JP2023056021A - Terminal device, base station device, and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base station device for efficiently communicating and a communication method used in the base station device.

SOLUTION: A terminal device for communicating with a base station device in a serving cell includes a radio resource control (RRC) layer processing unit and a receiving unit. The RRC layer processing unit, in the serving cell, sets a downlink bandwidth part (BWP) given by first system information, sets the downlink BWP as an active downlink BWP, and in the serving cell, further sets a control resource set given based on a MIB. The receiving unit, in the active downlink BWP, monitors a first PDCCH accompanied by a first DCI format, and also monitors a second PDCCH accompanied by a second DCI format.

SELECTED DRAWING: Figure 8

COPYRIGHT: (C)2023,JPO&INPIT

Description

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

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

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

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

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

(1) A first aspect of the present invention is a terminal device that communicates with a base station device in a serving cell, comprising: an RRC layer processing unit and a receiving unit; set the downlink BWP (BandWidth Part) given by the system information of, the downlink BWP is set to the active downlink BWP, the RRC layer processing unit is further provided based on the MIB in the serving cell configuring a control resource set, wherein the receiver monitors a first PDCCH with a first DCI format and monitors a second PDCCH with a second DCI format in the active downlink BWP; The receiving unit calculates a first bit size of a first resource allocation field for PDSCH in the first DCI format based on the number of resource blocks specifying a frequency band for the active downlink BWP. and calculating a second bit size of a second resource allocation field for the PDSCH in the second DCI format based on the number of resource blocks specifying a frequency band for the control resource set; The receiver monitors a PDCCH used for scheduling the first system information on the control resource set.

(2) A second aspect of the present invention is a base station apparatus that communicates with a terminal device in a serving cell, comprising an RRC layer processing unit and a transmitting unit, wherein the RRC layer processing unit, in the serving cell, first set the downlink BWP (BandWidth Part) given by the system information of, the downlink BWP is set to the active downlink BWP, the RRC layer processing unit is further provided based on the MIB in the serving cell configure a control resource set, the transmitting unit transmits a first PDCCH with a first DCI format and a second PDCCH with a second DCI format in the active downlink BWP; The transmitting unit calculates a first bit size of a first resource allocation field for PDSCH in the first DCI format based on the number of resource blocks specifying a frequency band for the active downlink BWP. and calculating a second bit size of a second resource allocation field for the PDSCH in the second DCI format based on the number of resource blocks specifying a frequency band for the control resource set; The transmitter transmits a PDCCH used for scheduling the first system information on the control resource set.

(3) A third aspect of the present invention is a communication method for a terminal device that communicates with a base station device in a serving cell, in which a downlink BWP (BandWidth Part) given by first system information is set in the serving cell. and the downlink BWP is set to an active downlink BWP, in the serving cell, a set of control resources given based on MIB, and in the active downlink BWP, a first DCI format with a first DCI format. monitoring a PDCCH and monitoring a second PDCCH with a second DCI format; setting a first bit size of a first resource allocation field for PDSCH in the first DCI format to the active downlink; Calculate based on the number of resource blocks that identify the frequency band for BWP, and the second bit size of the second resource allocation field for PDSCH in the second DCI format, the control resource set and monitor the PDCCH used for scheduling the first system information in the control resource set.

(4) A fourth aspect of the present invention is a communication method for a base station apparatus that communicates with a terminal apparatus in a serving cell, in which a downlink BWP (BandWidth Part) given by first system information is set in the serving cell. and the downlink BWP is set to an active downlink BWP, in the serving cell, a set of control resources given based on MIB, and in the active downlink BWP, a first DCI format with a first DCI format. transmitting a PDCCH and transmitting a second PDCCH with a second DCI format, and setting a first bit size of a first resource allocation field for PDSCH in the first DCI format to the active downlink; Calculate based on the number of resource blocks that identify the frequency band for BWP, and the second bit size of the second resource allocation field for PDSCH in the second DCI format, the control resource set The PDCCH used for scheduling the first system information is transmitted on the control resource set.

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

1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment; FIG. 7 is an example showing the relationship among N ^slot _symb , subcarrier spacing setting μ, slot setting, and CP setting according to one aspect of the present embodiment. FIG. 4 is a schematic diagram illustrating an example of a resource grid in a subframe according to one aspect of the present embodiment; FIG. 4 illustrates an example method for determining the size of a resource allocation information field according to one aspect of the present embodiments; FIG. 12 illustrates an example of a CBP indication information field according to one aspect of the present embodiments; FIG. 4 is a diagram illustrating an example of SS block mapping according to an aspect of the present embodiment; FIG. 10 illustrates an example of carrier band part adaptation in accordance with an aspect of the present embodiments; It is a figure which shows the operation example of the timer which concerns on one aspect|mode of this embodiment. FIG. 4 is a diagram illustrating an example of a method of allocating resource blocks according to an aspect of the present embodiment; 1 is a schematic block diagram showing the configuration of a terminal device 1 according to one aspect of the present embodiment; FIG. 1 is a schematic block diagram showing the configuration of a base station device 3 according to one aspect of the present embodiment; FIG.

Embodiments of the present invention will be described below.

FIG. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment. In FIG. 1, the radio communication system includes terminal devices 1A to 1C and a base station device 3. FIG. Terminal devices 1A to 1C are also referred to as terminal device 1 hereinafter.

The frame configuration will be described below.

At least OFDM (Orthogonal Frequency Division Multiplex) is used in the radio communication system according to one aspect of the present embodiment. An OFDM symbol, which is the time-domain unit of OFDM, includes at least one or more subcarriers and is converted into a time-continuous signal in baseband signal generation.

The subcarrier spacing (SCS: SubCarrier Spacing) may be given by the subcarrier spacing Δf=2 ^μ ·15 kHz. For example, μ may have any value from 0-5. Carrier band part (CBP)
part), μ used for subcarrier spacing setting may be given by a higher layer parameter (subcarrier spacing setting μ).

In the wireless communication system according to one aspect of the present embodiment, a time unit (time unit) _Ts is used to express the length of the time domain. The time unit T _s is given by T _s =1/(Δf _max ·N _f ). Δf _max may be the maximum subcarrier spacing supported in the wireless communication system according to one aspect of the present embodiment. Δf _max may be Δf _max =480 kHz. The time unit _Ts is also referred to as _Ts . The constant κ is κ=Δf _max ·N _f /(Δf _ref N _f,ref )=64. Δf _ref is 15 kHz and N _f,ref is 2048.

The constant κ may be a value that indicates the relationship between the reference subcarrier spacing and _Ts . A constant κ may be used for the subframe length. Based at least on a constant κ, the number of slots included in a subframe may be given. Δf _ref is the reference subcarrier spacing, and N _f,ref is a value corresponding to the reference subcarrier spacing.

Downlink transmissions and/or uplink transmissions consist of 10 ms long frames. A frame consists of 10 subframes. A subframe has a length of 1 ms. The frame length may be a value that does not depend on the subcarrier spacing Δf. That is, frame settings may be given without being based on μ. The subframe length may be a value that does not depend on the subcarrier spacing Δf. That is, subframe settings may be given without being based on μ.

For subcarrier spacing configuration μ (subcarrier spacing configuration), the number and index of slots included in a subframe may be given. For example, the first slot number n ^μ _s may be given in ascending order in the range from 0 to N ^{subframe, μ} _slot within the subframe. For the subcarrier spacing setting μ, the number and index of the slots contained in the frame may be given. For example, the second slot numbers n ^μ _s,f may be given in ascending order in the range from 0 to N ^frame,μ _slot within the frame. N ^slot _symb consecutive OFDM symbols may be included in one slot. N ^slot _symb is the slot configuration (slot
configuration) and at least based on some or all of CP (Cyclic Prefix) settings. The slot configuration may be given by the higher layer parameter slot_configuration. The CP settings may be given based at least on higher layer parameters.

FIG. 2 is an example showing the relationship among N ^slot _symb , subcarrier spacing setting μ, slot setting, and CP setting according to one aspect of the present embodiment. In FIG. 2A, when the slot setting is 0 and the CP setting is normal CP (normal cyclic prefix), N ^slot _symb =14, N ^{frame, μ} _slot =40, N ^{subframe, μ} _slot =4. Also, in FIG. 2B, when the slot setting is 0 and the CP setting is an extended CP (extended cyclic prefix), N ^slot _symbol =12, N ^{frame, μ} _slot =40, and N ^{subframe, μ} _slot =4. . The N ^slot _symbs in slot configuration 0 may correspond to twice the N ^slot _symbs in slot configuration 1 .

Physical resources are described below.

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

For each subcarrier spacing setting and carrier set, a resource grid of ^N _RB,x N ^RB _sc subcarriers and N ^(μ) _symb N ^subframe, _symb OFDM symbols is provided. N ^μ _RB,x may denote the number of resource blocks given for subcarrier spacing μ for carrier x. Carrier x indicates either a downlink carrier or an uplink carrier. That is, x is "DL" or "UL". N ^μ _RB is a designation including N ^μ _{RB, DL} and N ^μ _{RB, UL} . N ^RB _sc may indicate the number of subcarriers included in one resource block. One resource grid may be provided per antenna port p and/or per subcarrier spacing setting μ and/or per Transmission direction setting. The transmission direction includes at least a downlink (DL: DownLink) and an uplink (UL: UpLink). Hereinafter, a parameter set that includes at least some or all of the antenna port p, the subcarrier spacing setting μ, and the transmission direction setting is also referred to as a first radio parameter set. That is, one resource grid may be provided for each first radio parameter set.

In downlink, a carrier corresponding to a serving cell is called a downlink carrier (or downlink component carrier). In uplink, a carrier corresponding to a serving cell is called an uplink carrier (uplink component carrier). Downlink component carriers and uplink component carriers are collectively referred to as component carriers.

Each element in the resource grid given for each first radio parameter set is called a resource element. A resource element is identified by an index k in the frequency domain and an index l in the time domain. A resource element identified by a frequency domain index k and a time domain index l is also referred to as a resource element (k, l). The index k in the frequency domain indicates any value from 0 to N ^μ _RB N ^RB _sc −1. N ^μ _RB may be the number of resource blocks provided for the subcarrier spacing setting μ. N ^RB _sc is the number of subcarriers included in the resource block, and N ^RB _sc =12. The frequency domain index k may correspond to the subcarrier index. The time domain index l may correspond to the OFDM symbol index.

FIG. 3 is a schematic diagram illustrating an example of a resource grid in a subframe according to one aspect of the present embodiment. In the resource grid of FIG. 3, the horizontal axis is index l in the time domain, and the vertical axis is index k in the frequency domain. In one subframe, the frequency domain of the resource grid may include N ^μ _RB N ^RB _sc subcarriers, and the time domain of the resource grid may include 142 ^μ OFDM symbols. A resource block is configured to include N ^RB _sc subcarriers. The time domain of a resource block may correspond to one OFDM symbol. A time domain of a resource block may correspond to one or more slots. A time domain of a resource block may correspond to one subframe.

The terminal device 1 may be instructed to transmit and receive using only a subset of the resource grid. A subset of the resource grid is also referred to as a carrier band part, which may be given by higher layer parameters and/or DCI. A carrier band part is also called a band part (BP: bandwidth part). In other words, the terminal device does not have to be instructed to perform transmission and reception using all sets of resource grids. In other words, the terminal device may be instructed to perform transmission/reception using some of the resources within the resource grid. One carrier band part may consist of multiple resource blocks in the frequency domain. One carrier band part may be composed of a plurality of continuous resource blocks in the frequency domain. A carrier band part is also called a BWP (BandWidth Part). A carrier band part set for a downlink carrier is also called a downlink carrier band part. A carrier band part configured for an uplink carrier is also called an uplink carrier band part.

A set of downlink carrier band parts may be configured for each serving cell. A set of downlink carrier band parts may include one or more downlink carrier band parts. A set of uplink carrier band parts may be configured for each serving cell. A set of uplink carrier band parts may include one or more uplink carrier band parts.

The upper layer parameters are parameters included in the upper layer signal. The higher layer signal may be RRC (Radio Resource Control) signaling or MAC CE (Medium Access Control Control Element). Here, the higher layer signal may be an RRC layer signal or may be a MAC layer signal.

The higher layer signaling may be common RRC signaling. Common RRC signaling comprises at least some or all of features C1 to C3 below.
Feature C1) Mapped to BCCH logical channel or CCCH logical channel Feature C2) Feature containing at least the radioResourceConfigCommon information element C3) Mapped to PBCH

The radioResourceConfigCommon information element may contain information indicating settings commonly used in the serving cell. The settings commonly used in the serving cell may include at least PRACH settings. The PRACH configuration may indicate at least a set of one or more random access preamble indices. The PRACH configuration may indicate at least PRACH time/frequency resources.

The higher layer signaling may be dedicated RRC signaling. Dedicated RRC signaling comprises at least some or all of the following features D1 to D2.
Feature D1) Mapped to a DCCH logical channel Feature D2) Contains at least the radioResourceConfigDedicated information element

The radioResourceConfigDedicated information element may include at least information indicating settings unique to the terminal device 1 . The radioResourceConfigDedicated information element may include at least information indicating the configuration of carrier band part 512 and/or carrier band part 513 . A configuration of the carrier band part 512 may indicate at least frequency resources of the carrier band part 512 . The configuration of the carrier band part 513 may indicate at least frequency resources of the carrier band part 513 .

For example, MIB, first system information and second system information may be included in common RRC signaling. Also, higher layer messages that are mapped to the DCCH logical channel and include at least radioResourceConfigCommon may be included in common RRC signaling. Also, higher layer messages that are mapped to the DCCH logical channel and do not contain radioResourceConfigCommon may be included in the dedicated RRC signaling. Also, higher layer messages that are mapped to the DCCH logical channel and include at least radioResourceConfigDedicated may be included in the dedicated RRC signaling.

The first system information may include at least a time index of an SS (Synchronization Signal) block (SS/PBCH block). The first system information may include at least information related to PRACH resources. The first system information may include at least information related to initial connection setup. The second system information may be system information other than the first system information.

The radioResourceConfigDedicated information element may include at least information related to PRACH resources. The radioResourceConfigDedicated information element may include at least information related to initial connection setup.

Physical channels and physical signals according to various aspects of the present embodiments are described below.

An uplink physical channel may correspond to a set of resource elements that carry information originating in higher layers. An uplink physical channel is a physical channel used in uplink. In a radio communication system according to an aspect of the present embodiment, at least some or all of the following uplink physical channels are 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 uplink control information includes channel state information (CSI: Channel State Information) of the downlink physical channel, scheduling request (SR: Scheduling Request), downlink data (TB: Transport block, MAC PDU: Medium Access Control Protocol Data Unit, DL-SCH: Downlink-Shared Channel, PDSCH: Physical Downlink Shared Channel) includes part or all of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement). HARQ-ACK may indicate ACK (acknowledgment) or NACK (negative-acknowledgement) corresponding to downlink data.

HARQ-ACK may indicate ACK or NACK corresponding to each of one or more CBGs (Code Block Groups) included in downlink data. HARQ-ACK is also called HARQ feedback, HARQ information, HARQ control information, and ACK/NACK.

The scheduling request may be used at least to request PUSCH (UL-SCH: Uplink-Shared Channel) resources for initial transmission.

The channel state information (CSI) includes at least a channel quality indicator (CQI) and a rank indicator (RI). The channel quality indicator may include a Precoder Matrix Indicator (PMI). CQI is a metric related to channel quality (propagation strength), and PMI is a metric that indicates a precoder. RI is an index that indicates the transmission rank (or the number of transmission layers).

PUSCH is used to transmit uplink data (TB, MAC PDU, UL-SCH, PUSCH). PUSCH may be used to transmit HARQ-ACK and/or channel state information along with uplink data. PUSCH may also be used to transmit channel state information only, or HARQ-ACK and channel state information only. PUSCH is used to transmit the random access message 3.

PRACH is used to transmit a random access preamble (random access message 1). PRACH performs initial connection establishment procedure, handover procedure, connection re-establishment procedure, synchronization (timing adjustment) for transmission of uplink data, and PUSCH (UL-SCH) resource request. used to indicate The random access preamble may be used to notify the base station apparatus 3 of an index (random access preamble index) given by the upper layer of the terminal apparatus 1 .

A random access preamble may be given by cyclically shifting the Zadoff-Chu sequence corresponding to the physical root sequence index u. A Zadoff-Chu sequence may be generated based on the physical root sequence index u. Multiple random access preambles may be defined in one serving cell. The random access preamble may be identified based at least on the index of the random access preamble. Different random access preambles corresponding to different indices of the random access preamble may correspond to different combinations of physical root sequence index u and cyclic shift. A physical root sequence index u and a cyclic shift may be given based at least on information contained in the system information. The physical root sequence index u may be an index that identifies a sequence included in the random access preamble. A random access preamble may be identified based at least on the physical root sequence index u.

In FIG. 1, the following uplink physical signals are used in uplink radio communication. Uplink physical signals may not be used to transmit information output from higher layers, but are used by the physical layer.
・UL DMRS (UpLink Demodulation Reference Signal)
・SRS (Sounding Reference Signal)
・UL PTRS (UpLink Phase Tracking Reference
Signal)

UL DMRS is associated with transmission of PUSCH and/or PUCCH. UL
DMRS is multiplexed with PUSCH or PUCCH. The base station apparatus 3 may use UL DMRS to perform channel correction for PUSCH or PUCCH. In the following, transmitting together the PUSCH and the UL DMRS associated with the PUSCH is simply referred to as transmitting the PUSCH. Hereinafter, transmitting together the PUCCH and the UL DMRS associated with the PUCCH is simply referred to as transmitting the PUCCH. UL DMRS related to PUSCH is also referred to as UL DMRS for PUSCH. UL DMRS related to PUCCH is also referred to as UL DMRS for PUCCH.

SRS may not be associated with PUSCH or PUCCH transmission. The base station apparatus 3 may use SRS for channel state measurement. The SRS may be sent at the end of a subframe in an uplink slot or at a predetermined number of OFDM symbols from the end.

The UL PTRS may be the reference signal used at least for phase tracking. A UL PTRS may relate to a UL DMRS group that includes at least the antenna ports used for one or more UL DMRSs. The association between the UL PTRS and the UL DMRS group may be that at least some or all of the antenna ports of the UL PTRS and the antenna ports included in the UL DMRS group are QCL. A UL DMRS group may be identified based at least on the lowest index antenna port in the UL DMRSs included in the UL DMRS group.

In FIG. 1, the following downlink physical channels are used in downlink radio communication from the base station apparatus 3 to the terminal apparatus 1. FIG. Downlink physical channels are used by the physical layer to transmit information output from higher layers.
・PBCH (Physical Broadcast Channel)
・PDCCH (Physical Downlink Control Channel)
・PDSCH (Physical Downlink Shared Channel)

PBCH is used to transmit a master information block (MIB: Master Information Block, BCH, Broadcast Channel). PBCH may be transmitted based on a predetermined transmission interval. For example, PBCH may be transmitted at intervals of 80 ms. The information content contained in the PBCH may be updated every 80ms. The PBCH may consist of 288 subcarriers. The PBCH may consist of 2, 3, or 4 OFDM symbols. The MIB may contain information relating to the identifiers (indexes) of the synchronization signals. The MIB may contain information indicating at least part of the slot number, subframe number, and radio frame number in which the PBCH is transmitted.

PDCCH is used to transmit downlink control information (DCI: Downlink Control Information). The downlink control information is also called DCI format. The downlink control information may include at least either a downlink grant or an uplink grant. A DCI format used for PDSCH scheduling may be referred to as a downlink grant. A DCI format used for PUSCH scheduling may be referred to as an uplink grant. A downlink grant is also called a downlink assignment or downlink allocation.

The DCI format includes at least a TBS information field mapped to information bits indicating at least a transport block size (TBS) transmitted on the PDSCH, and a set of resource blocks to which the PDSCH is mapped in the frequency domain. A resource allocation information field mapped to information bits indicating, an MCS information field mapped to information bits indicating at least a modulation scheme for the PDSCH, at least a HARQ process number corresponding to the transport block HARQ process number information field mapped to information bits indicating, NDI indication information field mapped to information bits indicating at least an NDI (New Data Indicator) corresponding to the transport block, and for the transport block may include at least some or all of the RV information field mapped to information bits indicating at least the RV (Redundancy Version) of the .

One or more information fields included in the DCI format may be mapped to information bits provided by joint coding of multiple indication information. For example, a DCI format may include an MCS information field that is mapped to information bits provided at least based on joint coding of information related to the TBS and information indicating the modulation scheme of the PDSCH.

The DCI format may be either the first DCI format or the second DCI format. Some or all of the fields included in the first DCI format may be provided at least based on dedicated RRC signaling. The set of information fields included in the second DCI format may be provided regardless of dedicated RRC signaling. A set of information fields included in the second DCI format may be provided based on common RRC signaling.

The size of the resource allocation information field included in the first DCI format may be given at least based on dedicated RRC signaling. The size of the resource allocation information field included in the second DCI format may be given regardless of dedicated RRC signaling. The size of the resource allocation information field included in the second DCI format may be given based on common RRC signaling.

The size of the resource allocation information field may be given based at least on the number of resource blocks included in the carrier band part in the frequency domain.

FIG. 4 is a diagram illustrating an example method for determining the size of a resource allocation information field according to one aspect of the present embodiments. In FIG. 4, the number N _{RB_CBP} of resource blocks included in the carrier band part in the frequency domain is set to 27. In FIG. The RBG size N _RBG is set to 4 in the pattern A of FIG. 4, and the RBG size N _RBG is set to 2 in the pattern B of FIG. In pattern A of FIG. 4, the number N _{RBG_CBP} of RBGs (Resource Block Groups) in the carrier band part is seven. In pattern B of FIG. 4, the number N _{RBG_CBP} of RBGs in the carrier band part is fourteen. The number N _{RBG_CBP} of RBGs in the carrier band part is given based on at least the number N _{RB_CBP} of resource blocks included in the carrier band part in the frequency domain and the size of the RBGs N _RBG . The number N _{RBG_CBP} of RBGs in the carrier band part may be given by N _{RBG_CBP} =ceil(N _{RB_CBP} /N _RBG ). where ceil(X _value ) may be the ceiling function for X _value . ceil(X _value ) may be the smallest integer not less than X _value . The number N _{RBG_CBP} of RBGs in the carrier band part may be given by N _{RBG_CBP} =floor(N _{RB_CBP} /N _RBG ). where floor(X _value ) may be the floor function for X _value . floor(X _value ) may be the largest integer that does not exceed X _value .

In various aspects of this embodiment, the number of resource blocks refers to the number of resource blocks in the frequency domain, unless otherwise specified.

In the first resource allocation method, the size of the resource allocation information field may be the same as the number of RBGs (Resource Block Groups). A first resource allocation method is a method of indicating a set of resource blocks to which the PDSCH is mapped using an RBG bitmap.

In the second resource allocation method, the size of the resource allocation information field may be given by ceil(log ₂ (N _{RB_CBP} × (N _{RB_CBP} −1)/2)). In the second resource allocation method, the size of the resource allocation information field may be given by ceil(log ₂ (N _{RBG_CBP} ×(N _{RBG_CBP} −1)/2)). A second resource allocation method may be to indicate consecutive resource block indices as a set of resource blocks to which the PDSCH is mapped. In the second resource allocation method, among the resource blocks included in the carrier band part, the resource blocks corresponding to the resource block indices between the two selected resource block indices are used as a set of resource blocks to which the PDSCH is mapped. It may be a method shown. A second resource allocation method may be to indicate consecutive RBG indices as a set of resource blocks to which the PDSCH is mapped. A second resource allocation method is a method of indicating RBGs corresponding to RBG indexes between two selected RBG indexes among RBGs included in the carrier band part as a set of resource blocks to which PDSCH is mapped. may

One downlink grant is used at least for scheduling one PDSCH in one serving cell. A downlink grant is used at least for scheduling the PDSCH in the same slot in which the downlink grant was transmitted.

One uplink grant is used at least for scheduling one PUSCH in one serving cell.

One physical channel may be mapped to one serving cell. One physical channel may not be mapped to multiple serving cells.

The first DCI format may include a CBP indication information field. The CBP indication information field may indicate at least the carrier band part set to the active carrier band width part. An active carrier band part for a downlink carrier is also called a downlink active carrier band width part. The active carrier band part for an uplink carrier is the uplink active carrier band part (Uplink
Also called an active carrier bandwidth part. The terminal device 1 can receive at least the PDCCH and the PDSCH in the downlink active carrier band part. Also, the terminal device 1 can receive at least PUCCH and PUSCH in the uplink active carrier band part. Also, PDCCH and PDSCH may not be received in carrier band parts other than the downlink active carrier band part. Also, PUCCH and PUSCH may not be transmitted in carrier band parts other than uplink active carrier band parts.

The first DCI format used for PDSCH scheduling is also called a first downlink DCI format. The first DCI format used for PUSCH scheduling is also called the first uplink DCI format. The first downlink DCI format and the first uplink DCI format are also referred to as the first DCI format.

FIG. 5 is a diagram illustrating an example of a CBP indication information field according to one aspect of the present embodiments. In FIG. 5, the size of the CBP indication information field is 2 bits. For each codepoint of the information bits to which the CBP indication information field is mapped, a carrier band part may correspond, as shown in FIG. The size of the CBG indication information field may be 1 bit, 3 bits, or any other number of bits.

There may be one downlink active carrier band part for a given downlink carrier. There may be one uplink active carrier band part for a given uplink carrier.

There may be multiple downlink active carrier band parts for a given downlink carrier. There may be multiple uplink active carrier band parts for a given uplink carrier.

In FDD (Frequency Division Duplex) mode, the downlink active carrier band part and the uplink active carrier band part may not correspond. In TDD (Time Division Duplex) mode, the downlink active carrier band part and the uplink active carrier band part may correspond. The correspondence between the downlink active carrier band part and the uplink active carrier band part may be that the center frequency of the downlink active carrier band part matches the center frequency of the uplink active carrier band part. The downlink active carrier band part and the uplink active carrier band part correspond to the configurable carrier frequencies (e.g., minimum carrier frequency and maximum carrier frequency) and uplink active carrier band for the downlink active carrier band part. Carrier frequencies (for example, the minimum carrier frequency and the maximum carrier frequency) that can be set for the parts may match. Correspondence between the downlink active carrier band part and the uplink active carrier band part means that the resource offset value N _{offset_CBP} associated with the downlink active carrier band part and the resource offset value N _{offset_CBP} associated with the uplink active carrier band part match. It may be to The correspondence between the downlink active carrier band part and the uplink active carrier band part is the range of available resource block indices for the downlink active carrier band part and the available resources for the uplink active carrier band part. It may be that the ranges of the block indices match. If the downlink active carrier band part and the uplink active carrier band part correspond, the CBP indication information field may indicate both the configuration of the downlink active carrier band part and the configuration of the uplink active carrier band part. .

The CBP indication information field may indicate at least the downlink carrier band part that is set to the downlink active carrier band part. A PDSCH scheduled with a DCI format that includes the CBP indication information field may be received in the downlink carrier band part. The CBP indication information field may indicate at least the downlink carrier band part that receives the PDSCH scheduled according to the DCI format containing the CBP indication information field. The CBP indication information field may include at least information indicating an uplink carrier band part for transmitting PUSCH scheduled according to the DCI format including the CBP indication information field.

The second DCI format may not include the CBP indication information field.

The second DCI format used for PDSCH scheduling is also called a second downlink DCI format. The second DCI format used for PUSCH scheduling is also called a second uplink DCI format. The second downlink DCI format and the second uplink DCI format are also referred to as the second DCI format.

The terminal device 1 is configured with one or more control resource sets (CORESET: Control Resource Set) for PDCCH search. The terminal device 1 attempts to receive the PDCCH in one or more control resource sets.

A control resource set may indicate a time-frequency region to which one or more PDCCHs may be mapped. The control resource set may be a region in which the terminal device 1 attempts to receive the PDCCH. The control resource set may consist of contiguous resources (localized resources). A control resource set may be composed of non-contiguous resources (distributed resources).

In the frequency domain, the unit of mapping of the control resource set may be a resource block. For example, in the frequency domain, the unit of mapping of the control resource set may be 6 resource blocks. In the time domain, the unit of mapping of the control resource set may be an OFDM symbol. For example, in the time domain, the unit of mapping of the control resource set may be one OFDM symbol.

The frequency domain of the control resource set may be the same as the system bandwidth of the serving cell. Also, the frequency domain of the control resource set may be given based at least on the system bandwidth of the serving cell. The frequency domain of the control resource set may be given based at least on higher layer signaling and/or downlink control information.

The time domain of the control resource set may be given based at least on higher layer signaling and/or downlink control information.

A control resource set may be a common control resource set. A common control resource set may be a control resource set that is commonly configured for a plurality of terminal devices 1 . The common control resource set may be provided based at least on part or all of the MIB, first system information, second system information, common RRC signaling, and cell ID. For example, the time resources and/or frequency resources of the control resource set configured to monitor the PDCCH used for scheduling the first system information may be given at least based on the MIB.

A given control resource set may be a dedicated control resource set. A dedicated control resource set may be a control resource set configured to be used exclusively for the terminal device 1 . A dedicated control resource set may be granted based at least on dedicated RRC signaling and some or all of the value of the C-RNTI.

A control resource set may include a set of PDCCHs (or PDCCH candidates) that the terminal device 1 monitors. A control resource set may be configured to include one or more search areas (search spaces, SS: Search Space).

A certain search area comprises one or more PDCCH candidates of a certain aggregation level. The terminal device 1 receives the PDCCH candidates included in the search area and attempts to receive the PDCCH. Here, the PDCCH candidates are also called blind detection candidates.

A set of search areas comprises one or more search areas. A set of search areas may be CSS (Common Search Space). The CSS may be provided based at least on part or all of the MIB, primary system information, secondary system information, common RRC signaling, and cell ID. The CSS may be configured for monitoring the second DCI format. Monitoring of the first DCI format in the CSS may not be configured. The CSS may correspond to the second DCI format.

A set of search areas may be USS (UE-specific Search Space). USS may be granted based at least on dedicated RRC signaling and some or all of the value of the C-RNTI. A USS may be configured for monitoring a first DCI format and/or a second DCI format. A USS may support a first DCI format and/or a second DCI format.

The common control resource set may include at least one or both of CSS and USS. The dedicated control resource set may include at least one or both of CSS and USS.

The physical resources of the search area are configured by control channel configuration units (CCEs: Control Channel Elements). A CCE is composed of a predetermined number of Resource Element Groups (REGs). For example, a CCE may consist of 6 REGs. A REG may consist of one OFDM symbol of one PRB (Physical Resource Block). That is, the REG may be configured including 12 resource elements (REs). A PRB is also simply called an RB (Resource Block).

PDSCH is used to transmit downlink data (DL-SCH, PDSCH). PDSCH is used at least to transmit random access message 2 (random access response). PDSCH is used at least to transmit system information including parameters used for initial access.

The PDSCH is provided based at least on some or all of scrambling, modulation, layer mapping, precoding, and Mapping to physical resources. A terminal device 1 may assume that the PDSCH is provided based at least on part or all of scrambling, modulation, layer mapping, precoding and physical resource mapping.

In scrambling, for a codeword q, a block of bits b ^(q) (i) is scrambled based at least on a scrambling sequence c ^(q) (i) to produce b ^(q) _sc (i) may be In the block of bits b ^(q) (i), i denotes a value ranging from 0 to M ^(q) _bit −1. M ^(q) _bit may be the number of bits of codeword q sent on the PDSCH. The scrambling sequence c ^(q) (i) may be a sequence given at least based on a pseudorandom function (eg, M sequence, Gold sequence, etc.). In scrambling, for codeword q, a block of bits b ^(q) (i) is scrambled based on the scrambling sequence c ^(q) (i) and equation (1) below to obtain a block of scrambled bits b ^(q) _sc (i) may be generated.

mod(A,B) may be a function that outputs the remainder of A divided by B. mod(A,B) may be a function that outputs a value corresponding to the remainder of A divided by B.

In modulation, for codeword q, a block of scrambled bits b ^(q) _sc (i) is modulated according to a predetermined modulation scheme to produce a block of complex-valued modulation symbols d ^(q) (i). good. The predetermined modulation scheme may include at least part or all of QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, and 256QAM. Note that the predetermined modulation scheme may be given at least based on the DCI that schedules the PDSCH.

In layer mapping, the block of complex-valued modulation symbols d ^(q) (i) for each codeword is mapped to one or more layers according to a predetermined mapping procedure, and the block of complex-valued modulation symbols x(i ) may be generated. A block x(i) of complex-valued modulation symbols is x(i)=[x ⁽⁰⁾ (i) . . . x ^(v−1) (i)]. where v is the number of layers for PDSCH.

In precoding, a block x(i) of complex-valued modulation symbols may be precoded. In precoding, a block x(i) of complex-valued modulation symbols may be transformed into a block x(i) of complex-valued modulation symbols for v antenna ports. The number of antenna ports for PDSCH and the number of layers for PDSCH may be the same.

In mapping to physical resources (physical resource mapping), a block x ^(p) (i) of complex-valued modulation symbols for antenna port p is a resource element satisfying at least some or all of elements A to E below. , may be preferentially mapped from resource elements (k, l) of resource blocks allocated for the PDSCH. Here, the frequency-prioritized map means k to k+M (M is a predetermined value) of symbol l of resource element (k, l), k to k+M of symbol l+1, . . . , symbol l+N (N is (predetermined value) may be mapped from k to k+M. In physical resource mapping, a block of complex-valued modulation symbols x ^(p) (i) for antenna port p is composed of resource elements ( k, l) may be mapped in time priority. Here, the time-prioritized map is defined from symbol l of subcarrier index (resource element index) k of resource element (k, l) to l+N (N is a predetermined value), and from symbol l of subcarrier index k+1. It is also possible to map l+N, .
Element A) resource element element to which DL DMRS associated with PDSCH is mapped B) resource element element to which DL PTRS associated with the DL DMRS is mapped C) CSI-RS is configured and/or CSI-RS D) the resource element element in which the SS block is configured and/or the resource element element in which the SS block is transmitted E) the reserved resource

The resource blocks allocated for PDSCH (the resource blocks to which PDSCH is mapped) are given based at least on the Resource Allocation Information field included in the DCI format. The details of the resource block indicated by the resource allocation information field will be described later.

In FIG. 1, the following downlink physical signals are used in downlink wireless communication. Downlink physical signals may not be used to transmit information output from higher layers, but are used by the physical layer.
・Synchronization signal (SS)
・DL DMRS (DownLink DeModulation Reference Signal)
・Shared RS (Shared Reference Signal)
・CSI-RS (Channel State Information-Reference Signal)
・DL PTRS (Down Link Phase Tracking Reference Signal)
・TRS (Tracking Reference Signal)

The synchronization signal is used by the terminal device 1 to synchronize downlink frequency domain and/or time domain. Synchronization signals include PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal).

The SS block (SS/PBCH block) includes at least part or all of the PSS, SSS, and PBCH. The respective antenna ports of the PSS, SSS, and some or all of the PBCH included in the SS block may be the same. Some or all of the PSS, SSS, and PBCH included in the SS block may be mapped to consecutive OFDM symbols. The CP settings of each of the PSS, SSS, and part or all of the PBCH included in the SS block may be the same. The subcarrier interval setting μ of each of the PSS, SSS, and part or all of the PBCH included in the SS block may be the same.

DL DMRS is associated with transmission of PBCH, PDCCH and/or PDSCH. DL DMRS is multiplexed on PBCH, PDCCH, or PDSCH. The terminal device 1 may use the DL DMRS corresponding to the PBCH, the PDCCH, or the PDSCH to perform channel correction of the PBCH, the PDCCH, or the PDSCH. In the following, the transmission of both the PBCH and the DL DMRS associated with the PBCH is simply referred to as the transmission of the PBCH. Hereinafter, the transmission of both the PDCCH and the DL DMRS associated with the PDCCH is simply referred to as the transmission of the PDCCH. Hereinafter, the transmission of the PDSCH and the DL DMRS associated with the PDSCH together is simply referred to as the transmission of the PDSCH. DL DMRS associated with PBCH is also called DL DMRS for PBCH. DL DMRS associated with PDSCH is also called DL DMRS for PDSCH. DL DMRS associated with PDCCH is also referred to as DL DMRS associated with PDCCH.

Shared RS may be associated with at least PDCCH transmission. Shared RS may be multiplexed on PDCCH. The terminal device 1 may use Shared RSs to perform PDCCH channel correction. Hereinafter, the transmission of both the PDCCH and the Shared RS associated with the PDCCH is also simply referred to as the transmission of the PDCCH.

The DL DMRS may be a reference signal configured individually for the terminal device 1 . A DL DMRS sequence may be given at least based on parameters that are individually configured for the terminal device 1 . The DL DMRS sequences may be given based at least on UE-specific values (eg, C-RNTI, etc.). DL DMRS may be sent separately for PDCCH and/or PDSCH. On the other hand, the Shared RS may be a reference signal that is commonly configured for multiple terminal devices 1 . The Shared RS sequence may be given independently of parameters that are individually configured in the terminal device 1 . For example, a sequence of Shared RSs may be given based on at least part of a slot number, a minislot number, and a cell ID (identity). A Shared RS may be a reference signal that is transmitted regardless of whether the PDCCH and/or PDSCH is transmitted.

CSI-RS may be a signal that is used at least to calculate channel state information. The CSI-RS pattern assumed by the terminal may be given by at least higher layer parameters.

The PTRS may be the signal used at least for phase noise compensation. The pattern of PTRS assumed by the terminal may be given based at least on higher layer parameters and/or DCI.

A DL PTRS may be associated with a DL DMRS group that includes at least antenna ports used for one or more DL DMRSs. The association between the DL PTRS and the DL DMRS group may be that at least some or all of the antenna ports of the DL PTRS and the antenna ports included in the DL DMRS group are QCL. A DL DMRS group may be identified based at least on the lowest index antenna port in the DL DMRSs included in the DL DMRS group.

A TRS may be a signal used at least for time and/or frequency synchronization. The TRS pattern assumed by the terminal may be given based at least on higher layer parameters and/or DCI.

Downlink physical channels and downlink physical signals are also referred to as downlink signals. Uplink physical channels and uplink physical signals are also referred to as uplink signals. Downlink signals and uplink signals are also collectively referred to as physical signals. Downlink signals and uplink signals are also collectively referred to as signals. Downlink physical channels and uplink physical channels are collectively referred to as physical channels. Downlink physical signals and uplink physical signals are collectively referred to as physical signals.

BCH, UL-SCH and DL-SCH are transport channels. Channels used in the Medium Access Control (MAC) layer are called transport channels. The unit of transport channel used in the MAC layer is also called transport block (TB) or MAC PDU. 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. At the physical layer, transport blocks are mapped to codewords, and modulation processing is performed on each codeword.

The base station device 3 and the terminal device 1 exchange (transmit and receive) signals in a higher layer. For example, the base station device 3 and the terminal device 1 transmit and receive RRC signaling (RRC message: Radio Resource Control message, RRC information: Radio Resource Control information) in a radio resource control (RRC) layer. You may Also, the base station device 3 and the terminal device 1 may transmit and receive a MAC CE (Control Element) in the MAC layer. Here, RRC signaling and/or MAC CE are also referred to as higher layer signaling.

PUSCH and PDSCH may be used at least to transmit RRC signaling and/or MAC CE. Here, the RRC signaling transmitted by the PDSCH from the base station apparatus 3 may be signaling common to a plurality of terminal apparatuses 1 within the serving cell. Common signaling for multiple terminals 1 within a serving cell is also referred to as common RRC signaling. The RRC signaling transmitted by the PDSCH from the base station apparatus 3 may be signaling dedicated to a certain terminal apparatus 1 (also referred to as dedicated signaling or UE specific signaling). Signaling dedicated to terminal equipment 1 is also referred to as dedicated RRC signaling. Higher-layer parameters specific to the serving cell may be sent using common signaling to multiple terminal devices 1 in the serving cell or dedicated signaling to a certain terminal device 1 . UE-specific higher layer parameters may be sent using dedicated signaling to a given terminal device 1 . A PDSCH containing dedicated RRC signaling may be scheduled by the PDCCH in the first control resource set.

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

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

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

An example of an initial connection method according to one aspect of the present embodiment will be described below.

FIG. 6 is a diagram illustrating an example of SS block mapping according to an aspect of the present embodiment. In FIG. 6, the horizontal axis indicates resource block indices in the frequency domain. A resource block index in the frequency domain is also simply referred to as a resource block index. As shown in FIG. 6, the SS blocks in the frequency domain are mapped by being offset by the number of subcarriers N _offset from the reference point of the resource block index (eg, resource block #0). N _offset may be set to zero. N _offset may be set to a value other than zero. N _offset is also called a subcarrier offset. The N _offset may be given based on the information field of the MIB included in the PBCH included in the SS block. Also, a range of a predetermined number of resource blocks from a resource block index reference point may be set as a downlink initial active carrier bandwidth part in the frequency domain. In FIG. 6, downlink initially activated carrier band parts in the frequency domain are set to resource block #0 to resource block #26.

The subcarrier offset N _offset may be provided based at least on the resource grid offset N _{offset_RB_grid} and/or the resource block index offset N _{offset_RB_index} . The resource grid offset N _{offset_RB_grid} may indicate the value of the leading subcarrier index in the leading resource block to which the SS block is mapped in the frequency domain. The resource grid offset N _{offset_RB_grid} may indicate the deviation in subcarrier units between the SS block and the resource grid. The resource block index offset N _{offset_RB_index} may indicate the deviation from the resource block index reference point for the first resource block to which the SS block is mapped in the frequency domain. The resource grid offset N _{offset_RB_grid} may be given based on the information field of the MIB included in the PBCH included in the SS block. The resource block index offset N _{offset_RB_index} may be given based on the information field of the MIB included in the PBCH included in the SS block.

The downlink initial activation carrier band part may be given at least based on the band of the control resource set given at least based on the MIB. The bandwidth of the downlink initial activation carrier band part may be the same as the bandwidth of the control resource set given at least based on the MIB.

The terminal device 1 can identify the downlink initially activated carrier band part based at least on the subcarrier offset N _offset included in the PBCH included in the SS block and/or the mapping of the SS block. The terminal device 1 can set the downlink initial activation carrier band part to the downlink active carrier band part and monitor the PDCCH in the downlink initial activation carrier band part. The PDCCH may be used at least for scheduling first system information. The CRC sequence attached to the PDCCH may be scrambled at least based on SI-RNTI (System Information-Radio Network Temporary Identifier).

The terminal device 1 transmits the PRACH in the uplink active carrier band part. The first system information may include information indicating physical resources for transmitting PRACH on the uplink. Also, the first system information may include information indicating an uplink initial active carrier bandwidth part in the frequency domain. The downlink initial activation carrier band part and the uplink initial activation carrier band part are also called initial activation carrier band part. When the PRACH is transmitted, the uplink initial activation active carrier band part may be set to the uplink active carrier band part.

The terminal device 1 can set the first downlink carrier band width part as the downlink active carrier band part and monitor the PDCCH. The PDCCH may be the PDCCH that schedules the random access response (message 2 PDSCH). The CRC sequence attached to the PDCCH may be scrambled by RA-RNTI (Random Access-Radio Network Temporary Identifier). The RA-RNTI may be given based at least on the time index of the SS block. A random access response is transmitted including a random access response grant. The random access response grant is included in the random access response grant MAC CE and transmitted. Message 2 PDSCH may include a random access response grant MAC CE.

A first downlink carrier band part may be provided based at least on the first system information. The first downlink carrier band-part may be a downlink initial activation carrier band-part if the first system information does not include information related to the first downlink carrier band-part. If the first system information does not include information related to the first downlink carrier band part, the terminal device 1 may not change the configuration of the downlink active carrier band part.

The terminal device 1 transmits message 3 PUSCH based at least on the random access response grant. Message 3 PUSCH is an RRC connection
may include request.

The terminal device 1 can monitor the PDCCH in the first downlink carrier band part. The PDCCH may be used for scheduling message 4 PDSCH. Message 4 PDSCH may include a Contention resolution MAC CE (Content resolution MAC CE).

Carrier band width part adaptation in the terminal device 1 will be described below. Carrier band adaptation includes the act of changing the settings of the active carrier band part. Carrier band part adaptation may include at least changing the settings of the RF section 32 and/or changing the settings of the baseband section 33 .

The terminal device 1 may configure one downlink default carrier bandwidth part based at least on dedicated RRC signaling. If no dedicated RRC signaling indicating the downlink default carrier band part is received, the downlink initial activation carrier band part may be set to the downlink default carrier band part. Downlink initial activation if no dedicated RRC signaling including at least information indicating a downlink default carrier band part is received and the first system information does not include information indicating a first downlink carrier band part. The carrier band part may be set to the downlink default carrier band part. the first downlink carrier if no dedicated RRC signaling including at least information indicating the downlink default carrier band part is received and the first system information includes information indicating the first downlink carrier band part The band part may be set as the downlink default carrier band part.

The terminal device 1 may be configured with one or more downlink carrier band parts based at least on dedicated RRC signaling. Also, the terminal device 1 may be configured with one or more downlink carrier band parts for one serving cell based at least on dedicated RRC signaling.

FIG. 7 is a diagram illustrating an example of carrier band part adaptation according to one aspect of the present embodiments. In one example shown in FIG. 7, in serving cell 500, carrier band parts 511, 512 and 513 are configured. Also, carrier band part 511 is given by the frequency band between resource block index 501 and resource block index 502 . Also, carrier band part 512 is given by the frequency band between resource block index 503 and resource block index 504 . Also, carrier band part 513 is given by the frequency band between resource block index 505 and resource block index 506 . Here, the carrier band part 511 is set as the downlink default carrier band part.

In FIG. 7, the terminal device 1 receives PDCCH 521 in carrier band part 511 set as the downlink active carrier band part. Next, based on at least the CBP indication information field included in the DCI format included in the PDCCH 521, the terminal device 1 sets the carrier band part 512 to the downlink active carrier band part. The terminal device 1 then receives PDSCH 522 on this carrier band part 512 . Here, the DCI format included in the PDCCH 521 may be the first DCI format.

The terminal device 1 changes the configuration of the downlink active carrier band part from carrier band part 511 to carrier band part 512 after receiving PDCCH 521 and before receiving PDSCH 522 .

When the terminal device 1 sets the carrier band part 512 to the downlink active carrier band part, the timer 531 starts. If the timer 531 expires without receiving the PDCCH scheduling the PDSCH in the carrier band part 512, the terminal device 1 may set the downlink default carrier band part to the downlink active carrier band part.

Terminal device 1 then receives PDCCH 523 and PDSCH 524 in carrier band part 512 . The timer 531 may be restarted when the PDSCH (here, PDSCH 524) in the downlink active carrier band part is received.

Next, the terminal device 1 receives the PDCCH 525 in the carrier band part 512, and based on at least the CBP indication information field included in the DCI format included in the PDCCH 525, configures the downlink active carrier band part from the carrier band part 512. Change to carrier band part 513. Terminal device 1 then receives PDSCH 526 on this carrier band part 513 . Here, the DCI format included in the PDCCH 525 may be the first DCI format.

When the terminal device 1 sets the carrier band part 513 to the downlink active carrier band part, the timer 532 starts. If the timer 532 expires without receiving the PDCCH scheduling the PDSCH in the carrier band part 513, the terminal device 1 may change the downlink default carrier band part to the downlink active carrier band part.

When the timer 532 expires, the terminal device 1 sets the downlink default carrier band part to the downlink active carrier band part. Next, the terminal device 1 receives PDCCH 527 in carrier band part 511 set as the downlink default carrier band part.

A timer 531 and a timer 532 are timers for determining whether or not the terminal device 1 changes the setting of the downlink active carrier band part to the downlink default carrier band part. Hereinafter, the timers 531 and 532 are also simply referred to as timers. Whether or not to set the downlink default carrier band part to the downlink active carrier band part may be given based on at least a timer.

FIG. 8 is a diagram illustrating an operation example of a timer according to one aspect of the present embodiment. In FIG. 8 , the downlink default carrier band part may be the carrier band part 511 , and the downlink carrier band parts other than the downlink carrier band part may be the carrier band part 512 or 513 . First, in step 1, if a carrier band part other than the downlink default carrier band part is set as the downlink active carrier band part, a timer for the carrier band part other than the downlink default carrier band part is started ( step 2). Here, starting the timer may mean setting the value of the timer to an initial value. The initial value may be set for each carrier band part. That is, the timer may be initialized by the initial value of the timer corresponding to the carrier band part set in the downlink active carrier band part. Starting the timer is to start the timer for the carrier band part and discard the timer for the carrier band part before the configuration of the downlink active carrier band part is changed to that carrier band part. may

In step 3, if the PDCCH scheduling the PDSCH is received before the timer expires, go to step 4; In step 3, if no PDCCH scheduling PDSCH is received before the timer expires, go to step 5;

In step 4, if the PDSCH scheduled by the received PDCCH is the PDSCH in the downlink active carrier band part, the timer is restarted and go to step 3; The restarting of the timer may be that the value of the timer being started for the downlink active carrier band part is set to the initial value.

In step 4, if the PDSCH scheduled by the received PDCCH is a PDSCH in a carrier band part other than the downlink active carrier band part, go to step 2; In step 4, based on at least the CBP indication information field included in the DCI format included in the PDCCH, a carrier band part other than the downlink default carrier band part configured as the downlink active carrier band part may be indicated. .

In step 5, the downlink default carrier band part is set to the downlink active carrier band part and return to step 1.

The downlink default carrier band part may be the carrier band part that is set to the downlink active carrier band part when the timer expires. If the downlink default carrier band part is set to the downlink active carrier band part, the timer may not start. The timer and the initial value of the timer may not be set for the downlink default carrier band part. For each carrier band part that is not the downlink default carrier band part and that is configured by dedicated RRC signaling, a timer and/or an initial value of the timer may be configured (or associated good). A carrier band part that is not a downlink default carrier band part and that is configured by dedicated RRC signaling is also referred to as a second downlink carrier band part. That is, the second downlink carrier band part is a general term for carrier band parts other than the downlink initial activation carrier band part, the first carrier band part, and the downlink default carrier band part.

The second downlink carrier band part includes at least carrier band part 512 in serving cell 500 and carrier band part 513 in serving cell 500 .

If the first downlink DCI format for the serving cell 500 is detected in the control resource set in the downlink default carrier band part in the serving cell 500, the serving cell based at least on the CBP indication information field included in the first downlink DCI format. A carrier band part 512 in 500 may be set to a downlink active carrier band part. The carrier band part 512 may be the carrier band part indicated by the CBP indication information field. The resource allocation information field included in the first downlink DCI format indicates which resource block set of resource blocks included in the carrier band part 512 in the frequency domain to which the PDSCH is mapped. good. The size of the resource allocation information field included in the first downlink DCI format may be given based at least on the number of resource blocks included in the carrier band part 512 in the frequency domain. The size of the resource allocation information field may be set to the maximum calculated value of the size of the resource allocation information field for each of one or more downlink carrier band parts in the serving cell 500 . The size of the resource allocation information field may be configured in the frequency domain based on the maximum number of RBGs included in each of one or more downlink carrier band parts in the serving cell. That is, N _{RBG_CBP} for calculating the size of the resource allocation information field is the maximum number of RBGs included in each of one or more downlink carrier band parts configured in the serving cell 500 in the frequency domain. may The size of the resource allocation information field may be set based on the maximum number of resource blocks included in each of one or more downlink carrier band parts configured in the serving cell 500 in the frequency domain. That is, N _{RB_CBP} for calculating the size of the resource allocation information field is the maximum number of resource blocks included in each of one or more downlink carrier band parts configured in the serving cell 500 in the frequency domain. There may be. RBG size N _RBGs may be configured for each of one or more downlink carrier band parts. The size of the resource allocation information field included in the first downlink DCI format may be given at least based on dedicated RRC signaling.

The size of the resource allocation information field included in the first DCI format may be given per serving cell.

In FDD mode, if the first uplink DCI format for the serving cell 500 is detected in the control resource set in the downlink default carrier band part in the serving cell 500, the downlink active carrier band part may not be changed.

In TDD mode, if the first uplink DCI format for the serving cell 500 is detected in the control resource set in the downlink default carrier band part in the serving cell 500, the downlink active carrier band part may not be changed.

When the second downlink DCI format for serving cell 500 is detected in the control resource set in the downlink default carrier band part in serving cell 500, the resource allocation information included in the second downlink DCI format is, in the frequency domain, It may indicate to which set of resource blocks the PDSCH is mapped, among the resource blocks included in the downlink default carrier band part. The size of the resource allocation information field included in the second downlink DCI format may be given based at least on the number of resource blocks included in the downlink default carrier band part.

In FDD mode, if the second uplink DCI format for the serving cell 500 is detected in the control resource set in the downlink default carrier band part in the serving cell 500, the downlink active carrier band part may not be changed.

In TDD mode, if the second uplink DCI format for the serving cell 500 is detected in the control resource set in the downlink default carrier band part in the serving cell 500, the downlink active carrier band part may not be changed.

If the first downlink DCI format for serving cell 500 is detected in the control resource set in carrier band part 512 in serving cell 500, the The carrier band part 513 may be set to the downlink active carrier band part. The carrier band part 513 may be the carrier band part indicated by the CBP indication information field. The resource allocation information field included in the first downlink DCI format may indicate which resource block set of resource blocks included in the carrier band part 513 in the frequency domain to which the PDSCH is mapped. good. The size of the resource allocation information field included in the first downlink DCI format may be given based at least on the number of resource blocks included in the carrier band part 513 in the frequency domain. The size of the resource allocation information field may be set to the maximum calculated value of the size of the resource allocation information field for each of one or more downlink carrier band parts in a serving cell. The size of the resource allocation information field may be configured in the frequency domain based on the maximum number of RBGs included in each of one or more downlink carrier band parts in the certain serving cell. That is, N _{RBG_CBP} for calculating the size of the resource allocation information field is the maximum number of RBGs included in each of one or more downlink carrier band parts configured in the serving cell in the frequency domain. There may be. The size of the resource allocation information field may be set based on the maximum number of resource blocks included in each of one or more downlink carrier band parts configured in the serving cell in the frequency domain. That is, N _{RB_CBP} for calculating the size of the resource allocation information field is the maximum number of resource blocks included in each of one or more downlink carrier band parts configured in the serving cell in the frequency domain. may be RBG size N _RBGs may be configured for each of one or more downlink carrier band parts. The size of the resource allocation information field included in the first downlink DCI format may be given at least based on dedicated RRC signaling.

In FDD mode, if the first uplink DCI format for serving cell 500 is detected in the control resource set in carrier band part 512 in serving cell 500, the downlink active carrier band part may not be changed.

In TDD mode, if the first uplink DCI format for serving cell 500 is detected in the control resource set in carrier band part 512 in serving cell 500, the downlink active carrier band part may not be changed.

If a second downlink DCI format for serving cell 500 is detected in the control resource set in carrier band part 512 in serving cell 500, the downlink default carrier band part may be set to the downlink active carrier band part. A resource allocation information field included in the second downlink DCI format may indicate to which set of resource blocks the PDSCH is mapped among resource blocks included in the downlink default carrier band part. . The size of the resource allocation information field included in the second downlink DCI format may be given based on at least the number of RBGs included in the downlink default carrier band part. The size of the resource allocation information field included in the second downlink DCI format may be given based at least on the number of resource blocks included in the downlink default carrier band part.

In FDD mode, if a second uplink DCI format for serving cell 500 is detected in the control resource set in carrier band part 512 in serving cell 500, the downlink active carrier band part may not be changed.

In TDD mode, if a second uplink DCI format for serving cell 500 is detected in the control resource set in carrier band part 512 in serving cell 500, the downlink active carrier band part may not be changed.

The number of resource blocks included in the downlink default carrier band part may be given based at least on the subcarrier spacing between PDCCH and PDSCH in the downlink default carrier band part and the bandwidth of the downlink default carrier band part. . The subcarrier spacing of the PDCCH and PDSCH in the downlink default carrier band part may be given based at least on the subcarrier spacing setting μ for the downlink default carrier band part. The bandwidth of the downlink default carrier band part is part or all of the frequency/center frequency of the downlink default carrier band part, the band to which the downlink default carrier band part belongs, common RRC signaling, and dedicated RRC signaling. may be given based on at least

The number of resource blocks included in the downlink default carrier band part is the same as the subcarrier spacing between PDCCH and PDSCH in the downlink initial activation carrier band part and the bandwidth of the downlink initial activation carrier band part. good too. The subcarrier spacing between PDCCH and PDSCH in the downlink default carrier band part may be the same as the subcarrier spacing setting μ for the downlink initial activation carrier band part. The bandwidth of the downlink default carrier band part is the frequency/center frequency of the downlink initial activation carrier band part, the band to which the downlink initial activation carrier band part belongs, common RRC signaling, and part of dedicated RRC signaling; Or it may be given based on at least all.

The resource allocation information field may identify resource blocks included in a carrier band-part based at least on a resource offset value N _{offset_CBP} associated with the carrier band-part. A resource offset value N _{offset_CBP} associated with a carrier band part indicates that a point offset from a resource block index reference point by a resource offset value N _{offset_CBP} is set as a resource block index reference point for the carrier band part. .

The resource block index reference point may be equal to the resource block index reference point for the downlink initial activation carrier band part. That is, the resource offset value N _{offset_CBP} associated with the downlink initial activation carrier band part may be zero. A resource offset value N _{offset_CBP} associated with the first downlink carrier band part may be provided based at least on the first system information. A resource offset value N _{offset_CBP} associated with the downlink default carrier band part may be given based at least on dedicated RRC signaling. A resource offset value N _{offset_CBP} associated with the second downlink carrier band part may be provided based at least on dedicated RRC signaling.

FIG. 9 is a diagram illustrating an example of a resource block allocation method according to an aspect of the present embodiment. In FIG. 9, it is assumed that the resource block mapping pattern to which the PDSCH is mapped, indicated by the resource allocation information field, is given as shown in FIG. 9(a). Also assume that the resource offset value N _{offset_CBP} associated with carrier band part #0 (CBP#0) is zero. Also assume that the resource offset value N _{offset_CBP} associated with carrier band part #1 (CBP#1) is ten. Also assume that the resource offset value N _{offset_CBP} associated with carrier band part #2 (CBP#2) is five. Also, the reference point for the resource block index is resource block #0.

In FIG. 9, the PDSCH is mapped to resource blocks indicated by diagonal lines. Also, resource blocks indicated by grid lines are reference points for resource block indices associated with respective carrier band parts. Since the resource offset value N _{offset_CBP} associated with carrier band part #0 is 0, it is mapped to PDSCH resource block indices #2, #3, #6, #7, #8 and #9. Since the resource offset value N _{offset_CBP} associated with carrier band part #1 is 10, it is mapped to PDSCH resource block indices #12, #13, #16, #17, #18 and #19. Since the resource offset value N _{offset_CBP} associated with carrier band part #2 is 5, it is mapped to PDSCH resource block indices #7, #8, #11, #12, #13 and #14.

That is, the set of resource blocks to which the PDSCH is mapped, indicated by the Resource Allocation Information field, may be given based on at least the value of the Resource Allocation Information field and the resource offset value N _{offset_CBP} associated with the carrier band part. Here, the carrier band-part may be the carrier band-part to which the PDSCH is mapped. The set of resource blocks to which the PDSCH is mapped indicated by the resource allocation information field is given based on at least the value of the resource allocation information field and a resource offset value N _{offset_CBP} associated with the carrier band part to which the PDSCH is mapped. good too.

A resource offset value N offset_CBP_1 associated with a downlink carrier band part when detecting a first DCI format for the serving cell 500 and a resource offset value N _{offset_CBP_1} associated with the downlink carrier band part when detecting a second DCI format for the serving cell 500. The resource offset value N _{offset_CBP_2} to be used may be different. The resource offset value N _{offset_CBP_1} and the resource offset value N _{offset_CBP_2} may each be provided at least based on dedicated RRC signaling.

A configuration example of the terminal device 1 according to one aspect of the present embodiment will be described below.

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

The upper layer processing unit 14 outputs uplink data (transport blocks) generated by user's operation or the like to the radio transmitting/receiving unit 10 . The upper layer processing unit 14 processes a MAC layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and an RRC layer.

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

A radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs RRC layer processing. The radio resource control layer processing unit 16 manages various setting information/parameters of its own device. The radio resource control layer processing unit 16 sets various setting information/parameters based on the upper layer signal received from the base station device 3 . That is, the radio resource control layer processing unit 16 sets various setting information/parameters based on the information indicating the various setting information/parameters received from the base station device 3 . The parameters may be higher layer parameters.

The radio transmission/reception unit 10 performs physical layer processing such as modulation, demodulation, encoding, and decoding. The radio transmission/reception unit 10 separates, demodulates, and decodes the received physical signal, and outputs the decoded information to the upper layer processing unit 14 . The radio transmitting/receiving unit 10 modulates, encodes, and generates a baseband signal (converts to a time-continuous signal) of data to generate a physical signal, and transmits the physical signal to the base station apparatus 3 .

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

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

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

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

A configuration example of the base station apparatus 3 according to one aspect of the present embodiment will be described below.

FIG. 11 is a schematic block diagram showing the configuration of the base station device 3 according to one aspect of the present embodiment. As illustrated, the base station device 3 includes a radio transmission/reception section 30 and an upper layer processing section 34 . The radio transmitting/receiving section 30 includes an antenna section 31 , an RF section 32 and a baseband section 33 . The upper layer processing unit 34 includes a medium access control layer processing unit 35 and a radio resource control layer processing unit 36 . The radio transmitting/receiving unit 30 is also called a transmitting unit, a receiving unit, or a physical layer processing unit.

The upper layer processing unit 34 processes the MAC layer, PDCP layer, RLC layer, and RRC layer.

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

A radio resource control layer processing unit 36 included in the upper layer processing unit 34 performs RRC layer processing. The radio resource control layer processing unit 36 generates downlink data (transport blocks), system information, RRC messages, MAC CE, etc. arranged in the PDSCH, or acquires them from upper nodes, and outputs them to the radio transmitting/receiving unit 30. . Also, the radio resource control layer processing unit 36 manages various setting information/parameters of each terminal device 1 . The radio resource control layer processing unit 36 may set various setting information/parameters for each terminal device 1 via an upper layer signal. That is, the radio resource control layer processing unit 36 transmits/notifies information indicating various setting information/parameters.

Since the functions of the radio transmission/reception unit 30 are the same as those of the radio transmission/reception unit 10, description thereof will be omitted.

Each of the units denoted by reference numerals 10 to 16 provided in the terminal device 1 may be configured as a circuit. Each of the units denoted by reference numerals 30 to 36 provided in the base station device 3 may be configured as a circuit.

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

(1) In order to achieve the above objects, the aspects of the present invention take the following measures. That is, a first aspect of the present invention is a terminal device, comprising a receiving unit that receives a DCI format that includes at least a resource allocation information field and receives a PDSCH based on the resource allocation information field, the resource allocation information field indicates which set of resource blocks the PDSCH is mapped to among resource blocks included in carrier band parts in the frequency domain, and the DCI format specifies that the PDSCH is scheduled among a plurality of carrier band parts. is the first DCI format including a CBP indication information field indicating the carrier band part to be assigned, the resource allocation information field is the number of resource blocks included in the carrier band part indicated by the CBP indication information field in the frequency domain. If the DCI format indicates a set of resource blocks to which the PDSCH is mapped, and the DCI format is a second DCI format that does not include the CBP indication information field, the resource allocation information field is included in the default carrier band part. PDSCH indicates a set of resource blocks to which the PDSCH is mapped.

(2) In addition, in the first aspect of the present invention, at least part of the fields included in the first DCI format are set based on at least the first dedicated RRC signaling and included in the second DCI format field is set regardless of the first dedicated RRC signaling.

(3) In addition, in the first aspect of the present invention, when receiving a second dedicated RRC signaling including information regarding setting of the default carrier band part, the default carrier band part is set to the second dedicated RRC signaling and if the second dedicated RRC signaling is not received, an initial activation carrier band part is set to the default carrier band part, and the initial activation carrier band part is used for scheduling first system information. It is used at least to monitor the PDCCH received.

(4) Also, in the first aspect of the present invention, when the DCI format is the first DCI format, the size of the resource allocation information field is set for each of the plurality of carrier band parts. If the DCI format is the second DCI format, the size of the resource allocation information field corresponds to the number of RBGs configured for the default carrier band part. do.

(5) A second aspect of the present invention is a base station apparatus comprising a DCI format including at least a resource allocation information field and a transmission unit that transmits a PDSCH corresponding to the DCI format, The information field indicates to which set of resource blocks the PDSCH is mapped among the resource blocks included in the carrier band parts in the frequency domain, and the DCI format indicates that the PDSCH is mapped among a plurality of carrier band parts. If the first DCI format includes a CBP indication information field indicating a carrier band part to be scheduled, the resource allocation information field is the resource blocks included in the carrier band part indicated by the CBP indication information field in the frequency domain. If the DCI format indicates a set of resource blocks to which the PDSCH is mapped, and the DCI format is a second DCI format that does not include the CBP indication information field, the resource allocation information field is in the default carrier band part. Figure 3 shows the set of resource blocks to which the PDSCH is mapped among the included resource blocks.

(6) In addition, in the second aspect of the present invention, at least part of the fields included in the first DCI format are configured at least based on the first dedicated RRC signaling and included in the second DCI format. field is set regardless of the first dedicated RRC signaling.

(7) Also, in the second aspect of the present invention, when the DCI format is the first DCI format, the size of the resource allocation information field is set for each of the plurality of carrier band parts. If the DCI format is the second DCI format, the size of the resource allocation information field corresponds to the number of RBGs configured for the default carrier band part. do.

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

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

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

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

Also, the base station device 3 in the above-described embodiment can be realized as an aggregate (device group) composed of a plurality of devices. Each of the devices constituting the device group may include a part or all of each function or each functional block of the base station device 3 related to the above-described embodiments. A device group may have a series of functions or functional blocks of the base station device 3 . Also, the terminal device 1 according to the above-described embodiments can communicate with a base station device as a group.

Also, the base station apparatus 3 in the above-described embodiments may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and/or NG-RAN (NextGen RAN, NR RAN). Also, the base station device 3 in the above-described embodiment may have some or all of the functions of an upper node for eNodeB and/or gNB.

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

In addition, in the above-described embodiments, a terminal device was described as an example of a communication device, but the present invention is not limited to this. For example, it can be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning/washing equipment, air conditioning equipment, office equipment, vending machines, and other household equipment.

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

1 (1A, 1B, 1C) terminal device 3 base station devices 10, 30 radio transmitting/receiving units 11, 31 antenna units 12, 32 RF units 13, 33 baseband units 14, 34 upper layer processing units 15, 35 medium access control layer Processing units 16, 36 Radio resource control layer processing unit 500 Serving cells 511, 512, 513 Carrier band parts 501, 502, 503, 504, 505, 506 Resource block indexes 521, 523, 525, 527 PDCCH
522, 524, 526 PDSCHs
531, 532 Timer

Claims (4)

A terminal device that communicates with a base station device in a serving cell,
An RRC layer processing unit and a receiving unit,
The RRC layer processing unit sets a downlink BWP (BandWidth Part) given by first system information in the serving cell, the downlink BWP is set to an active downlink BWP,
The RRC layer processing unit further configures a control resource set provided based on the MIB in the serving cell,
The receiving unit monitors a first PDCCH with a first DCI format and monitors a second PDCCH with a second DCI format in the active downlink BWP;
The receiving unit calculates a first bit size of a first resource allocation field for PDSCH in the first DCI format based on the number of resource blocks specifying a frequency band for the active downlink BWP. and
calculating a second bit size of a second resource allocation field for the PDSCH in the second DCI format based on the number of resource blocks specifying a frequency band for the control resource set;
The receiving unit monitors a PDCCH used for scheduling the first system information in the control resource set,
Terminal equipment. A base station device that communicates with a terminal device in a serving cell,
An RRC layer processing unit and a transmitting unit,
The RRC layer processing unit sets a downlink BWP (BandWidth Part) given by first system information in the serving cell, the downlink BWP is set to an active downlink BWP,
The RRC layer processing unit further configures a control resource set provided based on the MIB in the serving cell,
The transmitting unit transmits a first PDCCH with a first DCI format and a second PDCCH with a second DCI format in the active downlink BWP,
The transmitting unit calculates a first bit size of a first resource allocation field for PDSCH in the first DCI format based on the number of resource blocks specifying a frequency band for the active downlink BWP. and
calculating a second bit size of a second resource allocation field for the PDSCH in the second DCI format based on the number of resource blocks specifying a frequency band for the control resource set;
The transmitting unit transmits a PDCCH used for scheduling the first system information in the control resource set,
Base station equipment. A communication method for a terminal device that communicates with a base station device in a serving cell,
setting a downlink BWP (BandWidth Part) given by first system information in the serving cell, the downlink BWP being set to an active downlink BWP;
configure, in the serving cell, a control resource set that is granted based on the MIB;
monitoring a first PDCCH with a first DCI format and monitoring a second PDCCH with a second DCI format in the active downlink BWP;
calculating a first bit size of a first resource allocation field for a PDSCH in the first DCI format based on a number of resource blocks specifying a frequency band for the active downlink BWP;
calculating a second bit size of a second resource allocation field for the PDSCH in the second DCI format based on the number of resource blocks specifying a frequency band for the control resource set;
monitoring a PDCCH used for scheduling the first system information in the control resource set;
Communication method. A communication method for a base station device that communicates with a terminal device in a serving cell,
setting a downlink BWP (BandWidth Part) given by first system information in the serving cell, the downlink BWP being set to an active downlink BWP;
configure, in the serving cell, a control resource set that is granted based on the MIB;
transmitting a first PDCCH with a first DCI format and transmitting a second PDCCH with a second DCI format in the active downlink BWP;
calculating a first bit size of a first resource allocation field for a PDSCH in the first DCI format based on a number of resource blocks specifying a frequency band for the active downlink BWP;
calculating a second bit size of a second resource allocation field for the PDSCH in the second DCI format based on the number of resource blocks specifying a frequency band for the control resource set;
Transmitting a PDCCH used for scheduling the first system information on the control resource set;
Communication method.

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