WO2021130940A1 - Terminal and wireless communication method - Google Patents

Abstract

A terminal according to an aspect of the present disclosure comprises: a reception unit that receives information related to the scheduling type applied to a primary cell; and a control unit that, on the basis of at least one of the information related to the scheduling type and a frequency range in which a physical shared channel of the primary cell is transmitted, determines a cell in which a downlink control channel that schedules the physical shared channel of the primary cell is transmitted.

Description

Terminal and wireless communication method

The present disclosure relates to terminals and wireless communication methods in next-generation mobile communication systems.

In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

A successor system to LTE (for example, 5th generation mobile communication system (5G), 5G + (plus), New Radio (NR), 3GPP Rel.15 or later, etc.) is also being considered.

In the existing LTE system (for example, 3GPP Rel.8-14), the user terminal (UE: User Equipment) is based on the downlink control information (DCI: Downlink Control Information, DL assignment, etc.) from the base station. , Controls the reception of downlink shared channels (for example, PDSCH: Physical Downlink Shared Channel). Further, the user terminal controls transmission of an uplink shared channel (for example, PUSCH: Physical Uplink Shared Channel) based on DCI (also referred to as UL grant or the like).

Further, in the existing LTE system, cross-carrier scheduling is performed for a UE in which a plurality of cells (or CCs) are set by scheduling other secondary cells using the downlink control channel of the primary cell (or secondary cell). Is supported.

In the existing system, when cross-carrier scheduling is applied, the primary cell is configured to function only as the cell that schedules the secondary cell. A cell that schedules another cell is called a scheduling cell, and a cell that is scheduled from another cell may be called a scheduled cell or an unscheduled cell.

In future wireless communication systems (for example, Rel.17 or later), it is being considered that a configuration in which the primary cell is a scheduled cell is also supported or allowed. For example, it is assumed that the secondary cell schedules the physical shared channel of the primary cell, that is, the downlink control channel (or downlink control information) that schedules the physical shared channel of the primary cell is transmitted in the secondary cell.

However, how to control cross-carrier scheduling (also called cross-selling scheduling) when the primary cell becomes a scheduled cell has not yet been sufficiently examined.

Therefore, one of the purposes of the present disclosure is to provide a terminal and a wireless communication method capable of appropriately controlling communication even when the primary cell is scheduled from another cell.

A terminal according to one aspect of the present disclosure is at least one of a receiver that receives information about a scheduling type applied to a primary cell and a frequency range in which information about the scheduling type and the physical shared channel of the primary cell are transmitted. Based on the above, it is characterized by having a control unit for determining a cell to which a downlink control channel for scheduling a physically shared channel of the primary cell is transmitted.

According to one aspect of the present disclosure, communication can be appropriately controlled even when the primary cell is scheduled from another cell.

FIG. 1 is a diagram showing an example of cross-carrier scheduling in an existing system. FIG. 2 is a diagram showing an example of cross-carrier scheduling setting information in an existing system. FIG. 3 is a diagram showing an example of cross-carrier scheduling according to the first aspect. FIG. 4 is a diagram showing another example of cross-carrier scheduling according to the first aspect. FIG. 5 is a diagram showing another example of cross-carrier scheduling according to the first aspect. FIG. 6 is a diagram showing another example of cross-carrier scheduling according to the first aspect. FIG. 7 is a diagram showing another example of cross-carrier scheduling according to the first aspect. FIG. 8 is a diagram showing another example of cross-carrier scheduling according to the first aspect. FIG. 9 is a diagram showing an example of cross-carrier scheduling according to the second aspect. FIG. 10 is a diagram showing another example of cross-carrier scheduling according to the second aspect. FIG. 11 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 12 is a diagram showing an example of the configuration of the base station according to the embodiment. FIG. 13 is a diagram showing an example of the configuration of the user terminal according to the embodiment. FIG. 14 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.

<Cross-carrier scheduling>
In the existing LTE system, cross-carrier scheduling that schedules the physical shared channel of the secondary cell using the downlink control channel (for example, PDCCH) of the primary cell for the UE in which multiple cells (or CCs) are set. (CCS) is supported. The physical shared channel may be, for example, at least one of a downlink shared channel (for example, PDSCH) and an uplink shared channel (for example, PUSCH). Also, the secondary cell may schedule another secondary cell.

When the network (for example, a base station) sets cross-carrier scheduling in the UE, the cell scheduled in the DCI using the 3-bit CIF (Carrier Indicator Field) included in the downlink control information (for example, DCI). May be specified. The UE controls the transmission or reception of the physically shared channel scheduled by the DCI based on the CIF contained in the received DCI (or PDCCH) (or determines the cell by which the physical shared channel is scheduled by the DCI). To do.

FIG. 1 is a diagram showing an example in the case of applying cross-carrier scheduling. In FIG. 1, the downlink control information (DCI # 1) instructing the allocation of at least one of PDSCH and PUSCH (hereinafter, also referred to as PDSCH / PUSCH) transmitted in CC # 1 (for example, a secondary cell) is different. It is transmitted by PDCCH of CC # 0 (for example, primary cell). At this time, in order to identify which CC (CC0 or CC1) PDSCH / PUSCH allocation is indicated by the downlink control information (DCI # 1) transmitted by the PDCCH of CC # 1, the carrier identifier (DCI # 1) A DCI configuration with CI: Carrier Indicator) is applied.

In the existing system, when cross-carrier scheduling is applied, a field (CIF) for a 3-bit carrier identifier is set in the DCI, and the CC (or cell) scheduled in the DCI is notified to the UE. The UE performs a PDSCH reception process or a PUSCH transmission process in a predetermined CC based on the CIF included in the DCI.

Assume that cross-carrier scheduling is set or applied to a certain cell (or CC). In such a case, the UE may be notified of information that cross-carrier scheduling is set or applied to the cell and information about from which cell the scheduling is performed. Such information regarding whether or not cross-carrier scheduling is applied and information regarding a scheduling cell (for example, a cell that transmits a CIF) are used as higher layer signaling (for example, RRC signaling) of the scheduled cell (for example, scheduled cell). , The base station may notify the UE.

Here, the cell that controls the allocation of PDSCH / PUSCH of another cell (CC) (or transmits DCI including CIF) may be called a scheduling cell (Scheduling Cell) or a scheduling cell. Further, a cell in which cross-carrier scheduling is set (for example, a cell scheduled based on CIF) may be referred to as a scheduled cell (Scheduled Cell) or a scheduled cell.

The cross-carrier scheduling shown in FIG. 1 shows a case where the scheduling cell corresponds to Cell # 0 (CC # 0) and the scheduled cell corresponds to Cell # 1 (corresponding to CIF = 1).

The UE determines the scheduled cell based on the index (for example, ServeCellIndex) corresponding to the 3-bit CIF value included in the PDCCH (or DCI) transmitted in the scheduling cell. When allocating PDSCH / PUSCH of the scheduling cell (self-schedule), a DCI including a CIF of a specific bit value (for example, CIF = 0) may be transmitted.

The correspondence between the CIF value and the ServeCellIndex value may be set by higher layer signaling or the like. In this case, CIF is set in the PDCCH (or DCI) of the scheduling cell, and information on the correspondence relationship of the index (for example, ServeCellIndex) of the scheduled cell (CC) corresponding to each CIF value is transmitted by upper layer signaling. You may.

FIG. 2 is a diagram showing an example of cross-carrier scheduling setting information. The names of IE shown in FIG. 2 are merely examples, and are not limited to those shown in the drawings. As shown in FIG. 2, the cross-carrier scheduling setting information (CrossCarrierSchedulingConfig) may include either information regarding scheduling of the own cell (own) or information regarding scheduling by another cell (cross-carrier scheduling) (other). Good.

The information (own) regarding the scheduling of the own cell may include information (cif-Presence) indicating the presence or absence of CIF. When cif-Presence is true, the CIF value of the cell (scheduling cell) may be set to 0. If the CIF value of DCI transmitted in the scheduling cell is 0, the UE may determine that it is self-carrier scheduling.

The information (other) related to scheduling by other cells may include a cell identifier (cell index, scheduling cell ID, schedulingCellId) that signals DCI. For example, schedulingCellId tells the UE which cell signals DL allocation and UL grant. Further, the CIF value (cif-InSchedulingCell) of the cell (scheduled cell) used in the scheduling cell may be included in other.

When decoding the PDCCH (or DCI) of the common search space (CSS: Common Search Space), the UE may perform the decoding on the assumption that there is no CIF. That is, when the CIF is set, the UE decodes the control channel in which the CIF is set in the UE specific search space (USS: UE specific Search Space), and decodes the control channel in which the CIF is not set in the common search space.

It is expected that future wireless communication systems (for example, Rel.16, Rel.17 or Rel.18 or later) will also support cross-carrier scheduling. In the existing system, cross-carrier scheduling is not set for the primary cell. That is, the primary cell is always a scheduling cell and is scheduled by the PDCCH (or DCI) transmitted in the own cell (for example, self-carrier scheduling is applied).

On the other hand, in future wireless communication systems, in order to realize dynamic spectrum sharing (DSS), the physical sharing channel of the primary cell is scheduled by using the downlink control channel (or DCI) of the secondary cell. Is being considered. In other words, support is being considered for PDCCH in the secondary cell that schedules the physical shared channel in the primary cell.

However, when the primary cell becomes a scheduled cell, how to control cross-carrier scheduling becomes a problem. For example, when scheduling the physical shared channel of the primary cell using the downlink control channel (or DCI) transmitted in the secondary cell, how to control the scheduling type set in the primary cell is a problem. Become. Alternatively, how to control the monitor of the PDCCH that schedules the physical shared channel of the primary cell becomes a problem.

The present inventors focused on a case where cross-carrier scheduling in which a secondary cell schedules a primary cell is supported or permitted, examined a control method for the cross-carrier scheduling, and conceived the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. The configurations according to each embodiment may be applied individually or in combination.

In the present embodiment, the primary cell may be read as at least one of PCell and PSCell (primary secondary cell). Further, the physical shared channel may be read as at least one of PDSCH and PUSCH. Further, cross-carrier scheduling may be read as cross-selling scheduling. Further, self-carrier scheduling may be read as self-scheduling.

Further, in the present embodiment, the physical shared channel of the primary cell may be read as the physical shared channel transmitted by the primary cell. Further, in the following description, a case where the UE applies cross-carrier scheduling in two cells (or 2CC) of a primary cell and a secondary cell is shown, but the number of applicable cells is not limited to two but is three or more. You may.

(First aspect)
In the first aspect, an example of controlling a cell that schedules a physical shared channel of the primary cell based on a scheduling type applied to the primary cell will be described.

For a UE that supports cross-carrier scheduling for the primary cell, the network (for example, a base station) may set at least one of the following operations 1-1 to 1-3 in the UE. The UE that supports cross-carrier scheduling for the primary cell may be read as the UE that supports the PDCCH of the secondary cell that schedules the physical shared channel of the primary cell.

<Operation 1-1>
The base station does not have to set the first scheduling type scheduled from other cells for the primary cell and the second scheduling type for scheduling in its own cell. The first scheduling type may be cross-carrier scheduling and the second scheduling type may be self-carrier scheduling.

The base station may notify the UE of information about the scheduling type set or applied to the primary cell. In operation 1-1, the base station may set only cross-carrier scheduling for the primary cell. In this case, the base station may transmit information about one or more other cells to which the PDCCH that schedules the physical shared channel of the primary cell is transmitted as the information regarding the scheduling type.

Further, the information regarding the scheduling type may include at least one of the information regarding the index of the scheduling cell that schedules the primary cell and the information regarding the index when the primary cell is specified in the predetermined field of DCI. Information about the scheduling type may be notified or set from the base station to the UE using at least one of higher layer signaling and DCI.

The UE may determine the scheduling cell (eg, secondary cell) to schedule the primary cell based on the information about the scheduling type. As a result, the UE can determine the cell to which the PDCCH that schedules the physical shared channel of the primary cell is transmitted, and can appropriately receive the PDCCH (see FIG. 3).

FIG. 3 is a diagram showing an example of cross-carrier scheduling when the scheduling cell for scheduling the primary cell (CC # 0) is CC # 1. Here, the case where the PDSCH (or DCI) transmitted by CC # 1 is used to schedule the PDSCH and PUSCH of CC # 0 is shown. Further, the physically shared channel of CC # 1 may be self-carrier scheduled.

The cell that schedules the PDSCH of the primary cell (or the cell to which the PDCCH (or DCI) that schedules the PDCCH is transmitted) and the cell that schedules the PUSCH of the primary cell may be the same cell (FIG. 3). reference). When the PDSCH of the primary cell and the cell for scheduling the PUSCH are shared, the number of cells for which the UE monitors the PDCCH for the primary cell can be reduced.

Alternatively, the cell that schedules the PDSCH of the primary cell and the cell that schedules the PUSCH of the primary cell may be set independently (for example, in different cells) (see FIG. 4). For example, as shown in FIG. 4, a first secondary cell (eg, CC # 1) that schedules the PDSCH of the primary cell and a second secondary cell (eg, CC # 2) that schedules the PUSCH of the primary cell It may be set.

In such a case, the UE transmits a PDCCH (for example, DCI format 1-11) that schedules the PDSCH of the primary cell in the first secondary cell, and schedules a PUSCH of the primary cell in the second secondary cell (for example, DCI format). The reception process may be controlled on the assumption that 0-1) is transmitted.

By allowing the PDSCH and PUSCH cells of the primary cell to be set separately, it is possible to flexibly control the cells that schedule the PDCCH and PUSCH of the primary cell.

When the primary cell is set as a scheduled cell, the primary cell may not be set as a scheduling cell for scheduling the physical shared channel of another secondary cell. Alternatively, if the primary cell is configured as a scheduled cell, it may be allowed to be configured as a scheduling cell that schedules the physical shared channels of other secondary cells.

Further, the secondary cell, which is the scheduling cell for scheduling the primary cell, may be configured not to be scheduled (or not to be a scheduled cell) from other cells. That is, the scheduling cell that schedules the primary cell may have a configuration in which the physical shared channel of the own cell is scheduled by the PDCCH of the own cell (self-carrier scheduling is applied).

<Operation 1-2>
The base station does not set the first scheduling type (for example, cross-carrier scheduling) scheduled from other cells for the primary cell, but schedules in its own cell for the second scheduling type (for example, self-carrier scheduling). ) May be set.

The base station may notify the UE of information about the scheduling type set or applied to the primary cell. In operation 1-2, the base station may set only self-carrier scheduling for the primary cell. In this case, the base station may transmit information regarding the scheduling type indicating that the physical shared channel of the primary cell is scheduled by the PDCCH of the primary cell (for example, self-carrier scheduling is performed).

The UE may assume that the primary cell is not scheduled (or self-scheduled) in the secondary cell based on the information about the scheduling type (see Figure 5). FIG. 5 shows a case where the physical shared channel of the primary cell (CC # 0) is scheduled by the PDCCH (or DCI) transmitted in the CC # 0.

In this case, the UE may determine that the PDCCH (or DCI) that schedules the primary cell is transmitted in the primary cell (CC # 0) and control the reception processing of the PDCCH (or DCI). ..

The primary cell may be set as a scheduling cell for scheduling the physical shared channel of another secondary cell.

<Operation 1-3>
The base station has both a first scheduling type (for example, cross-carrier scheduling) scheduled from another cell for the primary cell and a second scheduling type (for example, self-carrier scheduling) for scheduling in its own cell. May be set (or enabled, activated).

The base station may notify the UE of information about the scheduling type set or applied to the primary cell. As information about the scheduling type, the base station may transmit information about one or more other cells to which the PDCCH that schedules the physical shared channel of the primary cell is transmitted.

The information regarding the scheduling type may include at least one of the information regarding the index of the scheduling cell that schedules the primary cell and the information regarding the index when the primary cell is specified in the predetermined field of DCI. Information on the scheduling type may be notified or set from the base station to the UE by using higher layer signaling or the like.

Alternatively, in addition to self-carrier scheduling (initial setting), cross-carrier scheduling scheduled from the secondary cell may be additionally set or performed for the primary cell. For example, the UE assumes that self-carrier scheduling is applied to the primary cell as the default (or initial scheduling type), and that cross-carrier scheduling is applied when cross-carrier scheduling is configured. You may.

Cross-carrier scheduling may be set from the base station to the UE by using at least one of higher layer signaling and downlink control information. The UE may control the reception of the PDCCH that schedules the primary cell in the primary cell, assuming that the self-carrier scheduling is applied when the cross-carrier scheduling is not set.

When cross-carrier scheduling is set, the UE may apply at least one of cross-carrier scheduling and self-carrier scheduling. If both self-carrier scheduling and cross-carrier scheduling are configured (or if cross-carrier scheduling is additionally configured), the UE may apply at least one of Option 1 and Option 2 below. Good.

Note that the following options may be applied when two scheduling types are set (or enabled, activated) in a configuration in which self-carrier scheduling and cross-carrier scheduling are set separately.

<Option 1>
Self-carrier scheduling and cross-carrier scheduling for the primary cell may be supported (or applied) at the same time.

For example, a first scheduling type (eg, cross-carrier scheduling) may be applied to the PDSCH of the primary cell and a second scheduling type (eg, self-carrier scheduling) may be applied to the PUSCH of the primary cell. .. Even if the UE assumes that the PDCCH (or DCI) that schedules the PDSCH of the primary cell is transmitted in another cell and the PDCCH (or DCI) that schedules the PUSCH of the primary cell is transmitted in the primary cell. Good (see Figure 6).

FIG. 6 shows a case where the PDSCH of the primary cell (CC # 0) is scheduled by the PDCCH of the secondary cell (CC # 1), and the PUSCH of CC # 0 is scheduled by the PDCCH of the CC # 0.

Alternatively, self-causing may be applied to the PDSCH of the primary cell, and cross-carrier scheduling may be applied to the PUSCH of the primary cell. The UE may assume that the PDCCH (or DCI) that schedules the PDSCH of the primary cell is transmitted in the primary cell, and the PDCCH that schedules the PUSCH of the primary cell is transmitted in another cell.

In this way, by allowing both self-carrier scheduling and cross-carrier scheduling to be applied based on the type of physical shared channel, it is possible to flexibly control the cell that schedules the primary cell.

Alternatively, both self-carrier scheduling and cross-carrier scheduling may be supported for PDSCH and PUSCH for one or more transmission / reception points. For example, self-carrier scheduling and cross-carrier scheduling may be applied to PDSCH transmitted from a certain transmission / reception point.

In this way, by allowing both self-carrier scheduling and cross-carrier scheduling to be applied at the same time, it is possible to flexibly control the scheduling of the physical shared channel.

<Option 2>
A configuration (eg, dynamic switching) that dynamically switches between self-carrier scheduling and cross-carrier scheduling for the primary cell may be supported or applied.

Switching between self-carrier scheduling and cross-carrier scheduling may be controlled based on the scheduling related to the configuration of the secondary cell (for example, configuration). For example, the UE may determine the switch based on at least one of the DCI format, search space, and control resource set configurations (eg, CORESET configurations).

For example, the UE may determine that, at least in the secondary cell (CC # 1), when a predetermined DCI is received, the scheduling type applied to the primary cell is switched or changed (see FIG. 7). FIG. 7 shows a case where the scheduling type applied to the primary cell is switched from self-carrier scheduling to cross-carrier scheduling.

Here, the case of switching from self-carrier scheduling to cross-carrier scheduling is shown, but cross-carrier scheduling may be switched to self-carrier scheduling. Further, a timer may be applied in the scheduling type switching operation. For example, the timer may be started when the first scheduling type is switched to the second scheduling type, and the first scheduling type may be applied again when the timer expires.

For example, if the DCI format of the secondary cell (CC # 1) is the predetermined DCI format and the search space is the common search space (CSS), self-carrier scheduling is applied, otherwise cross-carrier scheduling is applied. You may. The predetermined DCI format may be a DCI format for fallback (eg DCI format 0_0 or 1_0). As a result, even if the secondary cell (CC # 1) is deactivated, the scheduling of the physical shared channel of the primary cell can be continued.

Alternatively, the default scheduling type of the primary cell (CC # 0), self-carrier scheduling, can be switched to cross-carrier scheduling based on the DCI of at least one of the primary cell (CC # 0) and the secondary cell (CC # 1). You may.

Alternatively, switching between self-carrier scheduling and cross-carrier scheduling may be controlled based on the bandwidth portion (BWP) set in the secondary cell or the primary cell. For example, switching may be controlled based on the BWP (active BWP) activated in the secondary cell.

It is assumed that the secondary cell (CC # 1) has or is set to have two BWPs (for example, BWP # 0 and BWP # 1). The UE may determine that cross-carrier scheduling is applied to the primary cell when BWP # 0 is activated (or PDCCH is transmitted at BWP # 0). In this case, the UE may control the reception assuming that the PDCCH scheduling CC # 0 is transmitted in CC # 1 (see FIG. 8).

On the other hand, the UE may determine that self-carrier scheduling is applied to the primary cell when BWP # 1 is activated (or PDCCH is transmitted by BWP # 1). In this case, the UE may control the reception assuming that the PDCCH scheduling CC # 0 is transmitted in CC # 0.

Alternatively, if self-carrier scheduling and cross-carrier scheduling are set or supported for the primary cell, self-carrier scheduling may be applied only in certain conditions or cases. For example, the UE may apply cross-carrier scheduling in the first case below and self-carrier scheduling in the second case. The second case may be at least one of the following cases 1 to 4.

[Case 1]
When the secondary cell to be the scheduling cell is in the dormancy status or the deactivated status, self-carrier scheduling may be applied to the primary cell. The UE may assume that self-carrier scheduling is applied to the primary cell when communication is not possible in the scheduling cell (eg, PDCCH transmission is restricted) in the fallback conditions.

As a result, even if the secondary cell (CC # 1) is deactivated, the scheduling of the physical shared channel of the primary cell can be continued.

[Case 2]
In a contention based RACH procedure, self-carrier scheduling may be applied to at least one of message 2 and message 4 transmitted in the primary cell. Message 2 may be scrambled with RA-RNTI and message 4 may be scrambled with TC-RNTI or C-RNTI.

In a collision-type random access procedure, the UE schedules a PDCCH that schedules message 2 (for example, PDSCH) transmitted in the primary cell, and a PDCCH that schedules message 4 (for example, PDSCH) transmitted in the primary cell. It may be assumed that it is transmitted in a cell.

[Case 3]
In a non-collision random access procedure (contention free RACH procedure), self-carrier scheduling may be applied to at least one of the PDCCH orders, message 2 and message 4 transmitted in the primary cell. Message 2 may be scrambled with RA-RNTI and message 4 may be scrambled with C-RNTI.

The UE schedules a PDCCH order sent in the primary cell, a PDCCH scheduling message 2 (eg PDSCH), and a message 4 sent in the primary cell (eg PDSCH) in a non-collision random access procedure. PDCCH may be assumed to be transmitted in the primary cell.

[Case 4]
Self-carrier scheduling may be applied to a given DCI format transmitted in the common search space in the primary cell. The predetermined DCI format may be, for example, DCI format 0_0 or 1_0. Also, the predetermined DCI format may be scrambled with at least one of C-RNTI, CS-RNTI, and MCS-C-RNTI.

The UE may control the reception of the PDCCH on the assumption that the PDCCH (or DCI) transmitted in the common search space is transmitted in the primary cell.

Note that the cross-carrier scheduling for the primary cell (or the PDCCH of the secondary cell that schedules the physical shared channel of the primary cell) may be controlled for each frequency range. For example, cross-carrier scheduling for the primary cell may be set separately for the first frequency range (eg, FR1) and the second frequency range (eg, FR2). The frequency range may be set in band units, CC units, or BWP units. The frequency range may be read as the frequency domain.

In this case, the base station may notify the UE of whether or not cross-carrier scheduling is set for the primary cell for each frequency band by using upper layer signaling or the like. The UE may determine whether or not cross-carrier scheduling is applied in each frequency band based on the information notified from the base station (for example, information on the scheduling type).

Alternatively, cross-carrier scheduling for the primary cell may be configured to be supported only in a predetermined frequency range. For example, cross-carrier scheduling settings for the primary cell are supported for the first frequency range (eg FR1) and cross-carrier scheduling settings for the primary cell are supported for the second frequency range (eg FR2). The configuration may not be performed.

If the primary cell is configured in a frequency domain where the configuration of cross-carrier scheduling for the primary cell is not supported, the UE applies self-carrier scheduling to the primary cell (the PDCCH that schedules the physical shared channel of the primary cell is the primary cell. It may be determined that it will be transmitted).

(Second aspect)
In the second aspect, an example of UE operation (for example, monitoring of PDCCH) when cross-carrier scheduling is set for the primary cell will be described. When cross-carrier scheduling is set for the primary cell, at least one of operations 1-1 and operations 1-3 of the first aspect may be assumed. In the following description, PDCCH may be read as a PDCCH candidate.

The UE may receive information about one or more cells to which the PDCCH scheduling the physical shared channel of the primary cell is transmitted and determine whether cross-carrier scheduling is set or applied to the primary cell. The UE may determine at least one of the cell that monitors the PDCCH and the search space type that monitors the PDCCH, based on the cell (or cell type) to which the PDCCH is transmitted.

When cross-carrier scheduling is set for the primary cell (or when the PDCCH that schedules the primary cell is transmitted in at least the secondary cell), the UE has at least one of the following operations 2-1 to 2-2. May be done.

<Operation 2-1>
The UE may not be required to monitor the PDCCH in the UE-specific search space (eg, USS) of the primary cell (CC # 0) (see FIG. 9). In this case, the UE monitors the PDCCH in the UE-specific search space set in the scheduling cell (CC # 1) that schedules the primary cell (CC # 0). Further, the UE may control not to monitor the PDCCH in the UE-specific search space of CC # 0. As a result, the PDCCH can be selectively monitored in the scheduling cell to which the PDCCH is transmitted.

Note that the UE may be controlled to monitor PDCCH in the common search space set in CC # 0 even when cross-carrier scheduling is applied to the primary cell (CC # 0). As a result, it is possible to appropriately detect the PDCCH used for purposes other than scheduling the physical shared channel of the primary cell.

<Operation 2-2>
The UE may monitor the PDCCH in the UE-specific search space set in the primary cell (CC # 0) and the scheduling cell (CC # 1) that schedules the primary cell (CC # 0), respectively (FIG. 10). For example, when both cross-carrier scheduling and self-carrier scheduling are set for the primary cell, the UE monitors the PDCCH in the primary cell (CC # 0) and the secondary cell (CC # 1) that becomes the scheduling cell. May be done.

When monitoring both the primary cell and the scheduling cell, the PDCCH that schedules the physical shared channel of the primary cell may be transmitted in the UE-specific search space of the primary cell and the scheduling cell, respectively. In this case, a plurality of PDCCHs transmitted in at least one UE-specific search space of the primary cell and the scheduling cell may be controlled so as not to be transmitted in a predetermined range or a predetermined area.

For example, it may be controlled so that a plurality of PDCCHs are not transmitted in the same PDCCH monitoring occasion. Alternatively, transmission may be controlled so that the plurality of PDCCHs do not overlap in the time domain. Alternatively, it may be controlled so that a plurality of PDCCHs are not transmitted in the same slot.

The UE may control the reception of PDCCH on the assumption that a plurality of PDCCHs are not detected in a predetermined range or a predetermined area.

In addition, the UE detects a plurality of PDCCHs transmitted in at least one UE-specific search space of the primary cell and the scheduling cell, and a plurality of physical shared channels scheduled in each PDCCH are scheduled in a predetermined range or a predetermined area. In some cases, it is done. For example, there may be cases where the plurality of physically shared channels overlap in the time domain. Alternatively, there may be cases where the plurality of physically shared channels are scheduled in the same slot.

In such a case, if the UE has the ability to receive a plurality of physical shared channels (eg, PDSCH) or transmit a plurality of physical shared channels (eg, PUSCH), the UE transmits or receives a plurality of physical shared channels. May be done.

Otherwise (for example, if it does not have a predetermined UE capability), the UE receives or transmits a specific physical shared channel (for example, one physical shared channel) among a plurality of physical shared channels based on predetermined conditions. It may be controlled to do so. The predetermined condition may be at least one of the traffic priority corresponding to the physical shared channel and the processing timeline constraints.

For example, the priority of a physical shared channel (for example, URLLC) that requires low delay and high reliability may be set higher than the priority of another physical shared channel (for example, eMBB). The priority set in the physical shared channel may be defined in advance in the specifications, or may be set from the base station to the UE by higher layer signaling or the like. Further, when the first physical sharing channel scheduled for a period equal to or longer than a predetermined period after receiving the PDCCH and the second physical sharing channel scheduled for a period shorter than the predetermined period overlap, the first physical sharing It may be controlled so that the channel is transmitted and the second physically shared channel is not transmitted (for example, dropped).

Alternatively, the predetermined condition may be a scheduling type. For example, one of the physically shared channel scheduled by cross-carrier scheduling and the physically shared channel scheduled by self-carrier scheduling may be controlled to be preferentially transmitted.

In this way, when cross-carrier scheduling is applied to the primary cell, by controlling the UE monitor for the PDCCH as described above, the PDCCH can be appropriately monitored.

(Third aspect)
In the third aspect, when the secondary cell schedules the primary cell (cross-carrier scheduling is set for the primary cell), the relationship between the primary cell and the secondary cell serving as the scheduling cell will be described.

When the secondary cell schedules the physical shared channel of the primary cell, at least one of the following conditions (or restrictions or support) 1 to 4 may be set.

<Condition 1>
The secondary cell serving as the scheduling cell, and the scheduled cell and the primary cell may have at least one of the following conditions 1-1 to 1-4.

[Condition 1-1]
The secondary cell and the primary cell may be required to belong to the same cell group (for example, at least one of the MCG, SCG, and PUCCH cell groups). As a result, it is possible to prevent the cross-carrier scheduling operation from becoming complicated.

[Condition 1-2]
The secondary cell and the primary cell may be required to belong to the same Timing Advance Group (TAG). As a result, it is possible to suppress a large difference in delay between cells that perform cross-carrier scheduling (for example, a primary cell and a secondary cell).

[Condition 1-3]
The secondary cell and the primary cell may be required to apply at least one of the same numerology (eg, subcarrier spacing) and cyclic prefix (CP). As a result, it is possible to prevent the cross-carrier scheduling operation from becoming complicated.

[Condition 1-4]
The secondary cell and the primary cell may be required to use the same frequency range or be set to the same frequency range. As a result, it is possible to prevent the cross-carrier scheduling operation from becoming complicated.

<Condition 2>
Of the physical shared channels (at least one of PDSCH and PUSCH) transmitted in the primary cell, the physical shared channel to which the predetermined RNTI is applied may be cross-carrier scheduled from the secondary cell. The physical shared channel to which the predetermined RNTI is applied may be a physical shared channel scheduled by PDCCH (or DCI) which is CRC scrambled by the predetermined RNTI, or a physical shared channel which is scrambled by the predetermined RNTI. ..

The predetermined RNTI may be at least one of C-RNTI, MCS-C-RNTI, CS-RNTI, and SP-CSI-RNTI.

<Condition 3>
Support for instructing at least one of the activation and deactivation (or release) of the semi-persistent schedule (SPS) in the primary cell from the secondary cell that will be the scheduling cell (cross carrier activation / deactivation (Release)). May be done. For example, the UE may control the activation / deactivation of semi-persistent scheduling based on the DCI transmitted from the secondary cell that is the scheduling cell.

Alternatively, the setting grant-based PUSCH transmission (for example, type 2) activation and deactivation (or release) in the primary cell is instructed from the secondary cell that becomes the scheduling cell (cross carrier activation / deactivation (Release)). May be supported. For example, the UE may control the activation / deactivation of configuration grant-based PUSCH transmissions based on the DCI transmitted from the secondary cell that is the scheduling cell.

<Condition 4>
At least one of activation and deactivation (or release) of channel state information reporting in the primary cell (eg, semi-persistent CSI reporting (SPS-CSI reporting)) is instructed from the secondary cell that is the scheduling cell. That (cross carrier activation / deactivation (Release)) may be supported. For example, the UE may control the activation / deactivation of CSI reporting based on the DCI transmitted from the secondary cell that is the scheduling cell.

In this way, when scheduling the physical shared channel of the primary cell from the secondary cell, the PDCCH (or DCI) transmitted in the secondary cell is used to instruct activation / deactivation of a predetermined operation. May be good. As a result, activation / deactivation of a predetermined operation can also be instructed using PDCCH that performs cross-carrier scheduling.

(Fourth aspect)
A fourth aspect describes UE capability (eg, UE capability) for setting cross-carrier scheduling for the primary cell. The UE capability may be read as the UE capability for the PDCCH of the secondary cell that schedules the physical shared channel of the primary cell.

For a cell group that includes a primary cell and one or more secondary cells, a predetermined UE capability for the PDCCH of the secondary cell that schedules the physical shared channel of the primary cell may be defined. When a predetermined cell group including a primary cell and one or more secondary cells is set, the UE may report to the network (for example, a base station) whether or not to support the predetermined UE capability.

The predetermined UE capability may be defined for each different physical shared channel of the primary cell. For example, the UE capability for supporting the PDCCH of the secondary cell that schedules the PDSCH of the primary cell (eg, the UE capability for PDSCH) and the PDCCH of the secondary cell that schedules the PUSCH of the primary cell. UE capabilities with respect to (eg, UE capabilities for PUSCH) may be defined separately.

The UE may separately report the UE capability information for PDSCH and the UE capability information for PUSCH to the base station. In this case, only the supported UE capability information may be reported.

Further, the predetermined UE capability may be set for each frequency range (or also referred to as a frequency domain). The UE may report UE capability information for the first frequency range (eg, FR1) and UE capability information for the second frequency range (eg, FR2), respectively.

The setting of cross-carrier scheduling for the primary cell (or the PDCCH of the secondary cell that schedules the physical shared channel of the primary cell) may be supported only in a specific frequency range. If the primary cell is set to a particular frequency range, the UE may control to report predetermined UE capability information.

When the primary cell is set outside the specific frequency range, the UE does not have to report the predetermined UE capability information. The UE also determines that self-carrier scheduling is applied to the primary cell when the primary cell is set outside the specific frequency range (PDCCH scheduling the physical shared channel of the primary cell is transmitted in the primary cell). You may.

(Wireless communication system)
Hereinafter, the configuration of the wireless communication system according to the embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.

FIG. 11 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..

Further, the radio communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E). -UTRA Dual Connectivity (NE-DC)) may be included.

In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is MN, and the base station (eNB) of LTE (E-UTRA) is SN.

The wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.

The wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare. The user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).

Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2. For example, FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz). The frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

Further, the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

The plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.

The base station 10 may be connected to the core network 30 via another base station 10 or directly. The core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).

The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

In the wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, at least one of the downlink (Downlink (DL)) and the uplink (Uplink (UL)), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple. Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

The wireless access method may be called a waveform. In the wireless communication system 1, another wireless access system (for example, another single carrier transmission system, another multi-carrier transmission system) may be used as the UL and DL wireless access systems.

In the wireless communication system 1, as downlink channels, downlink shared channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), and downlink control channels (Physical Downlink Control) shared by each user terminal 20 are used. Channel (PDCCH)) and the like may be used.

Further, in the wireless communication system 1, as the uplink channel, the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), and the random access channel shared by each user terminal 20 are used. (Physical Random Access Channel (PRACH)) or the like may be used.

User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH. User data, upper layer control information, and the like may be transmitted by the PUSCH. Further, the Master Information Block (MIB) may be transmitted by the PBCH.

Lower layer control information may be transmitted by PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.

The DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. The PDSCH may be read as DL data, and the PUSCH may be read as UL data.

A control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect PDCCH. CORESET corresponds to a resource that searches for DCI. The search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates). One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. The "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. of the present disclosure may be read as each other.

Depending on the PUCCH, channel state information (Channel State Information (CSI)), delivery confirmation information (for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.) and scheduling request (Scheduling Request (for example). Uplink Control Information (UCI) including at least one of SR)) may be transmitted. The PRACH may transmit a random access preamble to establish a connection with the cell.

In this disclosure, downlinks, uplinks, etc. may be expressed without "links". Further, it may be expressed without adding "Physical" at the beginning of various channels.

In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted. In the wireless communication system 1, the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation). Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.

The synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). The signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like. In addition, SS, SSB and the like may also be called a reference signal.

Further, in the wireless communication system 1, even if a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), or the like is transmitted as an uplink reference signal (Uplink Reference Signal (UL-RS)). Good. The DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal).

(base station)
FIG. 12 is a diagram showing an example of the configuration of the base station according to the embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140. The control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.

Note that this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.

The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.

The control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like. The control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140. The control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.

The transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitter / receiver 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure. be able to.

The transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

The transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.

The transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.

The transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

The transmission / reception unit 120 (transmission processing unit 1211) processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110. RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

The transmission / reception unit 120 (transmission processing unit 1211) performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted. The base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog transform, and other transmission processing.

The transmission / reception unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..

On the other hand, the transmission / reception unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.

The transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.

The transmission / reception unit 120 (measurement unit 123) may perform measurement on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal. The measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)). , Signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like may be measured. The measurement result may be output to the control unit 110.

The transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10 and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.

The transmitting unit and the receiving unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.

The transmission / reception unit 120 may transmit information regarding the scheduling type applied to the primary cell. For example, the transmitter / receiver 120 may transmit information about one or more cells to which the downlink control channel that schedules the physical shared channel of the primary cell is transmitted.

The control unit 110 controls the cell that transmits the downlink control channel that schedules the physical shared channel of the primary cell based on the information about the scheduling type and at least one of the frequency ranges in which the physical shared channel of the primary cell is transmitted. May be good.

The control unit 110 may control at least one of the cell to which the downlink control channel (or PDCCH candidate) is transmitted and the search space type based on the cell to which the downlink control channel is transmitted.

(User terminal)
FIG. 13 is a diagram showing an example of the configuration of the user terminal according to the embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. The control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.

Note that this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.

The control unit 210 may control signal generation, mapping, and the like. The control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.

The transmission / reception unit 220 may include a baseband unit 221 and an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitter / receiver 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.

The transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmitting / receiving antenna 230 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.

The transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.

The transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

The transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.

Whether or not to apply the DFT process may be based on the transform precoding setting. When the transform precoding is enabled for a channel (for example, PUSCH), the transmission / reception unit 220 (transmission processing unit 2211) transmits the channel using the DFT-s-OFDM waveform. The DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.

The transmission / reception unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..

On the other hand, the transmission / reception unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.

The transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.

The transmission / reception unit 220 (measurement unit 223) may perform measurement on the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal. The measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement result may be output to the control unit 210.

The transmitter and receiver of the user terminal 20 in the present disclosure may be composed of at least one of the transmitter / receiver 220 and the transmitter / receiver antenna 230.

The transmitter / receiver 220 receives information about the scheduling type applied to the primary cell. For example, the transmitter / receiver 220 may receive information about one or more cells to which the downlink control channel that schedules the physical shared channel of the primary cell is transmitted.

The control unit 210 determines the cell to which the downlink control channel for scheduling the physical shared channel of the primary cell is transmitted, based on the information about the scheduling type and at least one of the frequency ranges in which the physical shared channel of the primary cell is transmitted. You may.

The cell that schedules the upstream shared channel of the primary cell and the cell that schedules the downstream shared channel of the primary cell may be set separately.

When the first scheduling type scheduled from another cell and the second scheduling type scheduled in the own cell are set for the primary cell, the first scheduling type and the second scheduling type are applied at the same time. May be done.

Alternatively, when the first scheduling type scheduled from another cell and the second scheduling type scheduled in the own cell are set for the primary cell, the first scheduling type and the second scheduling type are set. It may be switched and applied.

When a first scheduling type scheduled from another cell is set for the primary cell, the primary cell and the other cell are at least one in the same cell group, the same timing advance group, the same numerology, and the same frequency range. May be applied.

The control unit 210 may determine at least one of the cell for monitoring the downlink control channel and the search space type based on the cell to which the downlink control channel is transmitted.

For example, the control unit 210 may not be required to monitor the downlink control channel in the UE-specific search space of the primary cell (or the downlink control channel in the UE-specific search space) when the downlink control channel is transmitted in the secondary cell. You may control not to monitor). In this case, the control unit 210 may monitor the downlink control channel in the common search space of the primary cell.

Alternatively, the control unit 210 may control to monitor the downlink control channel in the primary cell and the secondary cell when the downlink control channel is transmitted in at least the secondary cell. Further, the control unit 210 may determine or assume that a plurality of downlink control channels will not be detected in at least one of the same downlink control channel monitoring occasion, the same slot, and the overlapping time domain. Alternatively, the control unit 210 detects a plurality of downlink control channels that schedule the physical shared channels of the primary cell, and when the physical shared channels scheduled for each downlink control channel are included in the predetermined range, the terminal capability and each physical unit. The physical shared channel to be transmitted may be determined based on at least one of the shared channel priorities.

(Hardware configuration)
The block diagram used in the description of the above embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Here, the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like. As described above, the method of realizing each of them is not particularly limited.

For example, the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 14 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment. The base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..

In this disclosure, the terms of devices, circuits, devices, sections, units, etc. can be read as each other. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is shown, there may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors. The processor 1001 may be mounted by one or more chips.

For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), and the like may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.

The memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, and is, for example, a flexible disc, a floppy (registered trademark) disc, an optical magnetic disc (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disc, etc.). At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of. The storage 1003 may be referred to as an auxiliary storage device.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include. For example, the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.

Further, the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Modification example)
The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols and signals (signals or signaling) may be read interchangeably. Also, the signal may be a message. The reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard. Further, the component carrier (Component Carrier (CC)) may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

The wireless frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe. Further, the subframe may be composed of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.

Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel. Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration. , A specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.

The slot may be composed of one or more symbols in the time domain (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.). In addition, the slot may be a time unit based on numerology.

The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. The mini-slot may also be referred to as a sub-slot. A minislot may consist of a smaller number of symbols than the slot. A PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each. The time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.

For example, one subframe may be called TTI, a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units. The definition of TTI is not limited to this.

The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

A resource block (Resource Block (RB)) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.

Further, the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth, etc.) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

The BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

Note that the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples. For example, the number of subframes contained in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.

The names used for parameters, etc. in this disclosure are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting in any way. ..

The information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

In addition, information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers. Information, signals, etc. may be input / output via a plurality of network nodes.

Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

The notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method. For example, the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), etc.), medium access control (MAC) signaling), other signals or combinations thereof May be carried out by.

Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Further, the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like. Further, MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).

In addition, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).

The determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The terms "system" and "network" used in this disclosure may be used interchangeably. The "network" may mean a device (eg, a base station) included in the network.

In the present disclosure, "precoding", "precoder", "weight (precoding weight)", "pseudo-colocation (Quasi-Co-Location (QCL))", "Transmission Configuration Indication state (TCI state)", "space". "Spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel" are compatible. Can be used for

In the present disclosure, "base station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission point (Transmission Point (TP))", "Reception point (Reception Point (RP))", "Transmission / reception point (Transmission / Reception Point (TRP))", "Panel" , "Cell", "sector", "cell group", "carrier", "component carrier" and the like can be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)). Communication services can also be provided by Head (RRH))). The term "cell" or "sector" refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.

In this disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" are used interchangeably. Can be done.

Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read by the user terminal. For example, the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the user terminal 20 may have the function of the base station 10 described above. In addition, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, and the like may be read as a side channel.

Similarly, the user terminal in the present disclosure may be read as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

In the present disclosure, the operation performed by the base station may be performed by its upper node (upper node) in some cases. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,). Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

Each aspect / embodiment described in the present disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), LTE 802. 20, Ultra-WideBand (UWB), Bluetooth®, other systems that utilize suitable wireless communication methods, next-generation systems extended based on these, and the like. In addition, a plurality of systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

Any reference to elements using designations such as "first", "second", etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.

The term "determining" used in this disclosure may include a wide variety of actions. For example, "judgment (decision)" means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment".

In addition, "judgment (decision)" includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as "judgment (decision)" such as "accessing" (for example, accessing data in memory).

In addition, "judgment (decision)" is regarded as "judgment (decision)" of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, "judgment (decision)" may be regarded as "judgment (decision)" of some action.

In addition, "judgment (decision)" may be read as "assuming", "expecting", "considering", and the like. Further, "assuming" may be read as "applying".

The terms "connected", "coupled", or any variation thereof, as used herein, are any direct or indirect connection or connection between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are "connected" or "joined" to each other. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access".

In the present disclosure, when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-comprehensive examples, the radio frequency domain, microwaves. It can be considered to be "connected" or "coupled" to each other using frequency, electromagnetic energy having wavelengths in the light (both visible and invisible) regions, and the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Furthermore, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include that the nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as an amended or modified mode without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for purposes of illustration and does not bring any limiting meaning to the invention according to the present disclosure.

Claims (6)

1. A receiver that receives information about the scheduling type applied to the primary cell, and
   A control unit that determines the cell to which the downlink control channel that schedules the physical shared channel of the primary cell is transmitted based on the information about the scheduling type and at least one of the frequency ranges in which the physical shared channel of the primary cell is transmitted. And, a terminal characterized by having.
2. The terminal according to claim 1, wherein the cell that schedules the uplink shared channel of the primary cell and the cell that schedules the downlink shared channel of the primary cell are set separately.
3. When the first scheduling type scheduled from another cell and the second scheduling type scheduled in the own cell are set for the primary cell, the first scheduling type and the second scheduling type The terminal according to claim 1 or 2, wherein is applied at the same time.
4. When the first scheduling type scheduled from another cell and the second scheduling type scheduled in the own cell are set for the primary cell, the first scheduling type and the second scheduling type The terminal according to claim 1 or 2, wherein the terminal is switched and applied.
5. When a first scheduling type scheduled from another cell is set for the primary cell, the primary cell and the other cell have the same cell group, the same timing advance group, the same numerology, and the same frequency range. The terminal according to any one of claims 1 to 4, wherein at least one of the above is applied.
6. The process of receiving information about the scheduling type applied to the primary cell, and
   Based on the information about the scheduling type and at least one of the frequency ranges in which the physical shared channel of the primary cell is transmitted, the step of determining the cell to which the downlink control channel that schedules the physical shared channel of the primary cell is transmitted. , A wireless communication method characterized by having.

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