WO2022071171A1 - Terminal device, base station device, and communication method - Google Patents

Abstract

This terminal device comprises: a reception unit that receives a DCI format included in a PDCCH; and a transmission unit that transmits at least a first PUCCH and a second PUCCH. The DCI format indicates transmission on the first PUCCH including a first UCI and transmission on the second PUCCH including a second UCI. The number of resource blocks to which the second PUCCH is mapped and the number of resource blocks to which the first PUCCH is mapped are determined as being the identical number of resource blocks, and the identical number of resource blocks is determined on the basis of a certain condition.

Description

Terminal equipment, base station equipment, and communication methods

The present invention relates to a terminal device, a base station device, and a communication method.
The present application claims priority with respect to Japanese Patent Application No. 2020-162799 filed in Japan on September 29, 2020, the contents of which are incorporated herein by reference.

The 3rd Generation Partnership Project ( ^3GPP : 3rd) is the wireless access method and wireless network for cellular mobile communication (hereinafter also referred to as "Long Term Evolution (LTE)" or "EUTRA: Evolved Universal Terrestrial Radio Access"). It is being considered in the Generation Partnership Project). In LTE, the base station device is also called an eNodeB (evolved NodeB), and the terminal device is also called a UE (User Equipment). LTE is a cellular communication system in which a plurality of areas covered by a base station device are arranged in a cell shape. A single base station appliance may manage multiple serving cells.

At 3GPP, the next-generation standard (NR: New Radio) will be examined in order to propose to IMT (International Mobile Telecommunication) -2020, which is the standard for next-generation mobile communication systems established by the International Telecommunication Union (ITU). (Non-Patent Document 1). NR is required to meet the requirements assuming three scenarios of eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication) within the framework of a single technology. There is.

In 3GPP, the expansion of services supported by NR is being studied (Non-Patent Document 2).

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

(1) The first aspect of the present invention is a terminal device, comprising a receiving unit for receiving the DCI format included in the PDCCH, and a transmitting unit for transmitting at least the first PUCCH and the second PUCCH. The DCI format indicates transmission of the first PUCCH containing a first UCI and transmission of the second PUCCH containing a second UCI, wherein the first UCI is a code of one UCI. The second UCI is the first part of the sequence of coded bits, the second UCI is the second part of the sequence of coded bits, and the coded bits of at least one bit contained in the first part are It is the same as or different from all the coding bits contained in the second part.

(2) Further, the second aspect of the present invention is a base station apparatus, in which a transmission unit for transmitting the DCI format included in the PDCCH and a reception unit for receiving at least the first PUCCH and the second PUCCH are provided. The DCI format indicates that the transmission of the first PUCCH including the first UCI and the transmission of the second PUCCH including the second UCI, and the first UCI is one. The first part of the sequence of UCI coding bits, the second UCI is the second part of the sequence of coding bits, and the coding of at least one bit contained in the first part. The bits are the same as some of the coded bits contained in the second part, or are different from all the coded bits contained in the second part.

(3) Further, the third aspect of the present invention is a communication method used for a terminal device, in which a step of receiving a DCI format included in a PDCCH and at least transmitting a first PUCCH and a second PUCCH are transmitted. The DCI format comprises a step indicating that the transmission of the first PUCCH including the first UCI and the transmission of the second PUCCH including the second UCI. The first part of a sequence of coded bits of one UCI, the second UCI is the second part of the sequence of coded bits, and at least one bit contained in the first part. The coding bit is the same as or different from all the coding bits contained in the second part.

(4) Further, a fourth aspect of the present invention is a communication method used for a base station apparatus, in which a step of transmitting a DCI format included in a PDCCH and at least a first PUCCH and a second PUCCH are received. The DCI format directs the transmission of the first PUCCH containing the first UCI and the transmission of the second PUCCH containing the second UCI. A first part of a sequence of coded bits of one UCI, said second UCI is a second part of the sequence of coded bits, and at least one bit contained in said first part. The coding bits of are the same as some of the coding bits contained in the second part, or different from all the coding bits contained in the second part.

According to one aspect of the present invention, the terminal device can efficiently communicate. In addition, the base station device can efficiently communicate.

It is a conceptual diagram of the wireless communication system which concerns on one aspect of this Embodiment. This is an example showing the relationship between the setting μ of the subcarrier interval, the number of OFDM symbols per slot N ^slot _symb , and the CP (cyclic Prefix) setting according to one embodiment of the present embodiment. It is a figure which shows an example of the composition method of the resource grid which concerns on one aspect of this Embodiment. It is a figure which shows the configuration example of the resource grid 3001 which concerns on one aspect of this embodiment. It is a schematic block diagram which shows the structural example of the base station apparatus 3 which concerns on one aspect of this Embodiment. It is a schematic block diagram which shows the structural example of the terminal apparatus 1 which concerns on one aspect of this Embodiment. It is a figure which shows the structural example of the SS / PBCH block which concerns on one aspect of this embodiment. It is a figure which shows an example of the monitoring opportunity of the search area set which concerns on one aspect of this Embodiment. It is a figure which shows the example which the DCI format which concerns on one embodiment of this Embodiment directs PUCCH transmission in each of two slots.

Hereinafter, embodiments of the present invention will be described.

Floor (C) may be a floor function for a real number C. For example, floor (C) may be a function that outputs the maximum integer in the range that does not exceed the real number C. ceil (D) may be a ceiling function for a real number D. For example, ceil (D) may be a function that outputs the smallest integer within the range not less than the real number D. The mod (E, F) may be a function that outputs the remainder of dividing E by F. The mod (E, F) may be a function that outputs a value corresponding to the remainder obtained by dividing E by F. exp (G) = e ^ G. Here, e is the number of Napiers. H ^ I indicates H to the I power. max (J, K) is a function that outputs the maximum value of J and K. Here, max (J, K) is a function that outputs J or K when J and K are equal. min (L, M) is a function that outputs the maximum value of L and M. Here, min (L, M) is a function that outputs L or M when L and M are equal. round (N) is a function that outputs an integer value closest to N.

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

The OFDM symbol may be a name including a CP added to the OFDM symbol. That is, a certain OFDM symbol may be configured to include the certain OFDM symbol and the CP added to the certain OFDM symbol.

FIG. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment. In FIG. 1, the wireless communication system includes at least terminal devices 1A to 1C and a base station device 3 (BS # 3: Base station # 3). Hereinafter, the terminal devices 1A to 1C are also referred to as a terminal device 1 (UE # 1: UserEquipment # 1).

The base station device 3 may be configured to include one or more transmission devices (or transmission points, transmission / reception devices, transmission / reception points). When the base station device 3 is composed of a plurality of transmitting devices, each of the plurality of transmitting devices may be arranged at a different position.

The base station device 3 may provide one or more serving cells. Serving cells may be defined as a set of resources used for wireless communication. Serving cells are also referred to as cells.

The serving cell may be configured to include at least one downlink component carrier (downlink carrier) and / or one uplink component carrier (uplink carrier). The serving cell may be configured to include at least two or more downlink component carriers and / or two or more uplink component carriers. The downlink component carrier and the uplink component carrier are also referred to as component carriers (carriers).

For example, one resource grid may be given for one component carrier. Also, one resource grid may be given for one component carrier and one subcarrier spacing configuration μ. Here, the setting μ of the subcarrier interval is also referred to as numerology. The resource grid contains N ^{size, μ} _{grid, x} N ^RB _sc subcarriers. The resource grid starts from the common resource blocks N ^{start, μ} _{grid, x} . The common resource blocks N ^{start, μ} _{grid, and x} are also referred to as reference points of the resource grid. The resource grid contains N ^{subframe, μ} _symb OFDM symbols. x is a subscript indicating the transmission direction, and indicates either a downlink or an uplink. One resource grid is given for a set of antenna ports p, a subcarrier spacing setting μ, and a transmission direction x.

N ^{size, μ} _{grid, x} and N ^{start, μ} _{grid, x} are given at least based on the upper layer parameter (CarrierBandwidth). The upper layer parameter is also referred to as an SCS specific carrier. One resource grid corresponds to one SCS-specific carrier. One component carrier may include one or more SCS-specific carriers. The SCS-specific carrier may be included in the system information. For each SCS-specific carrier, one subcarrier spacing setting μ may be given.

The subcarrier interval (SCS: SubCarrier Spacing) Δf may be Δf = 2 ^μ · 15 kHz. For example, the setting μ of the subcarrier interval may indicate any of 0, 1, 2, 3, or 4.

FIG. 2 is an example showing the relationship between the setting μ of the subcarrier interval, the number of OFDM symbols per slot N ^slot _symb , and the CP (cyclic Prefix) setting according to one embodiment of the present embodiment. In FIG. 2A, for example, when the subcarrier interval setting μ is 2 and the CP setting is normal CP (normal cyclic prefix), N ^slot _symb = 14, N ^{frame, μ} _slot = 40, N ^{subframe, μ} _slot . = 4. Further, in FIG. 2B, for example, when the subcarrier interval setting μ is 2 and the CP setting is an extended CP (extended cyclic prefix), N ^slot _symb = 12, N ^{frame, μ} _slot = 40, N ^{subframe, μ} _slot = 4.

In the wireless communication system according to one aspect of the present embodiment, a time unit (time unit) T _c may be used to express the length of the time domain. The time unit T _c is T _c = 1 / (Δf _max · N _f ). Δf _max = 480 kHz. N _f = 4096. The constant κ is κ = Δf _max · N _f / (Δf _ref N _{f, ref} ) = 64. Δf _ref is 15 kHz. N _{f and ref} are 2048.

The transmission of signals on the downlink and / or the transmission of signals on the uplink may be organized into radio frames (system frames, frames) of length T _f . T _f = (Δf _max N _f / 100) · T _s = 10 ms. “・” Indicates multiplication. The radio frame is composed of 10 subframes. The length of the subframe T _sf = (Δf _max N _f / 1000) · T _s = 1 ms. The number of OFDM symbols per subframe is N ^{subframe, μ} _symb = N ^slot _symb N ^{subframe, μ} _slot .

The number and index of slots contained in a subframe may be given for a given subcarrier spacing setting μ. For example, the slot index n ^μ _s may be given in ascending order with an integer value in the range of 0 to N ^{subframe, μ} _slot -1 in the subframe. The number and index of slots contained in the radio frame may be given for the setting μ of the subcarrier spacing. Further, the slot indexes n ^μ _{s and f} may be given in ascending order by an integer value in the range of 0 to N ^{frame, μ} _slot -1 in the radio frame. One slot may contain consecutive N ^slot _symb OFDM symbols. N ^slot _symb = 14.

FIG. 3 is a diagram showing an example of a method of configuring a resource grid according to an embodiment of the present embodiment. The horizontal axis of FIG. 3 indicates a frequency domain. FIG. 3 shows a configuration example of a resource grid having a subcarrier spacing μ ₁ in the component carrier 300 and a configuration example of a resource grid having a subcarrier spacing μ ₂ in the component carrier. In this way, one or more subcarrier intervals may be set for a certain component carrier. In FIG. 3, it is assumed that μ ₁ = μ _2-1 but the various aspects of this embodiment are not limited to the condition of μ ₁ = μ _2-1 .

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

Point 3000 is an identifier for identifying a certain subcarrier. Point 3000 is also referred to as point A. The common resource block (CRB) set 3100 is a set of common resource blocks for the subcarrier interval setting μ ₁ .

Of the common resource block set 3100, the common resource block including the point 3000 (the block indicated by the upward slash in FIG. 3) is also referred to as the 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 having an index of 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. Offset 3011 is indicated by the number of common resource blocks for the subcarrier spacing setting μ ₁ . The resource grid 3001 includes N ^{size, μ} grid 1 _{, 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, μ} _{BWP, i1} ) of the BWP (BandWidth Part) 3003 of the index i1.

The common resource block set 3200 is a set of common resource blocks for the setting μ ₂ of the subcarrier interval.

Of the common resource block set 3200, the common resource block including the point 3000 (the block indicated by the upward slash in FIG. 3) is also referred to as the reference point of the common resource block set 3200. The reference point of the common resource block set 3200 may be the common resource block of 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. Offset 3012 is indicated by the number of common resource blocks for the subcarrier spacing μ ₂ . The resource grid 3002 includes N ^{size, μ} _{grid 2, 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, μ} _{BWP, i2} ) of the BWP 3004 of the index i2.

FIG. 4 is a diagram showing a configuration example of the resource grid 3001 according to one aspect of the present embodiment. In the resource grid of FIG. 4, the horizontal axis is the OFDM symbol index l _sym , and the vertical axis is the subcarrier index k _sc . The resource grid 3001 contains N ^{size, μ} _{grid1, x} N ^RB _sc subcarriers, and N ^{subframe, μ} _symb OFDM symbols. Within the resource grid, the resources identified by the subcarrier index k _sc and the OFDM symbol index l _sym are also referred to as resource elements (REs).

A resource block ( ^RB ) contains NRB _sc consecutive subcarriers. A resource block is a general term for a common resource block, a physical resource block (PRB), and a virtual resource block (VRB). Here, ^NRB _sc = 12.

A resource block unit is a set of resources corresponding to one OFDM symbol in one resource block. That is, one resource block unit contains twelve resource elements corresponding to one OFDM symbol in one resource block.

Common resource blocks for a setting μ of a subcarrier interval are indexed in ascending order from 0 in the frequency domain in a common resource block set. A common resource block at index 0 for a given subcarrier interval setting μ contains (or collides with) points 3000. The index n ^μ _CRB of the common resource block for a certain subcarrier interval setting μ satisfies the relationship n ^μ _CRB = ceil (k _sc / N ^RB _sc ). Here, the subcarrier with k _sc = 0 is a subcarrier having the same center frequency as the center frequency of the subcarrier corresponding to the point 3000.

Physical resource blocks for a setting μ of a subcarrier spacing are indexed in ascending order from 0 in the frequency domain in a BWP. The index n ^μ _PRB of the physical resource block for a certain subcarrier interval setting μ satisfies the relationship of n ^μ _CRB = n ^μ _PRB + N ^{start, μ} _{BWP, i} . Here, N ^{start, μ} _{BWP, and i} indicate the reference point of the BWP of the index i.

BWP is defined as a subset of common resource blocks contained in the resource grid. The BWP includes N ^{sizes, μ} _{BWP, i} common resource blocks starting from the reference point N ^{start, μ} _{BWP, i} of the BWP. The BWP set for the downlink carrier is also referred to as a downlink BWP. The BWP set for the uplink component carrier is also referred to as the uplink BWP.

An antenna port may be defined by the fact that the channel on which a symbol is transmitted at one antenna port can be inferred from the channel on which other symbols are transmitted at that antenna port (An antenna port is defined such that the channel over which). a symbol on the antenna port is conveyed can be inverted from the channel over which another symbol on the same antenna port is conveyed). For example, the channel may correspond to a physical channel. Further, the symbol may correspond to an OFDM symbol. The symbol may also correspond to a resource block unit. The symbol may also correspond to a resource element.

The large scale property of the channel through which the symbol is transmitted in one antenna port can be estimated from the channel in which the symbol is transmitted in the other antenna port, that the two antenna ports are QCL (Quasi Co-Located). ). Large-scale characteristics may include at least long-interval characteristics of the channel. Large-scale characteristics include delay spread, Doppler spread, Doppler shift, average gain, average delay, and beam parameters (spatial Rx parameters). It may include at least some or all. The fact that the first antenna port and the second antenna port are QCL with respect to the beam parameters means that the receiving beam assumed by the receiving side with respect to the first antenna port and the receiving beam assumed by the receiving side with respect to the second antenna port. May be the same. The fact that the first antenna port and the second antenna port are QCL with respect to the beam parameters means that the transmission beam assumed by the receiving side with respect to the first antenna port and the transmitting beam assumed by the receiving side with respect to the second antenna port. May be the same. The terminal device 1 assumes that the two antenna ports are QCLs if the large scale characteristics of the channel through which the symbol is transmitted in one antenna port can be estimated from the channel in which the symbol is transmitted in the other antenna port. May be done. The fact that the two antenna ports are QCLs may mean that the two antenna ports are QCLs.

Carrier aggregation may be communication using a plurality of aggregated serving cells. Further, carrier aggregation may be communication using a plurality of aggregated component carriers. Further, carrier aggregation may be to perform communication using a plurality of aggregated downlink component carriers. Further, carrier aggregation may be to perform 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 one embodiment of the present embodiment. As shown in FIG. 5, the base station apparatus 3 includes at least a part or all of the radio transmission / reception unit (physical layer processing unit) 30 and / or the upper layer processing unit 34. The radio transmission / reception unit 30 includes at least a part or all of an antenna unit 31, an RF (Radio Frequency) unit 32, and a baseband unit 33. The upper layer processing unit 34 includes at least a part or all of 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 or all of the wireless transmission unit 30a and the wireless reception unit 30b. Here, the device configurations of the baseband unit included in the wireless transmission unit 30a and the baseband unit included in the wireless reception unit 30b may be the same or different. Further, the device configurations of the RF unit included in the wireless transmission unit 30a and the RF unit included in the wireless reception unit 30b may be the same or different. Further, the device configurations of the antenna unit included in the wireless transmission unit 30a and the antenna unit included in the wireless reception unit 30b may be the same or different.

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

For example, the wireless receiving unit 30b may receive the PRACH. For example, the radio receiving unit 30b may receive the PUCCH and demodulate it. The radio receiving unit 30b may receive the PUSCH and demodulate it. For example, the wireless receiving unit 30b may receive the PUCCH DMRS. For example, the wireless receiving unit 30b may receive the PUSCH DMRS. For example, the wireless receiving unit 30b may receive UL PTRS. For example, the wireless receiving unit 30b may receive the SRS.

The upper layer processing unit 34 outputs the downlink data (transport block) to the wireless transmission / reception unit 30 (or the wireless transmission unit 30a). The upper layer processing unit 34 processes the MAC (Medium Access Control) layer, the packet data integration protocol (PDCP: Packet Data Convergence Protocol) layer, the wireless link control (RLC: Radio Link Control) layer, and the RRC layer.

The medium access control layer processing unit 35 included in the upper layer processing unit 34 processes the MAC layer.

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

The wireless transmission / reception unit 30 (or the wireless transmission unit 30a) performs processing such as modulation and coding. The wireless transmission / reception unit 30 (or wireless transmission unit 30a) generates a physical signal by modulating, encoding, and generating a baseband signal (converting to a time continuous signal) of downlink data, and transmits the physical signal to the terminal device 1. .. The wireless transmission / reception unit 30 (or the wireless transmission unit 30a) may arrange a physical signal on a component carrier and transmit it to the terminal device 1.

The wireless transmission / reception unit 30 (or wireless reception unit 30b) performs processing such as demodulation and decoding. The wireless transmission / reception unit 30 (or the wireless reception unit 30b) separates, demodulates, and decodes the received physical signal, and outputs the decoded information to the upper layer processing unit 34. The radio transmission / reception unit 30 (or the radio reception unit 30b) may carry out a channel access procedure prior to transmission of a physical signal.

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

The baseband unit 33 converts the analog signal (analog signal) input from the RF unit 32 into a digital signal (digital signal). The baseband unit 33 removes a portion corresponding to a CP (Cyclic Prefix) from the converted digital signal, performs a fast Fourier transform (FFT) on the signal from which the CP has been removed, and outputs a signal in the frequency domain. Extract.

The baseband unit 33 performs inverse fast Fourier transform (IFFT) on the data to generate an OFDM symbol, adds CP to the generated OFDM symbol, generates a baseband digital signal, and basebands the data. Converts a band digital signal to an analog signal. The baseband unit 33 outputs the converted analog signal to the RF unit 32.

The RF unit 32 removes an extra frequency component from the analog signal input from the baseband unit 33 using a low-pass filter, upconverts the analog signal to the carrier frequency, and transmits the analog signal via the antenna unit 31. do. Further, the RF unit 32 may have a function of controlling the transmission power. The RF unit 32 is also referred to as a transmission power control unit.

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

Each of the serving cells set for the terminal device 1 is one of PCell (Primary cell, primary cell), PSCell (Primary SCG cell, primary SCG cell), and SCell (Secondary Cell, secondary cell). May be good.

PCell is a serving cell included in MCG (Master Cell Group). The PCell is a cell (implemented cell) that carries out an initial connection establishment procedure (initial connection establishment procedure) or a connection re-establishment procedure (connection re-establishment procedure) by the terminal device 1.

PSCell is a serving cell included in SCG (Secondary Cell Group). The PSCell is a serving cell in which random access is performed by the terminal device 1 in a reconfiguration with synchronization procedure.

SCell may be included in either MCG or SCG.

Serving cell group (cell group) is a name that includes at least MCG and SCG. The serving cell group may include one or more serving cells (or component carriers). One or more serving cells (or component carriers) included in a serving cell group may be operated by carrier aggregation.

One or more downlink BWPs may be set for each of the serving cells (or downlink component carriers). One or more uplink BWPs may be set for each serving cell (or uplink component carrier).

Of the one or more downlink BWPs configured for the serving cell (or downlink component carrier), one downlink BWP may be configured as the active downlink BWP (or one downlink BWP). May be activated). Of the one or more uplink BWPs configured for the serving cell (or uplink component carrier), one uplink BWP may be configured as the active uplink BWP (or one uplink BWP). May be activated).

PDSCH, PDCCH, and CSI-RS may be received on the active downlink BWP. The terminal device 1 may receive PDSCH, PDCCH, and CSI-RS on the active downlink BWP. The PUCCH and PUSCH may be transmitted 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 an active BWP.

The PDSCH, PDCCH, and CSI-RS do not have to be received in the downlink BWP (inactive downlink BWP) other than the active downlink BWP. The terminal device 1 does not have to receive PDSCH, PDCCH, and CSI-RS in the downlink BWP other than the active downlink BWP. The PUCCH and PUSCH may not be transmitted on an uplink BWP (inactive uplink BWP) other than the active uplink BWP. The terminal device 1 does not have to transmit the PUCCH and the PUSCH in the uplink BWP other than the active uplink BWP. The inactive downlink BWP and the inactive uplink BWP are also referred to as an inactive BWP.

The downlink BWP switch is for deactivating one active downlink BWP and activating any of the inactive downlink BWPs other than the one active downlink BWP. Used. The downlink BWP switching may be controlled by the BWP field included in the downlink control information. The downlink BWP switching may be controlled based on the parameters of the upper layer.

Uplink BWP switching is used to deactivate one active uplink BWP and activate any of the inactive uplink BWPs other than the one active uplink BWP. The uplink BWP switching may be controlled by the BWP field included in the downlink control information. The uplink BWP switching may be controlled based on the parameters of the upper layer.

Of the one or more downlink BWPs set for the serving cell, two or more downlink BWPs need not be set as the active downlink BWP. One downlink BWP may be active for a serving cell at a given time.

Of the one or more uplink BWPs set for the serving cell, two or more uplink BWPs need not be set as the active uplink BWP. One uplink BWP may be active for a serving cell at a given time.

FIG. 6 is a schematic block diagram showing a configuration example of the terminal device 1 according to one embodiment of the present embodiment. As shown in FIG. 6, the terminal device 1 includes at least one or all of the wireless transmission / reception unit (physical layer processing unit) 10 and the upper layer processing unit 14. The radio transmission / reception unit 10 includes at least a part or all of the antenna unit 11, the RF unit 12, and the baseband unit 13. The upper layer processing unit 14 includes at least a part or all of 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 or all of the wireless transmission unit 10a and the wireless reception unit 10b. Here, the device configurations of the baseband unit 13 included in the wireless transmission unit 10a and the baseband unit 13 included in the wireless reception unit 10b may be the same or different. Further, the device configurations of the RF unit 12 included in the wireless transmission unit 10a and the RF unit 12 included in the wireless reception unit 10b may be the same or different. Further, the device configurations of the antenna unit 11 included in the wireless transmission unit 10a and the antenna unit 11 included in the wireless reception unit 10b may be the same or different.

For example, the wireless transmission unit 10a may generate and transmit a PRACH baseband signal. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of PUCCH. The wireless transmission unit 10a may generate and transmit a PUSCH baseband signal. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of PUCCH DMRS. For example, the wireless transmission unit 10a may generate and transmit a baseband signal of PUSCH DMRS. For example, the wireless transmission unit 10a may generate and transmit a UL PTRS baseband signal. For example, the wireless transmission unit 10a may generate and transmit an SRS baseband signal.

For example, the wireless receiving unit 10b may receive the PDSCH and demodulate it. For example, the wireless receiver 10b may receive the PDCCH and demodulate it. For example, the radio receiving unit 10b may receive the PBCH and demodulate it. For example, the wireless receiving unit 10b may receive the synchronization signal. For example, the wireless receiving unit 10b may receive the PDSCH DMRS. For example, the wireless receiving unit 10b may receive the PDCCH DMRS. For example, the wireless receiving unit 10b may receive the CSI-RS. For example, the wireless receiving unit 10b may receive DL PTRS.

The upper layer processing unit 14 outputs uplink data (transport block) to the wireless transmission / reception unit 10 (or wireless transmission unit 10a). The upper layer processing unit 14 processes the MAC layer, the packet data integration protocol layer, the wireless link control layer, and the RRC layer.

The medium access control layer processing unit 15 included in the upper layer processing unit 14 processes the MAC layer.

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

The wireless transmission / reception unit 10 (or the wireless transmission unit 10a) performs processing such as modulation and coding. The wireless transmission / reception unit 10 (or wireless transmission unit 10a) generates a physical signal by modulating, encoding, and generating a baseband signal (converting to a time continuous signal) of uplink data, and transmits the physical signal to the base station apparatus 3. do. The radio transmission / reception unit 10 (or radio transmission unit 10a) may arrange a physical signal in a certain BWP (active uplink BWP) and transmit it to the base station apparatus 3.

The wireless transmission / reception unit 10 (or wireless reception unit 10b) performs processing such as demodulation and decoding. The radio transmission / reception unit 10 (or radio reception unit 30b) may receive a physical signal in a BWP (active downlink BWP) having a certain serving cell. The wireless transmission / reception unit 10 (or wireless reception unit 10b) separates, demodulates, and decodes the received physical signal, and outputs the decoded information to the upper layer processing unit 14. The wireless transmission / reception unit 10 (radio reception unit 10b) may carry out a channel access procedure prior to transmission of a physical signal.

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

The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 removes a portion corresponding to a CP (Cyclic Prefix) from the converted digital signal, performs a fast Fourier transform (FFT) on the signal from which the CP has been removed, and obtains a signal in the frequency domain. Extract.

The baseband unit 13 generates an OFDM symbol by performing an inverse fast Fourier transform (IFFT) on the uplink data, adds a CP to the generated OFDM symbol, and generates a baseband digital signal. , Converts a baseband digital signal to an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

The RF unit 12 removes an extra frequency component from the analog signal input from the baseband unit 13 using a low-pass filter, upconverts the analog signal to the carrier frequency, and transmits the analog signal via the antenna unit 11. do. Further, the RF unit 12 may have a function of controlling the transmission power. The RF unit 12 is also referred to as a transmission power control unit.

The physical signal (signal) will be described below.

Physical signal is a general term for downlink physical channel, downlink physical signal, uplink physical channel, and uplink physical channel. The physical channel is a general term for a downlink physical channel and an uplink physical channel. The physical signal is a general term for a downlink physical signal and an uplink physical signal.

An uplink physical channel may correspond to a set of resource elements that carry information that occurs in the upper layers. The uplink physical channel may be the physical channel used in the 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 apparatus 3. In the wireless communication system according to one embodiment of the present embodiment, at least a part or all of the following uplink physical channels may be used.
・ PUCCH (Physical Uplink Control CHannel)
・ PUSCH (Physical Uplink Shared CHannel)
・ PRACH (Physical Random Access CHannel)

PUCCH may be used to transmit uplink control information (UCI: Uplink Control Information). The PUCCH may be transmitted to transmit uplink control information (deliver, transmission, convey). The uplink control information may be mapped to the PUCCH. The terminal device 1 may transmit the PUCCH in which the uplink control information is arranged. The base station apparatus 3 may receive the PUCCH in which the uplink control information is arranged.

The uplink control information (uplink control information bit, uplink control information sequence, uplink control information type) includes channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), and HARQ-ACK (Hybrid). AutomaticRepeatrequestACKnowledgement) Includes at least some or all of the information.

The channel state information is also referred to as a channel state information bit or a channel state information series. The scheduling request is also referred to as a scheduling request bit or a scheduling request series. The HARQ-ACK information is also referred to as a HARQ-ACK information bit or a HARQ-ACK information series.

HARQ-ACK information is a transport block (or 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. It may contain at least HARQ-ACK corresponding to Channel, PUSCH: Physical Uplink Shared CHannel). HARQ-ACK may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to the transport block. ACK may indicate that the transport block has been successfully decrypted (has been decoded). NACK may indicate that the decryption of the transport block has not been successfully completed (has not been decoded). The HARQ-ACK information may include a HARQ-ACK codebook containing one or more HARQ-ACK bits.

Correspondence between the HARQ-ACK information and the transport block may mean that the HARQ-ACK information corresponds to the PDSCH used for the transmission of the transport block.

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

Scheduling requests may at least be used to request PUSCH (or UL-SCH) resources for initial transmission. The scheduling request bit may be used to indicate either a positive SR (positive SR) or a negative SR (negative SR). The fact that the scheduling request bit indicates a positive SR is also referred to as "a positive SR is transmitted". A positive SR may indicate that the terminal device 1 requires a PUSCH (or UL-SCH) resource for initial transmission. A positive SR may indicate that the scheduling request is triggered by the higher layer. The positive SR may be transmitted when the upper layer instructs to transmit the scheduling request. The fact that the scheduling request bit indicates a negative SR is also referred to as "a negative SR is transmitted". A negative SR may indicate that the terminal device 1 does not require a PUSCH (or UL-SCH) resource for initial transmission. A negative SR may indicate that the scheduling request is not triggered by the higher layer. Negative SRs may be sent if the higher layer does not instruct them to send the scheduling request.

The channel state information may include at least a part or all of a channel quality index (CQI: Channel Quality Indicator), a precoder matrix index (PMI: Precoder Matrix Indicator), and a rank index (RI: Rank Indicator). CQI is an index related to the quality of the propagation path (for example, propagation intensity) or the quality of the physical channel, and PMI is an index related to the precoder. RI is an index related to the transmission rank (or the number of transmission layers).

Channel state information may be given at least on the basis of receiving at least a physical signal (eg, CSI-RS) used for channel measurement. The channel state information may be selected by the terminal device 1 at least based on receiving the physical signal used at least for the channel measurement. The channel measurement may include an interference measurement.

PUCCH may support the PUCCH format. The PUCCH may be a set of resource elements used to convey the PUCCH format. The PUCCH may include the PUCCH format.

PUSCH may be used to transmit transport blocks and / or uplink control information. The PUSCH may be used to transmit UL-SCH-corresponding transport blocks and / or uplink control information. The PUSCH may be used to convey transport blocks and / or uplink control information. The PUSCH may be used to convey UL-SCH-corresponding transport blocks and / or uplink control information. The transport block may be located on the PUSCH. The transport block corresponding to UL-SCH may be arranged in PUSCH. The uplink control information may be arranged in the PUSCH. The terminal device 1 may transmit a transport block and / or a PUSCH in which uplink control information is arranged. The base station apparatus 3 may receive the transport block and / or the PUSCH in which the uplink control information is arranged.

PRACH may be used to send a random access preamble. PRACH may be used to convey a random access preamble. The PRACH sequence x _{u, v} (n) is defined by x _{u, v} (n) = x _u (mod (n + C _v , L _RA )). x _u may be a ZC (Zadoff Chu) series. x _u is defined by x _u = exp (-jπui (i + 1) / L _RA ). j is an imaginary unit. Also, π is the pi. _Cv corresponds to the cyclic shift of the PRACH series. L _RA corresponds to the length of the PRACH series. L _RA is 839, or 139. i is an integer in the range 0 to L _RA -1. u is a series index for PRACH series. The terminal device 1 may transmit PRACH. The base station apparatus 3 may receive the PRACH.

For a PRACH opportunity, 64 random access preambles are defined. The random access preamble is specified (determined, given) at least based on the cyclic shift Cv of the PRACH sequence and the sequence index _u for the PRACH sequence. Each of the 64 random access preambles identified may be indexed.

The uplink physical signal may correspond to a set of resource elements. The uplink physical signal does not have to carry the information generated in the upper layer. The uplink physical signal may be the 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 an uplink physical signal. In the wireless communication system according to one embodiment of the present embodiment, at least a part or all of the following uplink physical signals may be used.
・ UL DMRS (UpLink Demodulation Reference Signal)
・ SRS (Sounding Reference Signal)
・ UL PTRS (UpLink Phase Tracking Reference Signal)

UL DMRS is a general term for DMRS for PUSCH and DMRS for PUCCH.

The set of antenna ports of DMRS for PUSCH (DMRS related to PUSCH, DMRS included in PUSCH, DMRS corresponding to PUSCH) may be given based on the set of antenna ports for PUSCH. That is, the set of DMRS antenna ports for the PUSCH may be the same as the set of the PUSCH antenna ports.

The transmission of the PUSCH and the transmission of the DMRS for the PUSCH may be indicated (or scheduled) in one DCI format. The PUSCH and the DMRS for the PUSCH may be collectively referred to as the PUSCH. Transmitting the PUSCH may be transmitting the PUSCH and the DMRS for the PUSCH.

The PUSCH may be estimated from the DMRS for the PUSCH. That is, the propagation path of the PUSCH may be estimated from the DMRS for the PUSCH.

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

The transmission of the PUCCH and the transmission of the DMRS for the PUCCH may be indicated (or triggered) in one DCI format. The mapping of PUCCH to resource elements (resource element mapping) and / or the mapping of DMRS to resource elements for the PUCCH may be given in one PUCCH format. PUCCH and DMRS for the PUCCH may be collectively referred to as PUCCH. Transmission of PUCCH may be transmission of PUCCH and DMRS for the PUCCH.

PUCCH may be estimated from DMRS for the PUCCH. That is, the propagation path of the PUCCH may be estimated from the DMRS for the PUCCH.

The downlink physical channel may correspond to a set of resource elements carrying information generated in the upper layer. The downlink physical channel may be the physical channel used in the downlink component carrier. The base station device 3 may transmit a downlink physical channel. The terminal device 1 may receive the downlink physical channel. In the wireless communication system according to one embodiment of the present embodiment, at least a part or all of the following downlink physical channels may be used.
・ PBCH (Physical Broadcast Channel)
・ PDCCH (Physical Downlink Control Channel)
・ PDSCH (Physical Downlink Shared Channel)

The PBCH may be used to transmit a MIB (MIB: Master Information Block) and / or physical layer control information. The PBCH may be transmitted to transmit MIB and / or physical layer control information (deliver, transmission, convey). BCH may be mapped to PBCH. The terminal device 1 may receive the MIB and / or the PBCH in which the physical layer control information is arranged. The base station apparatus 3 may transmit a MIB and / or a PBCH in which physical layer control information is arranged. The physical layer control information is also referred to as a PBCH payload or a PBCH payload related to timing. The MIB may include one or more upper layer parameters.

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

The radio frame bit is used to indicate a radio frame through which the PBCH is transmitted (a radio frame including a slot through which the PBCH is transmitted). The radio frame bit includes 4 bits. The radio frame bit may be composed of 4 bits of the 10-bit radio frame indicator. For example, the radio frame indicator may be at least used to identify radio frames from index 0 to index 1023.

The half radio frame bit is used to indicate whether the PBCH is transmitted in the first five subframes or the latter five subframes among the radio frames in which the PBCH is transmitted. Here, the half radio frame may be configured to include five subframes. Further, the half radio frame may be composed of five subframes in the first half of the ten subframes included in the radio frame. Further, the half radio frame may be composed of the latter five subframes out of the ten subframes included in the radio frame.

The SS / PBCH block index bit is used to indicate the SS / PBCH block index. The SS / PBCH block index bit includes 3 bits. The SS / PBCH block index bit may be composed of 3 bits of the 6-bit SS / PBCH block index specifier. The SS / PBCH block index indicator may at least be used to identify SS / PBCH blocks from index 0 to index 63.

The subcarrier offset bit is used to indicate the subcarrier offset. The subcarrier offset may be used to indicate the difference between the first subcarrier to which the PBCH is mapped and the first subcarrier to which the control resource set at index 0 is mapped.

PDCCH may be used to transmit downlink control information (DCI: Downlink Control Information). The PDCCH may be transmitted to transmit downlink control information (deliver, transmission, convey). The downlink control information may be arranged (mapped) in the PDCCH. The terminal device 1 may receive the PDCCH in which the downlink control information is arranged. The base station apparatus 3 may transmit the PDCCH in which the downlink control information is arranged.

The downlink control information may correspond to the DCI format. The downlink control information may be included in the DCI format. The downlink control information may be placed in each field of the DCI format.

DCI format 0_1, DCI format 0_1, DCI format 1_1, and DCI format 1_1 are DCI formats including different sets of fields. The uplink DCI format is a general term for DCI format 0_0 and DCI format 0_1. The downlink DCI format is a general term for DCI format 1_0 and DCI format 1_1.

DCI format 0_0 is at least used for scheduling PUSCH in a cell (or placed in a cell). DCI format 0_0 comprises at least some or all of the fields 1A to 1E.
1A) Identifier field for DCI formats
)
1B) Frequency domain resource allocation field
1C) Time domain resource allocation field
1D) Frequency hopping flag field
1E) MCS field (MCS field: Modulation and Coding Scheme field)

The DCI format specific field may indicate whether the DCI format including the DCI format specific field is the uplink DCI format or the downlink DCI format. The DCI format specific field contained in DCI format 0_0 may indicate 0 (or may indicate that DCI format 0_0 is uplink DCI format).

The frequency domain resource allocation field contained in DCI format 0_0 may at least be used to indicate the frequency resource allocation for PUSCH.

The time domain resource allocation field contained in DCI format 0_0 may at least be used to indicate the allocation of time resources for PUSCH.

The frequency hopping flag field may at least be used to indicate whether frequency hopping is applied to the PUSCH.

The MCS field contained in DCI format 0_0 may be at least used to indicate the modulation scheme for PUSCH and / or part or all of the target code rate. The target code rate may be the target code rate for the PUSCH transport block. The size of the transport block of the PUSCH (TBS: Transport Block Size) may be given at least based on the target code rate and some or all of the modulation schemes for the PUSCH.

DCI format 0_0 does not have to include the field used for the CSI request (CSI request). That is, the DCI format 0_0 does not have to require CSI.

DCI format 0_0 does not have to include the carrier indicator field. That is, the uplink component carrier in which the PUSCH scheduled by DCI format 0_0 is arranged may be the same as the uplink component carrier in which the PDCCH including the DCI format 0_0 is arranged.

DCI format 0_0 does not have to include the BWP field. That is, the uplink BWP on which the PUSCH scheduled by DCI format 0_0 is arranged may be the same as the uplink BWP on which the PDCCH including the DCI format 0_0 is arranged.

DCI format 0_1 is at least used for scheduling the PUSCH (located in a cell) of a cell. DCI format 0_1 comprises at least some or all of the fields 2A to 2H.
2A) DCI format specific field 2B) Frequency domain resource allocation field 2C) Uplink time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS field 2F) CSI request field
2G) BWP field
2H) Carrier indicator field

The DCI format specific 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 allocation field contained in DCI format 0_1 may at least be used to indicate the frequency resource allocation for PUSCH.

The time domain resource allocation field contained in DCI format 0_1 may at least be used to indicate the allocation of time resources for PUSCH.

The MCS field contained in DCI format 0_1 may be at least used to indicate the modulation scheme for PUSCH and / or part or all of the target code rate.

If the DCI format 0_1 includes a BWP field, the BWP field may be used to indicate the uplink BWP on which the PUSCH is located. If the DCI format 0_1 does not include a BWP field, the uplink BWP in which the PUSCH is located may be the same as the uplink BWP in which the PDCCH containing the DCI format 0_1 used for scheduling the PUSCH is located. When the number of uplink BWPs set in the terminal device 1 in a certain uplink component carrier is 2 or more, the BWP field included in the DCI format 0_1 used for scheduling the PUSCH arranged in the uplink component carrier. The number of bits may be 1 bit or more. When the number of uplink BWPs set in the terminal device 1 in an uplink component carrier is 1, the bits of the BWP field included in DCI format 0_1 used for scheduling the PUSCH arranged in the uplink component carrier. The number may be 0 bits (or the DCI format 0_1 used to schedule the PUSCH placed on the uplink component carrier may not include the BWP field).

The CSI request field is at least used to direct CSI reporting.

If the DCI format 0_1 includes a carrier indicator field, the carrier indicator field may be used to indicate the uplink component carrier on which the PUSCH is located. If DCI format 0_1 does not include a carrier indicator field, the uplink component carrier in which the PUSCH is located is the same as the uplink component carrier in which the PDCCH containing DCI format 0_1 used for scheduling the PUSCH is located. May be good. When the number of uplink component carriers set in the terminal device 1 in a serving cell group is 2 or more (when uplink carrier aggregation is operated in a serving cell group), the PUSCH arranged in the serving cell group The number of bits of the carrier indicator field included in the DCI format 0_1 used for scheduling may be 1 bit or more (for example, 3 bits). When the number of uplink component carriers set in the terminal device 1 in a serving cell group is 1 (when uplink carrier aggregation is not operated in a serving cell group), the PUSCH arranged in the serving cell group is scheduled. The number of bits of the carrier indicator field contained in the DCI format 0_1 used may be 0 bits (or the carrier indicator field is included in the DCI format 0_1 used for scheduling PUSCHs arranged in the serving cell group. It does not have to be).

DCI format 1_0 is at least used for scheduling PDSCH (located in a cell) of a cell. DCI format 1_0 is configured to include at least part or all of 3A to 3F.
3A) DCI format specific field 3B) Frequency domain resource allocation field 3C) Time domain resource allocation field 3D) MCS field 3E) PDSCH_HARQ feedback timing indicator field
3F) PUCCH resource indicator field

The DCI format specific field included in the DCI format 1_0 may indicate 1 (or may indicate that the DCI format 1_0 is the downlink DCI format).

The frequency domain resource allocation field contained in DCI format 1_0 may at least be used to indicate the frequency resource allocation for PDSCH.

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

The MCS field contained in DCI format 1_0 may be at least used to indicate the modulation scheme for PDSCH and / or part or all of the target code rate. The target code rate may be the target code rate for the PDSCH transport block. The size of the transport block for the PDSCH (TBS: Transport Block Size) may be given at least based on the target code rate and some or all of the modulation schemes for the PDSCH.

The PDSCH_HARQ feedback timing indicator field may at least be used to indicate the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH.

The PUCCH resource instruction field may be a field indicating an index of either one or a plurality of PUCCH resources included in the PUCCH resource set. The PUCCH resource set may include one or more PUCCH resources.

DCI format 1_0 does not have to include the carrier indicator field. That is, the downlink component carrier in which the PDSCH scheduled by DCI format 1_0 is arranged may be the same as the downlink component carrier in which the PDCCH including the DCI format 1_0 is arranged.

DCI format 1_0 does not have to include the BWP field. That is, the downlink BWP in which the PDSCH scheduled by DCI format 1_0 is arranged may be the same as the downlink BWP in which the PDCCH including the DCI format 1_0 is arranged.

DCI format 1_1 is at least used for scheduling PDSCH in a cell (or placed in a cell). DCI format 1_1 is configured to include at least some or all of 4A to 4I.
4A) DCI format specific field 4B) Frequency domain resource allocation field 4C) Time domain resource allocation field 4E) MCS field 4F) PDSCH_HARQ feedback timing indication field 4G) PUCCH resource allocation field 4
H) BWP field 4I) Carrier indicator field

The DCI format specific field included in the DCI format 1_1 may indicate 1 (or may indicate that the DCI format 1-11 is the downlink DCI format).

The frequency domain resource allocation field contained in DCI format 1-11 may at least be used to indicate the frequency resource allocation for PDSCH.

The time domain resource allocation field contained in DCI format 1-11 may be at least used to indicate the allocation of time resources for PDSCH.

The MCS field contained in DCI format 1-11 may be at least used to indicate a modulation scheme for PDSCH and / or part or all of the target code rate.

If the DCI format 1-11 includes a PDSCH_HARQ feedback timing indicator field, the PDSCH_HARQ feedback timing indicator field indicates the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH. At least may be used for. If the DCI format 1-11 does not include the PDSCH_HARQ feedback timing indicator field, the offset from the slot containing the last OFDM symbol of the PDSCH to the slot containing the first OFDM symbol of the PUCCH may be specified by the parameters of the upper layer. good.

The PUCCH resource instruction field may be a field indicating an index of either one or a plurality of PUCCH resources included in the PUCCH resource set.

If the DCI format 1-11 includes a BWP field, the BWP field may be used to indicate the downlink BWP in which the PDSCH is located. If the DCI format 1-11 does not include a BWP field, the downlink BWP in which the PDSCH is located may be the same as the downlink BWP in which the PDCCH containing the DCI format 1-11, used for scheduling the PDSCH, is located. When the number of downlink BWPs set in the terminal device 1 in a downlink component carrier is 2 or more, the BWP field included in the DCI format 1-11 used for scheduling the PDSCH arranged in the downlink component carrier. The number of bits may be 1 bit or more. When the number of downlink BWPs set in the terminal device 1 in a downlink component carrier is 1, the bits of the BWP field included in the DCI format 1-11 used for scheduling the PDSCH arranged in the downlink component carrier. The number may be 0 bits (or the DCI format 1-11 used to schedule the PDSCH placed on the downlink component carrier may not include the BWP field).

If the DCI format 1-11 includes a carrier indicator field, the carrier indicator field may be used to indicate the downlink component carrier in which the PDSCH is located. If the DCI format 1-11 does not include a carrier indicator field, the downlink component carrier in which the PDSCH is located is the same as the downlink component carrier in which the PDCCH containing the DCI format 1-11, which is used for scheduling the PDSCH, is located. May be good. When the number of downlink component carriers set in the terminal device 1 in a serving cell group is 2 or more (when downlink carrier aggregation is operated in a serving cell group), the PDSCH arranged in the serving cell group The number of bits of the carrier indicator field included in the DCI format 1-11 used for scheduling may be 1 bit or more (for example, 3 bits). When the number of downlink component carriers set in the terminal device 1 in a serving cell group is 1 (when downlink carrier aggregation is not operated in a serving cell group), the PDSCH arranged in the serving cell group is scheduled. The number of bits of the carrier indicator field included in the DCI format 1-11 used may be 0 bits (or the carrier indicator field is included in the DCI format 1-11 used for scheduling PDSCHs arranged in the serving cell group. It does not have to be).

The PDSCH may be used to transmit the transport block. The PDSCH may be used to transmit the transport block corresponding to the DL-SCH. The PDSCH may be used to transmit the transport block. The PDSCH may be used to transmit the transport block corresponding to the DL-SCH. The transport block may be located on the PDSCH. The transport block corresponding to the DL-SCH may be arranged in the PDSCH. The base station apparatus 3 may transmit a PDSCH. The terminal device 1 may receive the PDSCH.

The downlink physical signal may correspond to a set of resource elements. The downlink physical signal does not have to carry the information generated in the upper layer. The downlink physical signal may be a physical signal used in the downlink component carrier. The 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 embodiment of the present embodiment, at least a part or all of the following downlink physical signals may be used.
-Synchronization signal (SS)
・ DL DMRS (DownLink DeModulation Reference Signal)
・ CSI-RS (Channel State Information-Reference Signal)
・ DL PTRS (DownLink Phase Tracking Reference Signal)

The synchronization signal may be at least used by the terminal device 1 to synchronize the downlink frequency domain and / or the time domain. The synchronization signal is a general term for PSS (PrimarySynchronizationSignal) and SSS (SecondarySynchronizationSignal).

FIG. 7 is a diagram showing a configuration example of the SS / PBCH block according to one aspect of the present embodiment. In FIG. 7, the horizontal axis is the time axis (OFDM symbol index l _sym ), and the vertical axis is the frequency domain. Also, the shaded blocks indicate a set of resource elements for PSS. Also, the grid block shows a set of resource elements for the SSS. Further, the horizontal line block indicates a set of resource elements for PBCH and DMRS for the PBCH (DMRS related to PBCH, DMRS contained in PBCH, DMRS corresponding to PBCH).

As shown in FIG. 7, the SS / PBCH block includes PSS, SSS, and PBCH. Also, the SS / PBCH block contains four consecutive OFDM symbols. The SS / PBCH block contains 240 subcarriers. The PSS is located in the 57th to 183rd subcarriers of the 1st OFDM symbol. The SSS is located in the 57th to 183rd subcarriers of the 3rd OFDM symbol. The 1st to 56th subcarriers of the 1st 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 3rd OFDM symbol may be set to zero. The 184th to 192nd subcarriers of the third OFDM symbol may be set to zero. The PBCH is placed in the subcarriers which are the 1st to 240th subcarriers of the second OFDM symbol and in which the DMRS for the PBCH is not placed. The PBCH is placed in the subcarriers which are the 1st to 48th subcarriers of the 3rd OFDM symbol and in which the DMRS for the PBCH is not placed. The PBCH is placed in the 193rd to 240th subcarriers of the third OFDM symbol and in which the DMRS for the PBCH is not placed. The PBCH is placed in the subcarriers which are the 1st to 240th subcarriers of the 4th OFDM symbol and in which the DMRS for the PBCH is not placed.

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

The PBCH to which the PBCH symbol is transmitted at an antenna port is the DMRS for the PBCH placed in the slot to which the PBCH is mapped and for the PBCH contained in the SS / PBCH block containing the PBCH. It may be estimated by DMRS of.

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

A set of antenna ports for DMRS (DMRS related to PDSCH, DMRS included in PDSCH, DMRS corresponding to PDSCH) for PDSCH may be given based on the set of antenna ports for PDSCH. That is, the set of DMRS antenna ports for the PDSCH may be the same as the set of antenna ports for the PDSCH.

The transmission of the PDSCH and the transmission of the DMRS for the PDSCH may be indicated (or scheduled) in one DCI format. The PDSCH and the DMRS for the PDSCH may be collectively referred to as a PDSCH. Sending a PDSCH may be sending a PDSCH and a DMRS for the PDSCH.

The PDSCH may be estimated from the DMRS for the PDSCH. That is, the propagation path of the PDSCH may be estimated from the DMRS for the PDSCH. If a set of resource elements to which a PDSCH symbol is transmitted and a set of resource elements to which a DMRS symbol for the PDSCH is transmitted are included in the same precoding resource group (PRG). In some cases, the PDSCH to which the PDSCH symbol is transmitted at an antenna port may be estimated by the DMRS for the PDSCH.

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

The PDCCH may be estimated from the DMRS for the PDCCH. That is, the propagation path of the PDCCH may be estimated from the DMRS for the PDCCH. If the same precoder is applied (assumed to be applied) in a set of resource elements to which a PDCCH symbol is transmitted and a set of resource elements to which a DMRS symbol for the PDCCH is transmitted. If applicable), the PDCCH to which the PDCCH symbol is transmitted at an antenna port may be estimated by DMRS for the PDCCH.

BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel) and DL-SCH (Downlink-Shared CHannel) are transport channels. The channels used in the MAC layer are called transport channels. The unit of the transport channel used in the MAC layer is also called a transport block (TB) or a MAC PDU (Protocol Data Unit). HARQ (Hybrid Automatic Repeat reQuest) is controlled for each transport block in the MAC layer. A transport block is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, the transport block is mapped to a codeword, and modulation processing is performed for each codeword.

One UL-SCH and one DL-SCH may be given for each serving cell. BCH may be given to PCell. BCH does not have to be given to PSCell and SCell.

BCCH (BroadcastControlCHannel), CCCH (CommonControlCHannel), and DCCH (DedicatedControlCHannel) are logical channels. For example, BCCH is a MIB or RRC layer channel used to transmit system information. Further, CCCH (Common Control CHannel) may be used to transmit a common RRC message in a plurality of terminal devices 1. Here, CCCH may be used, for example, for a terminal device 1 that is not RRC-connected. Further, the DCCH (Dedicated Control CHannel) may be at least used for transmitting a dedicated RRC message to the terminal device 1. Here, the DCCH may be used, for example, for the terminal device 1 connected by RRC.

The RRC message contains one or more RRC parameters (information elements). For example, the RRC message may include a MIB. The RRC message may also include system information. Further, the RRC message may include a message corresponding to CCCH. Further, the RRC message may include a message corresponding to the DCCH. An RRC message containing a message corresponding to a DCCH is also referred to as an individual RRC message.

BCCH in the logical channel may be mapped to BCH or DL-SCH in the transport channel. CCCH on the logical channel may be mapped to DL-SCH or UL-SCH on the transport channel. DCCH in the logical channel may be mapped to DL-SCH or UL-SCH in the transport channel.

UL-SCH in the transport channel may be mapped to PUSCH in the physical channel. The DL-SCH in the transport channel may be mapped to the PDSCH in the physical channel. BCH in the transport channel may be mapped to PBCH in the physical channel.

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

The procedure performed by the terminal device 1 includes at least a part or all of the following 5A to 5C.
5A) cell search
5B) Random access
5C) data communication

Cell search is a procedure used for detecting a physical cell ID (physical cell identity) by synchronizing a cell with respect to a time domain and a frequency domain by the terminal device 1. That is, the terminal device 1 may detect the physical cell ID by synchronizing the time domain and the frequency domain with a certain cell by cell search.

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

The SS / PBCH block candidate indicates a resource for which transmission of the SS / PBCH block is permitted (possible, reserved, set, specified, and possible).

The set of SS / PBCH block candidates in a certain half radio frame is also called an SS burst set (SS burst set). The SS burst set is also referred to as a transmission window (transmission window), an SS transmission window (SS transmission window), or a DRS transmission window (Discovery Reference Signal transmission window). The SS burst set is a general term including at least a first SS burst set and a second SS burst set.

The base station device 3 transmits one or a plurality of index SS / PBCH blocks at a predetermined cycle. The terminal device 1 may detect at least one SS / PBCH block of the SS / PBCH block of the one or more indexes and try to decode the PBCH contained in the SS / PBCH block.

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

Message 1 is a procedure in which PRACH is transmitted by the terminal device 1. The terminal device 1 transmits PRACH at one PRACH opportunity selected from one or more PRACH opportunities based on at least the index of SS / PBCH block candidates detected based on the cell search. Each PRACH opportunity is defined based on at least time-domain and frequency-domain resources.

The terminal device 1 transmits one random access preamble selected from the PRACH opportunities corresponding to the index of the SS / PBCH block candidate in which the SS / PBCH block is detected.

Message 2 is a procedure for attempting to detect DCI format 1_0 accompanied by CRC (Cyclic Redundancy Check) scrambled by RA-RNTI (Random Access-Radio Network Temporary Identifier) by the terminal device 1. The terminal device 1 includes the DCI format in the control resource set given based on the MIB included in the PBCH included in the SS / PBCH block detected based on the cell search, and the resource indicated based on the setting of the search area set. Attempts to detect PDCCH. Message 2 is also referred to as a random access response.

Message 3 is a procedure for transmitting a PUSCH scheduled by a random access response grant included in DCI format 1_0 detected by the message 2 procedure. Here, 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 message 3 PUSCH or PUSCH. Message 3 PUSCH includes a collision resolution identifier (contention resolution identifier) MAC CE. Conflict resolution ID MAC CE includes a conflict resolution ID.

Message 3 PUSCH retransmission is scheduled by DCI format 0_0 with CRC scrambled based on TC-RNTI (Temporary Cell-Radio Network Temporary Identifier).

Message 4 is a procedure for attempting to detect DCI format 1_0 with CRC scrambled based on either C-RNTI (Cell-Radio Network Temporary Identifier) or TC-RNTI. The terminal device 1 receives the PDSCH scheduled based on the DCI format 1_0. The PDSCH may include a conflict resolution ID.

Data communication is a general term for downlink communication and uplink communication.

In data communication, the terminal device 1 attempts to detect PDCCH in the control resource set and the resource specified based on the search area set (monitors PDCCH, monitors PDCCH).

The control resource set is a set of resources composed of a predetermined number of resource blocks and a predetermined number of OFDM symbols. In the frequency domain, the control resource set may be composed of continuous resources (non-interleaved mapping) or distributed resources (interleaver mapping).

The set of resource blocks that make up the control resource set may be indicated by the upper layer parameters. The number of OFDM symbols that make up the control resource set may be indicated by the upper layer parameters.

The terminal device 1 attempts to detect PDCCH in the search area set. Here, attempting to detect PDCCH in the search area set may be attempting to detect PDCCH candidates in the search area set, or may be attempting to detect the DCI format in the search area set. However, the PDCCH may be detected in the control resource set, the PDCCH candidate may be detected in the control resource set, or the DCI format may be detected in the control resource set. There may be.

The search area set is defined as a set of PDCCH candidates. The search area set may be a CSS (Common Search Space) set or a USS (UE-specific Search Space) set. The terminal device 1 includes a type 0PDCCH common search area set (Type0PDCCH common search space set), a type 0aPDCCH common search area set (Type0a PDCCH common search space set), and a type 1 PDCCH common search area set (Type1 PDCCH common search space set). One of the type 2 PDCCH common search area set (Type2 PDCCH common search space set), the type 3 PDCCH common search area set (Type3 PDCCH common search space set), and / or the UE individual PDCCH search area set (UE-specific search space set). Attempts to detect PDCCH candidates in part or all.

The type 0PDCCH common search area set may be used as the common search area set of index 0. The type 0PDCCH common search area set may be a common search area set with index 0.

The CSS set is a general term for a type 0PDCCH common search area set, a type 0aPDCCH common search area set, a type 1PDCCH common search area set, a type 2PDCCH common search area set, and a type 3PDCCH common search area set. The USS set is also referred to as a UE individual PDCCH search area set.

A search area set is related (included, corresponding) to a control resource set. The index of the control resource set associated with the search area set may be indicated by the upper layer parameters.

For a set of search regions, some or all of 6A to 6C may be indicated by at least upper layer parameters.
6A) PDCCH monitoring periodicity
6B) PDCCH monitoring pattern within a slot
6C) PDCCH monitoring offset

The monitoring opportunity of a certain search area set may correspond to an OFDM symbol in which the first OFDM symbol of the control resource set related to the certain search area set is arranged. The monitoring opportunity for a search region set may correspond to the resources of that control resource set starting with the OFDM symbol at the beginning of the control resource set associated with the search region set. The monitoring opportunity for the search region set is given at least based on the PDCCH monitoring interval, the PDCCH monitoring pattern in the slot, and some or all of the PDCCH monitoring offsets.

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

In FIG. 8, the block indicated by the grid line indicates the search area set 91, the block indicated by the upward-sloping diagonal line indicates the search area set 92, and the block indicated by the upward-sloping diagonal line indicates the search area set 93, which is indicated by a horizontal line. The block shown shows the search area set 94.

The monitoring interval of the search area set 91 is set to 1 slot, the monitoring offset of the search area set 91 is set to 0 slot, and the monitoring pattern of the search area set 91 is [1,0,0,0,0,0, It is set to 0,1,0,0,0,0,0,0]. That is, the monitoring opportunity of the search region set 91 corresponds to the first OFDM symbol (OFDM symbol # 0) and the eighth OFDM symbol (OFDM symbol # 7) in each of the slots.

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

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

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

The type 0PDCCH common search area set may be at least used for DCI formats with CRC (Cyclic Redundancy Check) sequences scrambled by SI-RNTI (System Information-Radio Network Temporary Identifier).

The type 0aPDCCH common search area set may be at least used for DCI formats with CRC (Cyclic Redundancy Check) sequences scrambled by SI-RNTI (System Information-Radio Network Temporary Identifier).

The type 1 PDCCH common search area set is a CRC sequence scrambled by RA-RNTI (Random Access-Radio Network Temporary Identifier) and / or a CRC sequence scrambled by TC-RNTI (Temporary Cell-Radio Network Temporary Identifier). It may be at least used for the accompanying DCI format.

The Type 2 PDCCH common search region set may be used for DCI formats with CRC sequences scrambled by P-RNTI (Paging-Radio Network Temporary Identifier).

The Type 3 PDCCH common search region set may be used for DCI formats with CRC sequences scrambled by C-RNTI (Cell-Radio Network Temporary Identifier).

The UE individual PDCCH search region set may be at least used for DCI formats with CRC sequences scrambled by C-RNTI.

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

In uplink communication, the terminal device 1 detects the uplink DCI format. The detected DCI format is at least used for PUSCH resource allocation. The detected uplink DCI format is also referred to as an uplink grant. The terminal device 1 transmits the PUSCH.

In the configured scheduling, the uplink grant that schedules the PUSCH is set for each transmission cycle of the PUSCH. If the PUSCH is scheduled by the uplink DCI format, some or all of the information presented by the uplink DCI format may be presented by the uplink grant set in the case of the configured scheduling.

The terminal device 1 may be given one or more PUCCH resources by the upper layer. The terminal device 1 may be allocated one or more PUCCH resources for one PUCCH transmission. The PUCCH resource may be an element containing a part or all of the elements P1 to P5. P1) Index of PUCCH format P2) Index of OFDM symbol at the beginning of PUCCH P3) Number of OFDM symbols of PUCCH P4) Index of resource block at the beginning of PUCCH P5) Number of resource blocks of PUCCH M ^PUCCH _RB

For example, one PUCCH transmission may be a PUCCH transmission triggered by one DCI.

The PUCCH format index may indicate any value from PUCCH format 0 to PUCCH format 4. The index in PUCCH format may be specified by the upper layer parameter format. For example, when the format is format 0 (or PUCCH-format 0), the PUCCH may correspond to the PUCCH format 0. When the format is format 1 (or PUCCH-format 1), the PUCCH may correspond to the PUCCH format 1. When the format is format 2 (or PUCCH-format 2), the PUCCH may correspond to the PUCCH format 2. When the format is format 3 (or PUCCH-format 3), the PUCCH may correspond to the PUCCH format 3. When the format is format 4 (or PUCCH-format 4), the PUCCH may correspond to the PUCCH format 4.

For example, corresponding to a certain PUCCH format may mean that the certain PUCCH is configured by the certain PUCCH format. Further, corresponding to a certain PUCCH format may be that the certain PUCCH is generated based on the certain PUCCH format. Here, the PUCCH format includes at least a part or all of the PUCCH scrambling method, the PUCCH modulation method setting, the PUCCH time domain resource setting, the PUCCH frequency domain setting, and the DMRS setting for the PUCCH. But it may be.

The index of the first OFDM symbol of the PUCCH may be the index of the first OFDM symbol to which the PUCCH is mapped. The index of the OFDM symbol at the beginning of the PUCCH may be determined by the upper layer parameter startingSymbolIndex corresponding to the PUCCH format selected by the PUCCH format index.

The number of OFDM symbols of PUCCH may be the number of OFDM symbols to which PUCCH is mapped. The number of OFDM symbols in PUCCH may be determined by the upper layer parameter nrovsymbols corresponding to the PUCCH format selected by the PUCCH format index.

Number of resource blocks in PUCCH M ^PUCCH _RB may be the maximum number of resource blocks to which PUCCH is mapped. The number of resource blocks of the PUCCH M ^PUCCH _RB may be determined by the upper layer parameter nrolfPRBs corresponding to the PUCCH format selected by the PUCCH format index.

Number of resource blocks of PUCCH M ^PUCCH _{RB, min} may be the number of resource blocks to which PUCCH is mapped. The number of PUCCH resource blocks M ^PUCCH _{RB , min} may be the same as the number of PUCCH resource blocks M ^PUCCH _RB or less than the number of PUCCH resource blocks M ^PUCCH RB.

The number of resource blocks in the PUCCH M ^PUCCH _{RB, min} is a formula if the PUCCH format for the PUCCH is PUCCH format 2 or PUCCH format 3 and the PUCCH contains at least one or both of HARQ-ACK and SR. 1 and / or may be determined based on at least Equation 2. The number of resource blocks M ^PUCCH _{RB, min} of the PUCCH may be determined at least based on both Equation 1 and Equation 2 based at least on the basis that the number M ^PUCCH _RB of the PUCCH resource blocks is greater than 1.

The _NUCI may correspond to the number of uplink control information bits.

N ^RB _{SC, CTRL} may be determined based on the number of subcarriers per resource block N ^RB _SC . NRB _{SC, CTRL} for PUCCH format 2 may be given in ^NRB _{SC, CTRL} -4, or ( ^NRB _{SC, CTRL} -4) / N ^{PUCCH , 2} _SF . NRB _{SC, CTRL} for PUCCH format 3 may be given in ^NRB _{SC, CTRL, or NRB} ^SC _{, CTRL} / N ^{PUCCH , 3} _SF . N ^{PUCCH, 2} _SF may be a value used for spreading in PUCCH 2, and N ^{PUCCH, 3} _SF may be a value used for block-by-block spreading in PUCCH 3.

The N ^PUCCH _symb-UCI may correspond to the number of OFDM symbols to which the PUCCH is mapped. The N ^PUCCH _symb-UCI for PUCCH format 2 may be given by nrovSymbols in the upper layer parameter PUCCH-from2. The N ^PUCCH _symb-UCI for PUCCH format 3 is the value given by nrovSymbols in the upper layer parameter PUCCH-format3 minus the number of OFDM symbols used in the DMRS transmission for the PUCCH format 3. May be good. The N ^PUCCH _symb-UCI for PUCCH format 4 is the value given by nrovSymbols in the upper layer parameter PUCCH-format4 minus the number of OFDM symbols used in the DMRS transmission for the PUCCH format 4. May be good.

Q _m may correspond to the modulation order of PUCCH.

R may correspond to the maximum code rate of PUCCH (or simply referred to as the code rate). r may be determined by the upper layer parameter maxCodeRate for PUCCH formats 2, 3 or 4.

In PUCCH formats 1, 3, or 4, the number of slots N ^repeat _PUCCH may be set for repeated PUCCH transmissions. N ^repeat _PUCCH may be determined by the upper layer parameter nrovSlots for PUCCH.

The terminal device 1 may repeat the PUCCH transmission including the UCI in the N ^repeat _PUCCH slot, at least based on the fact that the N ^repeat _PUCCH is greater than 1. PUCCH transmissions in each of the N ^repeat _PUCCH slots may have the same number of OFDM symbols or may have the same index of leading OFDM symbols. The number of OFDM symbols may be given by the upper layer parameter norfSymbols corresponding to the PUCCH format selected by the PUCCH format index. The index of the leading OFDM symbol may be given by the upper layer parameter startingSymbolIndex corresponding to the PUCCH format selected by the PUCCH format index.

The PUCCH corresponding to the PUCCH formats 1, 3, or 4 may be configured to perform frequency hopping between different slots, at least based on repeated transmissions of the PUCCH in the ^Spread _PUCCH slot. The frequency hopping may be performed slot by slot, the PUCCH may be transmitted based on the first PRB in the even-numbered slots, and the PUCCH may be transmitted based on the second PRB in the odd-numbered slots. May be done. The first PRB may be given by the upper layer parameter Starting PRB, and the second PRB may be given by the upper layer parameter SecondHop PRB. With the slot designated for the first transmission of the PUCCH as the 0th slot, each subsequent slot until the PUCCH is transmitted in the N ^repeat _PUCCH slot is irrespective of whether or not the terminal device 1 transmits the PUCCH. It may be counted.

The terminal device 1 is set to perform frequency hopping between different slots for PUCCH transmission, at least in a slot, based on the fact that PUCCH transmission including UCI is repeated in the ^Spread _PUCCH slot. You do not have to expect frequency hopping to be performed for PUCCH transmission.

Repeated PUCCH transmission including UCI in the N ^repeat _PUCCH slot, no setting to perform frequency hopping between different slots for PUCCH transmission, and frequency hopping in the slot for PUCCH transmission. The frequency hopping from the first PRB given by the upper layer parameter Starting PRB to the second PRB given by the upper layer parameter SecondHop PRB may be the same in each slot, at least based on what is set to perform. ..

FIG. 9 is a diagram showing an example in which the DCI format according to one aspect of the present embodiment instructs PUCCH transmission in each of the two slots. In the downlink BWP in the downlink carrier 900, the PDCCH 910 is transmitted in the slot 930. According to the DCI format instruction included in the PDCCH 910, the PUCCH 920 is transmitted in the slot 931 and the PUCCH 921 is transmitted in the slot 932 in the uplink BWP in the uplink 901.

The DCI format included in the PDCCH 910 may direct the transmission of the PUCCH 920 and the transmission of the PUCCH 921 based on at least the fields 7A or 7B in the DCI format.
7A) Multiple PUCCH resource instruction fields and multiple PDSCH_HARQ feedback timing instruction fields 7B) Fields that instruct one PUCCH transmission to be repeated for each unit of one slot or less.

For example, in field 7A within the DCI format, the DCI format may include a first PDSCH_HARQ feedback timing instruction field and a second PDSCH_HARQ feedback timing instruction field. The DCI format may also include a first PUCCH resource indicator field and a second PUCCH resource indicator field. In the first slot indicated by the first PDSCH_HARQ feedback timing indicator field, the first PUCCH resource indicator field may indicate a first PUCCH resource for PUCCH transmission. Further, in the second slot indicated by the second PDSCH_HARQ feedback timing instruction field, the second PUCCH resource instruction field may indicate the second PUCCH resource for the PUCCH transmission. The first slot and the second slot may be different slots. Further, the first slot and the second slot may be the same slot.

For example, slot 931 and slot 932 may be arranged continuously. Further, the slot 931 and the slot 932 may be arranged discontinuously. Further, slot 931 and slot 932 may be the same slot. The transmission of PUCCH920 and the transmission of PUCCH921 may be continuous on the time axis. The instructed PUCCH transmission may be a Nominal PUCCH transmission.

PUCCH921 may be referred to as a repetition of PUCCH920. That is, the same UCI may be transmitted on PUCCH921 and PUCCH920. Alternatively, one UCI may be divided into a first UCI and a second UCI, the PUCCH 920 may include the first UCI and the PUCCH 921 may include the second UCI.

The repetition of PUCCH may be the repetition of UCI. For example, the same sequence of UCI coding bits may be mapped to PUCCH921 and PUCCH920, respectively. For example, the first portion of the sequence of coded bits of the same UCI may be mapped to PUCCH921 and the second portion of the sequence of coded bits may be mapped to PUCCH920. Here, the coding bit of at least one bit included in the first part may be a bit different from all the coding bits included in the second part.

The PUCCH repeat specified by the DCI format may be a nominal repeat. In the nominal PUCCH iteration, the resource for the PUCCH may be repeated continuously. Further, the nominal PUCCH repeat time position may be different from the actual PUCCH repeat time position. The actual PUCCH repeat may be mapped to a subsequent valid OFDM symbol if the nominal PUCCH repeat is mapped to a non-valid OFDM symbol. For example, an OFDM symbol containing an SS / PBCH block is an OFDM symbol that is not valid for PUCCH transmission. That is, the actual PUCCH iteration may consist of a contiguous set of valid OFDM symbols.

The number of OFDM symbols to which PUCCH920 is mapped may differ from the number of OFDM symbols to which PUCCH921 is mapped.

As shown in FIG. 9, in order to solve the case where the number of resource blocks of PUCCH920 and PUCCH921 may be different and to perform efficient communication, the number of one resource block is determined for PUCCH920 and PUCCH921. The means 1 and the means 2 to be used will be described.

In means 1, the terminal device 1 may determine the number of resource blocks M ^PUCCH _{RB, min} corresponding to PUCCH 920 based on at least Equation 1 and / or Equation 2, and the number of resource blocks corresponding to PUCCH 921. M ^PUCCH _{RB, min} may be determined based on at least Equation 1 and / or Equation 2. Further, any one of the number of resource blocks M ^PUCCH _{RB, min} corresponding to the PUCCH 920 and the number of resource blocks M ^PUCCH _{RB, min} corresponding to the PUCCH 921 is defined as the number of one resource block. The number of the one resource blocks is the number of resource blocks to which the PUCCH 920 is mapped and the number of resource blocks to which the PUCCH 921 is mapped. For example, in the means 1, the terminal device 1 has the number of resource blocks corresponding to the PUCCH 920, M ^PUCCH _{RB, min} , and the number of resource blocks corresponding to the PUCCH 921, M ^PUCCH _{RB, min} . May be determined.

For example, in the means 1, the terminal device 1 may use the smaller of the number of resource blocks corresponding to the PUCCH 920 and the number of resource blocks corresponding to the PUCCH 921 M ^PUCCH _{RB, min} as the number of the one resource block. good. Further, the terminal device 1 may use the larger of the number of resource blocks corresponding to the PUCCH 920 and the number of resource blocks corresponding to the PUCCH 921 M ^PUCCH _{RB, min} as the number of the one resource block.

In means 2, the terminal device 1 may select either PUCCH920 or PUCCH921 as one PUCCH. Further, the terminal device 1 may determine the number of resource blocks corresponding to the one PUCCH, M ^PUCCH _{RB, min} , as the number of one resource block, based on at least the formula 1 and / or the formula 2. .. The number of the one resource blocks is the number of resource blocks to which the PUCCH 920 is mapped and the number of resource blocks to which the PUCCH 921 is mapped.

For example, in the means 2, the terminal device 1 uses the PUCCH having the larger number of OFDM symbols among the number of OFDM symbols corresponding to the PUCCH 920 and the number of OFDM symbols corresponding to the PUCCH 921 as the one PUCCH. , May be selected. Further, the terminal device 1 selects the PUCCH having the smaller number of OFDM symbols among the number of OFDM symbols corresponding to the PUCCH 920 and the number of OFDM symbols corresponding to the PUCCH 921 as the one PUCCH. May be good.

The number of OFDM symbols corresponding to PUCCH920 and the number of OFDM symbols corresponding to PUCCH921 may be given by the upper layer parameter.

Hereinafter, aspects of various devices according to one aspect of the present embodiment will be described.

(1) In order to achieve the above object, the following means have been taken in the aspect of the present invention. That is, the first aspect of the present invention is a terminal device, comprising a receiving unit for receiving a PDCCH including a DCI format, and a transmitting unit for transmitting at least a first PUCCH and a second PUCCH. When the DCI format directs the transmission of the first PUCCH and the transmission of the second PUCCH, the number of resource blocks to which the first PUCCH and the second PUCCH are mapped is the number of one resource block. The number of first resource blocks is determined as the UCI of the first PUCCH, the modulation order of the modulation scheme for the first PUCCH, and the maximum set for the first PUCCH format. The conditional expression is satisfied at least based on the coding rate, the number of subcarriers per resource block, and the number of OFDM symbols to which the first PUCCH is mapped, and the number of the second resource blocks is the second. PUCCH UCI, the modulation order of the modulation scheme for the second PUCCH, the maximum coding rate set for the second PUCCH format, the number of subcarriers per resource block, and the above. The smaller of the number of the first resource blocks and the number of the second resource blocks is the one that satisfies at least the conditional expression based on the number of OFDM symbols to which the second PUCCH is mapped. Determined as the number of resource blocks. In the first aspect, the conditional expression may be formula 1 and / or formula 2. In a first aspect, the first UCI and the second UCI may be the same UCI, or one UCI may be divided into the first UCI and the second UCI. ..

(2) Further, the second aspect of the present invention is a terminal device, comprising a receiving unit for receiving PDCCH including the DCI format, and a transmitting unit for transmitting at least the first PUCCH and the second PUCCH. When the DCI format directs transmission of the first PUCCH and transmission of the second PUCCH, the number of resource blocks to which the first PUCCH and the second PUCCH are mapped is one resource block. One PUCCH having the larger number of OFDMs among the number of OFDM symbols to which the first PUCCH is mapped and the number of OFDM symbols to which the second PUCCH is mapped is determined as the number of OFDM symbols. It is selected and the number of the one resource block is determined based on the one PUCCH. In the second aspect, the number of the one resource block may be determined in the one PUCCH using Equation 1 and / and Equation 2.

(3) Further, a third aspect of the present invention is a base station apparatus, in which a transmission unit that transmits a PDCCH including a DCI format, a reception unit that receives at least a first PUCCH and a second PUCCH, and a reception unit. When the DCI format directs transmission of the first PUCCH and transmission of the second PUCCH, the number of resource blocks to which the first PUCCH and the second PUCCH are mapped is one. Determined as the number of resource blocks, the number of first resource blocks is relative to the UCI of the first PUCCH, the modulation order of the modulation scheme for the first PUCCH, and the first PUCCH format. The number of second resource blocks satisfies at least a conditional expression based on the maximum coding rate to be set, the number of subcarriers per resource block, and the number of OFDM symbols to which the first PUCCH is mapped. , The UCI of the second PUCCH, the modulation order of the modulation scheme for the second PUCCH, the maximum coding rate set for the second PUCCH format, and the subcarriers for each resource block. Satisfying at least a conditional expression based on the number and the number of OFDM symbols to which the second PUCCH is mapped, the smaller of the number of the first resource blocks and the number of the second resource blocks. Is determined as the number of one resource block. In the first aspect, the conditional expression may be formula 1 and / or formula 2. In a first aspect, the first UCI and the second UCI may be the same UCI, or one UCI may be divided into the first UCI and the second UCI.

(4) Further, a fourth aspect of the present invention is a base station apparatus, which comprises a transmitting unit for transmitting a PDCCH including a DCI format and a receiving unit for receiving at least a first PUCCH and a second PUCCH. When the DCI format instructs the transmission of the first PUCCH and the transmission of the second PUCCH, the number of resource blocks to which the first PUCCH and the second PUCCH are mapped is one resource. One PUCCH having the larger number of OFDMs among the number of OFDM symbols determined as the number of blocks and to which the first PUCCH is mapped and the number of OFDM symbols to which the second PUCCH is mapped. Is selected, and the number of the one resource block is determined based on the one PUCCH. In the second aspect, the number of the one resource block may be determined in the one PUCCH using Equation 1 and / and Equation 2.

The program operating on the base station device 3 and the terminal device 1 according to one aspect of the present invention controls a CPU (Central Processing Unit) or the like so as to realize the functions of the above embodiment according to one aspect of the present invention. It may be a program (a program that makes a computer function). Then, the information handled by these devices is temporarily stored in RAM (RandomAccessMemory) at the time of processing, and then stored in various ROMs such as Flash ROM (ReadOnlyMemory) and HDD (HardDiskDrive). It is read, corrected and written by the CPU as needed.

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

The "computer system" here is a computer system built in the terminal device 1 or the base station device 3, and includes hardware such as an OS and peripheral devices. Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, and a storage device such as a hard disk built in a computer system.

Further, a "computer-readable recording medium" is a medium that dynamically holds a program for a short time, such as a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In that case, a program may be held for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client. Further, the above-mentioned program may be for realizing a part of the above-mentioned functions, and may be further realized for realizing the above-mentioned functions in combination with a program already recorded in the computer system.

Further, the base station device 3 in the above-described embodiment can also be realized as an aggregate (device group) composed of a plurality of devices. Each of the devices constituting the device group may include a part or all of each function or each function block of the base station device 3 according to the above-described embodiment. As the device group, it suffices to have each function or each function block of the base station device 3. Further, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as an aggregate.

Further, the base station apparatus 3 in the above-described embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or NG-RAN (NextGen RAN, NR RAN). Further, the base station apparatus 3 in the above-described embodiment may have a part or all of the functions of the upper node with respect to the eNodeB and / or the gNB.

Further, a part or all of the terminal device 1 and the base station device 3 in the above-described embodiment may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of making an integrated circuit is not limited to the LSI, and may be realized by a dedicated circuit or a general-purpose processor. Further, when an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology, it is also possible to use an integrated circuit based on this technology.

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

As described above, the embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like within a range not deviating from the gist of the present invention are also included. Further, one aspect of the present invention can be variously modified within the scope of the claims, and the technical embodiment of the present invention can also be obtained by appropriately combining the technical means disclosed in the different embodiments. Included in the range. Further, the elements described in each of the above-described embodiments are included, and a configuration in which elements having the same effect are replaced with each other is also included.

One aspect of the present invention is used in, for example, a communication system, a communication device (for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), a program, or the like. be able to.

1 (1A, 1B, 1C) Terminal device 3 Base station device 10, 30 Wireless transmission / reception section 10a, 30a Wireless transmission section 10b, 30b Wireless reception section 11, 31 Antenna section 12, 32 RF section 13, 33 Baseband section 14, 34 Upper layer processing unit 15, 35 Media access control layer processing unit 16, 36 Wireless resource control layer processing unit 91, 92, 93, 94 Search area set 300 Component carrier 301 Primary cell 302, 303 Secondary cell 3000 points 3001, 3002 Resources Grid 3003, 3004 BWP
3011, 3012, 3013, 3014 Offset 3100, 3200 Common resource block set 900 Downlink carrier 901 Uplink carrier 910 PDCCH
920, 921 PUCCH
930, 931, 932 slots

Claims (7)

1. A receiver that receives the DCI format included in the PDCCH,
   A transmitter that transmits at least a first PUCCH and a second PUCCH.
   The DCI format directs transmission of the first PUCCH containing a first UCI and transmission of the second PUCCH containing a second UCI.
   The first UCI is the first part of a sequence of coding bits for one UCI.
   The second UCI is a second part of the sequence of coding bits.
   At least one coding bit included in the first portion is the same as some coding bits contained in the second portion, or all codes included in the second portion. A terminal device that is different from the conversion bit.
2. The number of resource blocks to which the first PUCCH and the second PUCCH are mapped is determined as the number of one resource block.
   The number of first resource blocks includes the first UCI, the modulation order of the modulation scheme for the first PUCCH, the maximum code rate set for the first PUCCH format, and the resources. Satisfy at least a condition based on the number of subcarriers per block and the number of OFDM symbols to which the first PUCCH is mapped.
   The number of second resource blocks includes the second UCI, the modulation order of the modulation scheme for the second PUCCH, the maximum code rate set for the second PUCCH format, and the resources. Satisfy at least a condition based on the number of subcarriers per block and the number of OFDM symbols to which the second PUCCH is mapped.
   The terminal device according to claim 1, wherein the smaller of the number of the first resource blocks and the number of the second resource blocks is determined as the number of the one resource blocks.
3. The number of resource blocks to which the first PUCCH and the second PUCCH are mapped is determined as the number of one resource block.
   The number of the one resource block is the number of the first OFDM symbols for the first PUCCH and the number of the second OFDM symbols for the second PUCCH, whichever is larger. The terminal device according to claim 1, which is determined based on at least a number.
4. A transmitter that transmits the DCI format included in the PDCCH,
   A receiver that receives at least a first PUCCH and a second PUCCH is provided.
   The DCI format directs transmission of the first PUCCH containing a first UCI and transmission of the second PUCCH containing a second UCI.
   The first UCI is the first part of a sequence of coding bits for one UCI.
   The second UCI is a second part of the sequence of coding bits.
   At least one coding bit included in the first portion is the same as some coding bits contained in the second portion, or all codes included in the second portion. Base station equipment different from the coded bit.
5. The number of resource blocks to which the first PUCCH and the second PUCCH are mapped is determined as the number of one resource block.
   The number of first resource blocks includes the first UCI, the modulation order of the modulation scheme for the first PUCCH, the maximum code rate set for the first PUCCH format, and the resources. Satisfy at least a condition based on the number of subcarriers per block and the number of OFDM symbols to which the first PUCCH is mapped.
   The number of second resource blocks includes the second UCI, the modulation order of the modulation scheme for the second PUCCH, the maximum code rate set for the second PUCCH format, and the resources. Satisfy at least a condition based on the number of subcarriers per block and the number of OFDM symbols to which the second PUCCH is mapped.
   The base station apparatus according to claim 4, wherein the smaller of the number of the first resource blocks and the number of the second resource blocks is determined as the number of the one resource blocks.
6. The number of resource blocks to which the first PUCCH and the second PUCCH are mapped is determined as the number of one resource block.
   The number of the one resource block is the number of the first OFDM symbols for the first PUCCH and the number of the second OFDM symbols for the second PUCCH, whichever is larger. The base station apparatus according to claim 4, which is determined based on at least a number.
7. It is a communication method used for terminal devices.
   Steps to receive the DCI format contained in the PDCCH,
   A step of transmitting at least a first PUCCH and a second PUCCH.
   The DCI format directs transmission of the first PUCCH containing a first UCI and transmission of the second PUCCH containing a second UCI.
   The first UCI is the first part of a sequence of coding bits for one UCI.
   The second UCI is a second part of the sequence of coding bits.
   At least one coding bit included in the first portion is the same as some coding bits contained in the second portion, or all codes included in the second portion. Communication method different from the conversion bit.

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