WO2023053431A1 - Terminal and communication method - Google Patents

Abstract

This terminal includes: a reception unit that receives downlink data which is subjected to scheduling by Semi-Persistent Scheduling (SPS); and a control unit that controls confirmation response feedback, taking into account the relationship between carrier switching which is applied to a channel in which the confirmation response for the downlink data is disposed and a delay of the confirmation response which will not be made valid at the same time as the carrier switching.

Description

Terminal and communication method

The present invention relates to a terminal and communication method in a wireless communication system.

In the 3GPP (3rd Generation Partnership Project), 5G or NR (New Radio) and NR (New Radio) are being used in order to further increase the system capacity, further increase the data transmission speed, and further reduce the delay in the wireless section. A radio communication system called "NR" (the radio communication system is hereinafter referred to as "NR") is under study. In 5G, various radio technologies and network architectures are being studied in order to meet the requirements of realizing a throughput of 10 Gbps or more and keeping the delay in the radio section to 1 ms or less (for example, Non-Patent Document 1).

Furthermore, in the 3GPP standardization, PUCCH (Physical Uplink Control Channel) carrier switching is being considered for extension of URLLC (Ultra-Reliable and Low Latency Communications) technology. PUCCH carrier switching is being studied as a method of reducing HARQ-ACK (Hybrid Automatic Repeat reQuest-ACKnowledgement) feedback latency in a TDD (Time Division Duplex) scheme (eg, Non-Patent Document 2).

In addition, in NR, PDSCH (Physical Downlink Shared Channel) resources are set in advance in the terminal, and downlink SPS (Semi-Persistent Scheduling) that performs activation/release with DCI (Downlink Control Information) is specified. , thereby enabling low-delay data reception (for example, Non-Patent Document 3 and Non-Patent Document 4).

When PDSCH by SPS is scheduled for a plurality of consecutive DL (Downlink) slots, acknowledgment corresponding to the PDSCH reception (for example, HARQ-ACK (Hybrid automatic repeat request Acknowledgement)) PUCCH for transmitting ( Physical Uplink Control Channel) may collide with DL symbols or flexible symbols. When this collision occurs, the transmission of that HARQ-ACK may be deferred. In the following, PDSCH based on SPS may be described as SPS PDSCH, and acknowledgment to SPS PDSCH may be described as SPS HARQ-ACK.

In addition, 3GPP is considering PUCCH carrier switching for HARQ-ACK feedback and the like.

Considering the relationship between PUCCH carrier switching and the postponement of SPS HARQ-ACK, there is room for consideration of HARQ-ACK feedback.

The purpose of the present invention is to appropriately feed back HARQ-ACK by considering the relationship between PUCCH carrier switching and SPS HARQ-ACK postponement.

According to the disclosed technique, a receiving unit that receives downlink data scheduled by SPS (Semi-Persistent Scheduling), carrier switching applied to a channel in which an acknowledgment for the downlink data is arranged, and the carrier switching and a control unit for controlling the feedback of said acknowledgments in relation to the deferment of said acknowledgments which are not valid at the same time.

According to the disclosed technique, a terminal receives downlink data scheduled by SPS (Semi-Persistent Scheduling), carrier switching applied to a channel in which an acknowledgment for the downlink data is arranged, and the carrier switching A communication method is provided that controls the feedback of the acknowledgment in relation to the deferral of the acknowledgment that is not valid at the same time.

1 is a diagram for explaining an example (1) of a wireless communication system according to an embodiment of the present invention; FIG. FIG. 2 is a diagram for explaining example (2) of a wireless communication system according to an embodiment of the present invention; FIG. 4 is a diagram showing an example (1) of PUCCH carrier switching; FIG. 10 is a diagram showing an example (2) of PUCCH carrier switching; FIG. 4 is a diagram showing an example of HARQ-ACK deferral according to an embodiment of the present invention; 4 is a flow chart showing an example (1) of UCI transmission according to the embodiment of the present invention; FIG. 10 is a flow chart showing an example (2) of UCI transmission according to the embodiment of the present invention; FIG. FIG. 10 is a flow chart showing an example (3) of UCI transmission according to the embodiment of the present invention; FIG. FIG. 10 is a flow chart showing an example (4) of UCI transmission according to the embodiment of the present invention; FIG. FIG. 10 is a flow chart showing an example (5) of UCI transmission according to the embodiment of the present invention; FIG. FIG. 10 is a flowchart showing an example (6) of UCI transmission in the embodiment of the present invention; FIG. It is a figure which shows the example of UCI multiplexing in embodiment of this invention. It is a figure showing an example of functional composition of base station 10 in an embodiment of the invention. 2 is a diagram showing an example of the functional configuration of terminal 20 according to the embodiment of the present invention; FIG. 2 is a diagram showing an example of hardware configuration of base station 10 or terminal 20 according to an embodiment of the present invention; FIG. It is a figure showing an example of composition of vehicles 2001 in an embodiment of the invention.

Embodiments of the present invention will be described below with reference to the drawings. In addition, the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

For the operation of the wireless communication system according to the embodiment of the present invention, existing technology may be used as appropriate. The existing technology is, for example, existing NR or LTE, but is not limited to existing NR or LTE.

FIG. 1 is a diagram for explaining example (1) of a wireless communication system according to an embodiment of the present invention. A wireless communication system according to an embodiment of the present invention includes a base station 10 and terminals 20, as shown in FIG. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example and there may be more than one.

The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. A physical resource of a radio signal is defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. Also, a TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.

The base station 10 can perform carrier aggregation in which multiple cells (multiple CCs (component carriers)) are bundled and communicated with the terminal 20 . In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used.

The base station 10 transmits a synchronization signal, system information, etc. to the terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is transmitted, for example, on NR-PBCH or PDSCH, and is also called broadcast information. As shown in FIG. 1, the base station 10 transmits control signals or data to the terminal 20 on DL (Downlink) and receives control signals or data from the terminal 20 on UL (Uplink). Here, what is transmitted on control channels such as PUCCH and PDCCH is called a control signal, and what is transmitted on a shared channel such as PUSCH and PDSCH is called data. is.

The terminal 20 is a communication device with a wireless communication function, such as a smartphone, mobile phone, tablet, wearable terminal, or M2M (Machine-to-Machine) communication module. As shown in FIG. 1 , the terminal 20 receives control signals or data from the base station 10 on the DL and transmits control signals or data to the base station 10 on the UL, thereby performing various functions provided by the wireless communication system. Use communication services. Note that the terminal 20 may be called UE, and the base station 10 may be called gNB.

FIG. 2 is a diagram for explaining example (2) of the wireless communication system according to the embodiment of the present invention. FIG. 2 shows a configuration example of a radio communication system when dual connectivity (DC) is performed. As shown in FIG. 2, a base station 10A serving as a master node (MN: Master Node) and a base station 10B serving as a secondary node (SN: Secondary Node) are provided. The base station 10A and the base station 10B are connected to the core network 30 respectively. Terminal 20 can communicate with both base station 10A and base station 10B.

A cell group provided by the base station 10A, which is the MN, is called a master cell group (MCG), and a cell group provided by the base station 10B, which is the SN, is called a secondary cell group (SCG). call. In dual connectivity, an MCG is composed of one PCell and 0 or more SCells, and an SCG is composed of one PSCell (Primary SCG Cell) and 0 or more SCells.

Note that dual connectivity may be a communication method using two communication standards, and any communication standards may be combined. For example, the combination may be either NR and 6G standard or LTE and 6G standard. Also, dual connectivity may be a communication method using three or more communication standards, and may be called by other names different from dual connectivity.

The processing operations in the present embodiment may be executed in the system configuration shown in FIG. 1, may be executed in the system configuration shown in FIG. 2, or may be executed in a system configuration other than these. .

　In 3GPP standardization, support for enhanced IoT (Internet of Things) and URLLC (Ultra-reliable and low latency communication) in NR is being considered. Furthermore, in order to meet the requirements of URLLC, enhancement of HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment) feedback is under consideration.

FIG. 3 is a diagram showing an example (1) of PUCCH carrier switching. PUCCH carrier switching is being considered for HARQ-ACK feedback. As shown in FIG. 3, in cell 1 where PUCCH is transmitted, when HARQ-ACK corresponding to PDSCH at timing T1 is transmitted at PUCCH at timing T2 less than the K1 value, timing T2 in cell 1 is DL Therefore, the K1 value is exceeded at timing T3 when cell 1 becomes UL. Therefore, PUCCH is transmitted in cell 2 whose timing T2 is UL. Note that the K1 value may be a parameter indicating the number of slots from the slot in which data is scheduled on the PDSCH to the slot in which feedback information (eg, HARQ-ACK) for that PDSCH is transmitted. The K1 value may also be referred to as a slot offset value or the like.

Intra-UE multiplexing of UCI (Uplink Control Information) including HARQ-ACK is semi-static DL symbol, SSB (SS / PBCH block) symbol and UL due to collision with SFI (Slot Format Indication) Executed before channel cancellation.

Here, PUCCH carrier switching is supported based on a semi-static configuration, and based on predetermined rules conditional on the terminal 20 colliding with PUCCH resources and invalid symbols (e.g., semi-static DL or SSB symbols) When determining the PUCCH carrier, the execution order of PUCCH carrier switching and intra-UE multiplexing affects the UL transmission result.

FIG. 4 is a diagram showing an example (2) of PUCCH carrier switching. If intra-UE multiplexing is performed prior to PUCCH carrier switching, HARQ-ACK is transmitted in DG (Dynamic grant)-PUSCH in the PUSCH cell in the example of FIG. On the other hand, when PUCCH carrier switching is performed before intra-UE multiplexing, in the example of FIG. 4, it is determined that HARQ-ACK is transmitted in PUCCH of the PUCCH candidate cell, and further intra-UE multiplexing in the PUSCH cell HARQ-ACK is transmitted on CG (Configured grant)-PUSCH.

Regarding PUCCH carrier switching, the methods shown in Method 1)-Method 3) below may be applied.

Method 1) Perform PUCCH carrier switching based on dynamic signaling by DCI. Hereinafter, this PUCCH carrier switching is also referred to as dynamic PUCCH carrier switching.
Method 2) Perform PUCCH carrier switching based on a predetermined semi-static rule. Hereinafter, this PUCCH carrier switching is also referred to as semi-static PUCCH carrier switching.
Method 3) Perform PUCCH carrier switching based on the PUCCH cell timing pattern configured by RRC in the applicable PUCCH cell.

Note that method 1 and method 2 may be performed, or method 1 and method 3 may be performed.

Here, when PDSCH by SPS is scheduled for a plurality of consecutive DL slots, PUCCH for transmitting HARQ-ACK corresponding to the PDSCH reception may collide with DL symbols or flexible symbols. . When PUCCH collides with DL symbols or flexible symbols, the transmission of that HARQ-ACK may be deferred.

The terminal 20 needs to decide whether to enable the above PUCCH carrier switching and the above SPS HARQ-ACK postponement at the same time.

(alternation 1)
Alternation 1 describes the case where PUCCH carrier switching and deferral of SPS HARQ-ACK are enabled simultaneously.

When PUCCH carrier switching and SPS HARQ-ACK deferral are enabled at the same time, it is assumed that the situations shown in 1)-3) below will occur.

1) When the SCS (SubCarrier Spacing) of the target cell to which the PUCCH carrier switching destination is different from that of the PCell, PSCell or PUCCH-SCell, a predetermined procedure is required to postpone the SPS HARQ-ACK.
2) It needs to decide whether to perform PUCCH carrier switching or SPS HARQ-ACK deferral first.
3) PUCCH carrier switching and SPS HARQ-ACK deferral should be performed with multiplexing considerations.

For example, in the prior art, intra-UE multiplexing at the same priority may be performed in the following order.

1) Multiplexing of SPS HARQ-ACK and dynamic HARQ-ACK 2) Multiplexing of HARQ-ACK and other UCI 3) Multiplexing of UCI and PUSCH

FIG. 5 is a diagram showing an example of HARQ-ACK postponement in the embodiment of the present invention. If the SCS of the target cell to which PUCCH carrier switching is to be switched is greater than the SCS of PCell, PSCell or PUCCH-SCell, the following two types of SPS HARQ-ACK deferrals may be performed. Note that the target cell may be mapped to the reporting timing of SPS HARQ-ACK based on the PUCCH cell pattern.

The first SPS HARQ-ACK deferral is an "inter K1 deferral" that increases the K1 value in the PCell, PSCell or PUCCH-SCell. As shown in FIG. 5, for example, in PCell, HARQ-ACK corresponding to SPS-PDSCH collides with the DL symbol of SCell #2 specified in the PUCCH cell pattern, and transmission is performed in the next slot as K1_eff=K1+1. Postponed. This postponement is called an inter-K1 postponement.

The second SPS HARQ-ACK deferral is "intra K1 deferral" that defers in multiple slots of the target SCell mapped to one slot of the PCell, PSCell or PUCCH-SCell without increasing the K1 value. . As shown in FIG. 5, in SCell#1 designated by the PUCCH cell pattern, transmission is postponed to the UL slot among two slots mapped to one slot of PCell corresponding to K1_eff. This postponement is referred to as an intra K1 postponement.

Intra K1 deferral can be performed before applying further inter K1 deferral if there are unconfirmed slots in the target cell corresponding to the current K1 value.

As operations when PUCCH carrier switching and SPS HARQ-ACK postponement are enabled at the same time, each operation shown in 1)-3) below may be performed. Multiplexing case 1 below is a case in which SPS HARQ-ACK is multiplexed with dynamic HARQ-ACK. Multiplexing case 2 is a case where SPS HARQ-ACK is multiplexed with other UCIs (eg SR, CSI, etc.). Multiplexing case 3 is a case where SPS HARQ-ACK is multiplexed with PUSCH.

1) PUCCH carrier switching may be performed prior to deferring SPS HARQ-ACK.

2) Multiplexing may or may not be performed before PUCCH carrier switching. Option 1)-Option 5) shown below may be applied.

Option 1) Multiplexing case 1, multiplexing case 2 and multiplexing case 3 may be verified and/or performed before PUCCH carrier switching.
Option 2) Multiplexing case 1 and multiplexing case 2 may be checked and/or performed before PUCCH carrier switching.
Option 3) Multiplexing Case 1 may be checked and/or performed before PUCCH carrier switching.
Option 4) Multiplexing case 2 may be checked and/or performed before PUCCH carrier switching.
Option 5) Multiplexing may not be confirmed and/or performed before PUCCH carrier switching.

3) Multiplexing may or may not be performed prior to SPS HARQ-ACK deferral. Option A)-Option E) shown below may be applied.

Option A) Multiplexing case 1, multiplexing case 2 and multiplexing case 3 may be checked and/or performed before deferral of SPS HARQ-ACK.
Option B) Multiplexing case 1 and multiplexing case 2 may be checked and/or performed before deferral of SPS HARQ-ACK.
Option C) Multiplexing Case 1 may be checked and/or performed before deferral of SPS HARQ-ACK.
Option D) Multiplexing Case 2 may be checked and/or performed before deferral of SPS HARQ-ACK.
Option E) Multiplexing may not be acknowledged and/or performed before deferral of SPS HARQ-ACK.

FIG. 6 is a flowchart showing an example (1) of UCI transmission according to the embodiment of the present invention. FIG. 7 is a flow chart showing an example (2) of UCI transmission according to the embodiment of the present invention. An example of UCI transmission to which option 1 and option A are applied will be described with reference to FIGS. 6 and 7. FIG.

In step S101, the terminal 20 receives the SPS-PDSCH. In subsequent step S102, the terminal 20 determines the K1 value based on the PCell or the SCell notified by the activated DCI. In subsequent step S103, the terminal 20 determines the slot of the PCell for SPS HARQ-ACK reporting.

In subsequent step S104, the terminal 20 determines whether the SPS HARQ-ACK overlaps with the dynamic HARQ-ACK. If there is no overlap (NO in S104), the process proceeds to step S105, and if there is overlap (YES in S104), the process proceeds to step S106. In step S106, the terminal 20 multiplexes the SPS HARQ-ACK with the dynamic HARQ-ACK and transmits it to the base station 10. Note that the overlap may be overlapping with each other in the time domain.

In step S105, the terminal 20 determines whether the SPS HARQ-ACK overlaps with other UCI. If they do not overlap (NO in S105), the process proceeds to step S107, and if they overlap (YES in S105), the process proceeds to step S108.

In step S107, the terminal 20 determines whether the SPS HARQ-ACK overlaps with the PUSCH. If they do not overlap (NO in S107), the process proceeds to step S109, and if they overlap (YES in S107), the process proceeds to step S110. In step S110, the terminal 20 multiplexes SPS HARQ-ACK on PUSCH and transmits it to the base station 10. FIG.

In step S108, the terminal 20 multiplexes the SPS HARQ-ACK with other UCIs. In subsequent step S111, the terminal 20 determines whether the PUCCH overlaps with the PUSCH. If they do not overlap (NO in S111), the process proceeds to step S112, and if they overlap (YES in S111), the process proceeds to step S113. In step S<b>113 , the terminal 20 multiplexes the UCI onto the PUSCH and transmits it to the base station 10 .

In step S109, the terminal 20 determines the PUCCH resource of the target PUCCH cell based on the semi-static pattern as PUCCH carrier switching, and proceeds to step S114 in FIG.

In step S112, the terminal 20 determines the PUCCH resource of the target PUCCH cell if PUCCH carrier switching is supported for the multiplexed PUCCH, and proceeds to step S114 in FIG.

Note that in steps S109 and S112, if PUCCH carrier switching is not performed, the K1 value may be increased and the process may proceed to step S103. That is, an inter-K1 postponement may be executed.

In step S114, the terminal 20 determines whether the SPS HARQ-ACK overlaps with the dynamic HARQ-ACK. If they do not overlap (NO in S114), the process proceeds to step S115, and if they overlap (YES in S114), the process proceeds to step S116. In step S116, the terminal 20 multiplexes the SPS HARQ-ACK with the dynamic HARQ-ACK and transmits it to the base station 10.

In step S115, the terminal 20 determines whether the SPS HARQ-ACK overlaps with other UCI. If they do not overlap (NO in S115), the process proceeds to step S117, and if they overlap (YES in S115), the process proceeds to step S118.

In step S117, the terminal 20 determines whether the SPS HARQ-ACK overlaps with the PUSCH. If they do not overlap (NO in S117), the process proceeds to step S119, and if they overlap (YES in S117), the process proceeds to step S120. In step S120, the terminal 20 multiplexes the SPS HARQ-ACK on the PUSCH and transmits it to the base station 10.

In step S118, the terminal 20 multiplexes the SPS HARQ-ACK with other UCIs. In subsequent step S121, the terminal 20 determines whether the PUCCH overlaps with the PUSCH. If they do not overlap (NO in S121), the process proceeds to step S124, and if they overlap (YES in S121), the process proceeds to step S125. In step S<b>125 , the terminal 20 multiplexes the UCI onto the PUSCH and transmits it to the base station 10 .

In step S119, the terminal 20 determines whether or not the PUCCH resource and the invalid symbol overlap. If they overlap (YES in S119), the process proceeds to step S122, and if they do not overlap (NO in S119), the process proceeds to step S123. In step S123, PUCCH resources are determined in the target cell.

In step S124, the terminal 20 determines whether or not the PUCCH resource and the invalid symbol overlap. If they overlap (YES in S124), the process proceeds to step S127, and if they do not overlap (NO in S124), the process proceeds to step S123. In step S127, the terminal 20 either drops the PUCCH and ends, or proceeds to step S122 to postpone the SPS HARQ-ACK. That is, deferral of the SPS HARQ-ACK may or may not be performed if the SPS HARQ-ACK is already multiplexed with other UCIs.

In step S122, the terminal 20 determines whether intra K1 postponement is applicable. If intra K1 deferral is applicable, eg, if there is an unconfirmed slot corresponding to the current K1 value in the target cell (YES in S122), perform intra K1 deferral and go to step S114. If intra K1 deferral is not applicable, eg if there is no unconfirmed slot in the target cell corresponding to the current K1 value (NO in S122), proceed to step S126.

In step S126, if the maximum postponement limit is not exceeded, the terminal 20 increases K1 to perform inter K1 postponement, and proceeds to step S103 in FIG. Note that the maximum postponement limit is the maximum permissible threshold for SPS HARQ-ACK postponement. Terminal 20 may be notified of the maximum deferral limit by RRC.

FIG. 8 is a flowchart showing an example (3) of UCI transmission according to the embodiment of the present invention. An example of UCI transmission to which option 1 and option B are applied will be described with reference to FIGS. 6 and 8. FIG.

　In FIG. 6, steps other than steps S109 and S112 are the same as those in FIG.

In step S109, the terminal 20 determines the PUCCH resource of the target PUCCH cell based on the semi-static pattern as PUCCH carrier switching, and proceeds to step S201 in FIG.

In step S112, the terminal 20 determines the PUCCH resource of the target PUCCH cell if PUCCH carrier switching is supported for the multiplexed PUCCH, and proceeds to step S201 in FIG.

In step S201, the terminal 20 determines whether the SPS HARQ-ACK overlaps with the dynamic HARQ-ACK. If they do not overlap (NO in S201), the process proceeds to step S202, and if they overlap (YES in S201), the process proceeds to step S203. In step S203, the terminal 20 multiplexes the SPS HARQ-ACK with the dynamic HARQ-ACK and transmits to the base station 10.

In step S202, the terminal 20 determines whether the SPS HARQ-ACK overlaps with other UCI. If they do not overlap (NO in S202), the process proceeds to step S204, and if they overlap (YES in S202), the process proceeds to step S205.

In step S204, the terminal 20 determines whether or not the PUCCH resource and the invalid symbol overlap. If overlapped (YES in S204), proceed to step S206. If not overlapped (NO in S204), proceed to step S207. In step S207, PUCCH resources are determined in the target cell.

In step S205, the terminal 20 multiplexes the SPS HARQ-ACK with other UCIs. In subsequent step S208, the terminal 20 determines whether or not the PUCCH resource and the invalid symbol overlap. If they overlap (YES in S208), the process proceeds to step S210, and if they do not overlap (NO in S208), the process proceeds to step S207. In step S210, the terminal 20 either drops the PUCCH and ends, or proceeds to step S206 to postpone the SPS HARQ-ACK. That is, deferral of the SPS HARQ-ACK may or may not be performed if the SPS HARQ-ACK is already multiplexed with other UCIs.

In step S206, the terminal 20 determines whether intra K1 postponement is applicable. If intra K1 deferral is applicable, eg, if there is an unconfirmed slot corresponding to the current K1 value in the target cell (YES in S206), perform intra K1 deferral and go to step S201. If intra K1 deferral is not applicable, eg if there is no unconfirmed slot corresponding to the current K1 value in the target cell (NO in S206), proceed to step S209.

In step S209, if the maximum postponement limit is not exceeded, the terminal 20 increases K1 to perform inter K1 postponement, and proceeds to step S103 in FIG.

FIG. 9 is a flowchart showing an example (4) of UCI transmission according to the embodiment of the present invention. An example of UCI transmission to which option 1 and option C are applied will be described with reference to FIGS. 6 and 9. FIG.

　In FIG. 6, steps other than steps S109 and S112 are the same as those in FIG.

In step S109, the terminal 20 determines the PUCCH resource of the target PUCCH cell based on the semi-static pattern as PUCCH carrier switching, and proceeds to step S301 in FIG.

In step S112, if PUCCH carrier switching is supported for the multiplexed PUCCH, the terminal 20 determines PUCCH resources for the target PUCCH cell, and proceeds to step S301 in FIG.

In step S301, the terminal 20 determines whether the SPS HARQ-ACK overlaps with the dynamic HARQ-ACK. If they do not overlap (NO in S301), the process proceeds to step S302, and if they overlap (YES in S301), the process proceeds to step S303. In step S303, the terminal 20 multiplexes the SPS HARQ-ACK with the dynamic HARQ-ACK and transmits to the base station 10.

In step S302, the terminal 20 determines whether or not the PUCCH resource and the invalid symbol overlap. If they overlap (YES in S302), the process proceeds to step S304, and if they do not overlap (NO in S302), the process proceeds to step S305. In step S305, PUCCH resources are determined in the target cell.

In step S304, the terminal 20 determines whether intra K1 postponement is applicable. If intra K1 deferral is applicable, eg, if there is an unconfirmed slot corresponding to the current K1 value in the target cell (YES in S304), perform intra K1 deferral and go to step S301. If intra K1 deferral is not applicable, eg if there is no unconfirmed slot corresponding to the current K1 value in the target cell (NO in S304), proceed to step S306.

In step S306, if the maximum postponement limit is not exceeded, the terminal 20 increases K1 to perform inter K1 postponement, and proceeds to step S103 in FIG.

FIG. 10 is a flowchart showing an example (5) of UCI transmission according to the embodiment of the present invention. An example of UCI transmission to which option 1 and option D are applied will be described with reference to FIGS. 6 and 10. FIG.

　In FIG. 6, steps other than steps S109 and S112 are the same as those in FIG.

In step S109, the terminal 20 determines the PUCCH resource of the target PUCCH cell based on the semi-static pattern as PUCCH carrier switching, and proceeds to step S401 in FIG.

In step S112, the terminal 20 determines the PUCCH resource of the target PUCCH cell if PUCCH carrier switching is supported for the multiplexed PUCCH, and proceeds to step S401 in FIG.

In step S401, the terminal 20 determines whether or not the SPS HARQ-ACK overlaps with another UCI. If they do not overlap (NO in S401), the process proceeds to step S402, and if they overlap (YES in S401), the process proceeds to step S403.

In step S402, the terminal 20 determines whether or not the PUCCH resource and the invalid symbol overlap. If overlapped (YES in S402), proceed to step S404; if not overlapped (NO in S204), proceed to step S405. In step S405, PUCCH resources are determined in the target cell.

In step S403, the terminal 20 multiplexes the SPS HARQ-ACK with other UCIs. In subsequent step S406, the terminal 20 determines whether or not the PUCCH resource and the invalid symbol overlap. If overlapped (YES in S406), proceed to step S408; if not overlapped (NO in S406), proceed to step S405. In step S408, the terminal 20 either drops the PUCCH and ends, or proceeds to step S404 to postpone the SPS HARQ-ACK. That is, deferral of the SPS HARQ-ACK may or may not be performed if the SPS HARQ-ACK is already multiplexed with other UCIs.

In step S404, the terminal 20 determines whether intra K1 postponement is applicable. If intra K1 deferral is applicable, eg, if there is an unconfirmed slot corresponding to the current K1 value in the target cell (YES in S404), perform intra K1 deferral and go to step S401. If intra K1 deferral is not applicable, eg if there is no unconfirmed slot corresponding to the current K1 value in the target cell (NO in S404), proceed to step S407.

In step S407, if the maximum postponement limit is not exceeded, the terminal 20 increases K1 to perform inter K1 postponement, and proceeds to step S103 in FIG.

FIG. 11 is a flow chart showing an example (6) of UCI transmission according to the embodiment of the present invention. An example of UCI transmission to which Option 1 and Option E are applied will be described with reference to FIGS. 6 and 11. FIG.

　In FIG. 6, steps other than steps S109 and S112 are the same as those in FIG.

In step S109, the terminal 20 determines the PUCCH resource of the target PUCCH cell based on the semi-static pattern as PUCCH carrier switching, and proceeds to step S501 in FIG.

In step S112, the terminal 20 determines the PUCCH resource of the target PUCCH cell if PUCCH carrier switching is supported for the multiplexed PUCCH, and proceeds to step S501 in FIG.

In step S501, the terminal 20 determines whether or not PUCCH resources and invalid symbols overlap. If overlapped (YES in S501), the process proceeds to step S502, and if not overlapped (NO in S501), the process proceeds to step S503. In step S503, PUCCH resources are determined in the target cell.

In step S502, the terminal 20 determines whether intra K1 postponement is applicable. If intra K1 deferral is applicable, eg, if there is an unconfirmed slot corresponding to the current K1 value in the target cell (YES in S502), perform intra K1 deferral and go to step S501. If intra K1 deferral is not applicable, eg if there is no unconfirmed slot in the target cell corresponding to the current K1 value (NO in S502), proceed to step S504.

In step S504, if the maximum postponement limit is not exceeded, the terminal 20 increases K1 to perform inter K1 postponement, and proceeds to step S103 in FIG.

Also, the terminal 20 may perform UCI transmission to which option 2 and option A are applied. Terminal 20 may perform UCI transmission with Option 2 and Option B applied. Terminal 20 may perform UCI transmission with option 2 and option C applied. Terminal 20 may perform UCI transmission with option 2 and option D applied. Terminal 20 may perform UCI transmission with option 2 and option E applied.

Also, the terminal 20 may perform UCI transmission to which option 3 and option A are applied. Terminal 20 may perform UCI transmission with option 3 and option B applied. Terminal 20 may perform UCI transmission with option 3 and option C applied. Terminal 20 may perform UCI transmission with option 3 and option D applied. Terminal 20 may perform UCI transmission with option 3 and option E applied.

Also, the terminal 20 may perform UCI transmission to which option 4 and option A are applied. Terminal 20 may perform UCI transmission with Option 4 and Option B applied. Terminal 20 may perform UCI transmission with option 4 and option C applied. Terminal 20 may perform UCI transmission with option 4 and option D applied. Terminal 20 may perform UCI transmission with option 4 and option E applied.

Also, the terminal 20 may perform UCI transmission to which option 5 and option A are applied. Terminal 20 may perform UCI transmission with option 5 and option B applied. Terminal 20 may perform UCI transmission with option 5 and option C applied. Terminal 20 may perform UCI transmission with option 5 and option D applied. Terminal 20 may perform UCI transmission with option 5 and option E applied.

FIG. 12 is a diagram showing an example of UCI multiplexing according to the embodiment of the present invention. For example, for ease of implementation, it may only be assumed whether to perform dynamic HARQ-ACK and SPS HARQ-ACK multiplexing, as shown in FIG. For example, dynamic HARQ-ACK and SPS HARQ-ACK may be multiplexed before performing PUCCH carrier switching, and dynamic HARQ-ACK and SPS HARQ-ACK may be multiplexed before performing SPS HARQ-ACK deferral. May be multiplexed.

For example, in FIG. 12, SPS HARQ-ACK may be multiplexed with dynamic HARQ-ACK on the PUCCH resource of slot #n+2 of SCell#1.

For example, dynamic HARQ-ACK and SPS HARQ-ACK may not be multiplexed before performing PUCCH carrier switching, and dynamic HARQ-ACK and SPS HARQ-ACK may not be multiplexed before performing SPS HARQ-ACK deferral. may not be multiplexed.

For example, in FIG. 12, SPS HARQ-ACK may be multiplexed with dynamic HARQ-ACK on the PUCCH resource of slot #n+3 of PCell. In other words, dynamic HARQ-ACK and SPS HARQ-ACK may be multiplexed after SPS HARQ-ACK is postponed.

(Alternation 2)
Alternation 2 describes the case where SPS HARQ-ACK deferral and PUCCH carrier switching are not performed simultaneously.

(Alternation 2-1)
Alternation 2-1 describes the case where SPS HARQ-ACK deferral and semi-static PUCCH carrier switching are not performed simultaneously.

(Option 1)
In Option 1, the terminal 20 does not assume that SPS HARQ-ACK deferral is enabled in any SPS Configuration and at the same time semi-static PUCCH carrier switching is enabled. Here, "enable" corresponds to "enable". Note that Option 1 assumes that SPS HARQ-ACK deferral and semi-static PUCCH carrier switching are configured at the same time, but may not be enabled at the same time.

In this case, the base station 10 enables/disables SPS HARQ-ACK deferral or enables/disables semi-static PUCCH carrier switching so that SPS HARQ-ACK deferral and semi-static PUCCH carrier switching are not enabled at the same time. etc.

(Option 2)
Option 2 allows SPS HARQ-ACK deferral to be enabled in any SPS configuration and at the same time semi-static PUCCH carrier switching to be enabled, but SPS HARQ-ACK deferral and semi-static PUCCH carrier switching only one function of is applied. There are two sub-options of Option 2:

(Option 2-1)
In option 2-1 no SPS HARQ-ACK deferral is applied and semi-static PUCCH carrier switching is applied.

In this case, terminal 20 determines the target PUCCH cell according to the rules of semi-static PUCCH carrier switching.

Also, the terminal 20 multiplexes the deferred SPS HARQ-ACK and the dynamic HARQ-ACK or other UCI before or after executing semi-static PUCCH carrier switching. Note that dynamic HARQ-ACK may or may not be accompanied by notification of dynamic PUCCH carriers.

Note that the determined PUCCH resource on the target PUCCH cell for SPS HARQ-ACK uses SPS-PUCCH-AN-List or n1PUCCH-AN, and the PUCCH resource on the target PUCCH cell is an invalid symbol (for example, semi static DL or SSB symbols), the SPS HARQ-ACK may be dropped without further deferral. Note that using SPS-PUCCH-AN-List or n1PUCCH-AN for PUCCH resources means that deferred SPS HARQ-ACK is not multiplexed with dynamic HARQ-ACK.

(Option 2-2)
In option 2-2, only SPS HARQ-ACK deferral is applied and only semi-static PUCCH carrier switching is not applied.

In this case, the terminal 20 determines the target slot for the SPS HARQ-ACK according to the rules for deferring the SPS HARQ-ACK, and defers the SPS HARQ-ACK. Note that the target slot is the first available slot whose PUCCH resources do not overlap with invalid symbols.

SPS HARQ-ACK is not multiplexed with any dynamic HARQ-ACK and PUCCH resources determined before PUCCH carrier switching is performed (i.e. on PCell/PSCell/PUCCH-SCell) overlap with invalid symbols If so, SPS HARQ-ACK is deferred and semi-static PUCCH carrier switching for SPS HARQ-ACK is not performed. Otherwise, semi-static PUCCH carrier switching is applied.

(Alternation 2-2)
Alternation 2-2 describes the case where SPS HARQ-ACK deferral and dynamic PUCCH carrier switching are not performed simultaneously.

(Option 1)
In Option 1, the terminal 20 does not assume that deferral of SPS HARQ-ACK is valid in any SPS Configuration and, at the same time, dynamic PUCCH cell notification is valid in any DCI format.

In this case, the base station 10 enables/disables SPS HARQ-ACK postponement, or enables/disables dynamic PUCCH carrier switching, etc. so that SPS HARQ-ACK postponement and dynamic PUCCH carrier switching are not enabled at the same time. Control.

(Option 2)
In option 2, deferral of SPS HARQ-ACK is valid in any SPS configuration, while dynamic PUCCH cell notification is allowed to be configured in any DCI format, but deferred SPS HARQ-ACK and dynamic HARQ-ACK or other UCI are not multiplexed. There are three sub-options of Option 2:

(Option 2-1)
In option 2-1, the terminal 20 does not assume that the SPS HARQ-ACK will be postponed to slots that overlap with the slots of the PUCCH cells indicated by DCI.

In this case, the base station 10 enables/disables the postponement of SPS HARQ-ACK, or Controls DCI transmission timing.

(Option 2-2)
In option 2-2, terminal 20 drops the SPS HARQ-ACK if it is deferred to a slot overlapping the slot on the PUCCH cell signaled by DCI.

(Option 2-3)
In option 2-3, terminal 20 does not consider multiplexing of SPS HARQ-ACK and dynamic HARQ-ACK by notification of dynamic PUCCH cell when determining the target slot of SPS HARQ-ACK. In this case, terminal 20 may drop the dynamic HARQ-ACK.

(Effect of Alternation 2)
According to Alternation 2, SPS HARQ-ACK deferral and PUCCH carrier switching are not enabled at the same time, so the operation (control) of terminal 20 can be simplified.

Which of the above options is executed may be set by a higher layer parameter. Also, whether to perform any of the above options may be reported as a UE capability. Also, which of the above options to implement may be defined by the specification. Also, which of the above options to perform may be determined based on higher layer parameter configuration and UE capability reporting. Also, in the above embodiments, the slots may be replaced with sub-slots. Also, in the above embodiments, PUCCH cells may be replaced with PUCCH carriers.

It should be noted that the UE capabilities of 1)-7) shown below may be defined.

1) Whether to support PUCCH carrier switching 2) Whether to support dynamic PUCCH carrier switching 3) Whether to support semi-static PUCCH carrier switching 4) Whether to support SPS HARQ-ACK deferral 5) Whether to support both PUCCH carrier switching and SPS HARQ-ACK deferral 6) Whether to support both dynamic PUCCH carrier switching and SPS HARQ-ACK deferral 7) Semi-static PUCCH carrier switching and SPS Whether to support both HARQ-ACK deferrals

According to the above-described embodiment, when transmitting one or more UCIs in the terminal 20, PUCCH carrier switching, SPS HARQ-ACK deferral and multiplexing are applied in an appropriate order to determine resources for transmitting UCIs. can do.

That is, in a wireless communication system, a procedure for transmitting UCI (Uplink Control Information) can be determined.

(Device configuration)
Next, functional configuration examples of the base station 10 and the terminal 20 that execute the processes and operations described above will be described. The base stations 10 and terminals 20 contain the functionality to implement the embodiments described above. However, each of the base station 10 and the terminal 20 may have only the functions proposed in any of the embodiments.

<Base station 10>
FIG. 13 is a diagram showing an example of the functional configuration of the base station 10. As shown in FIG. As shown in FIG. 13 , the base station 10 has a transmitter 110 , a receiver 120 , a setter 130 and a controller 140 . The functional configuration shown in FIG. 13 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary. The transmitting unit 110 and the receiving unit 120 may be called a communication unit.

The transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher layer information from the received signals. Also, the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DL data, etc. to the terminal 20 . Also, the transmission unit 110 transmits the setting information and the like described in the embodiment.

The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads them from the storage device as necessary. The control unit 140 performs overall control of the base station 10 including control related to signal transmission/reception, for example. It should be noted that the functional unit related to signal transmission in control unit 140 may be included in transmitting unit 110 , and the functional unit related to signal reception in control unit 140 may be included in receiving unit 120 . Also, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.

<Terminal 20>
FIG. 14 is a diagram showing an example of the functional configuration of the terminal 20. As shown in FIG. As shown in FIG. 14, the terminal 20 has a transmitting section 210, a receiving section 220, a setting section 230, and a control section 240. The functional configuration shown in FIG. 14 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary. The transmitting unit 210 and the receiving unit 220 may be called a communication unit.

The transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal. Also, the transmitting unit 210 transmits HARQ-ACK, and the receiving unit 220 receives the setting information and the like described in the embodiment.

The setting unit 230 stores various types of setting information received from the base station 10 by the receiving unit 220 in the storage device, and reads them from the storage device as necessary. The setting unit 230 also stores preset setting information. The control unit 240 performs overall control of the terminal 20 including control related to signal transmission/reception. It should be noted that the functional unit related to signal transmission in control unit 240 may be included in transmitting unit 210 , and the functional unit related to signal reception in control unit 240 may be included in receiving unit 220 . Also, the transmitting section 210 and the receiving section 220 may be called a transmitter and a receiver, respectively.

(Hardware configuration)
The block diagrams (FIGS. 13 and 14) used to describe the above embodiments show blocks in functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices. A functional block may be implemented by combining software in the one device or the plurality of devices.

Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.

For example, the base station 10, the terminal 20, etc. according to the embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 15 is a diagram illustrating an example of hardware configurations of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and terminal 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. good too.

In the following explanation, the term "apparatus" can be read as a circuit, device, unit, or the like. The hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.

Each function of the base station 10 and the terminal 20 is performed by the processor 1001 performing calculations and controlling communication by the communication device 1004 by loading predetermined software (programs) onto hardware such as the processor 1001 and the storage device 1002. or by controlling at least one of data reading and writing in the storage device 1002 and the auxiliary storage device 1003 .

The processor 1001, for example, operates an operating system and controls the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, the control unit 140 , the control unit 240 and the like described above may be implemented by the processor 1001 .

In addition, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, control unit 140 of base station 10 shown in FIG. 13 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 . Also, for example, the control unit 240 of the terminal 20 shown in FIG. Although it has been explained that the above-described various processes are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. FIG. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.

The storage device 1002 is a computer-readable recording medium, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be configured. The storage device 1002 may also be called a register, cache, main memory (main storage device), or the like. The storage device 1002 can store executable programs (program code), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

The auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like. The storage medium described above may be, for example, a database, server, or other suitable medium including at least one of storage device 1002 and secondary storage device 1003 .

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD). may consist of For example, a transmitting/receiving antenna, an amplifier section, a transmitting/receiving section, a transmission line interface, etc. may be implemented by the communication device 1004 . The transceiver may be physically or logically separate implementations for the transmitter and receiver.

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

Each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between devices.

In addition, the base station 10 and the terminal 20 include hardware such as microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), and FPGAs (Field Programmable Gate Arrays). , and part or all of each functional block may be implemented by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

A configuration example of the vehicle 2001 is shown in FIG. As shown in FIG. 16, a vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, and various sensors 2021 to 2029. , an information service unit 2012 and a communication module 2013 . Each aspect/embodiment described in the present disclosure may be applied to a communication device mounted on vehicle 2001, and may be applied to communication module 2013, for example.

The driving unit 2002 is configured by, for example, an engine, a motor, or a hybrid of the engine and the motor. The steering unit 2003 includes at least a steering wheel (also referred to as steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

The electronic control unit 2010 is composed of a microprocessor 2031 , a memory (ROM, RAM) 2032 and a communication port (IO port) 2033 . Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010 . The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

The signals from the various sensors 2021 to 2029 include the current signal from the current sensor 2021 that senses the current of the motor, the rotation speed signal of the front and rear wheels acquired by the rotation speed sensor 2022, and the front wheel acquired by the air pressure sensor 2023. and rear wheel air pressure signal, vehicle speed signal obtained by vehicle speed sensor 2024, acceleration signal obtained by acceleration sensor 2025, accelerator pedal depression amount signal obtained by accelerator pedal sensor 2029, brake pedal sensor 2026 obtained by There are a brake pedal depression amount signal, a shift lever operation signal acquired by the shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028, and the like.

The information service unit 2012 includes various devices such as car navigation systems, audio systems, speakers, televisions, and radios for providing various types of information such as driving information, traffic information, and entertainment information, and one or more devices for controlling these devices. ECU. The information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide passengers of the vehicle 2001 with various multimedia information and multimedia services.

Driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), camera, positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, automatic driving vehicle (AV) map, etc. ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, AI processors, etc., to prevent accidents and reduce the driver's driving load. and one or more ECUs for controlling these devices. In addition, the driving support system unit 2030 transmits and receives various information via the communication module 2013, and realizes a driving support function or an automatic driving function.

The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via communication ports. For example, the communication module 2013 communicates with the vehicle 2001 through the communication port 2033, the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axle 2009, the electronic Data is transmitted and received between the microprocessor 2031 and memory (ROM, RAM) 2032 in the control unit 2010 and the sensors 2021-29.

The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from an external device via wireless communication. Communication module 2013 may be internal or external to electronic control unit 2010 . The external device may be, for example, a base station, a mobile station, or the like.

The communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication. In addition, the communication module 2013 receives the rotation speed signal of the front and rear wheels obtained by the rotation speed sensor 2022, the air pressure signal of the front and rear wheels obtained by the air pressure sensor 2023, and the vehicle speed sensor. 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, and a shift lever. A shift lever operation signal obtained by the sensor 2027 and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028 are also transmitted to an external device via wireless communication.

The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices, and displays it on the information service unit 2012 provided in the vehicle 2001 . Communication module 2013 also stores various information received from external devices in memory 2032 available to microprocessor 2031 . Based on the information stored in the memory 2032, the microprocessor 2031 controls the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, and the axle 2009 provided in the vehicle 2001. , sensors 2021 to 2029 and the like may be controlled.

(Summary of embodiment)
As described above, according to the embodiment of the present invention, a receiving unit that receives downlink data scheduled by SPS (Semi-Persistent Scheduling), carrier switching applied to a channel that carries uplink control information, and the Based on at least one of a control unit that executes at least one of deferring HARQ-ACK (Hybrid Automatic Repeat reQuest-ACKnowledgement) corresponding to downlink data, and deferring the carrier switching and the HARQ-ACK and a transmission unit for transmitting a channel carrying uplink control information including at least the HARQ-ACK using the determined resource, wherein the control unit executes the carrier switching before deferring the HARQ-ACK. A terminal is provided.

With the above configuration, when transmitting one or more UCIs in terminal 20, the resources for transmitting UCIs are determined by applying PUCCH carrier switching, SPS HARQ-ACK deferral and multiplexing in an appropriate order. be able to. That is, it is possible to determine a procedure for transmitting UCI (Uplink Control Information) in a wireless communication system.

The HARQ-ACK deferral includes at least one of a first deferral performed in a cell slot before carrier switching and a second deferral based on a cell slot after carrier switching. It's okay. With this configuration, the terminal 20 can postpone the SPS HARQ-ACK while suppressing an increase in delay.

The control unit may execute the first postponement when the second postponement cannot be applied. With this configuration, the terminal 20 can postpone the SPS HARQ-ACK while suppressing an increase in delay.

When the HARQ-ACK corresponding to the downlink data and a channel carrying uplink control information or data other than dynamic HARQ-ACK and HARQ-ACK overlap in the time domain, the operation of multiplexing is performed, It may be performed before execution of the carrier switching. With this configuration, when transmitting one or more UCIs in terminal 20, PUCCH carrier switching, SPS HARQ-ACK deferral and multiplexing are applied in an appropriate order to determine resources for transmitting UCIs. can be done.

When the HARQ-ACK corresponding to the downlink data and a channel carrying uplink control information or data other than dynamic HARQ-ACK and HARQ-ACK overlap in the time domain, the operation of multiplexing is performed, It may be performed after performing the carrier switching and before performing the deferral of the HARQ-ACK. With this configuration, when transmitting one or more UCIs in terminal 20, PUCCH carrier switching, SPS HARQ-ACK deferral and multiplexing are applied in an appropriate order to determine resources for transmitting UCIs. can be done.

Further, according to the embodiment of the present invention, a receiving procedure for receiving downlink data scheduled by SPS (Semi-Persistent Scheduling), carrier switching applied to channels carrying uplink control information, and corresponding to the downlink data HARQ-ACK (Hybrid Automatic Repeat reQuest-ACKnowledgement), a control procedure for executing at least one, and the carrier switching and the HARQ-ACK postponement, with resources determined based on at least one , a transmission procedure for transmitting a channel carrying uplink control information including at least the HARQ-ACK, and a procedure for executing the carrier switching prior to the postponement of the HARQ-ACK. .

With the above configuration, when transmitting one or more UCIs in terminal 20, the resources for transmitting UCIs are determined by applying PUCCH carrier switching, SPS HARQ-ACK deferral and multiplexing in an appropriate order. be able to. That is, it is possible to determine a procedure for transmitting UCI (Uplink Control Information) in a wireless communication system.

Further, according to the embodiment of the present invention, a receiving unit that receives downlink data scheduled by SPS (Semi-Persistent Scheduling), and carrier switching applied to a channel in which an acknowledgment for the downlink data is arranged , a control unit for controlling the feedback of the acknowledgment considering the relationship with the postponement of the acknowledgment that is not valid at the same time as the carrier switching.

The carrier switching is performed based on semi-static rules, and the control unit does not assume that the acknowledgment is valid in any SPS setting and at the same time semi-static carrier switching is valid.

The carrier switching is performed based on a semi-static rule, only one of the carrier switching and the postponement of the acknowledgment is applied, and the control unit controls the carrier switching when the carrier switching is applied. and if the acknowledgment deferral applies, determine the target slot of the acknowledgment according to the acknowledgment deferral rule, and defer the acknowledgment.

The carrier switching is performed based on dynamic notification by downstream control signals, and the controller does not assume that the acknowledgment is valid in any SPS setting and at the same time dynamic carrier switching is valid. .

The carrier switching is performed based on dynamic notification by a downlink control signal, and the control unit, if the acknowledgment is deferred to a slot overlapping a slot on the cell indicated by the downlink control signal, , drop said acknowledgment.

With the above configuration, SPS HARQ-ACK postponement and PUCCH carrier switching are not enabled at the same time, so terminal operation (control) can be simplified.

According to the disclosed technique, according to the embodiment of the present invention, the terminal receives downlink data scheduled by SPS (Semi-Persistent Scheduling), and applied to a channel in which an acknowledgment for the downlink data is arranged A communication method is provided that controls the feedback of the acknowledgment considering the relationship between carrier switching that is performed and deferment of the acknowledgment that the carrier switching is not enabled at the same time.

With the above configuration, SPS HARQ-ACK postponement and PUCCH carrier switching are not enabled at the same time, so terminal operation (control) can be simplified.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, replacements, and the like. be. Although specific numerical examples have been used to facilitate understanding of the invention, these numerical values are merely examples and any appropriate values may be used unless otherwise specified. The division of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. may apply (unless inconsistent) to the matters set forth in Boundaries of functional or processing units in functional block diagrams do not necessarily correspond to boundaries of physical components. The operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components. As for the processing procedures described in the embodiments, the processing order may be changed as long as there is no contradiction. Although the base station 10 and the terminal 20 have been described using functional block diagrams for convenience of explanation of processing, such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are stored in random access memory (RAM), flash memory, read-only memory, respectively. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other appropriate storage medium.

Also, notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods. For example, notification of information includes physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.In addition, RRC signaling may also be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.

Each aspect/embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system) system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer, a decimal number)), FRA (Future Radio Access), NR (new Radio), New radio access ( NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802 .16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems, and any extensions, modifications, creations, and provisions based on these systems. It may be applied to at least one of the next generation systems. Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this specification may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.

A specific operation performed by the base station 10 in this specification may be performed by its upper node in some cases. In a network consisting of one or more network nodes with base station 10, various operations performed for communication with terminal 20 may be performed by base station 10 and other network nodes other than base station 10 ( (eg, but not limited to MME or S-GW). Although the case where there is one network node other than the base station 10 is illustrated above, the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). .

Information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.

Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input/output information and the like can be overwritten, updated, or appended. The output information and the like may be deleted. The entered information and the like may be transmitted to another device.

The determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), may be performed by a boolean value (Boolean: true or false), or may be performed by comparing numerical values (e.g. , comparison with a predetermined value).

Software, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the 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.) to website, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.

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

The terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, the channel and/or symbols may be signaling. A signal may also be a message. A component carrier (CC) may also be called a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

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

The names used for the parameters described above are not restrictive names in any respect. Further, the formulas, etc., using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (e.g., 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 in no way restrictive names. isn't it.

In the present disclosure, "base station (BS)", "radio base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB ( gNB)", "access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", " Terms such as "cell group", "carrier", "component carrier" may be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.

A base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being associated with a base station subsystem (e.g., an indoor small base station (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 serving communication services in this coverage. point to

In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably. .

A mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like. The mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and mobile station may be an IoT (Internet of Things) device such as a sensor.

Also, the base station in the present disclosure may be read as a user terminal. For example, communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the terminal 20 may have the functions of the base station 10 described above. Also, words such as "up" and "down" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be read as side channels.

Similarly, user terminals in the present disclosure may be read as base stations. In this case, the base station may have the functions that the above-described user terminal has.

The terms "determining" and "determining" used in this disclosure may encompass a wide variety of actions. "Judgement" and "determination" are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as "judged" or "determined", and the like. Also, "judgment" and "determination" are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment" or "decision" has been made. In addition, "judgment" and "decision" are considered to be "judgment" and "decision" by resolving, selecting, choosing, establishing, comparing, etc. can contain. In other words, "judgment" and "decision" may include considering that some action is "judgment" and "decision". Also, "judgment (decision)" may be read as "assuming", "expecting", "considering", or the like.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being "connected" or "coupled." Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in this disclosure, two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.

The reference signal can also be abbreviated as RS (Reference Signal), and may also be called Pilot depending on the applicable standard.

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

Any reference to elements using the "first," "second," etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements can be employed or that the first element must precede the second element in any way.

"Means" in the configuration of each device described above may be replaced with "unit", "circuit", "device", or the like.

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

A radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of numerology.

A numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.

A slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. A slot may be a unit of time based on numerology.

A slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot. PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.

Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.

For example, one subframe may be called a Transmission Time Interval (TTI), a plurality of consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. may 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 may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum scheduling time unit in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis. Note that the definition of TTI is not limited to this.

A TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.

When one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum scheduling time unit. Also, the number of slots (the 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 called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like. A TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.

Note that the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms, and the short TTI (e.g., shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms A TTI having the above TTI length may be read instead.

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

Also, the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long. One TTI, one subframe, etc. may each consist of one or more resource blocks.

One or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. may be called.

Also, a resource block may be composed of one or more resource elements (RE: Resource Element). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

A bandwidth part (BWP) (which may also be called a bandwidth part) may represent a subset of contiguous common resource blocks (RBs) for a certain numerology on a certain carrier. Here, the common RB may be identified by an RB index based on the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be configured for terminal 20 within one carrier.

At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a given signal/channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

The structures such as radio frames, subframes, slots, minislots and symbols described above are only examples. For example, the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. can be varied.

In this disclosure, if articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are plural.

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

Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. In addition, the notification of predetermined information (for example, notification of “being X”) is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be practiced with modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not meant to be limiting in any way.

10 base station 110 transmitting unit 120 receiving unit 130 setting unit 140 control unit 20 terminal 210 transmitting unit 220 receiving unit 230 setting unit 240 control unit 30 core network 1001 processor 1002 storage device 1003 auxiliary storage device 1004 communication device 1005 input device 1006 output device 2001 Vehicle 2002 Drive Unit 2003 Steering Unit 2004 Accelerator Pedal 2005 Brake Pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear Wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Service Unit 2013 Communication Module 2021 Current Sensor 2022 Revolution Sensor 2023 Air Pressure Sensor 2024 Vehicle Speed Sensor 2024 Sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving support system unit 2031 Microprocessor 2032 Memory (ROM, RAM)
2033 communication port (IO port)

Claims (6)

1. a receiving unit that receives downlink data scheduled by SPS (Semi-Persistent Scheduling);
   Considering the relationship between carrier switching applied to a channel in which an acknowledgment for the downlink data is arranged and the postponement of the acknowledgment that is not valid at the same time as the carrier switching, feedback of the acknowledgment is performed. a control unit that controls
   terminal with
2. The carrier switching is performed based on semi-static rules,
   the controller does not assume that the acknowledgment is valid in any SPS setting and that semi-static carrier switching is valid at the same time;
   A terminal according to claim 1 .
3. The carrier switching is performed based on semi-static rules,
   only one of said carrier switching and deferring said acknowledgment is applied;
   The control unit
   if the carrier switch is applied, determine a target cell according to the carrier switching rules;
   if the acknowledgment deferral applies, determine a target slot for the acknowledgment according to the acknowledgment deferral rule and defer the acknowledgment;
   A terminal according to claim 1 .
4. The carrier switching is performed based on dynamic notification by a downlink control signal,
   the controller does not assume that the acknowledgment is valid in any SPS setting and that dynamic carrier switching is valid at the same time;
   A terminal according to claim 1 .
5. The carrier switching is performed based on dynamic notification by a downlink control signal,
   The control unit drops the acknowledgment when the acknowledgment is postponed to a slot overlapping a slot on the cell notified by the downlink control signal.
   A terminal according to claim 1 .
6. the terminal
   Receive downlink data scheduled by SPS (Semi-Persistent Scheduling),
   Considering the relationship between the carrier switching applied to the channel in which the acknowledgment for the downlink data is arranged and the postponement of the acknowledgment in which the carrier switching is not enabled at the same time, feedback of the acknowledgment to control the
   Communication method.

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