WO2020090367A1 - Terminal device, base station device, and communication method - Google Patents

Abstract

The present invention is capable of performing communication efficiently. In the present invention, from among a plurality of monitoring occasions of search area sets, a reference monitoring occasion of the search area set is selected. From among the plurality of monitoring occasions of search area sets, one or more monitoring occasions included in a monitoring occasion group are selected. The monitoring occasion group includes the reference monitoring occasion, and one or more monitoring occasions overlapping with the reference monitoring occasion. From among control resource sets corresponding to one or more search area sets corresponding to the one or more monitoring occasions included in the monitoring occasion group, selection, based on priority, of one or more control resource sets is performed. The PDCCH is monitored in one or more monitoring occasions of the one or more search area sets corresponding to the selected one or more control resource sets in a certain duration. The reference monitoring occasion is selected on the basis of a start time (start position) of the monitoring occasion.

Description

Terminal device, base station device, and communication method

The present invention relates to a terminal device, a base station device, and a communication method. The present application claims priority based on Japanese Patent Application No. 2018-205081 filed in Japan on October 31, 2018, the contents of which are incorporated herein by reference.

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

In 3GPP, the next-generation standard (NR: New Radio) is examined to propose to IMT (International Mobile Telecommunication) -2020, which is a standard of the next-generation mobile communication system established 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.

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

(1) A first aspect of the present invention is a terminal device, which comprises an upper layer processing unit that sets a plurality of search area sets based on parameters of an upper layer, and a plurality of search area sets in a certain period. A receiver that monitors the PDCCH at one or more search area set monitoring opportunities among the monitoring opportunities, and selects a search area set reference monitoring opportunity from among the plurality of search area set monitoring opportunities; Of the monitoring opportunities of the plurality of search area sets, one or more monitoring opportunities included in a monitoring opportunity group are selected, and the monitoring opportunity group has one of the reference monitoring opportunity and one overlapping with the reference monitoring opportunity. Or a plurality of monitoring opportunities, and a control resource corresponding to one or more search area sets corresponding to the one or more monitoring opportunities included in the monitoring opportunity group. Selection of one or more control resource sets based on priority among the resource set, and one or more search area sets corresponding to the selected one or more control resource sets in the certain period. The PDCCH is monitored in one or more monitoring occasions and the selection of the reference monitoring opportunities is based on the start time (start position) of the monitoring opportunity, the end time of the monitoring opportunity (end position), or the priority. Done.

(2) A second aspect of the present invention is a base station apparatus, which comprises an upper layer processing unit that sets a plurality of search area sets based on parameters of an upper layer, and the plurality of search area sets in a certain period. Of the monitoring opportunities of one or a plurality of search area sets, and a transmitting unit that transmits the PDCCH at the monitoring opportunity of a plurality of search area sets, and selects a reference monitoring opportunity of the search area set from among the monitoring opportunities of the plurality of search area sets. , One or more monitoring opportunities included in a monitoring opportunity group are selected from the monitoring opportunities of the plurality of search area sets, and the monitoring opportunity group overlaps with the reference monitoring opportunity and the reference monitoring opportunity. A control resource that includes one or more monitoring opportunities and that corresponds to one or more search area sets corresponding to the one or more monitoring opportunities included in the monitoring opportunity group. Selection of one or more control resource sets based on priority among the resource set, and one or more search area sets corresponding to the selected one or more control resource sets in the certain period. The PDCCH is transmitted in one or more monitoring occasions, and the reference monitoring opportunity is selected based on the start time (start position) of the monitoring opportunity, the end time (end position) of the monitoring opportunity, or the priority. Done.

(3) A third aspect of the present invention is a communication method used in a terminal device, comprising the step of setting a plurality of search area sets based on parameters of an upper layer, and the plurality of search areas in a certain period. Monitoring PDCCH at one or more search area set monitoring opportunities of the set monitoring opportunities, and selecting a search area set reference monitoring opportunity from among the plurality of search area set monitoring opportunities. , One or more monitoring opportunities included in a monitoring opportunity group are selected from the monitoring opportunities of the plurality of search area sets, and the monitoring opportunity group overlaps with the reference monitoring opportunity and the reference monitoring opportunity. One or more search area sets that include one or more monitoring opportunities and that correspond to the one or more monitoring opportunities included in the monitoring opportunity group. One or more control resource sets based on priority are selected from among the control resource sets corresponding to, and one or more corresponding to the selected one or more control resource sets in the certain period. The PDCCH is monitored in one or more monitoring opportunities of the search area set of, and the selection of the reference monitoring opportunity is performed by selecting a start time (start position) of the monitoring opportunity, an end time (end position) of the monitoring opportunity, or It is done based on priority.

(4) A fourth aspect of the present invention is a communication method used in a base station apparatus, comprising the steps of setting a plurality of search area sets based on parameters of an upper layer, and the plurality of searches in a certain period. Transmitting a PDCCH in one or more search area set monitoring opportunities of the area set monitoring opportunities, and selecting a search area set reference monitoring opportunity from among the plurality of search area set monitoring opportunities However, one or more monitoring opportunities included in the monitoring opportunity group are selected from the monitoring opportunities of the plurality of search area sets, and the monitoring opportunity group overlaps with the reference monitoring opportunity and the reference monitoring opportunity. One or more search area sets including one or more monitoring opportunities and corresponding to the one or more monitoring opportunities included in the monitoring opportunity group. One or more control resource sets based on priority are selected from among the control resource sets corresponding to, and one or more corresponding to the selected one or more control resource sets in the certain period. The PDCCH is transmitted in one or more monitoring opportunities of the search area set of the above, and the selection of the reference monitoring opportunity is performed by selecting the start time (start position) of the monitoring opportunity, the end time (end position) of the monitoring opportunity, or the It is done based on priority.

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

It is a conceptual diagram of the radio | wireless communications system which concerns on 1 aspect of this embodiment. 6 is an example showing a relationship between N ^slot _symb , subcarrier interval setting μ, and CP setting according to an aspect of the present embodiment. It is a schematic diagram showing an example of a resource grid in a subframe concerning one mode of this embodiment. An example of a relationship between the length ^N _{PUCCH symb} of PUCCH format and PUCCH format according to one embodiment of the present embodiment; FIG. It is a figure which shows an example of the monitoring opportunity of a search area | set which concerns on 1 aspect of this embodiment. It is a schematic block diagram which shows the structure of the terminal device 1 which concerns on the one aspect | mode of this embodiment. It is a schematic block diagram which shows the structure of the base station apparatus 3 which concerns on the one aspect | mode of this embodiment. It is a figure which shows the example of setting of the monitoring opportunity of a search area | set which concerns on 1 aspect of this embodiment. It is a figure which shows the example of the pseudo code which shows the method of determining the reference monitoring opportunity of the monitoring opportunity of a search area set set in a certain period.

An embodiment of the present invention will be described below.

“A and / or B” may be terms that include “A”, “B”, or “A and B”.

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

The base station device 3 may be configured to include one or both of an MCG (Master Cell Group) and an SCG (Secondary Cell Group). The MCG is a group of serving cells configured to include at least a PCell (Primary Cell). The SCG is a group of serving cells configured to include at least PSCell (Primary Secondary Cell). The PCell may be a serving cell provided based on the initial connection. The MCG may be configured to include one or more SCells (Secondary Cells). The SCG may be configured to include one or more SCells. PCell is also called a primary cell. PSCell is also called a primary secondary cell. SCell is also called a secondary cell.

The MCG may be composed of a serving cell on EUTRA. The SCG may be composed of a serving cell on the next-generation standard (NR: New Radio).

The frame structure is explained below.

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

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

The subcarrier spacing (SCS) may be given by the subcarrier spacing Δf = 2 ^μ · 15 kHz. For example, the subcarrier spacing configuration μ may be set to any of 0, 1, 2, 3, 4, and / or 5. For a certain BWP (Band Width Part), the subcarrier spacing setting μ may be given by a higher layer parameter.

In the wireless communication system according to the aspect of the present embodiment, a time unit (time unit) T _c is used for expressing the length of the time domain. The time unit T _c may be given by T _c = 1 / (Δf _max · N _f ). Δf _max may be the maximum value of the subcarrier spacing supported in the wireless communication system according to the aspect of the present embodiment. Δf _max may be Δf _max = 480 kHz. N _f may be N _f = 4096. The constant κ is κ = Δf _max · N _f / (Δf _ref N _{f, ref} ) = 64. Δf _ref may be 15 kHz. N _{f, ref} may be 2048.

The constant κ may be a value indicating the relationship between the reference subcarrier interval and T _c . The constant κ may be used for the subframe length. The number of slots included in the subframe may be given based at least on the constant κ. Δf _ref is a reference subcarrier interval, and N _{f, ref} is a value corresponding to the reference subcarrier interval.

-Transmission of signals in the downlink and / or transmission of signals in the uplink are composed of 10 ms frames. The frame is configured to include 10 subframes. The subframe length is 1 ms. The frame length may be given regardless of the subcarrier spacing Δf. That is, the frame setting may be given regardless of μ. The length of the subframe may be given regardless of the subcarrier spacing Δf. That is, the subframe setting may be given regardless of μ.

For a certain setting μ of subcarrier spacing, the number and the index of slots included in a subframe may be given. For example, the slot numbers n ^μ _s may be given in ascending order in the range of 0 to N ^{subframe, μ} _slot −1 in the ^subframe . For the setting μ of the subcarrier spacing, the number of slots included in the frame and the index may be given. Further, the slot numbers n ^μ _{s, f} may be given in ascending order within the range of 0 to N ^{frame, μ} _slot −1 in the ^frame . Consecutive N ^slot _symb OFDM symbols may be included in one slot. N ^slot _symb may be given based at least and / or based on part or all of CP (Cyclic Prefix) setting. The CP settings may be given based at least on higher layer parameters. CP settings may be provided based at least on dedicated RRC signaling. The slot number is also called a slot index.

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

The physical resources are explained below.

An antenna port is defined by the fact that the channel on which symbols are transmitted on one antenna port can be estimated from the channel on which other symbols are transmitted on the same antenna port. If the large scale property of the channel where the symbols are transmitted at one antenna port can be estimated from the channel where the symbols are transmitted at the other antenna port, the two antenna ports are QCL (Quasi Co-Located). ) Is called. The large-scale characteristic may include at least a long-term characteristic of the channel. Large-scale characteristics include delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (Doppler shift), average gain (average gain), average delay (average delay), and beam parameters (spatial Rx parameters). Part or all may be included at least. That the first antenna port and the second antenna port are QCL with respect to the beam parameters means that the receiving beam assumed by the receiving side for the first antenna port and the receiving beam assumed by the receiving side for the second antenna port. And may be the same. The first antenna port and the second antenna port being QCL with respect to the beam parameter means that the transmission beam assumed by the reception side for the first antenna port and the transmission beam assumed by the reception side for the second antenna port. And may be the same. In the terminal device 1, when the large-scale characteristic of the channel in which the symbol is transmitted in one antenna port can be estimated from the channel in which the symbol is transmitted in the other antenna port, it is assumed that the two antenna ports are QCL. May be done. The fact that the two antenna ports are QCL may mean that the two antenna ports are assumed to be QCL.

A resource grid defined by N ^{size, μ} _{grid, x} N ^RB _sc subcarriers and N ^{subframe, μ} _symb OFDM symbols is provided for setting the subcarrier spacing and setting the carriers. N ^{size, μ} _{grid, x} may indicate the number of resource blocks provided for setting μ of the subcarrier spacing for carrier x. N ^{size, μ} _{grid, x} may indicate the bandwidth of the carrier. N ^{size, μ} _{grid, x} may correspond to the value of the upper layer parameter CarrierBandwidth. Carrier x may indicate either a downlink carrier or an uplink carrier. That is, x may be either “DL” or “UL”. N ^RB _sc may indicate the number of subcarriers included in one resource block. N ^RB _sc may be 12. At least 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 downlink (DL: DownLink) and uplink (UL: UpLink). Hereinafter, the set of parameters including at least part or all of the antenna port p, the subcarrier spacing setting μ, and the setting of the transmission direction is also referred to as a first wireless parameter set. That is, one resource grid may be provided for each first wireless parameter set.

In the downlink, the carrier included in the serving cell is called the downlink carrier (or downlink component carrier). In the uplink, a carrier included in the serving cell is called an uplink carrier (uplink component carrier). The downlink component carrier and the uplink component carrier are generically called a component carrier (or carrier).

The type of serving cell may be PCell, PSCell, or SCell. The PCell may be a serving cell identified based on at least the cell ID acquired from the SS / PBCH in the initial connection. The SCell may be a serving cell used in carrier aggregation. The SCell may be a serving cell provided at least based on dedicated RRC signaling.

Each element in the resource grid provided for each first radio parameter set is called a resource element. The resource element is specified by the frequency domain index k _sc and the time domain index l _sym . For a certain first radio parameter set, the resource element is specified by the frequency domain index k _sc and the time domain index l _sym . The resource element specified by the frequency domain index k _sc and the time domain index l _sym is also referred to as a resource element (k _sc , l _sym ). The frequency domain index k _sc 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 setting μ of the subcarrier spacing. N ^μ _RB may be N ^{size, μ} _{grid, x} . N ^RB _sc is the number of subcarriers included in the resource block, and N ^RB _sc = 12. The frequency domain index _ksc may correspond to the subcarrier index _ksc . The time domain index l _sym may correspond to the OFDM symbol index l _sym .

FIG. 3 is a schematic diagram showing an example of a resource grid in a subframe according to an aspect of the present embodiment. In the resource grid of FIG. 3, the horizontal axis is the time domain index l _sym , and the vertical axis is the frequency domain index k _sc . In one subframe, the frequency domain of the resource grid includes N ^μ _RB N ^RB _sc subcarriers. In one subframe, the time domain of the resource grid may include 14.2 ^μ OFDM symbols. One resource block is configured to include N ^RB _sc subcarriers. The time domain of the resource block may correspond to one OFDM symbol. The time domain of the resource block may correspond to 14 OFDM symbols. The time domain of the resource block may correspond to one or more slots. The time domain of the resource block may correspond to one subframe.

The terminal device 1 may be instructed to perform transmission / reception using only a subset of the resource grid. A subset of the resource grid is also referred to as BWP, which may be provided at least based on higher layer parameters and / or some or all of the DCI. BWP is also called a carrier band part (Carrier Bandwidth Part). The terminal device 1 may not be instructed to perform transmission / reception using all sets of the resource grid. The terminal device 1 may be instructed to perform transmission / reception using a part of frequency resources in the resource grid. One BWP may be composed of a plurality of resource blocks in the frequency domain. One BWP may be composed of a plurality of consecutive resource blocks in the frequency domain. The BWP set for the downlink carrier is also called the downlink BWP. The BWP set for the uplink carrier is also referred to as the uplink BWP. The BWP may be a subset of the carrier's band.

One or more downlink BWPs may be set for each serving cell. One or more uplink BWPs may be configured for each serving cell.

Among the one or more downlink BWPs set for the serving cell, one downlink BWP may be set as the active downlink BWP. The downlink BWP switch is used for deactivating one active downlink BWP and activating an inactive downlink BWP other than the one active downlink BWP. The downlink BWP switch may be controlled by the BWP field included in the downlink control information. The downlink BWP switch may be controlled based on upper layer parameters.

DL-SCH may be received in the active downlink BWP. The PDCCH may be monitored in the active downlink BWP. The PDSCH may be received in the active downlink BWP.

DL-SCH is not received in the inactive downlink BWP. The PDCCH is not monitored in the inactive downlink BWP. CSI for inactive downlink BWP is not reported.

Of one or more downlink BWPs set for the serving cell, two or more downlink BWPs may not be set as active downlink BWPs.

Among the one or more uplink BWPs set for the serving cell, one uplink BWP may be set as the active uplink BWP. The uplink BWP switch is used for deactivating one active uplink BWP and activating an inactive uplink BWP other than the one active uplink BWP. The uplink BWP switch may be controlled by the BWP field included in the downlink control information. The uplink BWP switch may be controlled based on upper layer parameters.

UL-SCH may be transmitted in the active uplink BWP. PUCCH may be transmitted in the active uplink BWP. The PRACH may be transmitted in the active uplink BWP. The SRS may be transmitted in the active uplink BWP.

UL-SCH is not transmitted in the inactive uplink BWP. PUCCH is not transmitted in the inactive uplink BWP. PRACH is not transmitted in the inactive uplink BWP. In the inactive uplink BWP, SRS is not transmitted.

Of one or more uplink BWPs set for the serving cell, two or more uplink BWPs may not be set as active uplink BWPs.

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

The upper layer signal may be common RRC signaling. The common RRC signaling may include at least some or all of the following features C1 to C3.
Feature C1) Feature of BCCH logical channel or feature C2 mapped to CCCH logical channel C2) Feature C3 including at least ReconfigurationWithSync information element Mapped to PBCH

The ReconfigurationWithSync information element may include information indicating the settings commonly used in the serving cell. The settings commonly used in the serving cells may include at least the PRACH settings. The PRACH setting may indicate at least one or a plurality of random access preamble indexes. The PRACH configuration may indicate at least PRACH time / frequency resources.

Common RRC signaling may include at least common RRC parameters. The common RRC parameter may be a parameter commonly used (cell-specific) in the serving cell.

The upper layer signal may be dedicated RRC signaling. The dedicated RRC signaling may include at least some or all of the following features D1 to D2.
Feature D1) Feature mapped to DCCH logical channel D2) Does not include ReconfigurationWithSync information element

For example, MIB (Master Information Block) and SIB (System Information Block) may be included in the common RRC signaling. Also, an upper layer message that is mapped to the DCCH logical channel and that includes at least the ReconfigurationWithSync information element may be included in the common RRC signaling. Also, a higher layer message that is mapped to the DCCH logical channel and does not include the ReconfigurationWithSync information element may be included in the dedicated RRC signaling.

-The SIB may indicate at least the time index of the SS (Synchronization Signal) block. The SS block (SS block) is also called an SS / PBCH block (SS / PBCH block). The SIB may include at least information related to PRACH resources. The SIB may include at least information related to initial connection setup.

The ReconfigurationWithSync information element may include at least information related to the PRACH resource. The ReconfigurationWithSync information element may include at least information related to the setting of the initial connection.

The dedicated RRC signaling may include at least a dedicated RRC parameter. The dedicated RRC parameter may be a (UE-specific) parameter used exclusively for the terminal device 1. The dedicated RRC signaling may include at least common RRC parameters.

-Common RRC parameters and dedicated RRC parameters are also called upper layer parameters.

The physical channels and physical signals according to various aspects of this embodiment will be described below.

The uplink physical channel may correspond to a set of resource elements that carry information occurring in higher layers. The uplink physical channel is a physical channel used in an uplink carrier. In the wireless communication system according to one 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). Uplink control information includes channel state information (CSI: ChannelStateInformation), scheduling request (SR: SchedulingRequest), transport block (TB: Transport block, MAC PDU: MediumAccess Control Protocol Protocol DataUnit, DL-SCH: Downlink -Includes part or all of HARQ-ACK (Hybrid Automatic Repeat request ACK knowledge) information corresponding to Shared Channel, PDSCH: Physical Downlink Shared Channel).

Uplink control information may be multiplexed on PUCCH. The multiplexed PUCCH may be transmitted.

HARQ-ACK information may include at least a HARQ-ACK bit corresponding to a transport block. The HARQ-ACK bit may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to the transport block. The ACK may be a value indicating that the transport block has been successfully decoded. NACK may be a value indicating that decoding of the transport block has not completed successfully. The HARQ-ACK information may include at least one HARQ-ACK codebook including one or more HARQ-ACK bits. The HARQ-ACK bit corresponding to one or a plurality of transport blocks may be that the HARQ-ACK bit corresponds to a PDSCH including the one or a plurality of transport blocks.

HARQ-ACK bit may indicate ACK or NACK corresponding to one CBG (Code Block Group) included in the transport block. HARQ-ACK information is also referred to as HARQ-ACK, HARQ feedback, HARQ information, HARQ control information, and HARQ-ACK message.

A scheduling request (SR: Scheduling Request) may be used at least to request a PUSCH resource for initial transmission. The scheduling request bit may be used to indicate either a positive SR (positive SR) or a negative SR (negative SR). The fact that the scheduling request bit indicates a positive SR is also referred to as “a positive SR is transmitted”. A positive SR may indicate that the terminal device 1 requests PUSCH resources for initial transmission. A positive SR may indicate that the scheduling request is triggered by higher layers. The positive SR may be transmitted when instructed to transmit the scheduling request by the upper layer. The fact that the scheduling request bit indicates a negative SR is also referred to as “a negative SR is transmitted”. The negative SR may indicate that the PUSCH resource for initial transmission is not requested by the terminal device 1. A negative SR may indicate that the scheduling request is not triggered by higher layers. A negative SR may be sent if higher layers do not indicate to send a scheduling request.

The scheduling request bit may be used to indicate either a positive SR or a negative SR for one or more SR configurations. Each of the one or more SR settings may correspond to one or more logical channels. The positive SR for an SR setting may be the positive SR for any or all of the one or more logical channels corresponding to the SR setting. Negative SR may not correspond to a particular SR setting. Showing a negative SR may mean showing a negative SR for all SR settings.

SR setting may be a scheduling request ID (SchedulingRequestID). The scheduling request ID may be given by an upper layer parameter.

The channel state information may include at least part or all of the channel quality index (CQI: ChannelQualityIndicator), the precoder matrix index (PMI: PrecoderMatrixIndicator), and the rank index (RI: Rank Indicator). CQI is an index related to channel quality (for example, propagation strength), and PMI is an index indicating a precoder. The RI is an index indicating the transmission rank (or the number of transmission layers).

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

ㆍ Channel status information report is a report of channel status information. The channel state information report may include CSI part 1 and / or CSI part 2. The CSI part 1 may be configured to include at least part or all of wideband channel quality information (wideband CQI), wideband precoder matrix index (wideband PMI), and rank index. The number of bits of CSI part 1 multiplexed on PUCCH may be a predetermined value regardless of the value of the rank index of the channel state information report. The number of bits of CSI part 2 multiplexed on PUCCH may be given based on the value of the rank index of the channel state information report. The rank index of the channel state information report may be a value of the rank index used for calculating the channel state information report. The rank index of the channel status information may be a value indicated by the rank index field included in the channel status information report.

The set of rank indicators permitted in the channel status information report may be a part or all of 1 to 8. The set of rank indicators allowed in the channel state information report may be given based at least on the higher layer parameter RankRestriction. If the set of allowed rank indicators in the channel state information report contains only one value, the rank indicator in the channel state information report may be the one value.

Priority may be set for the channel status information report. The priority of the channel state information report is set regarding the time domain behavior of the channel state information report, the type of content of the channel state information report, the index of the channel state information report, and / or the channel state information report. It may be given based at least on some or all of the indices of the serving cells for which measurements are set.

The setting regarding the behavior of the time domain of the channel state information report is performed by the channel state information report being aperiodic, the channel state information report being semi-persistent, or , Quasi-static, or may be set.

The content type of the channel status information report may indicate whether or not the channel status information report includes RSRP (Reference Signals Received Power) of Layer 1.

-The index of the channel status information report may be given by the upper layer parameter.

PUCCH supports PUCCH format (PUCCH format 0 to PUCCH format 4). The PUCCH format may be transmitted on the PUCCH. Transmitting the PUCCH format may be transmitting the PUCCH.

FIG. 4 is a diagram illustrating an example of a relationship between a PUCCH format and a PUCCH format length N ^PUCCH _{symb according} to an aspect of the present embodiment. The length N ^PUCCH _symb of PUCCH format 0 is 1 or 2 OFDM symbols. The length N ^PUCCH _symb of PUCCH format 1 is any of 4 to 14 OFDM symbols. The length N ^PUCCH _symb of PUCCH format 2 is 1 or 2 OFDM symbols. The length N ^PUCCH _symb of PUCCH format 3 is any of 4 to 14 OFDM symbols. The length N ^PUCCH _symb of PUCCH format 4 is any of 4 to 14 OFDM symbols.

PUSCH is used at least for transmitting transport blocks (TB, MAC PDU, UL-SCH). PUSCH may be used to transmit at least some or all of transport blocks, HARQ-ACK information, channel state information, and scheduling requests. PUSCH is used at least for transmitting the random access message 3.

PRACH is used at least to transmit the random access preamble (random access message 1). PRACH is an initial connection establishment procedure, a handover procedure, a connection re-establishment procedure, synchronization for PUSCH transmission (timing adjustment), and a part or all of the resource request for PUSCH. May be used at least to indicate The random access preamble may be used to notify the base station device 3 of an index (random access preamble index) given by the upper layer of the terminal device 1.

The random access preamble may be given by cyclically shifting the Zadoff-Chu sequence corresponding to the physical root sequence index u. The 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 indexes of random access preambles may correspond to different combinations of physical root sequence index u and cyclic shift. The physical root sequence index u and the cyclic shift may be given based at least on the information included in the system information. The physical root sequence index u may be an index that identifies a sequence included in the random access preamble. The 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. The uplink physical signal is used by the physical layer, although it may not be used to transmit the information output from higher layers.
・ UL DMRS (UpLink Demodulation Reference Signal)
・ SRS (Sounding Reference Signal)
・ UL PTRS (UpLink Phase Tracking Reference Signal)

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

SRS may not be related to the transmission of PUSCH or PUCCH. The base station device 3 may use SRS for measuring the channel state. The SRS may be transmitted at the end of the subframe in the uplink slot, or at a predetermined number of OFDM symbols from the end.

UL PTRS may be a reference signal used at least for phase tracking. The UL PTRS may be associated with a UL DMRS group that includes at least the antenna ports used for one or more UL DMRSs. The relationship between the UL PTRS and the UL DMRS group may be that some or all of the antenna ports of the UL PTRS and the antenna ports included in the UL DMRS group are at least QCL. The UL DMRS group may be identified based on at least the antenna port with the smallest index in the UL DMRS included in the UL DMRS group. UL PTRS may be mapped to the antenna port with the smallest index in one or more antenna ports to which one codeword is mapped. The UL PTRS may be mapped to the first layer when one codeword is at least mapped to the first layer and the second layer. UL PTRS may not be mapped to the second layer. The index of the antenna port to which the UL PTRS is mapped may be given based at least on the downlink control information.

In FIG. 1, the following downlink physical channels are used in downlink radio communication from the base station device 3 to the terminal device 1. The downlink physical channel is 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 at least for transmitting MIB and / or PBCH payload. The PBCH payload may include at least information indicating an index regarding the transmission timing of the SS block. The PBCH payload may include information related to the SS block identifier (index). The PBCH may be transmitted based on a predetermined transmission interval. PBCH may be transmitted at intervals of 80 ms. The PBCH may be transmitted at 160 ms intervals. The content of information included in the PBCH may be updated every 80 ms. Part or all of the information included in the PBCH may be updated every 160 ms. The PBCH may be composed of 288 subcarriers. The PBCH may be configured to include 2, 3, or 4 OFDM symbols. The MIB may include information related to the identifier (index) of the SS block. The MIB may include information indicating at least a part of the slot number, the subframe number, and / or the radio frame number in which the PBCH is transmitted.

The PDCCH may be used at least for transmitting downlink control information (DCI: Downlink Control Information). The PDCCH may be transmitted including at least downlink control information. The downlink control information is also called a DCI format. The downlink control information may indicate at least either a downlink grant (uplink grant) or an uplink grant (uplink grant). The DCI format used for PDSCH scheduling is also called a downlink DCI format. The DCI format used for PUSCH scheduling is also called an uplink DCI format. The downlink grant is also referred to as a downlink assignment or a downlink allocation. The uplink DCI format includes at least one or both of DCI format 0_0 and DCI format 0_1.

The DCI format 0_0 includes at least part or all of 1A to 1F.
1A) Identifier for DCI formats field
1B) Frequency domain resource assignment field
1C) Uplink Time domain resource assignment field
1D) Frequency hopping flag field
1E) MCS field (MCS field: Modulation and Coding Scheme field)
1F) First CSI request field

The DCI format specific field may be used at least to indicate whether the DCI format including the DCI format specific field corresponds to one or a plurality of DCI formats. The one or more DCI formats may be provided based on at least some or all of DCI format 1_0, DCI format 1_1, DCI format 0_0, and / or DCI format 0_1.

The frequency domain resource allocation field may be used at least to indicate frequency resource allocation for the PUSCH scheduled by the DCI format including the frequency domain resource allocation field.

The uplink time domain resource allocation field may be used at least to indicate the time resource allocation for the PUSCH scheduled by the DCI format including the uplink time domain resource allocation field.

The frequency hopping flag field may be used at least to indicate whether frequency hopping is applied to PUSCH scheduled by the DCI format including the frequency hopping flag field.

The MCS field may be used at least to indicate a modulation scheme for PUSCH scheduled by the DCI format including the MCS field and / or a part or all of the target coding rate. The target coding rate may be a target coding rate for a transport block of the PUSCH. The size of the transport block (TBS: Transport Block Size) may be given based at least on the target coding rate.

The first CSI request field is used at least to indicate the CSI report. The size of the first CSI request field may be a predetermined value. The size of the first CSI request field may be 0, 1, 1, 2 or 3.

The DCI format 0_1 is configured to include at least part or all of 2A to 2H.
2A) DCI format specific field 2B) Frequency domain resource allocation field 2C) Uplink time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS field 2F) Second CSI request field (Second CSI request field)
2G) BWP field
2H) UL DAI field (Up link Downlink Assignment Indicator field)

The BWP field may be used to indicate the uplink BWP to which the PUSCH scheduled by the DCI format 0_1 is mapped.

The second CSI request field is used at least to indicate the CSI report. The size of the second CSI request field may be given based at least on the upper layer parameter ReportTriggerSize.

The UL DAI field may be at least used for generating a codebook of HARQ-ACK information. V ^UL _DAI may be provided based at least on the value of the UL DAI field. V ^UL _DAI is also called UL DAI.

The downlink DCI format includes at least one or both of DCI format 1_0 and DCI format 1_1.

The DCI format 1_0 includes at least part or all of 3A to 3I.
3A) Identifier for DCI formats field
3B) Frequency domain resource assignment field
3C) Downlink Time domain resource assignment field
3D) Frequency hopping flag field
3E) MCS field (MCS field: Modulation and Coding Scheme field)
3F) First CSI request field
3G) PDSCH to HARQ feedback timing indicator field
3H) PUCCH resource indicator field
3I) Counter Downlink Assignment Indicator field

The downlink time domain resource allocation field may be used to indicate at least part or all of the OFDM symbol to which the timing K0, the DMRS mapping type, and PDSCH are mapped. When the index of the slot including the PDCCH is the slot n, the index of the slot including the PDSCH may be n + K0.

The PDSCH to HARQ feedback timing indication field may be a field indicating the timing K1. If the index of the slot including the last OFDM symbol of the PDSCH is slot n, the index of the slot including PUCCH or PUSCH including at least HARQ-ACK corresponding to the transport block included in the PDSCH is n + K1. Good. When the index of the slot including the last OFDM symbol of PDSCH is slot n, the first OFDM symbol of PUCCH or the first OFDM symbol of PUSCH including at least HARQ-ACK corresponding to the transport block included in PDSCH is The index of the included slot may be n + K1.

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

The counter DAI field may be used at least for generating a codebook of HARQ-ACK information. V ^DL _{C-DAI, c, m} may be given based at least on the value of the counter DAI field. V ^DL _{C-DAI, c, m} is also referred to as counter DAI.

The DCI format 1_1 includes at least part or all of 4A to 4K.
4A) DCI format specific field (Identifier for DCI formats field)
4B) Frequency domain resource assignment field
4C) Downlink time domain resource assignment field
4D) Frequency hopping flag field
4E) MCS field (Modulation and Coding Scheme field)
4F) First CSI request field
4G) PDSCH to HARQ feedback timing indicator field
4H) PUCCH resource indicator field
4J) BWP field
4K) DAI field (Downlink Assignment Indicator field)

The BWP field may be used to indicate the downlink BWP to which the PDSCH scheduled by the DCI format 1_1 is mapped.

The DAI field may be used at least for generating a codebook of HARQ-ACK information. V ^DL _{T-DAI, m} may be given based at least on the value of the DAI field. V ^DL _{C-DAI, c, m} may be given based at least on the value of the DAI field. V ^DL _{T-DAI, m} is also referred to as total DAI.

DCI format 2_0 may be used at least to indicate the slot format. The slot format may be information indicating the transmission direction (downlink, uplink, or XXX) for each of the OFDM symbols that form a certain slot. XXX may be indicating no transmission direction.

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

One physical channel may be mapped to one serving cell. One physical channel may be mapped to one carrier band part set for one carrier included in one serving cell.

Terminal device 1 is given one or more control resource sets (CORESET: COntrolREsourceSET). The terminal device 1 monitors the PDCCH in one or a plurality of control resource sets.

The control resource set may indicate a time frequency domain to which one or more PDCCHs may be mapped. The control resource set may be an area in which the terminal device 1 monitors the PDCCH. The control resource set may be composed of continuous resources (Localized resource). The control resource set may be composed of discontinuous resources.

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

The frequency domain of the control resource set may be given based on at least the upper layer signal and / or the downlink control information.

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

A certain control resource set may be a common control resource set. The common control resource set may be a control resource set commonly set for the plurality of terminal devices 1. The common control resource set may be provided based on at least some or all of the MIB, SIB, common RRC signaling, and cell ID. For example, the time resource and / or frequency resource of the control resource set configured to monitor the PDCCH used for scheduling the SIB may be provided based at least on the MIB.

A certain control resource set may be a dedicated control resource set (Dedicated control resource set). The dedicated control resource set may be a control resource set set to be exclusively used for the terminal device 1. The dedicated control resource set may be provided based at least on the dedicated RRC signaling.

The set of PDCCH candidates monitored by the terminal device 1 may be defined in terms of the search area. That is, the set of PDCCH candidates monitored by the terminal device 1 may be given by the search region.

The search area may be configured to include one or more PDCCH candidates at one or more aggregation levels. The aggregation level of PDCCH candidates may indicate the number of CCEs configuring the PDCCH.

The terminal device 1 may monitor at least one or a plurality of search areas in a slot in which DRX (Discontinuous reception) is not set. DRX may be provided based at least on higher layer parameters. The terminal device 1 may monitor at least one or a plurality of search area sets (Search space set) in a slot in which DRX is not set.

The search area set may be configured to include at least one or a plurality of search areas. The type of the search area set is a type 0 PDCCH common search area, a type 0a PDCCH common search area, a type 1 PDCCH common search area, a type 2 PDCCH common search area, a type 3 PDCCH common search area, and / or a UE dedicated PDCCH search. It may be any of the areas.

The type 0 PDCCH common search area, the type 0a PDCCH common search area, the type 1 PDCCH common search area, the type 2 PDCCH common search area, and the type 3 PDCCH common search area are also referred to as CSS (Common Search Space). The UE dedicated PDCCH search area is also referred to as USS (UE specific search space).

Each search area set may be associated with one control resource set. Each of the search area sets may be included at least in one control resource set. For each search area set, the index of the control resource set associated with the search area set may be provided.

-A monitoring interval (Monitoring period periodicity) of the search area set may be set for each of the search area sets. The search area set monitoring interval may indicate at least the slot interval at which the terminal device 1 monitors the search area set. The upper layer parameter indicating at least the monitoring interval of the search area set may be given for each search area set.

-A monitoring offset of the search area set may be set for each of the search area sets. The monitoring offset of the search area set may indicate at least the offset (offset) of the index of the slot in which the terminal apparatus 1 monitors the search area set from the reference index (for example, slot # 0). The upper layer parameter indicating at least the monitoring offset of the search area set may be given for each search area set.

-A monitoring pattern of the search area set may be set for each of the search area sets. The search pattern of the search area set may indicate the first OFDM symbol for the search area set in which the monitoring is performed. The monitoring pattern of the search area set may be given by a bitmap showing the leading OFDM symbol in one or more slots. The upper layer parameter that indicates at least the monitoring pattern of the search area set may be given for each search area set.

The monitoring opportunity of the search area set is provided based on at least some or all of the search interval of the search area set, the monitor offset of the search area set, the monitor pattern of the search area set, and / or the setting of DRX. May be.

FIG. 5 is a diagram illustrating an example of a search area set monitoring opportunity according to an aspect of the present embodiment. In FIG. 5, the search area set 91 and the search area set 92 are set in the primary cell 301, the search area set 93 is set in the secondary cell 302, and the search area set 94 is set in the secondary cell 303.

In FIG. 5, a block indicated by a grid line indicates a search region set 91, a block indicated by a diagonal line rising to the right indicates a search region set 92, a block indicated by a diagonal line rising to the left indicates a search region set 93, and a block indicated by a horizontal line. The block shown shows a search area set 94.

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

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

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

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

The type 0 PDCCH common search area may be used at least for a DCI format with a CRC (Cyclic Redundancy Check) sequence scrambled by SI-RNTI (System Information-Radio Network Temporary Identifier). The setting of the type 0 PDCCH common search area may be given based on at least 4 bits of the LSB (Least Significant Bits) of the upper layer parameter PDCCH-ConfigSIB1. The upper layer parameter PDCCH-ConfigSIB1 may be included in the MIB. The setting of the type 0 PDCCH common search area may be given based at least on the higher layer parameter SearchSpaceZero. The interpretation of the bits of the upper layer parameter SearchSpaceZero may be the same as the interpretation of the four bits of the LSB of the upper layer parameter PDCCH-ConfigSIB1. The setting of the type 0 PDCCH common search region may be given based on at least the upper layer parameter SearchSpace SIB1. The upper layer parameter SearchSpace SIB1 may be included in the upper layer parameter PDCCH-ConfigCommon. The PDCCH detected in the type 0 PDCCH common search region may be used at least for scheduling the PDSCH transmitted including the SIB1. SIB1 is a kind of SIB. SIB1 may include scheduling information of SIBs other than SIB1. The terminal device 1 may receive the upper layer parameter PDCCH-ConfigCommon in EUTRA. The terminal device 1 may receive the upper layer parameter PDCCH-ConfigCommon in the MCG.

The type 0a PDCCH common search area may be used at least for a DCI format with a CRC (Cyclic Redundancy Check) sequence scrambled by SI-RNTI (System Information-Radio Network Temporary Identifier). The setting of the type 0a PDCCH common search area may be given based at least on the upper layer parameter SearchSpaceOtherSystemInformation. The upper layer parameter SearchSpaceOtherSystemInformation may be included in SIB1. The upper layer parameter SearchSpaceOtherSystemInformation may be included in the upper layer parameter PDCCH-ConfigCommon. The PDCCH detected in the type 0 PDCCH common search area may be used at least for scheduling of PDSCH transmitted including SIBs other than SIB1.

The type 1 PDCCH common search area is accompanied by a CRC sequence scrambled by RA-RNTI (Random Access-Radio Network Temporary Identifier) and / or a CRC sequence scrambled by TC-RNTI (Temporary Network Temporary Identifier) It may be used at least for the DCI format. RA-RNTI may be provided based at least on the time / frequency resource of the random access preamble transmitted by the terminal device 1. The TC-RNTI may be provided by PDSCH (message 2 or also referred to as random access response) scheduled by the DCI format with the CRC sequence scrambled by RA-RNTI. The type 1 PDCCH common search area may be provided based at least on the parameter ra-SearchSpace of the upper layer. The upper layer parameter ra-SearchSpace may be included in SIB1. The upper layer parameter ra-SearchSpace may be included in the upper layer parameter PDCCH-ConfigCommon.

The type 2 PDCCH common search area may be used for a DCI format accompanied by a CRC sequence scrambled by P-RNTI (Paging-Radio Network Temporary Identifier). The P-RNTI may be used at least for transmission in the DCI format including the information notifying the change of the SIB. The type 2 PDCCH common search area may be provided based at least on the upper layer parameter PagingSearchSpace. The upper layer parameter PagingSearchSpace may be included in SIB1. The upper layer parameter PagingSearchSpace may be included in the upper layer parameter PDCCH-ConfigCommon.

The type 3 PDCCH common search area may be used for a DCI format with a CRC sequence scrambled by C-RNTI (Cell-Radio Network Temporary Identifier). The C-RNTI may be provided based at least on the PDSCH (message 4, also referred to as contention resolution) scheduled by the DCI format with the CRC sequence scrambled by the TC-RNTI. The type 3 PDCCH common search area may be a search area set given when the upper layer parameter SearchSpaceType is set to common.

The UE dedicated PDCCH search area may be used at least for the DCI format with the CRC sequence scrambled by the C-RNTI.

When the C-RNTI is given to the terminal device 1, the type-0 PDCCH common search area, the type-0a PDCCH common search area, the type-1 PDCCH common search area, and / or the type-2 PDCCH common search area are CRCs scrambled by the C-RNTI. It may be used at least for the DCI format with sequences.

When C-RNTI is given to the terminal device 1, the upper layer parameter PDCCH-ConfigSIB1, the upper layer parameter SearchSpaceZero, the upper layer parameter SearchSpaceSIB1, the upper layer parameter SearchSpaceOtherSystemInformation, the upper layer parameter upper layer, or the upper layer parameter ra-Sear. The search region set provided at least based on any of the parameters PagingSearchSpace may be used at least for the DCI format with the CRC sequence scrambled with the C-RNTI.

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.

Physical resources in the search area are composed of control channel components (CCE: Control Channel Element). The CCE is composed of 6 resource element groups (REG: Resource Element Group). The REG may be configured by one OFDM symbol of one PRB (Physical Resource Block). That is, the REG may be configured to include 12 resource elements (RE: Resource Element). The PRB is also simply referred to as an RB (Resource Block: resource block).

PDSCH is used at least for transmitting a transport block. The PDSCH may be used at least for transmitting the random access message 2 (random access response). The PDSCH may be used at least for transmitting system information including parameters used for initial access.

In FIG. 1, the following downlink physical signals are used in downlink wireless communication. The downlink physical signal is used by the physical layer, although it may not be used to transmit the information output from the upper layer.
・ Synchronization signal (SS)
・ DL DMRS (DownLink DeModulation Reference Signal)
・ CSI-RS (Channel State Information-Reference Signal)
・ DL PTRS (DownLink Phase Tracking Reference Signal)
・ TRS (Tracking Reference Signal)

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

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

DL DMRS relates to the transmission of PBCH, PDCCH, and / or PDSCH. DL DMRS is multiplexed on PBCH, PDCCH, and / or PDSCH. The terminal device 1 may use the PBCH, the PDCCH, or the DL DMRS corresponding to the PDSCH in order to correct the propagation path of the PBCH, the PDCCH, or the PDSCH. Hereinafter, the transmission of both the PBCH and the DL DMRS related to the PBCH is referred to as the transmission of the PBCH. Further, the transmission of both the PDCCH and the DL DMRS related to the PDCCH is simply called the transmission of the PDCCH. In addition, the transmission of both PDSCH and DL DMRS related to the PDSCH is called simply transmission of PDSCH. DL DMRS related to PBCH is also called DL DMRS for PBCH. The DL DMRS associated with the PDSCH is also called the DL DMRS for PDSCH. The DL DMRS associated with the PDCCH is also referred to as the DL DMRS associated with the PDCCH.

DL DMRS may be a reference signal individually set in the terminal device 1. The DL DMRS sequence may be given based at least on the parameters individually set in the terminal device 1. The DL DMRS sequence may be provided based at least on a UE-specific value (for example, C-RNTI, etc.). DL DMRS may be transmitted separately for PDCCH and / or PDSCH.

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

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

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

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

The downlink physical channel and downlink physical signal are also referred to as downlink signals. The uplink physical channel and the uplink physical signal are also referred to as uplink signals. The downlink signal and the uplink signal are also collectively called a physical signal. The downlink signal and the uplink signal are also collectively referred to as a signal. The downlink physical channel and the uplink physical channel are generically called a physical channel. The downlink physical signal and the uplink physical signal are collectively referred to as a physical signal.

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

The base station device 3 and the terminal device 1 exchange (transmit / receive) signals of the upper layer in the higher layer. For example, the base station device 3 and the terminal device 1 may transmit and receive RRC signaling (RRC message: Radio Resource C ontrol message, RRC information: Radio Resource Control information) in the radio resource control (RRC: Radio Resource Control) layer. Good. Further, the base station device 3 and the terminal device 1 may transmit and receive 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 for transmitting RRC signaling and / or MAC CE. Here, the RRC signaling transmitted from the base station device 3 on the PDSCH may be common signaling to the plurality of terminal devices 1 in the serving cell. Signaling common to the plurality of terminal devices 1 in the serving cell is also referred to as common RRC signaling. The RRC signaling transmitted from the base station apparatus 3 on the PDSCH may be dedicated signaling (also referred to as “dedicated signaling” or “UE specific signaling”) to a certain terminal apparatus 1. Signaling dedicated to the terminal device 1 is also called dedicated RRC signaling. Upper layer parameters unique to the serving cell may be transmitted using common signaling to a plurality of terminal devices 1 in the serving cell or dedicated signaling to a certain terminal device 1. UE-specific upper layer parameters may be transmitted to a certain terminal device 1 by using dedicated signaling.

BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example, BCCH is an upper layer channel used for transmitting MIB. CCCH (Common Control Channel) is an upper layer channel used for transmitting common information in a plurality of terminal devices 1. Here, the CCCH may be used for the terminal device 1 that is not RRC connected, for example. The 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 the terminal device 1 that is RRC-connected, for example.

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

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

Hereinafter, a configuration example of the terminal device 1 according to one aspect of the present embodiment will be described.

FIG. 6 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 is configured to include a wireless transmission / reception unit 10 and an upper layer processing unit 14. The wireless transmission / reception unit 10 includes at least a part or all of an antenna unit 11, an RF (Radio Frequency) unit 12, and a baseband unit 13. The upper layer processing unit 14 is configured to include at least a part or all of the medium access control layer processing unit 15 and the radio resource control layer processing unit 16. The wireless transmission / reception unit 10 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit.

The upper layer processing unit 14 outputs the uplink data (transport block) generated by the user's operation or the like to the wireless transmission / reception unit 10. The upper layer processing unit 14 processes the MAC layer, the packet data integration protocol (PDCP: Packet Data Convergence Protocol) layer, the radio link control (RLC: Radio Link Control) layer, and the RRC layer.

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

The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing of the RRC layer. 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 various setting information / parameters received from the base station device 3. The parameter may be an upper layer parameter.

The wireless transmission / reception unit 10 performs physical layer processing such as modulation, demodulation, encoding, and decoding. The wireless 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 wireless transmission / reception unit 10 generates a physical signal by modulating, coding, and generating a baseband signal (conversion into a time continuous signal), and transmits the physical signal to the base station device 3.

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

The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal, performs a fast Fourier transform (FFT: Fast Fourier Transform) on the signal from which the CP is removed, and outputs a 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, and generates a baseband digital signal to generate a baseband signal. The band digital signal is converted into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

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

Hereinafter, a configuration example of the base station device 3 according to one aspect of the present embodiment will be described.

FIG. 7 is a schematic block diagram showing the configuration of the base station device 3 according to an aspect of the present embodiment. As illustrated, the base station device 3 is configured to include a wireless transmission / reception unit 30 and an upper layer processing unit 34. The wireless transmission / reception unit 30 includes an antenna unit 31, an RF unit 32, and a baseband unit 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 wireless transmission / reception unit 30 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit.

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

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

The radio resource control layer processing unit 36 included in the upper layer processing unit 34 performs processing of the RRC layer. The radio resource control layer processing unit 36 generates downlink data (transport block) arranged on the PDSCH, system information, RRC message, MAC CE, or the like, or obtains it from the upper node and outputs it to the radio transmission / reception unit 30. .. Further, 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 a signal of an upper layer. That is, the radio resource control layer processing unit 36 transmits / notifies information indicating various setting information / parameters.

The function of the wireless transmission / reception unit 30 is the same as that of the wireless transmission / reception unit 10, and therefore description thereof is omitted.

Each of the units 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 included in the base station device 3 may be configured as a circuit. A part or all of the units denoted by reference numerals 10 to 16 included in the terminal device 1 may be configured as a memory and a processor connected to the memory. A part or all of the units denoted by reference numerals 30 to 36 included in the base station device 3 may be configured as a memory and a processor connected to the memory. Various aspects (operations and processes) according to the present embodiment may be realized (performed) in the memory included in the terminal device 1 and / or the base station device 3 and the processor connected to the memory.

Below, various examples of aspects will be explained.

FIG. 8 is a diagram showing an example of setting a monitoring opportunity for a search area set according to one aspect of the present embodiment. In FIG. 8, monitoring opportunities 801, 802, and 803 of the search area set are set. Here, a part of the search area set monitoring opportunity 801 and the search area set monitoring opportunity 802 overlap in the time domain, and the search area set monitoring opportunity 802 and the search area set monitoring opportunity 803 are provided. Part of is overlapping in the time domain. Further, the monitoring priority of the search area set monitoring opportunity 801 is higher than the monitoring priority of the search area set monitoring opportunity 802, and the monitoring priority of the search area set monitoring opportunity 802 is the search area set monitoring. Higher priority than the monitoring of opportunity 803. A search area set monitoring opportunity 801 corresponds to the control resource set 811, a search area set monitoring opportunity 802 corresponds to the control resource set 812, and a search area set monitoring opportunity 803 corresponds to the control resource set 813. Here, the correspondence between a monitoring opportunity of a certain search area set and a certain control resource set may correspond to the certain search area set and a certain control resource set. The correspondence between a certain search area set and a certain control resource set may be that the index of the certain control resource set is indicated in the parameter of the upper layer used for setting the certain search area set.

The priority of monitoring with respect to the monitoring opportunity of the search area set is the type of the search area set, the index of the search area set, the index of the control resource set corresponding to the monitoring opportunity of the search area set, and / or the search area. It may be provided based on at least some or all of the indices of the serving cells for which the set is set.

-A monitoring opportunity for the set of search areas to be monitored may be given based at least on the priority of monitoring. For example, when the PDCCH is set to be monitored in the monitoring opportunities of two or more overlapping search area sets, the monitoring opportunity of the search area sets corresponding to at least the first control resource set corresponding to CSS is monitored. May be.

In addition, a downlink signal that is QCL with the second control resource set of the control resource sets corresponding to each of the monitoring opportunities of the two or more overlapping search area sets is not the QCL with the first control resource set. If the same as the downlink signal, the monitoring opportunity of the search area set corresponding to the second control resource set may be monitored.

In addition, the downlink signal that is QCL and the third control resource set of the control resource sets corresponding to the monitoring opportunities of the two or more overlapping search region sets is not the QCL and the first control resource set. When it is different from the downlink signal, the monitoring opportunity of the search area set corresponding to the third control resource set may not be monitored.

Further, when at least two or more control resource sets correspond to at least one CSS among the control resource sets corresponding to the monitoring opportunities of the two or more overlapping search area sets, the index of the serving cell is the smallest. The monitoring opportunity of the search area set corresponding to the fourth control resource set corresponding to at least the CSS having the smallest index of the search area set may be monitored.

In addition, the downlink signal that is QCL and the fifth control resource set of the control resource sets corresponding to each of the monitoring opportunities of the two or more overlapping search region sets is not the QCL and the fourth control resource set. If it is the same as the downlink signal, the monitoring opportunity of the search area set corresponding to the fifth control resource set may be monitored.

Further, the sixth control resource set of the control resource sets corresponding to each of the monitoring opportunities of the two or more overlapping search region sets and the QCL downlink signal are not included in the QCL downlink signal. When it is different from the downlink signal, the monitoring opportunity of the search area set corresponding to the sixth control resource set may not be monitored.

Further, when none of the control resource sets corresponding to the monitoring opportunities of the two or more overlapping search area sets corresponds to CSS, the index of the serving cell is the smallest and the search area set The monitoring opportunity of the search area set corresponding to the seventh control resource set corresponding at least to the USS having the smallest index of may be monitored.

Further, the downlink signal that is QCL and the eighth control resource set of the control resource sets corresponding to the respective monitoring opportunities of the two or more overlapping search area sets is not the QCL and the seventh control resource set. If it is the same as the downlink signal, the monitoring opportunity of the search area set corresponding to the eighth control resource set may be monitored.

In addition, the downlink signal that is QCL and the ninth control resource set of the control resource sets corresponding to the monitoring opportunities of the two or more overlapping search area sets is the same as the seventh control resource set and the QCL. When it is different from the downlink signal, the monitoring opportunity of the search area set corresponding to the ninth control resource set may not be monitored.

Here, the monitoring opportunity of the monitored search area set may be included in the monitoring opportunity of the two or more overlapping search area sets. Further, the monitoring opportunity of the unmonitored search area set may be included in the monitoring opportunity of the two or more overlapping search area sets.

Here, each of at least two control resource sets of the two or more control resource sets and the QCL downlink signal may be different.

When each of the control resource sets corresponding to each of the monitoring opportunities of the two or more overlapping search area sets and the QCL downlink signal are the same, each of the monitoring opportunities of the two or more overlapping search area sets is It may be monitored.

As shown in FIG. 8, when three or more search area sets overlap, the reference monitoring opportunity of the search area set is first determined, and the reference monitoring opportunity of the search area set and the monitoring opportunity of the search area set overlapping with each other are determined. It is preferable to determine.

An example method for determining the reference monitoring opportunity of the search area set is shown below.
First method: In a certain period, a monitoring opportunity of a search area set which is started (or delayed) in timing may be given as a reference monitoring opportunity of the search area set.
Second method: In a certain period, in a certain period, a monitoring opportunity of a search area set having a late (or early) termination timing may be given as a reference monitoring opportunity of the search area set.
Third method: Among the monitoring opportunities of the search area set set in a certain period, the monitoring opportunity of the search area set having the highest monitoring priority may be given as the reference monitoring opportunity of the search area set.
Fourth method: Among the monitoring opportunities of the search area set set in a certain period, the monitoring opportunity of the search area set having the lowest monitoring priority may be given as the reference monitoring opportunity of the search area set.

For example, the certain period may correspond to the length of the slot. The certain length may correspond to the length of the slot for the smallest μ among the subcarrier spacing settings μ set in the serving cell. The certain length may correspond to the length of the subframe. For example, the certain period may be the length of the reference monitoring opportunity of the search region set.

For example, a monitoring opportunity (reference monitoring opportunity) for a certain search area set may be selected from the monitoring opportunities for a plurality of search area sets. Then, among the monitoring opportunities of the plurality of search area sets, the monitoring opportunity of one or a plurality of search area sets overlapping with the reference monitoring opportunity may be given. Of the control resource sets corresponding to the reference monitoring opportunity and the monitoring opportunities of the one or more search area sets, the priority of monitoring for each of the reference monitoring opportunity and the monitoring opportunity of the one or more search area sets. Based on, one or more control resource sets may be provided. The PDCCH may be monitored at a monitoring opportunity of one or a plurality of search area sets corresponding to the one or a plurality of control resource sets and included in the monitoring opportunities of the plurality of search area sets. The reference monitoring opportunity may be given based at least on the timing at which the monitoring opportunity for the search area set starts, the timing at which the monitoring opportunity for the search area set ends, and some or all of the monitoring priorities.

-The monitoring opportunity for one or more search area sets that overlaps the reference monitoring opportunity for the search area set may not include the monitoring opportunity for the search area set that is dropped based on at least the priority of monitoring.

-The monitoring opportunity for one or more search area sets that overlaps with the reference monitoring opportunity for the search area set may include the monitoring opportunity for the search area set dropped based on at least the priority of monitoring. In other words, regardless of whether or not the search area set is dropped based on at least the monitoring priority, a search area set monitoring opportunity that overlaps with the search area set reference monitoring opportunity may be selected.

For example, in the first method, the reference monitoring opportunity may be the monitoring opportunity of the first search area set in the time domain. Further, in the first method, the reference monitoring opportunity may be a monitoring opportunity of a search area set whose start timing is early (or late).

For example, in the second method, the reference monitoring opportunity may be a monitoring opportunity of the search area set that ends in the time domain. Further, in the first method, the reference monitoring opportunity may be a monitoring opportunity of a search area set whose end timing is late (or early).

For example, in the third method, the reference monitoring opportunity may be the monitoring opportunity of the search area set having the highest monitoring priority among the monitoring opportunities of the search area set set in a certain period. Further, in the third method, the reference monitoring opportunity may be a monitoring opportunity of the search area set having the highest monitoring priority.

For example, in the fourth method, the reference monitoring opportunity may be the monitoring opportunity of the search area set having the lowest monitoring priority among the monitoring opportunities of the search area set set in a certain period. In the fourth method, the reference monitoring opportunity may be a monitoring opportunity of the search area set having the lowest monitoring priority.

FIG. 9 is a diagram showing an example of pseudo code showing a method of determining a reference monitoring opportunity of a monitoring opportunity of a search area set set in a certain period. <AX> in FIG. 9 is also referred to as step AX. In FIG. 9, “A = B” may mean that A is set to B. In FIG. 9, “A = B” may mean that B is input to A.

In step A1, set Q to the monitoring opportunity of one or more search area sets set in a certain period. Here, the monitoring opportunity of the search area set may be set to Q after performing a predetermined ordering.

For example, in the first method, the predetermined ordering may be given based on the timing when the monitoring opportunity of the search area set is started. Further, the predetermined ordering may be that the ordering is performed in order from the earliest timing of starting the monitoring opportunity of the search area set. The timing at which the monitoring opportunity of the search area set is started may be given by the OFDM symbol at the head of the monitoring opportunity of the search area set.

In the first method, when the monitoring opportunities of a certain two search area sets start at the same time, the monitoring opportunities of the two search area sets may be ordered in ascending order of period. Good. Further, in the first method, when the monitoring opportunities of a certain two search area sets start at the same time, the monitoring opportunities of the two search area sets may be ordered in the order of the longer period. Good.

For example, in the first method, the predetermined ordering may be given based on the timing when the monitoring opportunity of the search area set ends. Further, the predetermined ordering may be that the ordering is performed in the order of the earliest timing at which the monitoring opportunity of the search area set ends. The end of the monitoring opportunity of the search area set may be given by the last OFDM symbol of the monitoring opportunity of the search area set.

Moreover, in the first method, when the monitoring opportunities of a certain two search area sets end at the same timing, the monitoring opportunities of the two search area sets may be ordered in ascending order of period. .. Further, in the first method, if the monitoring opportunities of a certain two search area sets end at the same timing, the monitoring opportunities of the two search area sets may be ordered in the order of increasing period. ..

For example, in the second method, the predetermined ordering may be given based on the timing when the monitoring opportunity of the search area set is started. In addition, the predetermined ordering may be that the ordering is performed in the ascending order of the start timing of the monitoring opportunity of the search area set.

Further, in the second method, when the monitoring opportunities of a certain two search area sets start at the same time, the monitoring opportunities of the two search area sets may be ordered in ascending order of period. Good. Further, in the first method, when the monitoring opportunities of a certain two search area sets start at the same time, the monitoring opportunities of the two search area sets may be ordered in the order of the longer period. Good.

For example, in the second method, the predetermined ordering may be given based on the timing when the monitoring opportunity of the search area set ends. Further, the predetermined ordering may be that the ordering is performed in the ascending order of the timing when the monitoring opportunity of the search area set ends.

Further, in the second method, when the monitoring opportunities of a certain two search area sets end at the same timing, the monitoring opportunities of the two search area sets may be ordered in ascending order of period. .. Further, in the first method, if the monitoring opportunities of a certain two search area sets end at the same timing, the monitoring opportunities of the two search area sets may be ordered in the order of increasing period. ..

For example, in the third method or the fourth method, the predetermined ordering may be given based at least on the priority of monitoring with respect to the monitoring opportunity of the search area set. For example, the monitoring priority may be given in consideration of the type of search area set (CSS or USS), the index of the serving cell, and the index of the search area set in this order. For example, the priority of monitoring may be given in consideration of the type of search area set (CSS or USS), the index of the search area set, and the index of the serving cell.

In step A2, c (Q) is set to the original number (cardinality) of Q.

In step A3, j is set to 0. Here, j is the index of the monitoring opportunity of the search area set in Q.

In step A4, set o to 0. Here, o is related to the number of monitoring opportunities of overlapping search area sets.

If j <c (Q) is satisfied in step A5, the process proceeds to step A6. When j <c (Q) is not satisfied in step A5, the process proceeds to step A14.

In step A6, j <c (Q) -1 is satisfied, and the search opportunity of the search area set set to Q (jo) and the monitor opportunity of the search area set set to Q (j + 1) are set. If they overlap, the process may proceed to step A7. Further, in step A6, j <c (Q) −1 is satisfied, and at least one of the search area set monitoring opportunities set from Q (j−o) to Q (j) and Q (j + 1). When the monitoring opportunities of the search area sets set in No. 1 and No. 2 overlap, the process may proceed to step A7. In step A6, j <c (Q) -1 is not satisfied, or the search area set monitoring opportunity set to Q (jo) and the search area set monitoring opportunity set to Q (j + 1) are If they do not overlap, the process may proceed to step A9. Further, in step A6, j <c (Q) -1 is not satisfied, or all the monitoring opportunities of the search area set set from Q (j-o) to Q (j) and Q (j + 1) are set. When the monitoring opportunities of the search area sets to be performed do not overlap, the process may proceed to step A9.

Here, the monitoring opportunity of the search area set set to Q (jo) may be the reference monitoring opportunity of the search area set. Further, the monitoring opportunity of the search area set set from Q (jo) to Q (j) may be a set of reference monitoring opportunities of the search area set.

In step A7, o + 1 is set to o.

In step A8, j + 1 is set to j.

In step A9, if o is greater than 0, proceed to step A10. When o is equal to 0 in step A10, the process proceeds to step A11.

In step A10, the monitoring opportunity of the search area set set from Q (j−o) to Q (j) is recognized as overlap. In step A10, the monitoring opportunity of the search area sets to be monitored is given to the monitoring opportunity of the search area sets that are identified as overlapping, based on at least the priority of monitoring. In step A10, null is set to the entry of Q in which the monitoring opportunity of the unmonitored search area set is set based at least on the priority of monitoring.

At step A11, proceed to step A12.

At step A12, j + 1 is set to j.

At step A13, proceed to step A14.

At step A14, proceed to step A5.

For example, in the terminal device 1, the monitoring opportunity of the first search area set and the second search area set overlap, the second search area set and the third search area set overlap, and It may not be (or may not be expected) that the first search area set and the third search area set do not overlap. Here, the first control resource set corresponding to the first search area set and the QCL downlink signal, and the second control resource set corresponding to the second search area set and the QCL downlink signal are May be different. Further, the second control resource set corresponding to the second search area set and the QCL downlink signal, the third control resource set corresponding to the third search area set, and the QCL downlink signal are May be different. Also, the first control resource set corresponding to the first search area set and the QCL downlink signal, and the third control resource set corresponding to the third search area set and the QCL downlink signal May be different or the same. Further, the monitoring priority of the monitoring opportunity of the first search area set is higher than the monitoring priority of the monitoring opportunity of the second search area set, and the monitoring opportunity of the second search area set is monitored. May have a higher priority than the monitoring priority for the monitoring opportunity of the third search area set. Further, the monitoring priority of the monitoring opportunity of the third search area set is higher than the monitoring priority of the monitoring opportunity of the second search area set, and the monitoring opportunity of the second search area set is monitored. May have a higher priority than the monitoring priority for the monitoring opportunity of the first search area set.

For example, in the base station device 3, the monitoring opportunity of the first search area set overlaps with the second search area set, and the second search area set overlaps with the third search area set. Also, the first search area set and the third search area set may not overlap. In addition, when the monitoring opportunity of the first search area set and the second search area set overlap, the base station device 3 overlaps the second search area set and the third search area set. Moreover, it is not necessary to set such that the first search area set and the third search area set do not overlap. Further, the base station device 3 does not overlap the second search area set and the third search area set when the monitoring opportunity of the first search area set and the second search area set overlap. Alternatively, the first search area set and the third search area set may be set to overlap.

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

(1) In order to achieve the above object, the embodiments of the present invention take the following means. That is, a first aspect of the present invention is a terminal device, and an upper layer processing unit configured to set a plurality of search area sets based on parameters of an upper layer, and monitoring the plurality of search area sets in a certain period. A receiver that monitors the PDCCH at one or more of the opportunities of monitoring the search area set, and selects a reference monitoring opportunity of the search area set from among the monitoring opportunities of the plurality of search area sets, Of the monitoring opportunities of the plurality of search area sets, one or more monitoring opportunities included in the monitoring opportunity group are selected, and the monitoring opportunity group has one or more of the reference monitoring opportunity and the reference monitoring opportunity. A control that includes a plurality of surveillance opportunities and that corresponds to one or more search area sets corresponding to the one or more surveillance opportunities included in the surveillance opportunity group. Selection of one or more control resource sets based on priority among source sets, and one or more search area sets corresponding to the selected one or more control resource sets in the certain period The PDCCH is monitored in one or more monitoring occasions, and the selection of the reference monitoring opportunity is based on the start time (start position) of the monitoring opportunity, the end time of the monitoring opportunity (end position), or the priority. Is done.

(2) Further, a second aspect of the present invention is a base station apparatus, wherein an upper layer processing unit that sets a plurality of search area sets based on parameters of an upper layer, and the plurality of searches in a certain period. Among the monitoring opportunities of the area sets, a transmitting unit that transmits the PDCCH at the monitoring opportunities of the one or more search area sets, and a reference monitoring opportunity of the search area sets among the monitoring opportunities of the plurality of search area sets. One or more monitoring opportunities included in a monitoring opportunity group are selected from among the monitoring opportunities of the plurality of search area sets, and the monitoring opportunity group overlaps the reference monitoring opportunity and the reference monitoring opportunity. Corresponding to one or more search area sets corresponding to the one or more monitoring opportunities included in the monitoring opportunity group. One or more control resource sets among the resource sets are selected based on priority, and one or more search areas corresponding to the selected one or more control resource sets in the certain period. The PDCCH is transmitted in one or more monitoring opportunities of the set, and the selection of the reference monitoring opportunity is based on the start time (start position) of the monitoring opportunity, the end time of the monitoring opportunity (end position), or the priority. It is done based on.

A program that operates in the base station device 3 and the terminal device 1 according to the present invention controls a CPU (Central Processing Unit) or the like (functions a computer so as to realize the functions of the above-described embodiments according to the present invention. Program). The 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). When necessary, the CPU reads, corrects and writes.

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

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

Further, "computer-readable recording medium" means a program that dynamically holds a program for a short time, such as a communication line when transmitting the program through a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory that holds a program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or a client in that case, may be included. Further, the program may be for realizing a part of the above-described functions, and may be a program for realizing the above-mentioned functions 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 forming the device group may include a part or all of the functions or function blocks of the base station device 3 according to the above-described embodiment. It suffices for the device group to have one type of each function or each functional block of the base station device 3. Further, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as an aggregate.

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

Also, part or all of the terminal device 1 and the base station device 3 in the above-described embodiments may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chip set. Each functional block of the terminal device 1 and the base station device 3 may be individually made into a chip, or a part or all of them may be integrated and made into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when a technique for forming an integrated circuit that replaces LSI appears with the progress of semiconductor technology, it is possible to use an integrated circuit according to the technique.

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

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes and the like within a range not departing from the gist of the present invention. The present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Be done. Further, a configuration in which the elements described in each of the above embodiments and having the same effect are replaced with each other is also included.

Claims (4)

1. An upper layer processing unit that sets a plurality of search area sets based on parameters of the upper layer,
   A receiver for monitoring the PDCCH at one or more search area set monitoring opportunities among the plurality of search area set monitoring opportunities in a certain period,
   Of the monitoring opportunities of the plurality of search area sets, select the reference monitoring opportunity of the search area set,
   Selecting one or more monitoring opportunities included in a monitoring opportunity group from among the monitoring opportunities of the plurality of search area sets,
   The monitoring opportunity group includes the reference monitoring opportunity and one or more monitoring opportunities that overlap with the reference monitoring opportunity,
   Selection of one or more control resource sets based on priority among control resource sets corresponding to one or more search area sets corresponding to the one or more monitoring opportunities included in the monitoring opportunity group. Done,
   The PDCCH is monitored at one or more monitoring occasions of one or more search region sets corresponding to the selected one or more control resource sets in the certain time period,
   The terminal device is selected based on the start time (start position) of the monitoring opportunity, the end time (end position) of the monitoring opportunity, or the priority.
2. An upper layer processing unit that sets a plurality of search area sets based on parameters of the upper layer,
   A transmitting unit that transmits a PDCCH at one or more search area set monitoring opportunities among the plurality of search area set monitoring opportunities in a certain period,
   Of the monitoring opportunities of the plurality of search area sets, select the reference monitoring opportunity of the search area set,
   Selecting one or more monitoring opportunities included in a monitoring opportunity group from among the monitoring opportunities of the plurality of search area sets,
   The monitoring opportunity group includes the reference monitoring opportunity and one or more monitoring opportunities that overlap with the reference monitoring opportunity,
   Selection of one or more control resource sets based on priority among control resource sets corresponding to one or more search area sets corresponding to the one or more monitoring opportunities included in the monitoring opportunity group. Done,
   The PDCCH is transmitted on one or more monitoring occasions of one or more search area sets corresponding to the selected one or more control resource sets in the certain time period,
   The base station apparatus selects the reference monitoring opportunity based on a start time (start position) of the monitoring opportunity, an end time (end position) of the monitoring opportunity, or the priority.
3. A communication method used for a terminal device,
   A step of setting a plurality of search area sets based on parameters of the upper layer,
   Monitoring the PDCCH at one or more of the search area set monitoring opportunities of the plurality of search area set monitoring opportunities during a period of time,
   Of the monitoring opportunities of the plurality of search area sets, select the reference monitoring opportunity of the search area set,
   Selecting one or more monitoring opportunities included in a monitoring opportunity group from among the monitoring opportunities of the plurality of search area sets,
   The monitoring opportunity group includes the reference monitoring opportunity and one or more monitoring opportunities that overlap with the reference monitoring opportunity,
   Selection of one or more control resource sets based on priority among control resource sets corresponding to one or more search area sets corresponding to the one or more monitoring opportunities included in the monitoring opportunity group. Done,
   The PDCCH is monitored at one or more monitoring occasions of one or more search region sets corresponding to the selected one or more control resource sets in the certain time period,
   The selection of the reference monitoring opportunity is a communication method performed based on the start time (start position) of the monitoring opportunity, the end time (end position) of the monitoring opportunity, or the priority.
4. A communication method used for a base station device,
   A step of setting a plurality of search area sets based on parameters of the upper layer,
   Transmitting a PDCCH at one or more search area set monitoring opportunities among the plurality of search area set monitoring opportunities in a certain period,
   Of the monitoring opportunities of the plurality of search area sets, select the reference monitoring opportunity of the search area set,
   Selecting one or more monitoring opportunities included in a monitoring opportunity group from among the monitoring opportunities of the plurality of search area sets,
   The monitoring opportunity group includes the reference monitoring opportunity and one or more monitoring opportunities that overlap with the reference monitoring opportunity,
   Selection of one or more control resource sets based on priority among control resource sets corresponding to one or more search area sets corresponding to the one or more monitoring opportunities included in the monitoring opportunity group. Done,
   The PDCCH is transmitted on one or more monitoring occasions of one or more search area sets corresponding to the selected one or more control resource sets in the certain time period,
   The selection of the reference monitoring opportunity is a communication method performed based on the start time (start position) of the monitoring opportunity, the end time (end position) of the monitoring opportunity, or the priority.

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