JP7245109B2 - TERMINAL DEVICE, BASE STATION DEVICE, AND COMMUNICATION METHOD - Google Patents

Description

The present invention relates to a terminal device, a base station device, and a communication method.

Radio access schemes and radio networks for cellular mobile communications (hereinafter referred to as "Long Term Evolution (LTE)" or "EUTRA: Evolved Universal Terrestrial Radio Access".) is a third generation partnership project (3GPP: 3 ^rd Generation Partnership Project). In LTE, a base station device is also called eNodeB (evolved NodeB), and a terminal device is also called UE (User Equipment). LTE is a cellular communication system in which a plurality of areas covered by base station devices are arranged in a cell. A single base station device may manage multiple serving cells.

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

"New SID proposal: Study on New Radio Access Technology", RP-160671, NTT docomo, 3GPP TSG RAN Meeting #71, Goteborg, Sweden, 7th - 10th March, 2016.

The present invention provides a terminal device that communicates efficiently, a communication method used in the terminal device, a base station device that communicates efficiently, and a communication method used in the base station device.

(1) A first aspect of the present invention is a terminal device, which is included in the n-th SS/PBCH block of an SS burst set configured by Y SS/PBCH candidates included in a half radio frame. and a higher layer processing unit for setting a first monitoring opportunity for a first search area set in a first slot based at least on fields included in the PBCH, wherein the SS The initial value of the period of the burst set corresponds to N _burst times the half radio frame, and the offset from the second slot, which is the first slot of the system frame with index j, to said first slot is O*2. ^μ, said O is given based at least on said PBCH, candidate values for said O correspond to integer multiples of the number of subframes included in said half radio frame, and range from 0 to (N _burst -1 )*5, and the μ is given based on the setting of the subcarrier spacing of the PBCH.

(2) A second aspect of the present invention is a terminal device, and out of the SS burst set composed of Y SS/PBCH candidates included in the half radio frame, the n-th SS/PB
a receiving unit for receiving a PBCH included in a CH block; and a higher layer processing unit for setting a first monitoring opportunity for a first search area set based at least on fields included in the PBCH, wherein the SS burst If the set is the first SS burst set, the upper layer processing unit sets the first monitoring occasion based on fields included in the SS/PBCH block, and the SS burst set is the second SS if it is a burst set, said field does not indicate the setting of said search area set and said field indicates that there is a cell-defined SS/PBCH block on the same center frequency as said SS/PBCH block; A defined SS/PBCH block indicates the configuration of the first monitoring occasion.

(3) A third aspect of the present invention is a base station apparatus, and in an SS burst set composed of Y SS/PBCH candidates included in a half radio frame, in the n-th SS/PBCH block a transmitting unit for transmitting a PBCH included; and a higher layer processing unit for setting a first monitoring opportunity for a first search area set in a first slot based at least on fields included in the PBCH, said The initial value of the period of the SS burst set corresponds to N _burst times the half radio frame, and the offset from the second slot, which is the first slot of the system frame with index j, to said first slot is O*. 2^μ, said O is given based at least on said PBCH, candidate values for said O correspond to integer multiples of the number of subframes included in said half radio frame, and range from 0 to (N _burst - 1) including at least a value included in the range of *5, wherein μ is given based on the setting of the subcarrier spacing of the PBCH;

(4) A fourth aspect of the present invention is a base station apparatus, in an SS burst set composed of Y SS/PBCH candidates included in a half radio frame, in the n-th SS/PBCH block a transmitter for transmitting an included PBCH; and a higher layer processor for setting a first monitoring opportunity for a first search area set based at least on fields included in the PBCH, wherein the SS burst set is the first 1 SS burst set, the higher layer processing unit sets the first monitoring occasion based on fields included in the SS/PBCH block, and the SS burst set is the second SS burst set. If yes, the field does not indicate the setting of the search area set, and the field indicates that there is a cell-defined SS/PBCH block on the same center frequency as the SS/PBCH block; The PBCH block indicates the setting of the first monitoring occasion.

(5) A fifth aspect of the present invention is a communication method used in a terminal device, in which an SS burst set composed of Y SS/PBCH candidates included in a half radio frame includes an n-th SS receiving a PBCH contained in a /PBCH block; and setting a first monitoring opportunity for a first set of search areas in a first slot based at least on fields contained in said PBCH, said The initial value of the period of the SS burst set corresponds to N _burst times the half radio frame, and the offset from the second slot, which is the first slot of the system frame with index j, to said first slot is O*. 2^μ, said O is given based at least on said PBCH, candidate values for said O correspond to integer multiples of the number of subframes included in said half radio frame, and range from 0 to (N _burst - 1) including at least a value included in the range of *5, wherein μ is given based on the setting of the subcarrier spacing of the PBCH;

(6) A sixth aspect of the present invention is a communication method used in a terminal device, in which an SS burst set composed of Y SS/PBCH candidates included in a half radio frame includes an n-th SS receiving a PBCH contained in a /PBCH block; and setting a first monitoring opportunity for a first search area set based at least on fields contained in the PBCH, wherein the SS burst set is the first 1 SS burst set, the higher layer processing unit sets the first monitoring occasion based on fields included in the SS/PBCH block, and the SS burst set is the second SS burst set. If yes, the field does not indicate the setting of the search area set, and the field indicates that there is a cell-defined SS/PBCH block on the same center frequency as the SS/PBCH block; The PBCH block indicates the setting of the first monitoring occasion.

(7) A seventh aspect of the present invention is a communication method used in a base station apparatus, in which an SS burst set composed of Y SS/PBCH candidates included in a half radio frame includes an n-th transmitting a PBCH contained in an SS/PBCH block; and setting a first monitoring opportunity for a first set of search areas in a first slot based at least on fields contained in said PBCH; The initial value of the period of the SS burst set corresponds to N _burst half radio frames, and the offset from the second slot, which is the first slot of the system frame with index j, to the first slot is O *2^μ, where O is given based at least on the PBCH, candidate values for O correspond to integer multiples of the number of subframes contained in the half radio frame, and from 0 to (N _burst −1) including at least a value included in the range of *5, wherein μ is given based on the setting of the subcarrier spacing of the PBCH.

(8) An eighth aspect of the present invention is a communication method used in a base station apparatus, in which an SS burst set composed of Y SS/PBCH candidates included in a half radio frame includes an n-th transmitting a PBCH contained in an SS/PBCH block; and setting a first monitoring opportunity for a first set of search areas based at least on fields contained in the PBCH, wherein the SS burst set is If it is the first SS burst set, the higher layer processing unit sets the first monitoring occasion based on fields included in the SS/PBCH block, and the SS burst set is the second SS burst set. , the field does not indicate the setting of the search area set, and the field indicates that there is a cell-defined SS/PBCH block on the same center frequency as the SS/PBCH block, and the cell-defined SS The /PBCH block indicates setting of the first monitoring occasion.

According to this invention, the terminal device can communicate efficiently. Also, the base station apparatus can communicate efficiently.

1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment; FIG. 7 is an example showing the relationship between subcarrier spacing setting μ, the number of OFDM symbols per slot N ^slot _symb , and CP (cyclic prefix) setting according to one aspect of the present embodiment. It is a figure which shows an example of the configuration method of the resource grid based on one aspect|mode of this embodiment. It is a figure which shows the structural example of the resource grid 3001 which concerns on one aspect|mode of this embodiment. 1 is a schematic block diagram showing a configuration example of a base station device 3 according to one aspect of the present embodiment; FIG. 1 is a schematic block diagram showing a configuration example of a terminal device 1 according to one aspect of the present embodiment; FIG. FIG. 4 is a diagram illustrating a configuration example of an SS/PBCH block according to one aspect of the present embodiment; FIG. 4 illustrates an example of a search area set monitoring opportunity according to an aspect of the present embodiments; It is a figure which shows the example of the counting procedure which concerns on one aspect|mode of this embodiment. FIG. 4 is a diagram illustrating a configuration example of an SS burst set according to one aspect of the present embodiment; FIG. 4 is a diagram illustrating a configuration example of an SS burst set according to one aspect of the present embodiment; FIG. 10 illustrates an example method for configuring monitoring occasions for a type 0 PDCCH common search region set according to an aspect of the present embodiments; FIG. 10 illustrates an example method for configuring monitoring occasions for a type 0 PDCCH common search region set according to an aspect of the present embodiments; FIG. 3 is a diagram illustrating an example of downlink communication according to one aspect of the present embodiment;

Embodiments of the present invention will be described below.

"A and/or B" may be a term that includes "A", "B", or "A and B". floor(C) may be the floor function for real C. For example, floor(C) may be a function that outputs the largest integer that does not exceed the real number C. ceil(D) may be the ceiling function for real D. For example, ceil(D) may be a function that outputs the smallest integer in the range not less than the real number D. mod(E,F) may be a function that outputs the remainder of dividing E by F. mod(E,F) may be a function that outputs a value corresponding to the remainder of E divided by F. exp(G)=e^G. where e is the Napier number. ĤI indicates H raised to the I power.

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

An OFDM symbol may be a designation that includes a CP attached to the OFDM symbol. That is, a certain OFDM symbol may be configured to include the certain OFDM symbol and the CP attached 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 radio communication system includes at least terminal devices 1A to 1C and a base station device 3 (BS#3: Base station#3). The terminal devices 1A to 1C are hereinafter also referred to as terminal device 1 (UE#1: User Equipment#1).

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

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

A serving cell may be configured to include at least one downlink component carrier (downlink carrier) and/or one uplink component carrier (uplink carrier). A serving cell may be configured to include at least two or more downlink component carriers and/or two or more uplink component carriers. Downlink component carriers and uplink component carriers are also called component carriers (carriers).

For example, one resource grid may be provided for one component carrier. Also, one resource grid may be provided for one component carrier and a certain subcarrier spacing configuration μ. Here, the setting μ of the subcarrier spacing is also called numerology. The resource grid includes N ^{size, μ} _{grid, x} N ^RB _sc subcarriers. The resource grid starts from the common resource block N ^{start, μ} _grid . The common resource block N ^{start, μ} _grid is also called the reference point of the resource grid. The resource grid includes N ^{subframe, μ} _symb OFDM symbols. x is a subscript indicating the transmission direction, indicating either downlink or uplink. One resource grid is given for a given antenna port p, a given subcarrier spacing configuration μ, and a given set of transmission directions x.

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

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

FIG. 2 is an example showing the relationship between subcarrier spacing setting μ, the number of OFDM symbols per slot N ^slot _symb , and CP (cyclic prefix) setting according to one aspect of the present embodiment. In FIG. 2A, for example, when the subcarrier spacing setting μ is 2 and the CP setting is a normal CP (normal cyclic prefix), N ^slot _symb =14, N ^{frame, μ} _slot =40, N ^{subframe, μ} _slot =4. Also, 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) _Tc 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,ref is 2048.

The transmission of signals in the downlink and/or the transmission of signals in the uplink may be organized into radio frames (system frames, frames) of length _Tf . T _f =(Δf _max N _f /100)·T _s =10 ms. “·” indicates multiplication. A radio frame includes 10 subframes. The subframe length 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 .

For a certain subcarrier spacing setting μ, the number and index of the slots contained in the subframe may be given. For example, the slot index n ^μ _s may be given in ascending order by integer values ranging from 0 to N ^{subframe, μ} _slot −1 in subframes. For the subcarrier spacing setting μ, the number and index of the slots contained in the radio frame may be given. Also, the slot indices n ^μ _s,f may be given in ascending order by integer values ranging from 0 to N ^frame,μ _slot −1 in the radio frame. N ^slot _symb consecutive OFDM symbols may be included in one slot. N ^slot _symb =14.

FIG. 3 is a diagram illustrating an example of a resource grid configuration method according to one aspect of the present embodiment. The horizontal axis of FIG. 3 indicates the frequency domain. FIG. 3 shows a configuration example of a resource grid with a subcarrier interval of _μ1 in a component carrier 300 and a configuration example of a resource grid with a subcarrier interval of _μ2 in a certain component carrier. In this way, one or more subcarrier intervals may be set for a given component carrier. Although it is assumed in FIG. 3 that μ ₁ =μ ₂ −1, various aspects of this embodiment are not limited to the condition μ ₁ =μ ₂ −1.

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

Point 3000 is an identifier for specifying a certain subcarrier. Point 3000 is also called point A. A common resource block (CRB) set 3100 is a set of common resource blocks for a subcarrier spacing setting _μ1 .

Of the common resource block set 3100 , the common resource block including the point 3000 (the block indicated by the upward slanting lines in FIG. 3 ) is also called the reference point of the common resource block set 3100 . The reference point of the common resource block set 3100 may be the common resource block with index 0 in the common resource block set 3100 .

Offset 3011 is the offset from the reference point of common resource block set 3100 to the reference point of resource grid 3001 . The offset 3011 is indicated by the number of common resource blocks for the subcarrier spacing setting _μ1 . The resource grid 3001 includes N ^{size, μ} _grid1,x common resource blocks starting from the reference point of the resource grid 3001 .

An offset 3013 is the 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 index i1.

Common resource block set 3200 is a set of common resource blocks for subcarrier spacing setting _μ2 .

Of the common resource block set 3200 , the common resource block including the point 3000 (the block indicated by the diagonal lines rising to the left in FIG. 3 ) is also called the reference point of the common resource block set 3200 . The reference point of the common resource block set 3200 may be the common resource block with index 0 in the common resource block set 3200 .

Offset 3012 is the offset from the reference point of common resource block set 3200 to the reference point of resource grid 3002 . The offset 3012 is indicated by the number of common resource blocks for the subcarrier spacing _μ2 . The resource grid 3002 includes N ^{size, μ} _grid2,x common resource blocks starting from the reference point of the resource grid 3002 .

Offset 3014 is the offset from the reference point of resource grid 3002 to the reference point (N ^{start, μ} _{BWP, i2} ) of BWP 3004 with index i2.

FIG. 4 is a diagram illustrating a configuration example of a 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 includes N ^{size, μ} _{grid1, x} N ^RB _sc subcarriers and N ^{subframe, μ} _symb OFDM symbols. Within the resource grid, the resource identified by the subcarrier index k _sc and OFDM symbol index l _sym is also called a resource element (RE).

A resource block (RB) includes N ^RB _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). where N ^RB _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 includes 12 resource elements corresponding to one OFDM symbol in one resource block.

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

The physical resource blocks for a given subcarrier spacing configuration μ are indexed in ascending order from 0 in the frequency domain in a given BWP. A physical resource block index n ^μ _PRB for a given subcarrier spacing setting μ satisfies the relationship n ^μ _CRB =n ^μ _PRB +N ^{start, μ} _BWP,i . where N ^start,μ _BWP,i denotes the reference point of the BWP of index i.

A BWP is defined as a subset of common resource blocks contained in a resource grid. A BWP contains N ^{size ,μ} _BWP,i common resource blocks starting from the reference point N start,μ _BWP,i of the BWP. A BWP configured for a downlink carrier is also called a downlink BWP. A BWP set for an uplink component carrier is also called an uplink BWP.

Antenna ports may be defined such that the channel over which symbols at one antenna port are conveyed can be estimated from the channels over which other symbols at that antenna port are conveyed (An antenna port is defined such that the channel over which a symbol on the antenna port is conveyed can be inferred from the channel over which another symbol on the same antenna port is conveyed). For example, a channel may correspond to a physical channel. Also, the symbols may correspond to OFDM symbols. A symbol may also correspond to a resource block unit. Symbols may also correspond to resource elements.

The fact that the large scale property of a channel through which symbols are conveyed at one antenna port can be estimated from the channel through which symbols are conveyed at another antenna port is that two antenna ports are QCL (Quasi Co-located ). Large-scale characteristics may include at least long-term characteristics of the channel. Large scale characteristics include delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. It may include at least part or all. A first antenna port and a second antenna port are QCL with respect to beam parameters if the receive beam expected by the receiver for the first antenna port and the receive beam expected by the receiver for the second antenna port and may be the same. A first antenna port and a second antenna port are QCL with respect to beam parameters if the transmit beam expected by the receiver for the first antenna port and the transmit beam expected by the receiver for the second antenna port and may be the same. The terminal device 1 assumes that the two antenna ports are QCL when the large-scale characteristics of the channel through which the symbols are transmitted at one antenna port can be estimated from the channel through which the symbols are transmitted at another antenna port. may be Two antenna ports being QCL may be assumed to be two antenna ports being QCL.

Carrier aggregation may be communication using multiple serving cells that are aggregated. Also, carrier aggregation may be communication using a plurality of aggregated component carriers. Also, carrier aggregation may be communication using a plurality of aggregated downlink component carriers. Also, carrier aggregation may be communication using a plurality of aggregated uplink component carriers.

FIG. 5 is a schematic block diagram showing a configuration example of the base station device 3 according to one aspect of the present embodiment. As shown in FIG. 5 , the base station device 3 includes at least part or all of a radio transmission/reception unit (physical layer processing unit) 30 and/or an upper layer processing unit 34 . The radio transmission/reception unit 30 includes at least 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 part or all of a medium access control layer processing unit 35 and a radio resource control (RRC: Radio Resource Control) layer processing unit 36 .

The radio transmitting/receiving section 30 includes at least part or all of a radio transmitting section 30a and a radio receiving section 30b. Here, the device configurations of the baseband unit included in the radio transmission unit 30a and the baseband unit included in the radio reception unit 30b may be the same or different. Further, the device configuration of the RF unit included in the wireless transmission unit 30a and the RF unit included in the wireless reception unit 30b may be the same or different. Further, the device configuration of the antenna unit included in the wireless transmission unit 30a and the antenna unit included in the wireless reception unit 30b may be the same or may be different.

The upper layer processing unit 34 outputs the downlink data (transport block) to the radio transmission/reception unit 30 (or the radio transmission unit 30a). The upper layer processing unit 34 performs processing of a MAC (Medium Access Control) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and an RRC layer.

A medium access control layer processing unit 35 included in the upper layer processing unit 34 performs MAC layer processing.

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

The radio transmission/reception unit 30 (or radio transmission unit 30a) performs processing such as modulation and coding. The radio transmission/reception unit 30 (or the radio transmission unit 30a) modulates, encodes, and generates a baseband signal (converts to a time-continuous signal) of downlink data to generate a physical signal, and transmits the physical signal to the terminal device 1. . The radio transmitting/receiving unit 30 (or radio transmitting unit 30 a ) may allocate the physical signal to a certain component carrier and transmit it to the terminal device 1 .

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

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

The baseband unit 33 receives an analog signal input from the RF unit 32
to a 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 CP-removed signal, and converts the signal in the frequency domain. Extract.

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

The RF unit 32 uses a low-pass filter to remove excess frequency components from the analog signal input from the baseband unit 33, up-converts the analog signal to a carrier frequency, and transmits the signal through the antenna unit 31. do. Also, the RF unit 32 may have a function of controlling transmission power. The RF section 32 is also called a transmission power control section.

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

Each of the serving cells configured for the terminal device 1 may be one of PCell (Primary cell), PSCell (Primary SCG cell), and SCell (Secondary Cell).

PCell is a serving cell included in MCG (Master Cell Group). computer
ell is a cell (implemented cell) in which the terminal device 1 implements an initial connection establishment procedure or a connection re-establishment procedure.

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

SCell may be included in either MCG or SCG.

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

One or more downlink BWPs may be configured for each serving cell (or downlink component carrier). One or more uplink BWPs may be configured for each serving cell (or uplink component carrier).

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

PDSCH, PDCCH and CSI-RS may be received in the active downlink BWP. The terminal device 1 may receive PDSCH, PDCCH and CSI-RS in the active downlink BWP. PUCCH and PUSCH may be transmitted in the active uplink BWP. The terminal device 1 may transmit PUCCH and PUSCH in active uplink BWP. Active downlink BWP and active uplink BWP are also called active BWP.

PDSCH, PDCCH, and CSI-RS may not be received in downlink BWPs other than active downlink BWPs (inactive downlink BWPs). The terminal device 1 may not receive the PDSCH, PDCCH, and CSI-RS in downlink BWPs other than the active downlink BWP. PUCCH and PUSCH may not be transmitted in uplink BWPs other than active uplink BWPs (inactive uplink BWPs). The terminal device 1 may not transmit PUCCH and PUSCH in uplink BWPs other than the active uplink BWP. Inactive downlink BWP and inactive uplink BWP are also called inactive BWP.

A downlink BWP switch is used to deactivate one active downlink BWP and to activate any inactive downlink BWP other than the one active downlink BWP. Used. Downlink BWP switching may be controlled by a BWP field included in downlink control information. Downlink BWP switching may be controlled based on higher layer parameters.

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

Of the one or more downlink BWPs configured for the serving cell, two or more downlink BWPs may not be configured as active downlink BWPs. For a serving cell, one downlink BWP may be active at a time.

Of the one or more uplink BWPs configured for the serving cell, two or more uplink BWPs may not be configured as active uplink BWPs. For the serving cell, one uplink BWP may be active at a time.

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

The radio transmitting/receiving section 10 includes at least part or all of the radio transmitting section 10a and the radio receiving section 10b. Here, the device configurations of the baseband unit 13 included in the radio transmission unit 10a and the baseband unit 13 included in the radio reception unit 10b may be the same or different. Further, the device configuration 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 configuration of the antenna section 11 included in the radio transmission section 10a and the device configuration of the antenna section 11 included in the radio reception section 10b may be the same or different.

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

A medium access control layer processing unit 15 included in the upper layer processing unit 14 performs MAC layer processing.

A radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs RRC layer processing. The radio resource control layer processing unit 16 manages various setting information/parameters (RRC parameters) of the terminal device 1 . The radio resource control layer processing unit 16 receives the R
Set the RRC parameters based on the RC message.

The radio transmission/reception unit 10 (or the radio transmission unit 10a) performs processing such as modulation and coding. The radio transmission/reception unit 10 (or the radio transmission unit 10a) modulates, encodes, and generates a baseband signal (converts to a time-continuous signal) of uplink data to generate a physical signal, and transmits the physical signal to the base station device 3. do. The radio transmitting/receiving unit 10 (or the radio transmitting unit 10 a ) may place the physical signal in a certain BWP (active uplink BWP) and transmit it to the base station device 3 .

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

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

The baseband section 13 converts the analog signal input from the RF section 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 CP-removed signal, and converts the signal in the frequency domain. Extract.

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

The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, up-converts the analog signal to a carrier frequency, and transmits the signal through the antenna unit 11. do. Also, the RF unit 12 may have a function of controlling transmission power. The RF section 12 is also called a transmission power control section.

The physical signal (signal) will be described below.

A physical signal is a general term for a downlink physical channel, a downlink physical signal, an uplink physical channel, and an uplink physical channel. A physical channel is a general term for a downlink physical channel and an uplink physical channel. A 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 originating in higher layers. An uplink physical channel may be a physical channel used in an uplink component carrier. An uplink physical channel may be transmitted by the terminal device 1 . An uplink physical channel may be received by the base station device 3 . In a radio communication system according to an aspect of the present embodiment, at least some or all of the following uplink physical channels may be used.
・PUCCH (Physical Uplink Control Channel)
・PUSCH (Physical Uplink Shared CHannel)
・PRACH (Physical Random Access Channel)

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

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), HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) at least part or all of the information.

The channel state information is also called channel state information bits or channel state information sequences. A scheduling request is also called a scheduling request bit or a scheduling request sequence. The HARQ-ACK information is also called HARQ-ACK information bits or HARQ-ACK information sequence.

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 Channel, PUSCH: Physical Uplink Shared CHannel). HARQ-ACK may indicate ACK (acknowledgment) or NACK (negative-acknowledgement) corresponding to the transport block. ACK may indicate that decoding of the transport block has been successfully completed (has been decoded). NACK may indicate that decoding 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 and the PDSCH used to transmit the transport block correspond.

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

A scheduling request may be used at least to request PUSCH (or UL-SCH) resources for a new transmission. The scheduling request bit may be used to indicate either positive SR or negative SR. The Scheduling Request bit indicating a positive SR is also referred to as "positive SR sent". A positive SR may indicate that PUSCH (or UL-SCH) resources for initial transmission are requested by the terminal device 1 . A positive SR may indicate that the scheduling request is triggered by higher layers. A positive SR may be sent when higher layers indicate to send a scheduling request. The Scheduling Request bit indicating negative SR is also referred to as "negative SR is sent". A negative SR may indicate that no PUSCH (or UL-SCH) resource is requested for the initial transmission by the terminal device 1 . A negative SR may indicate that no scheduling request is triggered by higher layers. A negative SR may be sent when no scheduling request is indicated to be sent by higher layers.

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

Channel state information may be provided at least based on receiving physical signals (eg, CSI-RS) that are used at least for channel measurements. The channel state information may be selected by the terminal device 1 based at least on receiving physical signals that are used at least for channel measurements. Channel measurements may include interference measurements.

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

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

PRACH may be used to transmit random access preambles. 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) sequence. x _u is defined by x _u =exp(−jπui(i+1)/L _RA ). j is the imaginary unit. Also, π is the circular constant. _Cv corresponds to the cyclic shift of the PRACH sequence. L _RA corresponds to the length of the PRACH sequence. L _RA is 839 or 139. i is an integer ranging from 0 to L _RA −1. u is the sequence index for the PRACH sequence. The terminal device 1 may transmit the PRACH. The base station device 3 may receive the PRACH.

64 random access preambles are defined for a given PRACH opportunity. A random access preamble is identified (determined, given) based at least on the cyclic shift C _v of the PRACH sequence and the sequence index u for the PRACH sequence.

An uplink physical signal may correspond to a set of resource elements. Uplink physical signals may not carry information originating in higher layers. The uplink physical signal may be a physical signal used in an 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 radio communication system according to one aspect of the present embodiment, at least some or all of the following uplink physical signals may be used.
・UL DMRS (Uplink Demodulation Reference Signal)
・SRS (Sounding Reference Signal)
・UL PTRS (Uplink Phase Tracking Reference Signal)

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

A set of antenna ports for DMRS for PUSCH (DMRS associated with PUSCH, DMRS included in PUSCH, DMRS corresponding to PUSCH) may be provided based on the set of antenna ports for the PUSCH. That is, the set of DMRS antenna ports for the PUSCH may be the same as the set of antenna ports for the PUSCH.

A PUSCH transmission and a DMRS transmission for the PUSCH may be indicated (or scheduled) by one DCI format. A PUSCH and a DMRS for the PUSCH may be collectively referred to as a PUSCH. Transmitting the PUSCH may be transmitting the PUSCH and DMRS for the PUSCH.

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

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

A PUCCH transmission and a DMRS transmission for the PUCCH may be indicated (or triggered) by one DCI format. A PUCCH to resource element mapping and/or a DMRS to resource element mapping for the PUCCH may be provided by one PUCCH format. A PUCCH and a DMRS for the PUCCH may be collectively referred to as a PUCCH. Transmitting the PUCCH may be transmitting the PUCCH and the DMRS for the PUCCH.

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

A downlink physical channel may correspond to a set of resource elements that carry information originating in higher layers. A downlink physical channel may be a physical channel used in a downlink component carrier. The base station device 3 may transmit a downlink physical channel. The terminal device 1 may receive a downlink physical channel. In the radio communication system according to one aspect of the present embodiment, at least some or all of the following downlink physical channels may be used.
・PBCH (Physical Broadcast Channel)
・PDCCH (Physical Downlink Control Channel)
・PDSCH (Physical Downlink Shared Channel)

The PBCH may be used to transmit MIB (Master Information Block) and/or physical layer control information. PBCH may be sent to deliver, transmit, convey MIB and/or physical layer control information. B.
A CH may be mapped to the PBCH. The terminal device 1 may receive the MIB and/or the PBCH on which the physical layer control information is arranged. The base station device 3 may transmit the PBCH on which MIB and/or physical layer control information is arranged. The physical layer control information is also called PBCH payload, timing related PBCH payload. A MIB may contain one or more higher layer parameters.

The physical layer control information contains 8 bits. The physical layer control information may include at least some or all of 0A to 0D below.
0A) Radio frame bit 0B) Half radio frame (half system frame, half frame) bit 0C) SS/PBCH block index bit 0D) Subcarrier offset bit

A radio frame bit is used to indicate the radio frame in which the PBCH is transmitted (the radio frame containing the slot in which the PBCH is transmitted). A radio frame bit includes 4 bits. A radio frame bit may consist of 4 bits of a 10-bit radio frame indicator. For example, the radio frame indicator may at least be 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 last five subframes of the radio frame in which the PBCH is transmitted. Here, the half radio frame may be configured including 5 subframes. Also, the half radio frame may be composed of the first five subframes of the ten subframes included in the radio frame. Also, the half radio frame may be composed of the last five subframes 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 bits contain 3 bits. The SS/PBCH block index bits may consist of 3 bits of the 6-bit SS/PBCH block index indicator. The SS/PBCH block index indicator may be used at least to identify the SS/PBCH blocks from index 0 to index 63.

A subcarrier offset bit is used to indicate a subcarrier offset. A subcarrier offset may be used to indicate the difference between the top subcarrier to which the PBCH is mapped and the top subcarrier to which the control resource set with index 0 is mapped.

The PDCCH may be used to transmit downlink control information (DCI). The PDCCH may be transmitted to deliver, transmit, and convey downlink control information. Downlink control information may be mapped to 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 PDCCH in which downlink control information is arranged.

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

DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1 are DCI formats that each include a different set of fields. The uplink DCI format is a general term for DCI format 0_0 and DCI format 0_1. A downlink DCI format is a general term for DCI format 1_0 and DCI format 1_1.

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

A DCI format specific field may indicate whether a DCI format including the DCI format specific field is an uplink DCI format or a downlink DCI format. A DCI format specific field included in DCI format 0_0 may indicate 0 (or may indicate that DCI format 0_0 is an uplink DCI format).

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

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

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

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

DCI format 0_0 may not include fields used for CSI requests (CSI requests). That is, CSI may not be required by DCI format 0_0.

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

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

DCI format 0_1 is used at least for scheduling PUSCH of a certain cell (located in a certain cell). DCI format 0_1 includes at least some or all of the fields 2A to 2H.
2A) DCI format identification 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

A DCI format specific field included in DCI format 0_1 may indicate 0 (or may indicate that DCI format 0_1 is an uplink DCI format).

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

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

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

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

The CSI request field is used at least to indicate reporting of CSI.

If DCI format 0_1 includes a carrier indicator field, the carrier indicator field may be used to indicate the uplink component carrier on which PUSCH is arranged. When DCI format 0_1 does not include a carrier indicator field, the uplink component carrier on which PUSCH is mapped is the same as the uplink component carrier on which PDCCH including DCI format 0_1 used for scheduling the PUSCH is mapped. good too. When the number of uplink component carriers configured in the terminal device 1 in a certain serving cell group is 2 or more (when uplink carrier aggregation is operated in a certain serving cell group), PUSCH arranged in the certain serving cell group. The number of bits of the carrier indicator field included in DCI format 0_1 used for scheduling may be 1 bit or more (eg, 3 bits). When the number of uplink component carriers configured in the terminal device 1 in a certain serving cell group is 1 (when uplink carrier aggregation is not operated in a certain serving cell group), scheduling of PUSCH arranged in the certain serving cell group The number of bits of the carrier indicator field included in the used DCI format 0_1 may be 0 bits (or the carrier indicator field is included in the DCI format 0_1 used for scheduling of the PUSCH arranged in the serving cell group. may be omitted).

DCI format 1_0 is used at least for PDSCH scheduling of a certain cell (located in a certain cell). DCI format 1_0 includes 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

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

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

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

The MCS field included in DCI format 1_0 may be used at least to indicate part or all of the modulation scheme and/or target coding rate for the PDSCH. The target code rate may be a target code rate for a PDSCH transport block. A PDSCH transport block size (TBS) may be given based at least on the target coding rate and part or all of the modulation scheme for the PDSCH.

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

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

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

DCI format 1_0 may not include the BWP field. That is, the downlink BWP in which the PDSCH scheduled by the 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 used at least for PDSCH scheduling of a certain cell (or arranged in a certain cell). DCI format 1_1 includes at least part 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 indication field 4H) BWP field 4I) Carrier indicator field

A DCI format specific field included in DCI format 1_1 may indicate 1 (or may indicate that DCI format 1_1 is a downlink DCI format).

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

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

The MCS field included in DCI format 1_1 may be used at least to indicate some or all of the modulation scheme and/or target coding rate for the PDSCH.

When the PDSCH_HARQ feedback timing indication field is included in DCI format 1_1, the PDSCH_HARQ feedback timing indication field indicates the offset from the slot including the last OFDM symbol of PDSCH to the slot including the first OFDM symbol of PUCCH. may be used at least for If the PDSCH_HARQ feedback timing indication field is not included in DCI format 1_1, the offset from the slot that includes the last OFDM symbol of PDSCH to the slot that includes the first OFDM symbol of PUCCH may be specified by higher layer parameters. good.

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

If the DCI format 1_1 includes a BWP field, the BWP field may be used to indicate the downlink BWP in which the PDSCH is arranged. If the DCI format 1_1 does not include the BWP field, the downlink BWP in which the PDSCH is arranged may be the same as the downlink BWP in which the PDCCH including the DCI format 1_1 used for scheduling the PDSCH is arranged. When the number of downlink BWPs configured in the terminal device 1 in a certain downlink component carrier is 2 or more, the BWP field included in the DCI format 1_1 used for scheduling the PDSCH arranged in the certain downlink component carrier. The number of bits may be 1 bit or more. When the number of downlink BWPs configured in the terminal device 1 in a certain downlink component carrier is 1, the bits of the BWP field included in the DCI format 1_1 used for scheduling the PDSCH arranged in the certain downlink component carrier. The number may be 0 bits (or the BWP field may not be included in the DCI format 1_1 used for scheduling PDSCH allocated to the certain downlink component carrier).

If the DCI format 1_1 includes a carrier indicator field, the carrier indicator field may be used to indicate the downlink component carrier on which the PDSCH is arranged. When DCI format 1_1 does not include a carrier indicator field, the downlink component carrier on which PDSCH is arranged is the same as the downlink component carrier on which PDCCH including DCI format 1_1 used for scheduling of the PDSCH is arranged. good too. When the number of downlink component carriers configured in the terminal device 1 in a certain serving cell group is 2 or more (when downlink carrier aggregation is operated in a certain serving cell group), PDSCH arranged in the certain serving cell group. The number of bits of the carrier indicator field included in the DCI format 1_1 used for scheduling may be 1 bit or more (eg, 3 bits). When the number of downlink component carriers configured in the terminal device 1 in a certain serving cell group is 1 (when downlink carrier aggregation is not operated in a certain serving cell group), scheduling of the PDSCH arranged in the certain serving cell group The number of bits of the carrier indicator field included in the used DCI format 1_1 may be 0 bits (or the carrier indicator field is included in the DCI format 1_1 used for scheduling the PDSCH allocated to the serving cell group. may be omitted).

PDSCH may be used to transmit transport blocks. PDSCH may be used to transmit transport blocks corresponding to DL-SCH. PDSCH may be used to convey transport blocks. PDSCH may be used to convey transport blocks corresponding to DL-SCH. Transport blocks may be placed on the PDSCH. A transport block corresponding to the DL-SCH may be placed in the PDSCH. The base station device 3 is a PD
SCH may be transmitted. The terminal device 1 may receive the PDSCH.

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

The synchronization signal may be used at least for the terminal device 1 to synchronize in the downlink frequency domain and/or time domain. A synchronization signal is a general term for PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal).

FIG. 7 is a diagram illustrating a configuration example of an 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, hatched blocks indicate a set of resource elements for the PSS. Also, the grid block indicates a set of resource elements for the SSS. Also, a block with horizontal lines indicates a set of resource elements for a PBCH and a DMRS for the PBCH (DMRS associated with the PBCH, DMRS included in the PBCH, and DMRS corresponding to the PBCH).

As shown in FIG. 7, the SS/PBCH block includes PSS, SSS and PBCH. Also, the SS/PBCH block includes four consecutive OFDM symbols. The SS/PBCH block contains 240 subcarriers. The PSS is arranged on the 57th to 183rd subcarriers in the 1st OFDM symbol. The SSS is located on the 57th to 183rd subcarriers in 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 1st OFDM symbol may be set to zero. The 49th to 56th subcarriers of the 3rd OFDM symbol may be set to zero. The 184th to 192nd subcarriers of the 3rd OFDM symbol may be set to zero. The PBCH is arranged on subcarriers that are the 1st to 240th subcarriers of the second OFDM symbol and on which no DMRS for the PBCH is arranged. The PBCH is arranged on subcarriers that are the 1st to 48th subcarriers of the 3rd OFDM symbol and on which no DMRS for the PBCH is arranged. The PBCH is arranged in the 193rd to 240th subcarriers of the 3rd OFDM symbol and in subcarriers where no DMRS for the PBCH is arranged. The PBCH is arranged in subcarriers that are the 1st to 240th subcarriers of the 4th OFDM symbol and in which the DMRS for the PBCH is not arranged.

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

A PBCH to which symbols of a PBCH in a certain antenna port are transmitted is a DMRS for the PBCH that is mapped to the slot to which the PBCH is mapped, and is included in the SS/PBCH block that includes the PBCH. of DMRS.

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

A set of antenna ports for a DMRS for the PDSCH (DMRS associated with the PDSCH, DMRS included in the PDSCH, DMRS corresponding to the PDSCH) may be provided based on the set of antenna ports for the 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.

A PDSCH transmission and a DMRS transmission for the PDSCH may be indicated (or scheduled) by one DCI format. A PDSCH and a DMRS for the PDSCH may be collectively referred to as a PDSCH. Transmitting the PDSCH may be transmitting the PDSCH and the DMRS for the PDSCH.

PDSCH may be estimated from the DMRS for the PDSCH. That is, the PDSCH propagation path may be estimated from the DMRS for the PDSCH. If a set of resource elements in which a certain PDSCH symbol is transmitted and a set of resource elements in which a DMRS symbol for the certain PDSCH is transmitted are included in the same precoding resource group (PRG) In that case, the PDSCH on which the PDSCH symbols on a given antenna port are conveyed may be estimated by the DMRS for the PDSCH.

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

A PDCCH may be estimated from the DMRS for the PDCCH. That is, the PDCCH propagation path may be estimated from the DMRS for the PDCCH. If the same precoder is applied (assumed to be applied, applicable), the PDCCH on which the symbols for that PDCCH at a given antenna port are conveyed may be estimated by the DMRS for that PDCCH.

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

One UL-SCH and one DL-SCH may be provided per serving cell. A BCH may be provided to the PCell. BCH may not be given to PSCell, SCell.

BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. for example,
BCCH is an RRC layer channel used to transmit MIB or system information. Also, 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 terminal device 1 that is not RRC-connected. Also, a DCCH (Dedicated Control CHannel) may be used at least to transmit a dedicated RRC message to the terminal device 1 . Here, the DCCH may be used, for example, for terminal equipment 1 that is RRC-connected.

The RRC message includes one or more RRC parameters (information elements). For example, the RRC message may contain the MIB. The RRC message may also contain system information. Also, the RRC message may include a message corresponding to CCCH. Also, the RRC message may include a message corresponding to the DCCH.

A BCCH in a logical channel may be mapped to a BCH in a transport channel or a DL-SCH. A CCCH in a Logical Channel may be mapped to a DL-SCH or UL-SCH in a Transport Channel. A DCCH in a Logical Channel may be mapped to a DL-SCH or UL-SCH in a Transport Channel.

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

Higher layer parameters (upper layer parameters) are parameters included in an RRC message or a MAC CE (Medium Access Control Control Element). in short,
Higher layer parameters are a collective term for information included in MIB, system information, messages corresponding to CCCH, messages corresponding to DCCH, and MAC CE.

The procedure performed by the terminal device 1 includes at least some or all of 5A to 5C below.
5A) Cell search
5B) random access
5C) data communication

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

A PSS sequence is given based at least on a physical cell ID. A sequence of SSSs is provided based at least on the physical cell ID.

In a half radio frame, the placement of the leading OFDM symbol indices of the candidate SS/PBCH blocks is given based at least on the SS/PBCH block indices. For example, if the subcarrier spacing of the SS/PBCH block is 30 kHz (if the subcarrier spacing setting μ=1 for the SS/PBCH block), the indices {0, 1, 2, 3, 4, 5, 6, 7} of SS/PBCH block candidates (SS/P
BCH candidate) may be {2, 8, 16, 22, 30, 36, 44 ^, 50 _} , respectively. The OFDM symbol indices l ^hrf _sym may be given in ascending order by integer values ranging from 0 to N ^{frame, μ} _slot *N ^slot _symb /2−1 in half radio frames.

The SS/PBCH block candidates indicate resources on which transmission of SS/PBCH blocks is allowed (possible, reserved, configured, specified, possible).

The set of candidate SS/PBCH blocks in a half-radio frame is also called the SS burst set. An SS burst set is also called a transmission window, an SS transmission window, or a DRS transmission window (Discovery Reference Signal transmission window).

The base station apparatus 3 transmits SS/PBCH blocks of one or more indices at a predetermined cycle. The terminal device 1 may detect at least one of the SS/PBCH blocks of the one or more indices and attempt to decode the PBCH included in the SS/PBCH blocks.

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

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

Message 2 is a procedure in which the terminal device 1 tries to detect DCI format 1_0 with CRC (Cyclic Redundancy Check) scrambled with RA-RNTI (Random Access-Radio Network Temporary Identifier). The terminal device 1 includes the DCI format in the control resource set provided 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 configuration of the search area set. Try to detect PDCCH.

Message 3 is a procedure for transmitting a PUSCH scheduled by a random access response grant contained in DCI format 1_0 detected by the message 2 procedure. Here, a random access response grant is indicated by MAC CE included in the PDSCH scheduled by the DCI format 1_0.

A PUSCH scheduled based on a random access response grant is either a message 3 PUSCH or a PUSCH. Message 3 PUSCH contains the contention resolution identifier MAC CE. Collision Resolution ID MAC CE contains a Collision Resolution ID.

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

Message 4 is a procedure that attempts to detect DCI format 0_0 with a scrambled CRC 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 0_0. The PDSCH may contain a collision 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 resources identified based on the control resource set and the search area set (monitor PDCCH).

A control resource set is a resource set composed of a predetermined number of resource blocks and a predetermined number of OFDM symbols. In the frequency domain, the control resource set may consist of contiguous 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 higher layer parameters. The number of OFDM symbols that make up the control resource set may be indicated by a higher layer parameter.

The terminal device 1 attempts to detect the PDCCH in the search area set. Here, trying to detect a PDCCH in the search area set may be trying to detect a PDCCH candidate in the search area set, or may be trying to detect a DCI format in the search area set. Then, it may be trying to detect PDCCH in the control resource set, may be trying to detect PDCCH candidates in the control resource set, or may be trying to detect the DCI format in the control resource set. There may be.

A search region 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 uses a type 0 PDCCH common search space set, a type 0a PDCCH common search space set, a type 1 PDCCH common search space set, One of Type2 PDCCH common search space set, Type3 PDCCH common search space set, and/or UE-specific PDCCH search space set Attempt to detect PDCCH candidates in part or all.

A type 0 PDCCH common search region set may be used as the index 0 common search region set. The type 0 PDCCH common search region set may be the index 0 common search region set.

A CSS set is a generic term for a type 0 PDCCH common search area set, a type 0a PDCCH common search area set, a type 1 PDCCH common search area set, a type 2 PDCCH common search area set, and a type 3 PDCCH common search area set. A USS set is also referred to as a UE-specific PDCCH search area set.

A search area set is associated with (included in, corresponds to) a control resource set. The index of the control resource set associated with the search area set may be indicated by a higher layer parameter.

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

A monitoring occasion for a given search region set may correspond to the OFDM symbol in which the leading OFDM symbol of the control resource set associated with the given search region set is located. A monitoring opportunity for a given search area set may correspond to resources of the control resource set starting from the first OFDM symbol of the control resource set associated with the given search area set. The search area set monitoring opportunities are provided based on at least some or all of a PDCCH monitoring interval, a PDCCH monitoring pattern within a slot, and a PDCCH monitoring offset.

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

In FIG. 8, the blocks indicated by grid lines indicate the search area set 91, the blocks indicated by diagonal lines rising to the right indicate the search area set 92, the blocks indicated by diagonal lines rising to the left indicate the search area set 93, and the blocks indicated by horizontal lines indicate the search area set 93. The block shown represents the search area set 94 .

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

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

The monitoring interval of search area set 93 is set to 2 slots, the monitoring offset of search area set 93 is set to 0 slots, and the monitoring pattern of search area set 93 is [0,0
, 0,0,0,0,0,1,0,0,0,0,0,0]. That is, the monitoring opportunity for search area 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
, 0,0,0,0,0,0,0,0,0,0,0,0]. That is, the monitoring opportunity for search area set 94 corresponds to the first OFDM symbol (OFDM symbol #0) in each of the odd slots.

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

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

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 at least be used for the DCI format that accompanies it.

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

A type 3 PDCCH common search area set may be used for DCI formats with CRC sequences scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI).

A UE-specific PDCCH search region set may be used at least 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 used at least for PDSCH resource allocation. The detected downlink DCI format is also called a downlink assignment. The terminal device 1 attempts to receive the PDSCH. 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 based on the PUCCH resource indicated based on the detected downlink DCI format.

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

The base station apparatus 3 and the terminal apparatus 1 may perform a channel access procedure in the serving cell c and transmit transmission waves in the serving cell c. For example, serving cell c may be a serving cell configured in an unlicensed band. A transmission wave is a signal transmitted from the base station device 3 or the terminal device 1 to the medium.

The base station apparatus 3 and the terminal apparatus 1 may perform the channel access procedure on the carrier f of the serving cell c and transmit the transmission wave on the carrier f of the serving cell c. Carrier f is a carrier included in serving cell c. A carrier f may consist of a set of resource blocks given based on higher layer parameters.

The base station apparatus 3 and the terminal apparatus 1 may perform a channel access procedure in carrier f of serving cell c and transmit transmission waves in band part b of carrier f of serving cell c. Band part b is a subset of the bands contained in carrier f.

The base station apparatus 3 and the terminal apparatus 1 may perform a channel access procedure in band part b of carrier f of serving cell c and transmit transmission waves in carrier f of serving cell c. Transmitting the transmission wave in carrier f of serving cell c may be transmitting the transmission wave in any of the band parts included in carrier f of serving cell c.

The base station apparatus 3 and the terminal apparatus 1 may perform a channel access procedure in band part b of carrier f of serving cell c, and transmit transmission waves in band part b of carrier f of serving cell c.

A channel access procedure may comprise at least one or both of a first sensing and a counting procedure. A first channel access procedure may include a first measurement. The first channel access procedure may not include the counting procedure. The second channel access procedure may at least include both the first measurement and counting procedure. A channel access procedure is a name that includes part or all of the first channel access procedure and the second channel access procedure.

A transmission wave including at least the SS/PBCH block may be transmitted after the first channel access procedure is performed. After the first channel access procedure is performed, the SS/PBCH block, the PDSCH containing the broadcast information, the PDCCH containing the DCI format used for scheduling the PDSCH, and the transmission including at least part or all of the CSI-RS Waves may be transmitted. After the second channel access procedure is performed, a transmission wave including at least PDSCH including information other than broadcast information may be transmitted. The PDSCH including broadcast information may include at least part or all of the PDSCH including system information, the PDSCH including paging information, and the PDSCH used for random access (message 2 and/or message 4).

SS / PBCH block, PDSCH containing broadcast information, PDCCH containing DCI format used for scheduling of the PDSCH, and a transmission wave containing at least part or all of CSI-RS is also called DRS (Discovery Reference Signal). be. DRS may be a signal transmitted after the first channel access procedure.

When the duration of the DRS is equal to or less than a predetermined length and the duty cycle of the DRS is equal to or less than a predetermined value, a transmission wave including the DRS is transmitted after the first channel access procedure is performed. may A transmission including the DRS may be transmitted after a second channel access procedure is performed if the duration of the DRS exceeds the predetermined length. A transmission wave including the DRS may be transmitted after the second channel access procedure is performed when the duty ratio of the DRS exceeds the predetermined value. For example, the predetermined length may be 1 ms. Also, the predetermined value may be 1/20.

Transmitting the transmission wave after the channel access procedure is performed may be transmitting the transmission wave based on the channel access procedure. Transmitting the transmission wave after the channel access procedure is performed may be transmitting the transmission wave when it is given that the channel is transmittable based on the channel access procedure.

The first measurement is that in one or more LBT slot durations (LBT slot duration) of the deferred duration (defer duration), the medium (Medium) is detected to be idle (Idle). good. Here, LBT (Listen Before Talk) may be a procedure in which whether the medium is idle or busy is given based on carrier sense. Carrier sensing may be performing energy detection in the medium. For example, busy may be a state in which the amount of energy detected by carrier sensing is greater than a predetermined threshold. Also, idle may be a state in which the amount of energy detected by carrier sensing is smaller than a predetermined threshold. Also, it may be idle that the amount of energy detected by carrier sensing is equal to a predetermined threshold. Also, it may be busy that the amount of energy detected by carrier sense is equal to a predetermined threshold.

Being idle may be not being busy. Being busy may be not being idle.

The LBT slot duration is in units of LBT. Each LBT slot period may be given whether the medium is idle or busy. For example, the LBT slot duration may be 9 microseconds.

The deferral period may include at least the period T _f and one or more LBT slot periods. The length of the deferral period is referred to as _Td . For example, the period _Tf may be 16 microseconds.

FIG. 9 is a diagram illustrating an example of a counting procedure according to one aspect of the present embodiment. The counting procedure includes at least some or all of steps A1 to A6. Step A1 includes the operation of setting the value of counter N to _Ninit . where N _ini
t is a value randomly (or pseudo-randomly) selected from integer values in the range from 0 to CWp. CWp is the Contention Window Size (CWS) for channel access priority class p.

At step A2, it is determined whether or not the value of the counter N is zero. Step A2 includes completing (or terminating) the channel access procedure if the counter N is zero. Step A2 includes proceeding to step A3 if the counter N is different from zero. Here, True in FIG. 9 corresponds to the fact that the evaluation formula is true in the step including the operation of determining the evaluation formula. False corresponds to the fact that the evaluation formula is false in a step including an operation for determining the evaluation formula. In step A2, the evaluation formula corresponds to counter N=0.

For example, Step A3 may include a step of decrementing the value of the counter N. Decrementing the value of the counter N may be decreasing the value of the counter N by one. That is, decrementing the value of counter N may be setting the value of counter N to N−1.

For example, step A3 may comprise decrementing the value of the counter N if N>0. Moreover, step A3 may include a step of decrementing the value of the counter N when the base station device 3 or the terminal device 1 selects to decrement the counter N. Step A3 may also include a step of decrementing the value of the counter N when N>0 and the base station device 3 and the terminal device 1 choose to decrement the counter N. good.

For example, step A4 (Step A4) may include performing carrier sense of the medium in LBT slot period d and proceeding to step A2 when LBT slot period d is idle. Moreover, step A4 may include the operation|movement which progresses to step A2, when LBT slot period d is determined by carrier sense to be idle. Further, step A4 may include performing carrier sense in LBT slot period d and proceeding to step A5 when LBT slot period d is busy. Moreover, step A4 may include the operation|movement which progresses to step A5, when LBT slot period d is determined by carrier sense to be busy. Here, the LBT slot period d is the LBT slot period, and may be the next LBT slot period of the LBT slot period already carrier-sensed in the counting procedure. In step A4, the evaluation formula may correspond to LBT slot period d being idle.

Step A5 continues until it is detected that the medium is busy in one LBT slot period included in the deferral period or the medium is idle in all LBT slot periods included in the deferral period. It includes the operation of performing carrier sense until detected.

Step A6 includes proceeding to step A5 if the medium is detected to be busy during certain LBT slot periods included in the postponement period. Step A6 includes proceeding to step A2 if the medium is detected to be idle in all LBT slot periods included in the deferral period. In step A6, the evaluation formula may correspond to the medium being idle during the certain LBT slot period.

CW _min,p indicates the minimum value of the range of possible values of the contention window size CWp for channel access priority class p. CW _max,p indicates the maximum value of the range of possible values of the contention window size CWp for channel access priority class p. The contention window size CWp for channel access priority class p is also referred to as CWp.

When a transmission wave including at least a physical channel (eg, PDSCH) associated with channel access priority class p is transmitted, CWp is managed by the base station device 3 or the terminal device 1, and before step A1 of the counting procedure , the CWp is adjusted (a CWp adjustment procedure is performed).

NR-U (New Radio - Unlicensed) may be applied in a certain component carrier. NR-U may be applied in some serving cells. Applying NR-U in a component carrier (or a serving cell) may include at least a technique (framework, configuration) including some or all of elements A1 to A6 below.
Element A1: The second SS burst set is configured in the certain component carrier (or the certain serving cell). Element A2: The base station device 3 uses the second Element A3 that transmits the SS/PBCH block of the terminal device 1 receives the second SS/PBCH block in the certain component carrier (or the certain serving cell) Element A4: The base station device 3 receives the Element A5 transmitting PDCCH in the second type 0 PDCCH common search area set on the component carrier (or the serving cell): the terminal device 1 transmits the second type 0 PDCCH on the certain component carrier (or the serving cell) In the common search area set, element A6 that receives the PDCCH: higher layer parameters (eg, fields included in the MIB) associated with NR-U indicate a first value (eg, 1)

NR-U (New Radio - Unlicensed) may not be applied to a certain component carrier. In some serving cells, NR-U may not apply. Not applying NR-U in a component carrier (or a serving cell) may include at least a technique (framework, configuration) including some or all of elements B1 to B6 below.
Element B1: The first SS burst set is configured in the certain component carrier (or the certain serving cell). Element B2: The base station device 3 uses the first Element B3 that transmits the SS/PBCH block of: The terminal device 1 receives the first SS/PBCH block in the certain component carrier (or the certain serving cell) Element B4: The base station device 3 receives the Element B5 transmitting PDCCH in the first type 0 PDCCH common search area set on the component carrier (or the serving cell): the terminal device 1 transmits the first type 0 PDCCH on the component carrier (or the serving cell) In the common search area set, the element B6 that receives the PDCCH: the higher layer parameter (eg, a field included in the MIB) associated with NR-U indicates a different value (eg, 0) from the first value

Certain component carriers may be configured in licensed bands. A serving cell may be configured in a licensed band. Here, setting a certain component carrier (or a certain serving cell) to the licensed band may include at least some or all of the following setting 1 to setting 3.
Configuration 1: Higher-layer parameters indicating that a component carrier (or a serving cell) operates in a licensed band, or an unlicensed band for a component carrier (or a serving cell) ) Configuration 2: A component carrier (or a serving cell) is configured to operate in the licensed band, or is configured to operate in the unlicensed band, A certain component carrier (or a certain serving cell) is not configured Configuration 3: A certain component carrier (or a certain serving cell) is included in the licensed band, or a certain component carrier (or a certain serving cell) is not included in the unlicensed band

A licensed band may be a band such that a radio station license is required for terminals operating (or expected to operate) in the licensed band. The licensed band may be a band in which only terminal devices manufactured by operators (entities, businesses, groups, corporations) holding radio station licenses are permitted to operate. An unlicensed band may be a band such that no channel access procedure is required prior to transmission of the physical signal.

An unlicensed band may be a band such that a radio station license is not required for terminals operating (or expected to operate) in the unlicensed band. An unlicensed band is a band in which terminal devices manufactured by some or all of operators with radio station licenses and/or operators without radio station licenses are permitted to operate. good. An unlicensed band may be a band such that a channel access procedure is required prior to transmission of physical signals.

Whether or not NR-U is applied to a certain component carrier (or a certain serving cell) is at least a band that the certain component carrier (or the certain serving cell) can operate in an unlicensed band (for example, an unlicensed band may be determined based on whether or not it is set to a band that can be operated only in For example, a list of bands designed for NR or NR carrier aggregation may be defined. For example, if one or more bands in the list are included in bands that can operate in unlicensed bands (for example, bands that can only operate in unlicensed bands), the band has an NR-U. may be applied. Also, if one or more bands in the list are not included in bands that can operate in unlicensed bands (for example, bands that can only operate in unlicensed bands), a NR-U may not apply and normal NRs (eg, Release 15 NRs or NRs other than Release 16 NR-U) may apply.

Whether or not NR-U is applied to a component carrier (or a serving cell) is at least the component carrier (or the serving cell) is a band in which NR-U can operate (for example, only in NR-U operable band). For example, a list of bands for which NR or NR carrier aggregation is designed for operation may be specified, and one or more bands in the list may be NR-U-operable bands (e.g., NR-U only operation possible band), if the band configured for the component carrier (or its serving cell) is any of the one or more bands, NR-U is applied, For bands other than one or more bands, NR-U may not apply and normal NR (eg, Release 15 NR, or NR other than Release 16 NR-U) may apply.

Whether NR-U is applied to a component carrier (or a serving cell) is determined by system information (eg, Master Information
It may be determined based on information included in n Block (MIB or Physical Broadcast Channel (PBCH)). For example, if the MIB contains information indicating whether or not to apply NR-U, and the information indicates that NR-U is applied, for the serving cell to which the MIB corresponds, NR- U may be applied. On the other hand, if the information does not indicate that NR-U is applied, NR-U may not be applied and normal NR may be applied to the serving cell to which the MIB corresponds. Alternatively, the information may indicate whether or not it is operable in unlicensed bands.

Certain component carriers may be configured in unlicensed bands. A serving cell may be configured in an unlicensed spectrum. Here, setting a certain component carrier (or a certain serving cell) to an unlicensed band may include at least some or all of the following settings 4 to 6.
Configuration 4: A certain component carrier (or a serving cell) is given an upper layer parameter indicating that it operates in an unlicensed band Configuration 5: A certain component carrier (or a certain serving cell) operates in an unlicensed band ) is set Configuration 6: A certain component carrier (or a certain serving cell) is included in the unlicensed band

The following description assumes that the component carrier is set to the licensed band or set to the unlicensed band. Note that "the component carrier is set to the licensed band" may be "the serving cell is set to the licensed band", and "the component carrier is set to the unlicensed band" may be " The serving cell may be set to an unlicensed band."

Whether the terminal device 1 receives the first SS/PBCH block or the second SS/PBCH block in a certain component carrier depends on whether NR-U is applied in the certain component carrier. and based at least in part or in whole on whether the certain component carrier is configured in an unlicensed band.

For example, the terminal device 1 may receive the first SS/PBCH block if a component carrier is configured in the licensed band. Also, when a certain component carrier is configured in the licensed band, the terminal device 1 may receive the first PDCCH in the first type 0 PDCCH common search region set. Also, when a certain component carrier is set in the licensed band, the base station device 3 may transmit the first SS/PBCH block. Also, when a certain component carrier is set in the licensed band, the base station device 3 may receive the first PDCCH in the first type 0 PDCCH common search area set.

The terminal device 1 may receive a second SS/PBCH block if a component carrier is configured in the unlicensed band. Also, when a component carrier is configured in the unlicensed band, the terminal device 1 may receive the second PDCCH in the second type 0 PDCCH common search region set. Also, when a certain component carrier is set to the unlicensed band, the base station device 3 may transmit the second SS/PBCH block. Also, when a certain component carrier is set in the unlicensed band, the base station device 3 may receive the second PDCCH in the second type 0 PDCCH common search area set.

For example, the terminal device 1 may receive the first SS/PBCH block when NR-U is not applied in a certain component carrier and the component carrier is set to the licensed band. Also, when NR-U is not applied in a certain component carrier and the component carrier is set to the licensed band, the terminal device 1 receives the first PDCCH in the first type 0 PDCCH common search region set. may Also, when NR-U is not applied to a certain component carrier and the component carrier is set as a licensed band, the base station device 3 may transmit the first SS/PBCH block. Also, when NR-U is not applied to a certain component carrier and the component carrier is set to the licensed band, the base station device 3 receives the first PDCCH in the first type 0 PDCCH common search area set. You may

For example, the terminal device 1 may receive the second SS/PBCH block if NR-U is not applied in a component carrier and the component carrier is set to an unlicensed band. Also, when NR-U is not applied in a certain component carrier and the component carrier is set to an unlicensed band, the terminal device 1 receives the first PDCCH in the second type 0 PDCCH common search region set. You may Also, when NR-U is not applied to a certain component carrier and the component carrier is set to an unlicensed band, the base station device 3 may transmit the second SS/PBCH block. Also, when NR-U is not applied in a certain component carrier and the component carrier is set to an unlicensed band, the base station device 3 selects the first PDCCH in the second type 0 PDCCH common search region set. may receive.

For example, when NR-U is applied in a certain component carrier and the component carrier is set as a licensed band, the terminal device 1 may receive the second SS/PBCH block. Also, when NR-U is applied in a certain component carrier and the component carrier is set to the licensed band, the terminal device 1 receives the first PDCCH in the second type 0 PDCCH common search area set. good too. Also, when NR-U is applied to a certain component carrier and the component carrier is set as a licensed band, the base station device 3 may transmit the second SS/PBCH block. Also, when NR-U is applied to a certain component carrier and the component carrier is set to the licensed band, the base station device 3 receives the first PDCCH in the second type 0 PDCCH common search area set. may

For example, the terminal device 1 may receive the second SS/PBCH block when NR-U is applied in a component carrier and the component carrier is set to an unlicensed band. Also, when NR-U is applied in a component carrier and the component carrier is set to an unlicensed band, the terminal device 1 receives the first PDCCH in the second type 0 PDCCH common search area set. may Also, when NR-U is applied to a certain component carrier and the component carrier is set to an unlicensed band, the base station device 3 may transmit the second SS/PBCH block. Also, when NR-U is applied to a certain component carrier and the component carrier is set to an unlicensed band, the base station device 3 receives the first PDCCH in the second type 0 PDCCH common search area set. You may

For example, if the subcarrier spacing of the first SS/PBCH block is 30 kHz (if the subcarrier spacing setting μ=1 for the first SS/PBCH block), then the SS/PBCH included in a half radio frame The number of block candidates may be eight. Also, when the subcarrier spacing of the first SS/PBCH block is 30 kHz, the first OFDM of the first SS/PBCH block candidate with index {0, 1, 2, 3, 4, 5, 6, 7} The symbol indices l ^hrf _sym may be {2, 8, 16, 22, 30, 36, 44, 50}, respectively.

The interval between Type 0 PDCCH common search region sets corresponding to the first SS/PBCH block may be 20 ms. The type 0 PDCCH common search area set spacing corresponding to the first SS/PBCH block may not be indicated by the PBCH (or MIB) included in the first SS/PBCH block. The type 0 PDCCH common search area set corresponding to the first SS/PBCH block may be the search area set configured by the PBCH (or MIB) included in the first SS/PBCH block.

For example, if the subcarrier spacing of the second SS/PBCH block is 30 kHz (if the subcarrier spacing setting μ=1 for the second SS/PBCH block), then the SS/PBCH included in a half radio frame The number of block candidates may be twenty. And if the subcarrier spacing of the second SS/PBCH block is 30 kHz, index {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 , 15, 16, 17, 18, 19}, the leading OFDM symbol indices l ^hrf _sym of the second SS/PBCH block candidates are {2, 8, 16, 22, 30, 36, 44, 50, 58, 64, 72, 78, 86, 92, 100, 106, 114, 120, 128, 134}. Also, if the subcarrier spacing of the second SS/PBCH block is 30 kHz, the leading OFDM symbol index l ^hrf _sym of the second SS/PBCH block candidate with index 2n (even index) is 2+14n. good. Also, if the subcarrier spacing of the second SS/PBCH block is 30 kHz, the leading OFDM symbol index l ^hrf _sym of the second SS/PBCH block candidate with index 2n+1 (radix index) is 8+14n. good.

For example, if the subcarrier spacing of the second SS/PBCH block is 30 kHz, index {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 , 15, 16, 17, 18, 19}, the leading OFDM symbol indices l ^hrf _sym of the second SS/PBCH block candidates are {2, 9, 16, 23, 30, 37, 44, 51, 58, 65, 72, 79, 86, 93, 100, 107, 114, 121, 128, 135}. Also, if the subcarrier spacing of the second SS/PBCH block is 30 kHz, the leading OFDM symbol index l ^hrf _sym of the second SS/PBCH block candidate with index 2n+1 (radix index) is 9+14n. good.

FIG. 10 is a diagram illustrating a configuration example of an SS burst set according to one aspect of the present embodiment. In FIG. 10, the horizontal axis is the half radio frame index, and the square blocks indicate the SS burst sets. In FIG. 10, it is assumed that the SS burst set interval is 20 ms, but the SS burst set interval may be 5 ms, 10 ms, or 20 ms. However, other values corresponding to integral multiples of 5 ms may be used.

The interval between SS burst sets may be set by higher layer parameters, but if the terminal device 1 is not provided with higher layer parameters (for example, in a cell search procedure, etc.), the SS assumed by the terminal device 1 is An initial value for the interval of burst sets is preferably provided. The initial value for the interval of the first SS burst set containing the first SS/PBCH block is 20 ms. The initial value of the interval of the second SS burst set containing the second SS/PBCH block may be 20 ms, 40 ms, or any other value corresponding to an integer multiple of 5 ms. may

The initial value of the SS burst set interval may be equal to the type 0 PDCCH common search area set interval (initial value of the type 0 PDCCH common search area set interval). The initial value of the SS burst set interval may be equivalent to the type 0 PDCCH common search area set interval. The initial value of the SS burst set interval may be the type 0 PDCCH common search area set interval.

The type 0 PDCCH common search area set spacing corresponding to the second SS/PBCH block may be indicated by the PBCH (or MIB) included in the second SS/PBCH block. The type 0 PDCCH common search area set corresponding to the second SS/PBCH block may be the search area set configured by the PBCH (or MIB) included in the second SS/PBCH block.

FIG. 10 shows four types of SS burst set arrangement patterns. Pattern A is a pattern in which an SS burst set is arranged at index n+4x, pattern B is a pattern in which an SS burst set is arranged at index n+4x+1, and pattern C is index n+4x+
2, and pattern D (pattern D) is a pattern in which the SS burst set is arranged at index n+4x+3.

FIG. 11 is a diagram illustrating a configuration example of an SS burst set according to one aspect of the present embodiment. In FIG. 11, the horizontal axis is the half radio frame index, and the square blocks indicate the SS burst sets. In FIG. 11, it is assumed that the SS burst set interval is 40 ms.

In FIG. 11, arrangement patterns of eight types of SS burst sets are shown. Pattern A is a pattern in which an SS burst set is arranged at index n+8x, pattern B is a pattern in which an SS burst set is arranged at index n+8x+1, and pattern C is index n+8x+
2 is a pattern in which an SS burst set is arranged, pattern D is a pattern in which an SS burst set is arranged at index n+8x+3, and pattern E is a pattern in which an SS burst set is arranged at index n+8x+4. pattern F is a pattern in which the SS burst set is placed at index n+8x+5; pattern G is a pattern at index n+8x+
6 is a pattern in which the SS burst set is arranged, and pattern H (pattern H) is a pattern in which the SS burst set is arranged at index n+8x+7.

Preferably, in the unlicensed band, a type 0 PDCCH common search area set is configured around the slot in which the SS/PBCH block is transmitted. This simplifies the channel access procedure by collectively transmitting the SS/PBCH block, the PDSCH used for conveying broadcast information such as system information, and the PDCCH used for scheduling the PDSCH on the time domain. It is for realization. That is, for example, it is preferable to allocate the type 0 PDCCH common search region set for each of pattern A, pattern B, pattern C, and pattern D SS burst set allocation.

For example, when the terminal device 1 receives the second SS/PBCH block in the second SS/PBCH block candidate with index X arranged in a certain slot, the second SS/PBCH block with index X The type 0 PDCCH common search area set monitoring opportunity corresponding to the candidate may be signaled to be located in a slot shifted by a time corresponding to an integer number of half radio frames from the one slot.

FIG. 12 is a diagram illustrating an example method for setting monitoring occasions for a type 0 PDCCH common search region set according to an aspect of the present embodiment. In FIG. 12, the horizontal axis is the half radio frame index, the square blocks indicate the SS burst sets, and the hatched blocks indicate the type 0 PDCCH common search area sets corresponding to certain SS/PBCH block candidates. As shown in FIG. 12, when the second SS/PBCH block candidate of index X included in the half radio frame of index n receives the second SS/PBCH block, the second SS/PBCH block candidate corresponds to the second SS/PBCH block candidate. Preferably, the second type 0 PDCCH common search region set is located at least at either index n, index n+1, index n+2 or index n+3. Whether the second type 0 PDCCH common search region set is located at index n, index n+1, index n+2 or index n+3 may be given based on at least higher layer parameters. Whether the second type 0 PDCCH common search region set is located at index n, index n+1, index n+2, or index n+3 may be given based on at least the PBCH (or MIB).

FIG. 13 is a diagram illustrating an example method for setting monitoring occasions for a type 0 PDCCH common search region set according to an aspect of the present embodiment. In FIG. 13, the horizontal axis is the half radio frame index, the square blocks indicate the SS burst sets, and the hatched blocks indicate the type 0 PDCCH common search area sets corresponding to certain SS/PBCH block candidates. As shown in FIG. 13, when the second SS/PBCH block candidate of index X included in the half radio frame of index n+1 receives the second SS/PBCH block, the second SS/PBCH block candidate corresponds to the second SS/PBCH block candidate. Preferably, the second type 0 PDCCH common search region set is located at least at either index n+1, index n+2, index n+3 or index n+4. Whether the second type 0 PDCCH common search region set is located at index n+1, index n+2, index n+3, or index n+4 may be given based on at least higher layer parameters. Whether the second type 0 PDCCH common search region set is located at index n+1, index n+2, index n+3, or index n+4 may be given based on at least the PBCH (or MIB).

Here, when the initial value of the interval of the second SS burst set is N _burst * 5 ms, and the terminal device 1 receives the SS/PBCH block in a certain slot of a half radio frame, the type 0 PDCCH common search area set The slot in which the monitoring opportunity is placed may be a slot shifted from the one slot by a time corresponding to O _burst times a half radio frame. Here, O _burst may be anywhere from 0 to N _burst −1. O _burst may also be provided based at least on higher layer parameters. O _burst may also be given based at least on the PBCH (or MIB). Candidate values for O _burst may include only integer values ranging from 0 to N _burst −1. Candidate values for O _burst may include all integer values ranging from 0 to N _burst −1. The O _burst candidate values are the set of O _burst values that can be signaled based on higher layer parameters. For example, O _burst may be indicated based at least on predetermined higher layer parameters contained in the MIB.

When the initial value of the interval of the second SS burst set is X _duration , and the terminal device 1 receives the SS/PBCH block in a certain slot of a half radio frame, a type 0 PDCCH common search area set monitoring opportunity is arranged. The slot may be a slot moved by a time corresponding to X _duration /T _hrf times X _hrf . T _hrf indicates the duration of a half radio frame. For example, X _hrf may be indicated based at least on predetermined higher layer parameters contained in the MIB.

The slot index n ^μ s,f of the slot in which the type 0 PDCCH common search area set corresponding to the SS/PBCH block candidate with index X is located is n ^μ s _{,f =} mod(O*2^μ+floor(X*M) , N ^{frame, μ} _slot ). Here, O and/or part or all of M may be indicated based at least on higher layer parameters. Also, part or all of O and/or M may be indicated based on at least the PBCH (or MIB). For example, O may be indicated based at least on certain higher layer parameters contained in the MIB.

O may be the time domain offset for the type 0 PDCCH common search region set. O may be a parameter that moves the slot in which the type 0 PDCCH common search region set is located by slots corresponding to an integer multiple of the number of slots (2^μ) included in the subframe.

M may be the time domain offset for the type 0 PDCCH common search region set. M is the second SS of index X from the slot in which the type 0 PDCCH common search region set corresponding to the second SS/PBCH block candidate of index 0 is located;
It may be at least a parameter used to indicate the offset to the slot in which the type 0 PDCCH common search area set corresponding to the /PBCH block candidate is located.

μ may be the subcarrier spacing setting μ for the SS/PBCH block.

For example, if mod(floor((O*2^μ+floor(X*M))/N ^{frame, μ} _slot ), 2)=0, then the type 0 PDCCH common search corresponding to the SS/PBCH block candidate with index X The index n _SFN of the radio frame containing the slot in which the region set is located may satisfy mod(n _SFN ,2)=0. Also, if mod(floor((O*2^μ+floor(X*M))/N ^{frame, μ} _slot ), 2)=1, the type 0 PDCCH common search corresponding to the SS/PBCH block candidate with index X The index n _SFN of the radio frame containing the slot in which the region set is located may satisfy mod(n _SFN ,2)=1.

The candidate values of O may include at least some or all of 0, 2, 5, and 7 for the first SS/PBCH block candidate. For the first SS/PBCH block candidate, the candidate values of M may include at least some or all of 1/2, 1, and 2.

If index X is even, then for the first SS/PBCH block candidate with index X, a type 0 PDCCH common search area set monitoring opportunity corresponding to the first SS/PBCH block candidate with index X is placed. The OFDM symbol index l _sym at the beginning of the OFDM symbols may be zero. Also, if index X is an odd number, then for the first SS/PBCH block candidate with index X, there is an opportunity to monitor the type 0 PDCCH common search area set corresponding to the first SS/PBCH block candidate with index X. The first OFDM symbol index l _sym among the arranged OFDM symbols may be N ^CORESET _symb . N ^CORESET _symb is the number of OFDM symbols included in the control resource set with index 0;

For the second SS/PBCH block candidate, the candidate values of O may include at least some or all of 0, 5, 10, 15, 20, 25, 30, and 35. For the second SS/PBCH block candidate, the O candidate values may include values corresponding to integer multiples of the number of subframes contained in the half radio frame. If the initial value of the interval of the second SS burst set is N _burst * 5ms, then the candidate values for O correspond to integer multiples of the number of subframes contained in the half radio frame, and from 0 to (N _burst −1) May include values included in the range of *5. Each of the O candidate values may correspond to an integer multiple of the number of subframes contained in the half-radio frame and may be in the range 0 to (N _burst -1)*5.

For example, if the initial value for the interval of the second SS burst set is 20 ms (N _burst =4), then the candidate values for O are at least 10 and 15 for the second SS/PBCH block candidates. may contain. Also, if the initial value of the second SS burst set interval is 20 ms (N _burst =4), then for the second SS/PBCH block candidate, the candidate values of O are 0, 5, 10, and , 15 at least. For example, the terminal device 1 may assume that the initial value of the second SS burst set interval is 20 ms, determine O based on the MIB, and configure the type 0 PDCCH common search region set.

For example, if the initial value for the interval of the second SS burst set is 40 ms (N _burst =8), the candidate values for O are 10, 15, 20, 25 for the second SS/PBCH block candidates. , 30, and 35. Also, if the initial value of the interval of the second SS burst set is 40 ms (N _burst =8), the candidate values of O are 0, 5, 10, 15 for the second SS/PBCH block candidate. , 20, 25, 30, and 35. For example, the terminal device 1 may assume that the initial value of the second SS burst set interval is 20 ms, determine O based on the MIB, and configure the type 0 PDCCH common search region set.

For the second SS/PBCH block candidate, the candidate values of M may include at least some or all of 1/2, 1, and 2.

If the index X is even, then for the second SS/PBCH block candidate with index X, a type 0 PDCCH common search area set monitoring opportunity corresponding to the second SS/PBCH block candidate with index X is placed. Candidate values for the first OFDM symbol index l _sym among the OFDM symbols may include at least 0 and part or all of 1. Also, if index X is an odd number, then for the second SS/PBCH block candidate with index X, there is an opportunity to monitor the type 0 PDCCH common search area set corresponding to the second SS/PBCH block candidate with index X. Candidate values for the first OFDM symbol index l _sym among the arranged OFDM symbols may include at least 6 and part or all of 7. FIG.

One half-radio frame may contain Y SS/PBCH block candidates. Y SS/PBCH block candidates may constitute one SS burst set. The initial value of the SS burst set interval may be a predetermined value (eg, N _burst *5 ms). The terminal device 1 may assume that the initial value of the SS burst set interval is the predetermined value at least in the cell search.

The base station apparatus 3 may transmit the SS/PBCH block in the SS/PBCH block candidate of index X in the SS burst set. Here, a slot in which the SS/PBCH block candidate with the index X is allocated is called an SS slot.

The terminal device 1 may detect the SS/PBCH block in the SS/PBCH block candidate of the index X.

The terminal device 1 may configure monitoring opportunities for the type 0 PDCCH common search region set corresponding to the SS/PBCH block candidate with the index X based on at least the PBCH (or MIB) included in the SS/PBCH block. good. Here, the slot in which the monitoring opportunity of the type 0 PDCCH common search area set is configured is called a monitoring opportunity slot.

The difference (offset) between the index of the SS slot and the monitoring opportunity slot is O*2^μ, and the candidate value of O corresponds to an integer multiple of the number of subframes included in the half radio frame. At least a value included in the range of (N _burst -1)*5 may be included. For example, if the initial value of the SS burst set interval is 20 ms (N _burst =4), the candidate values of O may include at least 10 and 15 for the SS/PBCH block candidates. Also, if the initial value of the SS burst set interval is 20 ms (N _burst =4), then the candidate value of O is one of 0, 5, 10, and 15 for the SS/PBCH block candidate. It may include at least part or all.

Also, if the initial value of the SS burst set interval is 40 ms (N _burst =8), then for the SS/PBCH block candidates, the candidate values of O are 10, 15, 20, 25, 30, and , 35. Also, if the initial value of the interval of the SS burst set is 40 ms (N _burst =8), the candidate values of O are 0, 5, 10, 15, 20, 25 for the SS/PBCH block candidates. , 30 and 35 may be included at least in part or in whole.

Here, the slot in which the SS/PBCH block candidate with index 0 is installed is called a reference SS slot. A difference of the SS slot from the reference SS slot may be given based at least on M. For example, the difference of the SS slot from the reference SS slot may be given by floor(X*M).

Here, a half radio frame including the SS slot is called an SS half radio frame. A half radio frame including the monitoring opportunity slot is called a monitoring opportunity half radio frame. The difference from the SS half-radio frame to the monitoring opportunity half-radio frame can be anywhere from 0 to N _burst -1 half-radio frames.

FIG. 14 is a diagram illustrating an example of downlink communication according to one aspect of the present embodiment. In FIG. 14, the horizontal axis is the half radio frame index, the square blocks indicate the SS burst sets, and the hatched blocks indicate the type 0 PDCCH common search area sets corresponding to certain SS/PBCH block candidates. Here, the SS burst set 1101 is an SS burst set that does not include the type 0 PDCCH common search area set. Also, SS burst set 1102 and SS burst set 1103 are SS burst sets including type 0 PDCCH common search area set 1104 .

The SS burst set 1101 may be an aperiodically arranged SS burst set. For example, the transmission of SS/PBCH blocks in one or more SS/PBCH block candidates included in SS burst set 1101 may be provided based at least on the DCI format and/or higher layer parameters. For example, the DCI format may indicate downlink assignments. Also, the DCI format may be included in PDCCH 1106 . The PDCCH 1106 may be a GC-PDCCH (Group Common-Physical Downlink Control CHannel).

The SS/PBCH block candidates included in the SS burst set 1101 may be given permission to transmit the SS/PBCH block based on the second channel access procedure.

The SS burst set 1101 is also called a cell non-defined SS burst set. A cell undefined SS burst set may be an SS burst set that does not include the type 0 PDCCH common search area set 1104 .

SS burst set 1102 and SS burst set 1103 may be periodically arranged SS burst sets.

SS burst set 1102 and SS burst set 1103 are also referred to as cell-defined SS burst sets. A cell-defined SS burst set may be an SS burst set that includes the type 0 PDCCH common search area set 1104 .

The SS/PBCH block candidates included in either the SS burst set 1102 or the SS burst set 1103 may be given permission to transmit the SS/PBCH block based on the first channel access procedure.

The candidate values of O may include at least 0 for SS/PBCH block candidates included in the cell-defined SS burst set. The SS/PBCH blocks transmitted in the SS/PBCH block candidates included in the cell-defined SS burst set may indicate O=0.

The candidate values of O may include at least 5, 10, and 15 for the SS/PBCH block candidates included in the cell-defined SS burst set, if the initial value of the SS burst set interval is 20 ms. If the initial value of the SS burst set interval is 40 ms, the candidate values of O are 5, 10, 15, 20, 25, 30, and 40 ms for the SS/PBCH block candidates included in the cell-defined SS burst set. , 35. If the initial value of the interval of the SS burst set is N _burst * 5 ms, for the SS/PBCH block candidates included in the cell-defined SS burst set, the candidate value of O corresponds to an integer multiple of half radio frames; In addition, it may include at least a value within the range from 0 to (N _burst -1)*5.

If the initial value of the SS burst set interval is 20 ms, then any of O=5, 10 and 15 may be used for the SS/PBCH block candidates included in the cell defined SS burst set. If the initial value of the SS burst set interval is 40 ms, then O=5, 10, 15, 20, 25, 30, and 35 for the SS/PBCH block candidates included in the cell-defined SS burst set. or may be used. If the initial value of the SS burst set interval is N _burst * 5 ms, then O corresponds to an integer multiple of half radio frames, and 0 for the SS/PBCH block candidates included in the cell-defined SS burst set. to (N _burst -1)*5 may be used.

The PBCH included in the SS/PBCH blocks in the SS/PBCH block candidates included in the SS burst set 1101 and/or the MIB may indicate that the SS burst set 1101 is not populated with the type 0 PDCCH common search area set 1104. . For example, a certain higher layer parameter included in the MIB may be set to a certain value to indicate that the SS burst set 1101 is not populated with the type 0 PDCCH common search region set 1104 .

For example, the predetermined higher layer parameter may be a higher layer parameter that is used at least to indicate the control resource set with index 0. Also, the predetermined higher layer parameter may be a higher layer parameter used at least to indicate the type 0 PDCCH common search region set 1104 .

The predetermined higher layer parameters are that the SS burst set 1101 is not provided with search area set monitoring opportunities and the cell defining SS/PBCH block is placed at the same center frequency as the SS burst set. You can show that

A cell-defined SS/PBCH block may be an SS/PBCH block containing a MIB containing higher layer parameters indicating the configuration of a type 0 PDCCH common search area set. A cell-defined SS/PBCH block may be an SS/PBCH block containing a MIB containing higher layer parameters indicating the configuration of a type 0 PDCCH common search area set for PDCCH scheduling PDSCH containing SIB1. The type 0 PDCCH common search region set configuration may be a configuration including at least O and M for the type 0 PDCCH common search region set.

A higher layer parameter indicating the configuration of the control resource set with index 0 and type 0PD
The upper layer parameters indicating the setting of the CCH common search area set are also collectively referred to as the upper layer parameter pdcch-configSIB1. The higher layer parameter pdcch-configSIB1 may be used to signal the global synchronization channel number (GSCN) when the subcarrier offset indicated by PBCH indicates a predetermined value. When the subcarrier offset indicated by the PBCH included in the SS/PBCH block in the SS/PBCH block candidate included in the SS burst set 1101 indicates a predetermined value, the higher layer parameter pdcch-configSIB1 may indicate GSCN=0. good. GSCN=0 may indicate that the cell-defined SS/PBCH block is located at the center frequency (or sync channel raster number) of that SS/PBCH block.

The PDCCH 1106 may be used to indicate information indicating the transmission direction (SFI: slot format indicator) for each OFDM symbol included in a certain slot set.

It may be indicated based at least on the PDCCH 1106 that the SS burst set is placed in a half radio frame. For example, it may be indicated that the SS burst set is placed in the half radio frame in which the PDCCH 1106 is transmitted. It may also be indicated that the SS burst set is arranged in the half radio frame following the half radio frame in which the PDCCH 1106 is transmitted. Also, the half radio frame in which the SS burst set is placed may be provided based at least on the PDCCH 1106 .

When the PDCCH 1106 indicates that an SS burst set is arranged in a certain half radio frame, and the PDCCH 1106 is used for scheduling the PDSCH in the certain half radio frame, the PDSCH is the SS/ It may be mapped avoiding the resource elements used for some or all of the PBCH block candidates.

For example, in the cell search procedure, the terminal device 1 detects SS/PBCH blocks in SS/PBCH block candidates included in the SS burst set 1101 transmitted aperiodically. However, the aperiodically transmitted SS burst set 1101 may not include the type 0 PDCCH common search region set 1104 . Here, the terminal device 1 is based on at least the PBCH (or MIB) included in the SS / PBCH block, the type 0 PDCCH common search region set 1104 is periodically transmitted SS burst set 1102, and / or It recognizes that it is included in the periodically transmitted SS burst set 1103 . As a result, even when the terminal device 1 detects an SS/PBCH block in the SS/PBCH block candidate included in the SS burst set that does not include the type 0 PDCCH common search area set 1104 in the cell search procedure, the type 0 PDCCH common search area set 1104 is appropriately detected. A search area set 1104 can be established.

Various device aspects according to one aspect of the present embodiment will now be described.

(1) In order to achieve the above objects, the aspects of the present invention take the following measures. That is, a first aspect of the present invention is a terminal device, and includes in the n-th SS/PBCH block of the SS burst set configured by Y SS/PBCH candidates included in the half radio frame. a receiver for receiving a PBCH; and a higher layer processor for setting a first monitoring opportunity for a first set of search areas in a first slot based at least on fields included in the PBCH, wherein the SS burst The initial value of the period of the set corresponds to N _burst times the half radio frame, and the offset from the second slot, which is the first slot of the system frame with index j, to said first slot is O*2^ μ, said O given at least based on said PBCH, candidate values of said O corresponding to integer multiples of the number of subframes included in said half radio frame, and from 0 to (N _burst -1) At least a value included in the range of *5 is included, and the µ is given based on the setting of the subcarrier spacing of the PBCH.

(2) Also, in the first aspect of the present invention, candidate values for O include at least 10 and 15 when μ is 1.

(3) In addition, a second aspect of the present invention is a terminal device, and out of an SS burst set composed of Y SS/PBCH candidates included in a half radio frame, the n-th SS/PBCH block and a higher layer processing unit for setting a first monitoring opportunity for a first search area set based at least on fields included in the PBCH, wherein the SS burst set is If it is the first SS burst set, the higher layer processing unit sets the first monitoring occasion based on fields included in the SS/PBCH block, and the SS burst set is the second SS burst set. , the field does not indicate the setting of the search area set, and the field indicates that there is a cell-defined SS/PBCH block on the same center frequency as the SS/PBCH block, and the cell-defined SS The /PBCH block indicates setting of the first monitoring occasion.

(4) In addition, a third aspect of the present invention is a base station apparatus, in an SS burst set configured by Y SS/PBCH candidates included in a half radio frame, the n-th SS/PBCH a transmitting unit for transmitting a PBCH included in a block; and a higher layer processing unit for setting a first monitoring opportunity for a first search area set in a first slot based at least on fields included in the PBCH. , the initial value of the period of the SS burst set corresponds to N _burst times a half radio frame, and the offset from the second slot, which is the first slot of the system frame with index j, to the first slot is O*2^μ, where O is given based at least on the PBCH, candidate values for O correspond to integer multiples of the number of subframes included in the half radio frame, and from 0 to (N _burst -1)*5, and the μ is given based on the setting of the subcarrier spacing of the PBCH.

(5) Also, in the third aspect of the present invention, candidate values for O include at least 10 and 15 when μ is 1.

(6) In addition, a fourth aspect of the present invention is a base station apparatus, in an SS burst set configured by Y SS/PBCH candidates included in a half radio frame, the n-th SS/PBCH a transmitting unit for transmitting a PBCH included in a block; and a higher layer processing unit for setting a first monitoring opportunity for a first search area set based at least on fields included in the PBCH, wherein the SS burst set. is the first SS burst set, the upper layer processing unit sets the first monitoring occasion based on fields included in the SS/PBCH block, and the SS burst set is the second SS burst set, the field does not indicate the setting of the search area set, and the field indicates that there is a cell-defined SS/PBCH block on the same center frequency as the SS/PBCH block, and the cell-defined The SS/PBCH block indicates the setting of the first monitoring occasion.

A program that operates on the base station device 3 and the terminal device 1 according to the present invention is a program that controls a CPU (Central Processing Unit) etc. program). Information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HD.
It is stored in D (Hard Disk Drive), and is read, corrected, and written by the CPU as necessary.

A part of the terminal device 1 and the base station device 3 in the above-described embodiment may be implemented by a computer. In that case, a program for realizing this control function may be recorded in a computer-readable recording medium, and the program recorded in this recording medium may be read into 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. The term "computer-readable recording medium" refers to portable media such as flexible discs, magneto-optical discs, ROMs and CD-ROMs, and storage devices such as hard discs incorporated in computer systems.

Furthermore, "computer-readable recording medium" means a medium that dynamically stores a program for a short period of time, such as a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line. In that case, it may also include a memory that holds the program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client. Further, the program may be for realizing part of the functions described above, or may be capable of realizing the functions described above in combination with a program already recorded in the computer system.

Also, the base station device 3 in the above-described embodiment can 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 functional block of the base station device 3 related to the above-described embodiments. A device group may have a series of functions or functional blocks of the base station device 3 . Also, the terminal device 1 according to the above-described embodiments can communicate with a base station device as a group.

Also, 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). Also, the base station device 3 in the above-described embodiment may have some or all of the functions of an upper node for eNodeB and/or gNB.

Also, part or all of the terminal device 1 and the base station device 3 in the above-described embodiments may be typically implemented as an LSI, which is an integrated circuit, or may be implemented as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually chipped, or part or all of them may be integrated and chipped. Also, the method of circuit integration is not limited to LSI, but may be realized by a dedicated circuit or a general-purpose processor. In addition, when a technology for integrating circuits to replace LSIs emerges due to advances in semiconductor technology, it is possible to use an integrated circuit based on this technology.

In addition, in the above-described embodiments, a terminal device was described as an example of a communication device, but the present invention is not limited to this. 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 household equipment.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like are included within the scope of the present invention. In addition, the present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. be Moreover, it is an element described in each said embodiment, and the structure which replaced the element with which the same effect is produced is also included.

1 (1A, 1B, 1C) terminal device 3 base station devices 10, 30 radio transmitting/receiving units 11, 31 antenna units 12, 32 RF units 13, 33 baseband units 14, 34 upper layer processing units 15, 35 medium access control layer Processing units 16, 36 Radio resource control layer processing units 91, 92, 93, 94 Search area set 300 Component carrier 301 Primary cells 302, 303 Secondary cells 1101, 1102, 1103 SS burst set 1104 Type 0 PDCCH common search area set 1106 PDCCH
3000 Points 3001, 3002 Resource Grids 3003, 3004 BWP
3011, 3012, 3013, 3014 offsets 3100, 3200 common resource block set

Claims (10)

a receiver for receiving the PBCH included in the n-th SS/PBCH block in the SS burst set configured by Y SS/PBCH candidates included in the half radio frame;
a higher layer processing unit for setting a first monitoring opportunity for a first set of search areas in a first slot based at least on fields included in the PBCH;
the initial value of the period of the SS burst set corresponds to N _burst times a half radio frame;
The offset from the second slot, which is the leading slot of the system frame with index j, to the first slot is O*2^μ,
The O is given at least based on the PBCH, the candidate value of O corresponds to an integer multiple of the number of subframes included in the half radio frame, and ranges from 0 to (N _burst -1) * 5 contains at least the value contained in
The μ is given based on the setting of the subcarrier interval of the PBCH Terminal device. The terminal device according to claim 1, wherein when the μ is 1, candidate values for the O include at least 10 and 15. a receiver for receiving the PBCH included in the n-th SS/PBCH block in the SS burst set configured by Y SS/PBCH candidates included in the half radio frame;
a higher layer processing unit for setting a first monitoring opportunity for a first search area set based at least on fields included in the PBCH;
if the SS burst set is the first SS burst set, the higher layer processing unit sets the first monitoring opportunity based on fields included in the SS/PBCH block;
If the SS burst set is a second SS burst set, then the field does not indicate the setting of the search area set, and the field contains a cell-defined SS/PBCH at the same center frequency as the SS/PBCH block. indicate that there is a block,
The cell-defined SS/PBCH block indicates the configuration of the first monitoring occasion Terminal device. a transmitting unit that transmits the PBCH included in the n-th SS/PBCH block in the SS burst set composed of Y SS/PBCH candidates included in the half radio frame;
a higher layer processing unit for setting a first monitoring opportunity for a first set of search areas in a first slot based at least on fields included in the PBCH;
the initial value of the period of the SS burst set corresponds to N _burst times a half radio frame;
The offset from the second slot, which is the leading slot of the system frame with index j, to the first slot is O*2^μ,
The O is given at least based on the PBCH, the candidate value of O corresponds to an integer multiple of the number of subframes included in the half radio frame, and ranges from 0 to (N _burst -1) * 5 contains at least the value contained in
The μ is given based on setting of subcarrier intervals of the PBCH. Base station apparatus. 5. The base station apparatus according to claim 4, wherein when the μ is 1, candidate values for the O include at least 10 and 15. a transmitting unit that transmits the PBCH included in the n-th SS/PBCH block in the SS burst set composed of Y SS/PBCH candidates included in the half radio frame;
a higher layer processing unit for setting a first monitoring opportunity for a first search area set based at least on fields included in the PBCH;
if the SS burst set is the first SS burst set, the higher layer processing unit sets the first monitoring opportunity based on fields included in the SS/PBCH block;
If the SS burst set is a second SS burst set, then the field does not indicate the setting of the search area set, and the field contains a cell-defined SS/PBCH at the same center frequency as the SS/PBCH block. indicate that there is a block,
The cell definition SS/PBCH block indicates setting of the first monitoring opportunity. Base station apparatus. A communication method used in a terminal device,
receiving a PBCH included in the n-th SS/PBCH block of an SS burst set composed of Y SS/PBCH candidates included in a half radio frame;
setting a first monitoring opportunity for a first set of search areas in a first slot based at least on fields included in the PBCH;
the initial value of the period of the SS burst set corresponds to N _burst times a half radio frame;
The offset from the second slot, which is the leading slot of the system frame with index j, to the first slot is O*2^μ,
The O is given at least based on the PBCH, the candidate value of O corresponds to an integer multiple of the number of subframes included in the half radio frame, and ranges from 0 to (N _burst -1) * 5 contains at least the value contained in
The μ is given based on setting of subcarrier intervals of the PBCH. Communication method. A communication method used in a terminal device,
receiving a PBCH included in the n-th SS/PBCH block of an SS burst set composed of Y SS/PBCH candidates included in a half radio frame;
setting a first monitoring opportunity for a first set of search areas based at least on fields included in the PBCH;
if the SS burst set is the first SS burst set, then set the first monitoring occasion based on fields included in the SS/PBCH block;
If the SS burst set is a second SS burst set, then the field does not indicate the setting of the search area set, and the field contains a cell-defined SS/PBCH at the same center frequency as the SS/PBCH block. indicate that there is a block,
The method of communication, wherein the cell-defined SS/PBCH block indicates the configuration of the first monitoring occasion. A communication method used in a base station device,
transmitting the PBCH included in the n-th SS/PBCH block in the SS burst set composed of Y SS/PBCH candidates included in the half radio frame;
setting a first monitoring opportunity for a first set of search areas in a first slot based at least on fields included in the PBCH;
the initial value of the period of the SS burst set corresponds to N _burst times a half radio frame;
The offset from the second slot, which is the leading slot of the system frame with index j, to the first slot is O*2^μ,
The O is given at least based on the PBCH, the candidate value of O corresponds to an integer multiple of the number of subframes included in the half radio frame, and ranges from 0 to (N _burst -1) * 5 contains at least the value contained in
The μ is given based on setting of subcarrier intervals of the PBCH. Communication method. A communication method used in a base station device,
transmitting the PBCH included in the n-th SS/PBCH block in the SS burst set composed of Y SS/PBCH candidates included in the half radio frame;
setting a first monitoring opportunity for a first set of search areas based at least on fields included in the PBCH;
if the SS burst set is the first SS burst set, then set the first monitoring occasion based on fields included in the SS/PBCH block;
If the SS burst set is a second SS burst set, then the field does not indicate the setting of the search area set, and the field contains a cell-defined SS/PBCH at the same center frequency as the SS/PBCH block. indicate that there is a block,
The method of communication, wherein the cell-defined SS/PBCH block indicates the configuration of the first monitoring occasion.

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