Patent Publication Number: US-2023136327-A1

Title: User equipments, base stations, and methods

Description:
TECHNICAL FIELD 
     The present invention relates to a terminal device, a base station device, and a communication method. 
     BACKGROUND ART 
     In the 3rd Generation Partnership Project (3GPP), a radio access method and a radio network for cellular mobile communications (hereinafter, referred to as Long Term Evolution, or Evolved Universal Terrestrial Radio Access) have been studied. In LTE (Long Term Evolution), a base station device is also referred to as an evolved NodeB (eNodeB), and a terminal device is also referred to as a User Equipment (UE). LTE is a cellular communication system in which multiple areas are deployed in a cellular structure, with each of the multiple areas being covered by a base station device. A single base station device may manage multiple cells. Evolved Universal Terrestrial Radio Access is also referred as E-UTRA. 
     In the 3GPP, the next generation standard (New Radio: NR) has been studied in order to make a proposal to the International-Mobile-Telecommunication-2020 (IMT-2020) which is a standard for the next generation mobile communication system defined by the International Telecommunications Union (ITU). NR has been expected to satisfy a requirement considering three scenarios of enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC), in a single technology framework. 
     For example, wireless communication devices may communicate with one or more devices using a communication structure. However, the communication structure may only offer limited flexibility and/or efficiency. As illustrated by this discussion, systems and methods that improve communication flexibility and/or efficiency may be beneficial. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a conceptual diagram of a wireless communication system according to an aspect of the present embodiment; 
         FIG.  2    is an example showing the relationship between subcarrier-spacing configuration u, a number of OFDM symbols per slot N slot   symb , and the CP configuration according to an aspect of the present embodiment; 
         FIG.  3    is a diagram showing an example of a method of configuring a resource grid according to an aspect of the present embodiment; 
         FIG.  4    is a diagram showing a configuration example of a resource grid  3001  according to an aspect of the present embodiment; 
         FIG.  5    is a schematic block diagram showing a configuration example of the base station device  3  according to an aspect of the present embodiment; 
         FIG.  6    is a schematic block diagram showing a configuration example of the terminal device  1  according to an aspect of the present embodiment; 
         FIG.  7    is a diagram showing a configuration example of an SS/PBCH block according to an aspect of the present embodiment; 
         FIG.  8    is a diagram illustrating an example of setting of a PRACH resource according to an aspect of the present embodiment; 
         FIG.  9    is an example of an association between indexes of SS/PBCH block candidates and PRACH occasions (SS-RO association) in a case that N RO   preamble =64, N SSB   preamble,CBRA =64, N SSB   RO =1, and the first bitmap is set to {1,1,0,1,0,1,1,0} according to an aspect of the embodiment; 
         FIG.  10    is an example of an association between indexes of SS/PBCH block candidates and PRACH occasions (SS-RO association) in a case that N RO   preamble =64, N SSB   preamble,CBRA =64, N SSB   RO =1, and the first bitmap is set to {1,1,0,1,0,1,0,0} according to an aspect of the embodiment; 
         FIG.  11    is a diagram showing an example of the monitoring occasion of the search-space-set according to an aspect of the present embodiment; 
         FIG.  12    is a diagram illustrating an example of the counting procedure according to an aspect of the present embodiment; 
         FIG.  13    is a diagram illustrating an example of one or more PUSCH transmissions based on multiple scheduled frequency domain resource allocations; 
         FIG.  14    is a diagram illustrating an example of determination of multiple frequency domain resource allocations; 
         FIG.  15    is a diagram illustrating an example of determination of multiple frequency domain resource allocations; and 
         FIG.  16    is a diagram illustrating an example of determination of multiple frequency domain resource allocations. 
         FIG.  17    is a diagram illustrating an example of determining a size of transport block for a first PUSCH and a second PUSCH. 
         FIG.  18    is a diagram illustrating an example of determining a size of transport block for a first set of PUSCHs and a second set of PUSCHs. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     floor (CX) may be a floor function for real number CX. For example, floor (CX) may be a function that provides the largest integer within a range that does not exceed the real number CX. ceil (DX) may be a ceiling function to a real number DX. For example, ceil (DX) may be a function that provides the smallest integer within the range not less than the real number DX. mod (EX, FX) may be a function that provides the remainder obtained by dividing EX by FX. mod (EX, FX) may be a function that provides a value which corresponds to the remainder of dividing EX by FX. exp (GX) may be an exponential function that may be expressed as e^GX, where e is the Napier number. (HX)^(IX) indicates IX to the power of HX. log B (JX) indicates logarithm of JX to base B. 
     In a wireless communication system according to one aspect of the present embodiment, at least OFDM (Orthogonal Frequency Division Multiplex) is used. An OFDM symbol is a unit of time domain of the OFDM. The OFDM symbol includes at least one or more subcarriers. An OFDM symbol is converted to a time-continuous signal in baseband signal generation. In downlink, at least CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplex) is used. In uplink, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex) is used. DFT-s-OFDM may be given by applying transform precoding to CP-OFDM. CP-OFDM is OFDM using CP (Cyclic Prefix). 
     The OFDM symbol may be a designation including a CP added to the OFDM symbol. That is, an OFDM symbol may be configured to include the OFDM symbol and a CP added to the OFDM symbol. 
       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 device  1 A to  1 C and a base station device  3  (BS # 3 : Base station # 3 ). Hereinafter, the terminal devices  1 A to  1 C are also referred to as a terminal device  1  (UE # 1 : User Equipment # 1 ). 
     The base station device  3  may be configured to include one or more transmission devices (or transmission points, transmission devices, reception devices, transmission points, reception points). When the base station device  3  is configured by a plurality of transmission devices, each of the plurality of transmission devices may be arranged at a different position. 
     The base station device  3  may provide one or more serving cells. A serving cell may be defined as a set of resources used for wireless communication. A serving cell is also referred to as a cell. 
     A serving cell may be configured to include at least one downlink component carrier (downlink carrier) and/or one uplink component carrier (uplink carrier). A serving cell may be configured to include at least two or more downlink component carriers and/or two or more uplink component carriers. A downlink component carrier and an uplink component carrier are also referred to as component carriers (carriers). 
     For example, one resource grid may be provided for one component carrier. For example, one resource grid may be provided for one component carrier and a subcarrier-spacing configuration u. A subcarrier-spacing configuration u is also referred to as numerology. A resource grid includes N size, u   grid, x N RB   sc  subcarriers. The resource grid starts from a common resource block with index N start, u   grid . The common resource block with the index N start, u   grid  is also referred to as a reference point of the resource grid. The resource grid includes N subframe, u   symb  OFDM symbols. The subscript x indicates the transmission direction, and indicates either downlink or uplink. One resource grid is provided for an antenna port p, a subcarrier-spacing configuration u, and a transmission direction x. 
     N size, u   grid,x  and N start, u   grid  are given based at least on a higher-layer parameter (e.g. referred to as higher-layer parameter CarrierBandwidth). The higher-layer parameter is used to define one or more SCS (SubCarrier-Spacing) specific carriers. One resource grid corresponds to one SCS specific carrier. One component carrier may comprise one or more SCS specific carriers. The SCS specific carrier may be included in a system information block (SIB). For each SCS specific carrier, a subcarrier-spacing configuration u may be provided. 
       FIG.  2    is an example showing the relationship between subcarrier-spacing configuration u, a number of OFDM symbols per slot N slot   symb , and the CP configuration according to an aspect of the present embodiment. In  FIG.  2 A , for example, when the subcarrier-spacing configuration u is set to 2 and the CP configuration is set to normal CP (normal cyclic prefix), N slot   symb =14, N frame, u   slot =4. Further, in  FIG.  2 B , for example, when the subcarrier-spacing configuration u is set to 2 and the CP configuration is set to an extended CP (extended cyclic prefix), N slot   symb =12, N frame, u   slot =40, N subframe, u   slot 4. 
     In the wireless communication system according to an aspect of the present embodiment, a time unit T c  may be used to represent the length of the time domain. The time unit T c  is T c =1/(df max *N f ). It is df max =480 kHz. It is N f =4096. The constant k is k=df max *N f /(df ref N f, ref )=64. df ref  is 15 kHz. N f, ref  is 2048. 
     Transmission of signals in the downlink and/or transmission of signals in the uplink may be organized into radio frames (system frames, frames) of length T f . It is T f =(df max *N f /100)*T s =10 ms. One radio frame is configured to include ten subframes. The subframe length is T sf =(df max N f /1000) T s =1 ms. A number of OFDM symbols per subframe is N subframe, u   symb =N slot   symb N subframe, u   slot . 
     For a subcarrier-spacing configuration u, a number of slots included in a subframe and indexes may be given. For example, slot index nu, may be given in ascending order with an integer value ranging from 0 to N subframe, u   slot −1 in a subframe. For subcarrier-spacing configuration u, a number of slots included in a radio frame and indexes of slots included in the radio frame may be given. Also, the slot index n u   s, f  may be given in ascending order with an integer value ranging from 0 to N frame,u   slot −1 in the radio frame. Consecutive N slot   symb  OFDM symbols may be included in one slot. It is N slot   symb =14. 
       FIG.  3    is a diagram showing an example of a method of configuring a resource grid according to an aspect of the present embodiment. The horizontal axis in  FIG.  3    indicates frequency domain.  FIG.  3    shows a configuration example of a resource grid of subcarrier-spacing configuration u=u 1  in the component carrier  300  and a configuration example of a resource grid of subcarrier-spacing configuration u=u 2  in a component carrier. One or more subcarrier-spacing configuration may be set for a component carrier. Although it is assumed in  FIG.  3    that u 1 =u 2 −1, various aspects of this embodiment are not limited to the condition of u 1 =u 2 −1. 
     The component carrier  300  is a band having a predetermined width in the frequency domain. 
     Point (Point)  3000  is an identifier for identifying a subcarrier. Point  3000  is also referred to as point A. The common resource block (CRB: Common resource block) set  3100  is a set of common resource blocks for the subcarrier-spacing configuration u 1 . 
     Among the common resource block-set  3100 , the common resource block including the point  3000  (the block indicated by the upper right diagonal line in  FIG.  3   ) is also referred to as a reference point of the common resource block-set  3100 . The reference point of the common resource block-set  3100  may be a common resource block with index 0 in the common resource block-set  3100 . 
     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 indicated by a number of common resource blocks which is relative to the subcarrier-spacing configuration u 1 . The resource grid  3001  includes N size,u   grid1,x  common resource blocks starting from the reference point of the resource grid  3001 . 
     The offset  3013  is an offset from the reference point of the resource grid  3001  to the reference point (N start,u   BWP,i1 ) of the BWP (BandWidth Part)  3003  of the index i1. 
     Common resource block-set  3200  is a set of common resource blocks with respect to subcarrier-spacing configuration u 2 . 
     A common resource block including the point  3000  (a block indicated by a left-upward hatching in  FIG.  3   ) in the common resource block-set  3200  is also referred to as a reference point of the common resource block-set  3200 . The reference point of the common resource block-set  3200  may be a common resource block with index 0 in the common resource block-set  3200 . 
     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 indicated by a number of common resource blocks for subcarrier-spacing configuration u=u 2 . The resource grid  3002  includes N size,u   grid2,x  common resource blocks starting from the reference point of the resource grid  3002 . 
     The offset  3014  is an offset from the reference point of the resource grid  3002  to the reference point (N start,u   BWP,i2 ) of the BWP  3004  with index i 2 . 
       FIG.  4    is a diagram showing a configuration example of a resource grid  3001  according to an aspect of the present embodiment. In the resource grid of  FIG.  4   , the horizontal axis indicates OFDM symbol index l sym , and the vertical axis indicates the subcarrier index k sc . The resource grid  3001  includes N size,u   grid1,X N RB   sc  subcarriers, and includes N subframes,u   symb  OFDM symbols. A resource specified by the subcarrier index k sc  and the OFDM symbol index l sym  in a resource grid is also referred to as a resource element (RE: Resource Element). 
     A resource block (RB: Resource Block) includes N RB   sc  consecutive subcarriers. A resource block is a generic name of a common resource block, a physical resource block (PRB: Physical Resource Block), and a virtual resource block (VRB: Virtual Resource Block). N RB   sc  may be 12. 
     A resource block unit is a set of resources that corresponds to one OFDM symbol in one resource block. That is, one resource block unit includes 12 resource elements which corresponds to one OFDM symbol in one resource block. 
     Common resource blocks for a subcarrier-spacing configuration u are indexed in ascending order from 0 in the frequency domain in a common resource block-set. The common resource block with index 0 for the subcarrier-spacing configuration u includes (or collides with, matches) the point  3000 . The index n u   CRB  of the common resource block with respect to the subcarrier-spacing configuration u satisfies the relationship of n u   CRB =ceil (k sc /N RB   sc ). The subcarrier with k sc =0 is a subcarrier with the same center frequency as the center frequency of the subcarrier which corresponds to the point  3000 . 
     Physical resource blocks for a subcarrier-spacing configuration u are indexed in ascending order from 0 in the frequency domain in a BWP. The index n u   PRB  of the physical resource block with respect to the subcarrier-spacing configuration u satisfies the relationship of n u   CRB =n u   PRB +N start,u   BWP,i . The N start,u   BWP,i  indicates the reference point of BWP with index i. 
     A BWP is defined as a subset of common resource blocks included in the resource grid. The BWP includes N size, u   BWP,i  common resource blocks starting from the reference points N start,u   BWP,i . A BWP for the downlink component carrier is also referred to as a downlink BWP. A BWP for the uplink component carrier is also referred to as an uplink BWP. 
     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. For example, the symbols may correspond to OFDM symbols. For example, the symbols may correspond to resource block units. For example, the symbols may correspond to resource elements. 
     Two antenna ports are said to be QCL (Quasi Co-Located) if the large-scale properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. The large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. 
     Carrier aggregation may be communication using a plurality of aggregated serving cells. Carrier aggregation may be communication using a plurality of aggregated component carriers. Carrier aggregation may be communication using a plurality of aggregated downlink component carriers. Carrier aggregation may be communication using a plurality of aggregated uplink component carriers. 
       FIG.  5    is a schematic block diagram showing a configuration example of the base station device  3  according to an aspect of the present embodiment. As shown in  FIG.  5   , the base station device  3  includes at least a part of or all the wireless transmission/reception unit (physical layer processing unit)  30  and the higher-layer processing unit  34 . The wireless transmission/reception unit  30  includes at least a part of or all the antenna unit  31 , the RF unit  32  (Radio Frequency unit  32 ), and the baseband unit  33 . The higher-layer processing unit  34  includes at least a part of or all the medium access control layer processing unit  35  and the radio resource control (RRC: Radio Resource Control) layer processing unit  36 . 
     The wireless transmission/reception unit  30  includes at least a part of or all a wireless transmission unit  30   a  and a wireless reception unit  30   b.  The configuration of the baseband unit  33  included in the wireless transmission unit  30   a  and the configuration of the baseband unit  33  included in the wireless reception unit  30   b  may be the same or different. The configuration of the RF unit  32  included in the wireless transmission unit  30   a  and the configuration of the RF unit  32  included in the wireless reception unit  30   b  may be the same or different. The configuration of the antenna unit  31  included in the wireless transmission unit  30   a  and the configuration of the antenna unit  31  included in the wireless reception unit  30   b  may be the same or different. 
     The higher-layer processing unit  34  provides downlink data (a transport block) to the wireless transmission/reception unit  30  (or the wireless transmission unit  30   a ). The higher-layer processing unit  34  performs processing of a medium access control (MAC) layer, a packet data convergence protocol layer (PDCP layer), a radio link control layer (RLC layer) and/or an RRC layer. 
     The medium access control layer processing unit  35  included in the higher-layer processing unit  34  performs processing of the MAC layer. 
     The radio resource control layer processing unit  36  included in the higher-layer processing unit  34  performs the process of the RRC layer. The radio resource control layer processing unit  36  manages various configuration information/parameters (RRC parameters) of the terminal device  1 . The radio resource control layer processing unit  36  configures an RRC parameter based on the RRC message received from the terminal device  1 . 
     The wireless transmission/reception unit  30  (or the wireless transmission unit  30   a ) performs processing such as encoding and modulation. The wireless transmission/reception unit  30  (or the wireless transmission unit  30   a ) generates a physical signal by encoding and modulating the downlink data. The wireless transmission/reception unit  30  (or the wireless transmission unit  30   a ) converts OFDM symbols in the physical signal to a baseband signal by conversion to a time-continuous signal. The wireless transmission/reception unit  30  (or the wireless transmission unit  30   a ) transmits the baseband signal (or the physical signal) to the terminal device  1  via radio frequency. The wireless transmission/reception unit  30  (or the wireless transmission unit  30   a ) may arrange the baseband signal (or the physical signal) on a component carrier and transmit the baseband signal (or the physical signal) to the terminal device  1 . 
     The wireless transmission/reception unit  30  (or the wireless reception unit  30   b ) performs processing such as demodulation and decoding. The wireless transmission/reception unit  30  (or the wireless reception unit  30   b ) separates, demodulates and decodes the received physical signal, and provides the decoded information to the higher-layer processing unit  34 . The wireless transmission/reception unit  30  (or the wireless reception unit  30   b ) may perform the channel access procedure prior to the transmission of the physical signal. 
     The RF unit  32  demodulates the physical signal received via the antenna unit  31  into a baseband signal (down convert), and/or removes extra frequency components. The RF unit  32  provides the processed analog signal to the baseband unit  33 . 
     The baseband unit  33  converts an analog signal (signals on radio frequency) input from the RF unit  32  into a digital signal (a baseband signal). The baseband unit  33  separates a portion which corresponds to CP (Cyclic Prefix) from the digital signal. The baseband unit  33  performs Fast Fourier Transformation (FFT) on the digital signal from which the CP has been removed. The baseband unit  33  provides the physical signal in the frequency domain. 
     The baseband unit  33  performs Inverse Fast Fourier Transformation (IFFT) on downlink data to generate an OFDM symbol, adds a CP to the generated OFDM symbol, generates a digital signal (baseband signal), and convert the digital signal into an analog signal. The baseband unit  33  provides the analog signal to the RF unit  32 . 
     The RF unit  32  removes extra frequency components from the analog signal (signals on radio frequency) input from the baseband unit  33 , up-converts the analog signal to a radio frequency, and transmits it via the antenna unit  31 . The RF unit  32  may have a function of controlling transmission power. The RF unit  32  is also referred to as a transmission power control unit. 
     At least one or more serving cells (or one or more component carriers, one or more downlink component carriers, one or more uplink component carriers) may be configured for the terminal device  1 . 
     Each of the serving cells set for the terminal device  1  may be any of PCell (Primary cell), PSCell (Primary SCG cell), and SCell (Secondary Cell). 
     A PCell is a serving cell included in a MCG (Master Cell Group). A PCell is a cell (implemented cell) which performs an initial connection establishment procedure or a connection re-establishment procedure by the terminal device  1 . 
     A PSCell is a serving cell included in a SCG (Secondary Cell Group). A PSCell is a serving cell in which random-access is performed by the terminal device  1  in a reconfiguration procedure with synchronization (Reconfiguration with synchronization). 
     A SCell may be included in either a MCG or a SCG. 
     The serving cell group (cell group) is a designation including at least MCG and SCG. The serving cell group may include one or more serving cells (or one or more component carriers). One or more serving cells (or one or more component carriers) included in the serving cell group may be operated by carrier aggregation. 
     One or more downlink BWPs may be configured for each serving cell (or each downlink component carrier). One or more uplink BWPs may be configured for each serving cell (or each uplink component carrier). 
     Among the one or more downlink BWPs set for the serving cell (or the downlink component carrier), one downlink BWP may be set as an active downlink BWP (or one downlink BWP may be activated). Among the one or more uplink BWPs set for the serving cell (or the uplink component carrier), one uplink BWP may be set as an active uplink BWP (or one uplink BWP may be activated). 
     A PDSCH, a PDCCH, and a CSI-RS may be received in the active downlink BWP. The terminal device  1  may receive the PDSCH, the PDCCH, and the CSI-RS in the active downlink BWP. A PUCCH and a PUSCH may be sent on the active uplink BWP. The terminal device  1  may transmit the PUCCH and the PUSCH in the active uplink BWP. The active downlink BWP and the active uplink BWP are also referred to as active BWP. 
     The PDSCH, the PDCCH, and the CSI-RS may not be received in downlink BWPs (inactive downlink BWPs) other than the active downlink BWP. The terminal device  1  may not receive the PDSCH, the PDCCH, and the CSI-RS in the downlink BWPs which are other than the active downlink BWP. The PUCCH and the PUSCH do not need to be transmitted in uplink BWPs (inactive uplink BWPs) other than the active uplink BWP. The terminal device  1  may not transmit the PUCCH and the PUSCH in the uplink BWPs which is other than the active uplink BWP. The inactive downlink BWP and the inactive uplink BWP are also referred to as inactive BWP. 
     Downlink BWP switching deactivates an active downlink BWP and activates one of inactive downlink BWPs which are other than the active downlink BWP. The downlink BWP switching may be controlled by a BWP field included in a downlink control information. The downlink BWP switching may be controlled based on higher-layer parameters. 
     Uplink BWP switching is used to deactivate an active uplink BWP and activate any inactive uplink BWP which is other than the active uplink BWP. Uplink BWP switching may be controlled by a BWP field included in a downlink control information. The uplink BWP switching may be controlled based on higher-layer parameters. 
     Among the one or more downlink BWPs set for the serving cell, two or more downlink BWPs may not be set as active downlink BWPs. For the serving cell, one downlink BWP may be active at a certain time. 
     Among the one or more uplink BWPs set for the serving cell, two or more uplink BWPs may not be set as active uplink BWPs. For the serving cell, one uplink BWP may be active at a certain time. 
       FIG.  6    is a schematic block diagram showing a configuration example of the terminal device  1  according to an aspect of the present embodiment. As shown in  FIG.  6   , the terminal device  1  includes at least a part of or all the wireless transmission/reception unit (physical layer processing unit)  10  and the higher-layer processing unit  14 . The wireless transmission/reception unit  10  includes at least a part of or all the antenna unit  11 , the RF unit  12 , and the baseband unit  13 . The higher-layer processing unit  14  includes at least a part of or all the medium access control layer processing unit  15  and the radio resource control layer processing unit  16 . 
     The wireless transmission/reception unit  10  includes at least a part of or all a wireless transmission unit  10   a  and a wireless reception unit  10   b.  The configuration of the baseband unit  13  included in the wireless transmission unit  10   a  and the configuration of the baseband unit  13  included in the wireless reception unit  10   b  may be the same or different. The configuration of the RF unit  12  included in the wireless transmission unit  10   a  and the RF unit  12  included in the wireless reception unit  10   b  may be the same or different. The configuration of the antenna unit  11  included in the wireless transmission unit  10   a  and the configuration of the antenna unit  11  included in the wireless reception unit  10   b  may be the same or different. 
     The higher-layer processing unit  14  provides uplink data (a transport block) to the wireless transmission/reception unit  10  (or the wireless transmission unit  10   a ). The higher-layer processing unit  14  performs processing of a MAC layer, a packet data integration protocol layer, a radio link control layer, and/or an RRC layer. 
     The medium access control layer processing unit  15  included in the higher-layer processing unit  14  performs processing of the MAC layer. 
     The radio resource control layer processing unit  16  included in the higher-layer processing unit  14  performs the process of the RRC layer. The radio resource control layer processing unit  16  manages various configuration information/parameters (RRC parameters) of the terminal device  1 . The radio resource control layer processing unit  16  configures RRC parameters based on the RRC message received from the base station device  3 . 
     The wireless transmission/reception unit  10  (or the wireless transmission unit  10   a ) performs processing such as encoding and modulation. The wireless transmission/reception unit  10  (or the wireless transmission unit  10   a ) generates a physical signal by encoding and modulating the uplink data. The wireless transmission/reception unit  10  (or the wireless transmission unit  10   a ) converts OFDM symbols in the physical signal to a baseband signal by conversion to a time-continuous signal. The wireless transmission/reception unit  10  (or the wireless transmission unit  10   a ) transmits the baseband signal (or the physical signal) to the base station device  3  via radio frequency. The wireless transmission/reception unit  10  (or the wireless transmission unit  10   a ) may arrange the baseband signal (or the physical signal) on a BWP (active uplink BWP) and transmit the baseband signal (or the physical signal) to the base station device  3 . 
     The wireless transmission/reception unit  10  (or the wireless reception unit  10   b ) performs processing such as demodulation and decoding. The wireless transmission/reception unit  10  (or the wireless reception unit  10   b ) may receive a physical signal in a BWP (active downlink BWP) of a serving cell. The wireless transmission/reception unit  10  (or the wireless reception unit  10   b ) separates, demodulates and decodes the received physical signal, and provides the decoded information to the higher-layer processing unit  14 . The wireless transmission/reception unit  10  (or the wireless reception unit  10   b ) may perform the channel access procedure prior to the transmission of the physical signal. 
     The RF unit  12  demodulates the physical signal received via the antenna unit  11  into a baseband signal (down convert), and/or removes extra frequency components. The RF unit  12  provides the processed analog signal to the baseband unit  13 . 
     The baseband unit  13  converts an analog signal (signals on radio frequency) input from the RF unit  12  into a digital signal (a baseband signal). The baseband unit  13  separates a portion which corresponds to CP from the digital signal, performs fast Fourier transformation on the digital signal from which the CP has been removed, and provides the physical signal in the frequency domain. 
     The baseband unit  13  performs inverse fast Fourier transformation on uplink data to generate an OFDM symbol, adds a CP to the generated OFDM symbol, generates a digital signal (baseband signal), and convert the digital signal into an analog signal. The baseband unit  13  provides the analog signal to the RF unit  12 . 
     The RF unit  12  removes extra frequency components from the analog signal (signals on radio frequency) input from the baseband unit  13 , up-converts the analog signal to a radio frequency, and transmits it via the antenna unit  11  The RF unit  12  may have a function of controlling transmission power. The RF unit  12  is also referred to as a transmission power control unit. 
     Hereinafter, physical signals (signals) will be described. 
     Physical signal is a generic term for downlink physical channels, downlink physical signals, uplink physical signals, and uplink physical channels. The physical channel is a generic term for downlink physical channels and uplink physical channels. 
     An uplink physical channel may correspond to a set of resource elements that carry information originating from the higher-layer and/or uplink control information. The uplink physical channel may be a physical channel used in an uplink component carrier. The uplink physical channel may be transmitted by the terminal device  1 . The uplink physical channel may be received by the base station device  3 . In the wireless communication system according to one aspect of the present embodiment, at least part or all of PUCCH (Physical Uplink Control CHannel), PUSCH (Physical Uplink Shared CHannel), and PRACH (Physical Random Access CHannel) may be used. 
     A PUCCH may be used to transmit uplink control information (UCI: Uplink Control Information). The PUCCH may be sent to deliver (transmission, convey) uplink control information. The uplink control information may be mapped to (or arranged in) the PUCCH. The terminal device  1  may transmit PUCCH in which uplink control information is arranged. The base station device  3  may receive the PUCCH in which the uplink control information is arranged. 
     Uplink control information (uplink control information bit, uplink control information sequence, uplink control information type) includes at least part or all of channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), and HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement). 
     Channel state information is conveyed by using channel state information bits or a channel state information sequence. Scheduling request is also referred to as a scheduling request bit or a scheduling request sequence. HARQ-ACK information is also referred to as a HARQ-ACK information bit or a HARQ-ACK information sequence. 
     HARQ-ACK information may include HARQ-ACK status which corresponds to a transport block (TB: Transport block, MAC PDU: Medium Access Control Protocol Data Unit, DL-SCH: Downlink-Shared Channel, UL-SCH: Uplink-Shared Channel, PDSCH: Physical Downlink Shared CHannel, PUSCH: Physical Uplink Shared CHannel). The HARQ-ACK status may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to the transport block. The ACK may indicate that the transport block has been successfully decoded. The NACK may indicate that the transport block has not been successfully decoded. The HARQ-ACK information may include a HARQ-ACK codebook that includes one or more HARQ-ACK status (or HARQ-ACK bits). 
     For example, the correspondence between the HARQ-ACK information and the transport block may mean that the HARQ-ACK information and the PDSCH used for transmission of the transport block correspond. 
     HARQ-ACK status may indicate ACK or NACK which correspond to one CBG (Code Block Group) included in the transport block. 
     The scheduling request may at least be used to request PUSCH (or UL-SCH) resources for new transmission. The scheduling request may be used to indicate either a positive SR or a negative SR. The fact that the scheduling request indicates a positive SR is also referred to as “a positive SR is sent”. The positive SR may indicate that the PUSCH (or UL-SCH) resource for initial transmission is requested by the terminal device  1 . A positive SR may indicate that a higher-layer is to trigger a scheduling request. The positive SR may be sent when the higher-layer instructs to send a scheduling request. The fact that the scheduling request bit indicates a negative SR is also referred to as “a negative SR is sent”. A negative SR may indicate that the PUSCH (or UL-SCH) resource for initial transmission is not requested by the terminal device  1 . A negative SR may indicate that the higher-layer does not trigger a scheduling request. A negative SR may be sent if the higher-layer is not instructed to send a scheduling request. 
     The channel state information may include at least part of or all a channel quality indicator (CQI), a precoder matrix indicator (PMI), and a rank indicator (RI). CQI is an indicator related to channel quality (e.g., propagation quality) or physical channel quality, and PMI is an indicator related to a precoder. RI is an indicator related to transmission rank (or the number of transmission layers). 
     Channel state information may be provided at least based on receiving one or more physical signals (e.g., one or more CSI-RSs) used at least for channel measurement. The channel state information may be selected by the terminal device  1  at least based on receiving one or more physical signals used for channel measurement. Channel measurements may include interference measurements. 
     A PUCCH may correspond to a PUCCH format. A PUCCH may be a set of resource elements used to convey a PUCCH format. A PUCCH may include a PUCCH format. A PUCCH format may include UCI. 
     A PUSCH may be used to transmit uplink data (a transport block) and/or uplink control information. A PUSCH may be used to transmit uplink data (a transport block) corresponding to a UL-SCH and/or uplink control information. A PUSCH may be used to convey uplink data (a transport block) and/or uplink control information. A PUSCH may be used to convey uplink data (a transport block) corresponding to a UL-SCH and/or uplink control information. Uplink data (a transport block) may be arranged in a PUSCH. Uplink data (a transport block) corresponding to UL-SCH may be arranged in a PUSCH. Uplink control information may be arranged to a PUSCH. The terminal device  1  may transmit a PUSCH in which uplink data (a transport block) and/or uplink control information is arranged. The base station device  3  may receive a PUSCH in which uplink data (a transport block) and/or uplink control information is arranged. 
     A PRACH may be used to transmit a random-access preamble. The PRACH may be used to convey a random-access preamble. The sequence x u, v  (n) of the PRACH is defined by x u, v  (n)=x u (mod (n+C v , L RA )). The x u  may be a ZC sequence (Zadoff-Chu sequence). The x u  may be defined by x u =exp (−jpui (i+1)/L RA ). The j is an imaginary unit. The p is the circle ratio. The C v  corresponds to cyclic shift of the PRACH. L RA  corresponds to the length of the PRACH. The L RA  may be 839 or 139 or another value. The i is an integer in the range of 0 to L RA −1. The u is a sequence index for the PRACH. The terminal device  1  may transmit the PRACH. The base station device  3  may receive the PRACH. 
     For a given PRACH opportunity, 64 random-access preambles are defined. The random-access preamble is specified (determined, given) at least based on the cyclic shift C v  of the PRACH and the sequence index u for the PRACH. 
     An uplink physical signal may correspond to a set of resource elements. The uplink physical signal may not carry information generated in the higher-layer. The uplink physical signal may be a physical signal used in the uplink component carrier. The terminal device  1  may transmit an uplink physical signal. The base station device  3  may receive the uplink physical signal. In the radio communication system according to one aspect of the present embodiment, at least a part of or all UL DMRS (UpLink Demodulation Reference Signal), SRS (Sounding Reference Signal), UL PTRS (UpLink Phase Tracking Reference Signal) may be used. 
     UL DMRS is a generic name of a DMRS for a PUSCH and a DMRS for a PUCCH. 
     A set of antenna ports of a DMRS for a PUSCH (a DMRS associated with a PUSCH, a DMRS included in a PUSCH, a DMRS which corresponds to a PUSCH) may be given based on a set of antenna ports for the PUSCH. That is, the set of DMRS antenna ports for the PUSCH may be the same as the set of antenna ports for the PUSCH. 
     Transmission of a PUSCH and transmission of a DMRS for the PUSCH may be indicated (or scheduled) by one DCI format. The PUSCH and the DMRS for the PUSCH may be collectively referred to as a PUSCH. Transmission of the PUSCH may be transmission of the PUSCH and the DMRS for the PUSCH. 
     A PUSCH may be estimated from a DMRS for the PUSCH. That is, propagation path of the PUSCH may be estimated from the DMRS for the PUSCH. 
     A set of antenna ports of a DMRS for a PUCCH (a DMRS associated with a PUCCH, a DMRS included in a PUCCH, a DMRS which corresponds to a PUCCH) may be identical to a set of antenna ports for the PUCCH. 
     Transmission of a PUCCH and transmission of a DMRS for the PUCCH may be indicated (or triggered) by one DCI format. The arrangement of the PUCCH in resource elements (resource element mapping) and/or the arrangement of the DMRS in resource elements for the PUCCH may be provided at least by one PUCCH format. The PUCCH and the DMRS for the PUCCH may be collectively referred to as PUCCH. Transmission of the PUCCH may be transmission of the PUCCH and the DMRS for the PUCCH. 
     A PUCCH may be estimated from a DMRS for the PUCCH. That is, propagation path of the PUCCH may be estimated from the DMRS for the PUCCH. 
     A downlink physical channel may correspond to a set of resource elements that carry information originating from the higher-layer and/or downlink control information. The downlink physical channel may be a physical channel used in the 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 the wireless communication system according to one aspect of the present embodiment, at least a part of or all PBCH (Physical Broadcast Channel), PDCCH (Physical Downlink Control Channel), and PDSCH (Physical Downlink Shared Channel) may be used. 
     The PBCH may be used to transmit a MIB (Master Information Block) and/or physical layer control information. The physical layer control information is a kind of downlink control information. The PBCH may be sent to deliver the MIB and/or the physical layer control information. A BCH may be mapped (or corresponding) to the PBCH. The terminal device  1  may receive the PBCH. The base station device  3  may transmit the PBCH. The physical layer control information is also referred to as a PBCH payload and a PBCH payload related to timing. The MIB may include one or more higher-layer parameters. 
     Physical layer control information includes 8 bits. The physical layer control information may include at least part or all of 0A to 0D. The 0A is radio frame information. 
     The 0B is half radio frame information (half system frame information). The 0C is SS/PBCH block index information. The 0D is subcarrier offset information. 
     The radio frame information is used to indicate a radio frame in which the PBCH is transmitted (a radio frame including a slot in which the PBCH is transmitted). The radio frame information is represented by 4 bits. The radio frame information may be represented by 4 bits of a radio frame indicator. The radio frame indicator may include 10 bits. For example, the radio frame indicator may at least be used to identify a radio frame from index 0 to index 1023. 
     The half radio frame information is used to indicate whether the PBCH is transmitted in first five subframes or in second five subframes among radio frames in which the PBCH is transmitted. Here, the half radio frame may be configured to include five subframes. The half radio frame may be configured by five subframes of the first half of ten subframes included in the radio frame. The half radio frame may be configured by five subframes in the second half of ten subframes included in the radio frame. 
     The SS/PBCH block index information is used to indicate an SS/PBCH block index. The SS/PBCH block index information may be represented by 3 bits. The SS/PBCH block index information may consist of 3 bits of an SS/PBCH block index indicator. The SS/PBCH block index indicator may include 6 bits. The SS/PBCH block index indicator may at least be used to identify an SS/PBCH block from index 0 to index 63 (or from index 0 to index 3, from index 0 to index 7, from index 0 to index 9, from index 0 to index 19, etc.). 
     The subcarrier offset information is used to indicate subcarrier offset. The subcarrier offset information may be used to indicate the difference between the first subcarrier in which the PBCH is arranged and the first subcarrier in which the control resource set with index 0 is arranged. 
     A PDCCH may be used to transmit downlink control information (DCI). A PDCCH may be transmitted to deliver downlink control information. Downlink control information may be mapped to a PDCCH. The terminal device  1  may receive a PDCCH in which downlink control information is arranged. The base station device  3  may transmit the PDCCH in which the downlink control information is arranged. 
     Downlink control information may correspond to a DCI format. Downlink control information may be included in a DCI format. Downlink control information may be arranged in each field of a DCI format. 
     DCI format is a generic name for DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1. Uplink DCI format is a generic name of the DCI format 0_0 and the DCI format 0_1. Downlink DCI format is a generic name of the DCI format 1_0 and the DCI format 1_1. 
     The DCI format 0_0 is at least used for scheduling a PUSCH for a cell (or a PUSCH arranged on a cell). The DCI format 0_0 includes at least a part of or all fields  1 A to  1 E. The  1 A is a DCI format identification field (Identifier field for DCI formats). The  1 B is a frequency domain resource assignment field (FDRA field). The  1 C is a time domain resource assignment field (TDRA field). The  1 D is a frequency-hopping flag field. The  1 E is an MCS field (Modulation-and-Coding-Scheme field). 
     The DCI format identification field may indicate whether the DCI format including the DCI format identification field is an uplink DCI format or a downlink DCI format. The DCI format identification field included in the DCI format 0_0 may indicate 0 (or may indicate that the DCI format 0_0 is an uplink DCI format). 
     The frequency domain resource assignment field included in the DCI format 0_0 may be at least used to indicate the assignment (allocation) of frequency resources for a PUSCH. The frequency domain resource assignment field included in the DCI format 0_0 may be at least used to indicate the assignment (allocation) of frequency resources for a PUSCH scheduled by the DCI format 0_0. 
     The time domain resource assignment field included in the DCI format 0_0 may be at least used to indicate the assignment of time resources for a PUSCH. The time domain resource assignment field included in the DCI format 0_0 may be at least used to indicate the assignment of time resources for a PUSCH scheduled by the DCI format 0_0. 
     The frequency-hopping flag field may be at least used to indicate whether frequency-hopping is applied to a PUSCH. The frequency-hopping flag field may be at least used to indicate whether frequency-hopping is applied to a PUSCH scheduled by the DCI format 0_0. 
     The MCS field included in the DCI format 0_0 may be at least used to indicate a modulation scheme for a PUSCH and/or a part of or all a target coding rate for the PUSCH. The MCS field included in the DCI format 0_0 may be at least used to indicate a modulation scheme for a PUSCH scheduled by the DCI format 0_0 and/or a part of or all a target coding rate for the PUSCH. A size of a transport block (TBS: Transport Block Size) of a PUSCH may be given based at least on a target coding rate and a part of or all a modulation scheme for the PUSCH. 
     The DCI format 0_0 may not include fields used for a CSI request. That is, CSI may not be requested by the DCI format 0_0. 
     The DCI format 0_0 may not include a carrier indicator field. An uplink component carrier on which a PUSCH scheduled by the DCI format 0_0 is arranged may be the same as an uplink component carrier on which a PDCCH including the DCI format 0_0 is arranged. 
     The DCI format 0_0 may not include a BWP field. An uplink BWP on which a PUSCH scheduled by the DCI format 0_0 is arranged may be the same as an uplink BWP on which a PDCCH including the DCI format 0_0 is arranged. 
     The DCI format 0_1 is at least used for scheduling of a PUSCH for a cell (or arranged on a cell). The DCI format 0_1 includes at least a part of or all fields  2 A to  2 H. The  2 A is a DCI format identification field. The  2 B is a frequency domain resource assignment field. The  2 C is a time domain resource assignment field. The  2 D is a frequency-hopping flag field. The  2 E is an MCS field. The  2 F is a CSI request field. The  2 G is a BWP field. The  2 H is a carrier indicator field. 
     The DCI format identification field included in the DCI format 0_1 may indicate 0 (or may indicate that the DCI format 0_1 is an uplink DCI format). 
     The frequency domain resource assignment field included in the DCI format 0_1 may be at least used to indicate the assignment of frequency resources for a PUSCH. The frequency domain resource assignment field included in the DCI format 0_1 may be at least used to indicate the assignment of frequency resources for a PUSCH scheduled by the DCI format. 
     The time domain resource assignment field included in the DCI format 0_1 may be at least used to indicate the assignment of time resources for a PUSCH. The time domain resource assignment field included in DCI format 0_1 may be at least used to indicate the assignment of time resources for a PUSCH scheduled by the DCI format 0_1. 
     The frequency-hopping flag field may be at least used to indicate whether frequency-hopping is applied to a PUSCH scheduled by the DCI format 0_1. 
     The MCS field included in the DCI format 0_1 may be at least used to indicate a modulation scheme for a PUSCH and/or a part of or all a target coding rate for the PUSCH. The MCS field included in the DCI format 0_1 may be at least used to indicate a modulation scheme for a PUSCH scheduled by the DCI format and/or part or all of a target coding rate for the PUSCH. 
     When the DCI format 0_1 includes the BWP field, the BWP field may be used to indicate an uplink BWP on which a PUSCH scheduled by the DCI format 0_1 is arranged. When the DCI format 0_1 does not include the BWP field, an uplink BWP on which a PUSCH is arranged may be the active uplink BWP. When a number of uplink BWPs configured in the terminal device 1 in an uplink component carrier is two or more, a number of bits for the BWP field included in the DCI format 0_1 used for scheduling a PUSCH arranged on the uplink component carrier may be one or more. When a number of uplink BWPs configured in the terminal device 1 in an uplink component carrier is one, a number of bits for the BWP field included in the DCI format 0_1 used for scheduling a PUSCH arranged on the uplink component carrier may be zero. 
     The CSI request field is at least used to indicate CSI reporting. 
     If the DCI format 0_1 includes the carrier indicator field, the carrier indicator field may be used to indicate an uplink component carrier (or a serving cell) on which a PUSCH is arranged. When the DCI format 0_1 does not include the carrier indicator field, a serving cell on which a PUSCH is arranged may be the same as the serving cell on which a PDCCH including the DCI format 0_1 used for scheduling of the PUSCH is arranged. When a number of uplink component carriers (or a number of serving cells) configured in the terminal device  1  in a serving cell group is two or more (when uplink carrier aggregation is operated in a serving cell group), or when cross-carrier scheduling is configured for the serving cell group, a number of bits for the carrier indicator field included in the DCI format 0_1 used for scheduling a PUSCH arranged on the serving cell group may be one or more (e.g.,  3 ). When a number of uplink component carriers (or a number of serving cells) configured in the terminal device  1  in a serving cell group is one (or when uplink carrier aggregation is not operated in a serving cell group), or when the cross-carrier scheduling is not configured for the serving cell group, a number of bits for the carrier indicator field included in the DCI format 0_1 used for scheduling of a PUSCH arranged on the serving cell group may be zero. 
     The DCI format 1_0 is at least used for scheduling of a PDSCH for a cell (arranged on a cell). The DCI format 1_0 includes at least a part of or all fields  3 A to  3 F. The  3 A is a DCI format identification field. The  3 B is a frequency domain resource assignment field. The  3 C is a time domain resource assignment field. The  3 D is an MCS field. The  3 E is a PDSCH-to-HARQ-feedback indicator field. The  3 F is a PUCCH resource indicator field. 
     The DCI format identification field included in the DCI format 1_0 may indicate 1 (or may indicate that the DCI format 1_0 is a downlink DCI format). 
     The frequency domain resource assignment field included in the DCI format 1_0 may be at least used to indicate the assignment of frequency resources for a PDSCH. The frequency domain resource assignment field included in the DCI format 1_0 may be at least used to indicate the assignment of frequency resources for a PDSCH scheduled by the DCI format 1_0. 
     The time domain resource assignment field included in the DCI format 1_0 may be at least used to indicate the assignment of time resources for a PDSCH. The time domain resource assignment field included in the DCI format 1_0 may be at least used to indicate the assignment of time resources for a PDSCH scheduled by the DCI format 1_0. 
     The MCS field included in the DCI format 1_0 may be at least used to indicate a modulation scheme for a PDSCH and/or a part of or all a target coding rate for the PDSCH. The MCS field included in the DCI format 1_0 may be at least used to indicate a modulation scheme for a PDSCH scheduled by the DCI format 1_0 and/or a part of or all a target coding rate for the PDSCH. A size of a transport block (TBS: Transport Block Size) of a PDSCH may be given based at least on a target coding rate and a part of or all a modulation scheme for the PDSCH. 
     The PDSCH-to-HARQ-feedback timing indicator field may be at least used to indicate the offset (K1) from a slot in which the last OFDM symbol of a PDSCH scheduled by the DCI format 1_0 is included to another slot in which the first OFDM symbol of a PUCCH triggered by the DCI format 1_0 is included. 
     The PUCCH resource indicator field may be a field indicating an index of any one or more PUCCH resources included in the PUCCH resource set for a PUCCH transmission. The PUCCH resource set may include one or more PUCCH resources. The PUCCH resource indicator field may trigger PUCCH transmission with a PUCCH resource indicated at least based on the PUCCH resource indicator field. 
     The DCI format 1_0 may not include the carrier indicator field. A downlink component carrier on which a PDSCH scheduled by the DCI format 1_0 is arranged may be the same as a downlink component carrier on which a PDCCH including the DCI format 1_0 is arranged. 
     The DCI format 1_0 may not include the BWP field. A downlink BWP on which a PDSCH scheduled by a DCI format 1_0 is arranged may be the same as a downlink BWP on which a PDCCH including the DCI format 1_0 is arranged. 
     The DCI format 1_1 is at least used for scheduling of a PDSCH for a cell (or arranged on a cell). The DCI format 1_1 includes at least a part of or all fields  4 A to  4 H. The  4 A is a DCI format identification field. The  4 B is a frequency domain resource assignment field. The  4 C is a time domain resource assignment field. The  4 D is an MCS field. The  4 E is a PDSCH-to-HARQ-feedback indicator field. The  4 F is a PUCCH resource indicator field. The  4 G is a BWP field. The  4 H is a carrier indicator field. 
     The DCI format identification field included in the DCI format 1_1 may indicate 1 (or may indicate that the DCI format 1_1 is a downlink DCI format). 
     The frequency domain resource assignment field included in the DCI format 1_1 may be at least used to indicate the assignment of frequency resources for a PDSCH. The frequency domain resource assignment field included in the DCI format 1_0 may be at least used to indicate the assignment of frequency resources for a PDSCH scheduled by the DCI format 1_1. 
     The time domain resource assignment field included in the DCI format 1_1 may be at least used to indicate the assignment of time resources for a PDSCH. The time domain resource assignment field included in the DCI format 1_1 may be at least used to indicate the assignment of time resources for a PDSCH scheduled by the DCI format 1_1. 
     The MCS field included in the DCI format 1_1 may be at least used to indicate a modulation scheme for a PDSCH and/or a part of or all a target coding rate for the PDSCH. The MCS field included in the DCI format 1_1 may be at least used to indicate a modulation scheme for a PDSCH scheduled by the DCI format 1_1 and/or a part of or all a target coding rate for the PDSCH. 
     When the DCI format 1_1 includes a PDSCH-to-HARQ-feedback timing indicator field, the PDSCH-to-HARQ-feedback timing indicator field indicates an offset (K1) from a slot including the last OFDM symbol of a PDSCH scheduled by the DCI format 1_1 to another slot including the first OFDM symbol of a PUCCH triggered by the DCI format U. When the DCI format 1_1 does not include the PDSCH-to-HARQ-feedback timing indicator field, an offset from a slot in which the last OFDM symbol of a PDSCH scheduled by the DCI format 1_1 is included to another slot in which the first OFDM symbol of a PUCCH triggered by the DCI format 1_1 is identified by a higher-layer parameter. 
     When the DCI format 1_1 includes the BWP field, the BWP field may be used to indicate a downlink BWP on which a PDSCH scheduled by the DCI format 1_1 is arranged. When the DCI format 1_1 does not include the BWP field, a downlink BWP on which a PDSCH is arranged may be the active downlink BWP. When a number of downlink BWPs configured in the terminal device  1  in a downlink component carrier is two or more, a number of bits for the BWP field included in the DCI format 1_1 used for scheduling a PDSCH arranged on the downlink component carrier may be one or more. When a number of downlink BWPs configured in the terminal device  1  in a downlink component carrier is one, a number of bits for the BWP field included in the DCI format 1_1 used for scheduling a PDSCH arranged on the downlink component carrier may be zero. 
     If the DCI format 1_1 includes the carrier indicator field, the carrier indicator field may be used to indicate a downlink component carrier (or a serving cell) on which a PDSCH is arranged. When the DCI format 1_1 does not include the carrier indicator field, a downlink component carrier (or a serving cell) on which a PDSCH is arranged may be the same as a downlink component carrier (or a serving cell) on which a PDCCH including the DCI format 1_1 used for scheduling of the PDSCH is arranged. When a number of downlink component carriers (or a number of serving cells) configured in the terminal device  1  in a serving cell group is two or more (when downlink carrier aggregation is operated in a serving cell group), or when cross-carrier scheduling is configured for the serving cell group, a number of bits for the carrier indicator field included in the DCI format 1_1 used for scheduling a PDSCH arranged on the serving cell group may be one or more (e.g., 3). When a number of downlink component carriers (or a number of serving cells) configured in the terminal device  1  in a serving cell group is one (or when downlink carrier aggregation is not operated in a serving cell group), or when the cross-carrier scheduling is not configured for the serving cell group, a number of bits for the carrier indicator field included in the DCI format 1_1 used for scheduling of a PDSCH arranged on the serving cell group may be zero. 
     A PDSCH may be used to transmit one or more transport blocks. A PDSCH may be used to transmit one or more transport blocks which corresponds to a DL-SCH. A PDSCH may be used to convey one or more transport blocks. A PDSCH may be used to convey one or more transport blocks which corresponds to a DL-SCH. One or more transport blocks may be arranged in a PDSCH. One or more transport blocks which corresponds to a DL-SCH may be arranged in a PDSCH. The base station device  3  may transmit a PDSCH. The terminal device  1  may receive the PDSCH. 
     Downlink physical signals may correspond to a set of resource elements. The downlink physical signals may not carry the information generated in the higher-layer. The downlink physical signals may be physical signals used in the downlink component carrier. A downlink physical signal may be transmitted by the base station device  3 . The downlink physical signal may be transmitted by the terminal device  1 . In the wireless communication system according to one aspect of the present embodiment, at least a part of or all an SS (Synchronization signal), DL DMRS (DownLink DeModulation Reference Signal), CSI-RS (Channel State Information-Reference Signal), and DL PTRS (DownLink Phase Tracking Reference Signal) may be used. 
     The synchronization signal may be used at least for the terminal device  1  to synchronize in the frequency domain and/or time domain for downlink. The synchronization signal is a generic name of PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal). 
       FIG.  7    is a diagram showing a configuration example of an SS/PBCH block according to an aspect of the present embodiment. In  FIG.  7   , the horizontal axis indicates time domain (OFDM symbol index l sym ), and the vertical axis indicates frequency domain. The shaded blocks indicate a set of resource elements for a PSS. The blocks of grid lines indicate a set of resource elements for an SSS. Also, the blocks in the horizontal line indicate a set of resource elements for a PBCH and a set of resource elements for a DMRS for the PBCH (DMRS related to the PBCH, DMRS included in the PBCH, DMRS which corresponds to the PBCH). 
     As shown in  FIG.  7   , the SS/PBCH block includes a PSS, an SSS, and a PBCH. The SS/PBCH block includes  4  consecutive OFDM symbols. The SS/PBCH block includes 240 subcarriers. The PSS is allocated to the 57th to 183rd subcarriers in the first OFDM symbol. The SSS is allocated to the 57th to 183rd subcarriers in the third OFDM symbol. The first to 56th subcarriers of the first OFDM symbol may be set to zero. The 184th to 240th subcarriers of the first OFDM symbol may be set to zero. The 49th to 56th subcarriers of the third OFDM symbol may be set to zero. The 184th to 192nd subcarriers of the third OFDM symbol may be set to zero. In the first to 240th subcarriers of the second OFDM symbol, the PBCH is allocated to subcarriers in which the DMRS for the PBCH is not allocated. In the first to 48th subcarriers of the third OFDM symbol, the PBCH is allocated to subcarriers in which the DMRS for the PBCH is not allocated. In the 193rd to 240th subcarriers of the third OFDM symbol, the PBCH is allocated to subcarriers in which the DMRS for the PBCH is not allocated. In the first to 240th subcarriers of the 4th OFDM symbol, the PBCH is allocated to subcarriers in which the DMRS for the PBCH is not allocated. 
     The antenna ports of a PSS, an SSS, a PBCH, and a DMRS for the PBCH in an SS/PBCH block may be identical. 
     A PBCH may be estimated from a DMRS for the PBCH. For the DM-RS for the PBCH, the channel over which a symbol for the PBCH on an antenna port is conveyed can be inferred from the channel over which another symbol for the DM-RS on the antenna port is conveyed only if the two symbols are within a SS/PBCH block transmitted within the same slot, and with the same SS/PBCH block index. 
     DL DMRS is a generic name of DMRS for a PBCH, DMRS for a PDSCH, and DMRS for a PDCCH. 
     A set of antenna ports for a DMRS for a PDSCH (a DMRS associated with a PDSCH, a DMRS included in a PDSCH, a DMRS which corresponds to a PDSCH) may be given based on the set of antenna ports for the PDSCH. The set of antenna ports for the DMRS for the PDSCH may be the same as the set of antenna ports for the PDSCH. 
     Transmission of a PDSCH and transmission of a DMRS for the PDSCH may be indicated (or scheduled) by one DCI format. The PDSCH and the DMRS for the PDSCH may be collectively referred to as PDSCH. Transmitting a PDSCH may be transmitting a PDSCH and a DMRS for the PDSCH. 
     A PDSCH may be estimated from a DMRS for the PDSCH. For a DM-RS associated with a PDSCH, the channel over which a symbol for the PDSCH on one antenna port is conveyed can be inferred from the channel over which another symbol for the DM-RS on the antenna port is conveyed only if the two symbols are within the same resource as the scheduled PDSCH, in the same slot, and in the same PRG (Precoding Resource Group). 
     Antenna ports for a DMRS for a PDCCH (a DMRS associated with a PDCCH, a DMRS included in a PDCCH, a DMRS which corresponds to a PDCCH) may be the same as an antenna port for the PDCCH. 
     A PDCCH may be estimated from a DMRS for the PDCCH. For a DM-RS associated with a PDCCH, the channel over which a symbol for the PDCCH on one antenna port is conveyed can be inferred from the channel over which another symbol for the DM-RS on the same antenna port is conveyed only if the two symbols are within resources for which the UE may assume the same precoding being used (i.e. within resources in a REG bundle). 
     A BCH (Broadcast CHannel), a UL-SCH (Uplink-Shared CHannel) and a DL-SCH (Downlink-Shared CHannel) are transport channels. A channel used in the MAC layer is called a transport channel. A unit of transport channel used in the MAC layer is also called transport block (TB) or MAC PDU (Protocol Data Unit). In the MAC layer, control of HARQ (Hybrid Automatic Repeat request) is performed for each transport block. The transport block is a unit of data delivered by the MAC layer to the physical layer. In the physical layer, transport blocks are mapped to codewords and modulation processing is performed for each codeword. 
     One UL-SCH and one DL-SCH may be provided for each serving cell. BCH may be given to PCell. BCH may not be given to PSCell and SCell. 
     A BCCH (Broadcast Control CHannel), a CCCH (Common Control CHannel), and a DCCH (Dedicated Control CHannel) are logical channels. The BCCH is a channel of the RRC layer used to deliver MIB or system information. The CCCH may be used to transmit a common RRC message in a plurality of terminal devices  1 . The CCCH may be used for the terminal device  1  which is not connected by RRC. The DCCH may be used at least to transmit a dedicated RRC message to the terminal device  1 . The DCCH may be used for the terminal device  1  that is in RRC-connected mode. 
     The RRC message includes one or more RRC parameters (information elements). For example, the RRC message may include a MIB. For example, the RRC message may include system information (SIB: System Information Block, MIB). SIB is a generic name for various type of SIBS (e.g., SIB1, SIB2). For example, the RRC message may include a message which corresponds to a CCCH. For example, the RRC message may include a message which corresponds to a DCCH. RRC message is a general term for common RRC message and dedicated RRC message. 
     The BCCH in the logical channel may be mapped to the BCH or the DL-SCH in the transport channel. The CCCH in the logical channel may be mapped to the DL-SCH or the UL-SCH in the transport channel. The DCCH in the logical channel may be mapped to the DL-SCH or the UL-SCH in the transport channel. 
     The UL-SCH in the transport channel may be mapped to a PUSCH in the physical channel. The DL-SCH in the transport channel may be mapped to a PDSCH in the physical channel. The BCH in the transport channel may be mapped to a PBCH in the physical channel. 
     A higher-layer parameter is a parameter included in an RRC message or a MAC CE (Medium Access Control Control Element). The higher-layer parameter is a generic name of information included in a MIB, system information, a message which corresponds to CCCH, a message which corresponds to DCCH, and a MAC CE. 
     The procedure performed by the terminal device  1  includes at least a part of or all the following  5 A to  5 C. The  5 A is cell search. The  5 B is random-access. The  5 C is data communication. 
     The cell search is a procedure used by the terminal device  1  to synchronize with a cell in the time domain and/or the frequency domain and to detect a physical cell identity. The terminal device  1  may detect the physical cell ID by performing synchronization of time domain and/or frequency domain with a cell by the cell search. 
     A sequence of a PSS is given based at least on a physical cell ID. A sequence of an SSS is given based at least on the physical cell M. 
     An SS/PBCH block candidate indicates a resource for which transmission of the SS/PBCH block may exist. An SS/PBCH block may be transmitted at a resource indicated as the SS/PBCH block candidate. The base station device  3  may transmit an SS/PBCH block at an SS/PBCH block candidate. The terminal device  1  may receive (detect) the SS/PBCH block at the SS/PBCH block candidate. 
     A set of SS/PBCH block candidates in a half radio frame is also referred to as an SS-burst-set. The SS-burst-set is also referred to as a transmission window, a SS transmission window, or a DRS transmission window (Discovery Reference Signal transmission window). The SS-burst-set is a generic name that includes at least a first SS-burst-set and a second SS-burst-set. 
     The base station device  3  transmits SS/PBCH blocks of one or more indexes at a predetermined cycle. The terminal device  1  may detect an SS/PBCH block of at least one of the SS/PBCH blocks of the one or more indexes. The terminal device  1  may attempt to decode the PBCH included in the SS/PBCH block. 
     The random-access is a procedure including at least a part of or all message 1, message 2, message 3, and message 4. 
     The message 1 is a procedure in which the terminal device  1  transmits a PRACH. The terminal device  1  transmits the PRACH in one PRACH occasion selected from among one or more PRACH occasions based on at least the index of the SS/PBCH block candidate detected based on the cell search. 
     PRACH occasion configuration may include at least part or all of a PRACH configuration period (PCF) T PCF , number of PRACH occasions N PCF   RO, t  included in the time domain of a PRACH configuration period, the number of PRACH occasions included in the frequency domain N RO, f , number N RO   preamble  of random-access preambles per PRACH occasion allocated for random-access, number of preambles allocated per index of SS/PBCH block candidate for contention based random-access (CBRA), N SSB   preamble, CBRA , and number of PRACH occasions N SSB   RO  allocated per index of SS/PBCH block candidate for contention based random-access. 
     At least based on the PRACH occasion configuration, at least part or all of time domain resources and frequency domain resources for a PRACH occasion. 
     An association between an index of an SS/PBCH block candidate that corresponds to an SS/PBCH block detected by the terminal device  1  and a PRACH occasion may be provided at least based on first bitmap information indicating one or more indexes of SS/PBCH block candidates used for transmission of actually-transmitted SS/PBCH blocks. The terminal device  1  may determine an association between the index of SS/PBCH block candidate including an SS/PBCH block detected by the terminal device  1  and PRACH occasions. For example, the first element of the first bitmap information may correspond to an SS/PBCH block candidate with index 0. For example, the second element of the first bitmap information may correspond to an SS/PBCH block candidate with index 1. For example, the L SSB −1 th  element of the first bitmap information may correspond to an SS/PBCH block candidate with index L SSB −1. The L SSB  is number of SS/PBCH block candidates included in an SS-burst-set. 
       FIG.  8    is a diagram illustrating an example of setting of a PRACH resource according to an aspect of the present embodiment. In  FIG.  8   , the PRACH configuration period TPCF is 40 ms, the number of PRACH occasions included in the time domain of a PRACH configuration period N PCF   RO, t i s 1, and the number of PRACH occasions included in the frequency domain N RO, f  is 2. 
     For example, the first bitmap information (ssb-PositionInBurst) indicating the indexes of SS/PBCH block candidates used for transmission of SS/PBCH blocks is {1, 1, 0, 1, 0, 1, 0, 0} . The indexes of the SS/PBCH block candidates used for transmission of the SS/PBCH blocks is also called as actually transmitted SS/PBCH block or actually-transmitted SS/PBCH block candidate. 
       FIG.  9    is an example of an association between indexes of SS/PBCH block candidates and PRACH occasions (SS-RO association) in a case that N RO   preamble =64, N SSB   preamble,CBRA =64, N SSB   RO =1, and the first bitmap is set to {1,1,0,1,0,1,1,0} according to an aspect of the embodiment. In  FIG.  9   , it is assumed that PRACH occasion configuration is the same as in  FIG.  8   . In  FIG.  9   , the SS/PBCH block candidate with index 0 may correspond to the PRACH occasion (RO# 0 ) with index 0, the SS/PBCH block candidate with index 1 may correspond to the PRACH occasion (RO# 1 ) with index 1, and the SS/PBCH block candidate with index 3 may correspond to the PRACH occasion (RO# 2 ) with index 2, the SS/PBCH block candidate with index 5 may correspond to the PRACH occasion (RO# 3 ) with index 3, and the SS/PBCH block candidate with index 6 may correspond to the PRACH opportunity of index 4 (RO# 4 ). In.  FIG.  9   , a PRACH association period (PRACH AP) TAP is 120 ms including PRACH occasions from index 0 to index 4. In  FIG.  9   , PRACH association pattern period (PRACH APP) T APP  is 160 ms. In  FIG.  9   , the PRACH association pattern period includes one PRACH association period. 
       FIG.  10    is an example of an association between indexes of SS/PBCH block candidates and PRACH occasions (SS-RO association) in a case that N RO   preamble =64, N SSB   preamble,CBRA =64, N SSB   RO =1, and the first bitmap is set to {1,1,0,1,0,1,0,0} according to an aspect of the embodiment. In  FIG.  10   , it is assumed that PRACH occasion configuration is the same as in  FIG.  8   . In  FIG.  10   , the SS/PBCH block candidate with index 0 may correspond to the PRACH occasion (RO# 0 ) with index 0 and the PRACH occasion (RO# 4 ) with index 4, the SS/PBCH block candidate with index 1 may correspond to the PRACH occasion (RO# 1 ) with index 1 and the PRACH occasion (RO# 5 ) with index 5, the SS/PBCH block candidate with index 3 may correspond to the PRACH occasion (RO# 2 ) with index 2 and the PRACH occasion (RO# 6 ) with index 6, the SS/PBCH block candidate with index 5 may correspond to the PRACH occasion (RO# 3 ) with index 3 and the PRACH occasion (RO# 7 ) with index  7 . In  FIG.  10   , a PRACH association period (PRACH AP) T AP  is 80 ms including PRACH occasions from index 0 to index 3. In  FIG.  9   , PRACH association pattern period (PRACH APP) T APP  is 160 ms. In  FIG.  9   , the PRACH association pattern period includes two PRACH association periods. 
     The smallest index of “the SS/PBCH block candidates actually used for transmission of SS/PBCH blocks” indicated by the first bitmap information may correspond to the first PRACH occasion (the PRACH occasion with index 0). The n-th index of “the SS/PBCH block candidates actually used for transmission of SS/PBCH blocks” indicated by the first bitmap information may correspond to the n-th PRACH occasion (the PRACH occasion with index n−1). 
     The index of the PRACH occasion is set to the PRACH occasions included in the PRACH association pattern period with priority given to the frequency axis (Frequency-first time-second). 
     In  FIG.  9   , PRACH occasions which corresponds to at least one actually-transmitted SS/PBCH block candidates are the PRACH occasion with index 0 to 4, and the PRACH configuration periods including at least one PRACH occasion which corresponds to at least one actually-transmitted SS/PBCH block candidates are first to third PRACH configuration periods. In  FIG.  10   , PRACH occasions which corresponds to at least one actually-transmitted SS/PBCH block candidates are the PRACH occasion with index 0 to 3, and the PRACH configuration periods including at least one PRACH occasion which corresponds to at least one actually-transmitted SS/PBCH block candidates are first to second PRACH configuration periods. 
     When the maximum integer k satisfying T APP &gt;k*T AP  is 2 or more, one PRACH association pattern period is configured to include k PRACH association periods. In  FIG.  10   , since the largest integer k satisfying T APP &gt;k*T AP  is 2, the first PRACH association period includes the two PRACH configuration periods from the beginning, and the second PRACH association period includes the third to fourth PRACH configuration periods. 
     The terminal device  1  may transmit a PRACH with a random-access preamble in a PRACH occasion selected from PRACH occasions which corresponds to the index of the detected SS/PBCH block candidate. The base station device  3  may receive the PRACH in the selected PRACH occasion. 
     The message  2  is a procedure in which the terminal device  1  attempts to detect a DCI format 1_0 with CRC (Cyclic Redundancy Check) scrambled by an RA-RNTI (Random Access-Radio Network Temporary Identifier). The terminal device  1  may attempt to detect the DCI format 1_0 in a search-space-set. 
     The message  3  is a procedure for transmitting a PUSCH scheduled by a random-access response grant included in the DCI format 1_0 detected in the message 2 procedure. The random-access response grant is indicated by the MAC CE included in the PDSCH scheduled by the DCI format 1_0. 
     The PUSCH scheduled based on the random-access response grant is either a message 3 PUSCH or a PUSCH. The message 3 PUSCH contains a contention resolution identifier MAC CE. The contention resolution ID MAC CE includes a contention resolution ID. 
     Retransmission of the message 3 PUSCH is scheduled by DCI format 0_0 with CRC scrambled by a TC-RNTI (Temporary Cell-Radio Network Temporary Identifier). 
     The message 4 is a procedure that attempts to detect a DCI format 1_0 with CRC scrambled by either a C-RNTI (Cell-Radio Network Temporary Identifier) or a TC-RNTI. The terminal device  1  receives a PDSCH scheduled based on the DCI format 1_0. The PDSCH may include a collision resolution ID. 
     Data communication is a generic term for downlink communication and uplink communication. 
     In data communication, the terminal device  1  attempts to detect a PDCCH (attempts to monitor a PDCCH, monitors a PDCCH). in a resource identified at least based on one or all of a control resource set and a search-space-set. It&#39;s also called as “the terminal device  1  attempts to detect a PDCCH in a control resource set”, “the terminal device  1  attempts to detect a PDCCH in a search-space-set”, “the terminal device  1  attempts to detect a PDCCH candidate in a control resource set”, “the terminal device  1  attempts to detect a PDCCH candidate in a search-space-set”, “the terminal device  1  attempts to detect a DCI format in a control resource set”, or “the terminal device  1  attempts to detect a DCI format in a search-space-set”. Monitoring a PDCCH may be equivalent as monitoring a DCI format in the PDCCH. 
     The control resource set is a set of resources configured by a number of resource blocks and a predetermined number of OFDM symbols in a slot. 
     The set of resources for the control resource set may be indicated by higher-layer parameters. The number of OFDM symbols included in the control resource set may be indicated by higher-layer parameters. 
     A PDCCH may be also called as a PDCCH candidate. 
     A search-space-set is defined as a set of PDCCH candidates. A search-space-set may be a Common Search Space (CSS) set or a UE-specific Search Space (USS) set. 
     The CSS set is a generic name 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, and a type-3 PDCCH common search-space-set. The USS set may be also called as UE-specific PDCCH search-space-set. 
     The type-0 PDCCH common search-space-set may be used as a common search-space-set with index 0. The type-0 PDCCH common search-space-set may be an common search-space-set with index 0. 
     A search-space-set is associated with (included in, corresponding to) a control resource set. The index of the control resource set associated with the search-space-set may be indicated by higher-layer parameters. 
     For a search-space-set, a part of or all  6 A to  6 C may be indicated at least by higher-layer parameters. The  6 A is PDCCH monitoring period. The  6 B is PDCCH monitoring pattern within a slot. The  6 C is PDCCH monitoring offset. 
     A monitoring occasion of a search-space-set may correspond to one or more OFDM symbols in which the first OFDM symbol of the control resource set associated with the search-space-set is allocated. A monitoring occasion of a search-space-set may correspond to resources identified by the first OFDM symbol of the control resource set associated with the search-space-set. A monitoring occasion of a search-space-set is given based at least on a part of or all PDCCH monitoring periodicity, PDCCH monitoring pattern within a slot, and PDCCH monitoring offset. 
       FIG.  11    is a diagram showing an example of the monitoring occasion of the search-space-set according to an aspect of the present embodiment. In  FIG.  11   , the search-space-set  91  and the search-space-set  92  are sets in the primary cell  301 , the search-space-set  93  is a set in the secondary cell  302 , and the search-space-set  94  is a set in the secondary cell  303 . 
     In  FIG.  11   , the block indicated by the grid line indicates the search-space-set  91 , the block indicated by the upper right diagonal line indicates the search-space-set  92 , the block indicated by the upper left diagonal line indicates the search-space-set  93 , and the block indicated by the horizontal line indicates the search-space-set  94 . 
     In  FIG.  11   , the PDCCH monitoring periodicity for the search-space-set  91  is set to 1 slot, the PDCCH monitoring offset for the search-space-set  91  is set to 0 slot, and the PDCCH monitoring pattern for the search-space-set  91  is [1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0]. That is, the monitoring occasion of the search-space-set  91  corresponds to the first OFDM symbol (OFDM symbol # 0 ) and the eighth OFDM symbol (OFDM symbol # 7 ) in each of the slots. 
     In  FIG.  11   , the PDCCH monitoring periodicity for the search-space-set  92  is set to 2 slots, the PDCCH monitoring offset for the search-space-set  92  is set to 0 slots, and the PDCCH monitoring pattern for the search-space-set  92  is [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. That is, the monitoring occasion of the search-space-set  92  corresponds to the leading OFDM symbol (OFDM symbol # 0 ) in each of the even slots. 
     In  FIG.  11   , the PDCCH monitoring periodicity for the search-space-set  93  is set to 2 slots, the PDCCH monitoring offset for the search-space-set  93  is set to 0 slots, and the PDCCH monitoring pattern for the search-space-set  93  is [0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0]. That is, the monitoring occasion of the search-space-set  93  corresponds to the eighth OFDM symbol (OFDM symbol # 8 ) in each of the even slots. 
     In  FIG.  11   , the PDCCH monitoring periodicity for the search-space-set  94  is set to 2 slots, the PDCCH monitoring offset for the search-space-set  94  is set to 1 slot, and the PDCCH monitoring pattern for the search-space-set  94  is [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. That is, the monitoring occasion of the search-space-set  94  corresponds to the leading OFDM symbol (OFDM symbol # 0 ) in each of the odd slots. 
     The type-0 PDCCH common search-space-set may be at least used for a DCI format with a cyclic redundancy check (CRC) sequence scrambled by an SI-RNTI (System Information-Radio Network Temporary Identifier). 
     The type-0a PDCCH common search-space-set may be used at least for a DCI format with a cyclic redundancy check sequence scrambled by an SI-RNTI. 
     The type-1 PDCCH common search-space-set may be used at least for a DCI format with a CRC sequence scrambled by an RA-RNTI (Random Access-Radio Network Temporary Identifier) or a CRC sequence scrambled by a TC-RNTI (Temporary Cell-Radio Network Temporary Identifier). 
     The type-2 PDCCH common search-space-set may be used for a DCI format with a CRC sequence scrambled by P-RNTI (Paging-Radio Network Temporary Identifier). 
     The type-3 PDCCH common search-space-set may be used for a DCI format with a CRC sequence scrambled by a C-RNTI (Cell-Radio Network Temporary Identifier). 
     The UE-specific search-space-set may be used at least for a DCI format with a CRC sequence scrambled by a C-RNTI. 
     In downlink communication, the terminal device  1  may detect a downlink DCI format. The detected downlink DCI format is at least used for resource assignment for a PDSCH. The detected downlink DCI format is also referred to as downlink assignment. The terminal device  1  attempts to receive the PDSCH. Based on a PUCCH resource indicated based on the detected downlink DCI format, an HARQ-ACK corresponding to the PDSCH (HARQ-ACK corresponding to a transport block included in the PDSCH) may be reported to the base station device  3 . 
     In uplink communication, the terminal device  1  may detect an uplink DCI format. The detected uplink DCI format is at least used for resource assignment for a PUSCH. The detected uplink DCI format is also referred to as uplink grant. The terminal device  1  transmits the PUSCH. 
     The base station device  3  and the terminal device  1  may perform a channel access procedure in the serving cell c. The base station device  3  and the terminal device  1  may perform transmission of a transmission wave in the serving cell c. For example, the serving cell c may be a serving cell configured in an Unlicensed band. The transmission wave is a physical signal transmitted from the base station device  3  to the medium or a physical signal transmitted from the terminal device  1  to the medium. 
     The base station device  3  and the terminal device  1  may perform a channel access procedure on the carrier f of the serving cell c. The base station device  3  and the terminal device  1  may perform transmission of a transmission wave on the carrier f of the serving cell c. The carrier f is a carrier included in the serving cell c. The carrier f may be configured by a set of resource blocks given based on higher-layer parameters. 
     The base station device  3  and the terminal device  1  may perform a channel access procedure on the carrier f of the serving cell c. The base station device  3  and the terminal device  1  may perform transmission of a transmission wave on the BWP b of the carrier f of the serving cell c. The BWP b is a subset of resource blocks included in the carrier f. 
     The base station device  3  and the terminal device  1  may perform the channel access procedure in the BWP b of the carrier f of the serving cell c. The base station device  3  and the terminal device  1  may perform transmission of a transmission wave in the carrier f of the serving cell c. Carrying out transmission of the transmission wave on the carrier f of the serving cell c may be transmission of the transmission wave on any set of the BWPs included in the carrier f of the serving cell c. 
     The base station device  3  and the terminal device  1  may perform the channel access procedure in the BWP b of the carrier f of the serving cell c. The base station device  3  and the terminal device  1  may transmit a transmission wave in the BWP b of the carrier f of the serving cell c. 
     The channel access procedure may include at least one or both of a first sensing and a counting procedure. The first channel access procedure may include a first measurement. The first channel access procedure may not include the counting procedure. The second channel access procedure may at least include both the first measurement and the counting procedure. The channel access procedure is a designation including a part of or all the first channel access procedure and the second channel access procedure. 
     After the first channel access procedure is performed, a transmission wave including at least an SS/PBCH block may be transmitted. After the first channel access procedure is performed, the gNB may transmit at least a part of or all an SS/PBCH block, a PDSCH including broadcast information, PDCCH including DCI format used for scheduling of the PDSCH, and a CSI-RS. After the second channel access procedure is performed, a transmission wave including at least a PDSCH including information which is other than the broadcast information may be transmitted. The PDSCH including the broadcast information may include at least a part of or all a PDSCH including system information, a PDSCH including paging information, and a PDSCH used for random-access (e.g., message 2 and/or message 4). 
     A transmission wave including at least a part of or all an SS/PBCH block, a PDSCH including broadcast information, a PDCCH including a DCI format used for scheduling the PDSCH, and a CSI-RS is also referred to as DRS (Discovery Reference Signal). The DRS may be a set of physical signals transmitted after the first channel access procedure. 
     If the period of the DRS is less than or equal to a predetermined length and the duty cycle of the DRS is less than or equal to a predetermined value, a transmission wave including the DRS may be transmitted after the first channel access procedure is performed. When the duration of the DRS exceeds the predetermined length, a transmission wave including the DRS may be transmitted after the second channel access procedure is performed. When the duty cycle of the DRS exceeds the predetermined value, a transmission wave including the DRS may be transmitted after the second channel access procedure is performed. For example, the predetermined length may be 1 ms. For example, the predetermined value may be 1/20. 
     Transmission of a transmission wave after the channel access procedure is performed may be transmission of the transmission wave based on the channel access procedure. 
     The first measurement may be that the medium is detected to be idle during one or more LBT slot durations of the defer duration. Here, LBT (Listen-Before-Talk) may be a procedure in which whether the medium is idle or busy is given based on carrier sense. The carrier sense may be to perform energy detection in the medium. For example, the “busy” may be a state in which the amount of energy detected by the carrier sense is equal to or larger than a predetermined threshold. The “idle” may be a state in which the amount of energy detected by the carrier sense is smaller than the predetermined threshold. Also, it may be the “idle” that the amount of energy detected by the carrier sense is equal to the predetermined threshold. Also, it may be the “busy” that the amount of energy detected by the carrier sense is equal to the predetermined threshold. A result of carrier sense (“busy” or “idle”) may be called a LBT outcome. 
     An LBT slot duration is a time unit of LBT. For each LBT slot duration, whether the medium is idle or busy may be provided. For example, the LBT slot duration may be 9 microseconds. 
     The postponement duration T d  may include at least a duration T f  and one or more LBT slot durations. For example, the duration T f  may be 16 microseconds. 
       FIG.  12    is a diagram illustrating an example of the counting procedure according to an aspect of the present embodiment. The counting procedure includes at least a part of or all steps A 1  to A 6 . Step A 1  includes an operation of setting the value of the counter N to N init . Here, the N init  is a value which is randomly (or pseudo-randomly) selected from integer values in the range of 0 to CWp. CWp is a contention window size (CWS) for the channel access priority class p. 
     In Step A 2 , whether the value of the counter N is zero or not is determined. Step A 2  includes an operation of completing (or terminating) the channel access procedure when the counter N is zero. Step A 2  includes an operation of proceeding to step A 3  when the counter N is not zero. In  FIG.  12   , the “true” corresponds to the fact that the evaluation formula is true in the step including the operation of determining the evaluation formula. Also, the “false” corresponds to the fact that the evaluation formula is false in the step including the operation of determining the evaluation formula. In Step A 2 , the evaluation formula corresponds to the counter N=0. 
     For example, Step A 3  may include the step of decrementing the value of the counter N. Decrementing the value of the counter N may be to reduce the value of the counter N by one. That is, to decrement the value of the counter N may be to set the value of the counter N to N−1. 
     For example, Step A 3  may include the step of decrementing the value of the counter N when N&gt;0. Also, Step A 3  may include the step of decrementing the value of the counter N when the base station device  3  or the terminal device  1  selects to decrement the counter N. Step A 3  may also include a step of decrementing the value of the counter N when N&gt;0 and the base station device  3  selects to decrement the counter N. Step A 3  may also include a step of decrementing the value of the counter N when N&gt;0 and the terminal device  1  selects to decrement the counter N. 
     For example, Step A 4  may include an operation of performing carrier sense of the medium in LBT slot duration d and an operation of proceeding to step A 2  if the LBT slot duration d is idle. Further, Step A 4  may include an operation of proceeding to Step A 2  when it is determined by carrier sense that the LBT slot duration d is idle. Further, Step A 4  may include an operation of performing carrier sense in LBT slot duration d and an operation of proceeding to step A 5  when LBT slot duration d is busy. Further, Step A 4  may include an operation of proceeding to Step A 5  when it is determined by carrier sense that the LBT slot duration d is busy. Here, the LBT slot duration d may be the next LBT slot duration of the LBT slot duration already carrier-sensed in the counting procedure. In Step A 4 , the evaluation formula may correspond to the LBT slot duration d being idle. 
     In Step A 5 , the medium is idle until it is detected that the medium is busy in a certain LBT slot duration included in the delay-duration, or in all LBT slot durations included in the delay-duration. It includes an operation of performing carrier sense until “idle” is detected. 
     Step A 6  includes an operation of proceeding to Step A 5  when it is detected that the medium is busy in a certain LBT slot duration included in the delay-duration. Step A 6  includes an operation that proceeds to step A 2  when it is detected that the medium is idle in all LBT slot durations included in the delay-duration. In step A 6 , the evaluation formula may correspond to the medium being idle in the certain LBT slot duration. 
     CW min, p  indicates the minimum value of the range of possible values of the contention window size CWp for the channel access priority class p. CW max, p  indicates the maximum value of the range of possible values of the contention window size CWp for the channel access priority class p. 
     When a transmission wave including at least a physical channel (for example, PDSCH) associated with the channel access priority class p is transmitted, CWp is managed by the base station device  3  or the terminal device  1 . The base station device  3  or the terminal device  1  adjusts the CWp before Step A 1  of the counting procedure. 
     In a component carrier, NR-U (New Radio-Unlicensed) may be applied. In a serving cell, NR-U may be applied. Applying NR-U in a component carrier (or a serving cell) may at least include a technology (framework, configuration) including part or all of the following elements B 1  to B 6 . The B 1  is that a second SS-burst-set is configured on the component carrier (or the serving cell). The B 2  is that the base station device  3  transmits a second SS/PBCH block on the component carrier (or the serving cell). The B 3  is that the terminal device  1  receives the second SS/PBCH block on the component carrier (or the serving cell). The B 4  is that the base station device  3  transmits the PDCCH in the second type-0 PDCCH common search-space-set in the component carrier (or the serving cell). The B 5  is that the terminal device  1  receives the PDCCH in the second type-0 PDCCH common search-space-set in the component carrier (or the serving cell). The B 6  is that a higher-layer parameter (for example, a field included in the MIB) associated with NR-U indicates a first value (for example, 1). 
     In a component carrier, NR-U may not be applied. In a serving cell, NR-U may not be applied. The fact that NR-U is not applied in a component carrier (or a serving cell) may at least include a technology (framework, configuration) including part or all of the following elements C 1  to C 6 . The C 1  is that a first SS-burst-set is configured on the component carrier (or the serving cell). The C 2  is that the base station device  3  transmits the first SS/PBCH block on the component carrier (or the serving cell). The C 3  is that the terminal device  1  receives the first SS/PBCH block on the component carrier (or the serving cell). The C 4  is that the base station device  3  transmits a PDCCH in the first type-0 PDCCH common search-space-set in the component carrier (or the serving cell). The C 5  is that the terminal device  1  receives the PDCCH in the first type-0 PDCCH common search-space-set in the component carrier (or the serving cell). The C 6  is that a higher-layer parameter (for example, a field included in MIB) associated with NR-U indicates a value (for example, 0) which is different from the first value. 
     A component carrier may be configured to a licensed-band. A serving cell may be configured to a licensed-band. Here, configuration of a certain component carrier (or a certain serving cell) being in the licensed-band may include at least a part of or all configuration 1 to configuration 3 below. The configuration 1 may be that a higher-layer parameter indicating that a component carrier (or a serving cell) operates in a licensed-band is given. The configuration 1 may be that a higher-layer parameter indicating that a component carrier (or a serving cell) operates in an unlicensed-band is not given. The configuration 2 may be that a component carrier (or a serving cell) is configured to operate in a licensed-band. The configuration 2 may be that a component carrier (or a serving cell) is not configured to operate in an unlicensed-band. The configuration 3 may be that a component carrier (or a serving cell) is included in the licensed-band. The configuration 3 may be that a component carrier (or a serving cell) is not included in the unlicensed-band. 
     The licensed-band may be a frequency band for which a wireless station license is required for a terminal device  1  operating (expected to operate) in the licensed-band. The licensed-band may be a frequency band in which only a terminal device  1  manufactured by a business person (a business entity, a business, an organization, a company) who holds a wireless station license is permitted to operate. The licensed-band may be such that no channel access procedure prior to the transmission of a physical signal is required. 
     The unlicensed-band may be a frequency band for which a wireless station license is not required for a terminal device  1  operating in the unlicensed-band. The unlicensed-band may be a frequency band such that a terminal device  1  manufactured by a business person who holds a wireless station license and/or a business person who does not hold a wireless station license is permitted to operate. The unlicensed-band may be a frequency band requiring a channel access procedure prior to transmission of a physical signal. 
     Whether NR-U is applied to a component carrier (or a serving cell) or not may be determined by at least whether the component carrier (or the serving cell) is configured in an unlicensed-band or not. For example, in a case that the component carrier (or the serving cell) is configured in an unlicensed-band, the NR-U may be applied. For example, in a case that the component carrier (or the serving cell) is configured in a licensed-band, the NR-U may not be applied. 
     Whether NR-U is applied to a component carrier (or a serving cell) or not may be determined by at least whether the component carrier (or the serving cell) is configured in a frequency band in which the NR-U can be operated or not. For example, in a case that the component carrier (or the serving cell) is configured in the frequency band, the NR-U may be applied. For example, in a case that the component carrier (or the serving cell) is configured in the frequency band, the NR-U may not be applied. 
     Whether NR-U is applied to a component carrier (or a serving cell) or not may be determined based on information contained in system information. For example, when information indicating whether or not to apply NR-U is included in the MIB, and the information indicates that the NR-U is applied, NR-U may be applied to the serving cell corresponding to that MIB. On the other hand, if the information does not indicate that NR-U is applied, NR-U may not be applied to the serving cell to which the MIB corresponds. 
     A component carrier may be configured to an unlicensed-band. A serving cell may be configured to an unlicensed-band. Here, configuration of a certain component carrier (or a certain serving cell) being in the unlicensed-band may include at least a part of or all configuration 4 to configuration 6 below. The configuration 4 may be that a higher-layer parameter indicating that a component carrier (or a serving cell) operates in an unlicensed-band is given. The configuration 5 may be that a component carrier (or a serving cell) is configured to operate in an unlicensed-band. The configuration 5 may be that a component carrier (or a serving cell) is configured to operate in an unlicensed-band. The configuration 6 may be that a component carrier (or a serving cell) is included in the unlicensed-band. The configuration 6 may be that a component carrier (or a serving cell) is included in the unlicensed-band. 
     Which of the first SS/PBCH block or the second SS/PBCH block is received in the component carrier by the terminal device  1  depends on at least a part of or all whether NR-U is applied in the component carrier and whether the component carrier is configured in an unlicensed-band. 
     An LBT subband may include one or more contiguous resource blocks. An LBT subband may be called an RB set. Hereinafter, terminologies of “LBT subband” and “RB set” are used interchangeably. One or more downlink LBT subbands may be indicated by an RRC parameter intraCellGuardBandDL-r16. One or more downlink LBT subbands may be indicated by an RRC parameter intraCellGuardBandDL-r16. A frequency bandwidth may be an LBT subband. A frequency bandwidth may include one or more LBT subbands. 
     A resource indication value (RIV) indicated by a FDRA field included in a PDCCH is used to determine a starting resource block and a length of contiguously resource blocks within a frequency bandwidth. The determined resource block(s) is used for resource allocation of PDSCH or PUSCH scheduled by the PDCCH. 
     Terminal device  1  may be scheduled by a PDCCH with multiple resource allocations for PUSCHs where each PUSCH carries a same transport block. For example, terminal device  1  may be scheduled with a single time domain resource allocation and multiple frequency domain resource allocations on different LBT subbands (RB sets). A frequency resource allocation for each PUSCH of the multiple PUSCHs is determined at least based on a RIV indicated by a FDRA field included in the PDCCH. Terminal device  1  may select one or more frequency domain resource allocations from the scheduled multiple frequency domain resource allocations for PUSCH transmission carrying the transport block. Selection of the one or more frequency domain resource allocations may be at least based on LBT outcomes for the LBT subbands. 
     Terminal device  1  may detect a PDCCH including a DCI format. The DCI format is used for scheduling a first PUSCH and a second PUSCH. Terminal device  1  may transmit the first PUSCH and/or the second PUSCH. Terminal device  1  may be indicated with a RIV by a frequency domain resource allocation (FDRA) field included in the DCI format. The RIV is used to determine a starting resource block and a length of contiguously resource blocks within a frequency bandwidth. A first frequency domain resource allocation within a first frequency bandwidth for the first PUSCH and a second frequency domain resource allocation within a second frequency bandwidth for the second PUSCH may be determined at least based on the RIV. A size of the FDRA field is determined by a size of a predetermined frequency bandwidth from a set of frequency bandwidths which at least includes the first frequency bandwidth and the second frequency bandwidth. The predetermined frequency bandwidth may be a frequency bandwidth with a lowest frequency in the set of the frequency bandwidths, or a frequency bandwidth with a highest frequency in the set of the frequency bandwidths. 
     Terminal device  1  may detect a PDCCH including a DCI format. The DCI format is used for scheduling a first PUSCH and a second PUSCH. Terminal device  1  may transmit the first PUSCH and/or the second PUSCH. Terminal device  1  may be indicated with a RIV by a frequency domain resource allocation (FDRA) field included in the DCI format. The RIV is used to determine a starting resource block and a length of contiguously resource blocks within a frequency bandwidth. A first frequency domain resource allocation for the first PUSCH may be determined at least based on the starting resource block and the length of contiguously resource blocks and a first frequency offset. A second frequency domain resource allocation for the second PUSCH is determined at least based on the starting resource block and the length of contiguously resource blocks and a second frequency offset that is different from the first frequency offset. 
     Terminal device  1  may detect a PDCCH including a DCI format. The DCI format is used for scheduling a first PUSCH and a second PUSCH. Terminal device  1  may transmit the first PUSCH and/or the second PUSCH. Terminal device  1  may be indicated with a RIV by a frequency domain resource allocation (FDRA) field included in the DCI format. The RIV is used to determine a starting resource block and a length of contiguously resource blocks across multiple frequency bandwidths. A set of resource blocks may be determined by the RIV. A first frequency domain resource allocation for the first PUSCH may be determined at least based on an intersection of the set of resource blocks and a first frequency bandwidth. A second frequency domain resource allocation for the second PUSCH may be determined at least based on an intersection of the set of resource blocks and a second frequency bandwidth that is different from the first frequency bandwidth. 
       FIG.  13    is a diagram illustrating an example of one or more PUSCH transmissions based on multiple scheduled frequency domain resource allocations. For transmission of a transport block, terminal device  1  is indicated with a time domain resource allocation and multiple frequency domain resource allocations. For example, LBT subband 1301 , LBT subband 1302 , and LBT subband 1303  are configured for PUSCH transmission. Terminal device  1  may determine a frequency domain resource allocation for each LBT subband. During LBT phase 1321 , terminal device  1  performs channel access procedure (carrier sense) to determine idle LBT subband (s). For example, if LBT subband 1301  is determined to be idle and if LBT subband 1301  and LBT subband 1303  are determined to be busy, terminal device  1  may transmit a PUSCH carrying the transport block using the frequency domain resource allocation determined for LBT subband 1302  and the indicated time domain resource allocation. For example, if LBT subband 1302  and LBT subband 1303  are determined to be idle and if LBT subband 1303  is determined to be busy, terminal device  1  may transmit a PUSCH carrying the transport block using the frequency domain resource allocation determined for LBT subband 1302  and/or LBT subband 1303  and the indicated time domain resource allocation. 
       FIG.  14    is a diagram illustrating an example of determination of multiple frequency domain resource allocations. Terminal device  1  detects a PDCCH scheduling PUSCH 1431 , PUSCH 1432 , and PUSCH 1433 . PUSCH 1431  may be PUSCH 1311 . PUSCH 1432  may be PUSCH 1312 . PUSCH 1433  may be PUSCH 1313 . RIV 1401  is indicated by a FDRA field included in the PDCCH. Based on RIV 1401 , a starting resource block (S) and a length of contiguously resource blocks (L) are determined for resource allocation within a frequency bandwidth. For example, RIV 1401  indicates a starting resource block with index  2  (S=2) and a length of 5 contiguously resource blocks (L=5) within frequency bandwidth 1402 . That is, resource blocks from resource block 1403  with index 2 to resource block 1404  are determined for resource allocation. Frequency bandwidth 1402  may be predetermined. RIV 1401  may be computed at least based on frequency bandwidth 1402 . Terminal device  1  is configured and/or indicated with LBT subband  1421 , LBT subband 1422 , and LBT subband 1423  for PUSCH transmission. Within LBT subband 1421 , terminal device  1  determines frequency domain resource allocation 1411  at least based on RIV 1401 . For example, terminal device  1  determines frequency domain resource allocation 1411  with S=2 and L=5 computed based on RIV 1401 . For example, terminal device  1  determines frequency domain resource allocation 1411  as resource blocks from the third resource block (index 2) to the seventh resource block (index 6) within LBT subband 1421 . Within LBT subband 1422 , terminal device  1  determines frequency domain resource allocation 1412  at least based on RIV 1401 . For example, terminal device  1  determines frequency domain resource allocation 1412  with S=2 and L=5 computed based on RIV 1401 . For example, terminal device  1  determines frequency domain resource allocation 1412  as resource blocks from the third resource block (index  2 ) to the seventh resource block (index  6 ) within LBT subband 1422 . Within LBT subband 1423 , terminal device  1  determines frequency domain resource allocation 1413  at least based on RIV 1401 . For example, terminal device  1  determines frequency domain resource allocation 1413  with S=2 and L=5 computed based on RIV 1401 . For example, terminal device  1  determines frequency domain resource allocation 1413  as resource blocks from the third resource block (index 2) to the seventh resource block (index 6) within LBT subband 1423 . At least based on LBT outcome on LBT subbands, terminal device  1  may transmit one or more PUSCHs on corresponding one or more LBT subbands with the determined frequency domain resource allocation(s). For example, when LBT outcome for LBT subband 1421  is busy and LBT outcome for LBT subband 1422  is idle and LBT outcome for LBT subband 1423  is idle, terminal device  1  may transmit PUSCH  1432  on LBT subband 1422  with the determined frequency domain resource allocation 1412 . Terminal device  1  may transmit PUSCH 1433  on LBT subband 1423  with the determined frequency domain resource allocation 1413 . Terminal device  1  may not transmit PUSCH 1431  on LBT subband 1421 . Frequency bandwidth 1402  may be a frequency bandwidth from a set of frequency bandwidths which at least includes LBT subband 1421 , LBT subband 1422 , and LBT subband 1423 . Frequency bandwidth 1402  may be a frequency bandwidth with a lowest frequency in the set of the frequency bandwidths. For example, frequency bandwidth 1402  is LBT subband 1421 . Frequency bandwidth 1402  may be a frequency bandwidth with a lowest frequency in the set of the frequency bandwidths. For example, frequency bandwidth 1402  is LBT subband 1423 . A length of (a number of resource blocks included in) frequency bandwidth 1402  may be different from the LBT subband. Frequency bandwidth 1402  may be an initial uplink BWP. Frequency bandwidth 1402  may be an initial downlink BWP. 
     A size (bitwidth) of the FDRA field may be determined at lease based on frequency bandwidth 1402 . Suppose that frequency bandwidth 1402  includes NRB band  resources blocks. For example, the size of the FDRA field may be determined at least based on N RB   band . For example, the size of the FDRA field may be determined at least based on ceil(log2(N RB   band  (N RB   band +1)/2)). For example, the size of the FDRA field may be given by ceil(log2(N RB   band  (N RB   band +1)/2)). 
       FIG.  15    is a diagram illustrating an example of determination of multiple frequency domain resource allocations. Terminal device  1  detects a PDCCH scheduling PUSCH 1541 , PUSCH 1542 , and PUSCH 1543 . PUSCH 1541  may be PUSCH 1311 . PUSCH 1542  may be PUSCH 1312 . PUSCH 1543  may be PUSCH 1313 . RIV 1501  is indicated by a FDRA field included in the PDCCH. Based on RIV 1501 , a starting resource block (S) and a length of contiguously resource blocks (L) are determined for resource allocation. Terminal device  1  is indicated or configured with offset 1531  whose value is O1, offset1532 whose value is O2, and offset 1533  whose value is O3. Terminal device  1  may determine frequency domain resource allocation 1511  at least based on RIV 1501  and offset 1531 . For example, terminal device  1  may determine a starting resource block with index of S+O1 and a length L of contiguously allocated resource blocks as frequency domain resource allocation for PUSCH 1541  transmission. Terminal device  1  may determine frequency domain resource allocation 1512  at least based on RIV 1501  and offset 1532 . For example, terminal device  1  may determine a starting resource block with index of S+O2 and a length L of contiguously resource blocks as frequency domain resource allocation for PUSCH 1542  transmission. Terminal device  1  may determine frequency domain resource allocation 1513  at least based on RIV 1501  and offset 1533 . For example, terminal device  1  may determine a starting resource block with index of S+O3 and a length L of contiguously allocated resource blocks as frequency domain resource allocation for PUSCH 1543  transmission. At least based on LBT outcome on LBT subbands, terminal device  1  may transmit one or more PUSCHs on corresponding one or more LBT subbands with the determined frequency domain resource allocation(s). For example, when LBT outcome for LBT subband 1521  is busy and LBT outcome for LBT subband 1522  is idle and LBT outcome for LBT subband 1523  is idle, terminal device  1  may transmit PUSCH 1542  on LBT subband 1522  with the determined frequency domain resource allocation 1512 . Terminal device  1  may transmit PUSCH 1543  on LBT subband 1523  with the determined frequency domain resource allocation 1513 . Terminal device  1  may not transmit PUSCH  1541  on LBT subband 1521 . 
       FIG.  16    is a diagram illustrating an example of determination of multiple frequency domain resource allocations. Terminal device  1  detects a PDCCH scheduling PUSCH 1631 , PUSCH 1632 , and PUSCH 1633 . PUSCH 1631  may be PUSCH 1311 . PUSCH 1632  may be PUSCH 1312 . PUSCH 1633  may be PUSCH 1313 . RIV 1601  is indicated by a FDRA field included in the PDCCH. Based on RIV 1601 , a set of resource blocks with a starting resource block (S) and a length of contiguously resource blocks (L) are determined for resource allocation. Terminal device  1  may determine frequency domain resource allocation 1611  based on an intersection between RIV 1601  and LBT subband 1621 . For example, frequency domain resource allocation 1611  is last two resource blocks of LBT subband 1621 . Terminal device  1  may determine frequency domain resource allocation 1612  based on an intersection between RIV 1601  and LBT subband 1622 . For example, frequency domain resource allocation 1612  is all resource blocks of LBT subband 1622 . Terminal device  1  may determine frequency domain resource allocation 1613  based on an intersection between RIV 1601  and LBT subband 1623 . For example, frequency domain resource allocation 1613  is first three resource blocks of LBT subband 1623 . At least based on LBT outcome on LBT subbands, terminal device  1  may transmit one or more PUSCHs on corresponding one or more LBT subbands with the determined frequency domain resource allocation(s). For example, when LBT outcome for LBT subband 1621  is busy and LBT outcome for LBT subband 1622  is idle and LBT outcome for LBT subband 1623  is idle, terminal device  1  may transmit PUSCH  1632  on LBT subband 1622  with the determined frequency domain resource allocation 1612 . Terminal device  1  may transmit PUSCH  1633  on LBT subband 1623  with the determined frequency domain resource allocation 1613 . Terminal device  1  may not transmit PUSCH  1631  on LBT subband 1621 . 
     For example, size of the FDRA field may be determined at lease based on active bandwidth part which includes one or multiple LBT subbands. Suppose that the active bandwidth part includes N RB   BWP  resources blocks. For example, the size of the FDRA field may be determined at least based on N RB   BWP . For example, the size of the FDRA field may be determined at least based on ceil(log2(N RB   BWP  (N RB   BWP +1)/2)). For example, the size of the FDRA field may be given by ceil(log2(N RB   BWP  (N RB   BWP +1)/2)). 
     For example, in a case that RIV 1601  indicates a set of resource blocks included in a LBT subband (for example, LBT subband 1621 ), single PUSCH may be allocated by RIV 1601 . 
     A PDCCH may be used for dynamic switching of multiple PUSCH scheduling and single PUSCH scheduling. The dynamic switching may be triggered by a DCI field included in the PDCCH. For example, in case that multiple LBT subbands are configured and/or indicated and the DCI field indicates a first value, terminal device  1  may determine multiple frequency domain resource allocations for multiple PUSCHs scheduling. For example, in case that multiple LBT subbands are configured and/or indicated and the DCI field indicates a second value, terminal device  1  may determine one frequency domain resource allocation for a single PUSCH scheduling. The first value may be different from the second value. For example, in case that only a single LBT subbands is configured and/or indicated, terminal device  1  may determine one frequency domain resource allocation for a single PUSCH scheduling. 
     For example, the DCI field indicating the first value or the second value may be a field indicating a priority value for HARQ-ACK information. Terminal device  1  may multiplex the HARQ-ACK information with the same priority value. Terminal device  1  may not multiplex the HARQ-ACK information with different priority value. 
     TBS (Transport Block Size) of a transport block may be defined as a size of the transport block. TBS of a transport block multiplexed on a PDSCH may be given based at least on a part or all of a target coding rate and a modulation scheme for the PDSCH. TBS of the transport block multiplexed on the PDSCH may be determined based at least on a number of PRBs allocated to the PDSCH. TBS of a transport block multiplexed on a PUSCH may be given based at least on a part or all of a target coding rate and a modulation scheme for the PUSCH. TBS of the transport block multiplexed on the PUSCH may be determined based at least on a number of PRBs allocated to the PUSCH. 
     Terminal device  1  may detect a PDCCH including a DCI format that is used for scheduling a first PUSCH and a second PUSCH. For example, the first PUSCH may be PUSCH  1311 , and the second PUSCH may be PUSCH  1312 . Terminal device  1  may transmit the first PUSCH and/or the second PUSCH. A number N PRB   1  of PRBs is allocated to the first PUSCH and a number N PRB   2  of PRBs which may be different from N PRB   1  is allocated to the second PUSCH at least based on a FDRA field included in the DCI format. A size of a transport block (TBS) may be determined at least based on a baseline number N PRB   baseline  of PRBs. N PRB   baseline  may be determined at least based on N PRB   1  and N PRB   2 . For example, N PRB   baseline  is given by the minimum value between N PRB   1  and N PRB   2 . For example, N PRB   baseline  is given by the maximum value between N PRB   1  and N PRB   2 . For example, N PRB   baseline  is determined at least based on an average value of N PRB   1  and N PRB   2 . For example, N PRB   baseline  is determined at least based on N RB   1 . For example, N PRB   baseline  is determined at least based on N PRB   2 . The transport block may be included in the first PUSCH and the second PUSCH. For example, Terminal device  1  may transmit the first PUSCH including the transport block and/or transmit the second PUSCH including the transport block. Base station device  3  may schedule the first PUSCH and the second PUSCH by the DCI format included in the PDCCH. Base station device  3  may allocate frequency domain resource to the first PUSCH and the second PUSCH via the FDRA field included in the DCI format. Base station device  3  may expect to detect the first PUSCH and/or the second PUSCH carrying the same transport block. Scheduling multiple PUSCHs carrying a same transport block can improve reliability and reduce latency of PUSCH transmission. When base station device  3  detects multiple PUSCHs with the same transport block, soft combining can further improve the reliability. Terminal device  1  may reduce computing resources for transmission of the first PUSCH and/or the second PUSCH by determining the same size of the transport block. 
     N PRB   baseline  consecutive PRBs from the lowest frequency end or to the highest frequency end of the PRBs allocated to the first PUSCH may be used for transmission of the first PUSCH. N PRB   baseline  consecutive PRBs from the lowest frequency end or to the highest frequency end of the PRBs allocated to the second PUSCH may be used for transmission of the second PUSCH. Using a portion of allocated PRBs can reduce generated interference. For example, no interference is generated on the frequency bandwidth corresponding to the unused PRBs. 
     All the PRBs allocated to the first PUSCH may be used for transmission of the first PUSCH. All the PRBs allocated to the second PUSCH may be used for transmission of the second PUSCH. Using all allocated PRBs can lower coding rate and thus improve decoding performance, resulting in superior reliability. 
       FIG.  17    is a diagram illustrating an example of determining a size of a transport block for a first PUSCH and a second PUSCH. The first PUSCH may be PUSCH 1311 . The second PUSCH may be PUSCH 1312 . Terminal device  1  detects a PDCCH including a DCI format that is used for scheduling the first PUSCH and the second PUSCH. A FDRA field indicating a RIV or a bitmap is included in the DCI format. By applying the FDRA field indication to LBT subband 1711 , frequency resource allocation 1721  including N PRB   1  PRBs is allocated for transmission of the first PUSCH. By applying the FDRA field indication to LBT subband 1712 , frequency resource allocation 1722  including N PRB   2  PRBs is allocated for transmission of the second PUSCH. Here, it is supposed that N PRB   1 &gt;N PRB   2 . Terminal device  1  may determine a size of a transport block (TBS) at least based on a baseline number N PRB   baseline  of PRBs. N PRB   baseline may be determined at least based on N   PRB   1  and N PRB   2 . For example, N PRB   baseline  is given by the minimum value between N PRB   1  and N PRB   2 . That is, N PRB   baseline  is given by N PRB   2  in  FIG.  17   . For example, N PRB   baseline  is given by the maximum value between N PRB   1  and N PRB   2 . That is, N PRB   baseline  is given by N PRB   1  in  FIG.  17   . For example, N PRB   baseline  is determined at least based on an average value of N PRB   1  and N PRB   2 . That is, N PRB   baseline  is given by floor((N PRB   1 +N PRB   2 )/2) or ceil((N PRB   1 +N PRB   2 )/2) in  FIG.  17   . For example, N PRB   baseline  is determined at least based on N PRB   1 . For example, N PRB   baseline  is determined at least based on N PRB   2 . Terminal device  1  may use all the allocated PRBs for PUSCH transmission. For example, terminal device  1  may use N PRB   1  allocated PRBs for transmission of the first PUSCH. For example, terminal device  1  may use N PRB   2  allocated PRBs for transmission of the second PUSCH. Terminal device  1  may transmit the transport block via the first PUSCH and/or the second PUSCH. That is, the first PUSCH and/or the second PUSCH deliver the same transport block (data) to base station device  3 . Terminal device  1  may transmit the first PUSCH and/or the second PUSCH depending on LBT outcome on LBT subband 1711  and LBT subband 1712 . 
     Terminal device  1  may detect a PDCCH including a DCI format that is used for scheduling a first set of PUSCHs including UX PUSCHs and a second set of PUSCHs including UY PUSCHs. Terminal device  1  may transmit one or more PUSCHs from the first set of PUSCHs and the second set of PUSCHs. A number N PRB   1  of PRBs is allocated to each PUSCH of the first PUSCH and a number N PRB   2  of PRBs is allocated to each PUSCH of the second PUSCH at least based on a FDRA field included in the PDCCH. A size of a transport block may be determined at least based on a baseline number N PRB   baseline  of PRBs. In a case that UX&gt;UY, N PRB   baseline  is given by N PRB   1 . In a case that UX&lt;UY, N PRB   baseline  is given by N PRB   2 . The transport block may be included in one or more PUSCHs from the first set PUSCHs and the second set of PUSCHs. Base station device  3  may schedule the multiple PUSCHs by the DCI format included in the PDCCH. Base station device  3  may allocate frequency domain resource to the multiple PUSCHs via the FDRA field included in the DCI format. Base station device  3  may expect to detect one or more PUSCHs carrying the same transport block. Scheduling multiple PUSCHs carrying a same transport block can improve reliability and reduce latency of PUSCH transmission. When base station device  3  detects multiple PUSCHs with the same transport block, soft combining can further improve the reliability. Terminal device  1  may reduce computing resources for transmission of the first PUSCH and/or the second PUSCH by determining the same size of the transport block. 
       FIG.  18    is a diagram illustrating an example of determining a size of transport block for a first set of PUSCHs and a second set of PUSCHs. Terminal device  1  detects a PDCCH including a DCI format that is used for scheduling PUSCH 1801 , PUSCH 1802 , and PUSCH 1803 . A FDRA field indicating a RIV or a bitmap is included in the DCI format. By applying the FDRA field indication to LBT subband 1811 , frequency resource allocation 1821  including N PRB   1  PRBs is allocated for transmission of PUSCH 1801 . By applying the FDRA field indication to LBT subband 1812 , frequency resource allocation 1822  including N PRB   2  PRBs is allocated for transmission of PUSCH 1802 . By applying the FDRA field indication to LBT subband 1813 , frequency resource allocation 1823  including N PRB   2  PRBs is allocated for transmission of PUSCH 1803 . PUSCH set 1831  includes UX=1 PUSCH (PUSCH 1801  allocated with N PRB   1  PRBs). PUSCH set 1832  includes UY=2 PUSCHs (PUSCH 1802  and PUSCH 1803  allocated with N PRB   2  PRBs). PUSCH 18011  may be PUSCH 1311 . PUSCH 1802  may be PUSCH 1312 . PUSCH 1803  may be PUSCH 1313 . Terminal device  1  may determine a size of a transport block (TBS) at least based on a baseline number N PRB   baseline  of PRBs. N PRB   baseline  may be determined at least based on UX and UY. For example, N PRB   baseline  may be given by N PRB   2  corresponding to the maximum value of UX and UY (that is, UY in  FIG.  18   ). Terminal device  1  may use all the allocated PRBs for PUSCH transmission. For example, terminal device  1  may use N PRB   1  allocated PRBs for transmission of PUSCH 1801 . For example, terminal device  1  may use N PRB   2  allocated PRBs for transmission of PUSCH 1802 . For example, terminal device  1  may use N PRB   2  allocated PRBs for transmission of PUSCH 1803 . Terminal device  1  may transmit the transport block via PUSCH 1801 , PUSCH 1802  and PUSCH 1803 . That is, PUSCH 1801 , PUSCH 1802 , and PUSCH 1803  deliver the same transport block (data) to base station device  3 . Terminal device  1  may transmit one or more PUSCHs from PUSCH 1801 , PUSCH 1802 , and PUSCH 1803  depending on LBT outcome on LBT subband 1811 , LBT subband 1812 , and LBT subband 1813 . 
     Terminal device  1  may detect a PDCCH including a DCI format that is used for scheduling a first PUSCH and a second PUSCH. The first PUSCH may be PUSCH 1311 . The second PUSCH may be PUSCH 1312 . Terminal device  1  may transmit the first PUSCH and/or the second PUSCH. A number N PRB   1  of PRBs is allocated to the first PUSCH and a number N PRB   2  of PRBs is allocated to the second PUSCH at least based on a FDRA field included in the PDCCH. Terminal device  1  may expect that N PRB    1 =N PRB   2 . Base station device  3  may schedule the first PUSCH and the second PUSCH by the DCI format included in the PDCCH. Base station device  3  may allocate frequency domain resource to the first PUSCH and the second PUSCH via the FDRA field included in the DCI format. Base station device  3  may allocate a same number of PRBs to the first PUSCH and the second PUSCH. Base station device  3  may expect to detect the first PUSCH and/or the second PUSCH carrying the same transport block. Scheduling multiple PUSCHs carrying a same transport block can improve reliability and reduce latency of PUSCH transmission. When base station device  3  detects multiple PUSCHs with the same transport block, soft combining can further improve the reliability. Terminal device  1  may reduce computing resources for transmission of the first PUSCH and/or the second PUSCH by determining the same size of the transport block. 
     Each of a program running on the base station device  3  and the terminal device  1  according to an aspect of the present invention may be a program that controls a Central Processing. Unit (CPU) and the like, such that the program causes a computer to operate in such a manner as to realize the functions of the above-described embodiment according to the present invention. The information handled in these devices is transitorily stored in a Random-Access-Memory (RAM) while being processed. Thereafter, the information is stored in various types of Read-Only-Memory (ROM) such as a Flash ROM and a Hard-Disk-Drive (HDD), and when necessary, is read by the CPU to be modified or rewritten. 
     Note that the terminal device  1  and the base station device  3  according to the above-described embodiment may be partially achieved by a computer. In this case, this configuration may be realized by recording a program for realizing such control functions on a computer-readable recording medium and causing a computer system to read the program recorded on the recording medium for execution. 
     Note that it is assumed that the “computer system” mentioned here refers to a computer system built into the terminal device  1  or the base station device  3 , and the computer system includes an OS and hardware components such as a peripheral device. Furthermore, the “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, and the like, and a storage device built into the computer system such as a hard disk. 
     Moreover, the “computer-readable recording medium” may include a medium that dynamically retains a program for a short period of time, such as a communication line that is used to transmit the program over a network such as the Internet or over a communication line such as a telephone line, and may also include a medium that retains a program for a fixed period of time, such as a volatile memory within the computer system for functioning as a server or a client in such a case. Furthermore, the program may be configured to realize some of the functions described above, and also may be configured to be capable of realizing the functions described above in combination with a program already recorded in the computer system. 
     Furthermore, the base station device  3  according to the above-described embodiment may be achieved as an aggregation (an device group) including multiple devices. Each of the devices configuring such an device group may include some or all of the functions or the functional blocks of the base station device  3  according to the above-described embodiment. The device group may include each general function or each functional block 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 the aggregation. 
     Furthermore, the base station device  3  according to the above-described embodiment may serve as an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and/or NG-RAN (Next Gen RAN, NR-RAN). Furthermore, the base station device  3  according to the above-described embodiment may have some or all of the functions of a node higher than an eNodeB or the gNB. 
     Furthermore, some or all portions of each of the terminal device  1  and the base station device  3  according to the above-described embodiment may be typically achieved as an LSI which is an integrated circuit or may be achieved as a chip set. The functional blocks of each of the terminal device  1  and the base station device  3  may be individually achieved as a chip, or some or all of the functional blocks may be integrated into a chip. Furthermore, a circuit integration technique is not limited to the LSI, and may be realized with a dedicated circuit or a general-purpose processor. Furthermore, in a case that with advances in semiconductor technology, a circuit integration technology with which an LSI is replaced appears, it is also possible to use an integrated circuit based on the technology. 
     Furthermore, according to the above-described embodiment, the terminal device has been described as an example of a communication device, but the present invention is not limited to such a terminal device, and is applicable to a terminal device or a communication device of a fixed-type or a stationary-type electronic device installed indoors or outdoors, for example, such as an Audio-Video (AV) device, a kitchen device, a cleaning or washing machine, an air-conditioning device, office equipment, a vending machine, and other household devices. 
     The embodiments of the present invention have been described in detail above referring to the drawings, but the specific configuration is not limited to the embodiments and includes, for example, an amendment to a design that falls within the scope that does not depart from the gist of the present invention. Furthermore, various modifications are possible within the scope of one aspect of the present invention defined by claims, and embodiments that are made by suitably combining technical means disclosed according to the different embodiments are also included in the technical scope of the present invention. Furthermore, a configuration in which constituent elements, described in the respective embodiments and having mutually the same effects, are substituted for one another is also included in the technical scope of the present invention.