Terminal device and base station device

Abstract

To provide a terminal device, a base station device, and a communication method for efficiently performing communication.SOLUTION: In a wireless communication system, a terminal device includes a transmitting unit that transmits an SRS resource to which an n-th SRS sequence is mapped. The n-th SRS sequence is generated, and the n-th SRS sequence is determined based at least on an n-th cyclic shift. The n-th cyclic shift is given for an n-th antenna port, and the n-th cyclic shift is determined based at least on a maximum number of cyclic shifts for the SRS resource. Where n is an integer from 1 to 4, and when the maximum number of cyclic shifts is 6, a first cyclic shift, a second cyclic shift, a third cyclic shift, and a fourth cyclic shift are the same.SELECTED DRAWING: Figure 9

Description

[Technical field]

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

[0002] The radio access method and radio network for cellular mobile communications (hereinafter referred to as "Long Term Evolution (LTE)" or "EUTRA: Evolved Universal Terrestrial Radio Access") is being developed by the Third Generation Partnership Project (3GPP: 3 rd The LTE standard is being considered in the LTE Generation Partnership Project. In LTE, a base station device is also called eNodeB (evolved NodeB), and a terminal device is also called UE (User Equipment). LTE is a cellular communication system in which areas covered by base station devices are arranged in multiple cell shapes. 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, a standard for next-generation mobile communication systems formulated by the International Telecommunication Union (ITU) (Non-Patent Document 1). NR is required to meet the requirements for 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 considering 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: an SRS sequence to which an n-th SRS sequence is mapped; a transmitter for transmitting a source, the nth SRS sequence being generated, the nth SRS sequence being determined based at least on an nth cyclic shift, the nth cyclic shift being provided for an nth antenna port, the nth cyclic shift being determined based at least on a maximum number of cyclic shifts for the SRS resource, the n being an integer from 1 to 4, and the first cyclic shift, the second cyclic shift, the third cyclic shift, and the fourth cyclic shift being the same when the maximum number of cyclic shifts is 6, the first cyclic shift and the second cyclic shift being the same when the maximum number of cyclic shifts is 8, the second cyclic shift and the third cyclic shift being different when the maximum number of cyclic shifts is 8, and the third cyclic shift and the fourth cyclic shift being the same when the maximum number of cyclic shifts is 8.

[0008] (2) A second aspect of the present invention is a base station device, comprising: a receiving unit for receiving an SRS resource to which an n-th SRS sequence is mapped, the n-th SRS sequence is generated, and the n-th SRS sequence is A sequence is determined based at least on an n-th cyclic shift, the n-th cyclic shift being provided for an n-th antenna port, the n-th cyclic shift being determined based at least on a maximum number of cyclic shifts for the SRS resource, The n is an integer from 1 to 4, and when the maximum number of cyclic shifts is 6, The first cyclic shift, the second cyclic shift, and the third cyclic shift. The fourth cyclic shift is the same as the first cyclic shift. If the maximum number of shifts is 8, the first cyclic shift and the second cyclic shift The second cyclic shift and the third cyclic shift are different when the maximum number of cyclic shifts is 8. If the maximum number of shifts is 8, the third cyclic shift and the fourth cyclic shift The shift is the same as the shift.

[0009] (3) A third aspect of the present invention is a communication method for use in a terminal device, comprising the step of transmitting an SRS resource to which an n-th SRS sequence is mapped, the n-th SRS sequence is determined based at least on the n-th cyclic shift; The nth cyclic shift is given for the nth antenna port, and the nth sub-port is The cyclic shift must be at least as large as the maximum number of cyclic shifts for the SRS resource. and n is an integer from 1 to 4, and the maximum number of cyclic shifts is 6, the first cyclic shift, the second cyclic shift, and , the third cyclic shift and the fourth cyclic shift are the same. Also, when the maximum number of cyclic shifts is 8, the first cyclic shift and the second cyclic shift are the same, when the maximum number of cyclic shifts is 8, the second cyclic shift and the third cyclic shift are different, and when the maximum number of cyclic shifts is 8, the third cyclic shift and the fourth cyclic shift are the same.

[0010] (4) A fourth aspect of the present invention is a communication method for use in a base station device, comprising: receiving an SRS resource to which a n-th SRS sequence is mapped, the n-th SRS sequence being generated, the n-th SRS sequence being determined based at least on an n-th cyclic shift. , the nth cyclic shift is given for the nth antenna port, The cyclic shift is set to a value less than the maximum number of cyclic shifts for the SRS resource. and the first cyclic shift and the second cyclic shift are determined based on n, n being an integer from 1 to 4, and the maximum number of cyclic shifts is 6. The third cyclic shift and the fourth cyclic shift are the same. Also, when the maximum number of cyclic shifts is 8, the first cyclic shift and the second cyclic shift are the same, when the maximum number of cyclic shifts is 8, the second cyclic shift and the third cyclic shift are different, and when the maximum number of cyclic shifts is 8, the third cyclic shift and the fourth cyclic shift are the same. Effect 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 description of the drawings]

[0012] [Figure 1] 1 is a conceptual diagram of a wireless communication system according to an embodiment of the present invention. [Diagram 2] 1 is an example showing a relationship between a subcarrier spacing setting μ, the number of OFDM symbols per slot Nslot symb, and a cyclic prefix (CP) setting according to an aspect of the present embodiment. [Diagram 3] FIG. 2 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. [Diagram 5] 2 is a schematic block diagram illustrating a configuration example of a base station device 3 according to an 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 embodiment of the present invention. [Figure 8] A diagram showing an example of a monitoring opportunity for a search area set according to one aspect of this embodiment. [Figure 9] FIG. 2 is a diagram illustrating an example of SRS (SRS resource) transmission according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 is 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 the wireless communication system according to the embodiment, at least OFDM (Orthogonal Frequency Division Multiplex) 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 Multiplex) is used. In the uplink, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform - spread - Orthogonal Frequency Division Multiplex) is used. DFT-s-OFDM 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, that is, a certain OFDM symbol may be configured to include the certain OFDM symbol and a CP added to the certain OFDM symbol.

[0017] Fig. 1 is a conceptual diagram of a wireless communication system according to an 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 are also referred to as terminal device 1 (UE#1: User Equipment#1).

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

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

[0020] A serving cell may be configured to include one downlink component carrier (downlink carrier) and / or one uplink component carrier (uplink carrier). A serving cell may be configured to include two or more downlink component carriers and / or 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. Also, 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 an 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 base grid is composed of common resource blocks N start,μ grid,x It starts from. Also, Resource Block N start,μ grid,x is also referred to as the reference point of the resource grid.

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

[0024] The subscript x, which is added 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 parameters provided by the RRC layer (e.g., N start,μ grid,x is the bandwidth setting indicated by parameters provided by the RRC layer (e.g., parameter OffsetToCarrier). The offset and band settings are the configuration of the SCS-specific carrier. This is the setting used for.

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

[0027] FIG. 2 shows a subcarrier interval setting μ and the number of OFDM symbols per slot N according to one embodiment of the present invention. slot symb 2A is an example showing the relationship between the subcarrier interval setting μ of 2 and the CP setting of normal CP (cyclic prefix). l cyclic prefix), N slot symb =14, N frame,μ slot =40, N subframe, μ slot In FIG. 2B, for example, the subcarrier spacing setting μ is 2. If the CP setting is an extended cyclic prefix, N 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 = 480kHz. f =409 6. The constant κ is κ=Δf max N f / (Δf ref N f,ref ) = 64. Δf ref is 1 It is 5kHz. 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 of length T f The radio frames (system frames, frames) may be organized into T f =(Δf max N f / 100)·T s = 10 ms. A radio frame is made up 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 =Nslot symb N subframe,μ slot It is.

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

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

[0032] For a given subcarrier spacing setting μ, the number and index of slots contained in a subframe may be given. For example, slot index n μ s ranges from 0 to N in the subframe. subframe,μ slot The subcharacters may be given in ascending order in the range -1 to +1. For the purpose of 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 through increasing order may be given.

[0033] 3 is a diagram showing an example of a method for configuring a resource grid according to an aspect of the present embodiment. The horizontal axis of FIG. 3 indicates the frequency domain. In FIG. 3, the subcarrier spacing μ 1 A configuration example of a resource grid of the above and a subcarrier spacing μ2 In this way, one or more subcarrier spacings may be set for a certain component carrier. 1 =μ 2 -1, but various aspects of the present embodiment 1 =μ 2 Not limited to the condition -1.

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

[0035] The point 3000 is an identifier for identifying a certain subcarrier. The point 3000 is also called point A. The common resource block (CRB) set 3100 is a set of subcarrier spacings μ 1 is a set of common resource blocks for

[0036] In the common resource block set 3100, the common resource block including the point 3000 (the black block in the common resource block set 3100 in FIG. 3) is It 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 an 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 determined by the subcarrier spacing setting μ 1 The resource grid 3001 is represented by the number of common resource blocks for 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 )

[0039] The common resource block set 3200 is a set of subcarrier spacing μ 2 is a set of common resource blocks for

[0040] In the common resource block set 3200, the common resource block including the point 3000 (a 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 an 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 determined by the subcarrier spacing μ 2 The resource grid 3002 is represented by the number of common resource blocks relative to the 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 )

[0043] 4 is a diagram showing an example of the configuration of a resource grid 3001 according to one aspect of this embodiment. In the resource grid of FIG. 4, the horizontal axis represents the OFDM symbol index l sym and the vertical axis is the subcarrier index k sc The resource grid 3001 is size,μgrid1,x N RB sc It 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] A resource block (RB) is N RB sc Contains consecutive subcarriers Resource blocks are classified 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 block for a certain subcarrier spacing setting μ is In the lock set, indexing is done in ascending order in the frequency domain starting from 0. For a given subcarrier spacing setting μ, the common resource block with index 0 contains (or collides with, or coincides with) point 3000. For a given subcarrier spacing setting μ, the index n μ CRB is n μ CRB =ceil(ksc / N RB sc ) relationship is satisfied. Here, k sc A subcarrier with a center frequency of 0 is a subcarrier having the same center frequency as the subcarrier corresponding to point 3000.

[0047] The physical resource block for a certain subcarrier spacing setting μ is given as follows for a certain 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 certain subcarrier spacing setting μ μ PRB is n μ CRB =n μ PRB +N start,μ BWP,i Here, 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 set at the reference point N of the BWP. start,μ BWP,i Starting with N size,μ BWP,i Common lithography The BWP configured for the downlink carrier is also called downlink BWP. The BWP configured for the uplink component carrier is also called uplink BWP.

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

[0050] When the large scale properties of a channel through which a symbol is transmitted at one antenna port can be estimated from the channel through which a symbol is 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 spatial Rx parameters. The first antenna port and the second antenna port being QCL with respect to beam parameters may mean that a receiving beam assumed by the receiving side for the first antenna port is the same (or corresponds) as a receiving beam assumed by the receiving side 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 aggregating multiple serving In addition, the carrier aggregation may be a method of performing communication using a plurality of aggregated component carriers. Carrier aggregation may be communication using multiple aggregated downlink component carriers. Also, carrier aggregation may be communication using multiple aggregated uplink component carriers.

[0052] Fig. 5 is a schematic block diagram showing a configuration example of a base station device 3 according to one aspect of the present embodiment. As shown in Fig. 5, the base station device 3 includes at least a radio transmission / reception unit (physical layer processing unit) 30 and / or a part or all of a higher layer processing unit 34. The radio transmission / reception unit 30 includes at least an antenna unit 31, an RF (Radio Frequency) unit 32, and a part or all of a baseband unit 33. The higher layer processing unit 34 includes at least a medium access control layer processing unit 35 and a 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 a part or all of a wireless receiver 30b. Here, the device configurations of the baseband unit included in the wireless transmitter 30a and the baseband unit included in the wireless receiver 30b may be the same or different. Furthermore, the device configurations of the RF unit included in the wireless transmitter 30a and the RF unit included in the wireless receiver 30b may be the same or different. Furthermore, the device configurations of the antenna unit included in the wireless transmitter 30a and the antenna unit included in the wireless receiver 30b may be the same or different.

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

[0055] For example, the wireless receiving unit 30b may receive a PRACH. For example, the wireless receiving unit 30b may receive and demodulate a PUCCH. The wireless receiving unit 30b may receive and demodulate a PUSCH. For example, the wireless receiving unit 30b may receive a PUCCH DMRS. For example, the wireless receiving unit 30b may receive a PUSCH DMRS. For example, the wireless receiving unit 30b may receive a UL PTRS. For example, the wireless 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 of a Medium Access Control (MAC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and an RRC layer.

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

[0058] The radio resource control layer processing unit 36 ​​included in the upper layer processing unit 34 performs processing for the RRC layer. The wired resource control 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 unit 30 (or the radio transmitter unit 30a) performs processes 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 corresponding to the signal and transmitted to the terminal device 1.

[0060] The wireless transceiver unit 30 (or the wireless receiver 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 receives the analog signal from the RF unit 32. The baseband unit 33 converts the converted digital signal into a digital signal. 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 an OFDM symbol, adds a CP to the generated OFDM symbol, generates a baseband digital signal, and converts the baseband digital signal into an analog signal. The baseband unit 33 outputs the converted analog signal to the RF unit 32.

[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 of controlling 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, a Primary SCG cell (PSCell), and a Secondary Cell (SCell).

[0067] The PCell is a serving cell included in a Master Cell Group (MCG). The PCell is a 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 a Secondary Cell Group (SCG). , which is the serving cell to which random access is performed by terminal device 1.

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

[0070] The term "serving cell group" (cell group) refers to at least the MCG and the SCG. The serving cell group may include one or more serving cells (or component carriers). The one or more serving cells (or component carriers) included in the 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. This is also fine.

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

[0073] The PDSCH, the PDCCH, and the CSI-RS may be received in an active downlink BWP. The terminal device 1 may attempt to receive the PDSCH, the PDCCH, and the CSI-RS in an active downlink BWP. The PUCCH and the 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 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 active 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 do not need to attempt transmission. 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. Inactive 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 the in-band of the serving cell. This is a 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 be controlled based on higher layer parameters.

[0077] Of one or more downlink BWPs configured for a serving cell, two or more The 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] Of one or more uplink BWPs configured for a serving cell, two or more An uplink BWP does not have to be set as an 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 a configuration example 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 a radio transmission / reception unit (physical layer processing unit) 10 and one or all of an upper layer processing unit 14. The radio transmission / reception unit 10 includes at least an antenna unit 11, an RF unit 12, and some 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 some 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 whole 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 transmission unit 10a and the RF unit 12 included in the wireless reception 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 be different.

[0081] For example, the radio transmission unit 10a may generate and transmit a baseband signal of a PRACH. For example, the radio transmission unit 10a may generate and transmit a baseband signal of a PUCCH. For example, the radio transmission unit 10a may generate and transmit a baseband signal of a PUSCH. For example, the radio transmission unit 10a may generate and transmit a baseband signal of a PUCCH DMRS. For example, the radio transmission unit 10a may generate and transmit a baseband signal of a PUSCH DMRS. For example, the radio transmission unit 10a may generate and transmit a baseband signal of a UL PTRS. For example, the radio transmission unit 10a may generate and transmit a baseband signal of a UL PTRS. 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 receiving unit 10b may receive and demodulate a PDSCH. For example, the wireless receiving unit 10b may receive and demodulate a PDCCH. For example, the wireless receiving unit 10b may receive and demodulate a PBCH. For example, the wireless receiving unit 10b may receive a synchronization signal. For example, the wireless receiving unit 10b may receive a PDSCH DMRS. For example, the wireless receiving unit 10b may receive a PDCCH DMRS. For example, the wireless receiving unit 10b may receive a CSI-RS. For example, the wireless receiving unit 10b may receive a 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 of the MAC layer, the packet data integration 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 of the RRC layer. The wired resource control 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 message 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 processes such as modulation and encoding. The radio transceiver 10 (or the radio transmitter 10a) modulates, encodes, and transmits uplink data. The radio transmission / reception unit 10 (or the radio transmission unit 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. Alternatively, the signal may be arranged in a certain BWP (active uplink BWP) and transmitted to the base station device 3.

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

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

[0089] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 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 generates a baseband digital signal and converts the baseband digital signal into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

[0091] The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, 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 of controlling 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 the downlink physical channel, the downlink physical signal, the uplink physical channel, and the uplink physical channel. The physical channel is a general term for the downlink physical channel and the uplink physical channel. The physical signal is a general term for the downlink physical signal and the 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] The 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 channel state information (CSI), schedule Scheduling Request (SR), HARQ-ACK (Hybrid Automatic Repeat Request) The ACKnowledgement (request) information is included in the response.

[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 decoding of the transport block has been successfully completed. The NACK may indicate that the decoding of the transport block has not been successfully completed. 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 delivered via an UpLink-Shared CHannel (UL-SCH) in the transport layer.

[0100] In some cases, the HARQ-ACK for a transport block is referred to as the HARQ-ACK for a PDSCH. In this case, the HARQ-ACK for the PDSCH is sent via the transport 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 UL-SCH for initial transmission by the terminal device 1. The scheduling request bit may be used to indicate either a positive SR or a negative SR. The scheduling request bit indicating a positive SR is also referred to as "a positive SR is conveyed." A positive SR indicates that the terminal device 1 is to transmit a UL-SCH for initial transmission. A positive SR may indicate that UL-SCH resources 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 conveyed when a scheduling request is indicated by a higher layer. The scheduling request bit indicating a negative SR is also referred to as "a negative SR is transmitted". A negative SR may indicate that no UL-SCH resources are requested by the terminal device 1 for initial transmission. 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 index related to the quality of a propagation path (e.g., propagation strength) or the quality of a physical channel, and the PMI is an index related to a precoder. The RI is an index 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 a physical signal (e.g., CSI-RS) used for channel measurement. The value of the channel state information is Based on the reception state assumed by at least the physical signal used for the purpose, the terminal device The channel measurements may include interference measurements.

[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 to a certain information format.

[0106] The PUSCH carries transport blocks and / or uplink control information. The transport block may be placed in 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. Alternatively, the PUSCH may include either or both of the uplink control information and the uplink control information. The base station device 3 may receive a PUSCH in which one or both of a transport block and uplink control information are mapped.

[0107] The PRACH may be transmitted to convey 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. Also, x u x u =exp(-jπui(i+1) / L RA ) by may be defined as follows: j is the imaginary unit, and π is the ratio of the circumference of a circle to its circumference. 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 may not be used to transmit information generated in a higher layer. In addition, 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] A set of antenna ports of a DMRS for a PUSCH (a DMRS related to a PUSCH, a DMRS included in a PUSCH, a DMRS corresponding to a PUSCH) may be given based on a set of antenna ports for the PUSCH. For example, the set of antenna ports of a DMRS for a PUSCH may be the same as the set of antenna ports for the PUSCH.

[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 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 element of the DMRS for the PUCCH One or both of the mappings may be provided by one PUCCH format. The PUCCH and the DMRS for the PUCCH may be collectively referred to as a PUCCH. Transmitting a PUCCH may be 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 the present 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 arranged in a Broadcast Control CHannel (BCCH), which is a logical channel of the MAC layer. The BCCH is arranged in a BCH, which is a channel of the transport layer. The BCH may be arranged (mapped) in the PBCH. The terminal device 1 may receive the PBCH in which the MIB and one or both of the physical layer control information are arranged. The base station device 3 may transmit the PBCH in which the MIB and one or both of the physical layer control information are arranged.

[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 at least to identify 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, the half radio frame may be configured to include five subframes. Alternatively, the half radio frame may be configured to include the first five subframes of the ten subframes included in the radio frame. Alternatively, the half radio frame may be configured to include the last five subframes of the ten subframes included in the radio frame.

[0122] The SS / PBCH block index bits are used to indicate an SS / PBCH block index. The SS / PBCH block index bits include 3 bits. The SS / PBCH block index bits may be composed of 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 transmit Downlink Control Information (DCI). The DCI 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 arranged 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 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 in a cell. DCI format 0_0 is used for 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 that includes the DCI format specific field. In other words, the DCI format specification field may be included in each of the uplink DCI format and the downlink DCI format. The DCI format specific field contained in 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 the DCI format 0_0 is allocated belongs uses the DCI format 0_0. The cell is the same as the serving cell of the uplink component carrier on which the PDCCH including the The terminal device 1 may detect the DCI format 0_0 in a downlink component carrier of a serving cell, and may transmit a PUSCH scheduled in accordance with the DCI format 0_0 to an uplink component carrier of the serving cell. It may be recognized that the carrier may be placed in the carrier.

[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 an 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 in a cell. DCI format 0_1 ​​is used for some 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 coding 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 in an active uplink BWP. The terminal device 1 may recognize an uplink BWP in which a PUSCH is arranged based on detecting the DCI format 0_1 ​​used for scheduling a 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 the DCI format D0_1, which is the DCI format 0_1 ​​used for scheduling the PUSCH and does not include the BWP field.

[0143] DCI format 0_1 ​​includes the 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, a 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 transmits 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 the DCI format 0_1 ​​includes a carrier indicator field, The rear indicator field is the uplink component carrier in which the PUSCH is placed. The 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 located 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 arranged in the certain serving cell group may be the same as the uplink component carrier. The carrier indicator field included in the DCI format 0_1 ​​used for The number of bits may be 1 bit 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 arranged in the certain serving cell group may be set to 1 bit or more (for example, 3 bits). Carrier indicator field included in DCI format 0_1 ​​used for The number of bits may be 0 bits (or may be 0 bits arranged in the serving cell group). (The carrier indicator field may not be included in DCI format 0_1 ​​used for scheduling the PUSCH to be transmitted).

[0146] DCI format 1_0 is used at least for scheduling of PDSCHs allocated to a certain cell. DCI format 1_0 includes 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 in 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

[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 the 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 the DCI format 1_0 in a certain downlink component carrier, the terminal device 1 may detect the PDSCH scheduled by the DCI format 1_0 in the downlink component carrier. It may be recognized that the carrier may be placed in the carrier.

[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 detects the DCI format 1_0 used for scheduling the PDSCH and determines whether or not to switch the active downlink BWP. It may be possible to recognize that the PDSCH is received without performing the above.

[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 a slot including the last OFDM symbol of the PDSCH to a slot including 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 a slot including the last OFDM symbol of the PDSCH to a slot including the first OFDM symbol of the PUCCH may be specified by a higher layer parameter.

[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 in 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 the PDSCH is to be received 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 the 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 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 is 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 arranged is A PDCCH including DCI format 1_1 used for scheduling the PDSCH is arranged. When the number of downlink component carriers configured in the terminal device 1 in a certain serving cell group is two or more (when downlink carrier aggregation is operated in a certain serving cell group), the scheduling of the PDSCH arranged in the certain serving cell group may be the same as the downlink component carrier configured in the certain serving cell group. The carrier indicator field included in the DCI format 1_1 used for The number of bits may be 1 bit 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 may be Carrier indicator field included in DCI format 1_1 used for 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. The transport block may be arranged in the PDSCH. A transport block corresponding to the DL-SCH may be arranged in 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 the present 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 primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0169] FIG. 7 is a diagram showing an example of the configuration of an SS / PBCH block according to one embodiment of the present invention. 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 a PSS. Block 720 shows a set of resource elements for SSS. The blocks (blocks 710, 711, 712, and 713) indicate a set of resource elements for the PBCH and a DMRS for the PBCH (DMRS associated with the PBCH, DMRS included in the PBCH, and DMRS corresponding to the PBCH).

[0170] As shown in FIG. 7, the SS / PBCH block includes a PSS, an SSS, and a 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 placed in subcarriers 57 to 183 in the third OFDM symbol. The PBCH is allocated to the 1st subcarrier of the 2nd OFDM symbol. The 1st to 56th subcarriers of the 1st OFDM symbol may be set to zero. The 184th to 240th subcarriers of the 1st OFDM symbol may be set to zero. The 49th to 56th subcarriers of the 3rd OFDM symbol may be set to zero. The 184th to 192nd subcarriers of the 3rd OFDM symbol may be set to zero. The PBCH is allocated to the 1st to 240th subcarriers of the 2nd OFDM symbol, and to subcarriers in which the DMRS for the PBCH is not allocated. The PBCH is allocated to the 1st to 48th subcarriers of the 3rd OFDM symbol, and to subcarriers in which the DMRS for the PBCH is not allocated. The PBCH is allocated to the 193rd to 240th subcarriers of the 3rd OFDM symbol, and to subcarriers in which the DMRS for the PBCH is not allocated. The PBCH is allocated to the 1st to 240th subcarriers of the 4th OFDM symbol, which are subcarriers in 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 a 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 is included.

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

[0174] A set of antenna ports of DMRS for PDSCH (DMRS related to PDSCH, DMRS included in PDSCH, DMRS corresponding to PDSCH) may be given based on the set of antenna ports for the PDSCH, i.e., the set of antenna ports of DMRS for 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 a PDSCH. Transmitting a PDSCH may be transmitting a PDSCH and a 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 symbol of the DMRS for the PDSCH are transmitted. In the case where a set of resource elements on which a symbol of a PDSCH is transmitted is included in the same precoding resource group (PRG), the PDSCH on which a symbol of the PDSCH is transmitted in a certain antenna port 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. That is, 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 symbols of a DMRS for the PDCCH are transmitted If the same precoder is applied (is assumed to be applied, is assumed to be applied) in a set of elements, the symbols of the PDCCH at a certain antenna port are transmitted. The PDCCH to be transmitted 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 a physical layer channel and a MAC layer channel (also called a logical channel).

[0180] The BCH of the transport layer is mapped to the PBCH of the physical layer. The transport blocks on the BCH are delivered to the PBCH of the physical layer. The UL-SCH of the transport layer is mapped to the PUSCH of the physical layer, i.e., the transport block carried by the UL-SCH of the transport layer is delivered to the PUSCH of the physical layer. Also, the DL-SCH of the transport layer is mapped to the PDSCH of the physical layer, i.e., the transport block carried by the DL-SCH of the transport layer is delivered to the PDSCH of the physical layer.

[0181] For each serving cell, one UL-SCH and one DL-SCH may be provided. The BCH may be provided for the PCell. The BCH does not 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), the CCCH (Common Control CHannel), and the 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] The upper layer parameters common to a plurality of 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, the parameters specific to a serving cell are parameters common to terminal devices (e.g., terminal devices 1-A, B, C) in which the serving cell is set. It may also be a data.

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

[0186] Among the upper layer parameters, the upper layer parameters different from the common upper layer parameters are also called dedicated upper layer parameters. Here, the dedicated upper layer parameters are In other words, the dedicated RRC parameters are higher 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 including MIB information is delivered to the BCH of the transport layer. A transport block including system information other than MIB is delivered to the DL-SCH of the transport layer. A CCCH is mapped to the DL-SCH or UL-SCH. That is, a transport block mapped to a CCCH is delivered to the DL-SCH or UL-SCH. A DCCH is mapped to the DL-SCH or UL-SCH. That is, a transport block mapped to a 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. The RRC message including a message corresponding to a DCCH is also referred to as an individual RRC message.

[0189] The upper layer parameters are RRC parameters or parameters included in MAC CE (Medium Access Control Control Element). In other words, the upper layer parameters are a collective term for MIB, system information, messages corresponding to CCCH, messages corresponding to DCCH, and parameters included in MAC CE. The parameters included in MAC CE are 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 terms of 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 terms of the time domain and the frequency domain and detect a physical cell ID.

[0192] The sequence of the PSS is based at least on the physical cell ID. The sequence of the SSS is based at least on the physical cell ID.

[0193] The SS / PBCH block candidates indicate resources on which transmission of the SS / PBCH block is permitted (possible, 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. The SS burst set is also called the Discovery Reference Signal transmission window (DRS transmission window), or the Discovery Reference Signal transmission window (DRS 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 transmits at least one of the SS / PBCH blocks of the one or more indexes. Alternatively, the SS / PBCH block may be detected and an attempt may be made to decode the PBCH contained 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 in which the PRACH is transmitted by the terminal device 1. The terminal device 1 transmit a PRACH 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 RA-RNTI (Random Access - Radio Network Temporary Identifier). The terminal device 1 attempts to detect a PDCCH including the 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 called a random access response.

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

[0201] The PUSCH scheduled based on the random access response grant is The message 3 PUSCH contains a contention resolution identifier (MAC CE). The contention resolution identifier (MAC CE) is used to identify the contention. Contains the 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 resources specified based on the control resource set and the search space set (monitors the PDCCH, detects the PDCCH, monitor).

[0206] A control resource set is a set of resources consisting of a certain number of resource blocks and a certain number of OFDM symbols. In the frequency domain, the control resource set may consist of continuous 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. 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, detection of the PDCCH may be attempted in the control resource set. Alternatively, the control resource set may be used to detect PDCCH candidates. , 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 a part or all of a Type 0 PDCCH common search space set, a Type 0a PDCCH common search space set, a Type 1 PDCCH common search space set, a Type 2 PDCCH common search space set, a Type 3 PDCCH common search space set, and / or a UE-specific 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 dedicated PDCCH search space set.

[0212] A search space set is associated with (contains, 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 search area set is defined as a monitoring occasion for the certain search area set. The monitoring opportunity for a search space set may correspond to an OFDM symbol in which a first OFDM symbol of an associated control resource set is located. The monitoring opportunity for a search space set may correspond to a resource of a control resource set starting from a first OFDM symbol of the control resource set associated with the search space set. The monitoring opportunity for the search space set may be determined based on a monitoring interval of a PDCCH, a monitoring pattern of a PDCCH in a slot, The PDCCH monitoring offset is based at least in part on the PDCCH monitoring offset.

[0215] 8 is a diagram showing an example of a monitoring opportunity of the search area set according to one aspect of the present embodiment. In FIG. 8, a search area set 91 and a search area set 92 are set in a primary cell 301, a search area set 93 is set in a secondary cell 302, and a search area set 94 is set in a 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 The offset is set to 0 slot, and the monitoring pattern of the search area set 91 is [1,0 ,0,0,0,0,0,1,0,0,0,0,0,0,0]. The monitoring opportunities for search region set 91 correspond to the first OFDM symbol (OFDM symbol #0) and the eighth OFDM symbol (OFDM symbol #7) in each of the slots.

[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 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0]. The monitoring opportunity for search region 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 ,0,0,0,0,0,1,0,0,0,0,0,0,0]. The monitoring opportunity for search region 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 [1,0 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0]. The monitoring opportunity for search region 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 Interference 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] The Type 2 PDCCH common search space set is the P-RNTI (Paging-Radio Network Temporary Identifier). This may be used for DCI formats with CRC sequences scrambled by a quantifier.

[0225] A 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 resource allocation of the PDSCH. The detected downlink DCI format is also called a downlink assignment. The terminal device 1 attempts to receive the PDSCH. Based on the PUCCH resource indicated based on the 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 the 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 set 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 set in the case of the set 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 the uplink in time division duplex. The UL symbol may be an OFDM symbol configured or indicated for the 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 by

[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 symbol may be an OFDM symbol that is not set or indicated as a UL symbol or DL ​​symbol among the OFDM symbols in a certain period. The certain period may be a period given by the higher layer parameter dl-UL-TransmissionPeriodicity. The flexible symbols may be for PDSCH, PDCCH, PUSCH, PUCCH, or PRACH. It may be an OFDM symbol that is 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 higher layer parameter. PUSCH-ConfigCommon may be a common higher layer parameter. PUSCH-Config is configured per BWP for PUSCH transmission. PUSCH-Config may include a plurality of higher layer parameters related to PUSCH transmission. PUSCH-Config may be a UE-specific setting. For example, PUSCH-Config for the terminal device 1A, the terminal device 1B, and the terminal device 1C in one cell, or a plurality of higher layer parameters included in the PUSCH-Config may be different. PUSCH-ConfigCommon may be set for each BWP for PUSCH transmission. PUSCH-ConfigCommon may include a plurality of higher layer parameters related to PUSCH transmission. PUSCH-ConfigCommon may be a cell-specific setting. For example, PUSCH-ConfigCommon for the terminal device 1A, the terminal device 1B, and the terminal device 1C in one cell may be common. For example, PUSCH-ConfigCommon may be given by system information.

[0236] Repeated transmission may be applied to the PUSCH. For example, repeated transmission may be applied to the PUSCH scheduled by the DCI. Repeated transmission may be applied to the PUSCH scheduled by the grant. The PUSCH repetition type is PUSCH repetition type A and PUSCH repetition type B. The PUSCH repetition type is set 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 repeated transmission may be configured by higher layer parameters. For example, the upper layer parameter numberOfRepetitions is the number of repetitions for PUSCH repetition transmission. The PUSCH repetition number corresponding to the PUSCH repetition type A may be a parameter including the number of repetitions. In the repeat transmission, the number of repetitions for the PUSCH repeat transmission may be determined by the value of the higher layer parameter numberOfRepetitions. In the PUSCH repetition type A, the PUSCH whose transmission is indicated by the DCI format with CRC scrambled by C-RNTI and either MCS-C-RNTI or CS-RNTI may have the number of repetitions equal to numberOfRepetitions if there is numberOfRepetitions in the resource allocation table. When one PUSCH-Time Domain Resource Allocation includes one or more PUSCH-Allocations, the higher layer parameter numberOfRepetitions may be set for each PUSCH-Allocation. Also, the PUSCH-Time Domain Resource Allocation 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 indicate the number of PUSCH repetitions corresponding to the 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 the PUSCH, the transmission of which is indicated by the DCI format with C-RNTI and CRC scrambled by 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 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 the PUSCH repetition transmission corresponding to PUSCH repetition type B, nominal repetition is used. The repetition may be based on actual repetition.

[0241] The frequency hopping scheme may be set by a higher layer parameter. The higher layer parameters frequencyHopping, frequencyHoppingDCI-0-1, and frequencyHoppingDCI-0-2 may be parameters that provide a frequency hopping scheme for PUSCH. For example, a frequency hopping scheme corresponding to the frequency hopping for PUSCH may be set by frequencyHoppingDCI-0-2 in PUSCH-Config. Also, a frequency hopping scheme corresponding to the frequency hopping for PUSCH may be set by frequencyHopping in PUSCH-Config. Also, a frequency hopping scheme corresponding to the frequency hopping for PUSCH transmission set by frequencyHopping in configuredGrantConfig may be set. The frequency hopping scheme may be any of intra-slot frequency hopping, inter-slot frequency hopping, and inter-repetition frequency hopping. Also, the frequency hopping interval corresponding to intra-slot frequency hopping may be within one slot. 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 or not to perform frequency hopping may be determined based at least on the DCI. Whether or not to apply frequency hopping for the 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 or not to apply frequency hopping for the 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 for PUSCH transmission in one or more slots. For example, intra-slot frequency hopping may be used for PUSCH repetitive transmission. For PUSCH 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 every one or more OFDM symbols. The placement may be switched between first hop or second hop. Also, 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 set 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 resource may be allocated per slot. For example, inter-slot frequency hopping may be applied to PUSCH repeated transmission. Also, when inter-slot frequency hopping is performed for PUSCH, the resource block arrangement may be switched between the first hop and the second hop for each slot. For example, in a certain slot, the slot index n μ s,f If n is an even number, the PUSCH transmission in a certain slot may correspond to the first hop. For example, in a certain slot, slot index n μ s,f If , the PUSCH transmission in a slot may correspond to a second hop. Inter-slot frequency hopping is used for PUSCH repetition type A and PUSCH repetition type B. This 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 return, the first hop and the second hop 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. The higher layer parameters may provide either codebook transmission or non-codebook transmission. For example, if 'codebook' is set for the higher layer parameters, the terminal device 1 may be configured for codebook transmission. For example, if 'nonCodebook' is set for the higher layer parameters, the terminal device 1 may be configured for non-codebook transmission. The higher layer parameters may be txConfig. The higher layer parameters may be usage. For example, if the higher layer parameters are 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, the transmission of the PUSCH may be based on at least one antenna port.

[0248] In the 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 the codebook transmission, the PUSCH may be set to be transmitted semi-statically. The terminal device 1 may determine one or more precoders for the PUSCH transmission. For example, the precoder may be determined based on at least some or all of an SRS resource indicator (SRI), a Transmitted Precoding Matrix Indicator (TPMI), and a transmission rank (Transmission rank, or rank). For example, the SRI may be 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 a layer number (transmission layer number). 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 according to DCI format 0_1 ​​or DCI format 0_2. The higher layer parameter may be srs-ResourceSetToAddModList or srs-ResourceSetToAddModeListDCI-0-2. The higher layer parameter may be a higher 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, SRI and TPMI may be given by the DCI field. TPMI may be used to indicate a precoder. The precoder is a set of v The SRS resource may be applied across layers. When multiple SRS resources are configured, one SRS resource may be selected by the SRI. A transmit precoder (precoder) may be selected from a codebook (uplink codebook). For example, the codebook may include the number of antenna ports. The number of antenna ports is determined by the higher layer parameters nrofSRS-Ports and If 'codebook' is set in the upper layer parameter txConfig, at least one SRS resource may be configured in the terminal device 1. The SRI to be specified is determined by the SRI. The SRS resource may be associated with the transmission of the SRS resource specified by the SRS resource.

[0252] If two SRS resource sets are configured, one or two SRIs and one or two TPMIs 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. The TPMI may be a precoding information field based on a code point of the SRS resource set indication, or a DCI field of precoding information and number of layers. The precoder may be used to indicate a precoder. The precoder may be applied to the 0th to v-1th layers. The precoder may correspond to an SRS resource selected by the SRI. Multiple SRS resources may be configured for the applicable SRS resource set. 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 that the number of antenna ports for the two indicated SRS resources is the same. The number of antenna ports may be provided by a higher layer parameter.

[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 a higher layer parameter. The higher layer parameter may be codebookSubset or codebookSubsetDCI-0-2. Certain higher layer parameters may be set to 'fullyAndPartialAndNonCoherent', 'partialAndNonCoherent', or 'nonCoherent'. For example, if at least certain higher layer parameters are set to 'partialAndNonCoherent', then the codebook subset associated with a 2-port SRS resource (SRS resource with 2 ports) may be 'nonCoherent'. For example, the codebook may include at least one SRS resource with 4 ports and at least one SRS resource with 2 ports.

[0254] The terminal device 1 may report UE capability. When reporting 'UE capability for transmission', the terminal device 1 may not expect a codebook subset having 'fullyAndPartialAndNonCoherent' to be configured.

[0255] When 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 number of antenna ports indicates that the maximum number of SRS antenna ports to be configured is 2, the terminal device 1 may not expect that a higher layer parameter to which 'partialAndNonCoherent' is set is configured. The higher layer parameter 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 based on the SRI from the SRS resource set, 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 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 may indicate the transmission of aperiodic SRS resources. The terminal device 1 may not expect the first higher layer parameter to be set to 'fullpowerMode1' and the second higher layer parameter to be set to 'fullAndPartialAndNonCoherent'.

[0258] The terminal device 1 transmits the SRS link indicated by the DCI format or the higher layer parameters. Use the same antenna port or ports as the SRS port or ports at the source. For example, the SRS port may be an 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 higher layer parameter nrofSRS-Ports may be expected to be set with the same value for all SRS resources from the SRS resource set. 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 resources with the same or different SRS port numbers may be configured in one SRS resource set. A maximum of two different spatial relations may be configured for all SRS resources in an SRS resource set if 'fullpowerMode2' is set for the higher layer parameters. A maximum of two or four SRS resources may be configured in an SRS resource set if 'fullpowerMode2' is set for the higher layer parameters. Also, a maximum of eight SRS resources may be configured in an SRS resource set. An SRS resource set 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 according to DCI format 0_2. The terminal device 1 may determine the precoder and transmission rank of the PUSCH based on the SRI. For example, when multiple SRS resources are configured, the SRI is given by one or two SRS resource indications in the DCI. For example, the SRI may be given by a higher layer parameter, and the SRS resource set applied to the PUSCH may be defined by an entry in the higher layer parameter. The upper 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. Multiple SRS resources transmitted simultaneously may occupy the same resource block. One SRS port may be configured for each SRS resource. One or two SRS resource sets may be configured in the higher layer parameter srs-ResourceSetToAddModList with the higher layer parameter usage set to 'nonCodebook' in the higher 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 of 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. Or it may be applied to multiple PUSCH repetitions. The maximum number of SRS resources per SRS resource set that can be used may be four. The maximum number of SRS resources per SRS resource set configured for packet transmission is 8. Each of the one or two SRIs indicated shall be the SRS resource set identified by the SRI. The SRS resource set may relate to the latest transmission of the SRS resource of the SRS resource set. The SRS transmission may be prior to 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 according to the higher layer parameters. When the search area set is associated with a PDCCH candidate, one PDCCH candidate is used. The upper layer parameter may be a PDCCH candidate that is started 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 one SRS resource set. For example, one SRS resource set 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 an SRS request field. The SRS request field may be one of the DCI fields in any of DCI format 0_1, DCI format 0_2, DCI format 1_1, and DCI format 1_2. 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 an 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 that 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 the 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 the aperiodic NZP CSI-RS resource is configured, the presence of CSI-RS may be indicated by the SRS request field. If the value of the SRS request field is not '00' and the scheduling DCI 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] The terminal device 1 may perform one-to-one mapping. The one-to-one mapping may be a mapping from the SRI to the DMRS port and the corresponding PUSCH layer. There may be 0 to v-1 PUSCH layers, where v may be the number of layers. The number of layers may be set by a higher layer parameter. The terminal device 1 may transmit the PUSCH using the same antenna port as the 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 The SRS port in the (i+1)-th SRS resource may be pi. pi may be 1000+i. That is, pi=1000+i. It's fine.

[0269] In non-codebook transmission, the terminal device 1 may not expect that both the spatial relation information (info) for the SRS resource and the higher layer parameter associatedCSI-RS in the higher layer parameter SRS-ResourceSet for the SRS resource set are configured. The spatial relation information may be determined by the higher layer parameter. The spatial relation information may be the higher layer parameter spatialRelationInfo. In non-codebook transmission, when at least one SRS resource is configured in an SRS resource set with the higher layer parameter set to 'nonCodebook', the terminal device 1 may be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0270] One or more SRS resource sets (SRS resource sets) are The first higher layer parameter may be SRS-ResourceSet or SRS-PosResourceSet. In each SRS resource set, K SRS resources may be configured. K may be an integer equal to or greater than 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 configured in the second higher layer parameter. The second higher layer parameter may be usage. For example, when 'beamManagement' is set for the second higher layer parameter, one SRS resource may be transmitted in each of one or more SRS resource sets. For example, an SRS resource 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.

[0271] In aperiodic SRS, the ISP must select at least one SRS resource from the set of configured SRS resources. , at least one DCI field may be used.

[0272] The one or more SRS parameters may be set 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 number of SRS ports may be determined by a third higher layer parameter. The third higher layer parameter may be nrofSRS-Ports. The SRS ports may be antenna ports. For example, the SRS ports may be antenna ports for the SRS. Time domain behaviour of the SRS resource configuration may be determined by a fourth higher layer parameter. The fourth higher layer parameter may be resourceType. For example, the time domain behaviour may be any of periodic, semi-persistent, and aperiodic. The periodicity and offset may be determined by a fifth higher layer parameter. The periodicity and offset may be slot level. The periodicity and offset may be defined for periodic SRS resources 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. If 'aperiodic' is set for the fourth higher layer parameter, the slot level offset may be defined by a sixth higher layer parameter. The sixth higher layer parameter may be slotOffset. If 'aperiodic' is set for the fourth higher layer parameter, 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 slot in which the 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 the aperiodic SRS. Slot k may be determined by the sixth higher layer parameter. The seventh higher layer parameter may be configured with up to four values. In the aperiodic SRS resource set, a slot-level offset may be defined by the sixth higher layer parameter for each SRS resource.

[0273] Furthermore, the number of OFDM symbols in the SRS resource (the number of consecutive OFDM symbols) and the start OFDM symbol of the SRS resource (the start position in the time domain) may be defined by an eighth higher layer parameter. The eighth higher layer parameter may be resourceMapping. In addition, the repetition factor may be set by the eighth higher layer parameter. If the repetition factor is not set by the eighth higher layer parameter, the repetition factor may be the same as 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 SRSmay 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 location 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.

[0274] Furthermore, the number of combs (the number of transmission combs) may be defined by a 13th upper layer parameter. The 13th upper layer parameter may be transmissionComb. The number of combs may be 2, 4, or 8. The cyclic shift is defined by a 14th upper layer parameter. The fourteenth higher layer parameter may be any one of cyclicShift-n2, cyclicShift-n4, and cyclicShift-n8. The comb offset (transmission comb offset) may be defined by the fifteenth higher layer parameter. The fifteenth higher layer parameter may be any one of combOffset-n2, combOffset-n4, and combOffset-n8. The SRS sequence ID may be defined by the sixteenth higher layer parameter.

[0275] Furthermore, a spatial relation between a reference signal (RS) and an SRS may be defined by a 17th higher layer parameter. For example, a spatial relation between a reference RS (reference signal) and a target SRS may be set by the 17th higher layer parameter. The 17th higher layer parameter may be spatialRelationInfo or spatialRelationInfoPos. The spatial relation setting may include an ID of a reference signal (reference reference signal). 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 set in one serving cell. For example, one serving cell may be indicated by the 18th higher layer parameter. A certain SRS may be set 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 set by the 19th higher layer parameter. The eighteenth upper layer parameter may be servingCellId. The nineteenth upper layer parameter may be uplinkBWP. The 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. The one or more SRS parameters may include some or all of the second to nineteenth upper layer parameters. The SRS being transmitted may be an SRS resource being transmitted. The SRS being transmitted may be an SRS resource set being transmitted. The SRS transmission may be an SRS resource transmission. The SRS transmission may be an SRS resource set transmission.

[0276] 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 one 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 pcs An antenna port may be mapped to each OFDM symbol of the resource. SRS ap , but 4 For example, the Nth SRS resource SRS ap 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, SRS ap,2 The antenna ports may be mapped to slots with odd slot indices. SRS ap is N SRS ap,1 + N SRS ap,2 may be also possible.

[0277] When the PUSCH and the SRS are transmitted in the same slot, the SRS may be configured to be transmitted after the PUSCH transmission. 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 transmission.

[0278] 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. Also, if a PUSCH transmission or a PUCCH transmission overlaps with an SRS transmission, the SRS may not be transmitted. 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, then the SRS may not be transmitted in the overlapping OFDM symbol set.

[0279] If 'periodic' is set for the upper layer parameter resourceType, Target SRS resource with spatial domain transmission filter If a higher layer parameter contains an ID, then a spatial region may be sent. 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 higher layer parameter includes any one of the IDs of 'ssb-Index', 'ssb-IndexServing', and 'ssb-IndexNcell', the reference reference signal may be an SS / PBCH block. For example, if a higher layer parameter includes any one of the IDs of '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 higher layer parameter includes any one of the IDs of 'srs' and 'srs-spatialRelation', the reference reference signal may be a periodic SRS. The reference reference signal may be a DL PRS.

[0280] If 'semi-persistent' is set for the upper layer parameter resourceType, the first slot (n+3N subframe,μ slot SRS transmission may start from the first slot after the first slot. For example, the assumptions on SRS transmission may be applied from the first slot. The 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 on SRS transmission may be applied from the first slot. The activation command may include an assumption on spatial relationship (or spatial relationship). The assumption on spatial relationship may be provided by a list. The list may be a list of reference signal IDs. For example, each of the reference signal IDs may refer to one of an SS / PBCH block, an NZP CSI-RS resource, and 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.

[0281] 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 spatialRelationInfo or spatialRelationInfoPos. stomach.

[0282] 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.

[0283] Terminal device 1 sets active semi-persistent SRS resource A semi-persistent SRS resource configuration may be considered active in one uplink BWP if the SRS resource configuration has a deactivation command and does not receive a deactivation command. The uplink BWP may be active. In addition, the terminal device 1 may have an active semi-persistent SRS resource. It has an active semi-persistent SRS resource configuration and When an activate command is received, the configuration of the semi-persistent SRS resource may be suspended.

[0284] If 'aperiodic' is set for the higher layer parameter resourceType, some or all of actions 1 to 7 may apply.

[0285] Operation 1 may be receiving a configuration of one of one or more SRS resource sets.

[0286] Operation 2 may be receiving a command. The command may be a downlink DCI based command. The command may be a group common DCI based command. The command may be an uplink DCI based command. The minimal time interval is N 2 OFDM symbols and an additional time period T switch The minimum time interval may be a minimum time interval from the last OFDM symbol of the PDCCH that triggers the aperiodic SRS transmission to the first OFDM symbol of the SRS resource. The minimum time interval may be N 2 +14 OFDM symbols and 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 a 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.

[0287] Action 3 may be that aperiodic SRS without data and CSI is triggered. For example, DCI format 0_1 ​​and DCI format 0_2 may trigger aperiodic SRS. A periodic SRS does not have to include data and CSI.

[0288] In operation 4, the terminal device 1 may transmit an SRS in each of one or more SRS resource sets and in the t+1-th 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 a 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 a time domain position corresponding to a plurality of SRS resources in one resource set (SRS resource set). The condition may be to satisfy a UE capability of a minimum timing requirement. The minimum timing requirement may be a 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 an SFI indication in the flexible symbol, an UL cancellation indication, and dynamic scheduling of the downlink channel / signal. 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 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.

[0289] 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). 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.

[0290] Operation 6 may include transmitting the target SRS resource with one spatial domain filter. stomach.

[0291] 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 1st 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 update command may receive a spatial relation update command. The spatial relationship assumption may be provided by a list, which may refer to one or more reference signal IDs.

[0292] Setting 'aperiodic' for the higher layer parameter resourceType may indicate that the SRS resource corresponds to aperiodic SRS. Setting 'semi-persistent' for the higher layer parameter resourceType may indicate that the SRS resource corresponds to semi-persistent SRS. Setting 'periodic' for the higher layer parameter resourceType may indicate that the SRS resource corresponds to periodic SRS.

[0293] The time domain behavior corresponding to one or more SRS resources in one SRS resource set may not be expected to be different. For example, different time domain behaviors for one or more SRS resources in one SRS resource set may not be expected to be configured. Different time domain behaviors may not be expected to be configured between SRS resources and their associated SRS resource sets.

[0294] It may not be expected that the first SRS resource and the second SRS resource are configured to overlap one or more OFDM symbols in one carrier. 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'.

[0295] The first SRS may not be expected to trigger or activate the transmission of the first SRS. For example, the first SRS may be an SRS in one or more OFDM symbols. The 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 an upper layer parameter SRS-PosResource. The second SRS resource may be configured by an upper layer parameter SRS-Resource. The resourceType of both the first SRS resource and the second SRS resource may be 'semi-persistent' or 'aperiodic'.

[0296] In one carrier, configuration of multiple OFDM symbols overlapping with multiple SRS resources may not be expected. Multiple SRS resources may be configured by higher layer parameter SRS-PosResource where resourceType of multiple SRS resources is 'periodic'.

[0297] A 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 higher layer parameter SRS-PosResource, where the resourceType of the SRS resources is 'semi-persistent' or 'aperiodic'.

[0298] For PUCCH and SRS in one carrier, the terminal device 1 may not transmit an SRS when the 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 the transmission of the second SRS is configured or triggered. The second SRS may be either a semi-persistent SRS or a periodic SRS that is configured to be transmitted in the same OFDM symbol as the PUCCH. The second SRS may be an aperiodic SRS that is 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 a PUCCH, then the PUCCH may not be transmitted.

[0299] One SRS resource corresponding to the resourceType with 'aperiodic' set is periodic, Alternatively, when the transmission of the semi-persistent SRS is triggered in one or more OFDM symbols in which the transmission of the semi-persistent SRS is set, the terminal device 1 may transmit the aperiodic SRS resource, and the periodic or semi-persistent SRS in the overlapping OFDM symbols may be dropped. Periodic or semi-persistent SRS in the N symbol may be transmitted. SRS apIf N is 8, the periodic or semi-persistent SRS in non-overlapping OFDM symbols may be dropped. Dropping may mean not transmitting. If an SRS resource corresponding to resourceType in which 'semi-persistent' is set is triggered in one or more OFDM symbols in which periodic SRS transmission is configured, the terminal device 1 may transmit the semi-persistent SRS resource, and the periodic SRS in overlapping OFDM symbols may be dropped. The periodic SRS in non-overlapping OFDM symbols may be transmitted. SRS ap If is equal to 8, then periodic or semi-persistent SRS in overlapping OFDM symbol sets may be dropped.

[0300] A spatial relation (spatialRelationInfo) is activated or updated for the first SRS resource. If the SRS resource 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 a MAC CE for a set of multiple CCs (component carriers) or / and 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.

[0301] For one SRS resource, a repetition factor may be set. The number of repetitions may be set by higher layer parameters. The repetitions are 1, 2, 4 The number of repetitions may be N SRS symb The number of repetitions may be N or less. SRS symb may be the same as N when frequency hopping is not configured. Each of the multiple antenna ports of one SRS resource may be mapped to the first set. For example, when frequency hopping is not configured, each of the multiple antenna ports of one SRS resource in each slot may be mapped to N SRS symb All OFDM symbols The first set may be mapped to the first set in The first set may be a set of carriers, the first set being a set of one or more carriers in the second set. The second set may be a set of one or more PRBs. For example, when 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 SRS symb All of the OFDM symbols may be mapped to the first set.

[0302] Furthermore, when frequency hopping is configured within one SRS resource in each slot and there is no repetition (the repetition number 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 a set of one or more subcarriers. The same transmission comb value may be assumed for the different sets.

[0303] In addition, the terminal device 1 may perform or apply the following in the means 2: When frequency hopping and repetition are configured, one or more antenna ports of one SRS resource Each may be mapped to a subcarrier included in the n-th subcarrier set in an OFDM symbol included in the n-th OFDM symbol set. , R adjacent OFDM symbol pairs, where R is the number of repetitions. The nth subcarrier set may be composed of one or more subcarriers. can be a large integer greater than or equal to 1. For example, n is N SRS symb / R. The n-th subcarrier set may be composed of one or more subcarriers 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 mapped to the same subcarrier set within each of the R OFDM symbol pairs. The frequency hopping may be performed according to the SRS frequency hopping pattern, and the frequency hopping between the two pairs may follow the SRS frequency hopping pattern. The rule may be applied, may be executed, or may be set.

[0304] Furthermore, the terminal device 1 may perform or apply the following in the means 2. When the number of antenna ports is 8, N SRS symb / R may be an even number. If the number of antenna ports is 8, N SRS symb / R may be 2 or more. When the number of antenna ports is 8, the first antenna The antenna port set and a second antenna port set may be determined. may be configured with four antenna ports. The first antenna port set may be configured with the first OFDM The first subcarrier set mapped in the symbol may be the same as the second subcarrier set to which the second antenna port set is mapped in the second OFDM symbol. The first OFDM symbol may be different from the second OFDM symbol.

[0305] For example, the antenna ports included in the first antenna port set of one SRS resource Each of the first sub-symbols includes a first OFDM symbol 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 Frequency hopping may be applied for every / R 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.

[0306] For example, when the number of antenna ports is 4 or less, the first hopping frequency (first SRS hopping frequency) is used. If the number of antenna ports is eight, 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.

[0307] 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 may be used. The full hopping bandwidth is N SRS symb The subbands 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 may consist of R adjacent OFDM symbols. Each of the antenna ports of the signal receiving element may be mapped to the same subcarrier set in each OFDM symbol set. An OFDM symbol set is a pair of R adjacent OFDM symbols. A subcarrier set may be a set of one or more subcarriers. A pair of R adjacent OFDM symbols may be a resource OFDM symbol.

[0308] Periodic or semi-persistent SRS resources with inter-slot or intra-slot hopping within one BWP may be configured. 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. 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, where each of the multiple antenna ports may support a different sub-channel across two pairs in each slot. Each of the two pairs may be R adjacent OFDM symbols. Each of the antenna ports of the SRS resource may be assigned the same number of antenna ports in each pair. A first portion of the antenna ports of the SRS resources may be mapped to the same subcarrier set within each pair, and a first portion of the antenna ports of the SRS resources may be mapped to the first subcarrier set within each pair, and a second portion of the antenna ports of the SRS resources may be mapped to the second subcarrier set within each pair.

[0309] SRS resources may be configured by higher layer parameters. For example, the higher layer parameter may be SRS-PosResource. A number of antenna ports may be determined for the SRS resource. A number of consecutive OFDM symbols may be determined for the SRS resource. A time domain A frequency domain starting position 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.

[0310] 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 and the start position of the time domain l 0 and , the starting position k in the frequency domain 0 The number of antenna ports N may be a part or whole of the above. SRSap may be the number of antenna ports for the 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 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 antenna port may be any of 1000, 1001, 1002, 1003, 1004, 1005, 1006, or 1007.

[0311] 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 a higher layer parameter. The higher layer parameter may be nrofSymbols. The higher layer parameter may be the higher layer parameter resourceMapping that includes a field of nrofSymbols.

[0312] Start position of the time domain 0 is N slot symb -1-l offset The offset may be given by Tol offset The offset l can be an integer between 0 and 13. offsetThe slot's You may count backwards. 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 more.

[0313] A sounding reference signal sequence (SRS) may be generated. For example, one SRS sequence may be generated for one SRS resource. One SRS sequence r (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

[0314] In the 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 ranges from 0 to N SRS symb It may be an index up to -1. δ in is log 2 (K TC ) may be used. TC can be 2, 4, or 8. The number of combs K TC may be determined by higher layer parameters. The layer parameter may be transmissionComb.

[0315] 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 on at least the group number u and the base sequence number v. N ZC is a value For example, a value may be M SRS SC,b may be also possible.

[0316] 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.

number

[0317] Maximum number of cyclic shifts (max value) n CS,max SRS is the number of combs K TC 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,maxSRS may be 12. For example, K TC If is 8, then n CS,max SRS may be 6. CS,i SRS may be determined according to any one of Equation 6, Equation 7, and Equation 8.

number

number

number

[0318] 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 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 may be that the number of Number of antenna ports N SRS ap is 8 and the maximum number of cyclic shifts n CS,max SRS For example, if condition 2 is satisfied, n CS,i SRS may be determined by Equation 7. Condition 2 is the number of antenna ports N SRS ap Condition 2 can be 8. , number of antenna ports N SRS ap is 8 and the maximum number of cyclic shifts nCS,max SRS The second condition may be that the number of antenna ports N SRS ap is 8 and the maximum number of cyclic shifts n CS,max SRS For example, if condition 1 is met, , and condition 2 is satisfied, then n CS,i SRS may be determined by Equation 6. Also, if condition 1 is satisfied and condition 2 is satisfied, 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 formula 6 or formula 8 n CS SRS is from 0 to n CS,max SRS Can be an integer up to -1 .n CS SRS may be determined by a higher layer parameter, which may be transmissionComb.

[0319] The sequence number u may be determined based on at least an OFDM symbol index l′. Also, the sequence number u may 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.

[0320] The SRS may be transmitted in the SRS resource. When the SRS is transmitted in the SRS resource, the SRS sequence r (pi) (n,l') may be multiplexed. For example, the start r (pi) (0, l') is mapped to resource element (k, l) in a certain 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 a slot corresponding to the kth slot. That is, the SRS sequence may be mapped to a physical resource. (pi) (k', l') may be mapped to a resource element according to Equation 9. Alternatively, 0 may be mapped to the resource element.

number

[0321] β SRS may be a scaling factor or an amplitude scaling factor. The length of the SRS sequence M SRS SC,b is the number of combs K TC and the number of subcarriers contained in one resource block, N RB SC The determination may be based at least on:

[0322] Frequency position K of the resource element TC k'+k (pi) 0 varies depending on antenna port pi Frequency position K TC k'+k (pi)0 may be one or more subcarriers. TC k'+k (pi) 0 may be a 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 Formula 10 or Formula 11. The determination may be made by:

number

number

[0323] For example, if condition 3 is satisfied, 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 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 n CS SRS 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 satisfied, k (pi) TC is k bar TC The comb number offset k may bebar TC is a higher layer parameter The higher layer parameter may be transmissionComb.

[0324] For example, if condition 4 is satisfied, k (pi) TC may be determined by Equation 11. For example, Condition 4 is at least the number of antenna ports N SRS ap For example, condition 4 may include that at least antenna port pi is one of {1001, 1003, 1005, 1007}. For example, condition 4 may include that at least 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}.

[0325] 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 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' may be expressed as floor(kN / M SRS SC,b ). Also, index k' may be 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 floor(l*2 / N SRS symb ). Also, index l' may be mod(l,2). "*" may represent multiplication. In the means 1, the SRS sequence may be determined based at least on the first sequence. In the means 2, the SRS sequence may be determined based at least on the second sequence.

[0326] 9 is a diagram illustrating an example of SRS (SRS resource) transmission according to one embodiment of the present invention. An SRS resource 900 may be determined in a slot 910. The SRS resource 900 may be transmitted. An SRS corresponding to the SRS resource 900 may be transmitted. An SRS may be transmitted in the SRS resource 900. An SRS resource set corresponding to the SRS resource 900 may be transmitted. The SRS resource 900 may be associated with an aperiodic SRS. The SRS resource 900 may be associated with a periodic SRS. The SRS resource 900 may be associated with a semi-persistent SRS. For the resourceType, 'aperiodic' may be set, 'semi-persistent' may be set, or 'periodic' may be set. An SRS resource 900 to which one or more SRS sequences are mapped may be transmitted. The SRS resource 900 may be transmitted as indicated by the SRI in the DCI. The SRS resource 900 may be specified by an SRI. The SRS resource 900 may be specified by an upper layer packet. The SRS resource 900 may be indicated by a 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 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 a higher layer parameter. 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.

[0327] 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.

[0328] Number of antenna ports for SRS resource 900 N SRS ap may be 8. The number of consecutive OFDM symbols for the SRS resource 900, N SRS symb may be 4. The time domain starting position l for the SRS resource 900 0 The number of SRS resources 900 may be 4. The SRS resource 900 may be comprised of an OFDM symbol 920, an OFDM symbol 921, an OFDM symbol 922, and an OFDM symbol 923. The SRS resource 900 may occupy at least an OFDM symbol 920, an OFDM symbol 921, an OFDM symbol 922, and an OFDM symbol 923. Even though OFDM symbol 921, OFDM symbol 922, and OFDM symbol 923 are adjacent OFDM symbols, The first OFDM symbol set is composed of OFDM symbol 920 and OFDM symbol 921. The second OFDM symbol set may include OFDM symbol 922 and OFDM symbol 923. The number of OFDM symbols included in the OFDM symbol set may be a repetition factor. The repetition factor for the SRS resource 900 may be two.

[0329] The number of subcarriers for the SRS resource 900 is M SRS SC,bIn FIG. 9, the multiple black blocks of OFDM symbol 920 may represent the first subcarrier set. In FIG. 9, the multiple black blocks of OFDM symbol 921 represent the second subcarrier set. In FIG. 9, the multiple black blocks of OFDM symbol 922 may represent the third In FIG. 9, the black blocks of OFDM symbol 923 may be the fourth subcarrier set. The first subcarrier set may be the second 9. The second subcarrier set may be different from the third subcarrier set. The third subcarrier set may be the same as the fourth subcarrier set. In the example in FIG. 9, frequency hopping may be configured. In the example in FIG. 9, repetition may be configured. The first subcarrier set, the second subcarrier set, the third subcarrier set, and the fourth subcarrier set may assume the same comb number.

[0330] For example, eight SRS sequences may be mapped to SRS resource 900. For example, eight SRS sequences may be multiplexed in SRS resource 900.

[0331] 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 SRS. 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.

[0332] 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.

[0333] The first SRS sequence may be determined based at least on the first cyclic shift. The second SRS sequence may be determined based at least on the second cyclic shift. The third SRS sequence may be determined based at least on the third cyclic shift. The fourth SRS sequence The first SRS sequence may be determined based at least on the fourth cyclic shift. The fifth SRS sequence may be determined based at least on the fifth cyclic shift. The sixth SRS sequence may be determined based at least on the sixth cyclic shift. The seventh SRS sequence may be determined based at least on a seventh cyclic shift. The eighth SRS sequence may be determined based at least on an eighth cyclic shift. For example, the first cyclic shift may be determined based on at least the first cyclic shift. , a second cyclic shift, a third cyclic shift, and a fourth cyclic shift , the fifth cyclic shift, the sixth cyclic shift, and the seventh cyclic shift. Some or all of the first cyclic shift and the eighth cyclic shift may be determined according to Equation 5.

[0334] For example, one or more SRS sequences may be mapped to an SRS resource by the means 1 or the means 2. For example, one or more SRSs may be mapped to an SRS resource by the means 1 or the means 2. For example, multiple antenna ports may be mapped to an SRS resource by the means 1 or the means 2. For example, an SRS sequence to be mapped to an SRS resource by the means 1 or the means 2 may be determined.

[0335] In the method 1, N of the SRS resource 900 SRS ap Antenna ports are mapped to each OFDM symbol That is, N SRS ap Each antenna port has 920 OFDM symbols and 921, OFDM symbol 922, and OFDM symbol 923, respectively. For example, all antenna ports of the SRS resource 900 may be mapped to each OFDM symbol.

[0336] In the first means, the first antenna port set may be comprised of a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, and the second antenna port set may be comprised of a fifth antenna port, a sixth antenna port, a seventh antenna port, and an eighth antenna port.

[0337] In the first embodiment, the cyclic shift corresponding to each of the antenna ports in the first antenna port set may be a first value. The cyclic shift corresponding to each of the antenna ports in the second antenna port set may be a second value. For example, the first value and the second value may be different, for example, a first cyclic shift corresponding to a first antenna port, a second cyclic shift corresponding to a second antenna port, a third cyclic shift corresponding to a third antenna port, and a fourth cyclic shift corresponding to a fourth antenna port. For example, a fifth cyclic shift corresponding to a fifth antenna port and a sixth cyclic shift corresponding to a sixth antenna port may be the same. a seventh cyclic shift corresponding to the seventh antenna port, and a eighth cyclic shift corresponding to the eighth antenna port. The eighth cyclic shift corresponding to the antenna port may be the same as the eighth cyclic shift corresponding to the antenna port. CS,i SRS may be determined by Equation 6. If condition 2 is met, If so, n CS,i SRS may be determined by Equation 7. If condition 3 is satisfied, k (pi) TC may be determined by Equation 10. If condition 4 is satisfied, k (pi) TC may be determined according to Equation 11.

[0338] In the means 1, an n-th SRS sequence may be determined. An SRS resource to which the n-th SRS sequence is mapped may be transmitted, where n may be an integer from 1 to 8. The n-th SRS sequence may be determined based at least on an n-th cyclic shift. The n-th SRS sequence may be mapped to each OFDM symbol. The n-th cyclic shift may be provided for the n-th antenna port. The n-th SRS sequence may be determined for the n-th antenna port. The n-th cyclic shift may be less than or equal to a maximum number of cyclic shifts n. CS,max SRS When n is any one of 1 to 4, the nth cyclic shift may be determined based at least on the first If n is between 5 and 8, the nth cyclic shift may be may be a value of

[0339] In the first means, the n-th SRS sequence is a first subcarrier set and a second subcarrier set. The subcarrier set may be mapped to any of the frequency positions K TC k'+k (pi) 0 The n-th SRS may be The nth SRS sequence may be mapped to a first subcarrier set in a first OFDM symbol. The nth SRS sequence may be mapped to a second subcarrier set in a second OFDM symbol. The nth SRS sequence may be mapped to a third subcarrier set in a third OFDM symbol. The fourth SRS sequence may be mapped to a fourth subcarrier set in a fourth OFDM symbol.

[0340] In the method 2, N of the SRS resource 900 SRS symb N of the SRS resources 900 may be an even number. SRS a pEach antenna port may be mapped to each OFDM symbol set (OFDM symbol pair). For example, the first OFDM symbol set includes OFDM symbol 920 and OFDM symbol 921. For example, the second OFDM symbol set may include OFDM symbol 922 and OFDM symbol 922 The N SRS resources 900 may include SRS ap 1 / 2 antenna ports may be mapped to each OFDM symbol.

[0341] In the second means, when the PUSCH / PUCCH and the SRS (SRS resource 900) overlap, the SRS may not be transmitted. For example, when the PUSCH / PUCCH and the SRS overlap, the SRS may not be transmitted in the overlapping OFDM symbol set.

[0342] In the means 2, the first antenna port set may be composed of a first antenna port and a second antenna port. The second antenna port set may be composed of a third antenna port and a fourth antenna port. The third antenna port set may be composed of a fifth antenna port and a sixth antenna port. The fourth antenna port set may be composed of a seventh antenna port and an eighth antenna port.

[0343] In the means 2, the first antenna port pair may be composed of a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port. The antenna port pair consists of the fifth antenna port, the sixth antenna port, and the seventh antenna port. The antenna may be configured with a first antenna port and an eighth antenna port.

[0344] In the means 2, the cyclic shift corresponding to each of the antenna ports in the first antenna port set may be a first value. The cyclic shift corresponding to each of the antenna ports in the second antenna port set may be a second value. The cyclic shift corresponding to each of the antenna ports in the third antenna port set may be a third value. The cyclic shift corresponding to each of the antenna ports in the fourth antenna port set may be a fourth value. For example, the first value, the second value, the third value, and the fourth value may be different. The first cyclic shift corresponding to the first antenna port and the second cyclic shift corresponding to the second antenna port may be a fourth value. and may be the same. A third cyclic shift corresponding to the third antenna port and a fourth cyclic shift corresponding to the fourth antenna port may be the same. For example, a fifth cyclic shift corresponding to the fifth antenna port and a sixth cyclic shift corresponding to the sixth antenna port may be the same. For example, a seventh cyclic shift corresponding to the seventh antenna port and an eighth cyclic shift corresponding to the eighth antenna port may be the same. In the means 2, n CS,i SRS does not have to be determined by Equation 7. (pi) TC does not have to be determined by Equation 11.

[0345] In the means 2, an n-th SRS sequence may be determined. An SRS resource to which the n-th SRS sequence is mapped may be transmitted. n may be an integer from 1 to 8. The n-th SRS sequence may be determined based at least on the n-th cyclic shift. The n-th SRS sequence may not be mapped to each OFDM symbol. For example, when n is any of 1 to 4, the n-th SRS sequence may be For example, if n is any of 5 to 8, the nth SRS sequence may be mapped to the first OFDM symbol. For example, if n is any of 1 to 4, the nth SRS sequence may be mapped to the third OFDM symbol. For example, if n is any of 5 to 8, the nth SRS sequence may be mapped to the fourth OFDM symbol. The nth cyclic shift may be provided for the nth antenna port. An SRS sequence may be determined for the nth antenna port.

[0346] In the second means, the n-th SRS sequence is a first subcarrier set and a second subcarrier set. , the third subcarrier set, or the fourth subcarrier set. The subcarrier set may be located at frequency position K TC k'+k (pi) 0 If n is any of 1 to 4, the nth SRS sequence may be mapped to a first subcarrier set in a first OFDM symbol. If n is any of 5 to 8, the nth SRS sequence may be mapped to a second subcarrier set in a second OFDM symbol. If n is any of 1 to 4, the nth SRS sequence may be mapped to a third subcarrier set in a third OFDM symbol. If n is any of 5 to 8, the fourth SRS sequence may be mapped to a fourth subcarrier set in a fourth OFDM symbol.

[0347] Various aspects of the device according to one aspect of this embodiment will be described below.

[0348] (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: an SRS sequence to which an n-th SRS sequence is mapped; a transmitter for transmitting a source, the nth SRS sequence being generated, the nth SRS sequence being determined based at least on an nth cyclic shift, the nth cyclic shift being provided for an nth antenna port, the nth cyclic shift being determined based at least on a maximum number of cyclic shifts for the SRS resource, the n being an integer from 1 to 4, and the first cyclic shift, the second cyclic shift, the third cyclic shift, and the fourth cyclic shift being the same when the maximum number of cyclic shifts is 6, the first cyclic shift and the second cyclic shift being the same when the maximum number of cyclic shifts is 8, the second cyclic shift and the third cyclic shift being different when the maximum number of cyclic shifts is 8, and the third cyclic shift and the fourth cyclic shift being the same when the maximum number of cyclic shifts is 8.

[0349] (2) A second aspect of the present invention is a terminal device comprising: a transmitting unit that transmits an SRS resource to which a first SRS sequence and a second SRS sequence are mapped, the first SRS sequence and the second SRS sequence are generated, the first SRS sequence is determined based at least on a first cyclic shift corresponding to a first antenna port, the second SRS sequence is determined based at least on a second cyclic shift corresponding to a second antenna port, the first cyclic shift has the same value as the second cyclic shift, the first antenna port is different from the second antenna port, and the first SRS sequence is determined based on a second cyclic shift corresponding to a second antenna port before the first SRS sequence is mapped. The first OFDM symbol in the resource is a symbol in the resource to which the second SRS sequence is mapped. The second OFDM symbol in the signal processing section is different from the terminal device.

[0350] (3) A third aspect of the present invention is a base station device, comprising: an SRS to which an n-th SRS sequence is mapped; a receiver for receiving a resource, the nth SRS sequence being generated, the nth SRS sequence being determined based at least on an nth cyclic shift, the nth cyclic shift being provided for an nth antenna port, the nth cyclic shift being a time shift of the SRS is determined based at least on a maximum number of cyclic shifts for a resource, where n is an integer from 1 to 4, and the first cyclic shift, the second cyclic shift, the third cyclic shift, and the fourth cyclic shift are the same when the maximum number of cyclic shifts is 6, the first cyclic shift and the second cyclic shift are the same when the maximum number of cyclic shifts is 8, the second cyclic shift and the third cyclic shift are different when the maximum number of cyclic shifts is 8, and the third cyclic shift and the fourth cyclic shift are the same when the maximum number of cyclic shifts is 8.

[0351] The programs operating in the base station device 3 and terminal device 1 according to the present invention may be programs (programs that make a computer function) that control a CPU (Central Processing Unit) or the like so as to realize the functions of the above-mentioned embodiments according to the present invention. Information handled by these devices is temporarily stored in a 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 necessary.

[0352] In addition, a part of the terminal device 1 and the base station device 3 in the above-mentioned embodiment may be realized by a computer. In that case, a program for realizing this control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read into a computer system and executed to realize the control function.

[0353] The "computer system" 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 "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into the computer system.

[0354] 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, and a medium that stores a program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client in such a case. The above program may be one that realizes part of the above-mentioned functions, or may be one that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

[0355] Furthermore, the base station device 3 in the above-described embodiment can also be realized as an aggregate (device group) consisting of a plurality of 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 an aggregate.

[0356] In addition, the base station device 3 in the above-mentioned embodiment may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or an NG-RAN (NextGen RAN, NR RAN). In addition, the base station device 3 in the above-mentioned embodiment may have a part or all of the functions of an upper node for an eNodeB and / or a gNB.

[0357] Furthermore, some or all of the terminal device 1 and base station device 3 in the above-described embodiment may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chip set. Each functional block of the terminal device 1 and the base station device 3 may be individually integrated into a chip, or may be integrated into a chip in part or in whole. The integrated circuit method is not limited to LSI, but may be a dedicated circuit, It may also be realized by a general-purpose processor. Also, with the advancement of semiconductor technology, it may be possible to use a centralized processor that replaces LSI. When a technology for integrated circuitry emerges, it is also possible to use integrated circuits based on that technology.

[0358] In addition, 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.

[0359] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the gist of the present invention are also included. Furthermore, the present invention can be modified in various ways 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 replaced with elements that have the same effect are also included. [Explanation of symbols]

[0360] 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 Media 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 A set of resource elements for 700 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 Slots 920, 921, 922, 923 OFDM symbols

Claims

1. A transmitter for transmitting an SRS resource to which the n-th SRS sequence is mapped, the nth SRS sequence is generated; the nth SRS sequence is determined based at least on an nth cyclic shift; the n cyclic shift is given for an n th antenna port; the nth cyclic shift is determined based at least on a maximum number of cyclic shifts for the SRS resource; wherein n is an integer from 1 to 4; When the maximum number of cyclic shifts is 6, the first cyclic shift, the second cyclic shift, the third cyclic shift, and the fourth cyclic shift are The shift is the same as Terminal device.

2. When the maximum number of cyclic shifts is 8, the first cyclic shift and the second cyclic shift are the same; When the maximum number of cyclic shifts is 8, the second cyclic shift and the third cyclic shift are different, When the maximum number of cyclic shifts is 8, the third cyclic shift and the fourth cyclic shift are the same. The terminal device according to claim 1 .

3. A transmitter for transmitting an SRS resource to which the first SRS sequence and the second SRS sequence are mapped. picture, the first SRS sequence and the second SRS sequence are generated; the first SRS sequence is determined based at least on a first cyclic shift corresponding to a first antenna port; The second SRS sequence is slightly shifted to a second cyclic shift corresponding to a second antenna port. At least, the determination is based on the first cyclic shift is the same value as the second cyclic shift; the first antenna port is different from the second antenna port; A first OFDM symbol in the resource to which the first SRS sequence is mapped is different from a second OFDM symbol in the resource to which the second SRS sequence is mapped. Terminal device.

4. A receiving unit for receiving an SRS resource to which an n-th SRS sequence is mapped, the nth SRS sequence is generated; the nth SRS sequence is determined based at least on an nth cyclic shift; the n cyclic shift is given for an n th antenna port; the nth cyclic shift is determined based at least on a maximum number of cyclic shifts for the SRS resource; wherein n is an integer from 1 to 4; When the maximum number of cyclic shifts is 6, the first cyclic shift, the second cyclic shift, the third cyclic shift, and the fourth cyclic shift are The shift is the same as Base station equipment.

5. When the maximum number of cyclic shifts is 8, the first cyclic shift and the second cyclic shift are the same; If the maximum number of cyclic shifts is 8, the second cyclic shift and the previous Unlike the third cyclic shift, When the maximum number of cyclic shifts is 8, the third cyclic shift and the fourth cyclic shift are the same. The base station device according to claim 4.

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