Terminal

Abstract

A terminal is provided with: a reception unit that receives a reference signal; and a transmission unit that transmits a request for repeated transmission of a physical uplink control channel in a random access procedure on the basis of a comparison between the received power of the reference signal and a threshold value.

Description

Technical Field

[0001] The present disclosure relates to a terminal that performs repetitive transmission. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) has standardized the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG), and has also standardized the next generation mobile communication system called Beyond5G, 5GEvolution or 6G.

[0003] In 3GPP, non-terrestrial networks (NTN) are being discussed. NTN is a network that includes flying objects such as satellites, and terminals (User Equipment: UE) can communicate with base stations (next Generation NodeB, gNB) via flying objects. In NTN, repeated transmission is specified for the physical uplink shared channel (PUSCH) during random access, specifically for Msg3 PUSCH (Non-Patent Document 1).

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 38.214 V17.3.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for control (Release 17), 3GPP, September 2022 Summary of the invention

[0007] On the other hand, regarding the physical uplink control channel (PUCCH) in the random access process, specifically, regarding the PUCCH for Hybrid Automatic Repeat Request (HARQ)-ACK, there is no provision for repeated transmission. Therefore, there is a problem that it is unclear how to perform repeated transmission of the PUCCH in the random access process.

[0008] Therefore, the present disclosure has been made in view of such a situation, and an object of the present disclosure is to provide a terminal capable of repeatedly transmitting the PUCCH in a random access procedure.

[0009] One disclosed method is a terminal comprising: a receiving unit (wireless signal transceiver unit 210) that receives a reference signal; and a sending unit (control signal / reference signal processing unit 240) that sends a repeated sending request for a physical uplink control channel in a random access process based on a comparison between the received power of the reference signal and a threshold.

[0010] One disclosed method is a terminal comprising: a receiving unit (wireless signal transceiver unit 210), which receives an indication of repeated transmission of a physical uplink shared channel in a random access process; and a sending unit (control signal / reference signal processing unit 240), which performs repeated transmission of a physical uplink control channel in the random access process based on the indication.

[0011] One disclosed method is a terminal comprising: a receiving unit (wireless signal transceiver unit 210), which receives downlink control information corresponding to a physical downlink shared channel in a random access process; and a sending unit (control signal / reference signal processing unit 240), which repeatedly sends a physical uplink control channel in the random access process based on the downlink control information. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of a wireless communication system.

[0013] Figure 2 is a diagram showing a frequency range used in a wireless communication system.

[0014] Figure 3 This is a diagram showing a structural example of a radio frame, a subframe, a time slot, and a codeword used in a wireless communication system.

[0015] Figure 4 It is a functional block diagram of the terminal.

[0016] Figure 5 is a diagram showing a random access procedure.

[0017] Figure 6 This is a diagram showing a threshold value for repeated transmission request of the PUCCH in the random access procedure.

[0018] Figure 7 It is a diagram showing the presence or absence of a PUSCH repetition transmission request and the presence or absence of a PUCCH repetition transmission request in a preamble.

[0019] Figure 8 It is a functional block diagram of a base station.

[0020] Fig. 9 This is a diagram showing an example of the hardware configuration of a base station and a terminal.

[0021] Fig.10 It is a diagram showing a structural example of a vehicle. DETAILED DESCRIPTION

[0022] Hereinafter, the embodiments will be described based on the drawings. In addition, the same or similar reference numerals are given to the same functions and structures, and their descriptions are appropriately omitted.

[0023] (1) Overall schematic structure of wireless communication system

[0024] Figure 1 The wireless communication system 10 shown is a wireless communication system that complies with a method called 5G. On the other hand, the wireless communication system 10 may also be a wireless communication system that complies with a method called Beyond 5G, 5G Evolution, or 6G.

[0025] The wireless communication system 10 is capable of supporting massive multiple-input multiple-output (Massive MIMO) for generating a more directional beam by controlling wireless signals sent from multiple antenna elements, carrier aggregation (CA) for bundling and using multiple component carriers (CCs), dual connectivity (DC) for simultaneous communication with two base stations, etc.

[0026] like Figure 1 As shown, the wireless communication system 10 includes a NG-RAN (Next Generation-Radio Access Network) 20, a gNB 100 connected to the NG-RAN 20, and a UE 200 that performs wireless communication with the gNB 100. The NG-RAN 20 is connected to a core network (CN) not shown. The NG-RAN 20 and the CN may also be simply referred to as a "network". In addition, the specific structure of the wireless communication system 10, such as the number of gNBs 100 and UEs 200, is not limited to Figure 1 Example shown.

[0027] The wireless communication system 10 of the embodiment includes an aircraft 150 that mediates the communication between the gNB 100 and the UE 200. The aircraft 150 is a satellite such as a GEO (Geostationary Earth Orbit) satellite, a MEO (Middle Earth Orbit) satellite, or a LEO (Low Earth Orbit) satellite. In addition, the aircraft 150 may be a high altitude platform station (HAPS) carried on an airship, a balloon, or the like, or a commercial aircraft (Air to Ground (ATG)). The aircraft 150 becomes a relay station in the communication between the gNB 100 and the UE 200.

[0028] In addition, the wireless communication system 10 may support multiple frequency ranges (FRs). Figure 2 As shown, the following FRs can be supported.

[0029] FR1: 410MHz~7.125GHz

[0030] FR2-1: 24.25 GHz to 52.6 GHz

[0031] FR2-2: more than 52.6 GHz ~ 71 GHz

[0032] In FR1, a subcarrier spacing (SCS) of 15, 30 or 60 kHz and a bandwidth (BW) of 5 to 100 MHz can be used. In FR2-1, an SCS of 60 or 120 kHz (including 240 kHz) and a BW of 50 to 400 MHz can be used.

[0033] In FR2-2, in order to avoid an increase in phase noise, cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) or discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) with a larger SCS can be applied.

[0034] In addition, in the wireless communication system 10, if Figure 3 As shown in FIG. 1 , 1 time slot consists of 14 symbols. When maintaining this structure, the larger (wider) the SCS is, the shorter the symbol period (and the time slot period) is. In addition, the SCS is not limited to Figure 3 The frequency shown may be, for example, 480 kHz, 960 kHz, etc.

[0035] Furthermore, the number of symbols constituting one time slot does not necessarily have to be 14 symbols, and may be, for example, 28 or 56. Furthermore, the number of time slots per subframe may differ depending on the SCS.

[0036] (2) Functional block structure of wireless communication system

[0037] (2.1) Functional block structure of the terminal

[0038] like Figure 4 As shown, UE 200 includes a radio signal transceiver unit 210 , an amplifier unit 220 , a modulation and demodulation unit 230 , a control signal and reference signal processing unit 240 , an encoding and decoding unit 250 , a data transceiver unit 260 , and a control unit 270 .

[0039] The wireless signal transceiver 210 transmits and receives wireless signals to and from the gNB 100. The wireless signal transceiver 210 may constitute a transmitter that transmits wireless signals to the gNB 100 and a receiver that receives wireless signals from the gNB 100. The wireless signals include control signals, reference signals, and data.

[0040] The wireless signal transceiver 210 of the embodiment can receive a reference signal (RS).

[0041] The wireless signal transceiver 210 according to the embodiment can receive an instruction for repeated transmission of the PUCCH in the random access procedure.

[0042] Here, refer to Figure 5 , the random access process is briefly described. First, UE 200 sends a physical random access channel (PRACH) for the SS / PBCH block (SSB) received from gNB 100 (corresponding to Msg1 in the figure). Second, UE 200 receives a physical downlink shared channel (PDSCH) as a random access response (RandomAccess Response: RAR) (corresponding to Msg2 in the figure). Third, UE 200 sends PUSCH as an RRC connection request (corresponding to Msg3 in the figure). Fourth, UE 200 receives PDSCH as contention resolution (corresponding to Msg4 in the figure). Finally, UE 200 sends PUCCH as HARQ-ACK for Msg4 (corresponding to HARQ ACK in the figure).

[0043] The PUCCH in the random access process may be a PUCCH using common PUCCH resources without setting dedicated PUCCH resources. In addition, such a PUCCH may be referred to as HARQ-ACK PUCCH, PUCCH for HARQ-ACK, PUCCH for Msg4 HARQ-ACK, or PUCCH X. Hereinafter, it is mainly recorded as HARQ-ACK PUCCH in the specification and marked as PUCCH X in the figure. In addition, "PUCCH" may refer to PUCCH transmission, that is, "HARQ-ACK PUCCH" may refer to HARQ-ACK PUCCH transmission.

[0044] The indication of repeated transmission of HARQ-ACK PUCCH may include the number of repetitions of PUCCH. In addition, the number of repetitions may be referred to as a repetition factor. The repetition factor may also be replaced by "to perform repetition".

[0045] The indication of repeated transmission of HARQ-ACK PUCCH may be an indication of repeated transmission of PUSCH (Msg3PUSCH) in the random access process. Specifically, the number of repetitions of PUCCH may be determined based on the number of repetitions of PUSCH included in the indication of repeated transmission of PUSCH. For example, when the number of repetitions of PUCCH is set to M and the number of repetitions of PUSCH is set to N, the relationship between M and N may be defined or set as shown in the following formula. In addition, Y in the following formula is an arbitrary constant.

[0046] M=N / Y

[0047] M=NY

[0048] M=N

[0049] The relationship between M and N may be defined or set via radio resource control (RRC) signaling or medium access control (MAC) signaling. In addition, the RRC signaling may be a system information block (SIB). The MAC signaling may be a medium access control control element (MAC CE) included in Msg2 in the random access procedure.

[0050] In addition, if Figure 5As shown in FIG. 1 , the indication of repeated transmission of the HARQ-ACK PUCCH may be the (scheduled) downlink control information (DCI) corresponding to the PDSCH in the random access process. In addition, the PDSCH in the random access process referred to here is Msg4 PDSCH. The field of the DCI containing the indication of repeated transmission of the HARQ-ACK PUCCH may be the following field. In addition, it is also possible not to perform Figure 5 For example, a PUCCH repetition request may be performed only in one of Msg1 and Msg3.

[0051] It can be the Modulation and Coding Scheme (MCS) information field. In this case, Z M The most significant bit (MSB) can indicate the number of repetitions of PUCCH, Z L The least significant bit (LSB) may indicate the MCS used by Msg4 PDSCH.

[0052] It may be a cyclic redundancy check (CRC)-scrambled radio network temporary identifier (RNTI). In this case, multiple TC (Temporary Cell)-RNTIs may be set, and each TC-RNTI indicates a different number of repetitions of the PUCCH.

[0053] It can be the HARQ process number field. In this case, Z M The MSB can indicate the number of repetitions of PUCCH, Z L The LSB may represent the HARQ process number (HARQ process number).

[0054] It can be the "DCI format identifier" field. In this case, 0 can indicate repeated transmission of HARQ-ACK PUCCH, and 1 can indicate no repeated transmission of HARQ-ACK PUCCH. In addition, 0 can be associated with the number of repetitions of PUCCH defined or set via RRC signaling or medium access control MAC signaling. In addition, RRC signaling can be SIB. MAC signaling can be MAC CE included in Msg2 in the random access process.

[0055] It may be a new DCI field indicating the number of repetitions of the PUCCH. In this case, the new DCI field may exist only when a request for repeated transmission of the HARQ-ACK PUCCH is sent, or may exist only when a request for repeated transmission of the Msg3 PUSCH is indicated and performed.

[0056] It may not be DCI format 1_0 but a new DCI format. In this case, the repeated transmission indication field may be set.

[0057] As described above, the indication of repeated transmission of the HARQ-ACK PUCCH may be an indication of repeated transmission of the Msg3 PUSCH or a DCI corresponding to the Msg4 PDSCH. Such an indication of repeated transmission may be applied only when a request for repeated transmission of the HARQ-ACK PUCCH is transmitted via the Msg3 PUSCH.

[0058] The amplifier unit 220 is composed of a power amplifier (PA) / a low noise amplifier (LNA) etc. The amplifier unit 220 amplifies the wireless signal output from the wireless signal transceiver unit 210 . In addition, the amplifier unit 220 amplifies the wireless signal output from the modem unit 230 .

[0059] The modem unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication target (gNB 100 or other gNB). In the modem unit 230, CP-OFDM / DFT-S-OFDM can be applied. In addition, DFT-S-OFDM can be used not only for uplink (UL) but also for downlink (DL).

[0060] The control signal / reference signal processing unit 240 performs processing related to control signals sent and received between the gNB 100, such as radio resource control (RRC) signaling.

[0061] The control signal and reference signal processing unit 240 performs processing related to reference signals transmitted and received between the gNB 100, such as the demodulation reference signal (DMRS) and the phase tracking reference signal (PTRS). DMRS is a reference signal for the purpose of channel estimation. PTRS is a reference signal for the purpose of phase noise correction.

[0062] The control signal / reference signal processing unit 240 of the implementation mode can send a repeated transmission request of the HARQ-ACK PUCCH based on the comparison of the reference signal received power (Reference Signal Received Power: RSRP) received by the wireless signal transceiver unit 210 of the implementation mode with the threshold value described later. For example, when the RSRP is lower than the threshold value, a repeated transmission request of the HARQ-ACK PUCCH can be sent. In addition, RSRP can also be referred to as RSRP of DL pathloss (PL) reference. In addition, the repeated transmission request may refer to the scheduling of requesting repeated transmission. In addition, the execution of the repeated transmission request may also be determined based on something other than RSRP. In addition, the reference signal may be any DL signal, may be SSB, may be DMRS or CSI-RS.

[0063] like Figure 6 As shown, the threshold value may be the same threshold value as the threshold value (rsrp-Threshold-Msg3Rep in the figure) that is the basis for sending the repeated transmission request of Msg 3PUSCH. In addition, when RSRP is lower than rsrp-Threshold-Msg3Rep, the repeated transmission request of Msg 3PUSCH is sent by the control signal / reference signal processing unit 240 via PRACH.

[0064] In addition, the threshold value may be a threshold value different from rsrp-Threshold-Msg3Rep. In this case, the threshold value may be set independently from rsrp-Threshold-Msg3Rep as a threshold value for repeatedly sending a request for sending a HARQ-ACK PUCCH (rsrp-Threshold-PUCCHRep-Msg4HARQ in the figure).

[0065] In addition, multiple thresholds can be defined / set. For example, rsrp-Threshold-Msg3Rep and rsrp-Threshold-PUCCHRep-Msg4HARQ can be defined / set. Each threshold can be defined / set, for example, based on a repetition factor. For example, rsrp-Threshold-PUCCHRep-Msg4HARQ-rep2 can be defined as a threshold for 2 repeated transmissions, rsrp-Threshold-PUCCHRep-Msg4HARQ-rep4 can be defined as a threshold for 4 repeated transmissions, and rsrp-Threshold-PUCCHRep-Msg4HARQ-rep8 can be defined as a threshold for 8 repeated transmissions.

[0066] The control signal / reference signal processing unit 240 of the implementation mode can send a request for repeated transmission of HARQ-ACK PUCCH in the same manner as the request for repeated transmission of Msg3 PUSCH, i.e., via PRACH. In this case, the control signal / reference signal processing unit 240 can send a request for repeated transmission of HARQ-ACK PUCCH when sending the above-mentioned request for repeated transmission of Msg 3 PUSCH. That is, it can mean that when PRACH is sent via a PRACH resource (PRACH resource) or PRACH occasion (PRACH occasion) associated with the request for repeated transmission of Msg 3 PUSCH, repeated transmission of HARQ-ACK PUCCH is simultaneously requested.

[0067] On the other hand, Figure 7 As shown, the PRACH resource or PRACH occasion associated with the repeated transmission request of HARQ-ACK PUCCH can be defined independently of the PRACH resource or PRACH occasion associated with the repeated transmission request of Msg 3PUSCH (for example, using different parameters). However, there may also be PRACH resources or PRACH occasions associated with both the repeated transmission request of HARQ-ACK PUCCH and the repeated transmission request of Msg 3PUSCH. In addition, Figure 7 The preamble index of the PRACH is shown, and whether or not to request repeated transmission of the Msg 3 PUSCH and / or repeated transmission of the HARQ-ACK PUCCH is associated with the preamble index.

[0068] exist Figure 7In the figure, the shaded spaces at both ends indicate that there is no repeated transmission request for Msg 3PUSCH (and repeated transmission request for HARQ-ACKPUCCH). The shaded space on the left side of the center indicates that there is only a repeated transmission request for Msg 3PUSCH. The shaded space on the right side of the center indicates that there is a repeated transmission request for Msg 3PUSCH and a repeated transmission request for HARQ-ACK PUCCH. startPreambleForThisPartition in the figure indicates the starting number of the preamble code index used for the repeated transmission request for Msg 3PUSCH, numberOfPreamblesForTh isPartition indicates the number of preamble code indexes used for the repeated transmission request for Msg 3PUSCH, and the consecutive preamble code indexes starting from this starting number are used for the repeated transmission request for Msg 3PUSCH. Although not shown, startPreambleForThisPartition-Msg4HARQ-ACK and numberOfPreamblesForThisPartition-Msg4HARQ-ACK may be similarly defined and used to determine the preamble index used for the repeated transmission request of the HARQ-ACK PUCCH.Also, although not shown, only the repeated transmission request of the HARQ-ACK PUCCH may be used.

[0069] The control signal·reference signal processing unit 240 of the implementation mode can send a request for repeated transmission of HARQ-ACK PUCCH in a different transmission method from the request for repeated transmission of Msg3 PUSCH, for example, via Msg 3PUSCH. That is, the control signal·reference signal processing unit 240 can send a request for repeated transmission of Msg 3PUSCH via PRACH and send a request for repeated transmission of HARQ-ACK PUCCH via Msg 3PUSCH. Specifically, the request for repeated transmission of HARQ-ACK PUCCH can be sent via MAC signaling (e.g., MACCE) / RRC signaling of Msg 3PUSCH. In addition, the request for repeated transmission of HARQ-ACK PUCCH can be sent via PHY signaling of Msg 3PUSCH (e.g., uplink control information (UCI), scrambling-related information, RNTI-related information contained in Msg 3PUSCH).

[0070] In this way, the control signal / reference signal processing unit 240 can constitute a transmission unit that transmits a repetitive transmission request of the HARQ-ACK PUCCH.

[0071] Furthermore, the control signal / reference signal processing unit 240 according to the embodiment can perform repeated transmission of the HARQ-ACK PUCCH based on the instruction of repeated transmission of the HARQ-ACK PUCCH received by the radio signal transmission / reception unit 210 according to the embodiment.

[0072] In this way, the control signal / reference signal processing unit 240 can constitute a transmission unit that repeatedly transmits the HARQ-ACK PUCCH.

[0073] In addition, the control signal and reference signal processing unit 240 of the embodiment may perform repeated transmission request of HARQ-ACK PUCCH / repeated transmission of HARQ-ACK PUCCH only when UE 200 satisfies the condition A shown below. In other words, the control signal and reference signal processing unit 240 of the embodiment may not perform repeated transmission request of HARQ-ACK PUCCH / repeated transmission of HARQ-ACK PUCCH when UE 200 satisfies the condition B shown below. In addition, the condition may be replaced by the type of UE.

[0074] (Condition A)

[0075] Handheld UE

[0076] UE with 23dBm TX power and / or 0 or less antenna gain

[0077] UE with a specific UE Capability

[0078] (Condition B)

[0079] Very Small Aperture Terminal (VSAT) UE

[0080] UE with higher than 23dBm TX power and / or larger than 0 or less antenna gain

[0081] UE without a specific UE Capability

[0082] In addition, VSAT UE is an earth station equipped with a relatively small antenna used in satellite communications.

[0083] In addition, the control signal / reference signal processing unit 240 of the embodiment may change the number of repetitions of the PUCCH in the repeated transmission of the HARQ-ACK PUCCH when the UE 200 satisfies condition A and when the UE 200 satisfies condition B. In other words, the indication of the repeated transmission of the HARQ-ACK PUCCH (and the number of repetitions of the PUCCH) set / instructed by the gNB 100 and received by the wireless signal transceiver unit 210 may be different in the UE 200 that satisfies condition A and the UE 200 that satisfies condition B. For example, regarding the parameters related to the repeated transmission of the HARQ-ACK PUCCH (e.g., the parameters related to the number of repetitions), the parameters for the UE 200 that satisfies condition A and the parameters for the UE 200 that satisfies condition B may be defined / set as different parameters.

[0084] In addition, the control signal / reference signal processing unit 240 of the embodiment can transmit capability information of UE 200 such as UE capability (UECapability). The capability information of UE 200 is, for example, capability information related to repeated transmission of HARQ-ACK PUCCH. The control signal / reference signal processing unit 240 can report the capability information related to repeated transmission of HARQ-ACK PUCCH to gNB 100 as follows.

[0085] The capability information may be reported as the same capability information as the repeated transmission of Msg1 PRACH / Msg3 PUSCH, or may be transmitted as capability information different from the repeated transmission of Msg1 PRACH / Msg3 PUSCH.

[0086] When reporting support for repeated transmission of HARQ-ACK PUCCH, support for repeated transmission of Msg1PRACH / Msg3PUSCH may be reported. That is, supporting repeated transmission of Msg1PRACH / Msg3PUSCH may be a prerequisite for supporting repeated transmission of HARQ-ACKPUCCH.

[0087] When reporting support for repeated transmission of Msg1 PRACH / Msg3 PUSCH, support for repeated transmission of HARQ-ACK PUCCH may be reported. That is, supporting repeated transmission of HARQ-ACK PUCCH may be a prerequisite for supporting repeated transmission of Msg1 PRACH / Msg3PUSCH.

[0088] Support for repeated transmission of the HARQ-ACK PUCCH may be reported only for the frequency band defined for NTN (communication intermediated to satellite, HAPS, and ATG).

[0089] In the case of reporting support for repeated transmission of HARQ-ACK PUCCH, it can be reported that at least support is provided for calculating UE specific Timing Advance (TA) and frequency based on GNSS-based location information and the satellite orbit of the serving cell.

[0090] The encoding / decoding unit 250 performs segmentation / concatenation and encoding / decoding of the data contained in the wireless signal for each predetermined communication target (gNB 100 or other gNB).

[0091] Specifically, the encoding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230 and concatenates the decoded data. In addition, the encoding / decoding unit 250 divides the data output from the data transceiver unit 260 into predetermined sizes and encodes the divided data.

[0092] The data transceiver unit 260 transmits and receives data to and from the gNB 100. Specifically, the data transceiver unit 260 performs assembly / disassembly of protocol data units (PDU) / service data units (SDU) between multiple layers. The multiple layers are the medium access control (MAC) layer, the radio link control (RLC) layer, the packet data convergence protocol (PDCP) layer, etc. In addition, the data transceiver unit 260 performs error correction and retransmission control of data based on the hybrid automatic repeat request (HARQ).

[0093] The control unit 270 controls the UE 200. For example, the control unit 270 controls the transmission and reception of wireless signals by the wireless signal transceiver unit 210, the amplification by the amplifier unit 220, the data modulation / demodulation by the modem unit 230, the signal processing by the control signal / reference signal processing unit 240, the encoding / decoding by the encoding / decoding unit 250, and the transmission and reception of data by the data transceiver unit 260.

[0094] (2.2) Functional block structure of base station

[0095] like Figure 8 As shown, the gNB 100 includes a wireless signal transceiver unit 110 and a control unit 120.

[0096] The radio signal transceiver 110 transmits and receives radio signals to and from the UE 200. The radio signal transceiver 110 may constitute a transmitter that transmits radio signals to the UE 200 and a receiver that receives radio signals from the UE 200.

[0097] The control unit 120 controls the gNB 100. For example, the control unit 120 controls the transmission and reception of wireless signals performed by the wireless signal transceiver unit 210.

[0098] (3)Topics

[0099] (3.1) Topic 1

[0100] There is no provision for repeated transmission of the PUCCH in the random access procedure, that is, the HARQ-ACK PUCCH. Therefore, there is a problem that it is unclear how to preferably request repeated transmission of the HARQ-ACK PUCCH.

[0101] (3.2) Topic 2

[0102] There is no provision for repeated transmission of the PUCCH in the random access procedure, that is, the HARQ-ACK PUCCH, and therefore, it is not possible to meet the demand for reducing the signaling overhead associated with repeated transmission of the HARQ-ACK PUCCH.

[0103] (3.3) Topic 3

[0104] There is no provision for repeated transmission of the PUCCH in the random access procedure, that is, the HARQ-ACK PUCCH, and therefore, it is not possible to meet the demand for flexible configuration for repeated transmission of the HARQ-ACK PUCCH.

[0105] (3.4) Topic 4

[0106] There is no provision for repeated transmission of the PUCCH in the random access procedure, that is, the HARQ-ACK PUCCH, and therefore, it is not possible to meet the demand for repeated transmission of the HARQ-ACK PUCCH according to the type of UE.

[0107] (4) Operation Example of Wireless Communication System

[0108] (4.1) Action Example 1

[0109] The radio signal transceiver unit 210 receives a reference signal from the gNB 100. The control signal and reference signal processing unit 240 compares the received power of the reference signal, namely, RSRP, with a threshold value, and when RSRP is lower than the threshold value, transmits a request for repeated transmission of the PUCCH, namely, the HARQ-ACK PUCCH, in the random access process to the gNB 100. The threshold value may be the same as the threshold value that serves as a reference for repeatedly transmitting the PUSCH, namely, the Msg3 PUSCH, in the random access process.

[0110] like Figure 5 As shown, the control signal / reference signal processing unit 240 may send a request for repeated transmission of the HARQ-ACK PUCCH via the PRACH, and may also send a request for repeated transmission of the HARQ-ACK PUCCH via the PUSCH. In addition, when sending a request for repeated transmission of the HARQ-ACK PUCCH via the PRACH, a request for repeated transmission of the Msg3 PUSCH may be sent in the PRACH. That is, the control signal / reference signal processing unit 240 may send at least one of a request for repeated transmission of the HARQ-ACK PUCCH and a request for repeated transmission of the Msg3 PUSCH via the PRACH.

[0111] (4.2) Action Example 2

[0112] The wireless signal transceiver unit 210 receives an indication of repeated transmission of PUSCH, i.e., Msg3 PUSCH, during the random access process from gNB 100. Based on the indication of repeated transmission of Msg3 PUSCH, the control signal and reference signal processing unit 240 repeatedly transmits HARQ-ACK PUCCH to gNB 100. Specifically, based on the relationship between the number of repetitions of Msg3PUSCH and the number of repetitions of HARQ-ACKPUCCH, HARQ-ACK PUCCH is repeatedly transmitted to gNB 100.

[0113] (4.3) Action Example 3

[0114] The wireless signal transceiver unit 210 receives DCI corresponding to the PDSCH in the random access process, that is, Msg4PDSCH, from the gNB 100. The control signal and reference signal processing unit 240 repeatedly transmits the HARQ-ACK PUCCH to the gNB 100 based on the DCI.

[0115] (4.4) Action Example 4

[0116] (4.4.1) Action Example 4.1

[0117] In the above-mentioned action examples 1, 2, and 3, the control signal / reference signal processing unit 240 performs repeated transmission request / repeated transmission of HARQ-ACK PUCCH to the gNB 100 only when the above-mentioned condition A is satisfied. In other words, the control signal / reference signal processing unit 240 does not perform repeated transmission request / repeated transmission of HARQ-ACK PUCCH to the gNB 100 when the above-mentioned condition B is satisfied.

[0118] (4.4.2) Action Example 4.2

[0119] In the above-mentioned action examples 2 and 3, the control signal / reference signal processing unit 240 can change the number of repetitions of HARQ-ACK PUCCH repetition transmissions to the gNB 100 when the above-mentioned condition A is satisfied and when the above-mentioned condition B is satisfied. In other words, in the UE 200 satisfying condition A and the UE 200 satisfying condition B, the indication of repetition transmission of HARQ-ACK PUCCH (and the number of repetitions of PUCCH) set / instructed by the gNB 100 and received by the wireless signal transceiver unit 210 can be different.

[0120] (5) Action and Effect

[0121] The UE 200 of the above-described embodiment can compare RSRP with a threshold value, and when RSRP is lower than the threshold value, transmit a request for repeated transmission of PUCCH, i.e., HARQ-ACK PUCCH, in the random access process to the gNB 100. The threshold value may be the same as the threshold value that serves as a reference for repeatedly transmitting a request for repeated transmission of PUSCH, i.e., Msg3 PUSCH, in the random access process. Thus, resources for setting a new threshold value can be reduced.

[0122] The UE 200 of the above-mentioned embodiment can send a repeated transmission request of the HARQ-ACK PUCCH to the gNB 100 via the PRACH. Thus, the repeated transmission request of the HARQ-ACK PUCCH can be sent together with the repeated transmission request of the Msg3 PUSCH, thereby reducing the signaling overhead and the load of the UE 200. In addition, the load of the UE 200 can also be replaced by the UE complexity of the UE 200.

[0123] The UE 200 of the above-described embodiment can send a request for repeated transmission of the HARQ-ACK PUCCH to the gNB 100 via the PUSCH. As a result, the request for repeated transmission of the HARQ-ACK PUCCH can be sent independently of the request for repeated transmission of the Msg3 PUSCH, so that resources can be used efficiently.

[0124] The UE 200 of the above-mentioned embodiment can repeatedly transmit the HARQ-ACK PUCCH to the gNB 100 based on the indication of repeated transmission of the Msg3 PUSCH. Thus, the signaling overhead can be reduced.

[0125] The UE 200 of the above-mentioned embodiment repeatedly transmits the HARQ-ACK PUCCH to the gNB 100 based on the DCI. Thus, it is possible to flexibly indicate the repeated transmission of the HARQ-ACK PUCCH.

[0126] The UE 200 of the above-described embodiment can determine whether to repeatedly transmit the HARQ-ACK PUCCH to the gNB 100 based on a condition, that is, the type of the UE 200. Thus, only the UE 200 that needs to repeatedly transmit performs the repeated transmission, which is efficient.

[0127] (6) Other Implementation Methods

[0128] Although the contents of the present invention have been described above based on the embodiments, it is obvious to those skilled in the art that the present invention is not limited to these descriptions and various modifications and improvements can be made.

[0129] In the above disclosure, the repeated transmission of HARQ-ACK PUCCH is mainly associated with the repeated transmission of Msg3 PUSCH, but is not limited to this. It can also be associated with the repeated transmission of MsgA, Msg1, and Msg2. That is, the repeated transmission of Msg3PUSCH in the above disclosure can also be replaced by the repeated transmission of MsgA, Msg1, and Msg2.

[0130] The above-mentioned operation examples may be combined and applied in a complex manner as long as no contradiction occurs.

[0131] In the above disclosure, configure, activate, update, indicate, enable, specify, and select may be used interchangeably. Similarly, link, associate, correspond, and map may be used interchangeably, and allocate, assign, monitor, and map may be used interchangeably.

[0132] Furthermore, specific, dedicated, UE-specific, and UE-dedicated may be used interchangeably. Similarly, common, shared, group-common, UE-common, and UE-shared may be used interchangeably.

[0133] The block diagram used in the description of the above-mentioned embodiment ( Figure 4 and Figure 8 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using one device that is physically or logically combined, or it can be implemented by connecting two or more physically or logically separated devices directly or indirectly (for example, using wires, wirelessly, etc.) and using these multiple devices. The functional blocks can also be implemented by combining software in the above-mentioned one device or the above-mentioned multiple devices.

[0134] Functions include judging, determining, judging, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that performs a sending function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0135] Furthermore, the above-mentioned gNB 100 and UE 200 (the device) can also function as computers that process the wireless communication method disclosed in the present invention. Fig. 9 FIG. 1 is a diagram showing an example of the hardware structure of the device. Fig. 9 As shown, the device may also 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, and a bus 1007.

[0136] In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware structure of the device may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0137] Each functional block of the device (refer to Figure 4 as well as Figure 8 ) is implemented by any hardware element or combination of hardware elements in the computer device.

[0138] In addition, each function in the device is implemented by the following method: predetermined software (program) is read into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of the reading and writing of data in memory 1002 and storage 1003.

[0139] The processor 1001 controls the entire computer by, for example, running an operating system. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, registers, and the like.

[0140] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a part of the actions described in the above embodiment is used. In addition, the above-mentioned various processes can be performed by one processor 1001, or by two or more processors 1001 simultaneously or sequentially. The processor 1001 can also be implemented by one or more chips. In addition, the program can also be sent from the network via a telecommunication line.

[0141] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), etc. The memory 1002 may be referred to as a register, a cache memory, a main memory (main storage device), etc. The memory 1002 may store a program (program code), a software module, etc. that can execute the method according to an embodiment of the present disclosure.

[0142] The memory 1003 is a computer-readable recording medium, and may be composed of at least one of a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The memory 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server, and other appropriate media including at least one of the memory 1002 and the memory 1003.

[0143] The communication device 1004 is hardware (transceiver) used to communicate 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, etc.

[0144] The communication device 1004 may be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD).

[0145] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0146] In addition, the processor 1001 and the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or different buses may be used between the devices.

[0147] 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), a field programmable gate array (FPGA), etc., and a part or all of each functional block may be implemented by the hardware. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0148] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information: DCI), uplink control information (Uplink Control Information: UCI), high-level signaling (e.g., RRC signaling, medium access control (Medium Access Control: MAC) signaling, broadcast information (Master Information Block: MIB, System Information Block: SIB)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0149] Each form / embodiment described in the present disclosure may be applied to at least one of a system using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 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, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may be applied.

[0150] The processing procedures, timings, processes, etc. of each form / implementation described in this disclosure may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0151] In the present disclosure, specific actions performed by a base station are sometimes also performed by its upper node according to the situation. In a network composed of one or more network nodes having a base station, various actions performed to communicate with a terminal can be performed by at least one of the base station and other network nodes other than the base station (for example, MME or S-GW, etc., but not limited to these). In the above, the case where there is one other network node other than the base station is illustrated, but it can also be a combination of multiple other network nodes (for example, MME and S-GW).

[0152] It is possible to output information, signals (information, etc.) from a higher layer (or lower layer) to a lower layer (or higher layer). It is also possible to input and output via multiple network nodes.

[0153] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0154] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0155] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched depending on the execution. In addition, notification of predetermined information (e.g., notification of "yes X") is not limited to being performed explicitly, but may also be performed implicitly (e.g., not notifying the predetermined information).

[0156] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0157] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0158] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0159] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0160] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0161] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, a wireless resource may be indicated by an index.

[0162] The names used for the above parameters are non-restrictive names in any respect. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in the present disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any appropriate names, and therefore the various names assigned to these various channels and information elements are non-restrictive names in any respect.

[0163] In the present disclosure, the terms "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Sometimes, the base station is also referred to as macro cell, small cell, femto cell, pico cell and the like.

[0164] A base station can accommodate one or more (e.g., 3) 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, each of which can also provide communication services through a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head: RRH)).

[0165] The terms "cell" or "sector" refer to a part or the entirety of a coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0166] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0167] For mobile stations, those skilled in the art sometimes also use the following terms: 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 appropriate terms.

[0168] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0169] In addition, the base station in the present disclosure may also be replaced by a mobile station (user terminal, the same below). For example, various forms / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a mobile station is replaced by communication between multiple mobile stations (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, it may also be configured such that the mobile station has the functions of the base station. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0170] Likewise, the mobile station in the present disclosure may be replaced by a base station. In this case, the base station may have the same functions as the mobile station.

[0171] A radio frame may be composed of one or more frames in the time domain. In the time domain, one or more frames may be referred to as subframes.

[0172] A subframe may also be composed of one or more time slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) that is independent of a numerology.

[0173] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may, for example, represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transceiver in the frequency domain, a specific windowing process performed by a transceiver in the time domain, and the like.

[0174] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0175] A time slot may contain multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in units of time greater than a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type B.

[0176] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may be referred to by other corresponding names.

[0177] For example, one subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may be referred to as a TTI, and one time slot or one mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI may not be referred to as a subframe, but as a time slot, a mini time slot, or the like.

[0178] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules the allocation of wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI. In addition, the definition of TTI is not limited to this.

[0179] TTI can be a transmission time unit of data packets (transport blocks), code blocks, code words, etc. after channel coding, or a processing unit such as scheduling and link adaptation. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0180] In addition, when one time slot or one mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can be the minimum time unit for scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit for scheduling can be controlled.

[0181] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0182] In addition, for a long TTI (for example, a normal TTI, a subframe, etc.), it can be replaced with a TTI having a time length exceeding 1ms, and for a short TTI (for example, a shortened TTI, etc.), it can be replaced with a TTI having a TTI length smaller than the long TTI (longTTI) and greater than 1ms.

[0183] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may include one or more consecutive subcarriers. The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0184] In addition, the time domain of an RB may include one or more symbols, and may be the length of one slot, one mini slot, one subframe, or one TTI. One TTI, one subframe, etc. may be composed of one or more resource blocks, respectively.

[0185] In addition, one or more RBs may also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, and the like.

[0186] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0187] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) represents a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB can be identified by the index of the RB relative to the common reference point of the carrier. PRBs can be defined in a BWP and numbered within the BWP.

[0188] 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.

[0189] At least one of the set BWPs may be active, and the UE may not assume that a predetermined signal / channel is transmitted or received outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

[0190] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and the like may be changed in various ways.

[0191] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, two elements may be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible) region may be used to "connect" or "couple" to each other.

[0192] The reference signal may be referred to as Reference Signal (RS) for short, or may be referred to as a pilot signal depending on the applicable standard.

[0193] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise explicitly stated. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0194] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section”, “circuit”, “device” or the like.

[0195] Any reference to an element using the designations "first," "second," etc. used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used there, or that the first element must be before the second element in some form.

[0196] When the terms "include", "including" and their variations are used in the present disclosure, these terms are intended to be inclusive, just like the term "comprising". Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0197] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure also includes a case where the noun following the article is in a plural form.

[0198] The terms "determining" and "determining" used in this disclosure sometimes include a variety of actions. "Determining" and "determining" may include, for example, considering matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "determined" or "determined", etc. In addition, "determining" and "determining" may include matters that have been received (for example, receiving information), transmitted (for example, transmitting information), input, output, accessed (for example, accessed data in memory) as matters that have been "determined" or "determined", etc. In addition, "determining" and "determining" may include matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "determined" or "determined". That is, "judgment" and "decision" may include certain actions that are considered to be "judged" or "decided". In addition, "judgment (decision)" may also be replaced by "assuming", "expecting", "considering", etc.

[0199] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". In addition, the term may mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0200] Fig.10 FIG. 2 shows a structural example of a vehicle 2001. Fig.10 As shown, the vehicle 2001 has a driving unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a gear lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012 and a communication module 2013.

[0201] Driving unit 2002 is constituted by, for example, an engine, a motor, or a hybrid power of an engine and a motor.

[0202] The steering unit 2003 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on an operation of the steering wheel operated by a user.

[0203] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2027 provided in the vehicle are input to the electronic control unit 2010. The electronic control unit 2010 may also be referred to as an ECU (Electronic Control Unit).

[0204] Signals from various sensors 2021 to 2028 include a current signal from a current sensor 2021 for sensing the current of a motor, a speed signal of the front and rear wheels obtained from a speed sensor 2022, an air pressure signal of the front and rear wheels obtained from an air pressure sensor 2023, a vehicle speed signal obtained from a vehicle speed sensor 2024, an acceleration signal obtained from an acceleration sensor 2025, an accelerator pedal depression amount signal obtained from an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained from a brake pedal sensor 2026, a shift lever operation signal obtained from a shift lever sensor 2027, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained from an object detection sensor 2028, and the like.

[0205] The information service unit 2012 is composed of various devices such as a car navigation system, an audio system, a speaker, a television, and a radio for providing various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 provides various multimedia information and multimedia services to passengers of the vehicle 1 using information obtained from external devices via the communication module 2013 and the like.

[0206] The driving assistance system unit 2030 is composed of various devices for preventing accidents or reducing the driver's driving load, such as millimeter wave radar, LiDAR (Light Detection and Ranging), camera, positioning device (such as GNSS, etc.), map information (such as high-definition (HD) map, autonomous driving vehicle (AV) map, etc.), gyroscope system (such as IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, AI processor, and one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 sends and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0207] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 1 via the communication port. For example, the communication module 2013 can send and receive data with the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the left and right front wheels 2007, the left and right rear wheels 2008, the axle 2009, the microprocessor 2031 in the electronic control unit 2010, the memory (ROM, RAM) 2032, and the sensors 2021 to 2028 of the vehicle 2001 via the communication port 2033.

[0208] The communication module 2013 can be controlled by the microprocessor 2031 of the electronic control unit 2010, and is a communication device that can communicate with an external device. For example, various information can be sent and received with the external device via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. The external device can also be, for example, a base station, a mobile station, etc.

[0209] The communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to the external device via wireless communication. In addition, the communication module 2013 also transmits the rotation speed signal of the front and rear wheels obtained by the rotation speed sensor 2022, the air pressure signal of the front and rear wheels obtained by the air pressure sensor 2023, the vehicle speed signal obtained by the vehicle speed sensor 2024, the acceleration signal obtained by the acceleration sensor 2025, the accelerator pedal stepping amount signal obtained by the accelerator pedal sensor 2029, the brake pedal stepping amount signal obtained by the brake pedal sensor 2026, the shift lever operation signal obtained by the shift lever sensor 2027, and the detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028 to the external device via wireless communication.

[0210] The communication module 2013 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) sent from an external device and displays it on the information service unit 2012 of the vehicle. In addition, the communication module 2013 stores various information received from the external device in the memory 2032 that can be used by the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the gear lever 2006, the left and right front wheels 2007, the left and right rear wheels 2008, the axle 2009, the sensors 2021 to 2028, etc. of the vehicle 2001 based on the information stored in the memory 2032.

[0211] The present disclosure is described in detail above, but it should be 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 implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0212] (Note)

[0213] The above disclosure can also be expressed as follows.

[0214] A first feature is a terminal including: a receiving unit that receives a reference signal; and a transmitting unit that transmits a repeated transmission request of a physical uplink control channel in a random access procedure based on a comparison between reception power of the reference signal and a threshold.

[0215] According to a second feature, in the first feature, the threshold is a threshold that serves as a reference for transmitting a request for repeated transmission of a physical uplink shared channel in the random access procedure.

[0216] The third feature is that in the first feature or the second feature, the transmitting unit transmits at least one of the repeated transmission request of the physical uplink control channel and the repeated transmission request of the physical uplink shared channel via a physical random access channel.

[0217] According to a fourth feature, in the first feature or the second feature, the transmitting unit transmits the repeated transmission request of the physical uplink control channel via a physical uplink shared channel in the random access procedure.

[0218] The fifth feature is a terminal comprising: a receiving unit that receives an instruction for repeatedly transmitting a physical uplink shared channel in a random access procedure; and a transmitting unit that repeatedly transmits a physical uplink control channel in the random access procedure based on the instruction.

[0219] The sixth feature is a terminal comprising: a receiving unit that receives downlink control information corresponding to a physical downlink shared channel in a random access process; and a sending unit that repeatedly sends a physical uplink control channel in the random access process based on the downlink control information.

[0220] Description of symbols

[0221] 10: Wireless communication system

[0222] 20: NG-RAN

[0223] 100: gNB

[0224] 110: Wireless signal transceiver

[0225] 120: Control Department

[0226] 200:UE

[0227] 210: Wireless signal transceiver

[0228] 220: Amplifier

[0229] 230: Modem unit

[0230] 240: Control signal and reference signal processing unit

[0231] 250: Encoding / decoding unit

[0232] 260: Data transceiver

[0233] 270: Control Department

[0234] 1001: Processor

[0235] 1002: Memory

[0236] 1003: Memory

[0237] 1004: Communication device

[0238] 1005: Input device

[0239] 1006: Output device

[0240] 1007: Bus

[0241] 2001: Vehicles

[0242] 2002: Drive Department

[0243] 2003: Steering

[0244] 2004: Accelerator pedal

[0245] 2005: Brake pedal

[0246] 2006: Gear Lever

[0247] 2007: Left and right front wheels

[0248] 2008: Left and right rear wheels

[0249] 2009: Axles

[0250] 2010: Electronic Control Department

[0251] 2012: Information Services Department

[0252] 2013: Communication Module

[0253] 2021: Current Sensors

[0254] 2022: Speed ​​Sensor

[0255] 2023: Barometric pressure sensor

[0256] 2024: Vehicle speed sensor

[0257] 2025: Accelerometers

[0258] 2026: Brake pedal sensor

[0259] 2027: Gearshift sensor

[0260] 2028: Object detection sensors

[0261] 2029: Accelerator pedal sensor

[0262] 2030: Driving Assistance Systems Division

[0263] 2031: Microprocessors

[0264] 2032: Memory (ROM, RAM)

[0265] 2033: Communication port

Claims

1. A terminal comprising: a receiving unit configured to receive a reference signal; and A transmitting unit transmits a request for repeated transmission of a physical uplink control channel in a random access procedure based on a comparison between the received power of the reference signal and a threshold.

2. The terminal according to claim 1, wherein: The threshold is a threshold that serves as a reference for transmitting a request for repeated transmission of a physical uplink shared channel in the random access procedure.

3. The terminal according to claim 1, wherein: The transmitting unit transmits at least one of the repeated transmission request of the physical uplink control channel and the repeated transmission request of the physical uplink shared channel via a physical random access channel.

4. The terminal according to claim 1, wherein: The transmitting unit transmits the repeated transmission request of the physical uplink control channel via a physical uplink shared channel in the random access procedure.

5. A terminal comprising: a receiving unit configured to receive an instruction for repeatedly transmitting a physical uplink shared channel in a random access procedure; and A transmitting unit is configured to repeatedly transmit a physical uplink control channel in the random access procedure based on the instruction.

6. A terminal comprising: a receiving unit that receives downlink control information corresponding to a physical downlink shared channel in a random access procedure; and A transmitting unit is configured to repeatedly transmit a physical uplink control channel in the random access procedure based on the downlink control information.

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