Terminal and communication method

Abstract

This terminal comprises: a transmission part that transmits a preamble in random access; and a control part that determines a first transmission opportunity for transmitting a preamble, on the basis of a first random access channel configuration for an uplink time unit or a flexible time unit, and determines a second transmission opportunity for transmitting a preamble, on the basis of a second random access channel configuration for a time unit in which a plurality of time division duplex subbands can be used. The control part does not expect that the first random access channel configuration including the first transmission opportunity is configured in the time unit in which the plurality of subbands can be used.

Description

Terminal and communication method

[0001] The present disclosure relates to a terminal and a communication method.

[0002] The 3rd Generation Partnership Project (3GPP) has developed specifications for the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation 10 (NG)), and is also developing specifications for the next generation of mobile communication systems, known as 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 the configuration related to the random access channel (RACH) (RACH configuration) to the SBFD symbol.

[0005] A terminal (hereinafter also referred to as a user equipment (UE)) determines a random access opportunity (RO) for transmitting a preamble to start a random access (RA) based on a RACH configuration from a base station (hereinafter also referred to as a gNodeB (gNB)), and further determines a valid RO (and an invalid RO) from the determined ROs. Furthermore, the valid RO is mapped to an index of a synchronization signal block (SSB index) based on SSB-to-RO mapping.

[0006] “New WID: Evolution of NR duplex operation: Sub-band full duplex (SBFD)”, RP-234035, 3GPP TSG RAN Meeting #102, 3GPP, December 11-15, 20233GPP TS 38.213 V18.2.0 (2024-03)

[0007] However, the study of RA in SBFD has been insufficient, and further study is required.

[0008] One aspect of the present disclosure is to provide a terminal and a communication method that can appropriately perform RA.

[0009] A terminal according to one aspect of the present disclosure includes a control unit that determines a first transmission opportunity for transmitting a preamble based on a first random access channel setting for an uplink time unit or a flexible time unit, and determines a second transmission opportunity for transmitting the preamble based on a second random access channel setting for a time unit in which multiple subbands of time division duplex are available, and a transmission unit that transmits the preamble at the first transmission opportunity and the second transmission opportunity, wherein the control unit does not expect the first random access channel setting including the first transmission opportunity to be set for the time unit in which the multiple subbands are available.

[0010] FIG. 1 is a diagram showing an overall schematic configuration of a wireless communication system. FIG. 2 is a diagram showing a frequency range used in the wireless communication system. FIG. 3 is a diagram showing an example configuration of a wireless frame, subframe, slot, and symbol used in the wireless communication system. FIG. 4 is a diagram showing an example configuration of SBFD. FIG. 5 is a diagram showing an example configuration of SBFD. FIG. 6 is a diagram explaining proposal 1. FIG. 7 is a diagram explaining proposal 2. FIG. 8 is a block diagram showing an example configuration of a base station. FIG. 9 is a block diagram showing an example configuration of a terminal. FIG. 10 is a diagram showing an example hardware configuration of a base station and a terminal according to an embodiment. FIG. 11 is a diagram showing an example configuration of a vehicle.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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 base station 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 terminal 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 base stations 100 and terminals 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."

[0015] The base station 100 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 terminal 200 and a central unit (CU) having a function for connecting to the network. In this case, the base station 100 may be read as a DU, a CU, or both a DU and a CU. When the base station 100 is read as a DU, it may be called a gNB-DU. When the base station 100 is read as a CU, it may be called a gNB-CU. When the base station 100 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.

[0016] 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

[0017] 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.

[0018] Note that SCS may be interpreted as numerology, which is defined in 3GPP TS 38.300 and corresponds to one subcarrier spacing in the frequency domain.

[0019] 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.

[0020] 3 is a diagram showing an example of the configuration of a radio frame (system frame), subframe, and slot used in the radio communication system 10. As shown in FIG. 3, one slot is composed of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). However, the SCS is not limited to the interval (frequency) shown in FIG. 3. For example, 480 kHz, 960 kHz, etc. may be used as the SCS.

[0021] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, it may be 28 or 56 symbols, etc.) Furthermore, the number of slots per subframe may differ depending on the SCS.

[0022] 3 may be called a time domain, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP), etc.

[0023] The wireless communication system 10 may support coverage enhancement (CE) that expands the coverage of a cell (or a physical channel) formed by the gNB 100. In the coverage enhancement, a mechanism for increasing the success rate of reception of various physical channels, such as repeated transmission (repetition) of a physical random access channel (PRACH), may be provided.

[0024] For example, the terminal 200 receives information related to the random access procedure from the base station 100 as a downlink (DL) signal (for example, SIB1 (System Information Block Type 1) or the like).

[0025] Furthermore, for example, terminal 200 transmits a PRACH as an UL signal to base station 100 using a RACH occasion (RO), which is a resource for transmitting a random access preamble. For example, terminal 200 repeatedly transmits the PRACH as an UL signal to base station 100.

[0026] The UL signal may include, for example, a UL data signal and control information. For example, the UL signal may include information related to the processing capability of the UE 200 (e.g., UE capability). The UL signal may also include a reference signal.

[0027] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channels may include a Physical Uplink Shared Channel (PUSCH), and the control channels may include a Physical Uplink Control Channel (PUCCH). For example, terminal 200 transmits control information using the PUCCH and transmits UL data signals using the PUSCH. Note that the PUSCH is an example of an uplink shared channel, and the PUCCH is an example of an uplink control channel. The shared channels may also be referred to as data channels.

[0028] The reference signal included in the UL signal may include at least one of, for example, a Demodulation Reference Signal (DMRS), a Phase Tracking Reference Signal (PTRS), a Channel State Information - Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, the reference signals such as the DMRS and PTRS are used to demodulate the UL data signal and are transmitted using the PUSCH.

[0029] Meanwhile, in response to the operation of the terminal 200, the base station 100 transmits information related to the RACH procedure to the terminal 200 as a DL signal (for example, SIB1, etc.).

[0030] Furthermore, for example, base station 100 receives PRACH as an UL signal from terminal 200. For example, base station 100 repeatedly receives PRACH from terminal 200 as an UL signal.

[0031] Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channel may include a physical downlink shared channel (PDSCH), and the control channel may include a physical downlink control channel (PDCCH). For example, base station 100 transmits control information to terminal 200 using the PDCCH, and transmits DL data signals using the PDSCH. Note that PDSCH is an example of a downlink shared channel, and PDCCH is an example of a downlink control channel. Note that PDCCH may be interpreted as downlink control information (DCI), control information, etc. transmitted in the PDCCH.

[0032] The reference signal included in the DL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRSRS, and PRS for location information. For example, the reference signal such as DMRS or PTRS is used for demodulating the DL data signal and is transmitted using the PDSCH.

[0033] <SBFD> Support for random access (RA) in SBFD is being considered for Release 19 (Non-Patent Document 1). SBFD is explained below.

[0034] 4 is a diagram illustrating SBFD. As shown in FIG. 4, SBFD may be applied to each symbol. Note that, in addition to DL and UL, each symbol may be set to Flexible (FL) that can be used as DL or UL, and then SBFD may be applied. The terms symbol, slot, time unit, time resource, and resource may be used interchangeably.

[0035] 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.

[0036] A symbol to which SBFD is applied is also called an SBFD symbol. "SBFD is applied" may be interpreted as SBFD being applied to at least a part of scheduling. In other words, a "symbol to which SBFD is applied" may be interpreted as a symbol to which SBFD is applied (SBFD symbol) in scheduling to which SBFD is applied. Furthermore, a "time unit to which non-SBFD is applied" may be interpreted as a symbol to which SBFD is not applied (non-SBFD symbol) in scheduling to which SBFD is applied.

[0037] As shown in Figure 4, DL or UL is assigned to each subband (SBFD subband) constituting the SBFD symbol. Hereinafter, a subband to which DL is assigned is also referred to as a DL subband, and a subband to which UL is assigned is also referred to as a UL subband. In Figure 4, symbols or subbands marked with "D" are DL symbols or DL ​​subbands, and symbols or subbands marked with "U" are UL symbols or UL subbands. Note that symbols marked with "F" in other figures are FL symbols.

[0038] It was agreed at the RAN1#116 meeting that SBFD symbols are configured in DL symbols and / or FL symbols configured in TDD-UL-DL-ConfigCommon. In this disclosure, the following terms may be used. Hereinafter, "and / or" may be written as " / ". SBFD DL symbol: A symbol instructed for DL ​​by tdd-UL-DL-ConfigurationCommon / tdd-UL-DL-ConfigurationDedicated, in which the SBFD subband is configured. SBFD FL symbol: A symbol instructed for FL by tdd-UL-DL-ConfigurationCommon / tdd-UL-DL-ConfigurationDedicated, in which the SBFD subband is configured. SBFD SSB symbol: A symbol configured for SSB reception, in which the SBFD subband is configured. Non-SBFD symbol: A symbol in which the SBFD subband is not configured / a symbol in which SBFD operation is not performed on the gNB side. SBFD-aware UE: A UE that supports SBFD operation. Legacy UE: A UE that does not support SBFD operation.

[0039] For example, when SBFD is applied to a DL symbol, an SBFD-aware UE can recognize the UL subband / DL subband in this SBFD symbol (SBFD DL symbol), but a legacy UE recognizes this SBFD symbol as a normal DL symbol.

[0040] <Agreed at RAN1#116 meeting> It was agreed that at least the following options 1 and 2 will be considered for PRACH for SBFD-aware UE in the RRC CONNECTED state: Option 1: Use of one RACH configuration with extensibility Option 2: Use of two separate RACH configurations, including one legacy RACH configuration and one additional RACH configuration

[0041] The legacy RACH configuration may be understood as, for example, a RACH configuration for non-SBFD symbols and a configuration for determining an RO for the non-SBFD symbols. On the other hand, a RACH configuration for SBFD symbols may be performed and an RO for the SBFD symbols may be determined based on the legacy RACH configuration.

[0042] The additional RACH configuration may be understood as, for example, a RACH configuration for SBFD symbols and a configuration for determining an RO for the SBFD symbols. On the other hand, a RACH configuration for non-SBFD symbols may be performed or an RO for the non-SBFD symbols may be determined based on the additional RACH configuration.

[0043] Option 2 is preferred for Contention Based Random Access (CBRA) and Contention Free Random Access (CFRA), and also when considering coexistence with legacy UEs.

[0044] Note that the legacy RACH configuration may be used interchangeably with the legacy PRACH configuration, and the additional RACH configuration may be used interchangeably with the additional PRACH configuration.

[0045] <Valid PRACH occasion> The terminal determines an RO for transmitting a preamble to initiate random access (RA) based on the RACH configuration from the base station. The terminal determines valid ROs (and invalid ROs) from the determined ROs. As an example, a legacy UE may determine an RO in which each symbol is a UL symbol / FL symbol as a valid RO from the determined ROs. For details, see Section 8.1 of Non-Patent Document 2.

[0046] <Considerations> By configuring separate PRACH settings for the additional RACH setting and the legacy RACH setting, the following two sets of valid ROs can be derived for each of the SBFD symbol and the non-SBFD symbol: Set #1: Valid ROs in SBFD set by the additional RACH setting for SBFD Set #2: Valid ROs set by the legacy RACH setting

[0047] Here, based on the definition of a valid RO in the legacy RACH configuration as described above in <valid PRACH occasion>, a valid RO may be within a UL symbol / FL symbol (cond. 1).

[0048] The SBFD symbol can be within a DL symbol / FL symbol as described above in <SBFD> (cond.2).

[0049] According to the above condition 1, a valid legacy RO may exist in the FL symbol due to the legacy RACH configuration. According to the above condition 2, an SBFD symbol may be configured in the FL symbol. Therefore, a valid legacy RO may exist in the SBFD FL symbol due to the legacy RACH configuration. For example, as shown by arrow A5a in Figure 5, a valid legacy RO may exist in the SBFD FL symbol. Note that "D, D, F, F, U" shown below the time axis in Figure 5 indicate tdd-UL-DL-Configuration Common / tdd-UL-DL-Configuration Dedicated.

[0050] From the above, the valid RO of the legacy (for example, arrow A5a in FIG. 5) and the valid RO in the SBFD set by the additional RACH setting (not shown in FIG. 5) may overlap, which is not a clean solution.

[0051] Therefore, in order to prevent the legacy valid RO and the valid RO in SBFD set by the additional RACH configuration from overlapping, the following cond.3 / cond.4 can be considered: cond.3: The (valid) RO set by the additional RACH configuration is within an SBFD symbol. cond.4: The (valid) RO set by the legacy RACH configuration is within a non-SBFD symbol.

[0052] For example, a valid RO set by the additional RACH configuration is located within the SBFD symbols (DL symbols / FL symbols) indicated by arrows A6a and A6b in Fig. 6 (cond. 3). For example, a valid RO set by the legacy RACH configuration is located within the non-SBFD symbols (UL symbols / FL symbols) indicated by arrows A6c and A6d in Fig. 6 (cond. 4).

[0053] Therefore, the present disclosure takes into consideration cond.3 / cond.4 and proposes a technique regarding valid RO restrictions set by legacy RACH configuration.

[0054] <Proposal 1> Proposal 1 relates to an SBFD-aware UE in which an additional RACH configuration for SBFD is configured. The UE is not expected to be configured with a legacy RACH configuration that includes a (valid) RO in the SBFD symbol. The base station does not configure a RACH with a legacy RACH configuration that includes a (valid) RO in the SBFD symbol.

[0055] Note that for valid ROs configured in the legacy RACH configuration, the rules described above in <valid PRACH occasion> apply. Expectation may be used interchangeably with assumption.

[0056] Example 1: The terminal does not expect to be configured with a legacy RACH configuration that includes an RO in the SBFD symbol.

[0057] For example, the terminal does not expect to be configured with a legacy RACH configuration that includes an RO in the SBFD symbol, as shown in the dotted box A7a in Fig. 7. For example, the terminal may expect to be configured with a legacy RACH configuration that does not include an RO in the SBFD symbol, as shown in the dotted box A8a in Fig. 8.

[0058] Example 2: The terminal does not expect to be configured with a legacy RACH configuration that includes an RO in the SBFD FL symbol.

[0059] For example, the terminal does not expect to be configured with a legacy RACH configuration that includes an RO in the SBFD FL symbol, as shown in the dotted box A7a in Fig. 7. For example, the terminal may expect to be configured with a legacy RACH configuration that does not include an RO in the SBFD FL symbol, as shown in the dotted box A8a in Fig. 8.

[0060] Example 3: The terminal does not expect a valid RO (any valid RO or at least one valid RO) configured by the legacy RACH configuration to be present in the SBFD(FL) symbol.

[0061] <Proposal 1: Variation> The terminal expects that the RO configured (valid) by the additional PRACH configuration is present in the SBFD DL symbol / SBFD FL symbol.

[0062] For example, the terminal expects that the RO configured (valid) by the additional PRACH configuration is in the SBFD DL symbol indicated by arrow A8b in FIG. 8 / the SBFD FL symbol indicated by arrow A8c in FIG.

[0063] <Proposal 1: Summary> The above operations prevent overlap between a valid legacy RO and a valid RO in an SBFD configured by an additional RACH configuration, allowing the terminal to properly perform RA in the additional PRACH configuration / legacy RACH configuration.

[0064] <Proposal 2> Proposal 2 relates to an SBFD-aware UE in which an additional RACH configuration for SBFD is configured. If an SBFD symbol has a valid RO configured by a legacy RACH configuration, the SBFD symbol is not used as an SBFD symbol. The base station may configure an RACH in the legacy RACH configuration that includes a valid RO in the SBFD symbol.

[0065] Example 1: The terminal regards a symbol that includes (or overlaps with) an RO configured by the legacy RACH configuration as a non-SBFD symbol.

[0066] If an SBFD symbol includes (or overlaps with) an RO configured by a legacy RACH configuration, the SBFD subband configuration is not applied to the SBFD symbol, i.e., the SBFD symbol is converted to a non-SBFD symbol.

[0067] For example, the terminal converts an SBFD symbol including an RO configured by the legacy RACH configuration, as indicated by an arrow A9a in FIG. 9, into a non-SBFD symbol.

[0068] The terminal behavior on symbols converted from SBFD symbols to non-SBFD symbols follows the behavior on non-SBFD symbols, including legacy ROs.

[0069] Example 2: The terminal regards an FL symbol that includes (or overlaps with) an RO configured by the legacy RACH configuration as a non-SBFD symbol.

[0070] If an SBFD FL symbol includes (or overlaps with) an RO configured by a legacy RACH configuration, the SBFD subband configuration is not applied to the SBFD FL symbol, i.e., the SBFD FL symbol is converted to a non-SBFD FL symbol.

[0071] For example, the terminal converts an SBFD FL symbol including an RO configured by the legacy RACH configuration, as indicated by an arrow A9a in FIG. 9, into a non-SBFD symbol.

[0072] The terminal operation on symbols converted from SBFD FL symbols to non-SBFD FL symbols follows the operation on non-SBFD symbols including legacy RO.

[0073] Example 3: The terminal regards (FL) symbols that include (or overlap with) a valid RO configured by the legacy RACH configuration as non-SBFD symbols.

[0074] If an SBFD (FL) symbol contains (or overlaps with) a valid RO configured by the legacy RACH configuration, the SBFD subband configuration is not applied to the SBFD (FL) symbol, i.e., the SBFD (FL) symbol is converted to a non-SBFD (FL) symbol.

[0075] The terminal operation on symbols converted from SBFD (FL) symbols to non-SBFD (FL) symbols follows the operation on non-SBFD (FL) symbols with legacy valid RO.

[0076] <Proposal 2: Variation> The terminal expects that a valid RO configured by an additional PRACH configuration is present in the SBFD DL symbol. The terminal expects that a valid RO configured by an additional PRACH configuration is not present in the SBFD FL symbol.

[0077] For example, the terminal expects that a valid RO set by the additional PRACH configuration is present in the SBFD DL symbol shown by arrow A9b in Fig. 9. For example, the terminal expects that a valid RO set by the additional PRACH configuration is not present in the SBFD FL symbol shown by arrow A9a in Fig. 9.

[0078] <Proposal 2: Summary> The above operations prevent overlap between a valid legacy RO and a valid RO in an SBFD configured by an additional RACH configuration, allowing the terminal to properly perform RA in the additional PRACH configuration / legacy RACH configuration.

[0079] <Variations> Proposals 1 and 2 may be applied to terminals in connected mode / terminals in RRC idle mode.

[0080] Proposals 1 and 2 may be applied to CBRA / CFRA.

[0081] <Configuration of Base Station> Fig. 10 is a block diagram showing an example of the configuration of a base station 100 according to an embodiment. The base station 100 includes, for example, a transmitting unit 101, a receiving unit 102, and a control unit 103. The base station 100 communicates with a terminal 200 (see Fig. 11) by radio. The base station 100 may be an intermediate node, a support node, or a terminal (a terminal in SL that communicates with the terminal 200).

[0082] The transmitter 101 transmits a downlink (DL) signal to the terminal 200. For example, the transmitter 101 transmits the DL signal under the control of the controller 103.

[0083] The DL signal may include, for example, a downlink data signal and control information (e.g., Downlink Control Information (DCI)). The DL signal may also include information indicating scheduling related to signal transmission of terminal 200 (e.g., an UL grant). The DL signal may also include control information of higher layers (e.g., control information of Radio Resource Control (RRC)). The DL signal may also include a reference signal.

[0084] Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channels may include a PDSCH (Physical Downlink Shared Channel), and the control channels may include a PDCCH (Physical Downlink Control Channel). For example, the base station 100 transmits control information to the terminal 200 using the PDCCH and transmits downlink data signals using the PDSCH.

[0085] The reference signal included in the DL signal may include at least one of a demodulation reference signal (Demodulation Reference Signal (DMRS)), a Phase Tracking Reference Signal (PTRS), a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, reference signals such as DMRS and PTRS are used for demodulating downlink data signals and are transmitted using the PDSCH.

[0086] The receiving unit 102 receives an uplink (UL) signal transmitted from the terminal 200. For example, the receiving unit 102 receives the UL signal under the control of the control unit 103.

[0087] The control unit 103 controls the communication operations of the base station 100 , including the transmission processing of the transmission unit 101 and the reception processing of the reception unit 102 .

[0088] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 101. The control unit 103 also outputs the data, control information, etc. received from the receiving unit 102 to the upper layer.

[0089] For example, the control unit 103 allocates resources (or channels) used for transmitting and receiving DL signals and / or resources used for transmitting and receiving UL signals based on signals (e.g., data and control information, etc.) received from the terminal 200 and / or data and control information, etc. acquired from a higher layer. Information related to the allocated resources may be included in control information transmitted to the terminal 200.

[0090] Control unit 103 configures PUCCH resources as an example of allocation of resources used for transmitting and receiving UL signals. Information related to PUCCH configuration such as a PUCCH cell timing pattern (PUCCH configuration information) may be reported to terminal 200 by RRC.

[0091] 11 is a block diagram showing an example of the configuration of a terminal 200 according to an embodiment. The terminal 200 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. The terminal 200 communicates with, for example, a base station 10 wirelessly.

[0092] The receiving unit 201 receives a DL signal transmitted from the base station 10. For example, the receiving unit 201 receives the DL signal under the control of the control unit 203.

[0093] The transmitting unit 202 transmits the UL signal to the base station 10. For example, the transmitting unit 202 transmits the UL signal under the control of the control unit 203.

[0094] The UL signal may include, for example, an uplink data signal and control information (e.g., UCI). For example, information related to the processing capability of the terminal 200 (e.g., UE capability) may be included. The UL signal may also include a reference signal.

[0095] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channels include a PUSCH (Physical Uplink Shared Channel), and the control channels include a PUCCH (Physical Uplink Control Channel). For example, the terminal 200 receives control information from the base station 10 using the PUCCH and transmits uplink data signals using the PUSCH.

[0096] The reference signals included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRS, and PRS. For example, the reference signals such as DMRS and PTRS are used for demodulating the uplink data signal and are transmitted using an uplink channel (for example, PUSCH).

[0097] The control unit 203 controls the communication operations of the terminal 200 , including the reception processing in the receiving unit 201 and the transmission processing in the transmitting unit 202 .

[0098] For example, the control unit 203 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 202. Also, the control unit 203 outputs, for example, the data and control information received from the receiving unit 201 to the upper layer.

[0099] For example, the control unit 203 controls transmission of information to be fed back to the base station 10. The information to be fed back to the base station 10 may include, for example, HARQ-ACK, channel state information (CSI), or a scheduling request (SR). The information to be fed back to the base station 10 may be included in UCI. The UCI is transmitted in the resources of the PUCCH.

[0100] The control unit 203 sets PUCCH resources based on configuration information (for example, configuration information such as a PUCCH cell timing pattern notified by RRC and / or DCI) received from the base station 10. The control unit 203 determines the PUCCH resources to be used for transmitting information to be fed back to the base station 10. Under the control of the control unit 203, the transmission unit 202 transmits the information to be fed back to the base station 10 in the PUCCH resources determined by the control unit 203.

[0101] Note that the channel used for transmitting the DL signal and the channel used for transmitting the UL signal are not limited to the above-mentioned examples. For example, the channel used for transmitting the DL signal and the channel used for transmitting the UL signal may include a Random Access Channel (RACH) and a Physical Broadcast Channel (PBCH). The RACH may be used to transmit Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI), for example.

[0102] Here, the control unit 203 may determine the first transmission opportunity for transmitting the preamble based on a first random access channel configuration for an uplink time unit or a flexible time unit. The uplink time unit may be, for example, a UL symbol. The flexible time unit may be an FL symbol. The first random access channel configuration may be a legacy RACH configuration.

[0103] The control unit 203 may determine a second transmission opportunity for transmitting a preamble based on a second random access channel configuration for a time unit in which multiple subbands for time division duplexing are available. The time unit in which multiple subbands for time division duplexing are available may be, for example, an SBFD symbol. The second random access channel configuration may be an additional RACH configuration.

[0104] The transmitter 202 may transmit a preamble at the first transmission opportunity and the second transmission opportunity.

[0105] The control unit 203 may not expect that a first random access channel configuration including a first transmission opportunity is configured for a time unit in which multiple subbands are available. For example, the control unit 203 may not expect that a legacy RACH configuration including an RO according to the legacy RACH configuration is configured for an SBFD symbol.

[0106] The control unit 203 may not expect that the first random access channel configuration including the first transmission opportunity is configured in a flexible time unit in which multiple subbands are available. For example, the control unit 203 may not expect that the legacy RACH configuration including the RO according to the legacy RACH configuration is configured in the SBFD FL symbol.

[0107] The control unit 203 may not expect that a first random access channel configuration including a valid first transmission opportunity is configured for a time unit in which multiple subbands are available. For example, the control unit 203 may not expect that a legacy RACH configuration including a valid RO according to the legacy RACH configuration is configured for an SBFD symbol.

[0108] When a first transmission opportunity is included in a time unit in which multiple subbands are available, the control unit 203 may convert the time unit into a time unit in which multiple subbands are unavailable. For example, when an SBFD symbol includes an RO due to a legacy RACH configuration, the control unit 203 may convert the SBFD symbol into a non-SBFD symbol.

[0109] When the first transmission opportunity is included in a flexible time unit in which multiple subbands are available, the control unit 203 may convert the time unit into a time unit in which multiple subbands are unavailable. For example, when an SBFD FL symbol includes an RO due to a legacy RACH configuration, the control unit 203 may convert the SBFD FL symbol into a non-SBFD symbol.

[0110] When a time unit in which multiple subbands are available includes a valid first transmission opportunity, the control unit 203 may convert the time unit into a time unit in which multiple subbands are unavailable. For example, when an SBFD symbol includes a valid RO due to a legacy RACH configuration, the control unit 203 may convert the SBFD symbol into a non-SBFD symbol.

[0111] The present disclosure has been described above. Note that the division of items in the above description is not essential to the present disclosure, and items described in two or more items may be used in combination as needed, and items described in one item may be applied to items described in another item (unless they are inconsistent).

[0112] <Hardware Configuration, etc.> The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and 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., using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or the multiple devices.

[0113] Functions include, but are not limited to, judgment, determination, assessment, 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.

[0114] For example, a base station, a terminal, or 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. 12 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to this embodiment. The above-described base station 100 and terminal 200 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.

[0115] 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.

[0116] Each function in the base station 100 and the terminal 200 is realized by loading specified 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.

[0117] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 103 and control unit 203 may be realized by the processor 1001.

[0118] 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. For example, the control unit 203 of the terminal 200 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by one processor 1001, they may also 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 also be transmitted from a network via a telecommunications line.

[0119] 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 an embodiment of the present disclosure.

[0120] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible 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. 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 appropriate medium including at least one of memory 1002 and storage 1003.

[0121] 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 at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitter 101, receiver 102, receiver 201, transmitter 202, etc. may be realized by the communication device 1004.

[0122] 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. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0123] 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.

[0124] 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.

[0125] <Notification of Information, Signaling> Notification of information is not limited to the embodiments described in the present disclosure and may be performed using other methods. For example, 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, 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.

[0126] <Applicable Systems> The embodiments described in the present disclosure are applicable to LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802.34 (WiMAX (registered trademark The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of LTE and / or LTE-A with 5G).

[0127] <Processing Procedures, etc.> The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be rearranged unless inconsistent. 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.

[0128] <Operation of Base Station> In the present disclosure, specific operations described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, an MME or an S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0129] <Direction of Input / Output> Information, etc. (see <Information, Signal>) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may also be input / output via multiple network nodes.

[0130] <Handling of Input / Output Information, etc.> Input / output information, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, etc. may be overwritten, updated, or added. Output information, etc. may be deleted. Input information, etc. may be sent to another device.

[0131] <Determination method> 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).

[0132] <Variations of Aspects, etc.> Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation. In addition, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0133] 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.

[0134] <Software> 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.

[0135] 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.

[0136] 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., which 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.

[0137] 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.

[0138] <System, Network> As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0139] <Parameter and Channel Names> Furthermore, the information, parameters, and the like 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.

[0140] 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.

[0141] <Base Station> In the present 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. A base station may also be referred to by terms such as a macrocell, a small cell, a femtocell, and a picocell.

[0142] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a remote radio head (RRH)). The terms "cell" or "sector" refer to part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0143] 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.

[0144] Mobile Station In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," and the like may be used interchangeably.

[0145] 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.

[0146] <Base Station / Mobile Station> 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 a mobile object that moves autonomously 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 IoT (Internet of Things) device such as a sensor.

[0147] Furthermore, the base station in the present disclosure may be read as a terminal. For example, the 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.

[0148] 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.

[0149] Fig. 13 shows an example configuration of a vehicle 2001. As shown in Fig. 13, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0150] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. 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.

[0151] 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 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0152] 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.

[0153] 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 that control these devices. The information service unit 2012 provides various types of multimedia information and multimedia services to the occupants of the vehicle 2001 by using information acquired from external devices via the communication module 2013, etc.

[0154] 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.

[0155] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0156] The communication module 2013 can communicate with the microprocessor 2031 and the 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, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0157] 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.

[0158] 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.

[0159] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. 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)).

[0160] 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, front wheels 2007, rear wheels 2008, axle 2009, sensors 2021 to 2029, and the like provided in the vehicle 2001.

[0161] <Meaning and Interpretation of Terms> 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), ascertaining something that is considered to be a "judging" or "determining," and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like that are considered to be a "judging" or "determining." Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0162] 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.

[0163] <Reference Signal> A reference signal can also be abbreviated as RS (Reference Signal), and may also be called a pilot depending on the applicable standard.

[0164] <Meaning of "based on"> 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."

[0165] "First," "Second" Any reference to an element using designations such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, 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 precede the second element in some way.

[0166] <Means> The "means" in the configuration of each device above may be replaced with "section," "circuit," "device," etc.

[0167] Open Format: 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.

[0168] <Time Units such as TTI, Frequency Units such as RB, and Radio Frame Configuration> 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.

[0169] Numerology may be a communication parameter that applies to the transmission and / or reception of a signal or channel, and may indicate, for example, at least one of 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, and specific windowing operations performed by the transceiver in the time domain.

[0170] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol). A slot may be a time unit based on numerology.

[0171] 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.

[0172] 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.

[0173] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0174] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0175] 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.

[0176] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0177] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0178] 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 greater than or equal to 1 ms.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0184] 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.

[0185] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0186] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples, and various changes may be made to the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.

[0187] <Maximum Transmit Power> The "maximum transmit power" in the present disclosure may refer to the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0188] Articles 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.

[0189] <"Different"> In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that 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."

[0190] One aspect of the present disclosure is useful in wireless communication systems.

[0191] 100 Base station 200 Device 101, 202 Transmitter 102, 201 Receiver 103, 203 Controller

Claims

1. A terminal comprising: a control unit that determines a first transmission opportunity for transmitting a preamble based on a first random access channel setting for an uplink time unit or a flexible time unit, and determines a second transmission opportunity for transmitting the preamble based on a second random access channel setting for a time unit in which multiple subbands of time division duplex are available; and a transmission unit that transmits the preamble at the first transmission opportunity and the second transmission opportunity, wherein the control unit does not expect the first random access channel setting including the first transmission opportunity to be set for the time unit in which the multiple subbands are available.

2. The terminal according to claim 1, wherein the control unit does not expect the first random access channel configuration including the first transmission opportunity to be set in a flexible time unit in which the plurality of subbands are available.

3. The terminal according to claim 1, wherein the control unit does not expect the first random access channel configuration including the first transmission opportunity that is valid for a time unit in which the plurality of subbands are available to be set.

4. The terminal according to claim 1, wherein, when the first transmission opportunity is included in a time unit in which the plurality of subbands are available, the control unit converts the time unit into a time unit in which the plurality of subbands are unavailable.

5. The terminal according to claim 1, wherein, when the first transmission opportunity is included in a flexible time unit in which the plurality of subbands are available, the control unit converts the time unit into a time unit in which the plurality of subbands are unavailable.

6. A communication method in which a terminal determines a first transmission opportunity for transmitting a preamble based on a first random access channel setting for an uplink time unit or a flexible time unit, determines a second transmission opportunity for transmitting a preamble based on a second random access channel setting for a time unit in which multiple subbands of time division duplex are available, transmits the preamble at the first transmission opportunity and the second transmission opportunity, and does not expect the first random access channel setting including the first transmission opportunity to be set for the time unit in which the multiple subbands are available.

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