target coding rate for the transport block placed on the PDSCH. The size of a transport block (TBS) allocated to the PDSCH may be determined based on one or both of a target coding rate and a modulation scheme for the PDSCH.

[0151] The PDSCH_HARQ feedback timing indication field specifies the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH. It may also be used to indicate a

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

[0153] DCI format 1_0 may not include a carrier indicator field. That is, the downlink component carrier on which the PDSCH scheduled by DCI format 1_0 is arranged may be the same as the downlink component carrier on which the PDCCH including the DCI format 1_0 is arranged. Based on detecting DCI format 1_0 in a certain downlink component carrier, the terminal device 1 may arrange the PDSCH scheduled by the DCI format 1_0 in the downlink component carrier. It may be recognized that the carrier may be placed.

[0154] DCI format 1_0 may not include the BWP field. The DCI format 1_0 may be a DCI format for scheduling the PDSCH without changing the active downlink BWP. The terminal device 1 may recognize that it will receive the PDSCH without switching the active downlink BWP based on detecting the DCI format 1_0 used for scheduling the PDSCH.

[0155] DCI format 1_1 is used at least for scheduling PDSCHs allocated to a certain cell. DCI format 1_1 includes at least some or all of 4A to 4I. It also includes the following: 4A) DCI Format Specific Fields 4B) Frequency domain resource allocation field 4C) Time Domain Resource Allocation Field 4E) MCS Field 4F) PDSCH_HARQ feedback timing indication field 4G) PUCCH resource indication field 4H) BWP Field 4I) Career Indicator Field

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

[0157] The frequency domain resource allocation field included in DCI format 1_1 may be used at least to indicate the allocation of frequency resources for the PDSCH.

[0158] The time domain resource allocation field included in DCI format 1_1 may be used at least to indicate the allocation of time resources for the PDSCH.

[0159] The MCS field included in DCI format 1_1 specifies the modulation scheme for PDSCH, and , may be used to indicate at least one or both of the target coding rates.

[0160] If DCI format 1_1 includes a PDSCH_HARQ feedback timing indication field, the PDSCH_HARQ feedback timing indication field may be used at least to indicate an offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH. If DCI format 1_1 does not include a PDSCH_HARQ feedback timing indication field, the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH may be specified by a parameter of a higher layer.

[0161] The PUCCH resource indication field may be a field indicating an index of one or more PUCCH resources included in a PUCCH resource set.

[0162] The BWP field of DCI format 1_1 is the The DCI format 1_1 may be used to indicate the downlink BWP in which the PUSCH to be scheduled is arranged. That is, the DCI format 1_1 may involve a change of the active downlink BWP. The terminal device 1 may recognize the downlink BWP in which the PUSCH is arranged based on detecting the DCI format 1_1 used for scheduling the PDSCH.

[0163] DCI format 1_1, which does not include the BWP field, is used to change the active downlink BWP. The terminal device 1 may recognize that it will receive the PDSCH without switching the active downlink BWP, based on detecting the DCI format 1_1 that is used for scheduling the PDSCH and does not include the BWP field.

[0164] DCI format 1_1 includes a BWP field, but terminal device 1 does not If the terminal device 1 does not support the BWP switching function by 1_1, the BWP field may be ignored by the terminal device 1. In other words, the terminal device 1 that does not support the BWP switching function , DCI format 1_1 used for PDSCH scheduling and BWP format Based on detecting the DCI format 1_1 including the field, the terminal device 1 may recognize that it will receive the PDSCH without switching the active downlink BWP. If the terminal device 1 supports the BWP switching function, it may report that "the terminal device 1 supports the BWP switching function" in the RRC layer capability information reporting procedure.

[0165] If DCI format 1_1 includes a carrier indicator field, The rear indicator field indicates the downlink component carrier on which the PDSCH is located. DCI Format 1_1 may be used to indicate a carrier indicator. If the field is not included, the downlink component carrier on which the PDSCH is allocated is A PDCCH including DCI format 1_1 used for scheduling the PDSCH is arranged. The downlink component carrier may be the same as the downlink component carrier of a serving cell group. When the number of downlink component carriers configured in the terminal device 1 in a serving cell group is two or more (when downlink carrier aggregation is operated in a serving cell group), the scheduling of the PDSCH allocated to the serving cell group is performed. The carrier indicator field included in DCI format 1_1 used for The number of bits may be 1 or more (for example, 3 bits). When the number of downlink component carriers configured in the terminal device 1 in a certain serving cell group is 1 (when downlink carrier aggregation is not operated in a certain serving cell group), the scheduling of the PDSCH arranged in the certain serving cell group Carrier indicator field included in DCI format 1_1 used for The number of bits in may be 0 (or the carrier indicator field may not be included in DCI format 1_1 used for scheduling the PDSCH allocated to the certain serving cell group).

[0166] The PDSCH may be transmitted to transmit a transport block. The PDSCH may be used to transmit a transport block delivered by the DL-SCH. The PDSCH may be used to transmit a transport block. A transport block may be allocated to the PDSCH. A transport block corresponding to the DL-SCH may be allocated to the PDSCH. The base station device 3 may transmit the PDSCH. The terminal device 1 may receive the PDSCH.

[0167] The downlink physical signal may correspond to a set of resource elements. The downlink physical signal may not carry information generated in a higher layer. The downlink physical signal may be a physical signal used in a downlink component carrier. The downlink physical signal may be transmitted by a base station device 3. The downlink physical signal may be transmitted by a terminal device 1. In a wireless communication system according to one aspect of this embodiment, at least some or all of the following downlink physical signals may be used. ·Synchronization signal (SS) ·DL DMRS(DownLink DeModulation Reference Signal) ·CSI-RS(Channel State Information-Reference Signal) ·DL PTRS(DownLink Phase Tracking Reference Signal)

[0168] The synchronization signal may be used by the terminal device 1 to synchronize one or both of the frequency domain and the time domain of the downlink. The synchronization signal is a general term for a PSS (Primary Synchronization Signal) and an SSS (Secondary Synchronization Signal).

[0169] FIG. 7 is a diagram showing an example of the configuration of an SS / PBCH block according to one aspect of this embodiment. In FIG. 7, the horizontal axis is the time axis (OFDM symbol index l sym ), where the vertical axis represents the frequency domain. Block 700 represents a set of resource elements for the PSS. Block 720 shows the set of resource elements for SSS. Blocks 710, 711, 712, and 713 indicate a set of resource elements for the PBCH and DMRS for the PBCH (DMRS associated with the PBCH, DMRS included in the PBCH, and DMRS corresponding to the PBCH).

[0170] As shown in Figure 7, the SS / PBCH block includes a PSS, SSS, and PBCH. The SS / PBCH block includes four consecutive OFDM symbols. The SS / PBCH block includes 240 subcarriers. The PSS is the 57th to 183rd subcarriers in the first OFDM symbol. The SSS is located in the 57th to 183rd subcarriers in the third OFDM symbol. The PBCH is allocated to the 1st subcarrier of the first OFDM symbol. Zeros may be set to the 1st to 56th subcarriers of the first OFDM symbol. Zeros may be set to the 184th to 240th subcarriers of the first OFDM symbol. Zeros may be set to the 49th to 56th subcarriers of the third OFDM symbol. Zeros may be set to the 184th to 192nd subcarriers of the third OFDM symbol. The PBCH is allocated to the 1st to 240th subcarriers of the second OFDM symbol, which are subcarriers where DMRS for the PBCH is not allocated. The PBCH is allocated to the 1st to 48th subcarriers of the third OFDM symbol, which are subcarriers where DMRS for the PBCH is not allocated. The PBCH is allocated to the 193rd to 240th subcarriers of the third OFDM symbol, which are subcarriers where DMRS for the PBCH is not allocated. The PBCH is allocated to the 1st to 240th subcarriers of the fourth OFDM symbol, which are subcarriers to which the DMRS for the PBCH is not allocated.

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

[0172] The PBCH on which the PBCH symbol is transmitted at a certain antenna port may be estimated by the DMRS for the PBCH that is placed in the slot to which the PBCH is mapped and is included in the SS / PBCH block to which the PBCH belongs.

[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 DMRSs for a PDSCH (DMRSs associated with a PDSCH, DMRSs included in a PDSCH, and DMRSs corresponding to a PDSCH) may be determined based on the set of antenna ports for the PDSCH, i.e., the set of antenna ports for DMRSs for a PDSCH may 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 are indicated by one DCI format. The PDSCH and the DMRS for the PDSCH may be collectively referred to as the PDSCH. Transmitting the PDSCH may be equivalent to transmitting the PDSCH and the DMRS for the PDSCH.

[0176] The propagation path of a PDSCH may be estimated from the DMRS for that PDSCH. A set of resource elements on which a DMRS symbol is transmitted and the DMRS symbol for the PDSCH are transmitted. When a set of resource elements on which symbols of a PDSCH are transmitted is included in the same precoding resource group (PRG), the PDSCH on which the symbols of the PDSCH of a certain antenna port are transmitted may be estimated by the DMRS for the PDSCH.

[0177] The antenna port of the DMRS for the PDCCH (DMRS related to the PDCCH, DMRS included in the PDCCH, DMRS corresponding to the PDCCH) may be the same as the antenna port for the PDCCH.

[0178] The PDCCH may be estimated from the DMRS for the PDCCH, i.e., the propagation path of the PDCCH may be estimated from the DMRS for the PDCCH. a set of resource elements and a resource on which the DMRS symbols for the PDCCH are transmitted; If the same precoder is applied (or is assumed to be applied) to a set of elements, the symbols of the PDCCH on a certain antenna port are transmitted. The PDCCH to be used may be estimated by the DMRS for the PDCCH.

[0179] The BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel), and DL-SCH (Downlink-Shared CHannel) are transport channels that 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. The transport blocks that pass through the BCH are delivered to the PBCH of the physical layer. The UL-SCH at the transport layer is mapped to the PUSCH at the physical layer, i.e., the transport block carried on the UL-SCH at the transport layer is delivered to the PUSCH at the physical layer. The DL-SCH at the transport layer is mapped to the PDSCH at the physical layer, i.e., the transport block carried on the DL-SCH at the transport layer is delivered to the PDSCH at the physical layer.

[0181] One UL-SCH and one DL-SCH may be provided for each serving cell. The BCH may be provided for the PCell. The BCH does not necessarily have to be provided for the PSCell or SCell.

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

[0183] The BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example, the BCCH is a channel of the RRC layer used for transmitting MIB or system information. The CCCH (Common Control CHannel) may be used for transmitting an RRC message common to a plurality of terminal devices 1. Here, the CCCH may be used, for example, for a terminal device 1 that is not RRC connected. The DCCH (Dedicated Control CHannel) may be used at least for transmitting an RRC message dedicated to the terminal device 1. Here, the DCCH may be used, for example, for a terminal device 1 that is RRC connected.

[0184] Upper layer parameters that are common to multiple terminal devices 1 are also referred to as common upper layer parameters. Here, the common upper layer parameters may be defined as parameters specific to a serving cell. Here, parameters specific to a serving cell are parameters that are common to terminal devices (e.g., terminal devices 1-A, B, C) in which the serving cell is set. It may also be a

[0185] For example, the common upper layer parameters may be included in the RRC messages delivered on the BCCH. For example, common upper layer parameters may be included in RRC messages delivered on the DCCH. .

[0186] Among certain upper layer parameters, upper layer parameters different from common upper layer parameters are also referred to as dedicated upper layer parameters. Here, the dedicated upper layer parameters can provide dedicated RRC parameters to the terminal device 1-A in which the serving cell is configured. In other words, the dedicated RRC parameters are upper layer parameters that can provide unique settings for each of the terminal devices 1-A, 1-B, and 1-C.

[0187] The BCCH of the logical channel is mapped to the BCH or DL-SCH of the transport layer. For example, a transport block containing MIB information is delivered to the BCH of the transport layer. A transport block containing system information other than MIB is delivered to the DL-SCH of the transport layer. The CCCH is mapped to the DL-SCH or UL-SCH. In other words, a transport block mapped to the CCCH is delivered to the DL-SCH or UL-SCH. The DCCH is mapped to the DL-SCH or UL-SCH. In other words, a transport block mapped to the DCCH is delivered to the 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 an MIB. The RRC message may also include system information. The RRC message may also include a message corresponding to a CCCH. The RRC message may also include a message corresponding to a DCCH. An RRC message including a message corresponding to a DCCH is also referred to as a dedicated RRC message.

[0189] The upper layer parameters (parameters of the upper layer) are parameters included in RRC parameters or MAC CE (Medium Access Control Control Element). That is, the upper layer parameters are a general term for the parameters included in MIB, system information, messages corresponding to CCCH, messages corresponding to DCCH, and MAC CE. The parameters included in MAC CE are transmitted by MAC CE (Control Element) commands.

[0190] The procedure performed by the terminal device 1 includes at least some or all of the following steps 5A to 5C. 5A) Cell Search 5B) Random Access 5C) Data communication

[0191] The cell search is a procedure used by the terminal device 1 to synchronize with a certain cell in the time domain and the frequency domain and detect a physical cell identity. That is, the terminal device 1 may perform the cell search to synchronize with a certain cell in the time domain and the frequency domain and detect a physical cell ID.

[0192] The sequence of PSSs is based at least on a physical cell ID. The sequence of SSSs is based at least on a physical cell ID.

[0193] The SS / PBCH block candidates indicate resources on which transmission of the SS / PBCH block is permitted (possibly, reserved, configured, defined, possible).

[0194] The set of SS / PBCH block candidates in a half radio frame is also called the SS burst set. The SS burst set is a set of candidates for the transmission window. It is also called the SS transmission window, the DRS transmission window, or the Discovery Reference Signal transmission window. The SS burst set is a general term that includes at least the first SS burst set and the second SS burst set.

[0195] The base station device 3 transmits SS / PBCH blocks of one or more indexes at a predetermined period. The terminal device 1 may detect at least one of the SS / PBCH blocks of the one or more indexes and attempt to decode the PBCH included in the SS / PBCH block.

[0196] Random access is a procedure that includes at least some or all of message 1, message 2, message 3, and message 4.

[0197] Message 1 is a procedure for transmitting a PRACH by the terminal device 1. The terminal device 1 A PRACH is transmitted in one PRACH opportunity selected from one or more PRACH opportunities based at least on an index of a SS / PBCH block candidate detected based on a cell search. Each PRACH opportunity is defined based on at least time and frequency domain resources. can be.

[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 in which the SS / PBCH block is detected. .

[0199] Message 2 is a procedure in which the terminal device 1 attempts to detect DCI format 1_0 with a CRC (Cyclic Redundancy Check) scrambled with an RA-RNTI (Random Access - Radio Network Temporary Identifier). The terminal device 1 attempts to detect a PDCCH including this DCI format in a control resource set given based on an MIB included in a PBCH included in an SS / PBCH block detected based on a cell search and in resources indicated based on the setting of a search space set. Message 2 is also referred to as a random access response.

[0200] Message 3 is contained in DCI format 1_0 detected by the Message 2 procedure. The PUSCH is transmitted by the random access response grant. Here, the random access response grant grant) is indicated by the MAC CE included in the PDSCH scheduled by the DCI format 1_0.

[0201] The PUSCH scheduled based on the random access response grant is Message 3 PUSCH contains a contention resolution identifier MAC CE. The contention resolution identifier MAC CE is used to identify the contention. Contains the conflict resolution ID.

[0202] Message 3 PUSCH retransmissions are scheduled with DCI format 0_0 with CRC scrambled based on TC-RNTI (Temporary Cell - Radio Network Temporary Identifier).

[0203] Message 4 is a procedure for attempting to detect DCI format 1_0 with a CRC scrambled based on either a C-RNTI (Cell-Radio Network Temporary Identifier) or a TC-RNTI. The terminal device 1 performs scheduling based on the DCI format 1_0. The PDSCH may include a collision 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 in the resources specified based on the control resource set and the search space set (monitors the PDCCH, detects the PDCCH, etc.). monitor).

[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 may consist of contiguous resources (non-interleaved mapping) or distributed resources. (interleaver mapping).

[0207] A set of resource blocks constituting the control resource set may be indicated by a higher layer parameter, and the number of OFDM symbols constituting the control resource set may be indicated by a higher layer parameter.

[0208] The terminal device 1 attempts to detect the PDCCH in the search space set. Attempting to detect a PDCCH in the search space set may be attempting to detect a PDCCH candidate in the search space set, or attempting to detect a DCI format in the search space set. Alternatively, the PDCCH may be detected in the control resource set. Alternatively, the PDCCH may be detected in the control resource set. , it may be to attempt to detect the DCI format in the control resource set.

[0209] The search space set is defined as a set of PDCCH candidates. The search space set may be a Common Search Space (CSS) set or a UE-specific Search Space (USS) set. The terminal device 1 attempts to detect PDCCH candidates in some 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 search space set.

[0210] The Type 0 PDCCH common search space set is used as the common search space set with index 0. The Type 0 PDCCH common search space set may include the common search space with index 0. It may be a set.

[0211] The CSS set is a collective term for 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, and a Type 3 PDCCH common search space set. The USS set is also called a UE-specific PDCCH search space set.

[0212] A search space set is associated with (contained in, corresponds to) a control resource set. The index of the control resource set associated with the search space set may be indicated by a higher layer parameter.

[0213] For a given search area set, some or all of 6A to 6C may be indicated by at least higher layer parameters. 6A) PDCCH monitoring periodicity 6B) PDCCH monitoring pattern within a slot 6C) PDCCH monitoring offset

[0214] A monitoring occasion for a certain set of search areas is defined as The monitoring opportunity for a search space set may correspond to an OFDM symbol in which the first OFDM symbol of the associated control resource set is located. The monitoring opportunity for a search space set may correspond to resources of a control resource set associated with the search space set starting from the first OFDM symbol of the control resource set. The monitoring opportunity for the search space set is based on at least some or all of the PDCCH monitoring interval, the PDCCH monitoring pattern within the slot, and the PDCCH monitoring offset.

[0215] 8 is a diagram illustrating an example of a monitoring opportunity for a search area set according to one aspect of the present embodiment. In FIG. 8, search area set 91 and search area set 92 are set in primary cell 301, search area set 93 is set in secondary cell 302, and search area set 94 is set in secondary cell 303.

[0216] In Figure 8, the solid white blocks in primary cell 301 indicate search area set 91, the solid black blocks in primary cell 301 indicate search area set 92, the blocks in secondary cell 302 indicate search area set 93, and the blocks in secondary cell 303 indicate search area set 94.

[0217] The monitoring interval of the search area set 91 is set to 1 slot, and the monitoring interval of the search area set 91 is set to 1 slot. The offset is set to 0 slots, and the monitoring pattern of the search area set 91 is [1,0 ,0,0,0,0,0,1,0,0,0,0,0,0]. The monitoring opportunities for search area set 91 correspond to the first OFDM symbol (OFDM symbol #0) and the eighth OFDM symbol (OFDM symbol #7) in each slot.

[0218] The monitoring interval of the search area set 92 is set to 2 slots, the monitoring offset of the search area set 92 is set to 0 slots, and the monitoring pattern of the search area set 92 is [1,0 ,0,0,0,0,0,0,0,0,0,0,0,0,0]. The monitoring opportunity for search area set 92 corresponds to the first OFDM symbol (OFDM symbol #0) in each of the even slots.

[0219] The monitoring interval of the search area set 93 is set to 2 slots, the monitoring offset of the search area set 93 is set to 0 slots, and the monitoring pattern of the search area set 93 is [0,0 ,0,0,0,0,0,1,0,0,0,0,0,0]. The monitoring opportunity for search area set 93 corresponds to the eighth OFDM symbol (OFDM symbol #7) in each of the even slots.

[0220] The monitoring interval of the search area set 94 is set to 2 slots, the monitoring offset of the search area set 94 is set to 1 slot, and the monitoring pattern of the search area set 94 is set to [1,0 ,0,0,0,0,0,0,0,0,0,0,0,0,0]. The monitoring opportunity for search area set 94 corresponds to the first OFDM symbol (OFDM symbol #0) in each odd slot.

[0221] The Type 0 PDCCH common search space set may be used at least for DCI formats with a Cyclic Redundancy Check (CRC) sequence scrambled by a System Information-Radio Network Temporary Identifier (SI-RNTI).

[0222] The Type 0a PDCCH common search space set is the SI-RNTI (System Information-Radio Network Time Interference (SNTI)). CRC (Cyclic Redundancy Check) scrambled by a Temporary Identifier It may be used at least for DCI formats involving sequences.

[0223] The Type 1 PDCCH common search space set may be used at least for DCI formats with a CRC sequence scrambled by a Random Access-Radio Network Temporary Identifier (RA-RNTI) and / or a CRC sequence scrambled by a Temporary Cell-Radio Network Temporary Identifier (TC-RNTI).

[0224] A Type 2 PDCCH common search space set may be used for a DCI format with a CRC sequence scrambled by a Paging-Radio Network Temporary Identifier (P-RNTI).

[0225] The Type 3 PDCCH common search space set may be used for a DCI format with a CRC sequence scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI).

[0226] The UE dedicated PDCCH search space set may be used at least for DCI formats with CRC sequences scrambled by the C-RNTI.

[0227] In downlink communication, the terminal device 1 detects the downlink DCI format. The detected downlink DCI format is used at least for PDSCH resource allocation. The detected downlink DCI format is also referred to as downlink assignment. The terminal device 1 attempts to receive the PDSCH. Based on the PUCCH resource indicated based on the detected downlink DCI format, the terminal device 1 reports a HARQ-ACK corresponding to the PDSCH (a HARQ-ACK corresponding to a transport block included in the PDSCH) to the base station device 3.

[0228] In uplink communication, the terminal device 1 detects the uplink DCI format. The detected DCI format is used at least for PUSCH resource allocation. The detected uplink DCI format is also called an uplink grant. The terminal device 1 transmits the PUSCH.

[0229] In the configured grant, PUSCH is scheduled. An uplink grant for scheduling is configured for each transmission period of the PUSCH. When the PUSCH is scheduled by the uplink DCI format, some or all of the information indicated by the uplink DCI format may be indicated by the uplink grant configured in the case of configured scheduling.

[0230] The UL slot may be a slot consisting of UL symbols. The special slot may be a slot consisting of UL symbols, flexible symbols, and DL symbols. The DL slot may be a slot consisting of DL symbols.

[0231] The UL symbol may be an OFDM symbol configured or indicated for uplink in time division duplex. The UL symbol may be an OFDM symbol configured or indicated for PUSCH, PUCCH, PRACH, or SRS. The UL symbol may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The UL symbol may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated. The UL slots may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The UL slots may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated. It may be provided accordingly.

[0232] The DL symbol may be an OFDM symbol configured or indicated for downlink in time division duplex. The DL symbol may be an OFDM symbol configured or indicated for PDSCH or PDCCH. The DL symbol may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The DL symbol may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated. The DL slot may be provided by the higher layer parameter tdd-UL-DL-ConfigurationCommon. The DL slot may be provided by the higher layer parameter tdd-UL-DL-ConfigurationDedicated.

[0233] The flexible symbols may be OFDM symbols within a certain period that are not configured or indicated as UL symbols or DL symbols. The certain period may be a period given by the upper layer parameter dl-UL-TransmissionPeriodicity. The flexible symbols may be used for PDSCH, PDCCH, PUSCH, PUCCH, or PRACH. It may be an OFDM symbol set or indicated.

[0234] The upper layer parameter tdd-UL-DL-ConfigurationCommon may be a parameter for setting a UL slot, a DL slot, or a special slot for each of one or more slots. The upper layer parameter tdd-UL-DL-ConfigurationDedicated may be a parameter for setting a UL symbol, a DL symbol, or a flexible symbol for each of the one or more slots. The tdd-UL-DL-ConfigurationCommon may be a common upper layer parameter. The tdd-UL-DL-ConfigurationDedicated may be a dedicated upper layer parameter.

[0235] PUSCH-Config may be a dedicated upper layer parameter. PUSCH-ConfigCommon may be a common upper layer parameter. PUSCH-Config is configured per BWP for PUSCH transmission. The PUSCH-Config may include multiple higher layer parameters related to PUSCH transmission. The PUSCH-Config may be a UE-specific setting. For example, the PUSCH-Config for the terminal device 1A, the terminal device 1B, and the terminal device 1C in one cell, or multiple higher layer parameters included in the PUSCH-Config, may be different. The PUSCH-ConfigCommon may be set for each BWP for PUSCH transmission. The PUSCH-ConfigCommon may include multiple higher layer parameters related to PUSCH transmission. The PUSCH-ConfigCommon may be a cell-specific setting. For example, the PUSCH-ConfigCommon for the terminal device 1A, the terminal device 1B, and the terminal device 1C in one cell may be common. For example, the PUSCH-ConfigCommon may be provided by system information.

[0236] Repeated transmission may be applied to the PUSCH. For example, repeated transmission may be applied to the PUSCH scheduled by DCI. Repeated transmission may be applied to PUSCH scheduled by grant. The PUSCH repetition type is PUSCH repetition type A and PUSCH repetition type B. The PUSCH repetition type is configured by higher layer parameters. The PUSCH repetition type may be based on the DCI format. For example, a first PUSCH repetition type for a PUSCH scheduled by DCI format 0_1 may be different from a second PUSCH repetition type for a PUSCH scheduled by DCI format 0_2.

[0237] The number of repetitions for PUSCH repeat transmission may be configured by higher layer parameters. For example, the upper layer parameter numberOfRepetitions is the number of repetitions for PUSCH repeated transmission. The parameter may include the number of repetitions. In repeated transmission, the number of repetitions for the PUSCH repeated transmission may be determined by the value of the higher layer parameter numberOfRepetitions. In PUSCH repetition type A, the number of repetitions for a PUSCH whose transmission is indicated by a DCI format with a CRC scrambled by C-RNTI and either MCS-C-RNTI or CS-RNTI may be equal to numberOfRepetitions if the numberOfRepetitions is present in the resource allocation table. When one PUSCH-TimeDomainResourceAllocation includes one or more PUSCH-Allocations, the higher layer parameter numberOfRepetitions may be set for each PUSCH-Allocation. Furthermore, the PUSCH-TimeDomainResourceAllocation may be referred to as a resource allocation table.

[0238] The upper layer parameter pusch-AggregationFactor is the repetition factor for PUSCH repetition transmission. The parameter may be a parameter indicating the number of PUSCH repetitions corresponding to PUSCH repetition type A. In transmission, the number of repetitions for the PUSCH repeat transmission may be determined by the value of the higher layer parameter pusch-AggregationFactor. In PUSCH repetition type A, the number of repetitions of a PUSCH whose transmission is indicated by a DCI format with a CRC scrambled by C-RNTI and either MCS-C-RNTI or CS-RNTI may be equal to pusch-AggregationFactor if pusch-AggregationFactor is configured. pusch-AggregationFactor may be configured for PUSCH-Config.

[0239] The number of repetitions corresponding to PUSCH repetition type A is the slot number for PUSCH repetition transmission. Also, one TB may be repeated in one or more slots. PUSCH repetitions transmitted in different slots may be assigned to the same OFDM symbol. may be applied.

[0240] In PUSCH repetition transmission corresponding to PUSCH repetition type B, nominal repetition is used. It may be based on Repetition and Actual Repetition.

[0241] The frequency hopping scheme may be configured by higher layer parameters. The higher layer parameters frequencyHopping, frequencyHoppingDCI-0-1, and frequencyHoppingDCI-0-2 may be parameters providing a frequency hopping scheme for the PUSCH. For example, a frequency hopping scheme corresponding to the frequency hopping for the PUSCH may be configured by frequencyHoppingDCI-0-2 in PUSCH-Config. Furthermore, a frequency hopping scheme corresponding to the frequency hopping for the PUSCH may be configured by frequencyHopping in PUSCH-Config. Furthermore, a frequency hopping scheme corresponding to the frequency hopping for PUSCH transmission configured by frequencyHopping in configuredGrantConfig may be configured. The frequency hopping scheme may be any of intra-slot frequency hopping, inter-slot frequency hopping, and inter-repetition frequency hopping. Furthermore, the frequency hopping interval corresponding to intra-slot frequency hopping may be one slot or less. The frequency hopping interval corresponding to inter-slot frequency hopping may be one slot or multiple slots. The frequency hopping interval corresponding to inter-repetition frequency hopping may be based on nominal repetition.

[0242] For example, the hopping interval may be provided by a higher layer parameter, which may for example be a dedicated higher layer parameter.

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

[0244] Intra-slot frequency hopping is applicable to PUSCH transmission in one or more slots. For example, intra-slot frequency hopping may be used for PUSCH repetitive transmission. For PUSCHs where intra-slot frequency hopping is applied, 1 or For example, for a PUSCH to which intra-slot frequency hopping is applied, the allocation of resource blocks may be switched for one or more OFDM symbols. The placement may be switched between first hop and second hop. Furthermore, when intra-slot frequency hopping is performed for the PUSCH, the first hop and the second hop may be switched every one or more OFDM symbols. The difference between the position of the first resource block of the first hop and the position of the first resource block of the second hop is RB offset RB offsetmay be configured by a higher layer parameter. The one or more OFDM symbols may be within one slot. The one or more OFDM symbols may be half the number of OFDM symbols for the PUSCH in one slot. Intra-slot frequency hopping may be applied to the PUSCH corresponding to PUSCH repetition type A.

[0245] Inter-slot frequency hopping is applied to PUSCH transmission in multiple slots. For PUSCH to which inter-slot frequency hopping is applied, The allocation of resource blocks may be switched. For example, inter-slot frequency hopping may be applied to PUSCH repeated transmission. Furthermore, when inter-slot frequency hopping is performed for PUSCH, the allocation of resource blocks may be switched between the first hop and the second hop for each slot. For example, in a certain slot, slot index n μ s,f If n is an even number, the PUSCH transmission in the slot may correspond to the first hop. For example, in a slot, slot index n μ s,f If is odd, the PUSCH transmission in the given slot may correspond to the second hop. Inter-slot frequency hopping is available for PUSCH repetition type A and PUSCH repetition type B. It may be applied to a PUSCH corresponding to either type B.

[0246] Inter-repetition frequency hopping is applied to PUSCH corresponding to PUSCH repetition type B. For PUSCH where frequency hopping between repetitions is applied, the nominal repetition rate may be Based on the response, the first and second hops may be switched.

[0247] At least two transmission schemes may be supported for the PUSCH. For example, codebook-based transmission may be one of the transmission schemes for the PUSCH. For example, non-codebook-based transmission may be one of the transmission schemes for the PUSCH. A higher layer parameter may provide either codebook transmission or non-codebook transmission. For example, if 'codebook' is set for the higher layer parameter, the terminal device 1 may be configured for codebook transmission. For example, if 'nonCodebook' is set for the higher layer parameter, the terminal device 1 may be configured for non-codebook transmission. The higher layer parameter may be txConfig. The higher layer parameter may be usage. For example, if the higher layer parameter is not set, the terminal device 1 may not expect to be scheduled by either DCI format 0_1 or DCI format 0_2. If the PUSCH is scheduled by DCI format 0_0, transmission of the PUSCH may be based on at least one antenna port.

[0248] In codebook transmission, the PUSCH may be scheduled by a DCI format. The DCI format may be any of DCI format 0_0, DCI format 0_1, and DCI format 0_2. In codebook transmission, the PUSCH may be configured to be transmitted semi-statically. The terminal device 1 may determine one or more precoders for PUSCH transmission. For example, the precoder may be determined based on at least some or all of an SRS resource indicator (SRI), a transmitted precoding matrix indicator (TPMI), and a transmission rank (transmission rank). For example, the SRI may be provided by a DCI field of an SRS resource indicator of 1 or 2. For example, the TPMI may be provided by a DCI field of precoding information of 1 or 2. For example, the transmission rank may be provided by a DCI field of the number of layers (number of transmission layers). For example, the TPMI and transmission rank may be provided by one or two "precoding information and number of layers" DCI fields. The SRI may be provided by a first higher layer parameter. The TPMI and transmission rank may be provided by a second higher layer parameter. The first higher layer parameter may be srs-ResourceIndicator or srs-ResourceIndicator2. The second higher layer parameter may be precodingAndNumberOfLayers or precodingAndNumberOfLayers2.

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

[0250] If the upper layer parameter usage is set to 'codebook', one or two SRS resource sets are specified in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. The upper layer parameter usage may be set in the upper layer parameter SRS-ResourceSet.

[0251] When one SRS resource set is configured, the SRI and TPMI may be provided by DCI fields. The DCI fields may be one SRS resource indication field and one “precoding information and number of layers” DCI field. The TPMI is used to indicate the precoder. The precoder may be applied across v layers {0,..., v-1}. When multiple SRS resources are configured, one SRS resource may be selected by the SRI. A precoder may correspond to one SRS resource. A transmit precoder (precoder) may be selected from a codebook (uplink codebook). For example, the codebook may have the number of antenna ports. The number of antenna ports may be equal to the higher layer parameter nrofSRS-Ports. When the higher layer parameter txConfig is set to 'codebook', the terminal device 1 may be configured with at least one SRS resource. The indicated SRI may be related to the transmission of the SRS resource identified by the SRI. For example, the indicated SRI may be related to the most recent transmission of the SRS resource identified by the SRI, and the SRS resource may be prior to the PDCCH carrying the SRI.

[0252] If two SRS resource sets are configured, one or two SRIs and one or two TPMIs are , may be given by a DCI field. For example, the DCI field may be an SRS resource indicator The terminal device 1 may apply the indicated SRI and TPMI to one or more PUSCH repetitions. For example, the terminal device 1 may apply the indicated SRI and TPMI to the SRS resource set of the PUSCH repetition. Thus, the indicated SRI and TPMI may apply to one or more PUSCH repetitions. to direct the precoder based on the codepoint in the SRS resource set indication A precoder may be applied to the 0th to v-1th layers. The precoder may correspond to an SRS resource selected by SRI. A resource may be configured for the applicable SRS resource set. For example, when multiple SRS resources are configured for an applied SRS resource set, the precoder may correspond to the SRS resource selected by the corresponding SRI. In one or two TPMIs, the transmission precoder (precoder) may be selected from a codebook (uplink codebook). When two SRIs are indicated, the terminal device 1 may expect the number of antenna ports for the two indicated SRS resources to be the same. The number of SRS resources may be provided by a higher layer parameter. When two SRS resources are configured and the higher layer parameter usage is set to 'codebook', the terminal device 1 does not expect that different numbers of SRS resources are configured in the two SRS resource sets. Good too.

[0253] In codebook transmission, the terminal device 1 may determine a codebook subset. For example, the codebook subset may be determined based at least on the TPMI. The codebook subset may be determined in response to receiving certain higher layer parameters. The certain higher layer parameters may be codebookSubset or codebookSubsetDCI-0-2. Certain upper layer parameters may be set to either 'fullyAndPartialAndNonCoherent', 'partialAndNonCoherent', or 'nonCoherent'. If the upper layer parameter ul-FullPowerTransmission is set to 'fullpowerMode2', AND if some upper layer parameter is set to 'partialAndNonCoherent', AND If the SRS resource set for a 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 (the SRS resource with two ports) may be 'nonCoherent'. The maximum transmission rank (or max rank) may be configured for the PUSCH by the higher layer parameter maxRank or the higher layer parameter maxRankDCI-0-2.

[0254] The terminal device 1 may report a UE capability. If the terminal device 1 reports a UE capability of 'partialAndNonCoherent' transmission, the terminal device 1 may not expect a codebook subset having 'fullyAndPartialAndNonCoherent' to be configured.

[0255] If the terminal device 1 reports a UE capability of 'nonCoherent' transmission, the terminal device 1 may not expect a codebook subset with 'fullyAndPartialAndNonCoherent' or 'partialAndNonCoherent' to be configured.

[0256] If the upper layer parameter nrofSRS-Ports for the codebook indicates that the maximum number of SRS antenna ports to be configured is 2, the terminal device 1 determines whether 'partialAndNonCoherent' is It is not necessary to expect that the higher layer parameters to be set. The higher layer parameters may be codebookSubset or codebookSubsetForDCI-Format0-2. The number of antenna ports may be determined by the higher layer parameter nrofSRS-Ports.

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

[0258] The terminal device 1 uses the SRS resource indicated by the DCI format or the upper layer parameter. The PUSCH may be transmitted using one or more SRS ports (antenna ports) at the source. For example, the SRS port may be the same as the antenna port for PUSCH transmission. The DMRS antenna ports may be determined according to the ordering of the DMRS ports.

[0259] When multiple SRS resources are configured by an SRS resource set, the terminal device 1 The SRS resource set may expect the higher layer parameter nrofSRS-Ports with a value of 'codebook' to be set for these SRS resources. It may be a higher layer parameter SRS-ResourceSet with meter usage.

[0260] If 'fullpowerMode2' is set for the upper layer parameters, one or more SRS resource sets for the codebook with the same or different SRS port numbers SRS resources may be configured. When a codebook is configured and multiple SRS resource sets are configured in an SRS resource set, up to two different spatial relations may be configured for all SRS resources in the SRS resource set for the codebook. When the higher layer parameter 'fullpowerMode2' is set, up to two or four SRS resources may be configured in an SRS resource set for the codebook. Also, up to eight SRS resources may be configured in one SRS resource set. The SRS resource set for the codebook may be an SRS resource set with the higher layer parameter 'usage' set to 'codebook'.

[0261] In non-codebook transmission, the PUSCH is DCI format 0_0, DCI format 0_1, or , may be scheduled by DCI format 0_2. The PUSCH may be set semi-statically. The terminal device 1 sets the precoder and transmission rank of the PUSCH. , may be determined based on the SRI. For example, when multiple SRS resources are configured, the SRI may be provided by one or two SRS resource indications in the DCI. For example, the SRI may be provided by a higher layer parameter. The SRS resource set to be applied to the PUSCH may be defined by an entry in the higher layer parameter. The higher layer parameter may be srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2.

[0262] The terminal device 1 may use one or more SRS resources for SRS transmission. The maximum number of SRS resources in one SRS resource set may be transmitted to the base station device 3 as a UE capability. The SRS resources may be configured for simultaneous transmission in the same OFDM symbol. In one SRS resource set, the maximum number of SRS resources configured for simultaneous transmission in the same OFDM symbol and the maximum number of SRS resources may be determined by the UE capability. Multiple SRS resources transmitted simultaneously may occupy the same resource block. One SRS port may be configured in each SRS resource. One or two SRS resource sets may be configured. The SRS resource set may be set in the upper layer parameter srs-ResourceSetToAddModList with the upper layer parameter usage set to 'nonCodebook' in the upper layer parameter SRS-ResourceSet. If two SRS resource sets are configured, one or two SRIs may be given by the DCI field. The DCI field may be a DCI field for two SRS resource indications.

[0263] The terminal device 1 may apply the indicated SRI to one or more PUSCH repetitions. For example, according to the SRS resource set of the PUSCH repetition, the terminal device 1 may apply the indicated SRI to one or more PUSCH repetitions. Alternatively, it may be applied to multiple PUSCH repetitions. The maximum number of SRS resources per SRS resource set may be four. The maximum number of SRS resources per SRS resource set configured for data transmission is 8. Each of the one or two SRIs indicated is the SRS resource set identified by the SRI. The SRS resource set may be related to the latest transmission of the SRS resource of the set. The SRS transmission may be before the PDCCH carrying the SRI. The terminal device 1 may not expect that different numbers of SRS resources are configured in the two SRS resource sets.

[0264] Multiple PDCCH candidates (PDCCH candidate(s)) are searched for and configured by higher layer parameters. When a search area set is associated with the PDCCH candidate, one PDCCH candidate is used. The upper layer parameter may be a PDCCH candidate that starts earlier among the PDCCH candidates. The upper layer parameter may be searchSpaceLinking.

[0265] For non-codebook transmission, the UE may calculate a precoder. For example, the precoder used for SRS transmission may be calculated based on measurements of the NZP CSI-RS resources. One NZP CSI-RS resource may be configured for the SRS resource set for non-codebook. For example, the SRS resource set for non-codebook may be an SRS resource set with higher layer parameters set to 'nonCodebook'.

[0266] When an aperiodic SRS resource set is configured, 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 of DCI Format 0_1, DCI Format 0_2, DCI Format 1_1, and DCI Format 1_2. A first upper layer parameter may indicate an association between an aperiodic SRS (aperiodic SRS triggering state) and an SRS resource set. The first upper layer parameter, the triggered SRS resource, srs-ResourceSetId, and csi-RS may be configured in the upper layer parameter SRS-ResourceSet. The upper layer parameter csi-RS may indicate the NZP-CSI-RS-ResourceId. The upper layer parameter SRS-ResourceSet associated with the SRS request may be defined by an entry in a list, which is an upper layer parameter. The list, which is an upper layer parameter, may be the upper layer parameter srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2. The terminal device 1 may not be expected to update the precoding information (SRS precoding information). For example, if the gap from the last OFDM symbol of reception of the aperiodic NZP-CSI-RS resource to the first OFDM symbol of aperiodic SRS transmission is 42 OFDM symbols or less, the terminal device 1 may not be expected to update the precoding information.

[0267] If an aperiodic SRS associated with an aperiodic NZP CSI-RS resource is configured, the presence of the associated CSI-RS may be indicated by the SRS request field. If the value of the code is not '00' and the scheduling DCI is cross-carrier scheduled, If the CSI-RS is not used for cross carrier scheduling or cross bandwidth part scheduling, the presence of the CSI-RS may be indicated by the SRS request field.

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

[0269] The terminal device 1 may perform one-to-one mapping. The one-to-one mapping may be a mapping from the SRI to a DMRS port and a mapping from the SRI to a corresponding PUSCH layer {0,...,v-1}. PUSCH layers from 0 to v-1 may be provided, where v may be the number of layers. The number of layers may be set by a higher layer parameter. The terminal device 1 maps the PUSCH to the same SRS port. For example, the SRS ports in the SRS resource indicated by the SRI may be indexed as pi = 1000 + i. For example, the SRS port in the (i+1)-th SRS resource may be pi. Also, the SRS port in the (i+1)-th SRS resource may be pi. The SRS ports at the source may be indexed as pi, where pi is 1000+i. It is also possible.

[0270] In non-codebook transmission, the terminal device 1 may not expect both 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 to be configured. The spatial relation information may be determined by the upper layer parameter. The spatial relation information may be the upper layer parameter spatialRelationInfo. In non-codebook transmission, when at least one SRS resource is configured in an SRS resource set with the upper layer parameter set to 'nonCodebook', the terminal device 1 may be scheduled by DCI format 0_1 or DCI format 0_2.

[0271] One or more SRS resource sets (Sounding Reference Signal resource sets) are The first upper layer parameter may be set by the higher layer parameter SRS-ResourceSet or SRS-PosResourceSet. K SRS resources may be configured in each SRS resource set. K may be an integer greater than or equal to 1. The maximum value of K may be indicated by the UE capability. The maximum value of K may be 16. The adaptability of the SRS resource set may be set by the second upper layer parameter. The second upper layer parameter may be usage. For example, if 'beamManagement' is set for the second upper layer parameter, one SRS resource in each of one or more SRS resource sets may be transmitted at a given time instance. Multiple SRS resources in different SRS resource sets may be transmitted simultaneously. For example, multiple SRS resources with the same time domain behavior in different SRS resource sets of the same BWP may be transmitted simultaneously.

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

[0273] The one or more SRS parameters may be configured by a first higher layer parameter. For example, one or more SRS parameters may be semi-statically configured by a second higher layer parameter. The first higher layer parameter may be SRS-Resource or SRS-PosResource. The second higher layer parameter may determine an SRS resource configuration identity. The second higher layer parameter may be srs-ResourceId or SRS-PosResourceId. The one or more SRS parameters may be , some or all of the first to twentieth upper layer parameters. One or more SRS The parameters are parameters that have the same functions as some or all of the higher layer parameters 1 to 20. One or more SRS parameters may be determined based on the DCI format. It may be set.

[0274] Number of SRS ports N SRS ap may be determined by a third upper layer parameter. The 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 the SRS. The time domain behavior of the resource configuration may be determined by a fourth higher layer parameter. The fourth higher layer parameter may be resourceType. For example, The SRS resource operation may be periodic, semi-persistent, or aperiodic. The periodicity and offset may be determined by a fifth higher layer parameter. The periodicity and offset may be at the slot level. The periodicity and offset may be defined for periodic or semi-persistent SRS resources. The fifth higher layer parameter may be periodicityAndOffset-p or periodicityAndOffset-sp. For example, multiple SRS resources with different periodicities may not be expected to be configured in the same SRS resource set. When the fourth higher layer parameter is set to 'aperiodic', the slot-level offset may be defined by a sixth higher layer parameter. The sixth higher layer parameter may be slotOffset. When the fourth higher layer parameter is set to 'aperiodic', a list of available slot offset values may be defined by a seventh higher layer parameter. The seventh higher layer parameter may be AvailableSlotOffset. The list of available slot offset values may be a list of different available slot offset values from 0 to 4. If the reference slot is n+k, the available slot offset may be an offset from the n+k slot to a certain slot. In a certain slot, an aperiodic SRS resource set may be transmitted. Slot n may be the slot of a triggering DCI. The triggering DCI may trigger the transmission of an aperiodic SRS. Slot k may be determined by a sixth higher layer parameter. The seventh higher layer parameter may be configured with up to four values. In an aperiodic SRS resource set, a slot-level offset may be defined for each SRS resource by the sixth higher layer parameter.

[0275] Furthermore, the number of OFDM symbols in the SRS resource (the number of consecutive OFDM symbols) N SRS symbThe start OFDM symbol (start position in the time domain) of the SRS resource may be defined by an eighth higher layer parameter. The eighth higher layer parameter may be resourceMapping. Also, a repetition factor R fac may be configured by the eighth higher layer parameter. If the number of repetitions is not configured by the eighth higher layer parameter, the number of repetitions may be equal to the number of OFDM symbols in the SRS resource. SRS bandwidth B SRS and C SRS may be defined by the ninth higher layer parameter. If the ninth higher layer parameter is not set, B SRS may be 0. The ninth upper layer parameter may be freqHopping. A partial frequency sounding factor and a starting resource block index for partial frequency sounding may be defined by a tenth upper layer parameter. The tenth upper layer parameter may be FreqScalingFactor and StartRBIndex. The frequency domain position may be defined by an eleventh upper layer parameter. The configurable shift may be defined by a 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 configured by an eighth higher layer parameter. The second number of OFDM symbols may be determined based on the DCI format. If the first number of OFDM symbols is configured and 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 iteration may be set by an eighth upper layer parameter. The number of repetitions may be determined based on the DCI format. If the second number of iterations is determined, the second number of iterations may be used and the first number of iterations may not be used.

[0278] Furthermore, the comb number (transmission comb number) may be defined by a thirteenth upper layer parameter. The thirteenth upper layer parameter may be transmissionComb. The comb number 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 comb offset (transmission comb 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 the initial cyclic shift value) may be set by the 14th higher layer parameter. The initial cyclic shift value (initial cyclic shift value) may be determined based on the DCI format. When the first initial cyclic shift value is set and the second initial cyclic shift value is determined, the second initial cyclic shift value may be used and the first initial cyclic shift value may not be used. When the first initial cyclic shift value is set and the second initial cyclic shift value is determined, the sum of the first and second initial cyclic shift values may be used.

[0280] The third cyclic shift (or initial cyclic shift value) is one or more values One of the one or more values may be determined based on the OFDM symbol in the SRS resource. It may be the number of OFDM symbols that make up the SRS resource. may be the iteration count (the iteration count for the SRS). One of the values is , may be the maximum number of cyclic shifts. That is, the third cyclic shift ( Alternatively, the cyclic shift initial value may be determined based on some or all of the number of OFDM symbols in the SRS resource, the number of repetitions, and the maximum number of cyclic shifts.

[0281] When the first cyclic shift initial value is set and the third cyclic shift initial value is determined, the third cyclic shift initial value may be used and the first cyclic shift initial value may not be used. When the first cyclic shift initial value is set and when the third cyclic shift initial value is determined, 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 configured by the sixteenth higher layer parameter. The second SRS sequence ID may be determined based on the DCI format. If the first SRS sequence ID is configured and the second SRS sequence ID is determined, the second SRS sequence ID may be used, and the first SRS sequence ID may not be used. If the first SRS sequence ID is configured and the second SRS sequence ID is determined, the sum of the first SRS sequence ID and the second SRS sequence ID may be used. stomach.

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

[0284] Furthermore, a spatial relation between a reference signal (RS) and an SRS may be defined by a 17th higher layer parameter. For example, the spatial relation between a reference RS and a target SRS may be configured by the 17th higher layer parameter. The 17th higher layer parameter may be spatialRelationInfo or spatialRelationInfoPos. The spatial relation configuration may include an ID of the reference signal (reference RS). The reference signal may be an SS / PBCH block. The reference signal may be a CSI-RS. The reference signal may be a certain SRS. The reference signal may be configured in one serving cell. For example, one serving cell may be indicated by the 18th higher layer parameter. A certain SRS may be configured in one BWP in one serving cell. For example, one serving cell may be the same serving cell as the target SRS. For example, one BWP may be configured by the 19th higher 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 configured by the first upper layer parameter. For example, the first upper layer parameter may be SRS-Resource or SRS-PosResource.

[0285] If the 20th upper layer parameter is not set, the number of combs is 2, 4, or 8. If the 20th upper layer parameter is set, the number of combs may be 2, 4, 8, and If the twentieth upper layer parameter is not set, the fourteenth upper layer parameter may be any of cyclicShift-n2, cyclicShift-n4, and cyclicShift-n8. If the twentieth upper layer parameter is set, the fourteenth upper layer parameter may be any of cyclicShift-n2, cyclicShift-n4, cyclicShift-n8, cyclicShift-n16, and cyclicShift-n16. It may be either of the following.

[0286] The one or more SRS parameters are the second upper layer parameter to the twentieth upper layer parameter The SRS transmission may include some or all of the above. The SRS transmission may be the transmission of an SRS resource. The SRS transmission may be the transmission of an SRS resource set. The SRS transmission may be an SRS resource transmission. The SRS transmission may be an SRS resource set transmission.

[0287] An SRS resource may occupy one or more OFDM symbols. For example, an SRS resource is the last 6 OFDM symbols of one slot, N SRS symb may occupy N OFDM symbols. SRS symb The number of SRS resources can be 1, 2, or 4. For example, an SRS resource can be For example, the SRS resource may occupy any of the OFDM symbol positions in the lot. , N in one slot SRS symb may occupy N adjacent OFDM symbols. SRS ap pieces An antenna port may be mapped to each OFDM symbol of the resource. SRS ap Is 4 too For example, N of SRS resources SRSap N antenna ports may be mapped to each OFDM symbol of the resource. SRS symb N can be 1, 2, 4, 8, or 12. SRS symb N can be 1, 2, 4, 8, 10, 12, or 14. SRS ap If is 8, then N SRS symb can be even. For example, N SRS ap,1 The antenna ports may be mapped to slots with even slot indices. For example, N SRS ap,2 N antenna ports may be mapped to slots with odd slot indices. SRS ap is N SRS ap,1 + N SRS ap,2 may be.

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

[0289] When a PUSCH or PUCCH transmission overlaps with an SRS transmission, the SRS may not be transmitted in the overlapping OFDM symbol. For example, when a PUSCH or PUCCH transmission overlaps with an SRS transmission in the time domain in one serving cell, the SRS may not be transmitted in the overlapping OFDM symbol. In addition, if PUSCH transmission or PUCCH transmission overlaps with SRS transmission, SRS may not be transmitted. For example, SRS ap If is 8, If the PUSCH transmission or PUCCH transmission overlaps with the SRS, the SRS may not be transmitted. SRS ap If is 8 and if a PUSCH or PUCCH transmission overlaps with an SRS, the SRS may not be transmitted in the overlapping OFDM symbol set. A set may consist of two OFDM symbols.

[0290] If 'periodic' is set for the upper layer parameter resourceType, one Target SRS resource with spatial domain transmission filter If a higher layer parameter contains an ID, then a spatial region A target SRS resource with a spatial domain filter may be transmitted. One spatial domain filter may be used for receiving or transmitting a reference reference signal (reference signal). The reference reference signal may be an SS / PBCH block, a CSI-RS, or an SRS. For example, if a certain higher layer parameter includes any one of the IDs 'ssb-Index', 'ssb-IndexServing', or 'ssb-IndexNcell', the reference reference signal may be an SS / PBCH block. For example, if a certain higher layer parameter includes any one of the IDs 'csi-RS-Index' and 'csi-RS-IndexServing', the reference reference signal may be a periodic CSI-RS or a semi-persistent CSI-RS. For example, if a certain higher layer parameter includes any one of the IDs 'srs' and 'srs-spatialRelation', the reference reference signal may be a periodic SRS. The reference reference signal may be a DL PRS.

[0291] If 'semi-persistent' is set for the upper layer parameter resourceType, the first slot (n+3Nsubframe,μ slot SRS transmission may start from the first slot after the first slot. For example, the assumptions for SRS transmission may be applied from the first slot. Slot n may be a slot in which a PUCCH is transmitted. For example, the PUCCH may have HARQ-ACK information corresponding to a PDSCH carrying an activation command. That is, when an activation command is received, SRS transmission may start from the first slot. Also, when an activation command is received, an assumption for SRS transmission may be applied from the first slot. The activation command may include an assumption of spatial relationship (or spatial relationship). The assumption of spatial relationship may be provided by a list. The list may be a list of reference signal IDs. For example, each reference signal ID may refer to one of an SS / PBCH block, an NZP CSI-RS resource, or an SRS resource. The NZP CSI-RS resource may be configured in one serving cell. The SRS resource may be configured in one serving cell and one uplink BWP. For example, one serving cell may be indicated by a first field in the activation command. For example, one uplink BWP may be indicated by a 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, one serving cell may be the same serving cell as the SRS resource set. For example, one uplink BWP may be the same uplink BWP as the SRS resource set.

[0292] One SRS resource in the activated SRS resource set (resource set) is the superior If set by the layer parameters, the ID of the first reference signal in the activation command is It may be envisaged to overwrite the ID of the second reference signal in the layer parameters. The layer parameter can be either spatialRelationInfo or spatialRelationInfoPos. stomach.

[0293] If a deactivation command is received and if a PUCCH is transmitted in slot n, the suspension of SRS transmission may be applied from the first slot. The deactivation command may be conveyed by a PDSCH. The PUCCH may include HARQ-ACK information corresponding to the PDSCH. The suspension of SRS transmission corresponding to the deactivated SRS resource set may be applied from the first slot. The first slot may be n+3N. subframe,μ slot μ may be the first slot after the slot. μ may be the SCS setting for the PUCCH.

[0294] Terminal device 1 sets up an active semi-persistent SRS resource A semi-persistent SRS resource configuration may be considered active in one uplink BWP if it has a deactivation command and does not receive a deactivation command. The uplink BWP may be active. It has an active semi-persistent SRS resource configuration and an inactive When an activate command is received, the configuration of the semi-persistent SRS resource may be suspended.

[0295] If 'aperiodic' is set for the higher layer parameter resourceType, some or all of actions 1 to 7 may apply.

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

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

[0298] Action 3 may be that aperiodic SRS without data and CSI is triggered. DCI format 0_1 and DCI format 0_2 may trigger aperiodic SRS. The periodic SRS may not include data and CSI.

[0299] In operation 4, the terminal device 1 may transmit an SRS in each of one or more SRS resource sets and in the t+1th available slot. The SRS may be an aperiodic SRS. The one or more SRS resource sets may be triggered by a DCI. The DCI triggering the aperiodic SRS may be received in the first slot n. At least one resource set (SRS resource set) may be configured by an upper layer parameter availableSlotOffset. The available slot may be counted from the second slot. The second slot may be determined based on at least the first slot and an offset value (slot k). The offset value may be configured by a second upper layer parameter. The second upper layer parameter may be slotOffset. The second upper layer parameter may be configured for each of the one or more triggered SRS resource sets. The available slot may be a slot that satisfies a condition. The condition may be that a UL symbol or a flexible symbol exists for time domain positions corresponding to multiple SRS resources in one resource set (SRS resource set). The condition may be that the UE capability of a minimum timing requirement is satisfied. The minimum timing requirement may be the minimum timing requirement between the triggering PDCCH and all SRS resources in one resource set. From the first OFDM symbol carrying the DCI of the SRS request to the last OFDM symbol of the triggered SRS resource set, the terminal device 1 may not expect to receive the SFI indication, the UL cancellation indication, and dynamic scheduling of the downlink channel / signal in the flexible symbol. From the first OFDM symbol carrying the DCI of the SRS request to the last OFDM symbol of the triggered SRS resource set, the terminal device 1 may not expect to change the determination of the available slot. The time t may be set by a third higher layer parameter. The third higher layer parameter may be availableSlotOffset.For example, t may be configured with up to four values for each of one or more triggered SRS resource sets. t may be based on the subcarrier spacing of the triggered SRS transmission. For SRS resource sets for which the third higher layer parameter is not configured, t may be 0.

[0300] Operation 5 may be transmitting an SRS in each of the one or more SRS resource sets and in the first slot. The SRS may be an aperiodic SRS. A DCI triggering the aperiodic SRS may be received in slot n. The first higher layer parameter is There may be no resource set (SRS resource set) to be configured. A second higher layer parameter may be configured. The second higher layer parameter may be ca-SlotOffset. The lot may be determined based at least on slot n and slot k.

[0301] Operation 6 may be transmitting the target SRS resource with one spatial domain filter. stomach.

[0302] Operation 7 may be that the spatial relationship update for one SRS resource is applied to an SRS transmission. subframe,μ slot The update command may start from the first slot after the specified time slot. μ may be the SCS setting of the PUCCH. The update command is carried by the PDSCH. The HARQ-ACK corresponding to the PDSCH may be transmitted in slot n. One SRS resource may be set by the higher layer parameter SRS-Resource. The terminal device 1 may receive an update command The spatial relation update command may be received. The spatial relationship assumption may be provided by a list, which may refer to one or more reference signal IDs.

[0303] Setting 'aperiodic' for the higher layer parameter resourceType may indicate that the SRS resource corresponds to an aperiodic SRS (non-periodic). Setting 'semi-persistent' for the higher layer parameter resourceType may indicate that the SRS resource corresponds to a semi-persistent SRS (semi-persistent). Setting 'periodic' for the higher layer parameter resourceType may indicate that the SRS resource corresponds to a periodic SRS (periodic).

[0304] The time domain behavior corresponding to one or more SRS resources in one SRS resource set may not be expected to differ. For example, different time domain behaviors may not be expected to be configured for one or more SRS resources in one SRS resource set. Different time domain behaviors may not be expected to be configured between SRS resources and their associated SRS resource sets.

[0305] It may not be expected that the first SRS resource and the second SRS resource on one carrier overlap one or more OFDM symbols. For example, the first SRS resource may be configured by the higher layer parameter SRS-PosResource. The second SRS resource may be configured by the higher layer parameter SRS-Resource. The resourceType of both the first SRS resource and the second SRS resource may be 'periodic'.

[0306] The first SRS may not be expected to trigger or activate transmission of the first SRS. For example, the first SRS may be an SRS in one or more OFDM symbols. One or more OFDM symbols may overlap the first SRS resource and the second SRS resource. For example, the first SRS resource may be configured by the higher layer parameter SRS-PosResource. The second SRS resource may be configured by the higher layer parameter SRS-Resource. The resourceType of both the first SRS resource and the second SRS resource may be 'semi-persistent' or 'aperiodic'.

[0307] In one carrier, configuration of multiple OFDM symbols overlapping with multiple SRS resources may not be expected. Multiple SRS resources may be configured by the higher layer parameter SRS-PosResource where the resourceType of the multiple SRS resources is 'periodic'.

[0308] A single carrier may not be expected to trigger or activate SRS transmission in multiple OFDM symbols. Multiple OFDM symbols may be used to transmit multiple SRS links. The SRS resources may be OFDM symbols that overlap with the source. The SRS resources may be configured by the higher layer parameter SRS-PosResource, where the resourceType of the SRS resources is 'semi-persistent' or 'aperiodic'.

[0309] For PUCCH and SRS on one carrier, the terminal device 1 may not transmit an SRS when a first SRS is configured. The first SRS may be configured in the same OFDM symbol as the PUCCH. The PUCCH may carry only a CSI report. The PUCCH may carry only an L1-RSRP report. The PUCCH may carry only an L1-SINR report. The terminal device 1 may not transmit an SRS when transmission of a second SRS is configured or triggered. The second SRS may be either a semi-persistent SRS or a periodic SRS configured to be transmitted in the same OFDM symbol as the PUCCH. The second SRS may be an aperiodic SRS triggered to be transmitted in the same OFDM symbol as the PUCCH. The PUCCH may carry some or all of an HARQ-ACK, a link recovery request, and a scheduling request (SR). If the SRS is not transmitted due to overlap with the PUCCH, only the SRS symbols that overlap with the PUCCH symbols may be dropped. SRS ap If is 8, SRS symbols that overlap with PUCCH symbols and SRS symbols that do not overlap with PUCCH symbols may be dropped. If an aperiodic SRS is triggered to be transmitted because it overlaps with PUCCH, PUCCH may not be transmitted.

[0310] One SRS resource corresponding to the resourceType set to 'aperiodic' is periodic, Alternatively, if the transmission of semi-persistent SRS is triggered in one or more OFDM symbols in which it is configured, the terminal device 1 may transmit a non-periodic SRS resource, and the periodic or semi-persistent SRS in the overlapping OFDM symbols may be dropped. Periodic or semi-persistent SRS in the symbol N may be transmitted. SRS apIf N is 8, periodic or semi-persistent SRS in non-overlapping OFDM symbols may be dropped. Dropping may also mean not transmitting. If an SRS resource corresponding to resourceType set to 'semi-persistent' is triggered in one or more OFDM symbols for which periodic SRS transmission is configured, the terminal device 1 may transmit the semi-persistent SRS resource, and periodic SRS in overlapping OFDM symbols may be dropped. Periodic SRS in non-overlapping OFDM symbols may be transmitted. N SRS ap If is 8, periodic or semi-persistent SRS in overlapping OFDM symbol sets may be dropped.

[0311] A spatial relation (spatialRelationInfo) is activated or updated for the first SRS resource. When the spatial relationship is updated, the spatial relationship may be applied to the 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 with the same SRS resource ID. The second SRS resource may be a semi-persistent SRS resource or an aperiodic SRS resource with the same SRS resource ID for all BWPs in the determined multiple CCs. The first SRS resource may be configured by a higher layer parameter. The spatial relationship may be activated or updated by the MAC CE for a set of multiple CCs (component carriers) and / or multiple BWPs. The list of multiple CCs may be determined by a higher layer parameter. The higher layer parameter may be simultaneousSpatial-UpdatedList1 or simultaneousSpatial-UpdatedList2.

[0312] For one SRS resource, the repetition factor Rfac may be set The number of repetitions may be set by a higher layer parameter. The number of repetitions may be 1, 2, or 4. The number of repetitions may be 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, or 14. There may be a repetition count R fac may be set by the upper layer parameter resourceMapping in the upper layer parameter SRS-Resource. fac may be determined based on the DCI format. SRS symb It may be the following:

[0313] The number of repetitions is N SRS symb The same as N may be used when frequency hopping is not set. SRS symb The same as above may mean that one or both of cyclic shift hopping and sequence hopping are not configured. Each of the multiple antenna ports of one SRS resource is mapped to the first set. For example, if frequency hopping is not configured, each of the multiple antenna ports of one SRS resource in each slot may be N SRS symb All OFDM symbols The first set may be mapped to a first set in one or more sub-sets. The first set may be a set of subcarriers, one or more of which may be subcarriers in the second set. The second set may be a set of one or more PRBs. For example, if frequency hopping is not configured within one SRS resource in each slot, each of the multiple antenna ports of one SRS resource in each slot may be N SRS symbAll of the OFDM symbols may be mapped to the first set.

[0314] The first one or more antenna ports may correspond to a first cyclic shift (CS) set. For example, if cyclic shift hopping is not configured, the first one or more antenna ports in each slot may correspond to N SRS symb The first CS in all OFDM symbols The first CS set may correspond to a set of cyclic shifts αi corresponding to the first one or more antenna ports pi. For example, if cyclic shift hopping is not configured within one SRS resource in each slot, The first one or more antenna ports in SRS symb In all OFDM symbols It may correspond to the first CS set.

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

[0316] Furthermore, if cyclic shift hopping is configured within one SRS resource in each slot and there is no repetition (the number of repetitions is 1), One or more antenna ports of the OFDM signal are mapped to different CS sets in each OFDM symbol. The CS set may be a cyclic set corresponding to the first one or more antenna ports pi. For different CS sets, the same transmission comb value may be assumed.

[0317] When frequency hopping and repetition is configured, one or more access points of one SRS resource may be used. Each of the antenna ports receives the signal in the OFDM symbol included in the nth OFDM symbol set. , may be mapped to subcarriers included in the n-th subcarrier set. The n-th OFDM symbol set is R fac R fac may be the number of repetitions. The nth subcarrier set may be composed of one or more subcarriers. n may be a large integer equal to or greater than 1. For example, n may be N SRS symb / R fac The n-th subcarrier set may be a subcarrier set different from the subcarrier sets other than the n-th subcarrier set. When frequency hopping and repetition are configured within one SRS resource in each slot, each of the antenna ports of one SRS resource in each slot is R fac The subcarriers may be mapped to the same subcarrier set within each of the pairs of OFDM symbols, and frequency hopping between the two pairs may follow an SRS frequency hopping pattern. Frequency hopping according to the SRS frequency hopping pattern may mean that frequency hopping is applied, performed, or configured.

[0318] If cyclic shift hopping and repetition is configured, one or more antennas The port (SRS port) is the nth OFDM symbol in the nth OFDM symbol set. The nth OFDM symbol set may correspond to a cyclic shift of R facadjacent It may be a pair of OFDM symbols. fac can be the number of repetitions. The click shift may be the nth CS set, where n may be a large integer greater than or equal to 1. For example, the maximum number of n is N SRS symb / R fac When cyclic shift hopping and repetition are configured within one SRS resource in each slot, the antenna port of one SRS resource in each slot may be fac Within a pair of OFDM symbols, the same cyclic shift may be used, and cyclic shift hopping may be performed between the two pairs. The cyclic shift hopping may follow a cyclic shift hopping pattern. The cyclic shift hopping may follow a cyclic shift hopping pattern, which may mean that the cyclic shift hopping is applied, performed, or configured. Whether the cyclic shift hopping is applied may be configured by a higher layer parameter.

[0319] If the number of antenna ports is 8, N SRS symb / R fac can be an even number. If the number of entries is 8, then N SRS symb / R fac may be 2 or more. When the number of antenna ports is 8, a first antenna port set and a second antenna port set may be determined. The antenna port set may consist of four antenna ports. The first subcarrier set to which the first antenna port set is mapped in the first OFDM symbol may be determined. The antenna port set may be the same as the second subcarrier set mapped in the second OFDM symbol. The first OFDM symbol may be different from the second OFDM symbol. When the number of antenna ports is 8, cyclic shift hopping may be applied.

[0320] For example, the antenna ports included in the first antenna port set of one SRS resource Each of the first sub-bands is a first OFDM symbol included in a first OFDM symbol set. The antennas included in the second antenna port set may be mapped to the second carrier set. Each of the antenna ports in the first antenna port set may be mapped to a first subcarrier set in a second OFDM symbol included in the first OFDM symbol set. Each of the antenna ports in the first antenna port set may be mapped to a second subcarrier set in a first OFDM symbol included in the second OFDM symbol set. Each of the antenna ports in the second antenna port set may be mapped to a second subcarrier set in a second OFDM symbol included in the second OFDM symbol set. Switching the mapping from the first subcarrier set to the second subcarrier set may be referred to as frequency hopping. That is, when the number of antenna ports is 8, N SRS symb / R fac Frequency hopping may be applied to each OFDM symbol. An OFDM symbol set may consist of two or more 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 four or less, the first hopping frequency (first SRS hopping frequency) is used. If the number of antenna ports is 8, the second hopping pattern may be applied. A hopping frequency (second SRS hopping pattern) may be applied. The first SRS hopping pattern may be different from the second SRS hopping pattern.

[0322] Aperiodic SRS resources with intra-slot frequency hopping within one BWP are configured. If the number of repetitions is 1 and frequency hopping is configured, full hopping is also possible. The full hopping bandwidth is N SRS symb It may be sounded in equal-size subbands across the symbol. The bandwidth may be sounded over two pairs of equal-sized subbands. Each of the two pairs is R fac Each of the antenna ports of the SRS resource may be mapped to the same subcarrier set within each OFDM symbol set. An OFDM symbol set is a set of R fac A subcarrier set may be a set of one or more subcarriers. fac The pair of adjacent OFDM symbols may be an OFDM symbol of the resource.

[0323] Periodic or semi-persistent SRS resources may be configured with inter-slot or intra-slot hopping within one BWP. The SRS resources may occupy the same OFDM symbol position in each slot. An N-symbol SRS resource may occupy the same OFDM symbol position in each slot. N SRS symb If is 4, and the number of iterations is If the number is 2 and frequency hopping is configured, then intra-slot hopping is used. Inter-slot hopping may be supported for each of the multiple antenna ports, each of which may be configured to use a different sub-port across two pairs in each slot. Each of the two pairs may be mapped to a carrier set R fac adjacent OFDM Each of the antenna ports of the SRS resource may be a symbol within each pair. In addition, the antenna port of the SRS resource may be mapped to the same subcarrier set. A first portion of the SRS may be mapped to a first set of subcarriers within each pair. A second portion of the antenna ports' resources may be mapped to a second set of subcarriers within each pair.

[0324] Periodic or semi-persistent SRS link with cyclic shift hopping within one BWP The SRS resource may be set to the same OFDM symbol position in each slot. The N-symbol SRS resource may occupy the same OFDM symbol position in each slot. SRS symb If R is 4, the number of repetitions is 2, and cyclic shift hopping is configured, one or more antenna ports may correspond to different CS sets across two pairs in each slot. Each of the two pairs corresponds to R fac adjacent OFDM symbols. One or more antenna ports may be mapped to the same CS set within each pair. Also, a first portion of the antenna ports of the SRS resources may be mapped to a first CS set within each pair. A second portion of the antenna ports of the SRS resources may be mapped to a second CS set within each pair.

[0325] SRS resources may be configured by higher layer parameters. For example, For example, the higher layer parameter may be SRS-PosResource. The number of antenna ports for the SRS resource may be determined. The number of consecutive OFDM symbols for the SRS resource may be determined. The number of consecutive OFDM symbols for the SRS resource may be determined. A starting position in the frequency domain for the SRS resource may be determined. A comb number may be determined for the SRS resource. A maximum number of cyclic shifts may be determined for the SRS resource. An SRS sequence length may be determined for the SRS resource.

[0326] An SRS resource may consist of one or more elements. Number of antenna ports N SRS ap and the number of consecutive OFDM symbols N SRS symb The number of antenna ports N may be part or all of the start position l0 in the time domain and the start position k0 in the frequency domain. SRS ap may be the number of antenna ports for SRS. For example, the number of antenna ports N SRS ap may be provided by a first higher layer parameter. The first higher layer parameter may be nrofSRS-Ports. The number of antenna ports N SRS ap may be any of 1, 2, 4, and 8. The antenna port pi is the number of antenna ports N SRS ap For example, i may range from 0 to N SRS ap The value of the antenna port pi may be a value up to -1, or the antenna port pi may be i+1000. The antenna port pi is determined based on the number of antenna ports N SRS ap may be determined based at least on whether the first higher layer parameter is provided. If the first higher layer parameter is not provided, the number of antenna ports N SRS ap may be 1. The port may be any of 1000, 1001, 1002, 1003, 1004, 1005, 1006, or 1007.

[0327] The number of consecutive OFDM symbols, N SRS symb may be 1, 2, 4, 8, or 12. For example, the number of consecutive OFDM symbols N SRS symb may be determined by an upper layer parameter. The upper layer parameter may be nrofSymbols. The upper layer parameter may be the upper layer parameter resourceMapping, which includes the field nrofSymbols.

[0328] The starting position l0 of the time domain is N slot symb -1-l offset The offset may be given by Tol offset can be an integer between 0 and 13. offset is the slot's You may count backwards from the beginning. offset may be determined by a higher layer parameter. The higher layer parameter may be resourceMapping. The meter may include a startPosition field. offset is N SRS symb It may be -1 or greater.

[0329] A sounding reference signal sequence (SRS) may be generated. For example, one SRS sequence may be generated for one SRS resource. (pi) (n,l') is It may be generated by some or all of Equation 1, Equation 2, Equation 3, and Equation 4.

number

number

number

number

[0330] In Formula 1, n may be 0 or more, and M SRS SC,b M may be less than or equal to -1. SRS SC,b may be the number of subcarriers. SRS SC,b may be the length of the SRS sequence. The index l' of the ball is from 0 to N SRS symb It may be an index up to -1. δ in log2(K TC ) may be the number of combs K TC is one of the values 2, 4, or 8. Number of combs K TC may be determined by higher layer parameters. The layer parameter may be transmissionComb.

[0331] In Equation 1, Equation 2, and Equation 3, u may be a group number. In Equation 1, Equation 2, and Equation 3, v may be a base sequence number in one group. The group number may be an integer from 0 to 29. One group number may correspond to one group. One base sequence number may correspond to one base sequence. In Equation 4, q may be determined based at least on the group number u and the base sequence number v. N ZC is a value For example, a value M SRS SC,b may be.

[0332] The cyclic shift αi is the cyclic shift for antenna port pi. For example, the antenna port p and the cyclic shift αi may be determined for each i. The cyclic shift αi may be determined according to Equation 5.

[0333] α' may be a cyclic shift initial value. If cyclic shift hopping is not applied, α' may be 0. For example, the cyclic shift initial value may be determined in the DCI format. The cyclic shift initial value is 2πR fac / N SRS symb Yes For example, when cyclic shift hopping is applied, the initial cyclic shift value is R fac And, N SRS symb It may be determined based on one or both of the following:

[0334] The index l'' may be l'. l'' is the floor(l' / R fac ), where l'' is a vector of {0,1,..., N SRS symb / R fac −1}, i.e., l″ may be an index in the time domain.

number

[0335] Maximum number of cyclic shifts (max value) n CS,max SRS is the number of combs, K TC Determined based on For example, K TC If is 2, then n CS,max SRS may be 8. For example, K TC If is 4, then n CS,max SRS may be 12. For example, K TC If is 8, then nCS,max SRS may be 6. CS,i SRS may be determined by any of Equation 6, Equation 7, and Equation 8.

number

number

number

[0336] For example, if condition 1 is met, then n CS,i SRS may be determined by Equation 6. For example, Condition 1 is the number of antenna ports N SRS ap is 4 and the maximum number of cyclic shifts is n CS,max SRS The condition 1 may be that the number of antenna ports N SRS ap is 8, or Maximum number of cyclic shifts n CS,max SRS Condition 1 can be Number of antenna ports N SRS ap is 8 and the maximum number of cyclic shifts is n CS,max SRS For example, if condition 2 is met, then n CS,i SRS may be determined by Equation 7. Condition 2 is the number of antenna ports N SRS ap Condition 2 is also true. , number of antenna ports N SRS ap is 8 and the maximum number of cyclic shifts is n CS,max SRS The second condition is that the number of antenna ports NSRS ap is 8 and the maximum number of cyclic shifts is n CS,max SRS For example, if condition 1 is met, , and if condition 2 is satisfied, n CS,i SRS may be determined by Equation 6. Also, if condition 1 is met and condition 2 is met, n CS,i SRS is determined by Eq. 7 If condition 1 is not met and condition 2 is not met, then n CS,i SRS is expressed by Equation 8. Condition 2 may be omitted. For example, n CS,i SRS is either Equation 6 or Equation 8 The determination may be made by:

[0337] n CS SRS may be called the cyclic shift initial value. CS SRS is from 0 to n CS,max SRS n can be an integer up to -1. CS SRS may be determined by higher layer parameters. The upper layer parameter may be transmissionComb. CS SRS may be determined based on the upper layer parameter transmissionComb and whether cyclic shift hopping is applied. The initial cyclic shift value is a value independent of the antenna port, and is determined based on the cyclic shift αi or n CS,i SRS It may be a value for determining

[0338] The initial value of the cyclic shift is determined by the upper layer parameter transmissionComb and the number of consecutive OFDM symbols N SRS symb and the number of repetitions Rfac and the maximum number of cyclic shifts n CS,max SRS Whether cyclic shift hopping is applied may be configured by a higher layer parameter. If cyclic shift hopping is not applied, the cyclic shift initial value may be determined based on the higher layer parameter transmissionComb. If cyclic shift hopping is applied, the cyclic shift initial value may be determined based on the higher layer parameter transmissionComb and the number N of consecutive OFDM symbols. SRS symb and the number of repetitions R fac and the maximum number of cyclic shifts n CS,max SRS and may be determined based at least in part or in whole on:

[0339] The initial value of the cyclic shift is the number of consecutive OFDM symbols N SRS symb and the number of repetitions R fac and the maximum number of cyclic shifts n CS,max SRS For example, if cyclic shift hopping is not applied, the cyclic shift initial value may be 0. If cyclic shift hopping is applied, the cyclic shift initial value may be 0. In this case, the initial value of the cyclic shift is the number of consecutive OFDM symbols N SRS symb and the number of repetitions R fac and the maximum number of cyclic shifts n CS,max SRS For example, the cyclic shift initial value may be determined based on at least some or all of the symbol index l''. Every n CS’ may be increased by n CS SRS is n CS’ It may be the sum of l'' and a value provided by the higher layer parameter transmissionComb.

[0340] The initial cyclic shift value may be determined based at least on the DCI format. For example, if cyclic shift hopping is not applied, the cyclic shift initial value may be 0. If cyclic shift hopping is applied, the cyclic shift The initial clock shift value may be determined based at least on the DCI format. , n CS SRS may be the sum of the cyclic shift initial value and a value provided by the upper layer parameter transmissionComb.

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

[0342] The sequence number u may be determined based at least on the OFDM symbol index l′. The sequence number u may also be determined based on n SRS ID For example, the sequence group may be determined based on the index l′ of the OFDM symbol. The OFDM symbol index l' may change (hop). may correspond to antenna port pi. For example, the index i indicates the OFDM symbol The index of the rule may be determined.

[0343] The sequence ID is the number of consecutive OFDM symbols N SRS symb and the number of repetitions R fac The sequence ID may be determined based on at least one or both of the following: fac For each symbol It may be changed.

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

number

[0345] β SRS may be a scaling factor (or amplitude scaling factor). The length of the SRS sequence M SRSSC,b is the number of combs, K TC and the number of subcarriers included in one resource block, N RB SC and may be determined based at least on:

[0346] Frequency position K of resource element TC k'+k (pi) 0 varies depending on the antenna port pi Frequency position K TC k'+k (pi) 0 may be one or more subcarriers. Frequency position K TC k'+k (pi) 0 may be one subcarrier set. For example, k (pi) 0 may be determined based at least on the antenna port pi. (pi) 0 is k (pi) TC may be determined based at least on k (pi) TC is either Equation 10 or Equation 11. The determination may be made by:

number

number

[0347] For example, if condition 3 is met, k (pi) TC may be determined by Equation 10. For example, Condition 3 is SRS ap is 4 and the maximum number of cyclic shifts is n CS,max SRS The condition 3 may be that the number of antenna ports N SRS ap is 4 and the maximum number of cyclic shifts is n CSSRS n CS,max SRS / 2 to n CS,max SRS -1, and the antenna port pi may be one of {1001, 1003}. For example, if condition 3 is not met, k (pi) TC is k bar TC The comb number offset k may be bar TC is an upper layer parameter The upper layer parameter may be transmissionComb.

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

[0349] The SRS sequence may be determined based at least on the first sequence. For example, the first sequence may be , +1, -1, +j, and -j. For example, the first sequence may be a vector containing values of +1 and / or -1. The length of the vector, N, can be either 2 or 4. The length N of the first sequence may be the number of subcarriers. The first sequence may be a matrix containing some or all of the values +1, -1, +j, and -j. The first sequence may be one of +1 and -1 or Alternatively, the matrix may be a matrix including both values. For example, the matrix may have 2 rows and N columns. Alternatively, the matrix may have N rows and 2 columns. For example, the first sequence corresponding to index k' may be applied to the second sequence corresponding to index k. For example, the second sequence corresponding to index k may be multiplied by the first sequence corresponding to index k'. Index k' is expressed as floor(kN / M SRS SC,b ) or mod(k,N). For example, a first sequence corresponding to index k' and index l' may be applied to a third sequence corresponding to index k and index l. For example, a third sequence corresponding to index k and index l may be multiplied by a first sequence corresponding to index k' and index l'. Index l' may be expressed as floor(l*2 / N SRS symb ) Also, the index l' may be mod(l,2). "*" may represent multiplication. The SRS sequence may be determined based at least on the first sequence. The SRS sequence may be determined based at least on the second sequence.

[0350] FIG. 9 illustrates an example of cyclic shift hopping for SRS according to one aspect of this embodiment. In one slot, an SRS resource 900 may be determined. The SRS resource 900 may be transmitted. An SRS corresponding to the SRS resource 900 may be transmitted. The SRS may be transmitted in the SRS resource set 900. The SRS resource 900 may be associated with a non-periodic SRS. The SRS resource 900 may be associated with a periodic SRS. The SRS resource 900 may be associated with a semi-persistent SRS. That is, the resourceType of the SRS resource 900 may be set to 'aperiodic'. , 'semi-persistent', or 'periodic' may be set. An SRS resource 900 to which one or more SRS sequences are mapped may be transmitted. An SRS resource 900 to which one or more SRSs are mapped may be transmitted. The SRS resource 900 may be indicated by an SRI in the DCI. The SRS resource 900 may be identified by the SRI. The SRS resource 900 may be indicated by a higher layer parameter. For example, the higher 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 1, 2, 4, or 8 ports. For example, the SRS ports in the SRS resource 900 may be indexed as pi = 1000 + i. The SRS resource (resource) 900 may be one of K SRS resources included in one SRS resource set. One or more SRS parameters for the SRS resource 900 may be configured. For example, one or more SRS parameters may be configured by an SRS-Resource or an SRS-PorResource corresponding to the SRS resource 900. The SRS resource 900 may be a target SRS resource. The SRS resource 900 may be configured by higher layer parameters. For example, the SRS resource 900 may be configured in one serving cell and / or one uplink BWP. The SRS resource 900 may have one spatial domain filter.

[0351] The SRS may be transmitted in the SRS resource 900. The SRS sequence may be mapped to resource elements. 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. One block (a block marked with "1" or "-1") in FIG. 9 is one resource element. That is, the horizontal axis in FIG. 9 may be the index l' of the OFDM symbol, and the vertical axis in FIG. 9 may be the index k' of the subcarrier. The vertical axis may be an index for the length of the SRS sequence.

[0352] The number N of consecutive OFDM symbols for the SRS resource 900 SRS symb may be 4. SRS resource 900 may consist of at least OFDM symbol 910, OFDM symbol 911, OFDM symbol 912, and OFDM symbol 913. SRS resource 900 may 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 may be adjacent OFDM symbols.

[0353] Repetition factor R for SRS resource 900 fac may be 2. OFDM symbol set 920 may be composed of OFDM symbol 910 and OFDM symbol 911. OFDM symbol set 921 may be composed of OFDM symbol 912 and OFDM symbol 913. Each of OFDM symbol set 920 and OFDM symbol set 921 may be composed of R fac It may be composed of OFDM symbols.

[0354] The number of subcarriers for the SRS resource 900 is M SRS SC,b In FIG. SRS SC,b The length of the SRS sequence in FIG. 9 may be 6.

[0355] For example, up to eight SRS sequences may be mapped to SRS resource 900. For example, up to eight SRS sequences may be multiplexed in SRS resource 900.

[0356] For example, some 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 SRSs. The first SRS sequence may be determined based at least on the first antenna port. The second SRS sequence may be determined based at least on the second antenna port. The third SRS sequence may be determined based at least on the third antenna port. The fourth SRS sequence may be determined based at least on the fourth antenna port. The fifth SRS sequence may be determined based at least on the fifth antenna port. The sixth SRS sequence may be determined based at least on the sixth antenna port. The seventh SRS sequence may be determined based at least on the seventh antenna port. The eighth SRS sequence may be determined based at least on 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 be 1002. For example, the third antenna port may be 1004. For example, the fourth antenna port may be 1006. For example, the fifth antenna port may be 1001. For example, the sixth antenna port may be 1003. For example, the seventh antenna port may be 1005. For example, the eighth antenna port may be 1007.

[0358] The first SRS sequence may be determined based on at least a cyclic shift of 1_1 or a cyclic shift of 1_2. The second SRS sequence may be determined based on a cyclic shift of 2_1 or a cyclic shift of 2_2. may be determined based at least on the second cyclic shift. The fourth SRS sequence may be determined based on at least the 3_1 cyclic shift or the 3_2 cyclic shift. The fifth SRS sequence may be determined based on at least the 4_1 cyclic shift or the 4_2 cyclic shift. The fifth SRS sequence may be determined based on the 5_1 cyclic shift. The cyclic shift or the cyclic shift of the 5_2 The sixth SRS sequence may be determined based on at least a cyclic shift of 6_1 or a cyclic shift of 6_2. The seventh SRS sequence may be determined based on a cyclic shift of 7_1 or a cyclic shift of 7_2. Alternatively, the eighth SRS may be determined based at least on the seventh cyclic shift. The sequence may be determined based on at least the 8_1 th cyclic shift or the 8_2 th cyclic shift.

[0359] The first SRS sequence may be determined based at least on a 1_1 cyclic shift in the OFDM symbols included in OFDM symbol set 920. The first SRS sequence may be determined based at least on a 1_2 cyclic shift in the OFDM symbols included in OFDM symbol set 921. The n-th SRS sequence may be determined based at least on a 1_2 cyclic shift in the OFDM symbols included in OFDM symbol set 920. The n-th SRS sequence may be determined based at least on the (n_1)-th cyclic shift. may be determined based at least on the n_2-th cyclic shift in the OFDM symbols included in OFDM symbol set 921.

[0360] The values of "1" and "-1" in Figure 9 are the cyclic shift exp(j(αi*k'+α'l'')). For example, αi in FIG. 9 may be π. α' may be a cyclic shift initial value. α' may be π. l'' is an OFDM symbol set. For example, l'' may correspond to OFDM symbol set 920. For example, l'' may correspond to OFDM symbol set 921.

[0361] One problem is that although SRS may be used to measure channel quality, the SRS of a terminal device may interfere with the SRS of other terminal devices, affecting the measurement of channel quality. Therefore, we have developed a method to dynamically change the parameters for SRS and suppress the influence of interference. Either or both of stage 1 and stage 2 may be used.

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

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

[0364] The SRS sequence may be determined based at least on a cyclic shift. The cyclic shift may be αi. The cyclic shift may be a small value relative to the initial cyclic shift value. For example, the cyclic shift initial value may be determined based on n CS,i SRS The initial value of the cyclic shift may be included in the formula for determining n CS SRS The initial cyclic shift value may be determined for each second number of OFDM symbols. That is, the cyclic shift may be determined, updated, or changed for each second OFDM symbol.

[0365] For example, the cyclic shift initial value is set to the first value n for each second number of OFDM symbols. CS’ Minute increment The initial value of the cyclic shift is n CS’ , or , l''n CS’ As, n CS,i SRS For example, if the initial value of the cyclic shift at l''=0 is 0, the initial value of the cyclic shift at l''=1 is n CS’ may be For example, the initial value of the cyclic shift in l'' is mod(l''n CS’ , n CS,max SRS) In other words, the initial cyclic shift value may be determined based on the maximum number of cyclic shifts. CS’ can be 1. n CS’ is n CS,max SRS R fac / N SRS symb That is, 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 the maximum number of cyclic shifts. CS’ may be determined by the DCI format.

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

[0367] The SRS sequence is determined based on at least the cyclic shift and the initial value of the cyclic shift. The cyclic shift may be αi, and the cyclic shift The initial value may be α′. The SRS sequence may be determined for each second number of OFDM symbols. The SRS sequence is determined, updated, or changed based on the first amount of change every second number of OFDM symbols. , may be changed. The first amount of change may be determined based on both the first number of OFDM symbols and the second number of OFDM symbols.

[0368] In the means 1, the second number of OFDM symbols may be determined by a higher layer parameter. For example, the number of second OFDM symbols is the number of repetitions R fac The initial cyclic shift value may be determined based on one or both of the first number of OFDM symbols and the second number of OFDM symbols. The initial cyclic shift value may be determined based on at least one of the first number of OFDM symbols and the second number of OFDM symbols.

[0369] In the means 2, the second number of OFDM symbols may be determined by a DCI format. The initial cyclic shift 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. Then, the initial cyclic shift value may be determined based on at least the second number of OFDM symbols.

[0370] In the means 2, the second number of OFDM symbols may be determined by a higher layer parameter. For example, the number of second OFDM symbols is the number of repetitions R fac The cyclic shift initial value may be determined by the DCI format.

[0371] The terminal device 1 may include a generation unit that generates an SRS sequence. The terminal device 1 may include a transmission unit that transmits 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 a cyclic shift initial value. The cyclic shift initial value may be determined for each second OFDM symbol. The SRS resource may be configured based at least on the first number of OFDM symbols. The second number of OFDM symbols may be equal to or less than the first number of OFDM symbols.

[0372] Various aspects of the device according to one aspect of this embodiment will be described below.

[0373] (1) In order to achieve the above object, the aspects of the present invention provide the following means: That is, a first aspect of the present invention is a terminal device, comprising: a generator for generating an SRS sequence; a transmitter for transmitting an SRS resource to which the SRS sequence is mapped; and an antenna for receiving higher layer parameters. and a signal resource control layer processing unit, wherein the SRS resource is at least a first OFDM symbol. the SRS sequence is determined based at least on a cyclic shift; The cyclic shift may be determined based on at least an initial cyclic shift value, the initial cyclic shift value being determined for each second number of OFDM symbols, the second number of OFDM symbols being determined based on the higher layer parameter, and the second number of OFDM symbols being less than or equal to 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 terminal device may include a receiver that receives a PDCCH to which a DCI format is mapped, and the initial cyclic shift value may be determined by the DCI format.

[0374] (2) A second aspect of the present invention is a base station device, comprising: a receiving unit that receives an SRS resource to which an SRS sequence is mapped; and a radio resource control layer processing unit that transmits higher layer parameters, wherein the SRS sequence is generated, the SRS resource is configured with at least a first number of OFDM symbols, the SRS sequence is determined at least based on a cyclic shift, and the cyclic shift is The cyclic shift is determined based on at least 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 higher layer parameter, and the second number of OFDM symbols is less than or equal to the first number of OFDM symbols. Furthermore, 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 a maximum number of cyclic shifts for the SRS sequence. Alternatively, the base station device may determine the DCI format based on one of the DCI formats. The present invention may further include a transmitter that transmits a PDCCH that is determined by the DCI format, and the cyclic shift initial value may be determined by the DCI format.

[0375] The programs that run on the base station device 3 and terminal device 1 according to the present invention may be programs that control a CPU (Central Processing Unit) or the like (programs that make a computer function) so as to realize the functions of the above-described embodiments according to the present invention. Information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing. The data is then stored in various ROMs such as Flash ROM (Read Only Memory) or HDD (Hard Disk Drive), and is read, modified, and written by the CPU as needed.

[0376] In addition, a part of the terminal device 1 and the base station device 3 in the above-described embodiment may be realized by a computer. In that case, a program for realizing this control function is written in the computer. Alternatively, the program may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read and executed by a computer system.

[0377] The term "computer system" used here refers to a computer system built into the terminal device 1 or base station device 3, and includes hardware such as an OS and peripheral devices. Also, the term "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into the computer system.

[0378] Furthermore, the term "computer-readable recording medium" may include a medium that dynamically stores a program for a short period of time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, or a medium that stores a program for a fixed period of time, such as volatile memory within a computer system that serves as a server or client in such a case. The program may also be one that realizes part of the above-mentioned functions, or one that can realize the above-mentioned functions in combination with a program already stored in the computer system.

[0379] Furthermore, the base station device 3 in the above-described embodiment can also be realized as a collection (device group) consisting of multiple devices. Each of the devices constituting the device group may have some or all of the functions or functional blocks of the base station device 3 according to the above-described embodiment. It is sufficient for the device group to have all of the functions or functional blocks of the base station device 3. Furthermore, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as a collection.

[0380] Furthermore, the base station device 3 in the above-described embodiments may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or an NG-RAN (NextGen RAN, NR RAN). Furthermore, the base station device 3 in the above-described embodiments may have some or all of the functions of an upper node for an eNodeB and / or a gNB.

[0381] Furthermore, some or all of the terminal device 1 and base station device 3 in the above-described embodiments may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually integrated into a chip, or part or all of them may be integrated into a chip. The integrated circuit method is not limited to LSI, but may be a dedicated circuit, Alternatively, it may be realized by a general-purpose processor. In addition, with the advancement of semiconductor technology, it is expected that LSI will replace the general-purpose processor. When integrated circuit technology emerges, it is also possible to use integrated circuits based on that technology.

[0382] Furthermore, in the above-described embodiment, a terminal device is described as an example of a communication device, but the present invention is not limited to this and can also be applied to terminal devices or communication devices such as stationary or non-movable electronic devices installed indoors or outdoors, for example, AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.

[0383] Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment and includes design modifications within the scope of the invention. Furthermore, the present invention is susceptible to various modifications within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, configurations in which elements described in the above embodiments are substituted with elements that achieve the same effect are also included. [Explanation of symbols]

[0384] 1(1A, 1B, 1C) Terminal equipment 3 Base station equipment 10, 30 Radio transmitter / receiver 10a, 30a Radio transmitter 10b, 30b Wireless receiver 11, 31 Antenna section 12, 32 RF section 13, 33 Baseband section 14, 34 Upper layer processing unit 15, 35 Medium access control layer processing unit 16, 36 Radio resource control layer processing unit 91, 92, 93, 94 Search area set 300 Component Carriers 301 Primary Cell 302, 303 Secondary Cell 700 Set of resource elements for PSS 710, 711, 712, 713 Set of resource elements for PBCH and DMRS for PBCH 720 Set of Resource Elements for SSS 3000 points 3001, 3002 Resource Grid 3003, 3004 BWP 3011, 3012, 3013, 3014 offset 3100, 3200 common resource block set 900 SRS resources 910, 911, 912, 913 OFDM symbols 920, 921 OFDM symbol sets

Claims

1. a generator for generating an SRS sequence; a transmitter for transmitting an SRS resource to which the SRS sequence is mapped; a radio resource control layer processing unit for receiving higher layer parameters; the SRS resource comprises at least a first number of OFDM symbols; the SRS sequence is determined based at least on a cyclic shift; The cyclic shift is determined based on at least a cyclic shift initial value; the cyclic shift initial value is determined for each second number of OFDM symbols; the second number of OFDM symbols is determined based on the higher layer parameter; The second number of OFDM symbols is less than or equal to the first number of OFDM symbols. Terminal device.

2. 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. It is determined based on The terminal device according to claim 1 .

3. The terminal device includes a receiving unit that receives a PDCCH to which a DCI format is mapped, The cyclic shift initial value is determined by the DCI format. The terminal device according to claim 1 .

4. a receiving unit for receiving an SRS resource to which the SRS sequence is mapped; a radio resource control layer processing unit that transmits higher layer parameters; The SRS sequence is generated; the SRS resource comprises at least a first number of OFDM symbols; the SRS sequence is determined based at least on a cyclic shift; The cyclic shift is determined based on at least a cyclic shift initial value; the cyclic shift initial value is determined for each second number of OFDM symbols; the second number of OFDM symbols is determined based on the higher layer parameter; The second number of OFDM symbols is less than or equal to the first number of OFDM symbols. Base station equipment.

5. 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. It is determined based on The base station device according to claim 4.

6. the base station apparatus includes a transmitter that transmits a PDCCH to which a DCI format is mapped, The cyclic shift initial value is determined by the DCI format. The base station device according to claim 4.

7. A communication method used in a terminal device, generating an SRS sequence; transmitting an SRS resource to which the SRS sequence is mapped; receiving higher layer parameters; the SRS resource comprises at least a first number of OFDM symbols; the SRS sequence is determined based at least on a cyclic shift; The cyclic shift is determined based on at least a cyclic shift initial value; the cyclic shift initial value is determined for each second number of OFDM symbols; the second number of OFDM symbols is determined based on the higher layer parameter; The second number of OFDM symbols is less than or equal to the first number of OFDM symbols. Communication method.

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