WO2020218343A1 - Terminal device, base station device, and communication method - Google Patents

Abstract

The initial value of the period of an SS burst set corresponds to Nburst times a half radio frame. An offset from a second slot, which is the slot at the head of a system frame with an index j, to a first slot is O*2^μ, where O is given at least on the basis of the PBCH, where candidate values of O correspond to integer multiples of the number of sub-frames included in the half radio frame and include at least a value included in a range of from zero to (Nburst-1)*5, and where μ is given on the basis of a sub-carrier interval setting of the PBCH.

Description

Terminal equipment, base station equipment, and communication methods

The present invention relates to a terminal device, a base station device, and a communication method.
The present application claims priority with respect to Japanese Patent Application No. 2019-084268 filed in Japan on April 25, 2019, the contents of which are incorporated herein by reference.

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

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

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

(1) The first aspect of the present invention is a terminal device, which is included in the nth SS / PBCH block of the SS burst set composed of Y SS / PBCH candidates included in the half radio frame. The SS includes a receiving unit that receives the PBCH and an upper layer processing unit that sets a first monitoring opportunity of the first search area set in the first slot based on at least a field included in the PBCH. The initial value of the burst set cycle corresponds to N _burst times of the half radio frame, and the offset from the second slot, which is the first slot of the system frame of index j, to the first slot is O * 2. ^ Μ, the O is given at least based on the PBCH, the candidate value of the O corresponds to an integral multiple of the number of subframes contained in the half radio frame, and from 0 to ( _Nburst -1). ) * 5, At least a value included in the range of * 5, and the μ is given based on the setting of the subcarrier interval of the PBCH.

(2) The second aspect of the present invention is a terminal device, which is included in the nth SS / PBCH block of the SS burst set composed of Y SS / PBCH candidates included in the half radio frame. The SS burst set includes a receiving unit that receives the PBCH and an upper layer processing unit that sets a first monitoring opportunity of the first search area set based on at least the fields included in the PBCH. In the case of the SS burst set of, the upper layer processing unit sets the first monitoring opportunity based on the field included in the SS / PBCH block, and the SS burst set is the second SS burst set. In the case, the field does not indicate the setting of the first search region set, and the field indicates that the cell definition SS / PBCH block is at the same center frequency as the SS / PBCH block, and the cell definition The SS / PBCH block indicates the setting of the first monitoring opportunity.

(3) A third aspect of the present invention is the base station apparatus, in which the nth SS / PBCH block of the SS burst set composed of Y SS / PBCH candidates included in the half radio frame is used. A transmission unit that transmits the included PBCH and an upper layer processing unit that sets a first monitoring opportunity of the first search area set in the first slot based on at least the fields included in the PBCH. The initial value of the period of the SS burst set corresponds to N _burst times of the half radio frame, and the offset from the second slot, which is the first slot of the system frame of index j, to the first slot is O *. 2 ^ μ, the O is given at least based on the PBCH, the candidate value of the O corresponds to an integral multiple of the number of subframes contained in the half radio frame, and from 0 to ( _Nburst −). 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 interval of the PBCH.

(4) A fourth aspect of the present invention is the base station apparatus, in which the nth SS / PBCH block of the SS burst set composed of Y SS / PBCH candidates included in the half radio frame is used. The SS burst set includes a transmission unit that transmits the included PBCH and an upper layer processing unit that sets a first monitoring opportunity of the first search area set based on at least the fields included in the PBCH. When the SS burst set is 1, the upper layer processing unit sets the first monitoring opportunity based on the field included in the SS / PBCH block, and the SS burst set is the second SS burst set. If there is, the field does not indicate the setting of the first search region set, and the field indicates that the cell-defined SS / PBCH block is at the same center frequency as the SS / PBCH block, the cell. The definition SS / PBCH block indicates the setting of the first monitoring opportunity.

(5) A fifth aspect of the present invention is a communication method used for a terminal device, which is the nth SS among SS burst sets composed of Y SS / PBCH candidates included in a half radio frame. A step of receiving the PBCH contained in the / PBCH block and a step of setting a first monitoring opportunity of the first search area set in the first slot based on at least the fields included in the PBCH. The initial value of the cycle of the SS burst set corresponds to N _burst times of the half radio frame, and the offset from the second slot, which is the first slot of the system frame of index j, to the first slot is O *. 2 ^ μ, the O is given at least based on the PBCH, the candidate value of the O corresponds to an integral multiple of the number of subframes contained in the half radio frame, and from 0 to ( _Nburst −). 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 interval of the PBCH.

(6) A sixth aspect of the present invention is a communication method used for a terminal device, which is the nth SS among SS burst sets composed of Y SS / PBCH candidates included in a half radio frame. The SS burst set includes a step of receiving the PBCH included in the / PBCH block and a step of setting a first monitoring opportunity of the first search area set based on at least the field included in the PBCH. In the case of the SS burst set of 1, the upper layer processing unit sets the first monitoring opportunity based on the field included in the SS / PBCH block, and the SS burst set is the second SS burst set. If there is, the field does not indicate the setting of the first search region set, and the field indicates that the cell-defined SS / PBCH block is at the same center frequency as the SS / PBCH block, the cell. The definition SS / PBCH block indicates the setting of the first monitoring opportunity.

(7) A seventh aspect of the present invention is a communication method used in a base station apparatus, which is the nth SS burst set composed of Y SS / PBCH candidates included in a half radio frame. A step of transmitting the PBCH included in the SS / PBCH block and a step of setting a first monitoring opportunity of the first search area set in the first slot based on at least the field included in the PBCH are provided. The initial value of the cycle of the SS burst set corresponds to N _burst times of the half radio frame, and the offset from the second slot, which is the first slot of the system frame of index j, to the first slot is O. * 2 ^ μ, the O is given at least based on the PBCH, and the candidate value of the O corresponds to an integral multiple of the number of subframes included in the half radio frame, and is from 0 to ( _Nburst). -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 interval of the PBCH.

(8) An eighth aspect of the present invention is a communication method used in a base station apparatus, which is the nth SS burst set composed of Y SS / PBCH candidates included in a half radio frame. The SS burst set comprises a step of transmitting the PBCH included in the SS / PBCH block and a step of setting a first monitoring opportunity of the first search area set based on at least the fields included in the PBCH. When it is the first SS burst set, the upper layer processing unit sets the first monitoring opportunity based on the field included in the SS / PBCH block, and the SS burst set is the second SS burst set. If, the field does not indicate the setting of the first search region set, and the field indicates that the cell-defined SS / PBCH block is at the same center frequency as the SS / PBCH block. The cell-defined SS / PBCH block indicates the setting of the first monitoring opportunity.

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

It is a conceptual diagram of the wireless communication system which concerns on one aspect of this Embodiment. This is an example showing the relationship between the setting μ of the subcarrier interval, the number of OFDM symbols per ^slot N ^slot _symb , and the CP (cyclic Prefix) setting according to one aspect of the present embodiment. It is a figure which shows an example of the composition method of the resource grid which concerns on one aspect of this Embodiment. It is a figure which shows the configuration example of the resource grid 3001 which concerns on one aspect of this Embodiment. It is a schematic block diagram which shows the structural example of the base station apparatus 3 which concerns on one aspect of this Embodiment. It is a schematic block diagram which shows the structural example of the terminal apparatus 1 which concerns on one aspect of this Embodiment. It is a figure which shows the structural example of the SS / PBCH block which concerns on one aspect of this Embodiment. It is a figure which shows an example of the monitoring opportunity of the search area set which concerns on one aspect of this Embodiment. It is a figure which shows the example of the counting procedure which concerns on one aspect of this Embodiment. It is a figure which shows the structural example of the SS burst set which concerns on one aspect of this Embodiment. It is a figure which shows the structural example of the SS burst set which concerns on one aspect of this Embodiment. It is a figure which shows the example of the setting method of the monitoring opportunity of the type 0 PDCCH common search area set which concerns on one aspect of this embodiment. It is a figure which shows the example of the setting method of the monitoring opportunity of the type 0 PDCCH common search area set which concerns on one aspect of this embodiment. It is a figure which shows an example of the downlink communication which concerns on one aspect of this embodiment.

Hereinafter, embodiments of the present invention will be described.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Of the common resource block set 3100, the common resource block including the point 3000 (the block indicated by the upward slash in FIG. 3) is also referred to as the reference point of the common resource block set 3100. The reference point of the common resource block set 3100 may be the common resource block of index 0 in the common resource block set 3100.

The offset 3011 is an offset from the reference point of the common resource block set 3100 to the reference point of the resource grid 3001. The offset 3011 is indicated by the number of common resource blocks for the subcarrier spacing setting μ ₁ . The resource grid 3001 includes N ^{size, μ} grid 1 _{, x} common resource blocks starting from the reference point of the resource grid 3001.

The offset 3013 is an offset from the reference point of the resource grid 3001 to the reference point (N ^{start, μ} _{BWP, i1} ) of the BWP (BandWidth Part) 3003 of the index i1.

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

Of the common resource block set 3200, the common resource block including the point 3000 (the block indicated by the upward slash in FIG. 3) is also referred to as the reference point of the common resource block set 3200. The reference point of the common resource block set 3200 may be the common resource block of index 0 in the common resource block set 3200.

The offset 3012 is an offset from the reference point of the common resource block set 3200 to the reference point of the resource grid 3002. Offset 3012 is indicated by the number of common resource blocks for the subcarrier spacing μ ₂ . The resource grid 3002 includes N ^{size, μ} _{grid 2, x} common resource blocks starting from the reference point of the resource grid 3002.

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

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

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

A resource block unit is a set of resources corresponding to one OFDM symbol in one resource block. That is, one resource block unit contains 12 resource elements corresponding to 1 OFDM symbol in one resource block.

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

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

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

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

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

Carrier aggregation may be communication using a plurality of aggregated serving cells. Further, carrier aggregation may be to perform communication using a plurality of aggregated component carriers. Further, carrier aggregation may be to perform communication using a plurality of aggregated downlink component carriers. Further, carrier aggregation may be to perform communication using a plurality of aggregated uplink component carriers.

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

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

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

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

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

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

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

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

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

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

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

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

Each of the serving cells set for the terminal device 1 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). The PCell is a cell (implemented cell) that executes an initial connection establishment procedure (initial connection establishment procedure) or a connection re-establishment procedure (connection re-establishment procedure) by the terminal device 1.

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

SCell may be included in either MCG or SCG.

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

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

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

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

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

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

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

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

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

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

The wireless transmission / reception unit 10 includes at least a part or all of the wireless transmission unit 10a and the wireless reception unit 10b. Here, the device configurations of the baseband unit 13 included in the wireless transmission unit 10a and the baseband unit 13 included in the wireless reception unit 10b may be the same or different. Further, the device configurations of the RF unit 12 included in the wireless transmission unit 10a and the RF unit 12 included in the wireless reception unit 10b may be the same or different. Further, the device configurations of the antenna unit 11 included in the wireless transmission unit 10a and the antenna unit 11 included in the wireless reception unit 10b may be the same or different.

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

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

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

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

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

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

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

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

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

The physical signal (signal) will be described below.

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

The uplink physical channel may correspond to a set of resource elements that carry information that occurs in the upper layers. The uplink physical channel may be the physical channel used in the uplink component carrier. The uplink physical channel may be transmitted by the terminal device 1. The uplink physical channel may be received by the base station apparatus 3. In the wireless communication system according to one 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: Uplink Control Information). The PUCCH may be transmitted to transmit uplink control information (deliver, transmission, convey). The uplink control information may be mapped on the PUCCH. The terminal device 1 may transmit the PUCCH in which the uplink control information is arranged. The base station apparatus 3 may receive the PUCCH in which the uplink control information is arranged.

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

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

HARQ-ACK information is the transport block (or TB: Transport block, MAC PDU: Medium Access Control Protocol Data Unit, DL-SCH: Downlink-Shared Channel, UL-SCH: Uplink-Shared Channel, PDSCH: Physical Downlink Shared. It may contain at least HARQ-ACK corresponding to Channel, PUSCH: Physical Uplink Shared CHannel). HARQ-ACK may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to the transport block. ACK may indicate that the decryption of the transport block has been successfully completed (has been decoded). NACK may indicate that the decryption of the transport block has not been successfully completed (has not been decoded). The HARQ-ACK information may include a HARQ-ACK codebook containing one or more HARQ-ACK bits.

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

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

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

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

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

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

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

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

For a PRACH opportunity, 64 random access preambles are defined. Random access preamble cyclic shift _{C v} of PRACH sequence, and, at least on the basis of the identified sequence index u for PRACH sequence (determined, given).

The uplink physical signal may correspond to a set of resource elements. The uplink physical signal does not have to carry the information generated in the upper layer. The uplink physical signal may be the physical signal used in the uplink component carrier. The terminal device 1 may transmit an uplink physical signal. The base station device 3 may receive an uplink physical signal. In the wireless communication system according to one 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 general term for DMRS for PUSCH and DMRS for PUCCH.

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

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

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

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

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

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

The downlink physical channel may correspond to a set of resource elements that carry information that occurs in the upper layers. The downlink physical channel may be the physical channel used in the downlink component carrier. The base station apparatus 3 may transmit a downlink physical channel. The terminal device 1 may receive the downlink physical channel. In the wireless communication system according to one 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)

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

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

The radio frame bit is used to indicate a radio frame through which the PBCH is transmitted (a radio frame including a slot through which the PBCH is transmitted). The radio frame bit includes 4 bits. The radio frame bit may be composed of 4 bits of the 10-bit radio frame indicator. For example, the radio frame indicator may 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 latter five subframes among the radio frames in which the PBCH is transmitted. Here, the half radio frame may be configured to include five subframes. Further, the half radio frame may be composed of five subframes in the first half of the ten subframes included in the radio frame. Further, the half radio frame may be composed of the latter five subframes out of the ten subframes included in the radio frame.

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

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

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

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

DCI format 0_1, DCI format 0_1, DCI format 1_1, and DCI format 1_1 are DCI formats including different sets of fields. The uplink DCI format is a general term for DCI format 0_0 and DCI format 0_1. The downlink DCI format is a general term for DCI format 1_0 and DCI format 1-1.1.

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

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

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

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

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

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

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

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

DCI format 0_1 is at least used for scheduling PUSCH (located in a cell) in a cell. DCI format 0-1 is configured to include at least some or all of the fields 2A to 2H.
2A) DCI format specific field 2B) Frequency domain resource allocation field 2C) Uplink time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS field 2F) CSI request field
2G) BWP field
2H) Carrier indicator field

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

The frequency domain resource allocation field included in DCI format 0-1 may at least be used to indicate the allocation of frequency resources for PUSCH.

The time domain resource allocation field contained in DCI format 0-1 may at least be used to indicate the allocation of time resources for PUSCH.

The MCS field contained in DCI format 0-1 may be at least used to indicate the modulation scheme for PUSCH and / or part or all of the target code rate.

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

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

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

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

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

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

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

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

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

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

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

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

DCI format 1-11 is at least used for scheduling PDSCH in a cell (or placed in a cell). DCI format 1_1 is configured to include at least some or all of 4A to 4I.
4A) DCI format specific field 4B) Frequency domain resource allocation field 4C) Time domain resource allocation field 4E) MCS field 4F) PDSCH_HARQ feedback timing indication field 4G) PUCCH resource allocation field 4H) BWP field 4I) Carrier indicator field

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

The frequency domain resource allocation fields included in DCI format 1-11 may at least be used to indicate the allocation of frequency resources for PDSCH.

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

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

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

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

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

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

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

The downlink physical signal may correspond to a set of resource elements. The downlink physical signal does not have to carry the information generated in the upper layer. The downlink physical signal may be a physical signal used in the downlink component carrier. The downlink physical signal may be transmitted by the base station apparatus 3. The downlink physical signal may be transmitted by the terminal device 1. In the wireless communication system according to one aspect of the present embodiment, at least 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 at least used by the terminal device 1 to synchronize the downlink frequency domain and / or the time domain. The synchronization signal is a general term for PSS (PrimarySynchronizationSignal) and SSS (SecondarySynchronizationSignal).

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

As shown in FIG. 7, the SS / PBCH block includes PSS, SSS, and PBCH. Also, the SS / PBCH block contains four consecutive OFDM symbols. The SS / PBCH block contains 240 subcarriers. The PSS is located in the 57th to 183rd subcarriers of the 1st OFDM symbol. The SSS is located in the 57th to 183rd subcarriers of the 3rd OFDM symbol. The 1st to 56th subcarriers of the 1st OFDM symbol may be set to zero. The 184th to 240th subcarriers of the first OFDM symbol may be set to zero. The 49th to 56th subcarriers of the 3rd OFDM symbol may be set to zero. The 184th to 192nd subcarriers of the third OFDM symbol may be set to zero. The PBCH is placed in the 1st to 240th subcarriers of the second OFDM symbol and in which the DMRS for the PBCH is not placed. The PBCH is placed in the 1st to 48th subcarriers of the 3rd OFDM symbol and in which the DMRS for the PBCH is not placed. The PBCH is placed in the 193rd to 240th subcarriers of the third OFDM symbol and in which the DMRS for the PBCH is not placed. The PBCH is placed in the 1st to 240th subcarriers of the 4th OFDM symbol and in which the DMRS for the PBCH is not placed.

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

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

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

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

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

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

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

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

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

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

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

The RRC message contains one or more RRC parameters (information elements). For example, the RRC message may include a MIB. The RRC message may also include system information. In addition, the RRC message may include a message corresponding to CCCH. Further, the RRC message may include a message corresponding to DCCH.

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

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

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

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

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

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

In a half radio frame, the placement of the leading OFDM symbol index of the SS / PBCH block candidate is given at least based on the SS / PBCH block index. For example, when the subcarrier spacing of the SS / PBCH block is 30 kHz (when the subcarrier spacing setting μ = 1 for the SS / PBCH block), the index {0,1,2,3,4,5,6 The OFDM symbol index l ^hrf _{sym at} the head of the SS / PBCH block candidate (SS / PBCH candidate) of 7} may be {2,8,16,22,30,36,44,50}, respectively. The OFDM symbol index l ^hrf _sym may be given in ascending order by an integer value in the range of 0 to N ^{frame, μ} _slot * N ^slot _symb / 2-1 in a half radio frame.

SS / PBCH block candidates indicate resources for which transmission of SS / PBCH blocks is permitted (possible, reserved, set, specified, possible).

A set of SS / PBCH block candidates in a half radio frame is also called an SS burst set. The SS burst set is also referred to as a transmission window (transmission window), an SS transmission window (SS transmission window), or a DRS transmission window (Discovery Reference Signal transmission window).

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

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

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

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

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

The PUSCH scheduled based on the random access response grant is either Message 3 PUSCH or PUSCH. Message 3 PUSCH includes a collision resolution identifier (contention resolution identifier) MAC CE. Conflict resolution ID MAC CE includes a conflict resolution ID.

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

Message 4 is a procedure for attempting to detect DCI format 0_0 with CRC scrambled based on either C-RNTI (Cell-Radio Network Temporary Identifier) or TC-RNTI. The terminal device 1 receives the PDSCH scheduled based on the DCI format 0_0. The PDSCH may include a conflict resolution ID.

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

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

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

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

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

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

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

The CSS set is a general term for a type 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. The USS set is also referred to as a UE individual PDCCH search area set.

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

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

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

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

In FIG. 8, the blocks indicated by the grid lines indicate the search area set 91, the blocks indicated by the upward-sloping diagonal line indicate the search area set 92, and the blocks indicated by the upward-sloping diagonal line indicate the search area set 93, which are indicated by horizontal lines. The blocks shown show the search area set 94.

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

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

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

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

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

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

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

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

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

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

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

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

The base station device 3 and the terminal device 1 may carry out a channel access procedure in the serving cell c and transmit a transmission wave (Transmission) in the serving cell c. For example, the serving cell c may be a serving cell set in an unlicensed band. The transmitted wave is a signal transmitted from the base station device 3 or the terminal device 1 to the medium.

The base station device 3 and the terminal device 1 may carry out the channel access procedure on the carrier f of the serving cell c and transmit the transmitted wave on the carrier f of the serving cell c. The carrier f is a carrier included in the serving cell c. The carrier f may be composed of a set of resource blocks given based on the parameters of the upper layer.

The base station device 3 and the terminal device 1 may carry out the channel access procedure in the carrier f of the serving cell c and transmit the transmitted wave in the band part b of the carrier f of the serving cell c. The band part b is a subset of the bands contained in the carrier f.

The base station device 3 and the terminal device 1 may carry out the channel access procedure in the band part b of the carrier f of the serving cell c and transmit the transmitted wave in the carrier f of the serving cell c. Carrying out the transmission of the transmitted wave in the carrier f of the serving cell c may mean that the transmitted wave is transmitted in any of the band parts included in the carrier f of the serving cell c.

The base station device 3 and the terminal device 1 may carry out the channel access procedure in the band part b of the carrier f of the serving cell c and transmit the transmitted wave in the band part b of the carrier f of the serving cell c.

The channel access procedure may be configured to include at least one or both of the first sensing and counting procedures. The first channel access procedure may include a first measurement. The first channel access procedure may not include a counting procedure. The second channel access procedure may include at least both the first measurement and counting procedure. The channel access procedure is a name including a part or all of the first channel access procedure and the second channel access procedure.

After the first channel access procedure is performed, a transmitted wave containing at least the SS / PBCH block may be transmitted. 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 to schedule 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 transmitted wave containing at least a PDSCH containing information other than broadcast information may be transmitted. The PDSCH containing the broadcast information may include at least a part or all of the PDSCH containing the system information, the PDSCH containing the paging information, and the PDSCH (message 2 and / or message 4) used for random access.

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

When the period of the DRS is less than or equal to the predetermined length and the duty ratio (duty cycle) of the DRS is less than or equal to the predetermined value, the transmission wave including the DRS is transmitted after the first channel access procedure is performed. You may. If the period of the DRS exceeds the predetermined length, a transmitted wave containing the DRS may be transmitted after the second channel access procedure is performed. When the duty ratio of the DRS exceeds the predetermined value, a transmission wave containing the DRS may be transmitted after the second channel access procedure is performed. For example, the predetermined length may be 1 ms. Moreover, the predetermined value may be 1/20.

Transmission of the transmitted wave after the channel access procedure is performed may mean that the transmitted wave is transmitted based on the channel access procedure. The transmission of the transmit wave after the channel access procedure has been performed may mean that the transmit wave is transmitted given that the channel is transmissible under the channel access procedure.

The first measurement is even if it is detected that the medium is idle in one or more LBT slot durations of the defer durations. Good. Here, LBT (Listen Before Talk) may be a procedure in which whether the medium is idle or busy (Busy) is given based on the carrier sense. Carrier sense may be to perform Energy detection in the medium. For example, busy may be in a state where the amount of energy detected by carrier sense is greater than a predetermined threshold. Further, the idle may be in a state where the amount of energy detected by the carrier sense is smaller than a predetermined threshold value. Also, the fact that the amount of energy detected by carrier sense is equal to a predetermined threshold value may be idle. Also, it may be busy that the amount of energy detected by carrier sense is equal to a predetermined threshold.

Being an idol may mean not being busy. Being busy may mean not being an idol.

The LBT slot period is a unit of LBT. For each LBT slot period, it may be given whether the medium is idle or busy. For example, the LBT slot period may be 9 microseconds.

The deferral period may include at least a period T _f and one or more LBT slot periods. The length of the postponement period is called T _d . For example, the period T _f may be 16 microseconds.

FIG. 9 is a diagram showing an example of a counting procedure according to one aspect of the present embodiment. The counting procedure includes at least a part or all of steps A1 to A6. Step A1 includes an operation of setting the value of the counter N to N _init . Here, N _init is a value that is randomly (or pseudo-randomly) selected from integer values included in the range of 0 to CWp. CWp is the contention window size (CWS) for the channel access priority class p.

In step A2 (Step A2), it is determined whether or not the value of the counter N is 0. Step A2 includes an operation of completing (or ending) the channel access procedure when the counter N is 0. Step A2 includes an operation of proceeding to step A3 when the counter N is different from 0. 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. Further, False corresponds to the fact that the evaluation formula is false in the step including the operation of determining the evaluation formula. In step A2, the evaluation formula corresponds to counter N = 0.

For example, step A3 (Step A3) may include a step of decrementing the value of the counter N. Decrementing the value of counter N may be to decrement the value of counter N by one. That is, decrementing the value of counter N may mean setting the value of counter N to N-1.

For example, step A3 may include a step of decrementing the value of the counter N when N> 0. Further, 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 chooses to decrement the counter N. Further, step A3 may 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 an operation of performing carrier sense of the medium in the LBT slot period d and proceeding to step A2 when the LBT slot period d is idle. Further, step A4 may include an operation of proceeding to step A2 when the LBT slot period d is determined to be idle by the carrier sense. Further, step A4 may include an operation of performing carrier sense in the LBT slot period d and proceeding to step A5 when the LBT slot period d is busy. Further, step A4 may include an operation of proceeding to step A5 when the LBT slot period d is determined to be busy by the carrier sense. Here, the LBT slot period d may be the LBT slot period, which may be the LBT slot period next to the LBT slot period already carrier-sensed in the counting procedure. In step A4, the evaluation formula may correspond to the LBT slot period d being idle.

In Step A5, the medium may be idle until it is detected that the medium is busy during a certain LBT slot period included in the deferral period, or during all LBT slot periods included in the deferral period. Includes the action of performing carrier sense until detected.

Step A6 (Step A6) includes an operation of proceeding to step A5 when the medium is detected to be busy during a certain LBT slot period included in the postponement period. Step A6 includes an operation of proceeding to step A2 when it is detected that the medium is idle during all the LBT slot periods included in the postponement period. In step A6, the evaluation formula may correspond to the medium being idle during the certain LBT slot period.

CW _{min and p} indicate the minimum value in the range of possible values of the contention window size CWp for the channel access priority class p. CW _{max and p} indicate the maximum value in the range of possible values of the contention window size CWp with respect to the channel access priority class p. The contention window size CWp for the channel access priority class p is also referred to as CWp.

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

In a certain component carrier, NR-U (New Radio --Unlicensed) may be applied. In some serving cells, NR-U may be applied. The application of NR-U in a component carrier (or a serving cell) may include at least a technique (framework, configuration) that includes some or all of the following elements A1 to A6.
Element A1: The second SS burst set is configured in the component carrier (or the serving cell) Element A2: The base station apparatus 3 is the second in the component carrier (or the serving cell). Element A3 for transmitting the SS / PBCH block: The terminal device 1 receives the second SS / PBCH block in the component carrier (or the serving cell). Element A4: The base station device 3 is the same. In the second type 0PDCCH common search area set in the component carrier (or the serving cell), the element A5 that transmits the PDCCH: the terminal device 1 is the second type 0PDCCH in the component carrier (or the serving cell). In the common search region set, the upper layer parameter (for example, the field included in the MIB) related to the element A6: NR-U that receives the PDCCH indicates the first value (for example, 1).

NR-U (New Radio --Unlicensed) may not be applied in a certain component carrier. In some serving cells, NR-U may not be applied. The absence of NR-U in a component carrier (or serving cell) may include at least a technique (framework, configuration) that includes some or all of the following elements B1 through B6.
Element B1: In the component carrier (or the serving cell), the first SS burst set is configured Element B2: The base station apparatus 3 is the first in the component carrier (or the serving cell). Element B3 for transmitting the SS / PBCH block: The terminal device 1 receives the first SS / PBCH block in the component carrier (or the serving cell). Element B4: The base station device 3 is the same. In the first type 0PDCCH common search area set in the component carrier (or the serving cell), the element B5 that transmits the PDCCH: the terminal device 1 is the first type 0PDCCH in the component carrier (or the serving cell). In the common search area set, the upper layer parameter (for example, the field included in the MIB) related to the element B6: NR-U that receives the PDCCH shows a value different from the first value (for example, 0).

A component carrier may be set to a licensed band. Some serving cells may be set in the licensed band. Here, setting a certain component carrier (or a certain serving cell) to the license band may include at least a part or all of the following settings 1 to 3.
Setting 1: An upper layer parameter is given to indicate that a component carrier (or a serving cell) operates in a licensed band, or an unlicensed band is given to a component carrier (or a serving cell). ) Is not given. Setting 2: A component carrier (or a serving cell) is set to operate in the licensed band, or it operates in the unlicensed band. A component carrier (or a serving cell) is not set Setting 3: A component carrier (or a serving cell) is included in the licensed band, or a component carrier (or a serving cell) is not included in the unlicensed band

The license band may be a band in which a radio station license is required for a terminal device that operates (expected) in the license band. The licensed band may be a band in which only terminal devices manufactured by a business operator (business entity, business, group, company) holding a radio station license are permitted to operate. The unlicensed band may be a band that does not require a channel access procedure prior to transmitting a physical signal.

The license-free band may be a band in which a radio station license is not required for a terminal device that operates (expected) in the license-free band. The unlicensed band is a band in which a terminal device manufactured by a business operator holding a radio station license and / or a part or all of a business operator not holding a radio station license is permitted to operate. Good. The unlicensed band may be a band that requires a channel access procedure prior to transmitting a physical signal.

Whether or not NR-U is applied to a certain component carrier (or a certain serving cell) is determined by at least a band in which the certain component carrier (or the certain serving cell) can operate in an unlicensed band (for example, an unlicensed band). It may be decided based on whether or not it is set to a band that can be operated only by. For example, a list of bands designed for NR or carrier aggregation of NR may be specified. For example, if one or more bands in the list are included in a band that can be operated in the unlicensed band (for example, a band that can be operated only in the unlicensed band), the NR-U is included in the band. May be applied. Further, if one or more bands in the list are not included in the band that can be operated in the unlicensed band (for example, the band that can be operated only in the unlicensed band), the NR-U is included in the band. Is not applied, and normal NR (for example, NR of release 15 or NR other than NR-U of release 16) may be applied.

Whether or not NR-U is applied to a component carrier (or a serving cell) is determined only in a band in which the component carrier (or the serving cell) can operate NR-U (for example, NR-U). It may be determined based on whether or not it is set to an operable band). For example, a list of bands for which NR or NR carrier aggregation is designed for its operation is specified, and one or more bands in the list can operate only NR-U (for example, only NR-U can operate). When specified as (possible band), NR-U is applied if the band set for the component carrier (or its serving cell) is either one or more of the bands. If it is a band other than one or more bands, NR-U is not applied, and a normal NR (for example, NR of release 15 or NR other than NR-U of release 16) may be applied.

Whether or not NR-U is applied to a certain component carrier (or a certain serving cell) is determined based on the information contained in the system information (for example, Master Information Block (MIB or Physical Broadcast Channel (PBCH))). May be done. For example, if the MIB contains information indicating whether or not to apply NR-U, and that information indicates that NR-U is applied, then 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 to the serving cell to which the MIB corresponds, and normal NR may be applied. Alternatively, it may indicate whether or not the information can be operated in a license-free band.

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

Below, the explanation will be given on the assumption that the component carrier will be set to the licensed band or the unlicensed band. Note that "the component carrier is set to the licensed band" may mean "the serving cell is set to the licensed band", and "the component carrier is set to the unlicensed band" means " The serving cell may be set to the 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, it may be given at least on a part or all of whether or not the component carrier is set in the unlicensed band.

For example, when a certain component carrier is set in the license band, the terminal device 1 may receive the first SS / PBCH block. Further, when a certain component carrier is set to the license band, the terminal device 1 may receive the first PDCCH in the first type 0 PDCCH common search area set. Further, when a certain component carrier is set to the license band, the base station apparatus 3 may transmit the first SS / PBCH block. Further, when a certain component carrier is set to the license band, the base station apparatus 3 may receive the first PDCCH in the first type 0 PDCCH common search area set.

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

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

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

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

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

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

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

For example, when the subcarrier interval of the second SS / PBCH block is 30 kHz (when the setting μ of the subcarrier interval for the second SS / PBCH block is μ = 1), the SS / PBCH included in a certain half radio frame The number of block candidates may be 20. Further, when the subcarrier interval of the second SS / PBCH block is 30 kHz, the index {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14 , 15, 16, 17, 18, 19} The first OFDM symbol index l ^hrf _sym of the second SS / PBCH block candidate is {2,8,16,22,30,36,44,50, respectively. It may be 58, 64, 72, 78, 86, 92, 100, 106, 114, 120, 128, 134}. Further, when the subcarrier interval of the second SS / PBCH block is 30 kHz, even if the OFDM symbol index l ^hrf _{sym at} the head of the second SS / PBCH block candidate of the index 2n (even index) is 2 + 14n. Good. Further, when the subcarrier interval of the second SS / PBCH block is 30 kHz, even if the OFDM symbol index l ^hrf _{sym at} the head of the second SS / PBCH block candidate of the index 2n + 1 (radix index) is 8 + 14n. Good.

For example, when the subcarrier spacing of the second SS / PBCH block is 30 kHz, the index {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14 , 15, 16, 17, 18, 19}, the first OFDM symbol index l ^hrf _sym of the second SS / PBCH block candidate is {2, 9, 16, 23, 30, 37, 44, 51, respectively. It may be 58, 65, 72, 79, 86, 93, 100, 107, 114, 121, 128, 135}. Further, when the subcarrier interval of the second SS / PBCH block is 30 kHz, even if the OFDM symbol index l ^hrf _{sym at} the head of the second SS / PBCH block candidate of the index 2n + 1 (radix index) is 9 + 14n. Good.

FIG. 10 is a diagram showing a configuration example of an SS burst set according to one aspect of the present embodiment. In FIG. 10, the horizontal axis is the index of the half radio frame, and the square block represents the SS burst set. 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, it may be a value corresponding to an integral multiple of other 5 ms.

The interval of the SS burst set may be set by the upper layer parameter, but when the terminal device 1 is not given the upper layer parameter (for example, a cell search procedure or the like), the SS assumed by the terminal device 1 It is desirable to give an initial value for the burst set interval. The initial value of the interval of the first SS burst set including the first SS / PBCH block is 20 ms. The initial value of the interval of the second SS burst set including the second SS / PBCH block may be 20 ms, 40 ms, or a value corresponding to an integral multiple of the other 5 ms. You may.

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

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

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

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

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

It is preferable that the type 0PDCCH common search area set is set in the vicinity of the slot where the SS / PBCH block is transmitted in the unlicensed band. This simplifies the channel access procedure by transmitting the SS / PBCH block, the PDSCH used for transmitting broadcast information such as system information, and the PDCCH used for scheduling the PDSCH collectively in the time domain. This is to realize it. That is, for example, it is preferable to preferably arrange the type 0PDCCH common search area set for the arrangement of each SS burst set of the pattern A, the pattern B, the pattern C, and the pattern D.

For example, when the terminal device 1 receives the second SS / PBCH block in the second SS / PBCH block candidate of the index X arranged in a certain slot, the second SS / PBCH block of the index X It may be notified that the monitoring opportunity of the type 0PDCCH common search area set corresponding to the candidate is placed in the slot moved from the slot by an integral multiple of the half radio frame.

FIG. 12 is a diagram showing an example of a method for setting a monitoring opportunity of the type 0PDCCH common search area set according to one aspect of the present embodiment. In FIG. 12, the horizontal axis is the index of the half radio frame, the square block indicates the SS burst set, and the shaded block indicates the type 0PDCCH common search area set corresponding to a certain SS / PBCH block candidate. As shown in FIG. 12, when the second SS / PBCH block candidate of the index X included in the half radio frame of the index n receives the second SS / PBCH block, it corresponds to the second SS / PBCH block candidate. The second type 0PDCCH common search region set is preferably located at least at index n, index n + 1, index n + 2, or index n + 3. Whether the second type 0PDCCH common search region set is located at index n, index n + 1, index n + 2, or index n + 3 may be given at least based on upper layer parameters. Whether the second type 0PDCCH common search region set is located at index n, index n + 1, index n + 2, or index n + 3 may be given at least based on PBCH (or MIB).

FIG. 13 is a diagram showing an example of a method for setting a monitoring opportunity of the type 0PDCCH common search area set according to one aspect of the present embodiment. In FIG. 13, the horizontal axis is the index of the half radio frame, the square block indicates the SS burst set, and the shaded block indicates the type 0PDCCH common search area set corresponding to a certain SS / PBCH block candidate. As shown in FIG. 13, when the second SS / PBCH block candidate of the index X included in the half radio frame of the index n + 1 receives the second SS / PBCH block, it corresponds to the second SS / PBCH block candidate. The second type 0PDCCH common search region set is preferably located at least at index n + 1, index n + 2, index n + 3, or index n + 4. Whether the second type 0PDCCH common search region set is located at index n + 1, index n + 2, index n + 3, or index n + 4 may be given at least based on upper layer parameters. Whether the second type 0PDCCH common search region set is located at index n + 1, index n + 2, index n + 3, or index n + 4 may be given at least based on PBCH (or MIB).

Here, when the initial value of the interval of the second SS burst set is N _burst * 5 ms and the SS / PBCH block is received in the slot having the half radio frame in which the terminal device 1 is located, the type 0 PDCCH common search area set The slot in which the monitoring opportunity is arranged may be a slot that has moved from the certain slot by a time corresponding to an _Obrust times of a half radio frame. Here, _Oburst may be any of 0 to _Nburst -1. Also, the _Oburst may be given at least based on the upper layer parameters. _{Also, O burst} is, PBCH (or, MIB) may be provided at least on the basis of. Candidate value of O _burst may include only an integer value ranging from 0 to _{N burst} -1. Candidate value of O _burst may contain everything from 0 integer value ranging from _{N burst} -1. The _Oburst candidate value is a set of _Oburst values that can be notified based on the upper layer parameters. For example, _Oburst may be indicated at least based on certain upper layer parameters contained in the MIB.

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

The slot indexes n ^μ _{s and f} of the slot in which the type 0 PDCCH common search area set corresponding to the SS / PBCH block candidate of the index X is arranged are n ^μ _{s, f} = mod (O * 2 ^ μ + floor (X * M)). , N ^{frame, μ} _slot ) may be satisfied. Here, part or all of O and / or M may be indicated at least based on upper layer parameters. Also, part or all of O and / or M may be indicated at least based on PBCH (or MIB). For example, O may be indicated at least based on certain upper 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 for moving the slot in which the type 0PDCCH common search area set is arranged by the number of slots corresponding to an integral 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 a type 0PDCCH common search area set corresponding to the second SS / PBCH block candidate of index X from the slot in which the type 0PDCCH common search area set corresponding to the second SS / PBCH block candidate of index 0 is arranged. May be at least a parameter used to indicate the offset to the slot in which.

Μ may be the setting μ of the subcarrier interval for the SS / PBCH block.

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

For the first SS / PBCH block candidate, the candidate value of O may include at least a part or all of 0, 2, 5, and 7. For the first SS / PBCH block candidate, the candidate value of M may include at least a part or all of 1/2, 1, and 2.

When the index X is an even number, the monitoring opportunity of the type 0PDCCH common search area set corresponding to the first SS / PBCH block candidate of the index X is arranged for the first SS / PBCH block candidate of the index X. The first OFDM symbol index l _sym of the OFDM symbols may be 0. When the index X is odd, the first SS / PBCH block candidate of the index X has a monitoring opportunity of the type 0PDCCH common search area set corresponding to the first SS / PBCH block candidate of the 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 at index 0.

For the second SS / PBCH block candidate, the candidate value of O may include at least a part or all of 0, 5, 10, 15, 20, 25, 30, and 35. For the second SS / PBCH block candidate, the candidate value of O may include a value corresponding to an integral multiple of the number of subframes included in the half radio frame. When the initial value of the interval of the second SS burst set is N _burst * 5 ms, the candidate value of O corresponds to an integral multiple of the number of subframes included in the half radio frame, and is from 0 to (N _burst). -1) A value included in the range of * 5 may be included. Each of the candidate values of O corresponds to an integral multiple of the number of subframes included in the half radio frame, and may be included in the range from 0 to ( _Nburst -1) * 5.

For example, when the initial value of the interval of the second SS burst set is 20 ms (N _burst = 4), the candidate values of O are at least 10 and 15 for the second SS / PBCH block candidate. It may be included. Further, when the initial value of the interval of the second SS burst set is 20 ms (N _burst = 4), the candidate values of O are 0, 5, 10, and for the second SS / PBCH block candidate. , 15 may include at least some or all of them. For example, the terminal device 1 may determine O based on the MIB and set the type 0PDCCH common search area set, assuming that the initial value of the interval of the second SS burst set is 20 ms.

For example, when the initial value of the interval of the second SS burst set is 40 ms (N _burst = 8), the candidate values of O are 10, 15, 20, 25 with respect to the second SS / PBCH block candidate. , 30, and 35 may be included at least. Further, when 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 with respect to the second SS / PBCH block candidate. , 20, 25, 30, and 35 may include at least some or all of them. For example, the terminal device 1 may determine O based on the MIB and set the type 0PDCCH common search area set, assuming that the initial value of the interval of the second SS burst set is 20 ms.

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

When the index X is an even number, the monitoring opportunity of the type 0PDCCH common search area set corresponding to the second SS / PBCH block candidate of the index X is arranged for the second SS / PBCH block candidate of the index X. The candidate value of the first OFDM symbol index l _sym among the OFDM symbols may include at least a part or all of 0 and 1. Further, when the index X is an odd number, the second SS / PBCH block candidate of the index X has a monitoring opportunity of the type 0PDCCH common search area set corresponding to the second SS / PBCH block candidate of the index X. The candidate value of the leading OFDM symbol index l _sym among the arranged OFDM symbols may include at least a part or all of 6 and 7.

One half radio frame may contain Y SS / PBCH block candidates. Y SS / PBCH block candidates may form one SS burst set. The initial value of the SS burst set interval may be a predetermined value (for example, 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 the index X in the SS burst set. Here, the slot in which the SS / PBCH block candidate of the index X is arranged is referred to as 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 set a monitoring opportunity of the type 0PDCCH common search area set corresponding to the SS / PBCH block candidate of 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 0PDCCH common search area set is set is referred to as 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 integral multiple of the number of subframes included in the half radio frame, and starts from 0. At least the values included in the range of (N _burst -1) * 5 may be included. For example, when the initial value of the interval of the SS burst set is 20 ms (N _burst = 4), the candidate value of O may include at least 10 and 15 with respect to the SS / PBCH block candidate. When the initial value of the interval of the SS burst set is 20 ms (N _burst = 4), the candidate value of O is one of 0, 5, 10, and 15 for the SS / PBCH block candidate. It may include at least a part or all.

Further, when the initial value of the interval of the SS burst set is 40 ms (N _burst = 8), the candidate values of O are 10, 15, 20, 25, 30, and 10 for the SS / PBCH block candidate. , 35 may be included at least. Further, when 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 include at least some or all of them.

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

Here, the half radio frame including the SS slot is referred to as an SS half radio frame. Further, the half radio frame including the monitoring opportunity slot is referred to as a monitoring opportunity half radio frame. The difference from the SS half radio frame to the monitoring opportunity half radio frame may be any of 0 to _Nburst- 1 half radio frames.

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

The SS burst set 1101 may be an SS burst set that is arranged aperiodically. For example, the transmission of SS / PBCH blocks in one or more SS / PBCH block candidates included in SS burst set 1101 may be given at least based on the DCI format and / or upper layer parameters. For example, the DCI format may indicate downlink assignment. The DCI format may also be included in PDCCH1106. The PDCCH 1106 may be a GC-PDCCH (Group Common-Physical Downlink Control CHannel).

In the SS / PBCH block candidate included in the SS burst set 1101, whether or not the SS / PBCH block can be transmitted may be given based on the second channel access procedure.

The SS burst set 1101 is also referred to as a cell undefined SS burst set. The cell undefined SS burst set may be an SS burst set that does not include the type 0PDCCH common search area set 1104.

The SS burst set 1102 and the SS burst set 1103 may be SS burst sets that are periodically arranged.

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

In the SS / PBCH block candidate included in either the SS burst set 1102 or the SS burst set 1103, whether or not the SS / PBCH block can be transmitted may be given based on the first channel access procedure.

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

When the initial value of the interval of the SS burst set is 20 ms, the candidate values of O may include at least 5, 10, and 15 with respect to the SS / PBCH block candidates included in the cell-defined SS burst set. When the initial value of the interval of the SS burst set is 40 ms, the candidate values of O are 5, 10, 15, 20, 25, 30, and 5, 10 and 15, 20, 25, 30 and 5, with respect to the SS / PBCH block candidates included in the cell-defined SS burst set. , 35 may be included at least. When the initial value of the SS burst set interval is N _burst * 5 ms, the candidate value of O corresponds to an integral multiple of the half radio frame for the SS / PBCH block candidates included in the cell-defined SS burst set. _Moreover , at least the value included in the range from 0 to (N _burst -1) * 5 may be included.

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

The PBCH and / or MIB included in the SS / PBCH block in the SS / PBCH block candidate included in the SS burst set 1101 may indicate that the type 0PDCCH common search area set 1104 is not arranged in the SS burst set 1101. .. For example, it may be indicated that the type 0PDCCH common search area set 1104 is not arranged in the SS burst set 1101 by setting a predetermined upper layer parameter included in the MIB to a predetermined value.

For example, the predetermined upper layer parameter may be at least the upper layer parameter used to indicate the control resource set of index 0. Further, the predetermined upper layer parameter may be an upper layer parameter at least used to indicate the type 0PDCCH common search region set 1104.

For the predetermined upper layer parameter, the monitoring opportunity of the search area set is not set in the SS burst set 1101, and the cell defining SS / PBCH block is arranged at the same center frequency as the SS burst set. It may be shown that.

The cell-defined SS / PBCH block may be an SS / PBCH block containing a MIB including an upper layer parameter indicating the setting of the type 0PDCCH common search area set. The cell-defined SS / PBCH block may be an SS / PBCH block containing a MIB containing an upper layer parameter indicating the setting of a type 0 PDCCH common search area set for PDCCH scheduling a PDSCH containing SIB1. The setting of the type 0PDCCH common search area set may be a setting including at least O and M related to the type 0PDCCH common search area set.

The upper layer parameter indicating the setting of the control resource set of index 0 and the upper layer parameter indicating the setting of the type 0 PDCCH common search area set are collectively referred to as the upper layer parameter pdcch-configSIB1. When the subcarrier offset indicated by the PBCH shows a predetermined value, the upper layer parameter pdcch-configSIB1 may be used to notify the GSCN (global synchronization channel number). 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 shows a predetermined value, the upper layer parameter pdcch-configSIB1 may show GSCN = 0. Good. GSCN = 0 may indicate that the cell-defined SS / PBCH block is located at the center frequency (or synchronization channel raster number) of the SS / PBCH block.

PDCCH1106 may be used to indicate information (SFI: slot format indicator) indicating a transmission direction for each of the OFDM symbols included in a set of slots.

It may be shown at least based on PDCCH1106 that the SS burst set is placed in a half radio frame. For example, it may be shown that the SS burst set is placed in the half radio frame on which the PDCCH 1106 is transmitted. It may also be shown that the SS burst set is placed in the next half radio frame after the half radio frame on which the PDCCH 1106 is transmitted. Further, a half radio frame in which the SS burst set is arranged may be provided based on at least PDCCH1106.

When the PDCCH1106 indicates that an SS burst set is placed in a half radio frame and the PDCCH 1106 is used to schedule a PDSCH in the half radio frame, the PDSCH is the SS / included in the SS burst set. The resource elements used for some or all of the PBCH block candidates may be mapped.

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

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

(1) In order to achieve the above object, the aspect of the present invention has taken the following measures. That is, the first aspect of the present invention is the terminal device, which is included in the nth SS / PBCH block of the SS burst set composed of Y SS / PBCH candidates included in the half radio frame. The SS burst includes a receiving unit that receives the PBCH and an upper layer processing unit that sets a first monitoring opportunity of the first search area set in the first slot based on at least the fields included in the PBCH. The initial value of the set cycle corresponds to N _burst times of the half radio frame, and the offset from the second slot, which is the first slot of the system frame of index j, to the first slot is O * 2 ^. μ, the O is given at least based on the PBCH, the candidate value of the O corresponds to an integral multiple of the number of subframes contained in the half radio frame, and from 0 to ( _Nburst -1). A value included in the range of * 5 is included, and the μ is given based on the setting of the subcarrier interval of the PBCH.

(2) Further, in the first aspect of the present invention, when the μ is 1, the candidate value of O includes at least 10 and 15.

(3) Further, the second aspect of the present invention is the terminal device, which is the nth SS / PBCH block in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame. The SS burst set includes a receiving unit that receives the PBCH included in the PBCH, and an upper layer processing unit that sets a first monitoring opportunity of the first search area set based on at least the fields included in the PBCH. When it is the first SS burst set, the upper layer processing unit sets the first monitoring opportunity based on the field included in the SS / PBCH block, and the SS burst set is the second SS burst set. If, the field does not indicate the setting of the search region set, and the field indicates that the cell definition SS / PBCH block is at the same center frequency as the SS / PBCH block, and the cell definition SS. The / PBCH block indicates the setting of the first monitoring opportunity.

(4) Further, the third aspect of the present invention is the base station apparatus, which is the nth SS / PBCH in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame. A transmission unit for transmitting the PBCH included in the block and an upper layer processing unit for setting a first monitoring opportunity of the first search area set in the first slot based on at least the fields included in the PBCH are provided. The initial value of the cycle of the SS burst set corresponds to N _burst times of the half radio frame, and the offset from the second slot, which is the first slot of the system frame of the index j, to the first slot is It is O * 2 ^ μ, and the O is given at least based on the PBCH, and the candidate value of the O corresponds to an integral multiple of the number of subframes included in the half radio frame, and is from 0 to (N). _It includes at least a value included in the range of _burst -1) * 5, and the μ is given based on the setting of the subcarrier interval of the PBCH.

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

(6) Further, the fourth aspect of the present invention is the base station apparatus, which is the nth SS / PBCH in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame. The SS burst set includes a transmission unit that transmits the PBCH included in the block and an upper layer processing unit that sets a first monitoring opportunity of the first search area set based on at least the fields included in the PBCH. When is the first SS burst set, the upper layer processing unit sets the first monitoring opportunity based on the field included in the SS / PBCH block, and the SS burst set is the second SS burst. When set, the field does not indicate the setting of the search area set, and the field indicates that the cell definition SS / PBCH block is at the same center frequency as the SS / PBCH block, and the cell definition The SS / PBCH block indicates the setting of the first monitoring opportunity.

The program operating on the base station device 3 and the terminal device 1 according to one aspect of the present invention controls a CPU (Central Processing Unit) and the like so as to realize the functions of the above embodiment related to one aspect of the present invention. It may be a program (a program that makes a computer function). Then, the information handled by these devices is temporarily stored in RAM (Random Access Memory) at the time of processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). If necessary, the CPU reads, corrects, and writes.

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

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

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

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

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

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

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

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

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

1 (1A, 1B, 1C) Terminal device 3 Base station device 10, 30 Wireless transmission / reception section 11, 31 Antenna section 12, 32 RF section 13, 33 Base band section 14, 34 Upper layer Processing section 15, 35 Media access control layer Processing unit 16, 36 Radio resource control layer Processing unit 91, 92, 93, 94 Search area set 300 Component carrier 301 Primary cell 302, 303 Secondary cell 1101, 1102, 1103 SS burst set 1104 Type 0PDCCH Common search area set 1106 PDCCH
3000 points 3001, 3002 resource grid 3003, 3004 BWP
3011, 3012, 3013, 3014 Offset 3100, 3200 Common resource block set

Claims (10)

1. A receiver that receives the PBCH included in the nth SS / PBCH block in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame, and a receiver.
   A higher layer processing unit that sets a first monitoring opportunity of the first search area set in the first slot based on at least the fields included in the PBCH.
   The initial value of the cycle of the SS burst set corresponds to N _burst times of the half radio frame.
   The offset from the second slot, which is the first slot of the system frame of the index j, to the first slot is O * 2 ^ μ.
   The O is given at least based on the PBCH, and the candidate value of the O corresponds to an integral multiple of the number of subframes included in the half radio frame and ranges from 0 to ( _Nburst -1) * 5. Including at least the values contained in
   The μ is a terminal device given based on the setting of the subcarrier interval of the PBCH.
2. The terminal device according to claim 1, wherein when μ is 1, the candidate value of O includes at least 10 and 15.
3. A receiver that receives the PBCH included in the nth SS / PBCH block in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame, and a receiver.
   An upper layer processing unit that sets a first monitoring opportunity of a first search area set based on at least a field included in the PBCH.
   When the SS burst set is the first SS burst set, the upper layer processing unit sets the first monitoring opportunity based on the field included in the SS / PBCH block.
   When the SS burst set is a second SS burst set, the field does not indicate the setting of the first search region set, and the field is cell-defined at the same center frequency as the SS / PBCH block. Indicates that there is an SS / PBCH block,
   The cell-defined SS / PBCH block is a terminal device indicating the setting of the first monitoring opportunity.
4. A transmitter that transmits the PBCH included in the nth SS / PBCH block in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame, and a transmitter.
   A higher layer processing unit that sets a first monitoring opportunity of the first search area set in the first slot based on at least the fields included in the PBCH.
   The initial value of the cycle of the SS burst set corresponds to N _burst times of the half radio frame.
   The offset from the second slot, which is the first slot of the system frame of the index j, to the first slot is O * 2 ^ μ.
   The O is given at least based on the PBCH, and the candidate value of the O corresponds to an integral multiple of the number of subframes included in the half radio frame and ranges from 0 to ( _Nburst -1) * 5. Including at least the values contained in
   The μ is a base station apparatus given based on the setting of the subcarrier interval of the PBCH.
5. The base station apparatus according to claim 4, wherein when μ is 1, the candidate value of O includes at least 10 and 15.
6. A transmitter that transmits the PBCH included in the nth SS / PBCH block in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame, and a transmitter.
   An upper layer processing unit that sets a first monitoring opportunity of a first search area set based on at least a field included in the PBCH.
   When the SS burst set is the first SS burst set, the upper layer processing unit sets the first monitoring opportunity based on the field included in the SS / PBCH block.
   When the SS burst set is a second SS burst set, the field does not indicate the setting of the first search region set, and the field is cell-defined at the same center frequency as the SS / PBCH block. Indicates that there is an SS / PBCH block,
   The cell-defined SS / PBCH block is a base station apparatus indicating the setting of the first monitoring opportunity.
7. A communication method used for terminal devices.
   A step of receiving the PBCH included in the nth SS / PBCH block in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame, and
   A step of setting a first monitoring opportunity for a first set of search areas in a first slot, at least based on the fields contained in the PBCH.
   The initial value of the cycle of the SS burst set corresponds to N _burst times of the half radio frame.
   The offset from the second slot, which is the first slot of the system frame of the index j, to the first slot is O * 2 ^ μ.
   The O is given at least based on the PBCH, and the candidate value of the O corresponds to an integral multiple of the number of subframes included in the half radio frame and ranges from 0 to ( _Nburst -1) * 5. Including at least the values contained in
   The μ is a communication method given based on the setting of the subcarrier interval of the PBCH.
8. A communication method used for terminal devices.
   A step of receiving the PBCH included in the nth SS / PBCH block in the SS burst set composed of Y SS / PBCH candidates included in the half radio frame, and
   A step of setting a first monitoring opportunity for a first set of search areas, at least based on the fields contained in the PBCH.
   When the SS burst set is the first SS burst set, the first monitoring opportunity is set based on the field included in the SS / PBCH block.
   When the SS burst set is a second SS burst set, the field does not indicate the setting of the first search region set, and the field is cell-defined at the same center frequency as the SS / PBCH block. Indicates that there is an SS / PBCH block,
   The cell-defined SS / PBCH block is a communication method indicating the setting of the first monitoring opportunity.
9. A communication method used for base station equipment.
   A step of transmitting the PBCH included in the nth SS / PBCH block among the SS burst sets composed of Y SS / PBCH candidates included in the half radio frame, and
   A step of setting a first monitoring opportunity for a first set of search areas in a first slot, at least based on the fields contained in the PBCH.
   The initial value of the cycle of the SS burst set corresponds to N _burst times of the half radio frame.
   The offset from the second slot, which is the first slot of the system frame of the index j, to the first slot is O * 2 ^ μ.
   The O is given at least based on the PBCH, and the candidate value of the O corresponds to an integral multiple of the number of subframes included in the half radio frame and ranges from 0 to ( _Nburst -1) * 5. Including at least the values contained in
   The μ is a communication method given based on the setting of the subcarrier interval of the PBCH.
10. A communication method used for base station equipment.
    A step of transmitting the PBCH included in the nth SS / PBCH block among the SS burst sets composed of Y SS / PBCH candidates included in the half radio frame, and
    A step of setting a first monitoring opportunity for a first set of search areas, at least based on the fields contained in the PBCH.
    When the SS burst set is the first SS burst set, the first monitoring opportunity is set based on the field included in the SS / PBCH block.
    When the SS burst set is a second SS burst set, the field does not indicate the setting of the first search region set, and the field is cell-defined at the same center frequency as the SS / PBCH block. Indicates that there is an SS / PBCH block,
    The cell-defined SS / PBCH block is a communication method indicating the setting of the first monitoring opportunity.

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