Terminal

Abstract

This terminal is provided with: a transmission unit that performs repeated transmission of a message pertaining to random access using a first resource that applies time division duplexing or a second resource that can use, in a band of the time division duplexing, a sub-band having a transmission / reception direction different from that of the band; and a control unit that determines the second resource as a resource for the repeated transmission.

Description

Terminal

[0001] The present disclosure relates to a terminal that supports subband non-overlapping full duplex (SBFD).

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

[0003] Release 18 discusses a duplexing scheme that enables simultaneous use of downlink (DL) and uplink (UL) by utilizing multiple subbands that make up a time division duplexing (TDD) band. This duplexing scheme is called subband non-overlapping full duplex (SBFD). Symbols to which SBFD is applied may also be called SBFD symbols. In addition, in SBFD symbols, subbands used for DL ​​may also be called DL subbands, and subbands used for UL may also be called UL subbands.

[0004] Furthermore, support for random access (RA) in SBFD is being considered for Release 19 (Non-Patent Document 1). Specifically, it is being considered to extend message transmission and reception on the random access channel (RACH) to SBFD symbols.

[0005] In RA, a terminal (hereinafter also referred to as user equipment (UE)) transmits and receives the following messages to and from a base station (hereinafter also referred to as gNodeB (gNB)). First, the UE transmits a preamble at a valid random access opportunity, and then receives a Random Access Response (RAR). Third, the UE transmits Msg3 as an RRC connection request message. Fourth, the UE 200 receives Msg4 as a contention resolution message. Finally, the UE transmits a Hybrid Automatic Repeat Request (HARQ)-ACK for Msg4.

[0006] “New WID: Evolution of NR duplex operation: Sub-band full duplex (SBFD)”, RP-234035, 3GPP TSG RAN Meeting #102, 3GPP, December 11-15, 2023

[0007] It is desirable to repeatedly transmit various messages transmitted and received in the above-mentioned RA in order to ensure a fast and reliable start of communication. On the other hand, since SBFD symbols perform UL transmission within DL symbols, DL reception within the same symbol may interfere with UL transmission. In this way, SBFD symbols have different properties from non-SBFD symbols in terms of interference.

[0008] Therefore, in scheduling that mixes SBFD symbols and non-SBFD symbols, there is a demand to avoid repeat transmission of messages related to random access due to concerns about the impact of differences in interference on repeat transmission.On the other hand, from the perspective of flexible resource allocation, there is a demand to be able to repeat transmission of messages related to random access even in scheduling that mixes SBFD symbols and non-SBFD symbols.

[0009] Therefore, an object of the present disclosure is to provide a terminal that can repeatedly transmit a message related to random access while taking into consideration the problem of interference in scheduling in which SBFD symbols and non-SBFD symbols are mixed.

[0010] One aspect of the disclosure is a terminal including: a transmitter (radio signal transmitter / receiver 210) that repeatedly transmits a message related to random access using a first resource to which time division duplex is applied, or a second resource that can utilize a subband within the time division duplex band and that has a different transmission and reception direction from the band; and a control unit (controller 270) that determines the second resource as a resource for the repeated transmission.

[0011] One aspect of the disclosure is a terminal including: a transmitter (radio signal transmitter / receiver 210) that repeatedly transmits a message related to random access using a first resource to which time division duplex is applied and a second resource that can utilize a subband within the time division duplex band and that has a different transmission and reception direction from the band; and a controller (controller 270) that determines the first resource and the second resource, which are consecutive in the time direction, as resources for the repeated transmission.

[0012] FIG. 1 is a diagram showing an overall schematic configuration of a wireless communication system. FIG. 2 is a diagram showing frequency ranges used in the wireless communication system. FIG. 3 is a diagram showing example configurations of radio frames, subframes, slots, and symbols used in the wireless communication system. FIG. 4 is a functional block diagram of a terminal. FIG. 5 is a functional block diagram of a base station. FIG. 6 is a diagram showing example SBFD slots / symbols. FIG. 7 is a diagram showing an example of whether Msg3 PUSCH repetitions are possible in SBFD symbols. FIG. 8 is a diagram showing an example of whether Msg3 PUSCH repetitions are possible in SBFD symbols. FIG. 9 is a diagram showing an example of whether Msg3 PUSCH repetitions are possible in SBFD symbols. FIG. 10 is a diagram showing an example of the hardware configuration of a base station and a terminal. FIG. 11 is a diagram showing an example of the configuration of a vehicle.

[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) Configuration of Wireless Communication System The wireless communication system 10 shown in Fig. 1 is a wireless communication system conforming to a method called 5G. Alternatively, the wireless communication system 10 may be a wireless communication system conforming to a method called Beyond 5G, 5G Evolution, or 6G.

[0015] The wireless communication system 10 can support Massive Multiple-Input Multiple-Output (Massive MIMO), which generates more directional beams by controlling wireless signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which uses multiple component carriers (CCs) as a bundle, and Dual Connectivity (DC), which enables simultaneous communication with two base stations.

[0016] As shown in FIG. 1 , the wireless communication system 10 includes a base station 100 (hereinafter also referred to as a gNodeB (gNB) 100) constituting a Next Generation-Radio Access Network (NG-RAN) 20, and a terminal 200 (hereinafter also referred to as a user equipment (UE) 200) that performs wireless communication with the gNB 100. The NG-RAN 20 is connected to a core network (CN) (not shown). The CN is composed of multiple network functions (NFs). The NFs are, for example, an access and mobility management function (AMF) and a network data analytics function (NWDAF). The AMF performs, for example, registration of the UE 200. The NWDAF performs, for example, optimization of the CN. Note that the specific configuration of the wireless communication system 10, for example, the number of gNBs 100 and UEs 200, is not limited to the example shown in FIG. 1 . The NG-RAN 20 and the CN may be simply referred to as a "network."

[0017] The gNB100 may be a base station in a Centralized-Radio Access Network (C-RAN) configuration having a distributed unit (DU) having a function for connecting to the UE200 and a central unit (CU) having a function for connecting to the network. In this case, the gNB100 may be read as a DU, a CU, or a DU and a CU. When the gNB100 is read as a DU, it may be called a gNB-DU. When the gNB100 is read as a CU, it may be called a gNB-CU. When the gNB100 is read as a DU and a CU, the DU portion may be called a gNB-DU and the CU portion may be called a gNB-CU.

[0018] The wireless communication system 10 may also support multiple frequency ranges (FR). That is, as shown in Fig. 2, the wireless communication system 10 may support the following FRs: FR1: 410 MHz to 7.125 GHz FR2-1: 24.25 GHz to 52.6 GHz FR2-2: Over 52.6 GHz to 71 GHz

[0019] In FR1, a subcarrier spacing (SCS) of 15, 30, or 60 kHz and a bandwidth (BW) of 5 to 100 MHz may be used, while in FR2-1, an SCS of 60 or 120 kHz (or even 240 kHz) and a BW of 50 to 400 MHz may be used.

[0020] In FR2-2, 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 may be applied.

[0021] 3, one slot in the wireless communication system 10 is composed of 14 symbols. If this configuration is maintained, the larger (wider) the SCS, the shorter the symbol period (and slot period). Note that the SCS is not limited to the frequencies shown in FIG. 3 and may be, for example, 480 kHz, 960 kHz, or other frequencies.

[0022] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14, but may be, for example, 28 or 56. Furthermore, the number of slots per subframe may differ depending on the SCS.

[0023] (2) Functional Block Configuration of Wireless Communication System (2.1) Functional Block Configuration of Terminal As shown in FIG. 4, the UE 200 includes a wireless signal transmitting / receiving unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, an encoding / decoding unit 250, a data transmitting / receiving unit 260, and a control unit 270.

[0024] The radio signal transceiver 210 transmits and receives radio signals to and from the gNB 100. The radio signal transceiver 210 may be configured with a transmitter that transmits radio signals to the gNB 100 and a receiver that receives radio signals from the gNB 100. The radio signals may include data or may be interpreted as data. Transmission may be interpreted as report, notification, etc. Reception may be interpreted as (configured), (instructed), (notified), etc. Note that configuration may be realized by configuration information (information element (IE)) of the radio resource control (RRC) layer, and instruction may be realized by a control element (CE) or downlink control information (DCI) of the medium access control (MAC) layer.

[0025] The radio signal transmitting / receiving unit 210 of the embodiment can execute random access (RA) with respect to the gNB 100. Specifically, the radio signal transmitting / receiving unit 210 can transmit and receive various messages related to random access with respect to the gNB 100. The transmission and reception of various messages in RA will be briefly described below.

[0026] First, the radio signal transceiver 210 transmits a preamble (Msg1) at a valid random access opportunity determined based on the previous RACH configuration, and second, the radio signal transceiver 210 receives Msg2 as a Random Access Response (RAR).

[0027] Third, the radio signal transmitting / receiving unit 210 transmits Msg3 as an RRC connection request message. Note that Msg3 may be referred to as Msg3 PUSCH because it is transmitted via a physical uplink shared channel (PUSCH). Fourth, the radio signal transmitting / receiving unit 210 receives Msg4 as a contention resolution message.

[0028] Finally, the radio signal transceiver 210 transmits a Hybrid Automatic Repeat Request (HARQ)-ACK for Msg4. The HARQ-ACK for Msg4 is transmitted via a Physical Uplink Control Channel (PUCCH), and may therefore be referred to as an Msg4 HARQ-ACK PUCCH or an Msg4 PUCCH. The transmission of the Msg4 PUCCH completes random access.

[0029] The radio signal transmitting and receiving unit 210 of the embodiment can repeatedly transmit the above-described random access-related message. That is, the radio signal transmitting and receiving unit 210 can repeatedly transmit a preamble, an Msg3 PUSCH, and an Msg4 HARQ-ACK PUCCH (Msg4 PUCCH) as messages related to random access. Note that the Msg3 PUSCH may be replaced with a physical uplink shared channel related to random access. Also, the Msg4 HARQ-ACK PUCCH (Msg4 PUCCH) may be replaced with a physical uplink control channel related to random access.

[0030] The radio signal transceiver 210 of the embodiment can repeatedly transmit a message related to random access using resources (non-SBFD slots / symbols) to which time division duplexing (TDD) is applied. The radio signal transceiver 210 can also repeatedly transmit a message related to random access using resources (SBFD slots / symbols) that are available as subbands within the TDD band and have different transmission and reception directions. In this case, the radio signal transceiver 210 can repeatedly transmit a message related to random access in an UL subband within the SBFD slots / symbols. In this specification, non-SBFD slots / symbols may be referred to as first resources, and SBFD slots / symbols may be referred to as second resources.

[0031] The radio signal transmitting / receiving unit 210 of the embodiment can use only one of the first resource or the second resource, or can use both, when repeatedly transmitting a message related to random access. Furthermore, when using only one of the first resource or the second resource, as shown in Figures 7 and 8, the radio signal transmitting / receiving unit 210 can perform repeated transmission using the second resource that spans the first resource in the time direction, or can perform repeated transmission using the first resource that spans the second resource in the time direction. The control unit 270, which will be described later, determines which resource is actually used when repeatedly transmitting a message related to random access.

[0032] The radio signal transmitting and receiving unit 210 according to the embodiment may transmit, via a preamble transmitted in random access, information indicating whether or not repeat transmission is possible in the second resource. The information indicating whether or not repeat transmission is possible may be transmitted as a UE capability or as a request for repeat transmission to the gNB 100.

[0033] The amplifier unit 220 is configured by a power amplifier (PA) / low noise amplifier (LNA), etc. The amplifier unit 220 amplifies the radio signal output from the radio signal transmitting / receiving unit 210. The amplifier unit 220 also amplifies the radio signal output from the modulation / demodulation unit 230.

[0034] The modem unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB100 or another gNB100). CP-OFDM / DFT-S-OFDM may be applied to the modem unit 230. Furthermore, DFT-S-OFDM may be used not only for the uplink (UL) but also for the downlink (DL).

[0035] The control signal / reference signal processing unit 240 performs processing related to control signals transmitted and received between the gNB 100, such as radio resource control (RRC) signaling.

[0036] The control signal / reference signal processing unit 240 performs processing related to reference signals transmitted and received between the gNB 100, such as Demodulation Reference Signal (DMRS), Phase Tracking Reference Signal (PTRS), Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS).

[0037] The channels include control channels and data channels. The control channels include a physical uplink control channel (PUCCH), a physical downlink control channel (PDCCH), a physical random access channel (PRACH), a physical broadcast channel (PBCH), etc. The data channels include a physical uplink shared channel (PUSCH), a physical downlink shared channel (PDSCH), etc.

[0038] The encoding / decoding unit 250 performs division / concatenation and coding / decoding of data contained in the radio signal for each predetermined communication destination (gNB100 or another gNB100).

[0039] Specifically, the encoding / decoding unit 250 decodes the data output from the modem unit 230 and concatenates the decoded data. In addition, the encoding / decoding unit 250 divides the data output from the data transmitter / receiver 260 into pieces of a predetermined size and performs coding on the divided data.

[0040] The data transmitter / receiver 260 assembles and disassembles data units (Protocol Data Units (PDUs) / Service Data Units (SDUs)) that make up data between each layer. The multiple layers include a Medium Access Control (MAC) layer, a Radio Link Control (RLC) layer, and a Packet Data Convergence Protocol (PDCP) layer. The data transmitter / receiver 260 also performs data error correction and retransmission control based on Hybrid Automatic Repeat Request (HARQ).

[0041] The control unit 270 controls the UE 200. The control unit 270 controls, for example, transmission and reception of radio signals by the radio signal transmission and reception unit 210, amplification by the amplifier unit 220, data modulation / demodulation by the modem unit 230, signal processing by the control signal and reference signal processing unit 240, coding / decoding by the encoding / decoding unit 250, and assembly / disassembly of data units by the data transmission and reception unit 260.

[0042] The control unit 270 of the embodiment can determine resources for repeated transmission. For example, the control unit 270 can determine the above-mentioned second resource as the resource for repeated transmission. Note that even if the second resource overlaps the first resource in the time direction as shown in FIG. 8, the control unit 270 can determine such second resource as the resource for repeated transmission. Furthermore, the control unit 270 can determine the first resource and the second resource that are consecutive in the time direction as the resource for repeated transmission as shown in FIG. 9.

[0043] (2.2) Functional block configuration of base station As shown in Figure 5, the gNB100 includes a radio signal transceiver unit 110 and a control unit 120.

[0044] The radio signal transmitting / receiving unit 110 transmits and receives radio signals to and from the UE 200. The radio signal transmitting / receiving unit 110 may be configured with a transmitting unit that transmits radio signals to the UE 200 and a receiving unit that receives radio signals from the UE 200. The radio signals may include data or may be interpreted as data. Transmission may be interpreted as configuration, instruction, notification, etc. Reception may be interpreted as (reported), notification, etc. Note that configuration may be realized by configuration information (information element (IE)) of a radio resource control (RRC) layer, and instruction may be realized by a control element (CE) or downlink control information (DCI) of a medium access control (MAC) layer.

[0045] The radio signal transmitting and receiving unit 110 according to the embodiment can transmit (set) a RACH configuration to the UE 200 .

[0046] The control unit 120 controls the gNB 100. The control unit 120 controls, for example, the transmission and reception of radio signals by the radio signal transmission and reception unit 110. The control unit 120 also performs scheduling for the UE 200.

[0047] The control unit 120 can control handover (HO) of the UE 200. HO may be understood as, for example, transition of the UE 200 from the gNB 100 to which it is connected to another gNB 100. Note that the gNB 100 to which the UE 200 is connected in HO may be interpreted as a cell or beam formed by the gNB 100. HO may also be interpreted as a term such as cell transition, cell change, or beam change.

[0048] (3) SBFD As shown in Fig. 6, SBFD may be applied to each slot / symbol. Note that, in addition to DL and UL, each slot / symbol may be set to Flexible (FL) that can be used as DL or UL, and then SBFD may be applied.

[0049] SBFD is a type of (full-duplex) duplexing scheme based on time division duplexing (TDD), enabling simultaneous use of multiple sub-bands that make up the TDD band. SBFD can be described as a duplexing scheme in which multiple sub-bands are specified within the TDD band, a duplexing scheme in which UL and DL are allocated non-overlapping in the frequency direction within the TDD time unit, or full-duplex duplexing of sub-bands.

[0050] A slot / symbol to which SBFD is applied is also referred to as an SBFD slot / symbol. "SBFD is applied" may be interpreted as SBFD being applied to at least a part of scheduling. In other words, "slot / symbol to which SBFD is applied" may be interpreted as a slot / symbol to which SBFD is applied in scheduling to which SBFD is applied (SBFD slot / symbol). Also, "time unit to which non-SBFD is applied" may be interpreted as a slot / symbol to which SBFD is not applied in scheduling to which SBFD is applied (non-SBFD slot / symbol).

[0051] As shown in Figure 6, each subband (SBFD subband) constituting an SBFD slot / symbol is assigned DL or UL. Hereinafter, a subband assigned DL is also referred to as a DL subband, and a subband assigned UL is also referred to as a UL subband. In Figure 6, slots / symbols or subbands marked with "D" are DL slots / symbols or DL ​​subbands, and slots / symbols or subbands marked with "U" are UL slots / symbols or UL subbands. Note that slots / symbols marked with "F" in other figures are FL slots / symbols.

[0052] The following provides a brief explanation of the terms related to SBFD. SBFD DL symbol: A symbol specified for DL ​​by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, and for which the SBFD subband is set. SBFD FL symbol: A symbol specified for FL by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, and for which the SBFD subband is set. SBFD SSB symbol: A symbol specified for SSB reception, and for which the SBFD subband is set. Non-SBFD symbol: A symbol for which the SBFD subband is not set.

[0053] The non-SBFD slot / symbol and the SBFD slot / symbol may be interpreted as time units. For example, the non-SBFD slot / symbol may be interpreted as a time unit to which TDD is applied, and the SBFD slot / symbol may be interpreted as a time unit in which multiple subbands constituting the TDD band (or subbands within the TDD band that have different transmission and reception directions from the TDD band) can be used.

[0054] The non-SBFD slots / symbols and the SBFD slots / symbols may be interpreted as resources viewed in the time direction. For example, the non-SBFD slots / symbols may be interpreted as resources to which TDD is applied, and the SBFD slots / symbols may be interpreted as resources available in multiple subbands constituting the TDD band (or subbands within the TDD band that have different transmission and reception directions from the TDD band).

[0055] (4) Operation of wireless communication system (4.1) Issues In scheduling in which SBFD symbols and non-SBFD symbols are mixed, there is a demand to avoid repeat transmission of messages related to random access due to concerns about the impact of differences in interference on repeat transmission. On the other hand, from the perspective of flexible resource allocation, there is a demand to be able to repeat transmission of messages related to random access even in scheduling in which SBFD symbols and non-SBFD symbols are mixed.

[0056] (4.2) Operational Examples (4.2.1) Operational Example 1 Operational example 1 will be described with reference to Figures 7 to 9. In operation example 1, UE 200 determines whether or not to support repeated transmission of Msg3 PUSCH in SBFD symbols. Note that in Figures 7 to 9, the boundary between the UL symbol and the DL symbol is assumed to be the boundary of the slot.

[0057] It is assumed that UE 200 supports Msg3 PUSCH without repeated transmission in SBFD symbols (overlapping with SBFD symbols). Note that the SBFD symbols in operation example 1 are, for example, SBFD DL symbols, SBFD FL symbols, and / or SBFD SSB symbols.

[0058] In the following, the case where repeated transmission of Msg3 PUSCH in the SBFD symbol is not supported will be described as Option A, and the case where it is supported will be described as Option B. However, which of Option A or B is adopted may be predefined by the standard, or may be set or instructed by gNB100.

[0059] (4.2.1.1) Option A In Option A, UE 200 does not support repeated transmission of Msg3 PUSCH in the SBFD symbol (overlapping the SBFD symbol). When Option A is adopted, repeated transmission of Msg3 PUSCH is performed as shown in FIG. 7.

[0060] First, as Case 1, when the SBFD symbol of Option A does not include the SBFD FL symbol, the legacy rule may be reused, i.e., repeated transmission of the Msg3 PUSCH may be performed in the UL symbol and the FL symbol.

[0061] Next, for Case 2, if the SBFD symbols of Option A include an SBFD FL symbol, the determination of the repetition slot for the Msg3 PUSCH needs to be changed because repeated transmission of the Msg3 PUSCH is allowed in the UL symbol and the FL symbol, but not in the SBFD FL symbol in this case.

[0062] In case 2, for an Msg3 PUSCH having a repetition factor greater than 1, if the repeated transmission of the PUSCH does not overlap any DL / SSB symbol or SBFD symbol, UE 200 determines the repeat slot (N slots) for the Msg3 PUSCH as the repeat slot (N slots) for the first Msg3 PUSCH.

[0063] (4.2.1.2) Option B In Option B, UE 200 supports repeated transmission of Msg3 PUSCH in (overlapping with) the SBFD symbol. Note that the following description applies to Msg3 PUSCH with a repetition factor greater than 1.

[0064] (4.2.1.2.1) Option B-1 In Option B-1, repeated transmission of the Msg3 PUSCH is possible in SBFD symbols and non-SBFD symbols in one slot / different slots. When Option B-1 is adopted, repeated transmission of the Msg3 PUSCH is performed as shown in FIG. 9. As a variation, the Msg3 PUSCH in one slot may be restricted only to SBFD symbols or only to non-SBFD symbols. In other words, repeated transmission of the Msg3 PUSCH in one slot is not expected / allowed to overlap both SBFD symbols and non-SBFD symbols.

[0065] In option B-1, if the repeated transmission of the Msg3 PUSCH does not overlap any non-SBFD DL symbol or (non-SBFD) SSB symbol (and does not overlap both an SBFD symbol and a non-SBFD symbol simultaneously (and does not overlap an RB outside the UL subband of the SBFD symbol when the Msg3 PUSCH in the slot overlaps an SBFD symbol)), UE 200 determines the repeated slot (N slots) for the Msg3 PUSCH as the first repeated slot (N slots) for the Msg3 PUSCH starting from slot n+k2+Δ.

[0066] (4.2.1.2.2) Option B-2 In Option B-2, repeated transmission of multiple Msg3 PUSCHs in multiple slots may be limited to only SBFD symbols or to only non-SBFD symbols. When Option B-2 is adopted, repeated transmission of Msg3 PUSCHs is performed as shown in Figure 7 or Figure 8.

[0067] Example 1: UE 200 determines the symbol type (eg, SBFD symbol type, non-SBFD symbol type) based on the first slot determined for repeated transmission of Msg3 PUSCH.

[0068] Determining the first slot: If the repeated transmission of the Msg3 PUSCH does not overlap any non-SBFD DL symbol or (non-SBFD) SSB symbol (and does not overlap both an SBFD symbol and a non-SBFD symbol at the same time (and does not overlap with an RB outside the UL subband of the SBFD symbol when the Msg3 PUSCH in that slot overlaps with the SBFD symbol)), the slot for the first repeated transmission of the Msg3 PUSCH is the repeated slot (N slots) for the first Msg3 PUSCH starting from slot n+k2+Δ.

[0069] If the Msg3 PUSCH symbol of the first slot is an SBFD symbol, the UE 200 determines the repeat slot (N slots) for the Msg3 PUSCH as the first repeat slot (N slots) for the Msg3 PUSCH in which the repeated transmission of the PUSCH is within the SBFD symbol.

[0070] If the Msg3 PUSCH symbol in the first slot is a non-SBFD symbol, UE 200 determines the repeating slot (N slots) for the Msg3 PUSCH as the first repeating slot (N slots) for the Msg3 PUSCH in which the repeated transmission of the PUSCH does not overlap with any DL / SSB symbol or SBFD symbol.

[0071] Example 2: UE200 determines the symbol type (e.g., SBFD symbol type, non-SBFD symbol type) based on the RAR instruction or gNB configuration / instruction.

[0072] If the symbol type indicated or set is the SBFD symbol type, UE 200 determines the repeat slot (N slots) for Msg3 PUSCH as the first repeat slot (N slots) for Msg3 PUSCH in which the repeated transmission of PUSCH is within the SBFD symbol.

[0073] If the symbol type indicated or configured is a non-SBFD symbol type, UE200 determines the repeat slot (N slots) for Msg3 PUSCH as the first repeat slot (N slots) for Msg3 PUSCH in which the repeated transmission of PUSCH does not overlap any DL / SSB symbol or SBFD symbol.

[0074] Example 3: UE 200 determines the recurring slots (N slots) for Msg3 PUSCH and expects the PUSCH symbols in each slot to be all SBFD symbols or all non-SBFD symbols.

[0075] If the repeated transmission of the Msg3 PUSCH does not overlap any non-SBFD DL symbol or (non-SBFD) SSB symbol (and does not overlap both an SBFD symbol and a non-SBFD symbol at the same time (and does not overlap with an RB outside the UL subband of the SBFD symbol when the Msg3 PUSCH in the slot overlaps with the SBFD symbol)), UE 200 determines the repeated transmission slot of the Msg3 PUSCH as the first repeated slot (N slots) for the Msg3 PUSCH starting from slot n+k2+Δ.

[0076] (4.2.2) Operation Example 2 Operation example 2 is an example in which power control related to transmission of Msg3 PUSCH is performed separately for SBFD symbols and non-SBFD symbols in operation example 1.

[0077] Alt-1: The delta preamble power parameter for the Msg3 PUSCH in the SBFD symbol and the delta preamble power parameter for the Msg3 PUSCH in the non-SBFD symbol are set separately. For example, separate delta preamble power parameters are set for calculating PREAMBLE_RECEIVED_TARGET_POWER.

[0078] Example: In PUSCH-configCommon, a new parameter msg3-DeltaPreamble-sbfd-r19 is configured, where msg3-DeltaPreamble is used for Msg3 PUSCH transmissions in non-SBFD symbols, and the new parameter msg3-DeltaPreamble-sbfd-r19 is used for Msg3 PUSCH transmissions in SBFD symbols.

[0079] Example: A common PUSCH configuration is configured separately for SBFD and non-SBFD. For example, a new parameter, PUSCH-configCommon-sbfd-r19, is configured for SBFD. In this case, the msg3-DeltaPreamble in PUSCH-configCommon for non-SBFD is used for Msg3 PUSCH transmission in non-SBFD symbols, and the msg3-DeltaPreamble (or msg3-DeltaPreamble-sbfd-r19) in PUSCH-configCommon-sbfd-r19 for SBFD is used for Msg3 PUSCH transmission in SBFD symbols.

[0080] Alt-2: A (target) power offset may be configured or indicated for Msg3 PUSCH transmission in SBFD symbols.

[0081] For example, for Msg3 PUSCH transmission in an SBFD symbol, the following formula may be applied. Note that SBFD_offset in the formula may be set or indicated by the gNB 100, and the value (dB) of SBFD_offset may be positive (e.g., +1 / 2 / 3 dB) or negative (e.g., −1 / 2 / 3 dB). P O_NOMINAL_PUSCH,f,c (0) = P O_PRE + Δ PREAMBLE,Msg3 + SBFD_offset

[0082] (4.2.3) Operation Example 3 Operation example 3 will be described. In operation example 3, UE 200 determines whether to support repeated transmission of a HARQ-ACK PUCCH for Msg4 (also referred to in this specification as Msg4 HARQ-ACK PUCCH or Msg4 PUCCH) in an SBFD symbol. Note that in this specification, Msg4 PUCCH may be interpreted as the HARQ-ACK PUCCH before dedicated PUCCH resource configuration.

[0083] This is premised on the premise that UE 200 supports Msg4 PUCCH without repeat transmission in SBFD symbols (overlapping with SBFD symbols). Note that the SBFD symbols in operation example 3 are, for example, SBFD DL symbols, and / or SBFD FL symbols, and / or SBFD SSB symbols. Note that UE 200 does not have to support Msg4 PUCCH without repeat transmission in SBFD symbols (overlapping with SBFD symbols).

[0084] In the following, the case where repeated transmission of Msg4 PUCCH in SBFD symbols is not supported will be described as Option A, and the case where it is supported will be described as Option B. However, which of Option A or B is adopted may be predefined by the standard, or may be set or instructed by gNB100.

[0085] (4.2.3.1) Option A In Option A, the UE 200 does not support repeated transmission of Msg4 PUCCH in the SBFD symbol (overlapping the SBFD symbol).

[0086] First, as Case 1, if the SBFD symbol of Option A does not include an SBFD FL symbol, the legacy rule may be reused, i.e., repeated transmission of Msg4 PUCCH may be performed in the UL symbol and the FL symbol.

[0087] Next, for Case 2, if the SBFD symbols of Option A include an SBFD FL symbol, the determination of the repetition slot for Msg4 PUCCH needs to be changed because repeated transmission of Msg4 PUCCH is allowed in the UL and FL symbols, but not in the SBFD FL symbol in this case.

[0088] In case 2, for an Msg4 PUCCH with a repetition factor greater than 1, if the repeated transmission of the PUCCH is within a UL symbol or a non-SBFD FL symbol that is not configured for SSB (or if the repeated transmission of the PUCCH does not overlap with any SBFD symbol or non-SBFD DL / SSB symbol), UE 200 determines the repeated slot (N slots) for the Msg4 PUCCH as the repeated slot (N slots) for the first Msg4 PUCCH.

[0089] (4.2.3.2) Option B In Option B, UE 200 supports repeated transmission of Msg4 PUCCH in (overlapping with) the SBFD symbol. Note that the following description applies when a repetition factor greater than 1 is indicated by DCI format 1_0 with CRC scrambled by TC-RNTI that schedules Msg4 (Msg4 PDSCH).

[0090] (4.2.3.2.1) Option B-1 In Option B-1, repeated transmission of multiple Msg4 PUCCHs in multiple slots is possible in SBFD symbols (non-SBFD symbols) in different slots.

[0091] In option B-1, UE 200 determines the first Msg4 PUCCH repetition slot (N slots) starting from the indicated or configured PUCCH reporting slot. The first Msg4 PUCCH repetition slot has at least one of the following: ・UL symbol, FL symbol that is not a (non-SBFD) SSB symbol, and SBFD DL (or SSB) symbol as the first symbol ・Contiguous UL symbols, consecutive FL symbols that are not (non-SBFD) SSB symbols, and consecutive SBFD DL (or SSB) symbols starting from the first symbol for at least the number of symbols given by nrofsymbols ・(Furthermore, when a PUCCH in a slot overlaps an SBFD symbol, PUCCH RBs do not overlap RBs outside the UL subband within the SBFD symbol.) ・(Furthermore, a PUCCH does not overlap both an SBFD symbol and a non-SBFD symbol simultaneously.)

[0092] (4.2.3.2.2) Option B-2 In Option B-2, repeated transmission of multiple Msg4 PUCCHs in multiple slots may be limited to only SBFD symbols or to only non-SBFD symbols.

[0093] Example 1: UE 200 determines the symbol type (eg, SBFD symbol type, non-SBFD symbol type) based on the first slot determined for repeated transmission of Msg4 PUCCH.

[0094] The UE 200 determines the first slot of the repeat slots (N slots) for the Msg4 PUCCH, similarly to the condition of Option B-2 in the first operational example.

[0095] If the Msg4 PUCCH symbol in the first slot is an SBFD symbol, the UE 200 determines the repeat slot (N slots) for the Msg4 PUCCH as the first repeat slot (N slots) for the Msg4 PUCCH in which the repeated transmission of the PUSCH is within the SBFD symbol.

[0096] - If the Msg4 PUCCH symbol in the first slot is a non-SBFD symbol, UE200 determines the repeat slot (N slots) for the Msg4 PUCCH as the repeat slot (N slots) for the first Msg4 PUCCH if the repeat transmission of the PUCCH is within a UL symbol or a non-SBFD FL symbol that is not configured for SSB (or if the repeat transmission of the PUCCH does not overlap with any SBFD symbol or non-SBFD DL / SSB symbol).

[0097] Example 2: UE 200 schedules Msg4 (Msg4 PDSCH) and determines the symbol type (e.g., SBFD symbol type, non-SBFD symbol type) based on an indication by DCI format 1_0 with CRC scrambled by TC-RNTI or based on configuration.

[0098] - If the symbol type indicated or set is the SBFD symbol type, UE200 determines the repeat slot (N slots) for Msg4 PUCCH as the first repeat slot (N slots) for Msg4 PUCCH in which the repeated transmission of PUCCH is within the SBFD symbol.

[0099] - If the symbol type indicated or set is a non-SBFD symbol type, UE200 determines the repeat slot (N slots) for Msg4 PUCCH as the first repeat slot (N slots) for Msg4 PUCCH in which the repeated transmission of PUCCH does not overlap with any DL / SSB symbol or SBFD symbol.

[0100] Example 3: UE 200 determines the repeating slots (N slots) for Msg4 PUCCH, similar to the conditions of Option B-2 in Operation Example 1, and expects that the PUCCH symbols in each slot are all SBFD symbols or all non-SBFD symbols.

[0101] (4.2.4) Operation Example 4 In the above-described Operation Examples 1 to 3, the following content may be applied.

[0102] (4.2.4.1) Possibility / request of Msg3 PUSCH in SBFD symbol UE 200 may report / indicate (should report / indicate) whether it is possible to recognize the time / frequency position of the SBFD subband via PRACH transmission. UE 200 may also report / indicate (should report / indicate) whether it is possible / request of Msg3 PUSCH transmission in the SBFD symbol via PRACH transmission.

[0103] As a variation of the latter, UE 200 may report whether or not it is possible to recognize the time / frequency location of the SBFD subband, thereby implicitly reporting whether or not it is possible to / request for Msg3 PUSCH transmission within the SBFD symbol. For example, when UE 200 reports whether or not it is possible to recognize the time / frequency location of the SBFD subband, this may imply / indicate whether or not it is possible to / request for Msg3 PUSCH transmission within the SBFD symbol.

[0104] (4.2.4.2) Possibility / Request of Msg4 HARQ-ACK PUCCH in SBFD Symbol UE 200 may report / indicate (should report / indicate) whether it is possible to recognize the time / frequency location of the SBFD subband via PRACH transmission or Msg3 PUSCH transmission. UE 200 may also report / indicate (should report / indicate) whether it is possible / request of Msg4 HARQ-ACK PUCCH transmission in SBFD symbol via PRACH transmission or Msg3 PUSCH transmission.

[0105] As a variation of the latter, UE 200 may report whether or not it recognizes the time / frequency location of the SBFD subband, thereby implicitly reporting whether or not it recognizes / requests the Msg4 HARQ-ACK PUCCH transmission within the SBFD symbol. For example, when UE 200 reports whether or not it recognizes the time / frequency location of the SBFD subband, this may imply / indicate whether or not it recognizes / requests the Msg4 HARQ-ACK PUCCH transmission within the SBFD symbol.

[0106] As another variation, UE 200 may report whether or not / request for Msg4 HARQ-ACK PUCCH transmission in the SBFD symbol is possible by reporting whether or not / request for Msg3 PUSCH transmission in the SBFD symbol is possible. For example, when UE 200 reports whether or not / request for Msg3 PUSCH transmission in the SBFD symbol is possible, this may imply / indicate whether or not / request for Msg4 HARQ-ACK PUCCH transmission in the SBFD symbol is possible.

[0107] (4.2.4.3) Reporting / instruction of possibility / request regarding SBFD symbols via PRACH transmission When UE 200 reports / instructs, via PRACH transmission, whether or not it recognizes the time / frequency position of the SBFD subband, and / or whether or not it recognizes / requests Msg3 PUSCH transmission within the SBFD symbol, and / or whether or not it recognizes / requests Msg4 HARQ-ACK PUCCH transmission within the SBFD symbol, it can report the possibility / request using a PRACH resource different from that of UEs that do not support / instruct the possibility / request.

[0108] Example 1: A separate preamble resource or PRACH resource may be configured based on a feature combination. In this case, the feature combination may indicate / configure / introduce / define whether or not to recognize the time / frequency location of the SBFD subband, and / or whether or not to enable / require Msg3 PUSCH transmission within the SBFD symbol, and / or whether or not to enable / require Msg4 HARQ-ACK PUCCH transmission within the SBFD symbol. For example, an additional RACH configuration may be configured for the feature combination, thereby configuring a separate RO resource. Also, a separate preamble resource may be configured for the feature combination.

[0109] Example 2: An additional RACH may be configured for SBFD. In this case, the UE 200 implicitly indicates whether or not the configuration is possible / required by using an RO in the RACH configuration for SBFD. Note that the rule for determining a valid RO applied to the additional RACH configuration may be a legacy rule or an extended rule. The legacy rule and the extended rule will be described below.

[0110] The legacy rule for determining a valid RO is that an RO in an UL symbol (UL sub-band) or an FL symbol (not configured for SSB) as seen from the UE is considered a valid RO, and an RO in a DL symbol (DL sub-band) or an FL symbol (configured for SSB) as seen from the UE is considered an invalid RO.

[0111] The extended rule for determining a valid RO may be configured by the conditions for determining a valid RO shown below. Note that the extended rule for determining a valid RO is a rule for a cell in which SBFD operation is configured on the gNB side. Note that Cond-X in the figure corresponds to condition X.

[0112] Condition 1: Each symbol is a UL symbol. Condition 2: Each symbol is an FL symbol not configured for SSB. Condition 3: Each symbol is a UL symbol or an FL symbol not configured for SSB (non-SBFD). Condition 4: Each symbol is an SBFD symbol (e.g., an SBFD DL symbol, and / or an SBFD FL symbol, and / or an SBFD SSB symbol). Condition 5: Each symbol is an SBFD symbol (e.g., an SBFD DL symbol, and / or an SBFD FL symbol, and / or an SBFD SSB symbol) or a UL symbol (or an FL symbol not configured for SSB, or an FL symbol not configured for SSB (non-SBFD)).

[0113] Condition 6: At least N_gap symbols must be spaced after the last (non-SBFD) DL symbol, and / or at least N_gap symbols must be spaced after the last (non-SBFD) SSB symbol, and / or must not precede an SSB symbol in the same PRACH slot (a non-SBFD symbol). Condition 7: Must not overlap with both a non-SBFD symbol (e.g., a UL symbol or a non-SBFD FL symbol) and an SBFD symbol (e.g., an SBFD DL symbol, and / or an SBFD FL symbol, and / or an SBFD SSB symbol). Condition 8: Must not overlap with a non-SBFD DL symbol or a (non-SBFD) SSB symbol. Condition 9: Must not overlap with RBs outside the UL subband in an SBFD symbol (e.g., an SBFD DL symbol, and / or an SBFD FL symbol, and / or an SBFD SSB symbol).

[0114] That is, valid ROs in the extended rules for determining valid ROs may include ROs that satisfy one or more combinations of these conditions. One or more combinations of the above conditions may be predefined in the standard or may be set by the gNB. For example, valid ROs may include the following ROs:

[0115] ・Example 1: An RO that satisfies condition 1 (determined as a valid RO even under the legacy rules) ・Example 2: An RO that satisfies conditions 2 / 3 and 6 Example 2-1: If the parenthesized statement regarding non-SBFD in condition 6 does not apply, the RO will be determined as a valid RO even under the legacy rules Example 2-2: If the parenthesized statement regarding non-SBFD in condition 6 applies, the RO may be determined as an invalid RO under the legacy rules. This is because the conditions for determining a valid RO in this case are more relaxed. ・Example 3: An RO that satisfies conditions 2 / 3 and 9 (and condition 6) ・Example 4: An RO that satisfies condition 4 (and condition 6) ・Example 5: An RO that satisfies conditions 4 and 9 (and condition 6) ・Example 6: An RO that satisfies condition 5 (and condition 6) ・Example 7: An RO that satisfies condition 5 and condition 9 (and condition 6) ・Example 8: An RO that satisfies condition 7 (and at least one of conditions 6 / 8) ・Example 9: An RO that satisfies conditions 7 and 9 (and at least one of conditions 6 / 8)

[0116] Example 3: The UE 200 implicitly indicates whether or not a request is possible by using an RO that has been determined as an invalid RO by the above-described legacy rule and then determined as a valid RO by the extended rule.

[0117] (4.2.4.4) Reporting / Instruction of Possibility / Request of SBFD Symbol via Msg3 PUSCH Transmission When UE 200 reports / instructs via Msg3 PUSCH transmission whether or not it recognizes the time / frequency location of the SBFD subband and / or whether or not it recognizes / requests Msg4 HARQ-ACK PUCCH transmission in the SBFD symbol, it can report (may report) the possibility / request by higher layer signaling (e.g., MAC CE) in the Msg3 PUSCH. Furthermore, when UE 200 reports / instructs via Msg3 PUSCH transmission whether or not it recognizes the time / frequency location of the SBFD subband and / or whether or not it recognizes / requests Msg4 HARQ-ACK PUCCH transmission in the SBFD symbol, it can report (may report) the possibility / request by higher layer signaling (e.g., DMRS ports, and / or TDRA, and / or FDRA) in the Msg3 PUSCH.

[0118] Example: Different DMRS ports may be predefined or indicated for a UE 200 indicating / reporting a capability / request than for a UE that does not support / indicate a capability / request. Example: A different TDRA interpretation may be used for a UE 200 indicating / reporting a capability / request. For example, a UE 200 indicating / reporting a capability / request may determine a slot for Msg3 PUSCH transmission when the Msg3 PUSCH symbol is an SBFD symbol. Example: A different FDRA interpretation may be used for a UE 200 indicating / reporting a capability / request. For example, a UE 200 indicating / reporting a capability / request may determine frequency domain resource allocation only within the UL subband of the SBFD symbol.

[0119] (4.2.4.5) Variations supporting features in the standard PRACH transmission in SBFD symbols (e.g., SBFD DL symbols, and / or SBFD FL symbols, and / or SBFD SSB symbols, the same applies below) and / or Msg3 PUSCH transmission in SBFD symbols and / or Msg4 HARQ-ACK PUCCH transmission in SBFD symbols may be supported in the standard. PRACH transmission in SBFD symbols may not be supported in the standard, and Msg3 PUSCH transmission in SBFD symbols and / or Msg4 HARQ-ACK PUCCH transmission in SBFD symbols may be supported in the standard. PRACH transmission in SBFD symbols and / or Msg3 PUSCH transmission in SBFD symbols may not be supported in the standard, and Msg4 HARQ-ACK PUCCH transmission in SSBFD symbols may be supported in the standard.

[0120] (4.2.4.6) Variations of UE capability ・UE 200 may not support / report whether PRACH transmission in the SBFD symbol is possible, but may support / report whether Msg3 PUSCH transmission in the SBFD symbol is possible / requested and / or whether Msg4 HARQ-ACK PUCCH transmission in the SBFD symbol is possible / requested. ・UE 200 may not support / report whether Msg3 PUSCH transmission in the SBFD symbol is possible / requested, but may report / indicate whether Mg4 HARQ-ACK PUCCH transmission in the SBFD symbol is possible / requested. ・UE 200 may not support / report whether Mg4 HARQ-ACK PUCCH transmission in the SBFD symbol is possible / requested, but may report / indicate whether Mg3 PUSCH transmission in the SBFD symbol is possible / requested. Whether PRACH transmission within the SBFD symbol is possible may be a necessary condition for UE 200 to report whether Msg3 PUSCH transmission within the SBFD symbol is possible / not possible / requested and / or whether Msg4 HARQ-ACK PUCCH transmission within the SBFD symbol is possible / not possible / requested. Whether Msg3 PUSCH transmission within the SBFD symbol is possible / not possible / requested may be a necessary condition for UE 200 to report whether Msg4 HARQ-ACK PUCCH transmission within the SBFD symbol is possible / not possible / requested.

[0121] (5) Actions and Effects According to the above-described embodiment, UE 200 can repeatedly transmit messages related to random access while taking into consideration the problem of interference in scheduling in which SBFD symbols and non-SBFD symbols are mixed.

[0122] In particular, by using only the second resource (SBFD slots / symbols) as the resource for repeatedly transmitting a message related to random access, it is possible to reliably transmit the message related to random access regardless of the difference in the amount of interference with the first resource (non-SBFD slots / symbols). Also, by using the first resource and the second resource, which are consecutive in the time direction, as the resources for repeatedly transmitting a message related to random access, it is possible to quickly transmit the message related to random access, although there will be a difference in the amount of interference with the first resource.

[0123] (6) Other Embodiments The contents of the present invention have been described above in accordance with the embodiments, but it will be obvious to those skilled in the art that the present invention is not limited to these descriptions and that various modifications and improvements are possible.

[0124] The above-described operation examples may be combined and applied in a composite manner, as long as no contradiction occurs.

[0125] The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of hardware and / or software. Furthermore, 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 directly or indirectly connected (e.g., wired, wireless, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or multiple devices.

[0126] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, 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 these functions are implemented.

[0127] For example, the base station 100, the terminal 200, and the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 10 is a diagram illustrating an example of the hardware configuration of the base station 100 and the terminal 200 according to an embodiment of the present disclosure. The base station 100 and the terminal 200 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0128] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of base station 100 and terminal 200 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.

[0129] Each function in the base station 100 and the terminal 200 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0130] 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 device, an arithmetic unit, a register, etc.

[0131] 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-described embodiments. While the above-described various processes have been described as being executed by one processor 1001, they 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.

[0132] 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 executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.

[0133] 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 storage medium may be, for example, a database, a server, or other suitable medium including at least one of memory 1002 and storage 1003.

[0134] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. 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).

[0135] The input device 1005 is an input device (e.g., 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 (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0136] 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.

[0137] Furthermore, base station 100 and terminal 200 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, processor 1001 may be implemented using at least one of these pieces of hardware.

[0138] 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., Radio Resource Control (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.

[0139] Each aspect / embodiment described in this disclosure may apply 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), a 6th generation mobile communication system (6G), an xth generation mobile communication system (xG) (where x is, for example, an integer or a decimal), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), 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 any other suitable system, and next generation systems extended, modified, created, or defined based on these. In addition, multiple systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A with 5G).

[0140] 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.

[0141] In the present disclosure, a specific operation described as being performed by a base station may 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.

[0142] 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.

[0143] 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 transmitted to another device.

[0144] 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).

[0145] The aspects / embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Notification of predetermined information (e.g., notification that "X is true") is not limited to explicit notification, but may be implicit (e.g., not notifying the predetermined information).

[0146] 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.

[0147] 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.

[0148] 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.

[0149] Note that terms described 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.

[0150] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services within this coverage.

[0155] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0156] In this disclosure, terms such as "terminal," "user terminal," "Mobile Station (MS)," and "User Equipment (UE)" may be used interchangeably.

[0157] 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.

[0158] At least one of the base station and the mobile station may be referred to as 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, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It 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 be 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 Internet of Things (IoT) device such as a sensor.

[0159] Furthermore, the base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the terminal 200 may be configured to have the functions of the base station 100 described above. 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 an uplink channel and a downlink channel may be read as a side channel.

[0160] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 100 may be configured to have the functions of the terminal 200 described above.

[0161] 11 shows an example of the configuration of a vehicle 2001. As shown in Fig. 11, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift 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.

[0162] The drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.

[0163] The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0164] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2027 provided in the vehicle. The electronic control unit 2010 may also be called an Electronic Control Unit (ECU).

[0165] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0166] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001.

[0167] The information service unit 2012 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0168] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., inertial measurement units (IMUs), inertial navigation systems (INSs), etc.), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.

[0169] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 2029, which are provided in the vehicle 2001.

[0170] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0171] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021 to 2029 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021 to 2029, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0172] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on the information service unit 2012 provided in the vehicle. The information service unit 2012 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)).

[0173] Furthermore, the communication module 2013 stores various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, axle 2009, sensors 2021 to 2029, and the like provided in the vehicle 2001.

[0174] 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 a table, database, or other data structure), and ascertaining, all of which are considered to be "judging" and "determining." "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory), all of which are considered to be "judging" and "determining." "Determining" and "determining" may also include resolving, selecting, choosing, establishing, comparing, and other actions, all of which are considered to be "judging" and "determining." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Also, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0175] 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.

[0176] The reference signal may also be abbreviated as RS, and may be called a pilot depending on the applicable standard.

[0177] 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."

[0178] 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 or that the first element must in some way precede the second element.

[0179] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0180] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0181] 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.

[0182] Numerology may be a communication parameter applied to the transmission and / or 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 the transceiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, etc.

[0183] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) A slot may be a time unit based on numerology.

[0184] A slot may include multiple minislots. Each minislot may consist of one or multiple 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.

[0185] 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.

[0186] For example, one subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as 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 to 13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be referred to as a slot, minislot, etc., instead of a subframe.

[0187] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station schedules each terminal by allocating radio resources (such as frequency bandwidth and transmission power that can be used by each terminal) in TTI units. However, the definition of TTI is not limited to this.

[0188] 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.

[0189] In addition, 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. Furthermore, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0190] A TTI having a time length of 1 ms may be referred to as a regular TTI (TTI in LTE Rel. 8 to 12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0191] 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.

[0192] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0193] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0194] 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, etc.

[0195] 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. A bandwidth part (BWP) (which may also be referred to as a partial bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a certain numerology in a certain carrier. Here, the common RBs may be identified by their indexes relative to the common reference point of the carrier. PRBs may be defined in a certain BWP and numbered within the BWP.

[0196] 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.

[0197] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a predetermined signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0198] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples, and various configurations, such as 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, and the cyclic prefix (CP) length, can be changed.

[0199] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0200] 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.

[0201] 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."

[0202] 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.

[0203] (Additional Note) The above disclosure may be expressed as follows.

[0204] A first feature is a terminal including: a transmitting unit that repeatedly transmits a message related to random access using a first resource to which time division duplex is applied, or a second resource that can utilize a subband within the time division duplex band and that has a different transmission and reception direction from the band; and a control unit that determines the second resource as a resource for the repeated transmission.

[0205] A second feature is the terminal based on the first feature, wherein the transmitter performs the repeated transmission by using the second resource that spans the first resource in a time direction.

[0206] A third feature is the terminal according to the first or second feature, wherein the transmitter transmits, via a preamble transmitted in the random access, information indicating whether or not the repeated transmission in the second resource is possible.

[0207] A fourth feature is the terminal according to any one of the first to third features, wherein the transmitter repeatedly transmits the message on a physical uplink shared channel related to the random access.

[0208] A fifth feature is the terminal according to any one of the first to third features, wherein the transmitter repeatedly transmits, as the message, a physical uplink control channel related to the random access.

[0209] A sixth feature is a terminal including: a transmitting unit that repeatedly transmits a message related to random access using a first resource to which time division duplex is applied and a second resource that can utilize a subband within a band of the time division duplex and that has a different transmission and reception direction from the band; and a control unit that determines the first resource and the second resource, which are consecutive in the time direction, as resources for the repeated transmission.

[0210] 10 Wireless communication system 20 NG-RAN 100 Base station 110 Wireless signal transmitting / receiving unit 120 Control unit 200 Terminal 210 Wireless signal transmitting / receiving unit 220 Amplifier unit 230 Modulation / demodulation unit 240 Control signal / reference signal processing unit 250 Encoding / decoding unit 260 Data transmitting / receiving unit 270 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Left and right front wheels 2008 Left and right rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 RPM sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving assistance system section 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. A terminal comprising: a transmitting unit that repeatedly transmits a message related to random access using a first resource to which time division duplex is applied, or a second resource that can use a sub-band within the time division duplex band and has a different transmission and reception direction from the band; and a control unit that determines the second resource as the resource for the repeated transmission.

2. The terminal according to claim 1, wherein the transmitting unit performs the repeated transmission using the second resource that spans the first resource in the time direction.

3. The terminal according to claim 1, wherein the transmitting unit transmits information indicating whether or not the repeated transmission in the second resource is possible via a preamble transmitted in the random access.

4. The terminal according to claim 1, wherein the transmission unit repeatedly transmits the message on a physical uplink shared channel related to the random access.

5. The terminal according to claim 1, wherein the transmission unit repeatedly transmits the message on a physical uplink control channel related to the random access.

6. A terminal comprising: a transmitting unit that repeatedly transmits a message related to random access using a first resource to which time division duplex is applied and a second resource that can use a sub-band within the time division duplex band and has a different transmission and reception direction from the band; and a control unit that determines the first resource and the second resource, which are consecutive in the time direction, as resources for the repeated transmission.

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