WO2022244458A1

WO2022244458A1 - Terminal and communication method

Info

Publication number: WO2022244458A1
Application number: PCT/JP2022/013604
Authority: WO
Inventors: 慎也熊谷; 聡永田; チーピンピ; ジンワン; ランチン
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2021-05-21
Filing date: 2022-03-23
Publication date: 2022-11-24
Also published as: JP2024097108A

Abstract

This terminal has a control unit for executing carrier switching applied to a channel that carries uplink control information and/or multiplexing applied to a channel that carries uplink control information and a channel that carries uplink control information, and a transmission unit for transmitting a channel that carries uplink control information to which the carrier switching and/or the multiplexing has been applied, the control unit applying either dynamic carrier switching using downlink control information or predefined semi-static carrier switching to a channel that carries uplink control information.

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 the TDD (Time Division Duplex) scheme (eg, Non-Patent Document 2).

For example, PUCCH carrier switching may be performed if a slot for transmitting HARQ-ACK is assigned to the downlink. On the other hand, even if the slot for transmitting HARQ-ACK is assigned to the downlink, if UCI (Uplink Control Information) multiplexing can be executed in the terminal, without executing PUCCH carrier switching, The terminal may send HARQ-ACK. In other words, the channel through which the UCI is transmitted may differ depending on the execution order of the processing operations.

The present invention has been made in view of the above points, and an object of the present invention is to determine a procedure for transmitting UCI (Uplink Control Information) in a wireless communication system.

According to the disclosed technique, a control unit that performs at least one of carrier switching applied to a channel carrying uplink control information and multiplexing applied to a channel carrying uplink control information and a channel carrying uplink control information and a transmitting unit that transmits a channel carrying uplink control information to which at least one of the carrier switching and the multiplexing is applied, wherein the control unit performs dynamic carrier switching according to downlink control information, and a predefined A terminal is provided that applies any of semi-static carrier switching to channels carrying uplink control information.

According to the disclosed technology, it is possible to determine a procedure for transmitting UCI (Uplink Control Information) in a wireless communication system.

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; 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. 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.

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, enhancement of HARQ-ACK feedback is being considered to meet URLLC requirements.

FIG. 3 is a diagram showing an example (1) of PUCCH carrier switching. PUCCH carrier switching is being considered for HARQ 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 timing from PDSCH to HARQ feedback.

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 and intra-UE multiplexing when PUCCH carrier switching is supported based on semi-static configuration and terminal 20 determines the PUCCH carrier based on a predetermined rule conditional on collision with invalid symbols. order of execution 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, if hybrid methods are supported, e.g. dynamic carrier switching and semi-static carrier switching, the interplay between dynamic carrier switching, semi-static carrier switching and possible multiplexing needs to be considered. There is

FIG. 5 is a flowchart showing an example (1) of UCI transmission according to the embodiment of the present invention. Dynamic carrier switching and semi-static carrier switching may be applied independently to dynamic PUCCH and semi-static PUCCH respectively, followed by multiplexing of possible UCIs. A dynamic PUCCH may be a PUCCH dynamically scheduled by a dynamic grant, for example, and a semi-static PUCCH may be a PUCCH semi-statically scheduled by an SPS, for example.

In step S11, the terminal 20 performs PUCCH carrier switching. In subsequent step S12, the terminal 20 performs multiplexing when conditions for multiplexing with respect to PUCCH are satisfied.

FIG. 6 is a flowchart showing an example (2) of UCI transmission according to the embodiment of the present invention. Possible UCI multiplexing may be performed between PUCCHs earlier, and dynamic carrier switching and semi-static carrier switching may be applied to PUCCH after multiplexing.

In step S21, the terminal 20 performs multiplexing when the conditions for multiplexing with respect to PUCCH are satisfied. In subsequent step S22, the terminal 20 performs PUCCH carrier switching.

FIG. 7 is a flowchart showing an example (3) of UCI transmission according to the embodiment of the present invention. Perform possible UCI multiplexing on semi-static PUCCH first, apply dynamic carrier switching and semi-static carrier switching independently to dynamic PUCCH and semi-static PUCCH respectively, then possible multiplexing. may be performed between dynamic PUCCH and semi-static PUCCH.

In step S31, the terminal 20 multiplexes the semi-static PUCCH if the conditions for multiplexing are satisfied. In subsequent step S32, the terminal 20 performs PUCCH carrier switching. In the subsequent step S33, multiplexing is performed for the dynamic PUCCH and the semi-static PUCCH if the conditions for multiplexing are met.

FIG. 8 is a flowchart showing an example (4) of UCI transmission according to the embodiment of the present invention. Perform pre-possible UCI multiplexing between dynamic HARQ-ACK and SPS HARQ-ACK, and apply dynamic carrier switching and semi-static carrier switching independently to dynamic PUCCH and semi-static PUCCH respectively. , and then semi-static PUCCH carrying HARQ-ACK and other UCIs and possible multiplexing may be performed. Note that dynamic HARQ-ACK may be HARQ-ACK for PDSCH by dynamic grant. SPS HARQ-ACK may be HARQ-ACK for SPS-PDSCH.

In step S41, the terminal 20 performs multiplexing for dynamic HARQ-ACK and SPS HARQ-ACK if the multiplexing condition is satisfied. In subsequent step S42, the terminal 20 performs PUCCH carrier switching. In the following step S43, multiplexing is performed for HARQ-ACK PUCCH and semi-static PUCCH of other UCI types if the conditions for multiplexing are satisfied.

In the operations shown in FIGS. 5, 6, 7 and 8, the conditions for multiplexing the UCI may be the conditions shown in 1)-3) below. Note that PUCCHs to be multiplexed may be assigned to the same carrier or may be assigned to different carriers.

1) When one PUCCH resource overlaps another PUCCH resource.
2) When a slot containing one PUCCH overlaps a slot containing another PUCCH. Or when two PUCCHs are included in the same slot.
3) When one PUCCH resource overlaps a slot containing another PUCCH.

Which of the above 1)-3) is applied may differ depending on the UCI type. For example, in the case of multiplexing dynamic HARQ-ACK and SPS HARQ-ACK, 2) above may be applied. Also, for example, in the case of multiplexing HARQ-ACK and CSI, 1) above may be applied. A slot is defined based on the SCS of each carrier.

Also, in the operations shown in FIGS. 5, 6, 7 and 8, the rules related to UCI multiplexing shown in 1)-4) below may be applied.

1) When two PUCCHs are mapped to the same carrier, the multiplexed PUCCH may be mapped to the same carrier. For example, if dynamic HARQ-ACK and SPS HARQ-ACK are on the same carrier CC#0, the PUCCH after multiplexing may be the PUCCH resource for dynamic HARQ-ACK.

2) When two PUCCHs are mapped to the same carrier, the multiplexed PUCCH may be mapped to the same carrier. For example, when SPS HARQ-ACK and CSI are on the same carrier CC#0, the PUCCH after multiplexing may be the PUCCH resource of CSI.

3) When two PUCCHs are mapped to different carriers, the multiplexed PUCCH may be mapped to a carrier on which PUCCHs of the same UCI type as the selected UCI type are mapped. For example, if dynamic HARQ-ACK is mapped to CC#1 and SPS HARQ-ACK is mapped to CC#2, PUCCH after multiplexing may be mapped to CC#1, which is mapped to dynamic HARQ-ACK.

4) When two PUCCHs are mapped to different carriers, the multiplexed PUCCH may be mapped to a carrier on which PUCCHs of the same UCI type as the selected UCI type are mapped. For example, if SPS HARQ-ACK is assigned to CC#2 and CSI is assigned to CC#3, PUCCH after multiplexing may be assigned to CC#2 to which SPS HARQ-ACK is assigned.

Also, in the operations shown in FIGS. 5, 6, 7 and 8, dynamic or semi-static PUCCH carrier switching may be applied to PUCCH as shown in 1)-3) below.

1) If the target PUCCH is a non-multiplexed PUCCH (one UCI type), PUCCH carrier switching may be applied based on the UCI type. For example, in the case of dynamic HARQ-ACK PUCCH, dynamic PUCCH carrier switching may be applied. For example, in the case of SPS HARQ-ACK PUCCH, if semi-static PUCCH carrier switching is applicable to the SPS HARQ-ACK, semi-static PUCCH carrier switching may be applied. For example, in the case of a PUCCH of CSI, PUCCH carrier switching may not be applied to the PUCCH of that CSI if semi-static PUCCH carrier switching is not applicable to that CSI.

2) If the target PUCCH is the multiplexed PUCCH, PUCCH carrier switching may be applied based on the UCI type of the multiplexed PUCCH resource. For example, dynamic PUCCH carrier switching may be applied when PUCCH after multiplexing dynamic HARQ-ACK and SPS HARQ-ACK is transmitted on PUCCH resources configured with dynamic HARQ-ACK. For example, when PUCCH after multiplexing SPS HARQ-ACK and CSI is transmitted on PUCCH resources in which CSI is configured, and when semi-static PUCCH carrier switching is applicable to SPS HARQ-ACK, PUCCH carrier switching may not be applied to PUCCH after multiplexing.

3) If the target PUCCH is the multiplexed PUCCH, PUCCH carrier switching may be applied based on the UCI type included in the multiplexed PUCCH. For example, if the PUCCH after multiplexing contains dynamic HARQ-ACK, dynamic PUCCH carrier switching may be applied. Semi-static PUCCH carrier switching may be applied, for example, if the PUCCH after multiplexing does not include dynamic HARQ-ACK and includes UCI types for which semi-static PUCCH carrier switching is applicable. PUCCH carrier switching may not be applied unless multiplexed PUCCH includes dynamic HARQ-ACK or does not include dynamic HARQ-ACK and includes UCI types for which semi-static PUCCH carrier switching is applicable. .

Which of the sequences shown in FIGS. 5, 6, 7 and 8 above is to be executed may be set by upper layer parameters. Also, which sequence shown in FIGS. 5, 6, 7 and 8 to perform may be reported as a UE capability. Also, which sequence shown in FIGS. 5, 6, 7 and 8 is to be executed may be defined by specifications. Also, which sequence shown in FIGS. 5, 6, 7 and 8 is to be executed may be determined based on higher layer parameter settings and UE capability reports.

It should be noted that the UE capabilities of 1)-6) 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 hybrid carrier switching 5) PUCCH Whether to support multiplexing before carrier switching 6) Whether to support PUCCH carrier switching before multiplexing

According to the above embodiment, when transmitting one or more UCIs in the terminal 20, it is possible to determine resources for transmitting the UCIs by applying PUCCH carrier switching and multiplexing in an appropriate order.

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. 9 is a diagram showing an example of the functional configuration of the base station 10. As shown in FIG. As shown in FIG. 9, the base station 10 has a transmitting section 110, a receiving section 120, a setting section 130, and a control section 140. The functional configuration shown in FIG. 9 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. 10 is a diagram showing an example of the functional configuration of the terminal 20. As shown in FIG. As shown in FIG. 10, 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. 10 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. 9 and 10) 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. 11 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. 9 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.

(Summary of embodiment)
As described above, according to the embodiments of the present invention, carrier switching applied to channels carrying uplink control information and multiplexing applied to channels carrying uplink control information and channels carrying uplink control information are performed. and a transmitter for transmitting a channel carrying uplink control information to which at least one of the carrier switching and the multiplexing is applied, wherein the control unit includes downlink control information A terminal is provided that applies either dynamic carrier switching according to , or predefined semi-static carrier switching to a channel carrying uplink control information.

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

The control unit may apply the multiplexing after applying the carrier switching. With this configuration, when transmitting one or more UCIs in the terminal 20, it is possible to determine resources for transmitting the UCIs by applying PUCCH carrier switching and multiplexing in an appropriate order.

The control unit may apply the carrier switching after applying the multiplexing. With this configuration, when transmitting one or more UCIs in the terminal 20, it is possible to determine resources for transmitting the UCIs by applying PUCCH carrier switching and multiplexing in an appropriate order.

The control unit may apply the dynamic carrier switching to a channel carrying dynamically scheduled uplink control information, and apply the semi-static carrier switching to a channel carrying semistatically scheduled uplink control information. With this configuration, when transmitting one or more UCIs in the terminal 20, it is possible to determine resources for transmitting the UCIs by applying PUCCH carrier switching and multiplexing in an appropriate order.

The control unit may determine whether to apply the dynamic carrier switching or the semi-static carrier switching to the channel carrying the uplink control information based on the type of uplink control information. With this configuration, when transmitting one or more UCIs in the terminal 20, it is possible to determine resources for transmitting the UCIs by applying PUCCH carrier switching and multiplexing in an appropriate order.

Further, according to the embodiment of the present invention, at least one of carrier switching applied to a channel carrying uplink control information and multiplexing applied to a channel carrying uplink control information and a channel carrying uplink control information a transmission procedure for transmitting a channel carrying uplink control information to which at least one of said carrier switching and said multiplexing is applied; dynamic carrier switching according to downlink control information; and a predefined semi-static carrier A communication method is provided in which a terminal performs a procedure of applying any of the switching to channels carrying uplink control information.

(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, the 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). , broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. The RRC signaling may also be called an RRC message, such as an 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), FRA (Future Radio Access), NR (new Radio), 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 extended 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. is not.

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," and "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: Communication services can also be provided by Remote Radio Head)). The terms "cell" or "sector" refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.

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.

This international patent application claims priority based on Japanese Patent Application No. 2021-086556 filed on May 21, 2021, and the entire contents of Japanese Patent Application No. 2021-086556 are incorporated herein. invoke.

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

Claims

a control unit that performs at least one of carrier switching applied to a channel carrying uplink control information and multiplexing applied to a channel carrying uplink control information and a channel carrying uplink control information;
a transmitting unit that transmits a channel carrying uplink control information to which at least one of the carrier switching and the multiplexing is applied;
A terminal in which the control unit applies either dynamic carrier switching based on downlink control information or predetermined semi-static carrier switching to a channel carrying uplink control information.
The terminal according to claim 1, wherein the control unit applies the multiplexing after applying the carrier switching.
The terminal according to claim 1, wherein the control unit applies the carrier switching after applying the multiplexing.
2. The control unit according to claim 1, wherein the control unit applies the dynamic carrier switching to a channel carrying dynamically scheduled uplink control information, and applies the semistatic carrier switching to a channel carrying semistatically scheduled uplink control information. terminal.
The terminal according to claim 1, wherein the control unit determines whether to apply the dynamic carrier switching or the semi-static carrier switching to the channel carrying the uplink control information based on the type of uplink control information.
a control procedure for performing at least one of carrier switching applied to a channel carrying uplink control information and multiplexing applied to a channel carrying uplink control information and a channel carrying uplink control information;
a transmission procedure for transmitting a channel carrying uplink control information to which at least one of the carrier switching and the multiplexing is applied;
A communication method in which a terminal performs a procedure of applying either dynamic carrier switching according to downlink control information or a predefined semi-static carrier switching to a channel carrying uplink control information.