Terminals and wireless base stations

Abstract

Provided is a terminal that receives a message in a radio resource control layer and assumes the number of repetitions of a physical uplink control channel for each resource or format of the physical uplink control channel on the basis of the received message.

Description

[Technical Field]

[0001] The present disclosure relates to a terminal and a radio base station that support repeated transmission of a physical uplink control channel. [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP) has developed specifications for the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)), and is also developing specifications for the next generation, known as Beyond 5G, 5G Evolution, or 6G.

[0003] For example, in 3GPP Release-17, it has been agreed to study Coverage Enhancement (CE) in NR (Non-Patent Document 1). The study includes signaling to a terminal (User Equipment, UE) to support repetition of a Physical Uplink Control Channel (PUCCH). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] "New WID on NR coverage enhancements", RP-202928, 3GPP TSG RAN meeting #90e, 3GPP, December 2020 Summary of the Invention

[0005] In the current 3GPP specifications, the number of repetitions of a PUCCH can only be set uniformly, and the number of repetitions cannot be dynamically changed for each PUCCH resource or format.

[0006] Therefore, the following disclosure has been made in consideration of the above circumstances, and aims to provide a terminal and a radio base station that can support flexible repetition of PUCCH.

[0007] One aspect of the present disclosure is a terminal (UE200) having a receiving unit (control signal / reference signal processing unit 240) that receives a message of a radio resource control layer, and a control unit (control unit 270) that estimates the number of repetitions for each resource or format of a physical uplink control channel based on the message.

[0008] One aspect of the present disclosure is a terminal (UE200) having a receiving unit (control signal / reference signal processing unit 240) that receives control elements of a medium access control layer, and a control unit (control unit 270) that estimates the number of repetitions of the physical uplink control channel based on parameters of the physical uplink control channel included in the control elements.

[0009] One aspect of the present disclosure is a terminal (UE 200) including a receiving unit (control signal / reference signal processing unit 240) that receives downlink control information, and a control unit (control unit 270) that estimates the number of repetitions of the physical uplink control channel based on parameters included in the downlink control information.

[0010] One aspect of the present disclosure is a radio base station (e.g., gNB100A) that includes a control unit (control unit 270) that dynamically controls the number of repetitions of the physical uplink control channel, and a transmission control signal / reference signal processing unit (240) that transmits information of a specific layer indicating the number of repetitions to a terminal (UE200).

[0011] One aspect of the present disclosure is a radio base station (e.g., gNB100A) that includes a transmitter control signal / reference signal processing unit (240) that transmits downlink control information for scheduling a physical downlink data channel, and a control unit (control unit 270) that includes a parameter indicating the number of repetitions of the physical uplink control channel in the downlink control information. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing the overall schematic configuration of a wireless communication system 10. As shown in FIG. [Figure 2] FIG. 2 is a diagram showing an example of the configuration of a radio frame, a subframe, and a slot used in the radio communication system 10. As shown in FIG. [Figure 3] Figure 3 is a functional block diagram of gNB100A, gNB100B and UE200. [Figure 4] FIG. 4 is a diagram showing a schematic communication sequence according to an operation example. [Figure 5] FIG. 5 is a diagram illustrating a configuration example (part 1) of a PUCCH-Config information element according to the first operation example. [Figure 6] FIG. 6 is a diagram illustrating a configuration example (part 2) of a PUCCH-Config information element according to the first operation example. [Figure 7] FIG. 7 is a diagram illustrating an example of the configuration of a MAC-CE according to the second operation example. [Figure 8] Figure 8 is a diagram showing an example of the hardware configuration of gNB100A, gNB100B, and UE200. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are used to designate the same functions or configurations, and descriptions thereof will be omitted as appropriate.

[0014] (1) Overall configuration of wireless communication system 1 is a schematic diagram of the overall configuration of a wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system conforming to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20) and a terminal 200 (User Equipment 200, hereinafter, UE 200).

[0015] The wireless communication system 10 may be a wireless communication system conforming to a system called Beyond 5G, 5G Evolution, or 6G.

[0016] The NG-RAN 20 includes a radio base station 100A (hereinafter, gNB100A) and a radio base station 100B (hereinafter, gNB100B). Note that the specific configuration of the radio communication system 10, including the number of gNBs and UEs, is not limited to the example shown in FIG. 1.

[0017] The NG-RAN 20 actually includes a plurality of NG-RAN nodes, specifically, gNBs, and is connected to a 5G-compliant core network (5GC, not shown). The NG-RAN 20 and the 5GC may be simply referred to as a "network."

[0018] The gNB100A and gNB100B are radio base stations that comply with NR, and perform NR radio communication with the UE 200. The gNB100A, gNB100B, and UE 200 are capable of supporting Massive MIMO, which generates a more directional beam (BM) by controlling radio signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which aggregates and uses multiple component carriers (CCs), and Dual Connectivity (DC), which simultaneously communicates between the UE and multiple NG-RAN nodes.

[0019] The wireless communication system 10 supports FR1 and FR2. The frequency bands of each FR are as follows:

[0020] FR1: 410 MHz to 7.125 GHz FR2: 24.25 GHz~52.6 GHz FR1 may use a Sub-Carrier Spacing (SCS) of 15, 30, or 60 kHz and a bandwidth (BW) of 5 to 100 MHz. FR2 is a higher frequency than FR1, and may use an SCS of 60 or 120 kHz (including 240 kHz) and a bandwidth (BW) of 50 to 400 MHz.

[0021] Furthermore, the wireless communication system 10 may also support frequency bands higher than the FR2 frequency band. Specifically, the wireless communication system 10 may support frequency bands above 52.6 GHz up to 114.25 GHz.

[0022] Alternatively, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM) with a larger Sub-Carrier Spacing (SCS) may be applied. Furthermore, DFT-S-OFDM may be applied not only to the uplink (UL) but also to the downlink (DL).

[0023] FIG. 2 shows an example of the configuration of a radio frame, a subframe, and a slot used in the radio communication system 10. In FIG.

[0024] As shown in Figure 2, one slot consists of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). Note that the number of symbols constituting one slot does not necessarily have to be 14 symbols (for example, 28 or 56 symbols). The number of slots per subframe may differ depending on the SCS. Furthermore, although not shown, the SCS may be spaced at wider intervals, such as 480 kHz or 960 kHz.

[0025] 2 may be called a time domain, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a resource block, a subcarrier, a BWP (Bandwidth part), etc.

[0026] Furthermore, the wireless communication system 10 can support Coverage Enhancement (CE), which expands the coverage of the cell formed by the gNB 100A (and the gNB 100B, hereinafter the same). Coverage enhancement may provide a mechanism for increasing the success rate of reception of various physical channels.

[0027] In this embodiment, the wireless communication system 10 (gNB100A) can support repeated transmission of a physical downlink data channel, specifically, a PDSCH (Physical Downlink Shared Channel). Also, the UE 200 can support repeated transmission of a physical uplink control channel, specifically, a PUCCH (Physical Uplink Control Channel).

[0028] (2) Functional block configuration of wireless communication system Next, a functional block configuration of the wireless communication system 10 will be described. Specifically, a functional block configuration of the UE 200 will be described. Fig. 3 is a functional block configuration diagram of the gNB 100A, the gNB 100B, and the UE 200.

[0029] It should be noted that Fig. 3 shows only the main functional blocks relevant to the description of the embodiment, and that UE200 (gNB100A, gNB100B) has other functional blocks (e.g., a power supply unit, etc.). Fig. 3 shows the functional block configuration of UE200, and for the hardware configuration, please refer to Fig. 8.

[0030] The radio signal transmitting / receiving unit 210 transmits and receives radio signals conforming to NR. The radio signal transmitting / receiving unit 210 supports Massive MIMO, CA that uses a bundle of multiple CCs, and DC that simultaneously communicates between a UE and two NG-RAN nodes.

[0031] The amplifier unit 220 is configured by a PA (Power Amplifier) / LNA (Low Noise Amplifier), etc. The amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. The amplifier unit 220 also amplifies the RF signal output from the radio signal transmission / reception unit 210.

[0032] The modem unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (e.g., gNB 100A). The modem unit 230 may apply Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM). Furthermore, DFT-S-OFDM may be used not only for uplink (UL) but also for downlink (DL).

[0033] The control signal / reference signal processor 240 performs processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200 .

[0034] Specifically, the control signal / reference signal processor 240 receives various control signals, such as control signals of the radio resource control layer (RRC), transmitted from the gNB 100A (or the gNB 100B, hereinafter the same) via a predetermined control channel. The control signal / reference signal processor 240 also transmits various control signals to the gNB 100A via a predetermined control channel.

[0035] The control signal / reference signal processor 240 performs processing using reference signals (RS) such as a Demodulation Reference Signal (DMRS) and a Phase Tracking Reference Signal (PTRS).

[0036] DMRS is a reference signal (pilot signal) known between the base station and the terminal for estimating the fading channel used for data demodulation. PTRS is a terminal-specific reference signal for estimating phase noise, which is an issue in high frequency bands.

[0037] In addition to the DMRS and PTRS, the reference signals may include a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information.

[0038] The channels include a control channel and a data channel, such as a PDCCH (Physical Downlink Control Channel), a PUCCH (Physical Uplink Control Channel), a RACH (Random Access Channel, Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI)), and a Physical Broadcast Channel (PBCH).

[0039] The data channel includes a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), etc. Data may refer to data transmitted via a data channel.

[0040] Furthermore, the physical channels may include at least a PDCCH, a PUCCH, a PUSCH, and a PDSCH.

[0041] As described above, the control signal and reference signal processor 240 can receive messages of the radio resource control layer (RRC). In this embodiment, the control signal and reference signal processor 240 may constitute a receiver. Specifically, the control signal and reference signal processor 240 can receive RRC Reconfiguration and the like.

[0042] As described above, the control signal and reference signal processor 240 can also receive a control element (MAC-CE) of the medium access control layer (MAC). Specifically, the control signal and reference signal processor 240 can receive a MAC-CE including a PUCCH resource configuration (which may be a parameter).

[0043] Furthermore, as described above, the control signal and reference signal processor 240 can receive downlink control information (DCI), particularly DCI for scheduling the physical downlink data channel (PDSCH) (which may also be referred to as scheduling DCI). Specifically, the control signal and reference signal processor 240 can receive DCI in accordance with a specified DCI format (for example, DCI format 1_0 / 1_1 / 1_2).

[0044] Examples of RRC signaling, MAC-CE configuration, and DCI configuration will be described later.

[0045] Furthermore, the control signal and reference signal processor 240 can transmit to the network capability information (UE Capability Information) indicating the capability of the UE 200. In this embodiment, the control signal and reference signal processor 240 may constitute a transmitter.

[0046] In particular, in this embodiment, the control signal and reference signal processor 240 can transmit capability information of the UE 200 regarding repetition of the physical uplink control channel (PUCCH). Specifically, the control signal and reference signal processor 240 can transmit UE capability information indicating whether or not the UE 200 can support PUCCH repetition. Details of the UE capability information will be described later.

[0047] The encoding / decoding unit 250 performs data division / concatenation and channel coding / decoding for each predetermined communication destination (such as gNB100A).

[0048] Specifically, the encoding / decoding unit 250 divides the data output from the data transmitting / receiving unit 260 into pieces of a predetermined size, performs channel coding on the divided data, decodes the data output from the modem unit 230, and concatenates the decoded data.

[0049] The data transmitter / receiver 260 transmits and receives Protocol Data Units (PDUs) and Service Data Units (SDUs). Specifically, the data transmitter / receiver 260 assembles and disassembles PDUs / SDUs in multiple layers (such as a Medium Access Control layer (MAC), a Radio Link Control layer (RLC), and a Packet Data Convergence Protocol layer (PDCP)). The data transmitter / receiver 260 also performs data error correction and retransmission control based on Hybrid Automatic Repeat Request (Hybrid ARQ).

[0050] The control unit 270 controls each functional block constituting the UE 200. In particular, in this embodiment, the control unit 270 can execute various controls related to physical channels to support coverage extension (CE).

[0051] Specifically, the control unit 270 can estimate the number of repetitions (which may also be called the repetition number) for each PUCCH resource or format (PUCCH resource / format) based on the RRC message received by the control signal / reference signal processing unit 240.

[0052] Specifically, control unit 270 may estimate (or may read as expectation or determination) the number of repetitions based on the content of a field (which may be called nrofSlots) included in a PUCCH-Config information element (see 3GPP TS38.331). PUCCH repetition is assumed to be performed in the time direction, but this does not exclude repetition in the frequency direction.

[0053] Furthermore, control unit 270 may estimate the number of PUCCH repetitions based on PUCCH parameters included in the received MAC-CE. Specifically, when PUCCH spatial relation activation / deactivation or SP CSI (Semi-Persistent Channel State Information) reporting on PUCCH activation / deactivation is configured by MAC-CE, the presence / absence of PUCCH repetition and / or the number of repetitions may be instructed from the network in addition to these.

[0054] Furthermore, control unit 270 may estimate the number of repetitions of the PUCCH based on parameters included in the DCI. Specifically, when scheduling the PDSCH by DCI, the presence or absence of repetition and / or the number of repetitions may be indicated in addition to the PUCCH resource indicator and the PDSCH-to-HARQ (Hybrid Automatic repeat request) feedback timing indicator (k).

[0055] In addition, the above-mentioned function related to dynamic repetition of PUCCH may also be provided in gNB100A (and / or gNB100B, the same applies below).

[0056] For example, gNB100A (radio base station) may include a control unit 270 that dynamically controls the number of repetitions of PUCCH, and a transmission unit (control signal / reference signal processing unit 240) that transmits information of a specific layer (RRC, MAC or PHY) indicating the number of repetitions to UE200.

[0057] The gNB100A may also include a transmitter (control signal / reference signal processor 240) that transmits downlink control information (DCI) for scheduling the physical downlink data channel (PDSCH), and a controller 270 that includes a parameter indicating the number of times the PUCCH is repeated in the downlink control information.

[0058] (3) Operation of the wireless communication system Next, a description will be given of the operation of the wireless communication system 10. Specifically, a description will be given of the operation related to repeated transmission of the physical uplink control channel (PUCCH) compatible with coverage enhancement (CE).

[0059] (3.1) Premise In the current 3GPP specifications, the number of PUCCH repetitions can only be set to a single value and cannot be set dynamically. Specifically, only the same number of repetitions can be set uniformly for the PUCCH resource and the PUCCH format. More specifically, the nrofSlots field included in the PUCCH-Config information element is used.

[0060] As described above, since only a uniform setting is possible, it is not possible to change the repetition number for each PUCCH resource or for each PUCCH format depending on the antenna beam (beam BM) of the radio base station, for example.

[0061] Furthermore, the number of repetitions cannot be dynamically set in response to some event.

[0062] (3.2) Operation overview The following describes an operation related to dynamically setting a different number of repetitions for each PUCCH resource / format by eliminating the above-mentioned constraints on PUCCH repetition. Specifically, the following operation example will be described.

[0063] (Operation example 1): In RRC, set different repetition counts for each PUCCH resource (Operation example 2): When configuring PUCCH spatial relation activation / deactivation or SP CSI reporting on PUCCH activation / deactivation using MAC-CE, set (instruct) whether or not to enable repetition and / or the number of repetitions. (Operation example 3): When scheduling PDSCH by DCI, in addition to the PUCCH resource indicator and PDSCH-to-HARQ feedback timing indicator (k), the presence or absence of repetition and / or the number of repetitions is set (instructed). (Operation example 4): The UE reports its capability regarding the dynamic indication of PUCCH Repetition. Fig. 4 shows a schematic communication sequence according to an example of operation. As shown in Fig. 4, UE 200 can notify the network (NG-RAN 20) of its capability (UE Capability Information) regarding PUCCH Repetition (S10). The capability may include whether dynamic PUCCH Repetition setting is supported, the number of supported Repetitions, etc. Specific examples of the capability will be described later.

[0064] The network may determine resources to which the PUCCH is allocated based on the notified capability information (S20). This determination may include a setting related to PUCCH Repetition.

[0065] Based on the determination result of the PUCCH resource, the network may instruct the UE 200 on the setting contents regarding the PUCCH Repetition (S30). As described above, the instruction may be made using RRC, MAC, or DCI.

[0066] The UE 200 may configure the PUCCH resources based on the instruction (S40). The configuration may include information related to PUCCH Repetition.

[0067] The UE 200 may repeatedly transmit the PUCCH in accordance with the setting (S50).

[0068] (3.3) Example of operation Next, the above-mentioned operation examples 1 to 4 will be described in detail.

[0069] (3.3.1) Example 1 In this operation example, when PUCCH resources are configured using RRC signaling, the number of repetitions may be configured for each PUCCH resource.

[0070] 5 and 6 show configuration examples of the PUCCH-Config information element according to operation example 1. Specifically, as shown in Fig. 5, nrofSlots (see underlined portion) may be added to the PUCCH-Resource field. nrofSlots may indicate the number of repetitions of the PUCCH. This may allow a different number of repetitions to be set for each pucch-ResourceId.

[0071] Alternatively, as shown in FIG. 6, nrofSlots may be added to a field for each PUCCH format.

[0072] In this case, the configurations of MAC CE and DCI format 1_0 / 1_1 do not need to be changed. Specifically, in the case of MAC-CE, for example, when "SP CSI reporting on PUCCH Activation / Deactivation" is set, a CSI-ReportConfig linked to the PUCCH resource indicator may be set.

[0073] In addition, in the case of DCI format 1_0 / 1_1 / 1_2, a PUCCH resource indicator may be set.

[0074] (3.3.2) Example 2 In this operation example, when PUCCH spatial relation activation / deactivation or SP CSI reporting on PUCCH activation / deactivation is configured using MAC-CE, the presence or absence of PUCCH repetition and / or the number of repetitions may be indicated.

[0075] Fig. 7 shows an example of the configuration of a MAC-CE according to operation example 2. As shown in Fig. 7, for example, the presence or absence of PUCCH repetition and / or the number of repetitions may be indicated using a reserved bit of PUCCH spatial relation activation / deactivation or SP CSI reporting on PUCCH activation / deactivation.

[0076] Alternatively, when a PUCCH resource indicator is configured in a reportConfigId of a CSI-ReportConfig by RRC signaling, a different repetition number may be configured for each reportConfigId. Alternatively, a field for setting the PUCCH repetition number may be added using a reserved index of a MAC-CE.

[0077] If the PUCCH repetition number is not set by MAC-CE, the PUCCH repetition number set by RRC signaling may be set as a default value. Alternatively, if both are set, the setting by MAC-CE or RRC may be prioritized.

[0078] (3.3.3) Example 3 In this operation example, the DCI may set the presence or absence of repetition and / or the number of repetitions in addition to the PUCCH resource indicator and / or the PDSCH-to-HARQ feedback timing indicator (k).

[0079] Specifically, the configuration of DCI format 1_0 / 1_1 / 1_2 may be maintained, and the values ​​of existing fields may be changed. For example, of the PUCCH resource indicator (3 bits) or the PDSCH-to-HARQ feedback timing indicator (k) (3 bits), the first bit may be used to set the PUCCH resource indicator, and the latter two bits may be used to set the repetition number.

[0080] The interpretation of the field may be notified to UE 200 using at least one of RRC, MAC-CE, and DCI.

[0081] Alternatively, a new DCI format different from the existing DCI format may be defined. For example, a DCI format may be defined that adds a field for setting whether or not PUCCH repetition is performed and / or the number of repetitions.

[0082] Furthermore, when dynamic repetition setting of PUCCH is instructed by RRC, MAC-CE, and DCI, for example, the most recent instruction may be applied, or any instruction may be applied preferentially.

[0083] (3.3.4) Example 4 In this operation example, the UE 200 may report to the network, for example, the following capability regarding whether or not the UE 200 can handle PUCCH repetition.

[0084] ·Whether or not Repetition's Dynamic indication can be applied ·Applicability of MAC-CE with added repetition number - Support for new DCI format with added repetition number The UE 200 may report the frequency band (which may also be simply referred to as a frequency or band) that the UE 200 supports by any of the following methods.

[0085] - Support for all frequencies at once (support as a mobile station) · Availability of each frequency · Availability of FR1 / FR2 The UE 200 may report the duplex mode that the UE 200 supports by any of the following methods.

[0086] · UE compatibility · Support for each duplex method (TDD / FDD)

[0087] (4) Actions and Effects According to the above-described embodiment, the following advantageous effects can be obtained: Specifically, the UE 200 can estimate the number of repetitions (which may also be referred to as the number of repetitions) for each PUCCH resource or format (PUCCH resource / format) based on an RRC message received from a radio base station (for example, the gNB 100A).

[0088] Furthermore, the UE 200 may estimate the number of repetitions of the PUCCH based on the parameters of the PUCCH included in the MAC-CE received from the radio base station.

[0089] Furthermore, the UE 200 may estimate the number of repetitions of the PUCCH based on a parameter included in the DCI.

[0090] Therefore, the number of repetitions can be dynamically changed for each PUCCH resource or format, and flexible repetition of PUCCH can be supported.

[0091] In this embodiment, the UE 200 can transmit UE Capability Information regarding the PUCCH Repetition of the UE 200. This allows the network to reliably set an appropriate PUCCH Repetition according to the PUCCH capability of the UE 200.

[0092] (5) Other embodiments Although the embodiments have been described above, it will be obvious to those skilled in the art that the present invention is not limited to the description of the embodiments and that various modifications and improvements are possible.

[0093] For example, in the above-described embodiment, the PUCCH is described as an example of a physical uplink control channel, but any control channel (physical channel) in the uplink (UL) does not necessarily have to be the PUCCH.

[0094] The block diagram (FIG. 3) used in the description of the above-described embodiment shows functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or multiple devices with software.

[0095] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how each is implemented.

[0096] Furthermore, the above-described gNB100A, gNB100B, and UE200 (the devices) may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 8 is a diagram showing an example of the hardware configuration of the devices. As shown in Figure 8, the devices may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0097] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the apparatus may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0098] Each functional block of the device (see FIG. 3) is realized by any hardware element of the computer device or a combination of the hardware elements.

[0099] In addition, each function of the device is realized by loading specified software (programs) onto hardware such as processor 1001 and memory 1002, causing processor 1001 to perform calculations, control communication via communication device 1004, and control at least one of reading and writing data in memory 1002 and storage 1003.

[0100] The processor 1001 controls the entire computer by running, for example, an operating system, and may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic unit, a register, and the like.

[0101] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-mentioned embodiments. Furthermore, the various processes described above may be executed by one processor 1001, or may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0102] The memory 1002 is a computer-readable recording medium and may be configured by, for example, at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store a program (program code), a software module, etc., that can execute a method according to an embodiment of the present disclosure.

[0103] Storage 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0104] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, or a communication module.

[0105] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize, for example, at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0106] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0107] Furthermore, each device such as the processor 1001 and the memory 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 each device.

[0108] Furthermore, the device may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0109] Furthermore, the 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 may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0110] Each aspect / embodiment described in the present disclosure may be applied to at least one of a system using Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, a 4th generation mobile communication system (4G), a 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable system, and a next-generation system extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G) may also be applied.

[0111] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0112] In the present disclosure, a specific operation described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, an MME or an S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0113] Information, signals (information, etc.) may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0114] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0115] The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0116] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0117] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0118] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0119] 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 be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0120] Note that 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, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0121] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0122] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0123] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0124] In this disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0125] A base station can accommodate one or more (e.g., three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0126] The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0127] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0128] A mobile station may also be referred to 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 terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0129] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, or the mobile object itself. The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0130] Furthermore, a base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a mobile station is replaced with communication between multiple mobile stations (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the mobile station may be configured to have the functions of a base station. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as uplink channel and downlink channel may be read as side channel.

[0131] Similarly, a mobile station in the present disclosure may be interpreted as a base station, in which case the base station may have the functions of a mobile station. A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0132] Numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by a transceiver in the frequency domain, and specific windowing operations performed by a transceiver in the time domain.

[0133] A slot may consist of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) A slot may be a numerology-based time unit.

[0134] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0135] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0136] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0137] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0138] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0139] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0140] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0141] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0142] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0143] The time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. Each TTI, subframe, etc. may be composed of one or more resource blocks.

[0144] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0145] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0146] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0147] 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 a UE within one carrier.

[0148] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0149] The above-described structures of the radio frame, subframe, slot, minislot, and symbol are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0150] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0151] The reference signal may also be abbreviated as Reference Signal (RS), and may also be called a pilot depending on the applicable standard.

[0152] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0153] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0154] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. 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, a reference to a first and a second element does not imply that only two elements may be employed therein or that the first element must precede the second element in some way.

[0155] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0156] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0157] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0158] 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 "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0159] 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 herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0160] 10. Wireless communication systems 20 NG-RAN 100 gNB 200 UE 210 Radio signal transmitter / receiver 220 Amplifier section 230 Modulation and Demodulation Unit 240 Control signal / reference signal processing section 250 Encoding / Decoding Unit 260 Data transmission and reception unit 270 Control Unit 1001 processor 1002 memory 1003 Storage 1004 Communication equipment 1005 Input Device 1006 Output Device 1007 Bus

Claims

1. A terminal, a transmitting unit that transmits capability information of the terminal regarding whether or not a dynamic instruction for repeated transmission of a physical uplink control channel is applicable; a control unit that assumes that a number of repetitions of the physical uplink control channel is set for each resource used for repeated transmission of the physical uplink control channel in a radio resource control layer; a receiving unit for receiving downlink control information; Equipped with the transmitter repeatedly transmits the physical uplink control channel at the number of repetitions set in the resource indicated by the downlink control information. Terminal.

2. The number of repetitions is included in an information element of the radio resource control layer. The terminal according to claim 1 .

3. the number of repetitions is set to be different for each piece of identification information of the resource; The terminal according to claim 1 .

4. A wireless communication system including a terminal and a wireless base station, The terminal a transmitting unit that transmits capability information of the terminal regarding whether or not a dynamic instruction for repeated transmission of a physical uplink control channel is applicable; a control unit that assumes that a number of repetitions of the physical uplink control channel is set for each resource used for repeated transmission of the physical uplink control channel in a radio resource control layer; a receiving unit for receiving downlink control information; Equipped with the transmitter repeatedly transmits the physical uplink control channel at the number of repetitions set in the resource indicated by the downlink control information. Wireless communication system.

5. A wireless communication method performed by a terminal, Transmitting capability information of the terminal regarding whether a dynamic instruction for repeated transmission of the physical uplink control channel is applicable; It is assumed that, in a radio resource control layer, a number of repetitions of the physical uplink control channel is set for each resource used for repeated transmission of the physical uplink control channel; receiving downlink control information; repeatedly transmitting the physical uplink control channel at the number of repetitions set in the resource indicated by the downlink control information; Wireless communication method.

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